Title Characterization of post-traumatic - ARAN Home
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Title Characterization of post-traumatic - ARAN Home
Provided by the author(s) and NUI Galway in accordance with publisher policies. Please cite the published version when available. Title Author(s) Characterization of post-traumatic immunosuppression and its partial reversal by autologous salvaged blood transfusion Islam, Nahidul Publication Date 2015-01-28 Item record http://hdl.handle.net/10379/4868 Downloaded 2016-11-17T10:50:13Z Some rights reserved. For more information, please see the item record link above. CHARACTERIZATION OF POST-TRAUMATIC IMMUNOSUPPRESSION AND ITS PARTIAL REVERSAL BY AUTOLOGOUS SALVAGED BLOOD TRANSFUSION A thesis submitted to the National University of Ireland Galway in fulfilment of the requirements for the degree of Doctor of Philosophy by Nahidul Islam B.Sc., M.Sc., M.Sc. (Research) Immunology and Transplant Biology Group, Regenerative Medicine Institute, National Centre for Biomedical Engineering Science, Biosciences, National University of Ireland, Galway Thesis Supervisors: Professor Benjamin A Bradley Avon Orthopaedic Centre, Southmead Hospital, University of Bristol, UK Professor Rhodri Ceredig Regenerative Medicine Institute, NCBES, Biosciences, NUI Galway, Ireland July 2014 Characterization of Post-Traumatic Immunosuppression and Its Partial Reversal By Autologous Salvaged Blood Transfusion TABLE OF CONTENTS Declaration VII Abstract VIII Acknowledgement X Dedications XI Abbreviations XII List of Figures XV List of Tables XVIII 1-37 Chapter - I : Introduction 1.1. Post-traumatic Immunosuppression (PTI) 2 1.1.1. Definitions 3 1.1.2. Historical Context 4 1.1.3. Systemic Inflammatory Response Syndrome 5 1.2. Distinguishing Sterile Trauma from Sepsis 9 1.3. Immunological changes following Sterile Trauma 12 1.3.1. Local Site of Trauma 13 1.3.2. Ischaemic-Reperfusion Injury 14 1.3.3. Hypothalamus - Pituitary - Endocrine axis 16 1.3.4. Changes in Lympho-haemopoiesis 16 1.3.5. Changes in Blood Plasma 20 1.3.6. Changes in Liver 23 1.4. Repairing Injured Tissue 23 1.4.1. Cell Activation Triggers 23 1.4.2. Soluble Factors 24 1.4.3. MSCs, the Warden of Tissue Repair 26 1.5. Aggravating Factors of PTI 27 1.6. Immunological Consequences of PTI 28 1.7. Treatment of PTI 30 1.8. Autologous Blood Transfusion; Types of transfusion 31 1.9. Total Knee Arthroplasty and Postoperative Salvaged Blood Transfusion 34 II Characterization of Post-Traumatic Immunosuppression and Its Partial Reversal By Autologous Salvaged Blood Transfusion 1.10. Knowledge Gaps at the time of Project Design 36 1.11. Study Aims and Hypotheses 37 38 - 63 Chapter - II : Materials and Methods 2.1. Study Design 39 2.2. Ethical Approval 39 2.3. Patient Selection and Recruitment 39 2.4. Haematological and Biochemical Data 40 2.5. Blood Transfusion Procedure 40 2.5.1. Sampling of Blood from Patients 42 2.5.2. Blood Sample Collection, Isolation of Plasma 44 2.5.3. Separation and Storage of PBMC 45 2.6. Cell Culture of Stored PBMC 45 2.7. Blood Collection for Proteomic and Glycomic Analyses 45 2.8. Flow Cytometric Bead Array 46 2.9.Enzyme Linked Immuno-Sorbent Assay (ELISA) 48 2.10. Human Whole Blood Culture Assay 51 2.11. Automated Liquid Handing 51 2.12. High Abundant Protein Depletion from Blood Plasma 52 2.12.1. Importance of Depletion 52 2.12.2. Depletion Technique 53 2.13. Quantification of Proteins (Bradford Assay) 54 2.14. One Dimensional Gel Electrophoresis 55 2.15. Proteomic Array 56 2.16. Glycomic Array (Lectin Profiling) 59 2.17. Statistical Analyses of the Study 62 III Characterization of Post-Traumatic Immunosuppression and Its Partial Reversal By Autologous Salvaged Blood Transfusion Chapter – III : RESULTS: Characterization of Post-traumatic 64 - 91 Immunosuppression (PTI) and Assessment of the Effect of Autologous Salvaged Blood Transfusion 3.1. Patients‟ Characteristics 65 3.2. Damage Associated Molecular Patterns 67 3.3. Pro-inflammatory Cytokines 69 3.4. Anti-inflammatory Cytokines 71 3.5. Chemokines 73 3.6. Interleukin-22 74 3.7. Soluble IL-6R, Soluble gp130 and ADAM-17 75 3.8. Soluble CD14 76 3.9. Lysozyme Activity 77 3.10. CD-24, Siglec-10 and Siglec-2 78 3.11. Complement Split Protein – C5a 79 3.12. In-vitro PBMC Culture With or Without LPS Stimulation 80 3.13. Summary of Postoperative Observations 85 3.14. Correlation Between Postoperative Changes in Different Biomarkers 89 Chapter – IV : RESULTS: Constituents of Salvaged Blood 92-110 4.1. Damage Associated Molecular Patterns 93 4.2. Pro-inflammatory Cytokines 95 4.3. Anti-inflammatory Cytokines 97 4.4. Chemokines 99 4.5. Interleukin-22 100 4.6. Soluble IL-6R, Soluble gp130 and ADAM-17 101 4.7. Soluble CD14 102 4.8. Lysozyme Activity 103 4.9. CD-24, Siglec-10 and Siglec-2 104 4.10. Complement Split Protein – C5a 105 4.11. Summary of Observations 106 4.12. Correlation on Fold Changes in Salvaged Bloods Between all different Biomarkers 108 IV Characterization of Post-Traumatic Immunosuppression and Its Partial Reversal By Autologous Salvaged Blood Transfusion Chapter – V : RESULTS: Proteomic and Glycomic Profiling of Salvaged 111 - 121 Blood 5.1. One Dimensional Gel Electrophoresis 112 5.2. Tandem Mass Tagging 113 5.3. Lectin Array 118 Chapter – VI : Discussion 122 - 144 6.1. Characterization of Post-traumatic Immunosuppression and Assessment 123 of the Effect of Autologous Salvaged Blood Transfusion 6.2. Constituents of Salvaged Blood 130 6.3. Diverse Roles of Interleukin-6 135 6.4. Proteomic and Glycomic Profiling of Venous and Salvaged Blood 136 6.5. Differences with Other‟s Results 137 6.6. Biological Insights into Effects of Sterile Trauma 138 6.6.1. Enhancement in Antimicrobial Properties 138 6.6.2. Role of CD24/Siglec-10 axis in Immunology 139 6.7. Clinical Significance of Findings 141 6.8. Limitations of this Study 142 6.9. Future Directions 143 Chapter – VII : Appendices 145 - 182 Appendix-I: Levels of Biomarkers in Wound Blood 146 Appendix-II: Levels of Biomarkers Postoperatively Following Major Surgery 147 Appendix-III(A): Correlation Between Biomarker Levels and Transfused 151 Blood Volume Appendix-III(B): Correlation Between Biomarker Levels and Length of 152 Hospital Stay Appendix-III(C): Correlation Between Biomarker Levels and Drained Blood Volume 153 V Characterization of Post-Traumatic Immunosuppression and Its Partial Reversal By Autologous Salvaged Blood Transfusion Appendix-IV: Pre- and Post-Operative Levels of Different Biomarkers 154 Appendix-V: Levels of Different Biomarkers in Peripheral and Salvaged 155 Blood Appendix-VI: In Vitro Studies on sCD14, IL-1β, And TNF-α Productions by 156 Fresh PBMCs and Human Whole Blood Culture Appendix-VII: Simulation of Salvaged Blood Collection Conditions 158 Appendix-VIII: Effect of Lysozyme on Productions Of Different Biomarkers 160 In Human Whole Blood Culture Appendix-IX: Details of Biomarkers Assessed by Tandem Mass Tagging 161 Appendix-X: Patients‟ Consent Form 170 Appendix-XI: Funding Bodies 174 Appendix-XII: Publications, Presentations and Achievements 175 Appendix-XIII: Additional Research Projects 177 Appendix-XIV: Lists of Reagents 179 Appendix-XV: Cross-Reactivity of the Measured Analytes 182 Chapter – VIII : References 183 - 208 VI Characterization of Post-Traumatic Immunosuppression and Its Partial Reversal By Autologous Salvaged Blood Transfusion DECLARATION I, Nahidul Islam, confirm that all the laboratory work presented in this thesis is my own. Where information has been derived from other sources, I confirm that this has been indicated in the thesis. I also declare that Professor Benjamin Bradley was the principle investigator and originator of this study. Benjamin, I, Professor Gordon Bannister, Professor Ashley Blom and Mr. Michael Whitehouse designed the study. Gordon. Ashley, Michael and Mr. Sanchit Mehandale organized patient recruitment and administered the surgical and post-operative treatment protocol. I collected, processed and preserved all blood samples and conducted all laboratory based assays. Dr. Enda O‟Connell and I developed and optimized automated ELISA assays. Benjamin and Professor Rhodri Ceredig supervised and guided all the laboratory studies. Benjamin and Rhodri also helped me in the interpretations of the data. VII Characterization of Post-Traumatic Immunosuppression and Its Partial Reversal By Autologous Salvaged Blood Transfusion ABSTRACT Documentary evidence of post-traumatic immunosuppression (PTI) is traceable back to 1856. Although improved hygiene has ameliorated many risks, vulnerability to systemic infection following major surgery or closed injury persists. Underlying mechanisms remain enigmatic and few effective treatments exist. Knee replacement surgery offers an ideal clinical model to characterize immune status after sterile trauma in terms of blood biomarkers. The main objective was to identify biomarkers of PTI, and establish how these were altered by anti-coagulated salvaged blood transfusion. A prospective non-randomized cohort study involved 43 patients undergoing primary total knee arthroplasty, 25 of whom received anti-coagulated salvaged blood transfusions collected post-operatively, and 18 non-transfused patients. Biomarkers of sterile trauma included haematological values, Damage-Associated-MolecularPatterns (DAMPs), cytokines, and chemokines. Salvaged blood was analysed within one hour and six hours after commencing collection. Biomarker levels were expressed as fold-changes over pre-operative values. Two groups of biomarkers were revealed: the first were termed as “common biomarkers of sterile trauma” that were common to all 43 patients with no differences in changes between the two cohorts; whereas the second were termed as “Salvaged Blood Sensitive Biomarkers of sterile trauma” as these were reversed by anti-coagulated salvaged blood re-infusion. The former included the following: leukocytosis, monocytosis, neutrophilia, erythropenia, decreased haemoglobin and haematocrit values, thrombocytopenia, lymphopenia, and also decreased numbers of eosinophils and basophils; increased levels of: Interleukin (IL)-6, IL-1-ReceptorAntagonist (IL-1RA), IL-8, Heat-Shock-Protein-(HSP)-70, Calgranulin-S100-A8/9, α-Defensins, Heat Stable Antigen (CD24), Sialic Acid Binding Ig-Like Protein-10 (Siglec-10), Soluble CD14, Lysozyme and Anaphylatoxin C5a; and, decreased levels of Soluble IL-6 Receptor, Soluble gp130 and High Mobility Group Box Protein-1 (HMGB-1). SBS-BST included increased levels of: IL-1-β, IL-2, IL-17A, Interferon- VIII Characterization of Post-Traumatic Immunosuppression and Its Partial Reversal By Autologous Salvaged Blood Transfusion gamma (IFN-γ), Tumour-Necrosis-Factor-alpha (TNF-α), Annexin-A2, ADAM-17 and IL-22; and decreased levels of: IL-4, IL-5, IL-10, and IL-13. Analyses of salvaged blood revealed two groups of biomarkers. The first group was termed as “Stable biomarkers of salvaged blood” that had no additional production during the collection period in the bag, and were assumed to have been continuously synthesized in-vivo within the wound site. Stable biomarkers included: sustained high levels of certain DAMPs including: Calgranulin-S100-A8/9, alphaDefensin, HSP-27, HSP-60, HSP-70, α-Defensins IL-9; and low levels of IL-13. The second group termed as “Dynamic biomarkers of salvaged blood”, since on-going synthesis or reduction was observed during ex-vivo collections of salvaged blood. These included: increasing levels of Annexin-A2, IL-1-β, IL-1RA, IL-2, IL-4, IL-6, IL-8, IL-10, IL-12p70, IL-17A, IFN-γ, TNF-α, Transforming-Growth-Factor-Beta-1 (TGF-β1), Monocyte-Chemotactic-Protein-1, Macrophage-Inflammatory-Protein-1alpha, IL-22, ADAM-17, Soluble CD14, Lysozyme; and, decreasing levels of HMGB-1 and Keratinocyte Growth Factor. This study also indicated that sterile trauma human enhanced levels of antimicrobial proteins, including soluble CD14, Lysozyme, Calgranulin and alpha-Defensin. Furthermore elevated levels of Siglec-10 and soluble CD24 suggested enhanced regulation of autoimmune reaction to neoantigens exposed by necrotic tissues. This study showed that whereas early salvaged blood reflected suppressed immune status associated with PTI, it developed immunostimulatory properties ex-vivo that upon reinfusion subsequently reversed PTI. The detailed characterisations of immunostimulatory constituents of salvaged blood responsible for this phenomenon and their therapeutic potential have yet to be performed. IX Characterization of Post-Traumatic Immunosuppression and Its Partial Reversal By Autologous Salvaged Blood Transfusion ACKNOWLEDGEMENTS I would like to gratefully acknowledge my supervisor Prof. Ben Bradley for accepting me in his Research team. His enthusiasm, support, honesty, generosity and professional help accompanied all the period of preparing and finishing this work. Thanks for teaching me how to critically think, design and complete an experiment independently. Also, I am very grateful to my supervisor Prof. Rhodri Ceredig for his never ending support, ideas, advice, inspiration and critique since 2011. Long may it continue. Thanks for valuing my ideas and your support whenever I needed. Thanks to the surgical team in Bristol, Prof. Ashley, Prof. Gordon, Mike and Sanchit; without them this study would not be possible. Special thanks to all the patients who happily donated their blood several times for this study; nurses and other hospital staffs also deserve thanks for their support during my stay in Southmead hospital. Thanks to Prof. Lokesh Joshi for allowing me to do the lectin microarray in his lab. Also thanks to Catherine for her wonderful help in setting up the glycobiology experiment, that otherwise would be difficult for me to complete. Very special thanks to Satbir for her support in proteomic and glycomic data analyses. Very special thanks to Dr. Michael Hall for his time and guidance in Institute of Technology Tralee. Also, thanks to Dr. Joanna Tierney and Felicity Bentley for training me in the required laboratory techniques. Dr. Jane Eastlake (Bristol), thank you for the study on microvesicular cytokines. Also, thanks to Dr. Eugene McCarthy (Galway-Mayo Institute of Technology), Dr. Dilip Rai (Teagasc) and Mr. Brendan Harhen (NUI Galway) for their advice on proteomic studies. Prof. Matthew Griffin, thanks for sharing your knowledge bank and advices throughout the years. Also thanks to all the Immunology group members in REMEDI and other NCBES colleagues for their fun and for not saying „no‟ whenever I needed a helping hand; especially Claas for showing me how to handle Accuri-C6. I would also like to thank the funding bodies for supporting this work, including Irish Research Council, Science Foundation Ireland, Enterprise Ireland and North Bristol NHS Orthopaedic Trust. No words can describe my gratitude to my mother (Shirin), wife (Sonny), brother (Shahin), sister (Nigar), sister-in-law (Shahnaj) and brother-in-law (Mostafa). Thank you all for the encouragement and support which allowed me to pursue my dreams. Also, I would like to thank my friends, specially, Anwar, Dipankar, Sumon, Mahbub and Rasel for fun and inspirations. X Characterization of Post-Traumatic Immunosuppression and Its Partial Reversal By Autologous Salvaged Blood Transfusion Dedicated to my mother SHIRIN AKTER XI Characterization of Post-Traumatic Immunosuppression and Its Partial Reversal By Autologous Salvaged Blood Transfusion ABBREVIATIONS AAL ABL ACA ACD ACTH ADAM-17 AIA AMP ANH ANOVA APC APP ASBT BCL2 BM BSA BST CAA CARS C-BST CCL CCM CCR-2 CD CPT CRF CRP CXCL CXCR DAMPs DC DMSO DSA EGFR ELISA FCS FGF FSAP GalNAc G-CSF GFP GI Aleuria aurentia lectin Agaricus bisporus lectin Amaranthus caudatus agglutinin Acid Citrate Dextrose adreno-cortico-tropic-hormone A Disintegrin And Metalloproteinase - domain 17 Artocarpus integrifolia lectin antimicrobial peptide Acute normovolemic hemodilution Analysis of variance antigen presenting cells Acute Phase Proteins Autologous salvaged blood transfusion B-cell lymphoma 2 Bone marrow Bovine serum albumin Biomarkers of sterile trauma Caragana arborescens lectin Compensatory Anti-inflammatory Response Syndrome Common Biomarkers of Sterile Trauma Chemokine Ligand complete culture medium C-C chemokine receptor type 2 Cluster of Differentiation cell preparation tube corticotrophin releasing factor C Reactive Protein C-X-C motif chemokine ligand CXC chemokine receptor damage associated molecular patterns dendritic cells Di-methyl sulfoxide Datura stramonium Agglutinin epidermal growth factor receptor Enzyme linked immuno-sorbent assay Foetal calf serum fibroblast growth factor Factor VII-activating protease N-Acetylgalactosamine granulocyte colony-stimulating factor Green fluorescence protein Gastrointestinal XII Characterization of Post-Traumatic Immunosuppression and Its Partial Reversal By Autologous Salvaged Blood Transfusion GlcNAc gp130 Hb Hct HIF HIV HLA-DR HMGB-1 HPE HRP HSP ICU IDR-peptides IFN-γ Ig ILIL-1RA IQR kDa KGF LacNAc LBP LC MS LEL LPS MARS MCP-1 MDC MDSCs MFI MHC MIP-1α MOF MSC NeuAc NFkB NHS NK NKp NLR NO NSAID NSBT PAMP PBMC N-Acetylglucosamine Glycoprotein-130 Haemoglobin haematocrit hypoxia induced transcription factor human immunodeficiency virus human leukocyte antigen - DR High-mobility group box 1 protein hypothalamus-pituitary-endocrine horseradish peroxidase Heat shock protein Intensive care unit Innate defence regulator peptides Interferon-γ Immunoglobulin Interleukin Interleukin-1-receptor antagonist inter-quartile-range kilo Dalton Keratinocyte growth factor N-Acetyl-D-lactosamine Lipopolysaccharide binding protein Liquid chromatography - Mass spectrometry Lycopersicon Esculentum (Tomato) Lectin Lipopolysaccharide Multiple-affinity removal spin Monocyte Chemoattractant Protein - 1 Myeloid dendritic cells myeloid derived suppressor cells Mean fluorescence intensity major histocompatibility complex Macrophage Inflammatory Protein - 1α Multiple organ failure mesenchymal stromal cells N-acetylneuraminic acid nuclear factor kappa-light-chain-enhancer of activated B cells National health service Natural Killer Natural killer cell precursor NOD-like receptor (nucleotide-binding oligomerization domain receptors) nitrous oxide Non-steroidal anti-inflammatory drugs No salvaged blood transfusion Pathogen associated molecular patterns peripheral blood mononuclear cells XIII Characterization of Post-Traumatic Immunosuppression and Its Partial Reversal By Autologous Salvaged Blood Transfusion PBS PD-1 PDC PE PGE2 PHA-E PHA-L PICS PTI RBC RCA-1 RFU rIFN-γ ROS RT S-100A8/A9 SAA SBS sCD14 SD SDF-1 sgp130 Siglec sIL-6 sIL-6R SIRS SNA sTNF-R TGF-β TIMP TKA TLR TMT TNF-α TSB TSG-6 UTI vCJD WBC WGA WSB β-Gal Phosphate buffered saline Programmed Cell Death - 1 Plasmacytoid dendritic cells Phycoerythrin Prostaglandin-E2 Phytohemagglutinin-Erythrocytes Phytohemagglutinin-Leukocytes persistent inflammation, immunosuppression, and catabolism syndrome Post-Traumatic Immunosuppression red blood cells Ricinus communis agglutinin - 1 Relative fluorescence unit Recombinant IFN-γ Reactive oxygen species Room temperature S100 proteins A8/A9; also called Calgranulin Serum Amyloid-A Salvaged Blood Sensitive Soluble CD-14 Standard deviation Stromal cell-derived factor-1 Soluble Glycoprotein-130 Sialic acid-binding immunoglobulin-type lectins Soluble Interleukin-6 Soluble Interleukin-6 receptor Systemic Inflammatory Response Syndrome Sambucus nigra bark lectin Soluble tumour necrosis factor receptor Transforming growth factor - beta tissue inhibitors of metalloproteinases Total Knee Arthroplasty Toll like receptor Tandem Mass Tag Tumour Necrosis Factor - α transfused salvaged blood TNF-α stimulated gene/protein 6 Urinary tract infections variant Creutzfeldt–Jakob disease white blood cells Wheat germ agglutinin wound site blood Beta-Galactoside XIV Characterization of Post-Traumatic Immunosuppression and Its Partial Reversal By Autologous Salvaged Blood Transfusion LIST OF FIGURES Chapter – I : Introduction Fig. 1.1 Coxcomb Diagram of Florence Nightingale 5 Fig. 1.2 SIRS-CARS paradigm 7 Fig. 1.3 Persistent inflammation, immunosuppression and catabolism syndrome 8-9 Fig. 1.4 CD24-Siglec-G pathway discriminates between Sterile Trauma and Infectious Sepsis 11 Fig. 1.5 Cartoon of hypothetical events following sterile trauma and infection 13 Fig. 1.6 IL-6 Classical Signalling and Trans-Signalling 25 Chapter – II : Materials and Methods Fig. 2.1 Dideco-797 recovery device for postoperative autologous salvaged blood from knee joint replacement operation site. 41 Fig. 2.2 Experimental Design 43 Fig. 2.3 Isolation of mononuclear cells using cell preparation tube 44 Fig. 2.4 Isolation of plasma using protease inhibitor tubes (P100 Tube) 46 Fig. 2.5(A) Different Steps of Flow Cytometric Bead Array 47 Fig. 2.5(B) Gating Strategy for Flow Cytometric Bead Array Technique 47 Fig. 2.6 JANUS automated liquid handling system. 51 Fig. 2.7 Depletion of proteins by MARS cartridge 54 Fig. 2.8 Schematic Diagram of Tandem Mass Tagging. 57 Chapter – III : Characterization of Post-Traumatic Immunosuppression (PTI) and the Effect of Autologous Salvaged Blood Transfusion on PTI Fig. 3.1 Damage Associated Molecular Patterns 67 – 68 Fig. 3.2 Pro-inflammatory Cytokines 69 – 70 Fig. 3.3 Anti-inflammatory Cytokines 71 - 72 Fig. 3.4 Chemokines 73 Fig. 3.5 Interleukin-22 74 Fig. 3.6 sIL-6R, sgp130, and ADAM-17 75 XV Characterization of Post-Traumatic Immunosuppression and Its Partial Reversal By Autologous Salvaged Blood Transfusion Fig. 3.7 Soluble CD14 76 Fig. 3.8 Lysozyme Activity 77 Fig. 3.9 CD-24, Siglec-10 and Siglec-2 78 Fig. 3.10 Complement C5a 79 Fig. 3.11(A-F) Biomarker Profiles of PBMCs Challenged with LPS 81 Fig. 3.11(G-H) Biomarker Profiles of PBMCs Challenged with LPS (Cont.) 82 Fig. 3.11(I-J) Biomarker Profiles of PBMCs Challenged with LPS (Cont.) 83 Fig. 3.11(K-N) Biomarker Profiles of PBMCs Challenged with LPS (Cont.) 84 Chapter – IV : Constituents of Salvaged Blood Fig. 4.1 Damage Associated Molecular Patterns 93 - 94 Fig. 4.2 Pro-inflammatory Cytokines 95 - 96 Fig. 4.3 Anti-inflammatory Cytokines 97 - 98 Fig. 4.4 Chemokines 99 Fig. 4.5 Interleukin-22 and Keratinocyte Growth Factor 100 Fig. 4.6 sIL-6R, sgp130, and ADAM-17 101 Fig. 4.7 Soluble CD14 102 Fig. 4.8 Lysozyme Activity 103 Fig. 4.9 CD-24, Siglec-10 and Siglec-2 104 Fig. 4.10 Complement C5a 105 Chapter – V : Proteomic and Glycomic Profiling of Salvaged Blood Fig. 5.1 One-Dimensional gel electrophoresis of venous and salvaged blood plasma samples. 112 Fig. 5.2 Alterations in TMT-profiles between the studied plasma samples 114 Fig. 5.3 (A) Heat map analyses on the complete proteomic profile of the study samples (No clustering). 116 Fig. 5.3 (B) Heat map analyses on individual clusters obtained from the complete proteomic map (Clusters 1 to 3) 117 Fig. 5.4 Lectin Array Data for venous and salvaged blood plasma samples from individual patient. Fig. 5.5 Heat map analyses on lectin binding specificity of venous and salvaged blood samples from individual patient. XVI 119 - 120 121 Characterization of Post-Traumatic Immunosuppression and Its Partial Reversal By Autologous Salvaged Blood Transfusion Chapter – VI : Discussion Fig. 6.1 Biomarkers to Assess PTI following Major Surgery 128 Fig. 6.2 Reversion of PTI by reinfusion of salvaged blood 128 Fig. 6.3 Radar plot of the postoperative fold changes in the biomarkers of sterile trauma; distinguishing two distinct panels of biomarkers of sterile trauma: common biomarkers and salvaged blood sensitive biomarkers 129 Fig. 6.4 Radar plot of fold changes in different biomarkers of sterile trauma in the surgical wound site and in the transfused salvaged blood; distinguishing two distinct panels of biomarkers in the transfused blood: stable biomarkers and dynamic biomarkers 133 Fig. 6.5 Radar plot of fold changes in different biomarkers of sterile trauma in the five-hourly incubated venous blood 134 Fig. 6.6 Hypotheses on the immunological responses mediated by soluble forms of CD24 and Siglec-10 140 Chapter – VII : Appendices Fig. 7.1 Effect of LPS addition on sCD-14 production by fresh PBMCs and human whole blood culture 156 Fig. 7.2 Effect of LPS addition on pro-inflammatory cytokine production by fresh PBMCs 157 Fig. 7.3 Simulated Salvaged Blood Results. Fig. 7.4 Effect of lysozyme on production of different biomarkers in human whole blood culture XVII 158 - 159 160 Characterization of Post-Traumatic Immunosuppression and Its Partial Reversal By Autologous Salvaged Blood Transfusion LIST OF TABLES Chapter – I : Introduction Table. 1.1 Lists of studies investigating the changes in Biomarker levels in the surgical wound site. 15 Table. 1.2 Lists of investigations on changes in Biomarker levels in postoperative venous blood following major surgery 22 Chapter – II : Materials and Methods Table. 2.1 Details of Biomarkers Assessed Table. 2.2 Bradford protein detection assay set-up 49 - 50 55 Chapter – III : Characterization of Post-Traumatic Immunosuppression (PTI) and the Effect of Autologous Salvaged Blood Transfusion on PTI Table. 3.1 Patient Characteristics and Haematological Information 66 Table. 3.2 Common Biomarkers of Sterile Trauma (C-BST) 86 Table. 3.3 Salvaged Blood Sensitive Biomarkers of Sterile Trauma (SBS-BST) 87 Table. 3.4 Spearman Correlation between changes in different biomarkers in NSBT 89 Table. 3.5 Spearman Correlation between changes in different biomarkers in ASBT 91 Chapter – IV : Constituents of Salvaged Blood Table. 4.1 Constituents of Salvaged Blood at One Hour (WSB) and Six Hours (TSB) After Surgery 107 Table. 4.2 Correlations on fold changes between different Biomarkers in the surgical wound site (WSB/Peripheral) 109 Table. 4.3 Correlations on fold changes between different Biomarkers during the blood collection period (TSB/WSB) 110 XVIII Characterization of Post-Traumatic Immunosuppression and Its Partial Reversal By Autologous Salvaged Blood Transfusion Chapter – V : Proteomic and Glycomic Profiling of Salvaged Blood Table. 5.1 Summary of Mass Spectrometric Analysis of the study samples 114 Chapter – VIII : Appendices Table 7.1 Levels of Biomarkers in Wound Blood Table 7.2 Levels of Biomarkers Postoperatively Following Major Surgery 147 - 150 Table 7.3 (A) Correlation Between Biomarker Levels and Length of Hospital Stay 151 Table 7.3 (B) Correlation Between Biomarker Levels and Drained Blood Volume 152 Table 7.3 (C) Correlation Between Biomarker Levels and Transfused Blood Volume 153 Table 7.4 Pre- and Post-Operative Levels of Different Biomarkers 154 Table 7.5 Levels of Different Biomarkers in Peripheral and Salvaged Blood 155 Table 7.6 Details of Biomarkers Assessed by Tandem Mass Tagging 161 - 169 Table 7.7 List of Reagents 179 Table 7.8 Cross-Reactivity of Measured Biomarkers 182 XIX 146 CHAPTER – I INTRODUCTION Chapter - I Introduction 1.1 Post-traumatic Immunosuppression Every organism, from both the plant and animal kingdoms are exposed to infections and/or different accidental or environmental injuries countless times in their life. To combat these insults, organisms have developed self-defence mechanisms that have co-evolved with that of animals and plants. Single-cellular organisms from both prokaryotes and eukaryotes develop defence mechanisms against viruses. Plants also develop defences against injuries induced by infectious pathogens, environmental damage (e.g. rain or wind) or from the activities of herbivores. Organisms in the oceans also develop defences to combat infectious pathogens or climate changes such as acidification or warming of oceanic water. The non-specific or “innate” immune system has been protecting plants and animals (both vertebrates and invertebrates) from infections for billions of years. The innate immune system is activated once there is engagement between cell surface receptors expressed by certain cell types and stimulatory molecules. The number and complexity of cell surface receptors mediating recognition by innate immune cells are limited. These receptors generally recognise common elements shared by stimulatory molecules and cannot distinguish between the bindings of different, closely related, structural compounds. The former are known collectively as “pattern recognition receptors (PRRs)”. Patterns in molecules from different pathogenic microorganisms are recognized by these PRRs but they cannot distinguish between the similar molecules expressed by different pathogens. Thus, the innate immune response is a prototypic response lacking specificity. To develop a degree of specificity in immune responses, the so-called adaptive immune system evolved. Adaptive immunity is initiated by the activation of lymphocytes whose receptors for antigen recognition are generated by somatic rearrangement of receptor-coding genes, are clonally distributed and are of exquisite specificity. In addition, because the specific immune response involves both clonal expansion and differentiation, the adaptive immune response also shows memory, the hallmark of such a response. In parallel to the body‟s response to infections, recent studies support that, following non-infectious accidental/environmental injury, the affected cells/tissues upregulate the secretion of endogenous signalling molecules that PRRs can 2 Chapter - I Introduction recognize, a phenomenon that also exists in primitive organisms. This indicates the evolutionary development of immunity to facilitate self-survival. Heat shock proteins (HSPs), as one of the ancient stress proteins, are systemically upregulated in man following trauma (Szerafin, Hoetzenecker et al. 2008). HSP are conserved among vertebrates and invertebrates (Klaenhammer, Kleerebezem et al. 2012) as well as plants (Goodnough, Brecher et al. 1999). Thus endogenous signalling molecules reflect the evolution of innate immunity. Recent investigations show that, accidental injury or other infectious- or noninfectious trauma results in initial inflammatory events followed by a transient antiinflammatory response whose function is presumably to limit collateral damage initiated by the former inflammatory response. The balance between these two events therefore directs whether the patient would be immunologically suppressed or hyperactivated following injury. This thesis will deal with a careful analysis of the responses of a group of patients to non-infectious surgical trauma. Before further deliberation on immunological responses to injury/infection, below are definitions of the frequently used terms in this thesis: 1.1.1 Definitions: 1.1.1.1 Inflammation Inflammation has many definitions. Clinical Concept – John Hunter, the father of modern surgery first described his own experiences about the medical situations of wounded soldiers in his book “A Treatise on Blood, Inflammation and Gun-Shot Wounds” (Hunter 1794). His outstanding surgical and experimental observations on “inflammation” suggested four clinical signs namely redness, heat, swelling, and pain. The terminology of “Inflammation” by Hunter had no clear understanding about the immunological responses. Additionally John‟s studies also overlooked the fact “inflammation caused by acquired infections” in the wounded subjects. Immunological Concept – Inflammation became an important term in immunology mainly since last few decades. Pro-/Anti-inflammatory paradigm is the basic concept of inflammation that reflected in balance between two opposing cytokine networks that activate/suppress immunity. 3 Chapter - I Introduction 1.1.1.2 Sterile Trauma refers to tissue damage devoid of primary wound infection, and is best exemplified by elective open surgery, for example in knee joint arthroplasty. Inflammation following sterile trauma without any exposure to microbial pathogens is termed as „sterile inflammation‟ (Chen and Nunez 2010). 1.1.1.3 Immune status is the level of appropriately targeted resistance to internal, opportunistic and external pathogenic micro-organisms, where resistance is attributable to multiple innate or acquired mechanisms located throughout the organism. There is no single measure of immune status, but rather multiple biomarkers that make up a profile relevant to efficacy of broad aspects of innate and adaptive immunity. 1.1.1.4 Post-Traumatic Immunosuppression (PTI) is the condition of suppressed immune status that follows sterile trauma. It ranges from mild to severe, where mild is exemplified by strenuous exercise and severe by immunosuppression induced by multiple extensive polytrauma or major open surgery. 1.1.2. Historical Context of PTI In 1856 Florence Nightingale, „the lady with the lamp’ drew attention to the „utter insignificance‟ of risk of dying from battle wounds acquired during the Crimean War compared to the risk of dying from subsequent zymotic (infectious) diseases acquired within the Scutari Hospital (Florence 1999). Her meticulous data collection on mortality of British soldiers, and generation of “Coxcomb Diagram” established her as one of the earliest biostatisticians. In that revolutionary diagram Nightingale reported more deaths due to zymotic diseases till March 1855 as represented in the blue colour, compared to the deaths due to wound as represented in pink colour. But, after arrival of sanitation commissions at April 1855, deaths from the zymotic diseases became dramatically reduced continuously at the following months. 4 Chapter - I Introduction Figure 1.1: Coxcomb Diagram of Florence Nightingale Nightingale‟s continuous improvements in hospital hygiene gradually reduced deaths from infectious diseases in patients with combat injuries. However more and more new infections are still threatening the battle wound patients (Murray 2008, Warkentien, Rodriguez et al. 2012). And therefore, although mortality rate in combat injury decreased accordingly with continuous advancement in research, deaths from systemic and battle wound infections are being reported even in this modern days. An important but poorly highlighted question was “why the wounded patients were acquiring systemic infections even in the hygienic environment?” Research of last two decades opened the window and “imbalanced immunity in patients following trauma” is that important factor that increases patients‟ vulnerability to acquire infections. Therefore, although sanitation has been improved in the hospitals, an equivalent phenomenon of post-traumatic deaths from systemic infections persists to this day. 1.1.3. Systemic Inflammatory response Syndrome (SIRS) In 1991 Dr Roger Bone introduced the term „Systemic Inflammatory Response Syndrome (SIRS)” to describe physiological changes common to all cases of burn or trauma, irrespective of cause. This paradigm included four physiological changes namely, increased body temperature, elevated heart rate, tachypnea or 5 Chapter - I Introduction hyperventilation, and leukocytosis or lekocytopenia (Bone, Balk et al. 1992). Until now SIRS has been the dominant paradigm adopted by clinicians worldwide, despite its obvious limitations. For example, body temperature can increase following sepsis and sterile trauma, but also after myocardial infarction, pulmonary embolism and strenuous exercise. Elevated heart rate and tachypnea can occur following sepsis and sterile trauma, but other physiological complications such as cardiac and respiratory failures, hypovolemic shock and erythropenia can also affect these parameters. On the other hand alteration in white blood cell count also can happen in different disease conditions such as heart failure, pancreatitis and burns. Five years later, Bone modified his SIRS paradigm by adding a sequel named “Compensatory Anti-inflammatory Response Syndrome (CARS)”. CARS was characterized by decrease in antigen presentation, macrophage paralysis, decrease in T-cell proliferation, increase in T-cell and dendritic cell apoptosis, and shift in the Tcell subsets from Th1 to Th2 phenotype (Bone 1996). In 2001, at the “International Sepsis Definitions Conference” SIRS-CARS paradigm was expanded to include many more signs and symptoms (Levy, Fink et al. 2003). However, these concepts fitted poorly with the immuno-functional parameters and failed to anticipate the clinical outcomes (Costa, Benedetto et al. 1989, Burton, Nicholson et al. 2004, Buvanendran, Kroin et al. 2006, Philippou, Maridaki et al. 2012, Prockop and Oh 2012). In particular, the SIRS-CARS paradigm fails to distinguish sterile trauma from sepsis. In 2011 Xiao et al proposed a modification of SIRS-CARS based on observations of “A genomic storm” in critically injured patients (Xiao, Mindrinos et al. 2011). Whereas SIRS-CARS after severe injury, conceived of initial SIRS followed by suppression of adaptive immunity (CARS), followed by a second hit leading to organ dysfunction (Fig 1.2A), their proposed paradigm (Fig 1.2B) conceived of immediate induction of pro- and anti-inflammatory cytokine genes involved in innate immunity and suppression of genes of adaptive immunity. Xiao rejected the “second hit phenomenon” and further hypothesized that these delayed recovery in patients who have complicated clinical outcomes was due to prolonged imbalanced immunity. 6 Chapter - I Introduction A Figure 1.2 : SIRS-CARS paradigm and proposed paradigm by Xiao et al (Xiao, Mindrinos et al. 2011). SIRS: Systemic Inflammatory Response Syndrome; CARS: Compensatory Anti-inflammatory Response Syndrome. (A) SIRS-CARS paradigm leading to death following severe sepsis and injury; a consequence of initial overproduction of pro-inflammatory mediators that leads to endothelial and tissue damage and thus multiple organ failure. After survival following this initial SIRS phase, a CARS phase results in the suppression of adaptive immunity. A second insult to these patients such as injury/surgery/nosocomial infection results may lead to recurrent SIRS, called the „„second-hit‟‟. (B) Proposed model of simultaneous induction of both proinflammatory and anti-inflammatory genes involved in innate immunity whereas suppression of the genes involved in adaptive immunity. 7 Chapter - I Introduction Xiao et al‟s paradigm was derived from studying injured patients in a multicentric study where all the post-injury collected samples varied from one to twelve hours after injury. Furthermore, gene expression data did not necessarily reflect levels of active proteins. Nonetheless they showed elevations in Interleukin-6 (IL-6), Interleukin-1 receptor antagonist (IL-1RA), Interleukin-8 (IL-8) and Monocyte chemoattractant protein-1 (MCP-1) (Xiao, Mindrinos et al. 2011). Another concept is termed as “persistent inflammation, immunosuppression, and catabolism syndrome” (PICS) (Gentile, Cuenca et al. 2012). Trauma or sepsis induces an immediate release of myeloid derived suppressor cells (MDSCs) from the bone marrow which populates the haemopoietic organs and suppresses both proliferation and function of T-cells (Makarenkova, Bansal et al. 2006, Gentile, Cuenca et al. 2012). Poor nutritional status, delayed wound healing and increased susceptibility to infections are associated with protein loss for a prolonged period following surgical trauma with a persistent low grade inflammation accompanying imbalanced immunity (decreased T-cell proliferation, decreased functional capacity of macrophages and T-cells, and increased MDSCs) as shown in Figure 1.3 (Gentile, Cuenca et al. 2012). However, this concept was based mostly on animal models. It would be important to see whether preventing the suppressive functions of MDSCs and/or inhibiting the protein catabolism by nutritional therapies would benefit the immune-compromised patients following sterile trauma or sepsis. A 8 Chapter - I Introduction B Figure 1.3 : Persistent inflammation, immunosuppression, and catabolism syndrome – proposed by Gentile (Gentile, Cuenca et al. 2012). Following the initial insult (sepsis/trauma) simultaneous SIRS-CARS events in patients resulted in the longer hospital stay of the patients in ICU with controllable organ dysfunctions; however patients met no established criteria for late multiple organ failure. These patients experienced protein catabolism, poor wound healing and recurrent infections. Patients had persistent low-grade inflammation with defects in their innate and adaptive immune system. These defects included: macrophage paralysis, persistent increased myeloid derived suppressor cell numbers, decreased effector T-cell number and function. 1.2. Distinguishing Sterile Trauma from Sepsis One of the key unanswered questions at the present time in the field of inflammation research is how to distinguish PTI induced by sterile trauma from that induced by sepsis. In a recent publication Savage et al analysed the secretory capacity of glial cells stimulated with different Damage Associate Molecular Patterns (DAMPs; to mimic the sterile trauma condition) as well as the Pathogen Associated Molecular Pattern (PAMP) molecule such as LPS (to mimic sepsis). Differences were seen in the secretions of IL-1β by the cells: increased if stimulated by PAMPs but unchanged if stimulated by DAMPs. However, secretion of IL-6 and CXCL-1 were identical in both situations (Savage, Lopez-Castejon et al. 2012). This study thus highlighted the differences in cellular responses following sterile versus non9 Chapter - I Introduction sterile activation and open new avenues to investigate the consequences of inflammasome activation on these processes. Johnson et al also showed significant variations in the gene expression profile of whole blood cells taken from patients with sterile trauma versus early sepsis (Johnson, Lissauer et al. 2007). Results obtained highlighted numerous genes that were preferentially increased in early sepsis. These unique genes could be subdivided into four broad categories namely: innate immunity, cytokine receptors, T helper cell differentiation, and protein synthesis (Johnson, Lissauer et al. 2007). Although their study built a platform for future understanding the distinction between sterile trauma and sepsis, gene expression analysis needed to be confirmed at the protein levels with additional proteomic studies. Liu et al distinguished certain differences between sterile trauma and sepsis (Liu, Chen et al. 2009). Thus, following sterile trauma, secreted DAMPs made a trimolecular complex with the membrane bound CD24 molecule and the transmembrane glycoprotein sialic-acid binding immunoglobulin type lectin-10 (Siglec10). This complex then inhibits TLR/NLR-mediated inflammation. In contrast, following microbial infections, both PAMPs and released DAMPs interact with TLR/NLR mediated inflammatory reactions. This is due to pathogen encoded sialidase enzyme that prevents the interaction between the DAMPs/CD24 pair and Siglec-10; thereby preventing the formation of tri-molecular complex (Chen, Tang et al. 2009, Liu, Chen et al. 2009, Chen, Chen et al. 2011). These in vivo mouse models and in vitro human studies need to be validated in a clinical setting. CD24 and Siglec-10 are also present in the circulation as soluble molecules. Figure 1.4 schematically represents the mechanisms of membrane bound CD24 and Siglec-10 in sterile and infectious situations. 10 Chapter - I Introduction Figure 1.4: CD24-Siglec-G pathway discriminates between Sterile Trauma and Infectious Sepsis. This is a schematic diagram to describe how sepsis and sterile trauma can be distinguished. Following injury, DAMPs make complex with CD24 which then bind to Siglec-10. This tri-molecular complex can then inhibit TLR-NFkB mediated inflammatory activities. However, in presence of microbes, PAMPs from microbes and DAMPs from the host both bind to the TLR/NLR receptors thereby promoting inflammation. Pathogen encoded Sialidase enzyme that can block the binding between CD24 and Siglec-10 thereby stop the immunosuppressive mechanism. 11 Chapter - I 1.3. Introduction Immunological changes following sterile trauma Sterile trauma involves both local and systemic responses representing a complex balance between pro- and anti-inflammatory mediators. Numerous studies have described the immune pathways in relation to sterile trauma (Flohe, Flohe et al. 2008, Chen and Nunez 2010, Rock, Latz et al. 2010). Briefly, at the trauma site, there is an immediate release of endogenous danger signals named damage associated molecular patterns (DAMPs) which increases local production of different cytokines, chemokines, and other soluble factors by resident cells. Subsequently, via DAMPs and chemokines, there is further recruitment of neutrophils, monocytes and mesenchymal stromal cells (MSC) into the local site of inflammation (McDonald, Pittman et al. 2010, Shi and Pamer 2011, Han, Jing et al. 2012, Kolaczkowska and Kubes 2013). These newly recruited cells differentiate locally into cells secreting predominantly anti-inflammatory cytokines (Arnold, Henry et al. 2007, Han, Jing et al. 2012). Additionally, neutrophils and monocytes in the injured site are guided by DAMP induced inflammasomes to play a role in apoptosis/necroptosis/NETosis and controlled clearing of damaged tissues (Kaczmarek, Vandenabeele et al. 2013). DAMPs also trigger the release of IL-6 that plays important role in hypothalamuspituitary-endocrine (HPE) axis to release steroids and in turn triggers the release of other immunosuppressive mediators to control inflammations at the wound. IL-6 also induces hepatocytes to release acute phase proteins to mediate post-traumatic antiinflammatory activities. All the cells and soluble factors at the inflamed site contribute to tissue remodelling and wound healing (Chen and Nunez 2010, Rock, Latz et al. 2010). Although the above concept is established, the systemic manifestations of sterile trauma are poorly described and not clearly distinguished from the sequel of events following sepsis. In case of sepsis, PAMPs from microorganisms and endogenous release of DAMPs, both trigger the inflammatory activities at the site of infection. Role of IL-6 in sepsis is not distinguishable from that in sterile trauma. Sepsis may accelerate differentiation of local/recruited immune cells into inflammatory phenotype or delayed apoptosis; whereas in sterile trauma there may be an evolutionary control on this events. This control of local inflammation following sterile trauma may be facilitated by CD24/Siglec-10 mediated immunosuppressive pathways and also by other yet unknown mechanisms. 12 Chapter - I Introduction Figure 1.5 schematically describes the sequel of events following sterile trauma and sepsis. Figure 1.5: Cartoon of hypothetical events following sterile trauma and infection. Immediate release of endogenous danger signals also called DAMPs trigger the release of a panel of chemokines and cytokines in the injured site. This leads to the recruitment of immune cells to the site of tissue injury from the reservoirs bone marrow and spleen as well as from the circulation. On the other hand injury triggers the release of IL-6 that stimulates the HPE axis to release corticotrophin releasing hormone which in turn releases ACTH and subsequently cortisol. Cortisol plays important role in elevating the levels of IL-6, IL-RA, IL-8 and IL-10 in blood. Additionally, IL6 also triggers the release of acute phase proteins by the liver, which also plays immunosuppressive role in the site of injury. The recruited immune cells plays their role accordingly to favour apoptosis, phagocytose the damaged tissue, and also triggers the proliferation and differentiation of the appropriate immune cells to favour local wound healing. Following Infections, pathogen associated molecular patterns from the microbes and endogenous DAMPs play the similar role as previously described. However, importantly, the recruited immune cells at the site of infection may take longer time due to delayed apoptosis leading to inflammation in the infected area. 1.3.1. Local Site of Trauma 1.3.1.1. Skin injury Human skin acts as a physical barrier against foreign microbial infections, aided by local production of antimicrobial peptides (AMP). Keratinocytes and resident cells of the innate immune system reduce the epidermal microbial load 13 Chapter - I Introduction following transactivation by epidermal growth factor EGF which triggers the release of AMPs (Sorensen, Thapa et al. 2006). Injury to the skin results in immediate haemostasis, followed by infiltration of neutrophils and macrophages and simultaneous production of cytokines such as interleukin-6 (IL-6) and IL-8 (Sjogren and Anderson 2009). IL-6 plays a role in fibroblast proliferation, collagen deposition and angiogenesis. Interestingly, a strong correlation exists between local IL-6 concentrations and the speed of wound healing (Lin, Kondo et al. 2003). 1.3.1.2. Muscle injury Factors released by damaged muscles activate resident inflammatory cells, which release chemotactic agents that signal circulating inflammatory cells to infiltrate the damaged muscle. Subsequently, inflammatory cytokines are produced locally. Damage to muscle results in increased production and secretion of IL-1β and TNF-α, which triggers increased secretion of IL-6 and subsequent recruitment of neutrophils to the injured tissue (Hashizume, Higuchi et al. 2011, Philippou, Maridaki et al. 2012). 1.3.2. Ischemia-Reperfusion injury Major orthopaedic surgery is frequently carried out under tourniquet, creating tissue hypoxia which following tourniquet release gives rise to ischaemia-reperfusion injury to tissues. A key component of a cell‟s response to hypoxia is up-regulation of hypoxia-induced-transcription-factor (HIF) expression (Kaelin and Ratcliffe 2008). In hypoxic conditions, increasing HIF and Toll like receptor (TLR) signalling synergistically activate the NFkB pathway thereby triggering recruitment of monocytes, phagocytosis, release of IL-18, TNF-α and DAMPs (Kuhlicke, Frick et al. 2007). HIF also inhibits apoptosis of recruited neutrophils at the site of injury thereby prolonging their lifespan (Eltzschig and Carmeliet 2011). However, HIF upregulation in T-cells stimulates IL-10 production, inducing a shift from inflammatory Th1 phenotype to anti-inflammatory Th2 phenotype (Eltzschig and Carmeliet 2011). Hypoxia increases adenosine levels, which regulates innate immunity and controls inflammation (Ohta and Sitkovsky 2001). Following tourniquet release, reperfusion injury may also enhances the expression of inflammatory cytokines such as IL-17 14 Chapter - I Introduction that facilitate further recruitment of leukocytes to the site of injury (van Golen, Reiniers et al. 2013); however DAMP driven immunological responses may direct to anti-inflammatory events to facilitate the healing. A literature review of studies showed considerable variations in the levels of different soluble mediators in thesurgical wound site (1 to 48 hours after surgery; collection time-point varied between studies) comparing with the preoperative venous levels. This is summarized in Table 1.1 with more extensive results as shown in Appendix-I. There is general agreement that increased levels of IL-1, IL-4, IL-6, IL-8, IL-10, TNF-α, PGE2 and complement proteins- C3 and C5 were seen postoperatively. Table – 1.1: Lists of studies investigating the changes in biomarkers levels in the surgical wound site. Biomarker Type Proinflammatory Cytokines Antiinflammatory Cytokines Chemokines Others Biomarker Name IL-1β IL-2 IL-6 * IL-12 IL-17 IFN-γ TNF-α IL-4 IL-5 IL-10 IL-13 IL-1RA IL-8 MCP-1 MIP-1α PGE2 sIL-6R C3 C5 Platelet No. of Investigations Changes in wound site biomarker levels relative to pre-operative baseline levels Decrease No Change Increase N.D. 1 1 4 2 1 1 1 1 4 1 1 1 1 1 - 10 24 6 2 3 2 12 1 2 7 4 4 1 0 - Total No. of Studies 13 1 24 1 1 1 10 3 1 5 1 2 12 1 1 2 1 7 4 8 * IL-6 is a cytokine which recently has been described as an anti-inflammatory cytokine. Please see page 25 15 Chapter - I Introduction 1.3.3. Hypothalamus - Pituitary - Endocrine axis The response to sterile trauma involves activation of the hypothalamus-pituitaryendocrine (HPE) axis and subsequent changes in different hormonal levels. There are complex functional inter-relationships between HPE and the immune system. Upon trauma, corticotrophin releasing factor (CRF), a hypothalamic releasing substance secreted by the anterior pituitary gland, immediately stimulates the release of adrenocortico-tropic-hormone (ACTH) (Burton, Nicholson et al. 2004). ACTH rapidly stimulates production of glucocorticoid cortisol. The production of ACTH following trauma overrides cortisol-dependent ACTH down-regulation, ultimately resulting in continuous increases of both ACTH and cortisol (Burton, Nicholson et al. 2004). Secretion of inflammatory cytokines such as IL-1, IL-6 and TNF-α has impacts on the HPE-axis (Besedovsky, del Rey et al. 1991). 1.3.3.1. Prostaglandin E2 (PGE2) Following sterile injury, PGE2, the breakdown product of arachidonic acid, also plays an important role in immunological responses (Buvanendran, Kroin et al. 2006). By shifting the Th1 to Th2 balance, PGE2 inhibits hyper-inflammation and promotes tissue repair (Gilroy, Colville-Nash et al. 1999, Fukunaga, Kohli et al. 2005, Wallace 2006). PGE2 crosses the blood-brain barrier to stimulate the thermoregulatory centre responsible for febrile reactions associated with trauma (Hamzic 2013). 1.3.4. Changes in Lympho-haemopoiesis Increases in the number of neutrophils, monocytes, and MSCs in blood reflect recruitment of these cells from extra-vascular compartments (spleen and bone marrow) after sterile injury (Seebach, Henrich et al. 2007, Tsou, Peters et al. 2007, McDonald and Kubes 2011). In contrast, depending on the degree of injury, reduction in the levels of red blood cells (RBC) and lymphocytes are seen (Kimura, Shimizu et al. 2010). Effects of trauma on individual cell types are briefly discussed below: 16 Chapter - I Introduction 1.3.4.1. Neutrophils During sterile trauma, neutrophils egress from the extra vascular spaces into the circulation to be recruited to the site of injury. This neutrophil egression is facilitated by the CXC chemokine receptors CXCR-4 and CXCR-2 (Suratt, Petty et al. 2004). CXCR-4 ligands are involved in retaining neutrophils in the bone marrow, but CXCR-2 ligands inhibit CXCR-4 dependant retention thereby encourages egress (Suratt, Petty et al. 2004, McDonald and Kubes 2011). Granulocyte colonystimulating factor (G-CSF) also helps in the mobilization of neutrophils by altering the balance between ligation of CXCR4 and CXCR2 (Suratt, Petty et al. 2004). Sentinel neutrophils in peripheral blood can also be rapidly recruited to the site of injury (Arancibia, Beltran et al. 2007, Kolaczkowska and Kubes 2013). By their interaction with different damage-associated molecular patterns (DAMPs), these sentinel cells release different inflammatory cytokines and chemo-attractants which recruit additional neutrophils to the inflammatory site (Williams, Azcutia et al. 2011, Kolaczkowska and Kubes 2013). Ubiquitin, an endogenous CXCR4 agonist, also released following trauma and burn, indicate a natural defence by controlling the extent of neutrophil release from the bone marrow to the site of injury (Majetschak, Zedler et al. 2008, Majetschak 2011). 1.3.4.2. Monocytes/Macrophages The mechanisms involved in the egression of monocytes from the bone marrow to the injury site are still poorly understood. In mouse, Tsou et al illustrated the recruitment of Ly-6+ monocytes from the bone marrow into the circulation by a CCR-2 mediated pathway (Tsou, Peters et al. 2007, Shi and Pamer 2011). Additional investigation suggested the spleen as another reservoir for monocyte recruitment to damaged tissues (Swirski, Nahrendorf et al. 2009). Importantly, emigration of monocytes from the bone marrow to the injured site is independent of neutrophil recruitment (Henderson, Hobbs et al. 2003). Furthermore, decreased expression of HLA-DR by circulating monocytes was also found in patients following trauma, major surgery and burns (Hensler, Hecker et al. 1997, Kimura, Shimizu et al. 2010). 17 Chapter - I Introduction 1.3.4.3. NK cells Functional activity of natural killer (NK) cells as a first line responder of innate immunity is decreased following traumatic injury (Blazar, Rodrick et al. 1986, Gharehbaghian, Haque et al. 2004). Number of CD16+CD56+ NK cells was decreased one day after surgery and decrease was reported even after one week following knee joint replacement surgery (Munoz, Cobos et al. 2006). Gharehbaghian et al also showed significant suppression of NKp frequencies at fifth postoperative days following joint replacement surgery; however the exact CD phenotype of that NKp was not determined (Gharehbaghian, Haque et al. 2004). 1.3.4.4. Dendritic Cells and other Antigen Presenting Cells Antigen presenting cells (APC) such as dendritic cells (DC) interacts with lymphocytes to trigger adaptive immunity. Kawasaki et al reported decreased antigen presentation capacity by splenic DC in mice following trauma/haemorrhage associated with decreased expression of MHC class II, IL-12 and IFN-γ (Kawasaki, Fujimi et al. 2006). Total number of DCs although showed transient increase after surgery, decreased at postoperative day 2-3 (Ho, Lopez et al. 2001). Recent studies showed decreased myeloid DC (MDC) but no change in plasmacytoid DC (PDC) 3 to 5 days after surgery (Henrich, Maier et al. 2009). MDCs may possibly have been recruited to the surgery site. Circulating MDCs but not PDCs were shown by Maier et al to undergo apoptosis with overall increases in the expression of anti-apoptotic markers (Maier, Geiger et al. 2009). Several studies in DCs from circulating blood showed increased expressions of genes for chemotaxis including CCL5, CXCL5 and CXCL4, anti-apoptosis (such as TIMP-1, BCL2), and inflammation (such as NF-kB) (Maier, Wutzler et al. 2008, Maier, Geiger et al. 2009, Maier, Geiger et al. 2009, Geiger, Maier et al. 2013). These may indicate a role for DC in the recruitment of innate immune cells at the injury site. 1.3.4.5. Myeloid derive Suppressor Cells (MDSCs) MDSCc are a mixed cell populations originated from the myeloid origin and are able to suppressing T cell responses. Numbers of CD14+ APC cells were found to be significantly elevated following surgery for at least 24 hours with relatively more increases in CD16+, CD80+, and CD86+ APCs (Albertsmeier, Quaiser et al. 2014). 18 Chapter - I Introduction More importantly, there was a massive increase in the number of CD14+HLADRmyeloid derived suppressor cells (MDSCs) (Filipazzi, Valenti et al. 2007), which may be involved in immunosuppression following trauma (Cuenca, Delano et al. 2011). However, future phenotypic and functional studies are needed to confirm the subtype of these CD14+ APCs and their role in trauma induced immunological responses. 1.3.4.6. Lymphocytes A significant decrease in total CD3+ T-lymphocytes following trauma is associated with shifting from Th1 to Th2 phenotype mediated by regulatory T-cells (Hensler, Hecker et al. 1997, Marik and Flemmer 2012). Albertsmeier et al showed decrease in counts for CD3+, CD4+ and CD28+ T-cells immediately after surgery and no changes in CD8+ T cell subsets; whereas increased CD4+CD25+CD127regulatory T-cells (Tregs cells) that are involved in shifting from Th1 to Th2 phenotype (Albertsmeier, Quaiser et al. 2014). They hypothesized that, suppression of T-cells following trauma is associated with increased Tregs cells and MDSCs (Albertsmeier, Quaiser et al. 2014). In vitro stimulation studies also showed reduced secretion of IFN-γ, IL-2 and TNF-α by postoperative T-cells (Hensler, Hecker et al. 1997). On the other hand, Munoz et al showed no postoperative changes in CD19+ B lymphocyte counts from first postoperative day until seventh (Munoz, Cobos et al. 2006). 1.3.4.7. Eosinophils and Basophils Postoperative eosinophil counts greatly decline and then return to baseline after two days (Roche, Thorn et al. 1950). Decreases may be associated with the increased ACTH secretions through signalling by the HPE-axis (Roche, Thorn et al. 1950, Burton, Nicholson et al. 2004). Basophils also decreased one day after surgery and returned to normal at day five and there is significant release in histamines (Laroche, Chrysanthou et al. 1992). However, phenotypic changes eosinophils and basophils following major surgeries are poorly documented. 19 Chapter - I Introduction 1.3.4.8. Mesenchymal Stromal Cells Recent investigation showed increased numbers of circulatory mesenchymal stromal cells (MSC) in the peripheral blood of burn and trauma patients (Mansilla, Marin et al. 2006, Seebach, Henrich et al. 2007). There appears to be a direct correlation between the proliferation rate of cultured bone marrow MSCs from patients with multiple traumas and trauma severity of their (Seebach, Henrich et al. 2007). How MSC egresses from bone marrow and are recruited to the injury site remains unclear. 1.3.5. Changes in blood plasma Alteration in soluble biomarkers in blood plasma following trauma are briefly outlined below. 1.3.5.1. Cytokines Complex changes in the levels of different cytokines occur after trauma. The most common changes are in IL-6. Miller et al showed a post-traumatic decrease of IL-2, IFN-γ, and IL-12 levels, whereas IL-10 and IL-4 levels were increased. This was associated with a shift from Th1 to Th2 T-cell responses (Miller, Rashid et al. 2007). A comprehensive list of 109 investigations at different postoperative time periods is summarized in Table-1.2 and further detailed Appendix-II. 1.3.5.2. Chemokines Increased chemokines play important roles in the recruitment of mononuclear phagocytic cells from the BM and spleen reservoirs to the site of injury (Gale and McColl 1999). IL-8/CXCL-8 rises transiently following surgery; but drops back to baseline within few days. Table 1.2 and Appendix Table II reported postoperative changes in chemokines such as IL-8, MCP-1 and MIP-1α following surgical insults. 1.3.5.3. Damage Associated Molecular Patterns (DAMPs) DAMPs, also called endogenous danger factors or alarmins, are a class of molecules that play vital role in the recruitment of immune cells to the site of injury with increase in the production of chemo-attractants and cytokines. DAMPs are released at the wound site during the trauma period and examples include HMGB-1, S100 proteins, heat shock proteins and α-defensins (Manson, Thiemermann et al. 20 Chapter - I Introduction 2012). DAMPs in the venous blood would help better characterization of posttraumatic immunity, but are still poorly understood. Table 1.2 summarizes postoperative changes in DAMPs studied to date. 1.3.5.4. Other Soluble factors The levels of haemoglobin and haematocrit drop following major surgery (Khurana, Zafar et al. 2012) possibly due to the blood loss, haemodilution, inflammation and other reasons . Complement activation produces such as C5a and C3a increase post-operatively (Burk, Martin et al. 2012). Release of histones and nucleosomes from the damaged cells allows factor VII-activating protease (FSAP) to trigger complement pathway and generation of C5a (Kanse, Gallenmueller et al. 2012). Soluble CD-14, a marker of monocyte activation increases following surgery (Bastian, Tamburstuen et al. 2011); whereas decreases reported in soluble IL-6 receptor (sIL-6R) (Kristiansson, Soop et al. 1998) and soluble gp-130 (Corbi, Rahmati et al. 2000). In knee arthroplasty Munoz et al showed decreased levels of different immunoglobulins (IgG, IgA, and IgM) at six hours and remained persistently low for at least three days (Munoz, Cobos et al. 2006). Individual human beings do not respond equally to surgical trauma/stress due to variations in soluble factors result of genetic polymorphisms in the promoters of cytokine genes (Stuber, Klaschik et al. 2005, Johnson, Lissauer et al. 2007) as well as other factors such as race, age, and obesity (Haider, Chang et al. 2008, Silber, Rosenbaum et al. 2012). A comprehensive summary of published literature describing post-operative changes in the concentrations of different cytokines, chemokines, and DAMP, is presented in Appendix - II, and a summary in Table 1.2. At the most frequently used time-point, namely 24 hour, changes are summarized as follows: 87 out of 88 studies showed a consistent post-operative increase in IL-6; in one study IL-6 was undetectable. No increases were shown in 17% studies of IL-8, 30% studies of IL-10 and 27% studies of IL-1RA. But in the remainder studies all were increased. For IL-1β, IL-4, IL-12, IL-13, IL-17, IFN-γ, TNF-α, and MCP-1, most studies showed no post-operative changes. Decreased IL-2 was shown in 54% (7/13) studies decreased and in 4 studies there was no change. 21 Chapter - I Introduction IL-5 and MIP-1α were unchanged in 50% of studies; although there were only 4 studies for IL-5 and 2 for MIP-1α. There were only study found for IL-22 and soluble IL-6 Receptor (sIL-6R) each. IL-22 was increased whereas decreases shown in sIL-6R levels. For sCD14, all three studies reported postoperative increase. HMGB-1 showed elevations in five studies; whereas one study showed no change. HSP-27 was studied and showed unchanged by one group. HSP-70, reported by two groups, also showed no postoperative changes. Only one study on HSP-60 found and was decreased. Table 1.2: Lists of investigations on changes in biomarker levels in postoperative venous blood following major surgery Biomarker Type Biomarker Name No. of Investigations Postoperative Changes (1 day) Also see Supplementary Table II Decrease No Change Increase N.D. IL-1β IL-2 IL-6 * ProIL-12 inflammatory IL-17 Cytokines IFN-γ TNF-α IL-22 IL-4 AntiIL-5 inflammatory IL-10 Cytokines IL-13 IL-1RA IL-8 Chemokines MCP-1 MIP-1α HMGB-1 DAMPs HSP-27 HSP-60 HSP-70 Others sIL-6R sCD-14 3 7 2 1 5 1 1 1 1 - 21 4 5 1 6 23 4 2 12 4 3 7 7 1 1 1 2 - 3 1 87 1 0 6 1 2 2 28 8 31 2 5 3 5 1 1 1 5 2 - Total No. of Studies 32 13 88 8 2 7 39 1 7 4 40 4 11 40 9 2 6 1 1 2 1 3 * IL-6 is a cytokine which recently has been described as an anti-inflammatory cytokine. Please see page no. 25 22 Chapter - I Introduction 1.3.6. Changes in Liver 1.3.6.1. Acute Phase protein synthesis Liver releases positive acute phase proteins (APP) after trauma. IL-6 stimulates hepatocytes to release APPs such as C Reactive Protein (CRP), Serum Amyloid-A (SAA), Activated Protein-C, and alpha-1-antitrypsin (Heinrich, Castell et al. 1990, Gabay and Kushner 2001, Jawa, Anillo et al. 2011). Elevated APPs stimulate productions of cytokine antagonists such as IL-1RA and soluble TNF-receptors, thereby eventually resulting in immune-suppression and favouring wound healing (Tilg, Dinarello et al. 1997, Gabay and Kushner 1999). Although APPs were initially thought to have only pro-inflammatory activities, recent studies suggest that their role following trauma is predominantly anti-inflammatory (Tilg, Dinarello et al. 1997, Arredouani, Kasran et al. 2005). 1.4. Repairing Injured Tissue During human evolution, the body has developed protective mechanisms to repair tissues damaged by injury. These repair mechanisms involve complex interactions between several cellular systems. Initially, there is a response involving cells and components of the immune system. Endothelial cells helps in immediate recruitment of additional cells from the circulation into the injured tissues through extravasation. Subsequently, recruitment of cells from BM and spleen occurs. These systemic effects also impact the liver hepatocytes that partake actively in the tissue repair process by releasing APPs. These different aspects are briefly outlined below. 1.4.1. Cells activation triggers Both local and recruited neutrophils and monocytes thus play important roles in initial injury as well as in facilitating the tissue repair mechanisms. Neutrophils phagocytose cellular debris and by their oxidative or proteolytic activities are involved in removing damaged tissue (Tidball 2005, Sadik, Kim et al. 2011). Additionally, neutrophils secrete different proteases one of whose activities is to alter basement membrane proteins, thereby promoting cell recruitment to the injury site (Sadik, Kim et al. 2011). 23 Chapter - I Introduction By their ability to secrete different growth factors and cytokines, monocytes and macrophages play a vital role in injury and repair. Firstly, as showed by Arnold et al (Arnold, Henry et al. 2007), recruited inflammatory monocytes in the injury site may differentiate to other monocyte phenotypes, favouring tissue repair. In CX3CR1/GFP+ mice whose CX3CR1 gene was replaced by a green fluorescent protein (GFP) reporter gene, only pro-inflammatory CX3CR1lo/Ly-6Chi monocytes (CD14hiCD16- monocytes in human) were recruited from the blood into the site of injury. Their study also illustrated that, at the injured site, these inflammatory CX3CR1lo/Ly-6Chi monocytes proliferated and differentiated initially into antiinflammatory CX3CR1hi/Ly-6Clo cells (CD14loCD16+ monocytes in human) and later differentiated into F4/80hi macrophages (Arnold, Henry et al. 2007). Depletion of monocytes and neutrophils in animals also results in a weak tissue repair process (Teixeira, Zamuner et al. 2003). Eyerich et al (Eyerich, Eyerich et al. 2009) showed involvement of Th22, a subset of T-cells, in the tissue repair processes where fibroblast growth factor (FGF) expressed by Th22 cells acted synergistically with TNF-α in epidermal repair. However, because most of these studies were carried out in animals, the exact mechanisms in humans remain enigmatic. 1.4.2. Soluble Factors Chemoattractants, in addition to their essential role in the recruitment of neutrophils and monocytes to the injured site (Gillitzer and Goebeler 2001, Chen and Nunez 2010), also have local site-specific functions. Keratinocytes express IL-8 receptors, and both in vitro and in vivo studies demonstrate that IL-8 stimulates the migration and proliferation of keratinocytes at the injury site (Gillitzer and Goebeler 2001). The role of different cytokines in tissue repair has also been studied (Philippou, Maridaki et al. 2012). Briefly, DAMPs, chemokines and pro-inflammatory cytokine such as IL-6 help the recruitment of immune cells after initiation of injury. There is subsequent upregulation and production of anti-inflammatory cytokines such as IL10, IL-1RA, TGF-β which by inhibiting the release of pro-inflammatory cytokines, ultimately favour tissue repair (Hogevold, Lyberg et al. 2000, Jawa, Anillo et al. 2011, Philippou, Maridaki et al. 2012). IL-6 was found to be down-regulated by the 24 Chapter - I Introduction secretion of IL-10, IL-1RA and sTNF-R released at the wound site resulted in IL-6 down-regulation (Ostrowski, Rohde et al. 1999). Although in many studies IL-6 was thought to be a pro-inflammatory cytokine, recent studies have shown two signalling pathways activated through IL-6 (Figure 1.6). The first is the so-called “classic” signalling mechanism, where by binding with its membrane bound receptors on immune cells, IL-6 plays anti-inflammatory activities. In contrast, the IL-6 “trans-signalling” mechanism, where IL-6 binds to a soluble IL-6R, results in pro-inflammatory activities (Rose-John, Scheller et al. 2006, Rose-John 2012). ADAM-17 is an enzyme whose function is to shed membrane bound IL-6R and thus converting them into sIL-6R. ADAM-17 is therefore involved in homeostasis by balancing soluble and membrane bound forms of IL-6R (Briso, Dienz et al. 2008, Rose-John 2012). Whether ADAM-17 levels are altered following trauma has not yet been characterized. However, the observations of massively elevated IL-6 and reduction in the levels of soluble IL-6 receptor at the surgical wound site (Kristiansson, Soop et al. 1998) suggest that IL-6 at the injury site may be predominantly anti-inflammatory, thereby favouring wound healing. Figure 1.6: IL-6 Classical Signalling and Trans-Signalling (adopted from Rose-John ) 25 Chapter - I Introduction When applied to the wound site, exogenous Keratinocyte growth factor (KGF) has role as a stromal mediator for the proliferation of epithelial cells (Finch, Rubin et al. 1989) and therefore is involved in wound healing (Geer, Swartz et al. 2005). The tissue protective/regenerative role of KGF has been described elsewhere (Panoskaltsis-Mortari, Taylor et al. 2000). Recent studies showed IL-22 to be involved in tissue repair although the mechanisms underlying its role are still unclear (Ren, Hu et al. 2010, Kumar, Rajasekaran et al. 2013, McGee, Schmidt et al. 2013). Together with overexpression of different endogenous danger signals such as defensins and S-100 proteins at the site of injury, elevated levels of IL-22 and KGF might play synergistic roles in tissue repair (Kumar, Rajasekaran et al. 2013) 1.4.3. MSC, the warden of tissue repair Immunosuppression at the injured site is required to reduce tissue damage induced by inflammation and promotes tissue remodelling. Interestingly, the inflammatory environment helps MSCs become activated and to trigger their immunosuppressive functions. Prockop et al has mentioned the role of MSCs in regulating injury induced inflammation (Prockop and Oh 2012) where activated MSC unregulated the expression of the anti-inflammatory cytokine IL-1RA. Activated MSCs also inhibit the secretion of different inflammatory cytokines such as IFN-γ, TNF-α, IL-1α, or IL-1β by inhibiting the NFkB pathway and secreting TNF-α stimulated gene/protein 6 (TSG-6) (Han, Jing et al. 2012, Prockop and Oh 2012). DAMPs, nitrous oxide (NO), and other related factors produced from the damaged tissues, activate MSCs via the PGE2 dependant pathway (Prockop and Oh 2012). By differentiation into other cellular phenotypes such as chondrocytes and osteoblasts, MSCs play a role in tissue remodelling. In addition, by supporting the proliferation of fibroblasts, epithelial cells, neutrophils, and macrophages, MSC play a predominantly positive role in tissue repair (Han, Jing et al. 2012). Although many gaps in our understanding prevail, an outline is emerging of multiple mechanisms that restrain inflammation and suppress systemic immunity (Medzhitov 2008). Suppression of immunity in moments of crisis would appear to 26 Chapter - I Introduction have conferred no evolutionary advantage to mammals; but, without such restraints healing would be delayed by activation of tissue destructive inflammatory cascades. 1.5. Aggravating Factors of PTI PTI can be aggravated by many different biological factors, some of whom are briefly outlined below: 1.5.2. Ageing One biological factor aggravating PTI is immune-senescence. Elderly patients have weak immunity and are therefore more vulnerable to infections (Ginaldi, Loreto et al. 2001, Aw, Silva et al. 2007). Zacks et al previously showed relatively slower muscle regeneration and decreased phagocytic activities by the inflammatory cells from the older animals (Zacks and Sheff 1982). 1.5.3. Haemorrhage Haemorrhage is another important aggravating factor which results in immunosuppression even without any major tissue trauma and may increase susceptibility to acquire infections (Stephan, Kupper et al. 1987). By releasing proinflammatory cytokines IFN-γ and IL-2 in vitro with enhanced production of IL-10 by T-cells, haemorrhage may lead to PTI (Abraham and Chang 1992). 1.5.4. Blood Transfusions Blood transfusion, a necessary step following surgery, due to major blood loss, also aggravates PTI. Transfusion of allogeneic blood or packed red blood cells, and pre-deposited autologous blood transfusion promote the progression of PTI (Gharehbaghian, Haque et al. 2004, Gong, Thompson et al. 2005, Silverboard, Aisiku et al. 2005, Karam, Tucci et al. 2009). 1.5.5. Other aggravating factors There are many other factors that can aggravate PTI. Surgery itself is a major trigger of physical stress (Hogan, Peter et al. 2011). In addition, factors such as presurgical medications and anaesthesia showed a direct association with the degree of surgical stresses (Kawasaki, Ogata et al. 2007). Immune responses following trauma is also gender specific. Males are more prone to be immunosuppressed following 27 Chapter - I Introduction trauma/injury than females. This may be due to the differences in hormonal activities (Angele and Faist 2002). Use of immunosuppressant drugs such as corticosteroids, cyclosporin-A, and anti-TNFα also depress patients‟ immunity and therefore may increases their susceptibility to acquire infections (Hansen, Rohr et al. 1988, GeaBanacloche, Opal et al. 2004, Ali, Kaitha et al. 2013). 1.6. Immunological consequences of PTI The human body has developed different mechanisms to protect it from infectious threats. However, research in the last few decades has found that following surgical trauma, PTI represents a major risk to patients making them more vulnerable to acquired infections (Shorr and Jackson 2005, Faruquzzaman 2011). Different forms of nosocomial infections may occur in the immunocompromised patient in different body compartments (Rabinowitz and Caplan 1999). But respiratory tract infections are most frequent, followed by urinary tract infections, wound infections, and blood stream infections (Richards, Edwards et al. 2000). Furthermore, patients may acquire infections with multi-drug resistant bacteria that are resistant to most antibiotics (Alanis 2005). In extreme situations, PTI may eventually lead to severe sepsis, multiple organ failure, and death. 1.6.2. Pneumonia Hospital-acquired pneumonia (HAP) is the most common amongst all the nosocomial infections. Pneumonia although mostly caused by gram negative bacteria, it can also be manifested with infections by other bacteria and viruses. Multicentre studies on medical-surgical patients in intensive care units and on patients who acquired infections in ICU revealed the highest episodes of pneumonia; most of which were ventilator associated (Ponce de Leon-Rosales, Molinar-Ramos et al. 2000, Richards, Edwards et al. 2000). Therefore, following surgery associated immunocompromised state, patients vulnerability increases to acquire pneumonia. 1.6.3. Urinary tract infections (UTI) This form of infection mostly affects the bladder; however can also affect kidney, ureters, and urethra. UTI is another common infection in hospital caused by bacteria that enter the urethra and then the bladder. UTI is the second leading cause 28 Chapter - I Introduction in ICU patients and it is mostly associated with the urinary catheterization (Richards, Edwards et al. 2000). Major surgery most often requires the usage of urinary catheters; therefore increases the chance of UTI. 1.6.4. Wound infections Accidental injury patients may acquire wound infection immediately at the injury site. Patients may acquire infection at the surgical wound site also after major invasive surgery. Study on 42,509 infected surgery patients (with infections in one or more site) stated that wound site is the most common site to acquire infections (Horan, Culver et al. 1993). 1.6.5. Alimentary tract infections Gastrointestinal (GI) tract is another important compartment in our body where infections are often reported following injuries such as blunt trauma and invasive abdominal surgeries. Infections in GI tract also can be manifested with injuries in spleen, pancreas, and duodenum. Compared to invasive surgery, blunt abdominal trauma reported more severe cases of abscess from alimentary infections (Ivatury, Zubowski et al. 1988, GOINS, RODRIGUEZ et al. 1990). 1.6.6. Bloodstream Infections Bloodstream infections are also common nosocomial infections in hospital particularly from Staphylococcus Aureus and coagulase-negative staphylococci. This infection can spread in blood stream by several ways; especially intravenous resuscitation line that is required in the trauma patients (Civetta, Hudson-Civetta et al. 1996). Bloodstream infection may also be generated as secondary infection followed by site specific infections, the possibility varies depending on the infection site (Horan, Culver et al. 1993). Later consequence of this infection may lead to sepsis. In vitro studies by Angele et al described endotoxin-induced suppression of monocytes after trauma (Angele and Chaudry 2005). 1.6.7. Others Another possible consequence of PTI is metastatic spread of cancer cells. As shown in mice with mammary carcinoma, anaesthesia and blood loss are associated with increased frequency of metastases. By decreasing the numbers and functional 29 Chapter - I Introduction capacity of NK cells, PTI increases the mortality and cancer recurrence in colorectal, breast, head and neck, and lung cancer patients (Hogan, Peter et al. 2011, Veenhof, Sietses et al. 2011). 1.7. Treatment of PTI Considering all the above events following sterile trauma and the resulting immunosuppression, there has been increasing interest over the last decade in the use of immunostimulants to prevent PTI before, during, or after surgical trauma. Commonly used immunostimulants can be either functional nutrients or immunotherapeutic agents. 1.7.2. Nutritional supplements Pre-existing malnutrition has a great impact on clinical outcome, and proper nutritional support helps to reverse PTI. Immunonutrients prescribed pre-, intra-, and/or post-operatively can help to prevent post-surgical immunosuppression and include: glutamine, arginine, n-acetyl cysteine, branched-chain amino acids, glucan, nucleotides, long-chain n-3 fatty acids, antioxidant vitamins, trace elements, and taurine (Stechmiller, Childress et al. 2004, Kudsk 2006, Calder 2007, Helminen, Raitanen et al. 2007, Zheng, Li et al. 2007). Patients treated with probiotics may also get substantial benefit to have healthy immunity following trauma (Klaenhammer, Kleerebezem et al. 2012) 1.7.3. Immunotherapy Strategies to modulate patients‟ immunity for better clinical outcome are mostly confined to drugs to prevent overwhelming inflammatory reactions following so-called SIRS. However, without knowing the underlying mechanisms of sepsis or sterile trauma, treatment with drugs may aggravate and thus worsen the clinical situations. This is reflected in the failure of many different clinical trials (Hotchkiss, Monneret et al. 2013, Boomer, Green et al. 2014). Immunotherapeutic agents include: anti-PD1, mifamurtide, polyinosinic-polycytidylic acid, MF-59, imiquimod, luivac, myrrh, IDR-peptides, IL-7, rIFN-γ, IL-15, TNF-α antagonist (Scanzello, Figgie et al. 2006, Hancock, Nijnik et al. 2012, Hotchkiss, Monneret et al. 2013, Hutchins, Unsinger et al. 2014). 30 Chapter - I 1.8. Introduction Autologous Blood Transfusion; Types of transfusion Autologous blood transfusion is the collection of blood from a person and re- infusing back to the same person when required. This is in contrast to allogeneic blood transfusion where blood from one or more unrelated donor is transfused to the recipient. Autologous transfusion was initially proposed by Blundell in 1818, as a potentially life-saving method for patients who had an immense bleeding and has been established as a safe alternative to allogeneic transfusion since 1980 (Blundell 1819, Vamvakas and Pineda 2000). 1.8.2. Advantages of autologous transfusion Primary concerns about allogeneic transfusions arose from the transmission of viral infection including: hepatitis viruses, cytomegalovirus, human immunodeficiency virus (HIV), and diseases such as blood borne transmission of variant Creutzfeldt–Jakob disease (vCJD) (Goodnough, Brecher et al. 1999, Rosencher, Kerkkamp et al. 2003, Llewelyn, Hewitt et al. 2004, Andreas Pape 2007). To some extent viral load can be reduced by leuko-depletion of the blood. Allogeneic transfusion can result in decreased helper T-cell counts, decreased CD4/CD8 T-cell ratio, decreased lymphocyte responses, decreased natural killer (NK) cell functions, reduction in delayed-type hypersensitivity, defective antigen presentation, decreased productions of IL-2 and IFN-γ, and decreased monocyte/macrophage phagocytic functions (Eleftherios and Morris 2007, Vamvakas, Bordin et al. 2009). The advantages of autologous transfusion are : minimization of transfusion transmitted infections; reduction of transfusion related non-haemolytic reactions; avoidance of sensitization to uncommon blood types; emotional benefits to patients who trust their own blood; and reduction in trauma-induced inflammation (Bierbaum BE 2000, Borghi B 2000, Rosencher N 2003); absent of cross-matching requirements; and a viable alternative for patients who refuse allogeneic transfusion for religious reasons (e.g. Jehovah‟s Witnesses) (Dainow 1991, Newman JH 1997) 31 Chapter - I Introduction 1.8.3. Pre-operative deposit of autologous blood This type of transfusion involves blood collected into ACD-anticoagulant from the patients 2-3 weeks before surgery and reinfused to the patients after surgery. After leukodepletion, separation of red blood cells and plasma from the whole blood units, and classifying it according to the ABO and Rh systems, blood can be faithfully re-allocated to the donor (Schleinzer and Singbartl 1997, Ajit Walunj 2006, Andreas Pape 2007). However, screening test of preoperative deposited autologous blood unit is a pre-requisite prior to reinfusion likewise allogeneic blood. 1.8.4. Normovolaemic Haemodilution Acute normovolemic haemodilution (ANH) is the immediate pre-operative removal of blood into ACD and concurrent infusion of plasma expander to maintain intravascular volume. ANH is an option for patients who are able to tolerate the acute lowering in haemoglobin concentrations and blood lost during the surgery has a lower haematocrit thereby reducing loss of RBC. The removed blood is reinfused during or after surgery (Schleinzer and Singbartl 1997, Ajit Walunj 2006, Andreas Pape 2007). 1.8.5. Intra-operative salvage Intraoperative autologous transfusion is a method whereby blood lost into the operative field is collected sterilely, washed, filtered and then reinfused as a packed unit of RBCs (Schleinzer and Singbartl 1997, Andreas Pape 2007). Intraoperative blood transfusion is performed during surgical procedures where significant blood loss is expected. Patients with multiple red blood cell antibodies or rare blood types benefit by blood salvaged during surgery. 1.8.6. Post-operative salvage Blood is salvaged postoperatively by collection of blood from the surgical wound drains into a bag and re-infused with or without washing (Schleinzer and Singbartl 1997). Postoperative salvaged blood transfusion is performed if there is significant blood loss after the surgical procedure. 32 Chapter - I Introduction Blood collected into either heparin or ACD anticoagulant may be washed with isotonic saline solutions using specialist equipment to remove the plasma proteins; with simultaneous removal of some leukocytes and platelets (Ashworth and Klein 2010). Only relatively pure erythrocytes are re-infused and all plasma, platelets and leukocytes from the wash fluids is discarded. The simplest and most widely practiced technique is to use nonanticoagulated, defibrinated salvaged blood. Postoperative blood collected under negative pressure. After 6-8 hours this fibrinolysed blood is reinfused into the patient through a standard 40µ blood filter. A less commonly used vibrant technique is collecting blood into acid-citrate dextrose (ACD) anticoagulant, the most widely used anti-coagulant. However sodium citrate, citrate phosphate dextrose, or heparin can also be used in appropriate proportions (Lemos and Healy 1996). 1.8.7. Advantages of postoperative salvage Several studies confirmed that post-operative salvage blood transfusion reduced the requirements for allogeneic blood transfusion (Gannon DM 1991, DC Ayers 1995, Nuttall GA 1996, D. Thomas 2001, ON Nagi 2003, Steven and William 2003, Jones HW 2004, Pillonel J 2004, Horstmann, Slappendel et al. 2010, Matsuda K 2010). Whereas, popularity of preoperative autologous blood donation has decreased due to wastage following unexpected postponement of surgery as well as high collection and storage costs (Etchason, Petz et al. 1995, Billote DB 2002, Goldman M 2002, Steven and William 2003), and intra-operative salvage involves costly tools, and skilled staff and is therefore less cost effective (Guerra JJ 1995), postoperative salvage does not require expert workforce or additional complex equipment, unless salvaged blood is washed, in which case specialist washing machines (e.g. haemonatics) are required that increases the cost (Rao, Dyga et al. 2012). Reinfusion of salvaged blood has raised some concerns. Fibrinolytic activity in the surgical site and systemic circulation increased after re-infusion of postoperative unwashed salvaged blood (Krohn, Reikerås et al. 2001, Matsuda K 33 Chapter - I Introduction 2010); however such changes have not led to major clinical complications. Complement activation and negligable erythrocyte haemolysis (<1%) after incubating salvaged blood for 24 hours confirms its efficacy and safety (Dalén T 2002). Umlas showed that postoperatively collected red blood cells from drains have a life span similar to normal intravenous erythrocytes (Umlas, Jacobson et al. 1993). Febrile reactions occur in some patients (Faris PM 1991, Clements, Sculco et al. 1992, Dalén T 1996); however, Faris et al confirmed this mainly occurred in patients who had reinfusion of blood collected between 6 and 12 hours post-operatively (Faris PM 1991). 1.9. Total Knee Arthroplasty (TKA) and postoperative salvaged blood transfusion Knee replacement, or knee arthroplasty, is a major surgical procedure to replace the weight-bearing joint with a man-made prosthesis to relieve the pain and disability of osteoarthritis, rheumatoid arthritis and psoriatic arthritis. With the continuous advancement in the surgical procedure, more and more patients are receiving the benefits of TKA (Deirmengian and Lonner 2008, Lee and Goodman 2008). As allogeneic blood transfusion transports well-known infection risks other procedures has been introduced ranging from preoperative deposited autologous transfusion to postoperative salvaged blood reinfusion (Peter VK 2001, Sarah, Francesco et al. 2003, Jones HW 2004, Martin A 2006, A. Zacharopoulos 2007, Moonen, Knoors et al. 2007, Matsuda K 2010). Postoperative salvaged blood transfusion following knee arthroplasty is an easier, more cost effective technique, less infection during hospital stay, safe and convenient for both doctors and patients (Muñoz, Ariza et al. 2005, Muñoz, Slappendel et al. 2011, Muñoz, Campos et al. 2013). In this study knee arthroplasty offered an opportunity to characterise PTI initiated by sterile surgical trauma. Gharehbaghian et al previously reported that arthroplasty induced post-operative depression of circulating NKp cells; this being further exacerbated by allogeneic or pre-deposited-autologous blood transfusions with or without leukodepletion. They also observed that when arthroplasty was 34 Chapter - I Introduction followed by re-infusion of unwashed ACD anti-coagulated salvaged blood collected during the first six hours after surgery, NKp cell frequencies rose above pre-operative levels and remained high for at least five days after surgery. Enhanced immune status was reflected in increased Interferon-gamma (IFN-γ) synthesis and macrophage activation, suggesting constituents within salvaged blood reversed PTI (Gharehbaghian, Haque et al. 2004, Islam, Whitehouse et al. 2011). These results were supported by other studies showing enhanced post-operative immunity following acute normovolaemic haemodilution involving re-infusion of freshly collected ACD-anti-coagulated autologous venous blood (Yan, Chen et al. 2005, Chen, Zhang et al. 2007). 35 Chapter - I Introduction 1.10. Knowledge Gaps at the time of Project Design During the period of study design, there were gaps or controversies in scientific knowledge in the published literature such as: i. Continuous synthesis of soluble plasma factors by live cells in blood lead to inaccurate scientific interpretations on biomarker levels (Ayache, Panelli et al. 2006). Immediate separation of plasma from cells in whole blood was not specified in most of the published investigations. ii. PTI cannot be assessed by measuring one or two biomarkers. However, most studies measured very few biomarkers, most with similar functional properties such cytokines, coagulation features, complement factors, or chemokines. iii. Soluble DAMPs in venous or wound site were not measured in most studies; and interactions between DAMPs and other biomarkers are poorly discussed. iv. Most studies characterized PTI in very few patients hence limiting clinical significance of findings. v. Autologous blood transfusion is common in patients undergoing elective surgery, but its effect on post-surgical immunity is poorly studied. vi. The constituents of autologous salvaged blood in sterile trauma are poorly investigated. 36 Chapter - I Introduction 1.11. Study Aims and Hypotheses 1.11.2. Aim 1: To characterise PTI after total knee arthroplasty using biomarkers with various functional properties including cytokines, chemokines, DAMPs, and others. Hypothesis 1: Postoperative levels of biomarkers with various functional properties characterize PTI. 1.11.3. Aim 2: To characterise the effects of ACD anti-coagulated salvaged blood on PTI. Hypothesis 2: ACD-anticoagulated salvaged blood transfusion reverses PTI. 1.11.4. Aim 3: To analyse body‟s immunological responses at the surgical wound site. Hypothesis 3: Biomarker profiles in wound blood reflect in-vivo changes within the trauma site. 1.11.5. Aim 4: To analyse and identify the immunostimulatory plasma constituents in the ACD anti-coagulated salvaged blood. Hypothesis 4: Immune stimulants are generated ex-vivo during collection of salvaged blood. 37 Chapter – II MATERIALS AND METHODS Chapter - II Materials and Methods 2.1. Study Design Between 2010 and 2011 the study was established as a tri-institutional collaboration between Institute of Technology Tralee, NUI Galway in Ireland and University of Bristol in United Kingdom by Prof Benjamin Bradley. The study plan involved patient recruitment, hospital data collection, sample collection, processing and cryopreservation. This was done in Orthopaedic Research Unit, Avon Orthopaedic centre, Southmead Hospital, University of Bristol, United Kingdom, where the primary total knee arthroplasty patients were recruited. The second part of this study was laboratory based research that were carried out in Immunology and Transplant Biology Research Unit, Regenerative Medicine Institute, NUI Galway, Ireland, and a small part of the study was also carried out in Shannon Applied Biotechnology Centre, Institute of Technology Tralee, Ireland. 2.2. Ethical approval This clinical study was fully approved by the local NHS research ethics committee (Ref. No. 10/H0102/8) and informed consent was obtained from all volunteers (Appendix-X). Patients were interviewed and informed about this study by the respective surgeons. If they agreed to take part, the voluntary consent was signed. 2.3. Patient Selection and Recruitment Sample size was determined by our previous observation that 39 out of 40 patients who received salvaged blood showed evidence of reversal of PTI. A total of 43 patients undergoing primary total knee arthroplasty from the daily operation schedule were recruited. Patients undergoing revision arthroplasty, those with preexisting infections, previous blood transfusion, malignant disease, autoimmune disorders, and diabetes were excluded. Study patients had the following characteristics: 70% were female and 30% male; median age was 74 (56 - 86) years; primary diagnosis was osteoarthritis (41), rheumatoid arthritis (1), or psoriatic arthritis (1). Non-steroidal anti-inflammatory drugs (NSAID) were given preoperatively to seven patients. 39 Chapter - II Materials and Methods No more than two knee arthroplasty patients were selected for each day. I was available twenty-four hours in the hospital to process blood samples of different time points immediately after collection, thereby avoiding the effects of storage time on changes in the levels of different biomarkers. 2.4. Haematological and Biochemical Data Both preoperative (before anaesthesia) and post-operative (prior to discharge from hospital) haematological information were collected from each patient including haemoglobin level and haematocrit (Hct), red blood cell (RBC) count, platelets, white blood cells (WBC), neutrophils, monocytes, lymphocyte, eosinophils, and basophils. Biochemical parameters such as sodium, potassium, urine, and creatinine levels were also recorded pre- and post-operatively. Clinical information such as patient demographics, underlying disease states, surgical procedures, disease history, length of hospital stay, drained blood volume, transfusion requirements were also documented. 2.5. Blood Transfusion Procedure All patients had a drain inserted subcutaneously into their wound site which was attached to a „Dideco-797 Recovery Device‟ (Sorin Group Ltd.) through which a rotary pump applied negative pressure. Salvaged blood was collected from the surgical wound via a suction catheter, which has two lumens, one to aspirate blood from the surgical wound site, and another to deliver acid citrate dextrose (ACD), to act as anticoagulant for the blood aspired from the site of bleeding (Figure 2.1). Anticoagulation through Dideco-797 device was carried out as a ratio of 1:12 for ACD anti-coagulant: salvaged blood. ACD-A formulation was: acid-citratemonohydrate, 4.0 g; sodium-citrate-dihydrate, 11.0 g; glucose monohydrate, 12.25 g; total H2O volume, 500 ml; pH 4.7 – 5.3. After six hours, or after total volume reached 500 ml, the blood collection bag contents were re-infused via a 40 micron blood transfusion filter (Dideco Micro- 40-Goccia. Sorin group), without further washing or manipulation. Assignment to the two study cohorts was determined by the volume of blood drained from the wound site within the first six hours after surgery. If total fluid volume accumulated within six hours was greater than 175 ml. 40 Chapter - II Materials and Methods it was re-infused; lesser volumes being discarded, except in two patients where all fluid was discarded for clinical reasons; these two being assigned to the nontransfused cohort. In all cases fluid salvaged beyond six hours was discarded. No study patient received allogeneic or autologous pre-deposited blood transfusions. Those 25 patients who received autologous salvaged blood were termed the ASBT cohort, the median transfused volume at six hours after surgery being 360 (175-550) ml. For comparison 18 patients received no salvaged blood transfusions and were termed the NSBT cohort. Figure 2.1: Dideco-797 recovery device for postoperative autologous salvaged blood from knee joint replacement operation site. A tube (1) is inserted into the joint space during the operation, where it removes fluid from the wound site through negative pressure exerted by a rotary pump (2). After exiting the wound site the tube is connected to a smaller diameter tube (3) that delivers acid citrate dextrose to the fluid from the reservoir (4). The anticoagulated fluid is then pumped via the rotary pump (2) to the collection bag (5), which is subsequently reinfused into the patient through another tube (6). 41 Chapter - II Materials and Methods 2.5.1. Sampling of blood from patients Venous blood samples were collected from each patient of both NSBT and ASBT cohorts at two different periods; the first (hereafter termed “preoperative”) before anaesthetic procedure and the second (hereafter termed “postoperative”) immediately prior to discharge from the hospital, ranging between two and six days (median day 3). Part of the preoperative blood was incubated at room temperature for five hours for simulation studies. In the ASBT cohort, ACD anticoagulated salvaged blood samples from the collection bag were taken at two time points, the first, one hour after surgery (hereafter termed “wound site blood” or “WSB”) and the second, six hours after surgery prior to reinfusion (hereafter termed “transfused salvaged blood” or “TSB”). Preoperative samples were collected by the clinician in the anaesthetic room of theatres at Avon Orthopaedic Centre, Southmead Hospital. Postoperative samples were taken after transfer to designated wards. Seven patients were excluded from this study as I could not collect the post-operative samples due to different reasons. Two patients were discharged from the hospital without informing the research group and five patients refused to be bled again. Blood collections and other related procedures are described in the next sections. A schematic diagram of the experimental design is in Fig 2.2. 42 Chapter - II Materials and Methods Figure 2.2: Experimental Design 43 Chapter - II Materials and Methods 2.5.2. Blood Sample Collection, Isolation of Plasma Venous blood samples were collected in cell preparation tube (CPT tube; Beckton Dickenson) containing citrate anticoagulant and a blood separation system composed of a polyester gel and a density interface forced by density gradient fluid on top of the gel barrier. During centrifugation the gel portion moves to form a barrier separating the mononuclear cells and plasma from other dense blood components. Figure 2.3: Isolation of mononuclear cells using cell preparation tube Citrated blood tubes were centrifuged at 1800 g for 25 minutes at RT. Plasma samples were then collected from the top of the tube without disturbing the immediate lower portion containing the mononuclear cells (Figure 2.3). Plasma samples were aliquoted in colour coded, pre-labelled (in cryotag) 0.5 ml Eppendorf tubes followed by immediate freezing at -800C. Strict sterile standard operating procedures were maintained for every step from isolation of plasma and peripheral blood mononuclear cells (PBMC) to cryopreservation. 44 Chapter - II Materials and Methods 2.5.3. Separation and storage of PBMC The mononuclear cells from the CPT tubes were transferred to 15 ml tube, washed twice with sterile PBS, and 1 ml of complete culture medium (CCM) was added to re-suspend the cells which were then counted. Freezing medium containing di-methyl-sulfoxide was added drop-wise to an equal volume of the cell suspension. The cell suspension was dispensed into pre-cooled cryovials (pre-labelled) by placing them on crushed ice. Cryovials were then placed in a sample freezing box (MrFrosty) and stored at -800C. 2.6. Cell culture of stored PBMCs Cryovials were thawed by placing in 370C water bath. Thawing medium was gradually added dropwise whilst mixing gently. This cell suspension was slowly transferred to a 15 ml tube containing complete culture medium (CCM), then mixed gently to allow DMSO to diffuse out of the cells. Following centrifugation at 400 x g for 10 minutes, supernatant was discarded and the pellet was washed and resuspended in 1 ml of CCM. Number of viable cells were counted using trypan blue. For in vitro experiments, briefly, PBMCs from pre- and post-operative venous blood from NSBT and ASBT cohorts were suspended in culture medium (RPMI-1640, 10% FCS, and L-Glutamine at 2mM), and adjusted to 1x106 viable cells/ml. Lipopolysaccharide (LPS) endotoxin was added (3 ng/ml) to half the cells. Following incubation for three days at 370C in 5% CO2 /N2, supernatants were collected and stored at -800C for further biomarker analysis. 2.7. Blood collection for proteomic and glycomic analysis Part of the citrated blood was also immediately transferred to another tube named “P100 tube (Beckton Dickenson)” to inhibit proteolysis in blood. P100 tube contains proprietary protease inhibitor cocktails. During centrifugation, the integrated mechanical separator in the tube moved down and placed the cells beneath it whereas the plasma portion remained on the top of the separator (Figure 2.4). Blood plasma was then isolated from P100 tube and aliquoted in pre-labelled Eppendorf tubes. The aliquots were stored at -800C. 45 Chapter - II Materials and Methods Figure 2.4: Isolation of plasma using protease inhibitor tubes (P100 Tube) 2.8. Flow Cytometric Bead Array Ready-to-use human flow cytometric bead array kits were selected that were capable of measuring the following 13 cytokines simultaneously: Interleukin-1-beta (IL-1β), IL-2, IL-4, IL-5, IL-6, IL-9, IL-10, IL-12p70, IL-13, IL-17A, IL-22, Tumour Necrosis Factor-alpha (TNF-α), and Interferon–gamma (IFN-γ). Plasma samples were assayed in 96 well plates and read by flow cytometer (Accuri-C6, BD) according to manufacturer‟s protocol (BMS817FF, e-Bioscience). In brief, each cytokine was measured by a pair of antibodies; one being a specific antibody coated onto beads, and the other being a Biotin-conjugated secondary antibody in solution. Plasma samples were incubated in this mix, beads were washed, and StreptavidinPhycoerythrin (PE) solution added. Cytokine-specific bead populations were differentiated by bead size (small versus large), and by internal pre-labelling with different intensities of fluorescent dye. Mean fluorescence intensity (MFI) of the Biotin-Streptavidin-PE complex reflected individual cytokine levels in plasma, quantitated from serially diluted known standards (Fig.2.5). 46 Chapter - II Materials and Methods Fig. 2.5(A) : Different Steps of Flow Cytometric Bead Array Fig. 2.5(B) : Gating Strategy for Flow cytometric Bead Array Technique. There were two sizes of beads: small (4 μm; consisting of 5 indicator populations; lower left display) and large (5 μm; consisting of 6 indicator populations; lower right display). Bead populations were distinguishable based on their respective APC fluorescence intensities. Cytokine concentrations were dependent on bead PE fluorescence intensity. 47 Chapter - II Materials and Methods 2.9.Enzyme linked immuno-sorbent assay (ELISA) ELISA kits to measure the following: interleukin-1 beta (IL-1β), IL-2, IL-6, IL-10, IL-12p70, IL-13, IL-17A, IFN-γ, TNF-α, IL-8, Macrophage Chemoattractant Protein-1 (MCP-1 or CCL2), Macrophage Inflammatory Protein-1-alpha (MIP-1α or CCL3), IL-12p70 (protein subunit 70kDa), IL-1 Receptor antagonist (IL-1RA), Transforming Growth Factor - β1 (TGF-β1), Heat Shock Proteins (HSP-27, HSP-60, HSP-70), Annexin-A2, Complement Factor 5a (C5a), Keratinocyte Growth factor (KGF), soluble CD-14 (sCD-14), soluble IL-6 receptor (sIL-6R), ADAM-17, soluble gp-130 (sgp-130) were purchased from R&D Systems, UK. Briefly, flat-bottomed 96-well Nunc-MaxisorpTM plates were coated with capture antibody diluted in PBS overnight. The following morning, plates were washed in 0.05% Tween-20 in PBS. Plates were blocked in 1% BSA in PBS for 1 hour prior to being washed in 0.05% Tween-20 in PBS. Standards and pre-diluted samples were added to the plate for 2 hours. Plates were washed in 0.05% Tween-20 in PBS followed by coating with biotin-labeled detection antibody diluted in 1% BSA/PBS for 2 hours. Plates were washed in 0.05% Tween-20 in PBS prior to the addition of streptavidin-horseradish peroxidase (HRP) diluted in 1% BSA in PBS for 20 minutes in the dark. Plates were washed in 0.05% Tween-20 in /PBS. Tetramethylbenzidine substrate was added for 20 minutes. Stop solution (2N sulfuric acid) was added and the absorbance was read at 450 nm on a Wallac 1420 Victor3TM Multilabel Counter plate reader (Perkin Elmer, Waltham, MA, US). Finally, levels of different analytes were determined by comparison with known standards. High-Mobility Group Box-1 (HMGB-1) was purchased from IBL International; Calgranulin (S-100A8/A9) and α-Defensin from Hycult Biotech; CD24, Siglec-10, and Siglec-2 from USCN Life Science Inc, USA. These ELISA kits were used according to manufacturer‟s instructions. Briefly, pre-diluted samples and serially diluted standards were added to the capture antibody coated ready to use 96 well plates, followed by subsequent steps as mentioned in the kit manuals. Complete lists of all the studied biomarkers are given at Table 2.1. Crossreactivity of each measured biomarker listed in Appendix-XV. 48 Chapter - II Materials and Methods Table-2.1 : Details of Biomarkers Assessed. Category Damage Associated Molecular Patterns (DAMPs) Name High-Mobility Group Box-1 (HMGB-1) a Mobilizes immunosuppressive MSCs; (Lotfi, Eisenbacher et al. 2011) suppresses IFN-γ secretion; enhances inhibitory Tcells;(Wild, Bergmann et al. 2012) dampens autoimmunity. (Wild, Bergmann et al. 2012) Calgranulin Antimicrobial; chemotactic for leukocytes(Ryckman, Vandal et al. 2003); protects against LPS induced septic shock. (Goyette and Geczy 2011) (S-100 A8/A9) a Heat Shock Proteins a: and HSP-70 Upregulates IL-10; (Borges, Wieten et al. 2012, van Eden, van Herwijnen et al. 2013) suppresses IL-1β production. (Xie, Chen et al. 2002) Alpha-Defensin (α-defensin) a Antimicrobial; increases anti-inflammatory cytokine, and chemokine production. (Lehrer 2007) Annexin-A2 a Induces pro-inflammatory mediators.(Swisher, Khatri et al. 2007) Interleukin-8 (IL-8/CXCL8) a Neutrophil recruitment. (Kolaczkowska and Kubes 2013) Monocyte Chemotactic Protein-1 (MCP-1/CCL2)a Monocyte recruitment. (Shi and Pamer 2011) Macrophage Inflammatory Protein-1alpha (MIP-1α/CCL3) a Recruits immature dendritic cells; (Deshmane, Kremlev et al. 2009)induces pyrexia. (Soares, Figueiredo et al. 2009) Interleukin-1 beta (IL-1β) a,b Key mediator of inflammatory responses; essential for resistance against pathogens; exacerbates tissue damage. (Dinarello 2009) Interleukin-2 (IL-2) a,b Pleiotropic cytokine driving T-cell growth; augments NKcell activity; induces differentiation of T-reg cells.(Liao, Lin et al. 2011) Interleukin-6 (IL-6) a,b * Pro-inflammatory if bound to soluble receptor (sIL-6R); anti-inflammatory when in free form;(Rose-John 2012) induces corticosteroid production; induces antiinflammatory acute phase proteins.(Jawa, Anillo et al. 2011) Interleukin-12 protein subunit-70 (IL-12p70) a,b Induces IFN-γ production; drives activation and differentiation of T-cells.(Gee, Guzzo et al. 2009) Interleukin-17A (IL-17A) b With TNF-α enhances neutrophil chemotaxis.(Griffin, Newton et al. 2012) Interferon-gamma Antiviral; induces proliferation and differentiation of cytotoxic T-cells.(Dinarello 2000) HSP-27, HSP-60, Chemokines Proinflammatory Cytokines Properties (IFN-γ) b Tumour necrosis factor – alpha (TNF-α) a,b Facilitates extravasation of leukocytes to injury site; synergizes with IL-1β to trigger inflammatory cascades.(Dinarello 2000) 49 Chapter - II Materials and Methods Category Name Interleukin-22 (IL-22) a Plays role in tissue regeneration (Zenewicz and Flavell 2011) Interleukin-4 (IL-4) b Similar functions to IL-13. (Wynn 2003) Interleukin-5 Activates B-cells; enhances allergic responses.(Takatsu, Kouro et al. 2009) (IL-5) Antiinflammatory Cytokines Properties b Interkeukin-9 (IL-9) b Activates mast cells; promotes T-reg cells; induces TGF-β1 production; suppresses IL-12.(Noelle and Nowak 2010) Interleukin-10 (IL-10) a,b Synergizes with IL-4, IL-13, and TGF-β1 to suppress inflammatory cascades induced by IL-1β and TNFα.(Dinarello 2000) Interleukin-13 (IL-13) a,b Pleotropic cytokine; activates Th2 cells and allergic B-cells; potent mediator of tissue fibrosis. (Wynn 2003) Interleukin-1 Receptor Antagonist (IL-1RA) a Blocks activity of IL-1β. (Dinarello 2009) Transforming growth factor beta 1 (TGF-β1) a Inhibits inflammatory cascades; (Oh and Li 2013)induces IL-9 production by T-cells.(Noelle and Nowak 2010) Soluble Interleukin-6 Receptor (sIL-6R) a Binds to soluble IL-6 to trigger inflammatory cascades through trans-stimulation. (Rose-John 2012) sgp130 a Binds to IL-6/IL-6R complex and therefore inhibits the trans-stimulation (Rose-John 2012) ADAM-17 a Helps in shedding of membrane bound form of IL-6R into soluble form (sIL-6R) and thus helps in trans-stimulation (Rose-John 2012) Soluble CD-14 a Shows antimicrobial activities by inhibiting LPS mediated shock (Haziot, Rong et al. 1995) Lysozyme a Show antimicrobial activities CD24 a Binds to different released DAMPs in the injury site and helps in immunosuppressive activities (Chen, Tang et al. 2009) Siglec-10 a Binds to DAMPs/CD24 complex and facilitates local immunosuppression (Chen, Tang et al. 2009) KGF a facilitates wound healing (Geer, Swartz et al. 2005) C5a a increase migration and adherence of neutrophils and monocytes to vessels walls and many other biological functions (Manthey, Woodruff et al. 2009) Others a ELISA, b Flowcytometric Bead Array * IL-6 is a cytokine which recently has been described as an anti-inflammatory cytokine. Please see page 25 50 Chapter - II 2.10. Materials and Methods Human whole blood culture assay Human blood culture assay was performed as described by Yaqoob et al with some modifications (Yaqoob, Newsholme et al. 1999). Briefly, preservative free heparinised blood samples were diluted 10 times in RPMI-1640 and cultured for 0, 6, 12, 24, and 48 hours with or without lipopolysaccharide (LPS) stimulation (1 and 10 ng/ml) at 370C in 5% CO2/N2. No antibiotics were used in the culture. Supernatants were stored in -800C. Levels of sCD14, IL-1β, and TNF-α were measured in the supernatants by ELISA. 2.11. Automated Liquid Handing An automated robotic liquid handling system (JANUS Automated Workstation; Perkin Elmer) was used to analyze the level of different cytokines secreted by PBMCs with or without LPS stimulation. The JANUS liquid handler is equipped with VersaTip technology that allows to equip each needle with a disposables tip or to use it as a fixed tip. The JANUS dispensing technology is based on liquid displacement. All aspiration and distribution steps were done by moving internal system liquid columns. WinPREP-JANUS software coordinated all liquid handling steps, vacuum steps and gripper movements used in the automated sample preparation. To obtain best results, instrument settings (volumes, vacuum grade and arm movements) were optimized. This system helped to minimize inter-assay variations, and human error in repetitive procedures with large number of assays. Figure 2.6 : JANUS automated liquid handling system. 51 Chapter - II 2.12. Materials and Methods High abundant protein depletion from blood plasma 2.12.1. Importance of Depletion The extensive composition of plasma proteins represents the plasma proteome. Blood circulation within different organs and tissues causes addition of new proteins, removal of some proteins, or modification of active proteins depending on specific physiological or pathological conditions (Liotta, Ferrari et al. 2003, Petricoin and Liotta 2003, Petricoin and Liotta 2003, Chan, Lucas et al. 2004, Cristea, Gaskell et al. 2004, Lathrop 2005). Blood plasma proteins can represent most of the major categories of proteins. Plasma proteome is therefore a source to identify diagnostic markers and therapeutic targets for many human diseases (Anderson NL 2004, Lathrop 2005). Human „plasma proteome‟ is distinctive from „plasma proteins‟ that provides complete identification and categorization of every single plasma protein in particular highly specified analytical forms. Due to alternative splicing and post-translational modifications, proteome is dynamic and much more complex than the genome; therefore proteome is a rich source of potential diagnostic biomarkers. Categorically blood plasma contains classical plasma proteins (secreted by solid tissues and act in plasma), immunoglobulins, hormones, cytokines, chemokines and other soluble mediators, temporary passengers, tissue leakage products from dead/ damaged cells, abnormal secretions from tumour tissues, and foreign proteins from pathogens (Omenn 2006, Johann Schaller 2008). Classical plasma proteins comprise more than 500 true proteins, most of them have >20 different glycosylated forms with diverse molecular mass forms of each (degraded form from the precursor or mature form). Therefore there are more than 50,000 different molecular forms of classical proteins in plasma (Anderson and Anderson 2002, Johann Schaller 2008); results in 500,000 different molecular forms of proteins or peptides due to posttranslational modification, degradation or cleavage (Omenn 2006, Johann Schaller 2008). Proteases and proteases inhibitors, both are present in plasma. However due to the presence of large quantities and range of proteases that are released into the blood by neutrophils and mononuclear phagocytes, protease inhibitors in plasma cannot perform their activities properly (Desrochers and Weiss 1988, Boyanton and 52 Chapter - II Materials and Methods Blick 2002, Clark, Youngman et al. 2003). Endogenous proteolytic activity causes protein degradations in blood if it is stored at room temperature for a prolonged time. Therefore, long-standing contact of plasma/serum with cells in the blood specimen results in unauthentic diagnostic results (Boyanton and Blick 2002). More importantly, for the proteomic and glycomic analyses of plasma, it is very important to collect, conserve and store the samples avoiding the protease related protein degradations (Ayache, Panelli et al. 2006). Plasma is the mostly accessible specimen in the clinical diagnosis as most cells communicate with it. Cells also release their content into soluble form in plasma upon damage or death (Anderson NL 2004). Twenty high-abundant proteins in plasma together represent about 97-99% of the total proteins and the rest proteins in plasma span a concentration of even 11 orders of magnitude (Anderson and Anderson 2003). Albumin is the most abundant protein in human plasma which constitutes more than half of the total plasma protein and is present at 30-50 mg/ml concentration. The immunoglobulin heavy and light chains (the second most abundant proteins in the plasma), along with albumin represents collectively about 80% of the total plasma proteins. In contrast, most of the proteins are secreted into the blood stream at very low copy number; and perhaps they are the primary targets to identify the novel markers (Adkins, Varnum et al. 2002, Merrell K 2004, Zolg and Langen 2004, Lathrop 2005, Thadikkaran, Siegenthaler et al. 2005, Tsangaris, Weitzdörfer et al. 2005). There is no accurate method that can detect proteins of less than 5 or 6 orders of magnitude (Anderson and Anderson 2003, Fountoulakis, Juranville et al. 2004). Therefore, considering the limitations in the detection sensitivity and high abundance of few proteins, depletion of high-abundant proteins may help to reduce the complexity of plasma for better detections of more dynamic ranges of proteins. 2.12.2. Depletion Technique Immuno-depletion involved selective binding of high abundant proteins from the study samples. Multiple affinity removal spin cartridge (MARS cartridge, Agilent Technologies) has these selected antibodies bound to its chromatographic support which thus helps to remove 14 most abundant proteins (albumin, IgG, 53 Chapter - II Materials and Methods antitrypsin, IgA, transferrin, haptoglobin, fibrinogen, alpha2-macroglobulin, alpha1acid glycoprotein, IgM, apolipoprotein AI, apolipoprotein AII, complement C3, and transthyretin) from plasma samples (Figure 2.7). Briefly, 10 μL of plasma sample isolated from the P100 tube was diluted 20 times with buffer-A (agilent.com), filtered (0.22-μm) to prevent clogging of spin cartridge frits, and then placed in to the MARS cartridge. These 14 high-abundant proteins were simultaneously removed when plasma was passed through the cartridge depleting approximately 94% of total plasma protein. Remaining low abundance proteins were then concentrated and desalted by using spin concentrator (>5 kDa) and stored at -800C for future proteomic and glycomic analyses. High-abundant proteins in the elution steps were also stored at -800C for future use. Figure 2.7: Depletion of proteins by MARS cartridge (agilent.com) 2.13. Quantification of Proteins (Bradford Assay) High-abundant protein depleted plasma samples were quantitated by adding 2μl to a 96-well flat bottomed plate in duplicate. Serial dilutions of BSA were prepared as a known standard as shown in Table 2.1. Bradford reagent (190 μl) was added to each well. Final volume was adjusted with PBS to 200 μl/well. Absorbance was measured at 595 nm after 5-10 minutes incubation and plasma concentration was determined from the known standards. 54 Chapter - II Materials and Methods Table 2.2. Bradford protein detection assay set-up Final protein concentration (μg/ml) 0 10 20 30 40 50 2.14. Volume of 1 mg/ml BSA (μl) 0 2 4 6 8 10 Volume of Bradford reagent (μl) 190 190 190 190 190 190 Volume of PBS (μl) 10 8 6 4 2 0 One Dimensional Gel Electrophoresis After preparation of resolving gel and setting the plates into the unit, 3.4 ml of resolving gel was poured in between the glass plates. One ml of water-saturated butanol was poured on resolving gel and incubated for 40 minutes at room temperature. The 4% stacking gel was prepared freshly. After 40 minutes the plate was washed with water to remove butanol and dried with filter paper. Stacking gel was poured on to the plate. The comb was then set gently and the plate was incubated overnight at room temperature. High abundant protein depleted plasma samples and protein standards were prepared in pre-labelled tubes. Tubes were then placed on heating block at 950C for 5 minutes. Samples and standards added to the wells in the gel. Running buffer poured into the chamber (outer and inner) and electrophoresis was performed at 200V for 50 minutes. The tracking dye band was observed in the gel moving forward. After electrophoresis, the gel was placed on a staining tray and washed in 100 ml of deionised water for 15 minutes and repeated twice. The coomassie staining solution was then added to completely immerse the gel in the staining solution and incubated overnight. Gel was washed with water five minutes at which point the gel was ready for imaging by the Documentation System (Samsung ES20). Images were used to compare the bands in different gels and wells and molecular weight of unknown protein was measured by comparison with the bands of known protein sizes. 55 Chapter - II 2.15. Materials and Methods Proteomic Array “Tandem mass tagging” (TMT) is the most recent proteomic advances; probably the simplest with the best accuracy than other proteomic approaches. By using a particular isobaric TMT label for each sample TMT allow identifications of peptides depending on its relative abundance in different samples. Therefore both the identity and relative abundances of peptide pairs can be simultaneously determined by TMT. On the other hand, “lectin microarray” is a relatively recent and powerful technique to investigate the affinity of different lectins to the glycoproteins in the sample. This state of the art technique provides rapid characterization of carbohydrates on glycoconjugates in a microarray format by simultaneous observation of the multiple and distinct binding affinities. This assay was performed in the proteomics laboratory in University of Bristol using standard protocols. The procedure for proteomics (as provided by the laboratory) is briefly outlined below: 2.15.1. TMT Labelling and cation exchange chromatography Aliquots of 75 µg of five plasma samples (high abundant protein depleted) were digested with trypsin (2.5µg trypsin per 100µg protein; 37°C, overnight) and labelled with Tandem Mass Tag (TMT) six-plex reagents according to the manufacturer‟s protocol (Thermo Fisher Scientific, Loughborough, LE11 5RG, UK). After labelling, samples were combined in equal amounts and a 10µg aliquot was resuspended in 5% formic acid and then desalted using SepPak cartridges according to the manufacturer‟s instructions (Waters, Massachusetts, USA)). Eluate from the SepPak cartridge was evaporated to dryness and resuspended in 1% formic acid prior to analysis by nano-LC MS/MS using an LTQ-Orbitrap Velos Mass Spectrometer. 56 Chapter - II Materials and Methods Figure 2.8: Schematic Diagram of Tandem Mass Tagging. 2.15.2. Nano-LC Mass Spectromerty The sample was fractionated using a Dionex Ultimate 3000 nanoHPLC system in line with an LTQ-Orbitrap Velos mass spectrometer (Thermo Scientific). In brief, peptides in 1% (vol/vol) formic acid were injected onto an Acclaim PepMap C18 nano-trap column (Dionex). After washing with 0.5% (vol/vol) acetonitrile 0.1% (vol/vol) formic acid peptides were resolved on a 250 mm × 75 μm Acclaim PepMap C18 reverse phase analytical column (Dionex) over a 150 min organic gradient, using 7 gradient segments (1-6% solvent B over 1min., 6-15% B over 58min., 1532%B over 58min., 32-40%B over 3min., 40-90%B over 1min., held at 90%B for 6min and then reduced to 1%B over 1min.) with a flow rate of 300 nl min−1. Solvent A was 0.1% formic acid and Solvent B was aqueous 80% acetonitrile in 0.1% formic acid. Peptides were ionized by nano-electrospray ionization at 2.0kV using a stainless steel emitter with an internal diameter of 30 μm (Thermo Scientific) and a capillary temperature of 250°C. Tandem mass spectra were acquired using an LTQOrbitrap Velos mass spectrometer controlled by Xcalibur 2.1 software (Thermo Scientific) and operated in data-dependent acquisition mode. The Orbitrap was set to analyze the survey scans at 60,000 resolution (at m/z 400) in the mass range m/z 300 to 1800 and the top ten multiply charged ions in each duty cycle selected for MS/MS 57 Chapter - II Materials and Methods fragmentation using higher-energy collisional dissociation (HCD) with normalized collision energy of 45%, activation time of 0.1 ms and at a resolution of 7500 within the Orbitrap. Charge state filtering, where unassigned precursor ions were not selected for fragmentation, and dynamic exclusion (repeat count, 1; repeat duration, 30s; exclusion list size, 500) were used. 2.15.3. TMT Data Analysis The raw data files were processed and quantified using Proteome Discoverer software v1.2 (Thermo Scientific) and searched against the UniProt/SwissProt Human database using the SEQUEST (Ver. 28 Rev. 13) algorithm. Peptide precursor mass tolerance was set at 10ppm, and MS/MS tolerance was set at 0.8Da. Search criteria included oxidation of methionine (+15.9949) as a variable modification and carbamidomethylation of cysteine (+57.0214) and the addition of the TMT 6Plex mass tag (+229.163) to peptide N-termini and lysine as fixed modifications. Searches were performed with full tryptic digestion and a maximum of 1 missed cleavage was allowed. The reverse database search option was enabled and all peptide data was filtered to satisfy false discovery rate (FDR) of 5%. The Proteome Discoverer software generates a reverse “decoy” database from the same protein database and any peptides passing the initial filtering parameters that were derived from this decoy database are defined as false positive identifications. The minimum cross-correlation factor (Xcorr) filter was readjusted for each individual charge state separately to optimally meet the predetermined target FDR of 5% based on the number of random false positive matches from the reverse decoy database. Thus each data set has its own passing parameters. Quantitation was done using a peak integration window tolerance of 0.0075Da with the integration method set as the most confident centroid. Protein ratios presented in table X represent the median of the raw measured peptide ratios for each protein. 58 Chapter - II 2.16. Materials and Methods Glycomic Array (Lectin Profiling) A very common post-translational modification of proteins is the addition of glycans in a process called glycosylation. Glycans are the carbohydrate portion of the glycoconjugates, such as a glycoprotein, glycolipid, or a proteoglycan (Opdenakker, Rudd et al. 1993). It is estimated that approximately two-third of all human proteins are glycosylated (Apweiler, Hermjakob et al. 1999). Lectins are group of proteins that have specific binding activity to the carbohydrate residues of glycoproteins and glycolipids. Lectins bind to the monosaccharide portions (such as mannose, galactose/N-acetylgalactosamine, N-acetylglucosamine, fucose, and sialic acid) on the protein/lipid molecule with high affinity. Lectin mediates cellular recognition of a molecule or receptor; thus play important role in the interactions of a cell with other cells or with soluble mediators. Therefore lectins have a great involvement in immunological events such as cell proliferation and programmed death of cells, metastasis of tumour cells, migrations and homing of immune cells, and also infections (Sharon 2007). Lectin array experiment was carried out in the glycoscience core facilities in Biosciences, NUI Galway and briefly described below: 2.16.1. Alexa-Flour Labelling of Plasma Samples The high abundant protein depleted plasma samples were labelled with Alexaflour-555 by following manufacturer‟s instructions. Following overnight incubation with alexaflour, samples were dialysed with TBS overnight (TBS buffer was changed every few hours) using the dialysis cassette with pore size of 3.5 kDa to remove the unbound labels, and finally again dialysed with TBS-T for two hours. Alexa-labelled plasma samples were then taken from the dialysis cassette and quantitated for protein concentrations by measuring absorbance at 280 nm. Additional reading at 555 nm was also taken to correct the required volume of protein samples to be loaded in the lectin microarray slide. 59 Chapter - II Materials and Methods 2.16.2. Microarray Preparation, Incubation, and Scanning 43 lectins were selected for the lectin microarray based on their well-known carbohydrate binding specificities. Microarrays were printed with different lectins (diluted to 0.5 mg mL−1 in phosphate buffered saline) on hydrogel-coated glass slides under constant 62% humidity at 20 °C. Features were printed with 1 nL of lectin probes on glass slides in replicates of six features per probe. Following overnight incubation in the humidity chamber, slides were incubated for 1 hour at RT in 100 mM ethanolamine (in 50 mM sodium borate; pH 8). The slides were washed with PBST (0.05% Tween-20 in PBS; pH 7.4) and subsequently with PBS. Slides were then dried by centrifugation at 470g for 5 min at room temperature and stored at 4 °C with sicative for future use. Each slide had eight replicate sub-arrays printed on it. The experiment was carried out in dark. Printed slides were incubated in the cassette (Agilent Technologies). In brief, 70 μL of the labelled plasma sample (prepared in Tris-buffered saline with 0.05% Tween-20; TBS-T) was applied to each well of the gasket in the printed slide. Six replicate slides were incubated per lectin microarray experiment. The microarray slide was then placed in the cassette and incubated for 1 hour in a rotating incubator at 23 °C and 4 rpm. Slides were washed twice with TBS-T and subsequently with TBS, dried by centrifugation, and image was taken by a microarray scanner at the resolution of 5 μm. 2.16.3. Glycomic Data Extraction and Analysis Raw values for intensity were extracted from the images and exported as text to an Excel format. Following correction for background, median of six replicate spots per array was used as single data point for subsequent graphical and statistical analysis. The data was then normalized and presented as mean intensity with standard deviation (SD). A final cutoff value for data filtering was then selected by 750 RFUs. Normalization of data was performed by dividing the total intensity value for each subarray by the median total intensity value from all the sub arrays tested. This normalization strategy reduced the artifacts for signals above or below the normal ranges. 60 Chapter - II Materials and Methods For comparative and multivariate statistical analyses, the microarray data from each slide was normalized by dividing the total intensity of each with the median total intensity for all the sub-arrays. Significance was tested by Student's paired T-test (two-tailed). For heat map analysis, the values of postop, WSB, and TSB samples were divided by their respective levels in Preop samples for all four study patients. This was done to avoid the individual variations between the study patients and focussing on the effect of surgery on the local and systemic changes as well as changes in the collected transfused blood. 61 Chapter - II 2.17. Materials and Methods Statistical Analyses of the Study All statistical analyses were performed using GraphPad Prism software version 5.0.1 (GraphPad Software, San Diego, CA, USA). Readouts from assays were corrected for dilution factors. For simple representation of the results, figures were expressed in Box-Whisker plots on a Log10 scale as fold-changes over preoperative blood levels. For each patient fold-changes were calculated for biomarkers in post-operative blood, WSB and TSB samples. Pooled results were illustrated as median inter-quartile-range (IQR). Greater than one and less than one indicated supra-normal and sub-normal values, respectively compared to baseline preoperative levels. Missing values disqualified individual fold-calculations from inclusion in IQRs; no attempt being made to insert estimates. Significance was tested by non-parametric statistical tests. Postoperative changes in different biomarkers were compared by Wilcoxon test (paired) between Pre- and Post-operative levels in both NSBT and ASBT cohorts. Wilcoxon tests were also performed to compare with salvaged blood such as: preop vs WSB; preop vs TSB; and WSB vs TSB. To compare the trend of postop changes between NSBT and ASBT cohorts, non-parametric Mann-Whitney test (unpaired) were performed on postop fold changes between two groups. Non-parametric Mann-Whitney and Wilcoxon tests were performed on unpaired and paired data sets as appropriate for the in vitro PBMC studies. Individual variations attributed to genetic polymorphisms were highlighted by plotting post-operative against pre-operative values for each patient on a Log10/Log10 scale or linear scale as appropriate. Similarly, individual variations in salvaged blood were highlighted by plotting WSB and TSB values against their respective pre-operative values on Log10/Log10 scale or linear scale as needed. Spearman correlation was performed on the postop fold changes between a particular biomarker (X) and the changes in all other individual biomarkers (Y) in both NSBT and ASBT cohorts. Spearman correlations were also performed to compare the correlation between changes in wound site (WSB) for one particular biomarker (X) and the changes in all other biomarkers (Y) than their levels in peripheral blood; so as for TSB vs. WSB. 62 Chapter - II Materials and Methods Two-way ANOVA was performed on the datasets to compare levels of different biomarkers simultaneously for different groups and different incubation periods in the in vitro PBMC and human whole blood culture studies. 63 CHAPTER – III RESULTS: Characterization of Post-traumatic Immunosuppression (PTI) and Assessment of the Effect of Autologous Salvaged Blood Transfusion Chapter – III :Results Characterization of PTI and Effects of ASBT on PTI 3.1. Patients’ Characteristics There were no differences between the NSBT and ASBT cohorts in age, gender and length of hospital stay (Table 3.1). Post-operative haematological changes following surgical trauma included: decreased red cells, platelets, lymphocytes, eosinophils and basophils; and increased neutrophils and monocytes. Additionally haemoglobin levels as well as haematocrit values decreased postoperatively. Postoperative levels of different common biochemical measurements such as sodium, potassium, urea, and creatinine were either slightly decreased or unchanged. However, for all the haematological and biochemical parameters, no differences were observed between NSBT and ASBT cohorts (Table 3.1). For all biomarkers analysed no differences were found that were attributable to gender, diagnosis, NSAIDs, and age. No significant correlations were found between fold-values and length of hospital stay (Appendix – IIIA). Actual values for individual pre-operative biomarker (i.e. baseline) levels differed by several orders of magnitude between patients, but trends in post-operative values were consistent across group, when expressed as fold-changes over pre-operative levels. Thus major changes were revealed between NSBT and ASBT cohorts. There were no noteworthy correlations observed between the fold-changes in different biomarkers and the volume of drained blood (Appendix – IIIB). In the ASBT cohort no significant correlations were observed between fold-values and volume of blood salvaged (Appendix – IIIC). There were no post-operative infections or wound healing problems in any patient, and there were no significant differences between ASBT and NSBT cohorts in clinical outcome measures. 65 Chapter – III :Results Characterization of PTI and Effects of ASBT on PTI Table 3.1 - Patient Characteristics and Haematological Information Median Age in Years (range) NSBT ASBT 74 (61-86) 73(56-86) 5:13 8:17 Gender (male : female) NSBT & ASBT combined mean-fold Hospital Stay Median Days (range) 4 (4-6) change 5 (3-7) over pre-op. Haematological Biomarkers: Mean ±SD (Missing Values) Pre-op. p Post-op. Pre-op. p Post-op. RBC (x1012/L) 4.41±0.55(0) *** 3.54±0.46(0) 4.43±0.5(0) *** 3.55±0.44(0) 0.80±0.08 Haemoglobin(g/dl) 12.64±1.41(0) *** 10.21±1.14(0) 13.48±1.57(0) *** 10.75±1.44(0) 0.80±0.08 Haematocrit (Hct) 0.39±0.04 (0) *** 0.31±0.03 (0 0.42±0.04 (0) *** 0.33±0.04 (0) 0.79±0.08 Platelet (x109/L) 269.10±63.53(0) ** 227.78±70.62(0) 243.90±57.69(0) *** 189.56±48.69(0) 0.80±0.14 WBC (x109/ L) 7.28±1.38(0) *** 9.30±2.42(0) 7.61±2.37(0) *** 9.66±2.30(0) 1.31±0.31 Lymphocyte(x109/L) 1.91±0.75(0) *** 1.09±0.52(0) 1.85±0.75(0) *** 1.23±0.51(0) 0.64±0.20 Monocytes (x109/L) 0.61±0.24(0) * 0.99±0.51(0) 0.56±0.19(0) *** 1.03±0.30(0) 1.84±0.79 Neutrophil (x109/L) 4.55 ± 0.88(0) *** 7.13±2.09(0) 5.00±2.11(0) *** 7.36±2.13(0) 1.62±0.52 Eosinophil (x109/L) 0.19±0.13(5) *** 0.05±0.07(5) 0.17±0.11(7) *** 0.06±0.08(7) 0.32±0.31 Basophil (x109/L) 0.04±0.03(1) *** 0.019 ± 0.01(1) 0.03±0.01(4) *** 0.015 ± 0.01(4) 0.55±0.27 Other Biochemical Parameters: Mean ±SD (Missing Values) Sodium 139.9 ± 4.14 (0) * 137.6 ± 2.28 (0) 140.3 ± 3.51 (0) *** 137.0 ± 3.55 (0) 0.98 ± 0.02 Potassium 4.51 ± 0.55 (0) * 4.21 ± 0.27 (0) 4.33 ± 0.42 (0) * 4.02 ± 0.33 (0) 0.94 ± 0.09 Urea 6.43 ± 1.65 (0) * 5.16 ± 1.64 (0) 6.34 ± 1.68 (0) NS 5.84 ± 1.82 (0) 0.90 ± 0.32 77.76 ± 19.5 (0) NS 79.24±23.85 (0) 0.98 ± 0.22 Creatinine 78.83± 18.77 (0) NS 74.94±21.54 (0) *p= <0·05 **p= <0·001 ***p= <0·0001 66 Chapter – III :Results Characterization of PTI and Effects of ASBT on PTI 3.2. Damage Associated Molecular Patterns (DAMPs) Post-operative levels of the damage associated molecular patterns (DAMPs) such as α-Defensin, HSP-70 and S100-A8/A9 were elevated whereas HMGB-1 was decreased in both NSBT and ASBT cohorts (Fig. 3.1A & Appendix–IV). Others HSP-27 and HSP-60 remained unchanged. Of note, increased Annexin-A2 levels occurred after salvaged blood transfusion. Degree of postoperative reduction in HMGB-1 was significantly higher in the NSBT cohort comparing with ASBT cohort (Fig. 3.1A). Individual variations are shown in Figure 3.1B. Figure 3.1: Postoperative Fold Changes in DAMPs. (A) Levels of different DAMPs are plotted on a Log10 scale as median interquartile range (IQR) of fold-changes relative to pre-operative values for NSBT ( ), and ASBT ( ) cohorts. Significance of differences between pre-operative and post-operative values are represented by *, and differences between NSBT and ASBT cohort fold-values are represented by +. Thus: */+ = p <0·05, **/++ = p <0·001 and ***/+++ = p <0·0001. HMGB-1: High Mobility Group Box Protein-1; HSP: Heat Shock Protein. 67 68 are in blue circles ( ) and ASBT are in red squares ( ). Units of measurement are ng/ml. (B) Post-operative levels are plotted against pre-operative levels on a Log10/Log10 scale for each patient for DAMPs. NSBT patients Figure 3.1: Postoperative Fold Changes in DAMPs (Continued). Chapter – III :Results Characterization of PTI and Effects of ASBT on PTI Chapter – III :Results Characterization of PTI and Effects of ASBT on PTI 3.3. Pro-inflammatory Cytokines Post-operative levels of pro-inflammatory cytokines, IL-1β, IL-2, IL-17A, IFN-γ and TNF-α were suppressed in the NSBT cohort but elevated in the ASBT cohort (Fig. 3.2A & Appendix–IV). More than 20% postoperative reductions recorded in the levels of all these pro-inflammatory cytokines in the NSBT cohort. In contrast, in the ASBT cohort, levels of these cytokines were elevated more than 2 folds postoperatively. In both NSBT and ASBT cohorts, as a key biomarker of surgical trauma IL-6 was markedly elevated post-operatively (7.4±6.6 and 6.6±5.4 folds respectively), but the pro-inflammatory cytokine, IL-12p70 remained unchanged Individual variations between patients in their levels of different proinflammatory cytokines are shown in Figure 3.2B. Figure 3.2: Postoperative Fold Changes in Pro-inflammatory Cytokines. (A) Levels of pro-inflammatory cytokines are plotted on a Log10 scale as median interquartile range (IQR) of fold-changes relative to pre-operative values for NSBT ( ), and ASBT ( ) cohorts. Significance of differences between pre-operative and post-operative values are represented by *, and differences between NSBT and ASBT cohort fold-values are represented by +. Thus: */+ = p<0·05, **/++ = p<0·001 and ***/+++ = p<0·0001. IL: Interleukin; IFN: Interferon; TNF: Tumour necrosis factor. 69 70 (B) Post-operative levels are plotted against pre-operative levels on a Log10/Log10 scale for each patient for pro-inflammatory cytokines. NSBT ). Units of measurement are pg/ml. patients are in blue circles ( ) and ASBT are in red squares ( Figure 3.2: Postoperative Fold Changes in Pro-inflammatory Cytokines (Continued). Chapter – III :Results Characterization of PTI and Effects of ASBT on PTI Chapter – III :Results Characterization of PTI and Effects of ASBT on PTI 3.4. Anti-inflammatory Cytokines In counterpoint, levels of key anti-inflammatory cytokines were either unchanged (IL-4, IL-10, IL-13 and TGF-β1) or increased (IL-5, IL-9 and IL-1RA) in the NSBT cohort (Fig. 3.3A & Appendix–IV). More interestingly, postoperative levels of these anti-inflammatory cytokines were significantly decreased in the ASBT cohort. Marked elevations in postoperative level of IL-1RA were observed in both NSBT and ASBT cohorts. Levels of TGF-β1 remained unchanged in both study groups. Individual variations between patients in their levels of different antiinflammatory cytokines are shown in Figure 3.3B. Figure 3.3: Postoperative Fold Changes in Anti-inflammatory Cytokines. (A) Levels of anti-inflammatory cytokines are plotted on a Log10 scale as median interquartile range (IQR) of fold-changes relative to pre-operative values for NSBT ( ), and ASBT ( ) cohorts. Significance of differences between pre-operative and post-operative values are represented by *, and differences between NSBT and ASBT cohort fold-values are represented by +. Thus: */+ = p <0·05, **/++ = p <0·001 and ***/+++ = p <0·0001. IL: Interleukin; TGF: Transforming growth factor. 71 72 NSBT patients are in blue circles ( ) and ASBT are in red squares ( ). Units of measurement are pg/ml except TGF-b1 (ng/ml). (B) Post-operative levels are plotted against pre-operative levels on a Log10/Log10 scale for each patient for anti-inflammatory cytokines. Figure 3.3: Postoperative Fold Changes in Anti-inflammatory Cytokines (Continued). Chapter – III :Results Characterization of PTI and Effects of ASBT on PTI Chapter – III :Results Characterization of PTI and Effects of ASBT on PTI 3.5. Chemokines Postoperative levels of IL-8 were elevated whereas MIP-1α was unchanged in both NSBT and ASBT cohorts. Of note, increased MCP-1 levels occurred only after salvaged blood transfusion (Fig. 3.4A & Appendix–IV). However there were no variations in the postoperative changes in different chemokines between two study cohorts. Individual variations between patients in their levels of different chemokines are shown in Figure 3.4B. Figure 3.4: Postoperative Fold Changes in Chemokines (A) Levels of chemokines are plotted on a Log10 scale as median interquartile range (IQR) of fold-changes relative to pre-operative values for NSBT ( ), and ASBT ( ) cohorts. Significance of differences between post-operative and pre-operative values are represented by *. Thus: * = p <0·05, ** = p <0·001 and *** = p <0·0001. (B) Postoperative plotted against levels are pre-operative levels on a Log10/Log10 scale for each patient for different chemokines. NSBT patients are in blue circles ( ) and ASBT are in red squares ( ). Units of measurement are pg/ml. IL: Interleukin; MCP: Monocyte chemoattractant protein; MIP: Macrophage inflammatory protein. 73 Chapter – III :Results Characterization of PTI and Effects of ASBT on PTI 3.6. Interleukin-22 (IL-22) Postoperative IL-22 was unchanged in the NSBT cohort but significantly elevated in the ASBT cohort (Fig. 3.5A and Appendix–IV). Individual variations are shown in Figure 3.5B. Figure 3.5: Postoperative Fold Changes in IL-22. (A) Levels of IL-22 are plotted on a Log10 scale as median interquartile range (IQR) of fold-changes relative to pre-operative values for NSBT ( ), and ASBT ( ) cohorts. Significance of differences between pre-operative and post-operative values are represented by *, and differences between NSBT and ASBT cohort fold-values are represented by +. Thus: */+ = p <0·05, **/++ = p <0·001 and ***/+++ = p <0·0001. (B) Postoperative levels are plotted against pre-operative levels on a Log10/Log10 scale for each patient for IL-22. NSBT patients are in blue circles ( ) and ASBT are in red squares ( ). Units of measurement are pg/ml. 74 Chapter – III :Results Characterization of PTI and Effects of ASBT on PTI 3.7. sIL-6R (Soluble IL-6 Receptor), sgp130 (Soluble gp130) and ADAM-17 (A Disintegrin and Metalloproteinase - domain 17) Postoperative sIL-6R and sgp130 were significantly decreased in both NSBT and ASBT cohorts. Whereas ADAM-17 in the NSBT cohort was unchanged, it was marginally elevated in the ASBT cohort (Fig. 3.6A & Appendix–IV). However no significance differences between study cohorts were detected in sIL-6R, sgp130, and ADAM-17 levels. Individual variations are shown in Figure 3.6B. Figure 3.6: Postoperative Fold Changes in sIL-6R, sgp130, and ADAM-17. (A) Levels of sIL-6R, sgp130, and ADAM-17 are plotted on a Log10 scale as median interquartile range (IQR) of fold-changes relative to pre-operative values for NSBT ( ), and ASBT ( ) cohorts. Significance of differences between post-operative and pre-operative values are represented by *. Thus: * = p <0·05, ** = p <0·001 and *** = p <0·0001. (B) Postoperative levels are plotted against pre-operative levels on a Log10/Log10 scale for each patient for sIL-6R, sgp130, and ADAM-17. NSBT patients are in blue circles ( ) and ASBT are in red squares ( ). Units of measurement are ng/ml. 75 Chapter – III :Results Characterization of PTI and Effects of ASBT on PTI 3.8. Soluble CD14 ( sCD14) Postoperative sCD14 was elevated in both NSBT and ASBT cohorts (p <0.0001) as shown in Fig. 3.7A and Appendix–IV and no difference was observed between cohorts. Individual variations are shown in Figure 3.7B. Figure 3.7: Postoperative Fold Changes in sCD14. (A) Levels of sCD14 are plotted on a Log10 scale as median interquartile range (IQR) of fold-changes relative to pre-operative values for NSBT ( ), and ASBT ( ) cohorts. Significance of differences between post-operative and pre-operative values are represented by *. Thus: * = p <0·05, ** = p <0·001 and *** = p <0·0001. (B) Postoperative levels are plotted against pre-operative levels on a Log10/Log10 scale for each patient for sCD14. NSBT patients are in blue circles ( ) and ASBT are in red squares ( ). Units of measurement are µg/ml. 76 Chapter – III :Results Characterization of PTI and Effects of ASBT on PTI 3.9. Lysozyme Activity Enzymatic activity of lysozyme was increased postoperatively in both NSBT (p = 0.04) and ASBT (p = 0.002) cohorts (Fig. 3.8A & Appendix–IV) and no differences were observed between cohorts. Individual variations are shown in Figure 3.8B. Figure 3.8: Postoperative Fold Changes in Total Lysozyme. (A) Levels of total lysozyme are plotted on a Log10 scale as median interquartile range (IQR) of foldchanges relative to pre-operative values for NSBT ( ), and ASBT ( ) cohorts. Significance of differences between post-operative and pre-operative values are represented by *. Thus: * = p <0·05, ** = p <0·001 and *** = p <0·0001. (B) Postoperative levels are plotted against pre-operative levels on a Log10/Log10 scale for each patient for total lysozyme. NSBT patients are in blue circles ( ) and ASBT are in red squares ( ). Units of measurement are x1000 IU/ml. 77 Chapter – III :Results Characterization of PTI and Effects of ASBT on PTI 3.10. Heat Stable Antigen (CD-24), Sialic Acid Binding Ig-like Domain-10 (Siglec-10) and Siglec-2 Postoperative CD-24 and Siglec-10 were greatly elevated in both NSBT and ASBT cohorts, but Siglec-2 showed no change (Fig. 3.9A & Appendix–IV). Individual variations are shown in Figure 3.9B. Figure 3.9: Postoperative Fold Changes in CD-24, Siglec-10, and Siglec-2. (A) Levels of CD-24, Siglec-10, and Siglec-2 are plotted on a Log10 scale as median interquartile range (IQR) of fold-changes relative to pre-operative values for NSBT ( ), and ASBT ( ) cohorts. Significance of differences between post-operative and pre-operative values are represented by *. Thus: * = p <0·05, ** = p <0·001 and *** = p <0·0001. (B) Postoperative levels are plotted against pre-operative levels on a Log10/Log10 scale for each patient for CD-24 and Siglec-10. NSBT patients are in blue circles ( ) and ASBT are in red squares ( ). Units of measurement are ng/ml. 78 Chapter – III :Results 3.11. Characterization of PTI and Effects of ASBT on PTI Complement Split Protein – C5a Postoperative C5a was elevated in both NSBT (p = 0.0002) and ASBT (p <0.0001) cohorts (Fig. 3.10A and Appendix–IV). The degree of elevation in ASBT cohort was higher than NSBT (p <0.0001). Individual variations are shown in Figure 3.10B. Figure 3.10: Postoperative Fold Changes in C5a. (A) Levels of C5a are plotted on a Log10 scale as median interquartile range (IQR) of fold-changes relative to pre-operative values for NSBT ( ), and ASBT ( ) cohorts. Significance of differences between pre-operative and post-operative values are represented by *, and differences between NSBT and ASBT cohort fold-values are represented by +. Thus: */+ = p <0·05, **/++ = p <0·001 and ***/+++ = p <0·0001. (B) Postoperative levels are plotted against pre-operative levels on a Log10/Log10 scale for each patient for C5a. NSBT patients are in blue circles ( ) and ASBT are in red squares ( ). Units of measurement are ng/ml. 79 Chapter – III :Results 3.12. Characterization of PTI and Effects of ASBT on PTI In-vitro PBMC Culture With or Without LPS Stimulation In absence of LPS, secretions by postoperative PBMCs were unchanged (IL- 10, IL-13 and TGF-β1) or increased (IL-1RA) equally in NSBT and ASBT cohort (Figure 3.11A). In presence of LPS postoperative, PBMC from NSBT showed significantly elevated levels of IL-10, IL-13, TGF-β1 and IL-1RA compared to preoperative PBMC. However, postoperative PBMC from ASBT showed no differences except that IL-13 was increased (Figure 3.11B). In the absence of LPS, IL-1β was secreted at higher levels by postoperative than preoperative PBMC in both NSBT and ASBT cohorts, and no changes occurred in IL-6 and TNF-α (Figure 3.11C). However, addition of LPS abrogated the IL-1β increase (Figure 3.11D). Levels of cytokines, IL- 12p70, IL-2 and IFN-γ were too low to detect. In the absence of LPS, no changes occurred in IL-8 release, whereas MCP-1 and MIP-1α secretion was raised in both NSBT and ASBT cohorts (Figure 3.11E). Stimulation by LPS caused increased secretion in IL-8 in both cohorts, but abrogated increases in MCP-1 and MIP-1α (Figure 3.11F). Individual variations are shown in Figure 3.11.G, H, I, and J. In absence of LPS, sCD14 (Fig 3.11.K) was secreted at higher levels by postoperative than preoperative PBMC in both NSBT and ASBT cohorts, and were marginally increased by LPS in the NSBT cohort (p = 0.01) as shown in Figure 3.11.K. Similarly, sIL-6R was secreted at elevated levels by postoperative PBMC in both NSBT and ASBT cohorts irrespective of addition of LPS (Fig 3.11.M). Individual variations are shown in Figure 3.11.L (for sCD14) and 3.11.N (for sIL6R). 80 Chapter – III :Results Characterization of PTI and Effects of ASBT on PTI Figure 3.11 (A-F): Biomarker Profiles of PBMCs Challenged with LPS. Cryopreserved and thawed PBMC from NSBT and ASBT patients adjusted to 106 viable cells per ml. and cultured with or without LPS. (A), (C) and (E): No added LPS; (B) (D) and (F): LPS (3ng/ml.). Results are expressed as fold-changes calculated by dividing post- operative PBMC results by their respective pre-operative PBMCs, and plotted on a Log10 scale as Median (IQR). (A) and (B) Anti- inflammatory cytokines; (C) and (D) Pro-inflammatory cytokines; (E) and (F) Chemokines. Post-operative values were compared with pre-operative values by one sample t-test on the fold changes (* = p <0·05, ** = p <0·001). 81 Chapter – III :Results Characterization of PTI and Effects of ASBT on PTI Figure 3.11 (G-H): Biomarker Profiles of PBMCs Challenged with LPS (Continued). Levels of biomarkers secreted by postoperative PBMCs are plotted against pre-operative PBMC values on Log10/Log10 scale for each patient without LPS challenge (G) or with LPS challenge (H). NSBT patients are in blue circles ( ) and ASBT are in red squares ( ). Units of measurement are pg/ml. 82 Chapter – III :Results Characterization of PTI and Effects of ASBT on PTI Figure 3.11 (I-J): Biomarker Profiles of PBMCs Challenged with LPS (Continued). Levels of biomarkers secreted by postoperative PBMCs without or with LPS challenge are plotted against pre-operative PBMC values on Log10/Log10 scale for each patient of NSBT (I) and ASBT (J) cohorts. No LPS values are in violet circles ( ) and LPS challenged values are in black squares ( ). Units of measurement are pg/ml. 83 Chapter – III :Results Characterization of PTI and Effects of ASBT on PTI sCD14 sIL-6R Figure 3.11 (K-N): Biomarker Profiles of PBMCs Challenged with LPS (Continued). Cryopreserved and thawed PBMC from NSBT and ASBT patients adjusted to 106 viable cells per ml. and cultured with or without LPS (3 ng/ml). Results are expressed as fold-changes calculated by dividing post- operative PBMC results by their respective pre-operative PBMCs, and plotted on a Log10 scale as Median (IQR). (K) sCD14 and (M) sIL-6R. Significance of differences between preoperative and post-operative values are represented by *, and differences between NSBT and ASBT cohort fold-values are represented by +. Thus: */+ = p <0·05; **/++ = p <0·001, and ***/+++ = p <0·0001. Levels of sCD14 and sIL-6R secreted by postoperative PBMCs are plotted against pre-operative PBMC values for each patient without LPS challenge (L and N - upper left) or with LPS challenge (L and N – upper right) respectively. NSBT patients are in blue circles ( ) and ASBT are in red squares ( ). Levels of sCD14 and sIL-6R secreted by postoperative PBMCs without or with LPS challenge are also plotted against pre-operative PBMC values for each patient of NSBT (L and N – bottom left) and ASBT (L and N – bottom right) cohorts. No LPS values are in violet circles ( ) and LPS challenged values are in black squares ( ). Units of measurement are pg/ml. 84 Chapter – III :Results 3.13. Characterization of PTI and Effects of ASBT on PTI Summary of Postoperative Observations Post-operative biomarkers of sterile trauma (termed common biomarkers of sterile trauma) were divisible into two groups, the first of which were common to all patients, and the second of which was significantly altered after anti-coagulated salvaged blood re-infusion (termed, salvaged blood sensitive biomarkers of sterile trauma). 3.13.1. Common Biomarkers of Sterile Trauma (Common-BST) All patients in the NSBT and ASBT cohorts showed similar post-operative trends in the haematological biomarkers. These included: above normal levels of neutrophils and monocytes; and, subnormal levels of lymphocytes, eosinophils, basophils, platelets, and red blood cells. All patients exhibited postoperative increases in DAMPs such as HSP-70, α-Defensin and S100A8/9, and decreased HMGB-1. All patients exhibited increases in the cytokines, IL-6 and IL-1RA; and in the chemokine, IL-8/CXCL8. No changes were detected in post-operative levels of HSP-27, HSP-60, TGF-β1, MIP-1α/CCL3 and IL-12p70. All patients showed increased levels for sCD14, CD24, Siglec-10, C5a and Lysozyme, and decreased levels for sIL-6R and sgp130. Combined mean fold-changes for all these biomarkers are documented in Table 3.2. 85 Chapter – III :Results Characterization of PTI and Effects of ASBT on PTI Table 3.2 : Common Biomarkers of Sterile Trauma (Common-BST) Marker Change Fold-Change (Mean ± SD) p Neutrophils 1·62 ± 0.53 *** Monocytes 1·84 ± 0.79 *** Lymphocytes 0·64 ± 0.20 *** Eosinophils 0·32 ± 0.32 *** Basophils 0·55 ± 0.27 *** RBC 0·80 ± 0.08 *** Platelets 0·80 ± 0.14 *** IL-6 6·94 ± 5.89 *** IL-1RA 1·33 ± 0.36 *** IL-8/CXCL8 2·02 ± 1.65 ** MIP-1α ↔ 1.25 ± 0.47 NS HMGB-1 0.57 ± 0.21 *** α-Defensin 1.18 ± 0.14 *** HSP-70 1·90 ± 0.95 *** S 100 A8/A9 3.96 ± 2.16 *** sCD14 1.63 ± 0.53 *** sIL-6R 0.87 ± 0.20 *** sgp130 0.91 ± 0.13 ** CD24 4.51 ± 1.99 *** Siglec-10 5.83 ± 3.05 *** C5a 1.73 ± 0.61 *** Lysozyme 5.83 ± 3.05 ** = increase, = decrease, ↔ = no change *p= 0·05 **p= 0·001 ***p= 0·0001 86 Chapter – III :Results Characterization of PTI and Effects of ASBT on PTI 3.13.2. Salvaged Blood Sensitive Biomarkers of Sterile Trauma (SBS-BST) Biomarkers of sterile trauma that were supra-normal, normal or sub-normal in the NSBT cohort, were significantly changed in the ASBT cohort. These included the DAMP - Annexin-A2, which was normal in the NSBT but above normal in the ASBT cohort. Key anti-inflammatory cytokines, IL-4, IL-5, IL-10, and IL-13 were normal in the NSBT cohort, and IL-5 was above normal; however in the ASBT cohort they were all sub-normal. Key pro-inflammatory cytokines, IL-1β, IL-2, IL17A, IFN-γ, and TNF-α were sub-normal in the NSBT cohort, but markedly supranormal in the ASBT cohort. ADAM-17 was normal in NSBT and supra-normal in ASBT cohort. Mean fold-changes (± SDs) are summarized separately for NSBT and ASBT cohorts in Table 3.3. Table 3.3 : Salvaged Blood Sensitive Biomarkers of Sterile Trauma (SBS-BST) NSBT Postop. Values ASBT Postop. Values Compared to Compared to Preop. Values Preop. Values NSBT Versus Biomarker Change Fold Change (Mean ± SD) Postop. Versus Preop Fold Change Change (Mean ± SD) p ASBT Postop. Versus p Preop. p IL-1β 0·79 ± 0.79 * 2·30 ± 0.98 *** *** IL-2 0·58 ± 0.53 ** 2·16 ± 1.21 *** *** IL-17A 0·80 ± 0.57 * 2·28 ± 1.61 ** ** IFN-γ 0·79 ± 1.54 * 3·15 ± 1.87 ** ** TNF-α 0·59 ± 0.53 ** 3·34 ± 2.12 *** *** IL-4 1·76 ± 1.91 NS 0·77 ± 0.43 * * IL-5 2·39 ± 2.26 * 0·61 ± 0.35 *** *** IL-9 1·81 ± 3.25 NS 0·64 ± 0.36 ** NS IL-10 2·03 ± 1.73 NS 0·63 ± 0.38 *** ** IL-13 1·07 ± 0.47 NS 0·72 ± 0.42 *** * MCP-1/CCL2 1·5 ± 1.10 NS 1·52 ± 0.66 NS NS Annexin-A2 0·96 ± 0.13 NS 1·43 ± 0.63 ** *** ADAM-17 1.12 ± 0.47 NS 1.33 ± 0.62 * NS = increase, = decrease, ↔ = no change, NS= Not Significant. *p= 0·05 **p= 0·001 ***p= 0·0001 87 Chapter – III :Results 3.14. Characterization of PTI and Effects of ASBT on PTI Correlation Between Postoperative Changes in Different Biomarkers 3.14.1. NSBT Spearman correlation analyses were performed to compare all changes in postoperative biomarkers (Table 3.4). Some selected correlations are described below: 1. Postoperative decrease in IL-17A correlated with decrease in IL-1β and IL-2. 2. Postoperative lymphopenia correlated with decrease in IL-1β, IL-17A, IL-2 and IFN-γ. 3. Decreased IL-2 was inversely associated with IL-6 elevations. 4. Postoperative IL-2 was correlated with thrombocytopenia and decreased haematocrit. 5. Decrease in sIL-6R was strongly correlated with decrease in sgp130; and ADAM-17 was inversely correlated with decreases in sIL-6R and sgp130. 6. Postoperative increases in S100A8/A9, CD24 and Siglec-10 were strongly correlated. 88 Chapter – III :Results Characterization of PTI and Effects of ASBT on PTI Table 3.4 : Spearman Correlation between changes in different biomarkers in NSBT 89 Chapter – III :Results Characterization of PTI and Effects of ASBT on PTI 3.14.2. ASBT Spearman correlations also performed to compare postoperative changes in biomarkers in ASBT cohort (Table 3.5). Selected observations are described below: 1. Decrease in sIL-6R and sgp130 were strongly correlated. However ADAM-17 was not correlated with these bio-factors. 2. Reduction in IL-10 was inversely correlated with elevation in IL-6, MCP-1, IL12p70, neopterin and CD24; and lymphopenia. 3. Elevations in both CD24 and Siglec-10 correlated with the elevated S100-A8/A9. CD24 and Siglec-10 were very strongly correlated. 4. CD24 and Siglec-10 were inversely associated with decreased RBC counts and haematocrit values. CD24 correlates with thrombocytopenia and lymphopenia. 90 Chapter – III :Results Characterization of PTI and Effects of ASBT on PTI Table 3.5 : Spearman Correlation between changes in different biomarkers in ASBT 91 CHAPTER – IV RESULTS: Constituents of Salvaged Blood Chapter – IV : Results Constituents of Salvaged Blood Levels of some biomarkers were dramatically elevated in salvaged blood plasma (both WSB and TSB) when compared with peripheral preoperative levels. These changes are described in the next few sections and levels of individual biomarkers in different plasma samples are given in Appendix-V. 4.1. Damage Associated Molecular Patterns (DAMPs) Levels of DAMPs (HMGB-1, S-100-A8/A9, α-Defensin, HSP-27, HSP-60 and HSP-70) were elevated between 9 and 120-fold at the surgical wound site compared with peripheral levels. One exception to this was Annexin-A, which was only marginally increased. Comparison of WSB and TSB revealed that whereas HMGB-1 was reduced either by consumption or degradation during the collection period, Annexin-A2 was elevated in the bag. The other DAMPs remained unchanged during the collection period (Figure 4.1A and Appendix-V). Individual variations are shown in Figure 4.1B. Figure 4.1 : Changes in DAMPs in Salvaged Blood (A) Levels are plotted on a Log10 scale as median interquartile range (IQR) of fold-changes relative to pre-operative values for WSB ( ) and TSB ( ). Significance of differences between pre-operative and WSB or TSB values are represented by *, and differences between WSB and TSB fold-values are represented by +. Thus: */+ = p <0.05, **/++ = p <0.001 and ***/+++ = p <0.0001. HMGB: High mobility group box protein; HSP: Heat shock protein. 93 94 (B) Salvaged blood levels (both WSB and TSB) of DAMPs are plotted against pre-operative peripheral levels on a Log10/Log10 scale for ). Units of measurement are ng/ml. ) and ASBT are in red squares ( each patient. NSBT patients are in blue circles ( Figure 4.1 : Changes in DAMPs in Salvaged Blood (Continued) Chapter – IV : Results Constituents of Salvaged Blood Chapter – IV : Results Constituents of Salvaged Blood 4.2. Pro-inflammatory Cytokines All pro-inflammatory cytokines (IL-1β, IL-2, IL-6, IL-12p70, IL-17A, IFN-γ, and TNF-α) were significantly elevated at the wound site and their levels continually increased in the bag during the collection period as evidenced by comparing WSB with TSB. In the case of IL-6, WSB contained 300 fold higher levels but more production occurred interestingly during collection as evidenced by 2,500 fold higher levels in TSB than in pre-operative blood (Figure 4.2A and Appendix-V). Individual variations are shown in Figure 4.2B. Figure 4.2 : Changes in Pro-inflammatory Cytokines in Salvaged Blood (A) Levels are plotted on a Log10 scale as median interquartile range (IQR) of fold-changes relative to pre-operative values for WSB ( ) and TSB ( ). Significance of differences between pre-operative and WSB or TSB values are represented by *, and differences between WSB and TSB fold-values are represented by +. Thus: */+ = p <0.05, **/++ = p <0.001 and ***/+++ = p <0.0001. IL: Interleukin; IFN: Interferon; TNF: Tumour necrosis factor. 95 96 (B) Salvaged blood levels (both WSB and TSB) are plotted against pre-operative peripheral levels on a Log10/Log10 scale for each patient. ). Units of measurement are pg/ml. ) and ASBT are in red squares ( NSBT patients are in blue circles ( Figure 4.2 : Changes in Pro-inflammatory Cytokines in Salvaged Blood (Continued) Chapter – IV : Results Constituents of Salvaged Blood Chapter – IV : Results Constituents of Salvaged Blood 4.3. Anti-inflammatory Cytokines In WSB, normal levels of IL-5 and IL-13 were accompanied by increased levels of IL-4, IL-9, IL-10, TGF-β1 and IL-1RA. Marginal increases occurred during the collection period in IL-4, IL-10, TGF-β1 and IL-1RA levels whereas there were no further changes in TSB for IL-5, IL-9 and IL-13 (Figure 4.3A and Appendix-V). Individual variations are shown in Figure 4.3B. Figure 4.3 : Changes in Anti-inflammatory Cytokines in Salvaged Blood (A) Levels are plotted on a Log10 scale as median interquartile range (IQR) of fold-changes relative to pre-operative values for WSB ( ) and TSB ( ). Significance of differences between pre-operative and WSB or TSB values are represented by *, and differences between WSB and TSB fold-values are represented by +. Thus: */+ = p <0.05, **/++ = p <0.001 and ***/+++ = p <0.0001. IL: Interleukin; TGF: Transforming Growth Factor; IL1RA: Interleukin-1 receptor antagonist. 97 98 (B) Salvaged blood levels (both WSB and TSB) of anti-inflammatory cytokines are plotted against pre-operative peripheral levels on a Log10/Log10 scale for each patient. NSBT patients are in blue circles ( ) and ASBT are in red squares ( ). Units of measurement are in pg/ml TGF-b1 (ng/ml). pg/mlexcept except TGF-β1 and IL-1RA who are in ng/ml. Figure 4.3 : Anti-inflammatory Cytokines (Continued) Chapter – IV : Results Constituents of Salvaged Blood Chapter – IV : Results Constituents of Salvaged Blood 4.4. Chemokines Chemokines (IL-8, MCP-1 and MIP-1α) were also elevated 9 to 15-fold in WSB compared with peripheral venous blood levels. More interestingly, like the proinflammatory cytokines, further increase in chemokine levels occurred during collection as evidenced by a further 2 to 17-fold higher levels in TSB compared to WSB (Figure 4.4A and Appendix-V). Individual variations are shown in Figure 4.4B. Figure 4.4 : Changes in Chemokines in Salvaged Blood (A) Levels are plotted on a Log10 scale as median interquartile range (IQR) of fold-changes relative to pre-operative values for WSB ( ) and TSB ( ). Significance of differences between pre-operative and WSB or TSB values are represented by *, and differences between WSB and TSB fold-values are represented by +. Thus: */+ = p <0.05, **/++ = p <0.001 and ***/+++ = p <0.0001. (B) Salvaged blood levels (both WSB and TSB) of chemokines are plotted against preoperative peripheral levels on a Log10/Log10 scale for each patient. NSBT patients are in blue circles ( ) and ASBT are in red squares ( ). Units of measurement are pg/ml. 99 Chapter – IV : Results Constituents of Salvaged Blood 4.5. Interleukin-22 (IL-22) and Keratinocyte Growth Factor (KGF) Elevations in IL-22 levels were found in WSB compared with peripheral levels; and further increased during the collection period as shown by comparing TSB with WSB. On the other hand, KGF levels were below the detection limit in peripheral blood, but became easily detectable in WSB, later dropping slightly in the bag during collection; presumably due to the dilution in the bag (Figure 4.5A and Appendix-V). Individual variations are shown in Figure 4.5B and 4.5C. Figure 4.5 : Changes in IL-22 and KGF in Salvaged Blood (A) Levels are plotted on a Log10 scale as median interquartile range (IQR) of fold-changes relative to pre-operative values for WSB ( ) and TSB ( ). Significance of differences between pre-operative and WSB or TSB values are represented by *, and differences between WSB and TSB fold-values are represented by +. Thus: */+ = p <0.05, **/++ = p <0.001 and ***/+++ = p <0.0001. (B) Salvaged blood levels (both WSB and TSB) of IL-22 are plotted against pre-operative peripheral levels on a Log10/Log10 scale for each patient. NSBT patients are in blue circles ( ) and ASBT are in red squares ( ). Units of measurement are pg/ml. (C) Peripheral and Salvaged blood levels (both WSB and TSB) of KGF in scatter plot. 100 Chapter – IV : Results Constituents of Salvaged Blood 4.6. sIL-6R (Soluble IL-6 Receptor), sgp130 (Soluble gp130) and ADAM-17 (A Disintegrin and Metalloproteinase - domain 17) Levels of sIL-6R, sgp130 and ADAM-17 were significantly elevated in the surgical wound site. However, no additional productions of sIL-6R or sgp130 were seen, but ADAM-17 decreased slightly during the collection period (Figure 4.6A and Appendix-V). Individual variations are shown in Figure 4.6B. Figure 4.6 : Changes in sIL-6R, sgp130 and ADAM-17 in Salvaged Blood (A) Levels are plotted on a Log10 scale as median interquartile range (IQR) of fold-changes relative to pre-operative values for WSB ( ) and TSB ( ). Significance of differences between pre-operative and WSB or TSB values are represented by *, and differences between WSB and TSB fold-values are represented by +. Thus: */+ = p <0.05, **/++ = p <0.001 and ***/+++ = p <0.0001. (B) Salvaged blood levels (both WSB and TSB) of sIL-6R, sgp130, and ADAM-17 are plotted against pre-operative peripheral levels on a Log10/Log10 scale for each patient. NSBT patients are in blue circles ( ) and ASBT are in red squares ( ). Units of measurement are ng/ml. 101 Chapter – IV : Results Constituents of Salvaged Blood 4.7. Soluble CD14 (sCD14) For all the study subjects, mean sCD14 levels were elevated significantly in both WSB and TSB samples as shown in Figure 4.7A and Appendix-V. Interestingly, a slight elevation during collection also found in TSB when compared with WSB values (p = 0.04). Individual variations are shown in Figure 4.7B. Figure 4.7 : Changes in sCD14 in Salvaged Blood (A) Levels are plotted on a Log10 scale as median interquartile range (IQR) of fold-changes relative to pre-operative values for WSB ( ) and TSB ( ). Significance of differences between preoperative and WSB or TSB values are represented by *, and differences between WSB and TSB foldvalues are represented by +. Thus: */+ = p <0.05, **/++ = p <0.001 and ***/+++ = p <0.0001. (B) Salvaged blood levels (both WSB and TSB) of sCD14 are plotted against pre-operative peripheral levels on a linear scale for each patient. NSBT patients are in blue circles ( ) and ASBT are in red squares ( ). Units of measurement are µg/ml. 102 Chapter – IV : Results Constituents of Salvaged Blood 4.8. Lysozyme Activity Lysozyme activity was also significantly increased at the surgical wound site, and was further elevated in TSB samples in the bag during the six hour collection period (TSB vs WSB) as shown in Figure 4.8A and Appendix-V. Individual variations are shown in Figure 4.8B. Figure 4.8 : Changes in Lysozyme in Salvaged Blood (A) Levels are plotted on a Log10 scale as median interquartile range (IQR) of fold-changes relative to pre-operative values for WSB ( ) and TSB ( ). Significance of differences between preoperative and WSB or TSB values are represented by *, and differences between WSB and TSB foldvalues are represented by +. Thus: */+ = p <0.05, **/++ = p <0.001 and ***/+++ = p <0.0001. (B) Salvaged blood levels (both WSB and TSB) of lysozyme are plotted against pre-operative peripheral levels on a linear scale for each patient. NSBT patients are in blue circles ( ) and ASBT are in red squares ( ). Units of measurement are 1000xIU/ml. 103 Chapter – IV : Results Constituents of Salvaged Blood 4.9. CD-24, Sialic Acid Binding Ig-like Domain-10 (Siglec-10) and Siglec-2 Plasma levels of soluble CD24 and Siglec-10 were elevated between 8 and 17fold respectively in WSB compared to their peripheral blood levels. However, no additional increase occurred during the collection period (Figure 4.9A and AppendixV). A pilot study on Siglec-2 levels showed no change in salvaged blood compared to peripheral blood level. Individual variations are shown in Figure 4.9B. Figure 4.9 : Changes in CD24, Siglec-10 and Siglec-2 in Salvaged Blood (A) Levels are plotted on a Log10 scale as median interquartile range (IQR) of foldchanges relative to pre-operative values for WSB ( ) and TSB ( ). Significance of differences between pre-operative and WSB or TSB values are represented by *, and differences between WSB and TSB foldvalues are represented by +. Thus: */+ = p <0.05, **/++ = p <0.001 and ***/+++ = p <0.0001. (B) Salvaged blood levels (both WSB and TSB) of CD24 and Siglec-10 are plotted against pre-operative peripheral levels on a Log10/Log10 scale for each patient. NSBT patients are in blue circles ( ) and ASBT are in red squares ( ). Units of measurement are ng/ml. 104 Chapter – IV : Results 4.10. Constituents of Salvaged Blood Complement Protein C5a C5a levels were also elevated in WSB. No further elevations in C5a levels were found during collection in the bag (TSB vs WSB) as shown in Figure 4.10A and Appendix-V. Individual variations are shown in Figure 4.10B. Figure 4.10 : Changes in C5a in Salvaged Blood (A) Levels are plotted on a Log10 scale as median interquartile range (IQR) of fold-changes relative to pre-operative values for WSB ( ) and TSB ( ). Significance of differences between preoperative and WSB or TSB values are represented by *, and differences between WSB and TSB foldvalues are represented by +. Thus: */+ = p <0.05, **/++ = p <0.001 and ***/+++ = p <0.0001. (B) Salvaged blood levels (both WSB and TSB) of C5a are plotted against pre-operative peripheral levels on a Log10/Log10 scale for each patient. NSBT patients are in blue circles ( ) and ASBT are in red squares ( ). Units of measurement are ng/ml. 105 Chapter – IV : Results 4.11. Constituents of Salvaged Blood Summary of Observations Elevated levels of 33 out of 36 biomarkers were observed in salvaged blood when expressed as fold-changes over pre-operative levels. Exceptions were IL-13 and Siglec-2 (n=3) which remained equivalent to normal pre-operative levels. Comparisons between WSB and TSB values allowed biomarkers of the salvaged blood transfusion effect to be divided into those that remained unchanged, termed ‘Stable-Biomarkers’, and those whose levels increased during the collection period, and termed ‘Dynamic-Biomarkers’. Stable-Biomarkers were assumed to have been continuously synthesised by damaged tissue within the wound site rather than in the collection bag. These were exemplified by massive and sustained fold-increases in: S100-A8/9, α-Defensin, HSP-27, HSP-60, HSP-70, CD24 and Siglec-10; modest increases in IL-9, sIL-6R, sgp130 and C5a; and also IL-5, IL-13, and Siglec-2 that remained unchanged. Mean fold-changes for stable-biomarkers are documented in Table 4.1. Dynamic-Biomarkers were assumed to have increased through continuous synthesis within the bag, during collection. These were illustrated by comparing foldincreases in TSB with fold-increases in WSB. Thus significant elevation was observed in Annexin-A2 which increased further, and HMGB-1, which was initially elevated above normal decreased. The pro-inflammatory cytokines, IL-1β, IL-2, IL6, IL-12p70, IL-17A, IFN- and TNF-α, were significantly above normal in WSB, but increased further in TSB. Similarly, the anti-inflammatory cytokines, IL-4, IL-10, IL-1RA and TGF-β1 were above normal in WSB but increased further in TSB. The chemokines, IL-8/CXCL8, MCP-1/CCL2 and MIP-1α/CCL3 were above normal in the WSB and also increased substantially in TSB. ADAM-17 and KGF although elevated in WSB, in the collection bag they were slightly decreased comparing with WSB levels. Elevations in sCD14 and lysozyme in WSB was accompanied with a further increase in TSB. IL-22 also showed similar trend of increases in TSB likewise other pro-inflammatory cytokines. Mean fold-changes (± SDs) are summarized separately for WSB and TSB in Table 4.1. 106 Chapter – IV : Results Constituents of Salvaged Blood Table 4.1 : Constituents of Salvaged Blood at One Hour (WSB)and Six Hours (TSB) After Surgery (Grey Highlight=Stable-Biomarkers) Marker (Number of ASBT patients tested) WSB Values Compared to Pre-operative Levels Direction Change TSB Values Compared to Preoperative Levels Fold Change (Mean ± SD) p Direction Change Fold Change (Mean ± SD) p Changes (WSB to TSB) p Pro-inflammatory Cytokines: IL-1β (25) 2.76 ± 3.20 * 6.38 ± 6.06 *** *** IL-2 (23) 4.70 ± 4.84 *** 5.18 ± 5.51 *** * IL-6 (25) 308.5 ± 863.6 *** 2495 ± 2053 *** *** IL-12p70 (23) 4.77 ± 5.96 *** 4.88 ± 6.63 ** * IL-17A (22) 4.31 ± 5.61 *** 9.05 ± 9.51 *** *** IFN- (22) 8.65 ± 12.95 *** 13.25 ± 13.04 *** ** TNF-α (21) 7.61 ± 7.72 *** 16.16 ± 13.44 *** *** Anti-inflammatory Cytokines: IL-4 (25) 2.27 ± 1.60 * 2.83 ± 1.83 * * IL-5 (25) 1.97 ± 2.43 NS 2.38 ± 3.40 * NS Il-9 (22) 2.82 ± 1.85 *** 3.29 ± 2.51 *** NS IL10 (25) 9.41 ± 15.89 * 10.61 ± 11.97 ** * IL-13 (24) 0.86 ± 0.71 NS 1.09 ± 1.08 NS NS IL-1RA (25) 3.19 ± 1.71 *** 4.40 ± 2.67 *** * TGF-β1 (25) 8.52 ± 4.11 *** 9.91 ± 4.44 *** * IL-8/CXCL8 (25) 15.28 ± 20.13 *** 194.8 ± 203.8 *** *** MCP-1/CCL2 (25) 9.24 ± 5.62 *** 43.72 ± 41.65 *** *** MIP-1α/CCL3 (25) 8.87 ± 6.60 *** 14.53 ± 14.01 *** *** HMGB-1(25) 17.62 ± 11.74 *** 12.29 ± 5.60 *** ** Annexin-A2 (25) 1.86 ± 0.40 * 2.16 ± 0.73 ** * S 100-A8/9 (25) 9.15 ± 5.40 *** 9.65 ± 5.87 *** NS α-Defensin (23) 27.34 ± 22.16 *** 29.97 ± 20.44 *** NS HSP-27 (25) 121.1 ± 74.76 *** 104.7 ± 96.3 *** NS HSP-60 (23) 54.36 ± 117.8 *** 50.01 ± 83.94 *** NS HSP-70 (25) 118.6 ± 59.41 *** 102.1 ± 47.58 *** NS IL-22 (16) 11.05 ± 14.81 *** 14.95 ± 14.84 *** * KGF (25) 124.5 ± 85.75 *** 87.18 ± 49.21 *** *** sIL-6R (25) 2.04 ± 0.51 *** 2.15 ± 0.60 *** NS Sgp130 (24) 1.98 ± 0.51 *** 2.04 ± 0.51 *** NS ADAM-17 (25) 6.64 ± 5.18 *** 5.67 ± 5.08 *** * sCD14 (25) 1.24 ± 0.33 ** 1.31 ± 0.32 *** * Lysozyme (25) 1.33 ± 0.25 *** 1.46 ± 0.26 *** * CD24 (25) 7.81 ± 3.44 *** 8.85 ± 4.45 *** NS Siglec-10 (25) 16.73 ± 10.00 *** 19.00 ± 11.89 *** NS Siglec-2 (3) 1.63 ± 0.52 NS 1.88 ± 0.59 NS NS C5a (25) 3.59 ± 1.37 *** 3.50 ± 1.00 *** 107 NS Chemokines: DAMPs: Other Biomarkers = increase, = decrease, ↔ = no change NS= Not Significant *p= 0·05 **p= 0·001 ***p= 0·0001 Chapter – IV : Results 4.12. Constituents of Salvaged Blood Correlation on Fold Changes in Salvaged Bloods Between all different Biomarkers Spearman correlation analyses were performed to compare all changes in biomarker levels in the surgical wound site (WSB/peripheral) and also in TSB during the collection period (TSB/WSB). Some selected correlations are described below: 4.12.1. Changes in Surgical Wound Site – WSB vs Peripheral (Table 4.2) 1. Elevation in IL-6 correlated with increase in MCP-1 and MIP-1α. 2. Increased HMGB-1 was inversely correlated with elevations in IL-6, MCP-1 and MIP-1α. 3. Elevated sIL-6R was correlated with increases in sgp130 in the surgical wound site. 4. Increases in molecules with antimicrobial properties, such as Lysozyme, sCD14 and α-Defensins, were correlated with elevations in sgp130. Lysozyme and sCD14 were also correlated with increased sIL-6R. 5. Elevations in S100-A8/A9, CD24 and Siglec-10 were also correlated. 4.12.2. Changes During Collection Period – TSB vs WSB (Table 4.3) 1. Further elevation in IL-6 was correlated with and those of all the studied chemokines (IL-8, MCP-1, and MIP-1α). 2. Elevations in all the studied chemokines in TSB were also correlated. 3. Correlations also found between increases in sIL-6-R and sgp130 in the bag. 108 Chapter – IV : Results Constituents of Salvaged Blood Table 4.2: Correlations on fold changes between different biomarkers in the surgical wound site (WSB/Peripheral) 109 Chapter – IV : Results Constituents of Salvaged Blood Table 4.3: Correlations on fold changes between different biomarkers during the blood collection period (TSB/WSB) 110 CHAPTER – V RESULTS: Proteomic and Glycomic Profiling of Venous and Salvaged Blood Chapter – V : Results Proteomic and Glycomic Profiling 5.1. One-Dimensional Gel Electrophoresis One-dimensional (1-D) gel electrophoresis of the highly abundant protein depleted plasma samples showed the presence of a novel band at ~14 kDa in the salvaged blood samples (in WSB and TSB) whereas this band was absent in both pre- and post-operative peripheral blood samples (Fig. 5.1). This preliminary experiment was considered sufficiently encouraging to carry out a complete proteomic analysis of a set of samples from one individual patient. The cost of such an analysis prevented additioal samples being analyzed. Figure 5.1: 1-D gel electrophoresis of venous and salvaged blood plasma samples. 112 Chapter – V : Results Proteomic and Glycomic Profiling 5.2. Tandem Mass Tagging (TMT) As mentioned earlier, the proteomic profiles of postoperative and salvaged blood plasma samples were compared with the properative profile. All experiments were performed using the high abundant protein depleted plasma samples from only one patient for this TMT pilot experiment. The patient was chosen based on their increased postoperative neopterin level, indicative of macrophage activation. A complete total proteomic signature was obtained using the LC-MS/MS methods as described in Chapter-II. A total of 465 proteins were identified of which 310 proteins had a minimum of two distinct peptides. We were interested in comparing the salvaged blood and postoperative plasma samples with the preoperative venous blood. Out of these 310 proteins 236 were present in all plasma samples. Table 5.1 and Figure 5.2 represents the changes in proteins in different ways such as: 1. Postop vs Preop: 31% proteins were downregulated (≥2 fold), with upregulations in 4% proteins whereas the remaining 65% were unchanged postoperatively. 2. Wound site vs Preop: Downregulation of more than 2 fold was observed in 19% proteins . In contrast, 22% of proteins were upregulated in the wound site samples comparing with venous blood. 3. Transfused blood vs Preop: Among 236 proteins in all the studied plasma samples, 53% were downregulated whereas 21% showed upregulation in the transfused salvaged blood when compared with the peripheral preoperative venous blood. 4. Transfused salvaged blood vs Wound site blood: Only 1% of all 236 proteins were downregulated whereas remaining 99% were unchanged and none of the proteins showed upregulation during the collection period in the bag in TSB when compared with the wound site blood profile. 5. Peripheral blood incubation – 5 hour vs 0 hour: When venous blood was left on bench for five hours, of a total 236 proteins 25.8% proteins showed downregulation whereas only 0.5% proteins were upregulated during the incubation periods. and remaining 73.7% were unchanged. 113 Chapter – V : Results Proteomic and Glycomic Profiling Table-5.1: Summary of Mass Spectrometric Analysis of the study samples Fold Decrease ( ≤ 2 fold) Comparison No Change Fold Increase ( ≥ 2 fold) Incomparable proteins ≥2 peptide hit Single peptide hit ≥2 peptide hit Single peptide hit ≥2 peptide hit Single peptide hit Preop vs. Postop 73 11 153 55 10 3 160 WSB vs. Preop 45 10 138 41 53 18 160 TSB vs. Preop 124 26 62 26 50 17 160 WSB vs. TSB 2 3 234 65 0 1 160 Preop – 5hr vs. 0hr 61 14 174 55 1 0 160 Figure 5.2: Alterations in TMT-profiles between the studied plasma samples. Here, downregulated if ≤0.5 fold, upregulated if ≥2.0 fold, unchanged if >0.5 and <2.0 fold. 114 Chapter – V : Results Proteomic and Glycomic Profiling Compared with the preoperative venous blood plasma, in the postoperative blood there was reduction in lipid transporting apolipoproteins, chaperone Tcomplex protein-1, clotting factors such as fibrinogen, carbon dioxide transporter carbonic anhydrase (1 and 2), and actin binding protein prolifin-1 (Appendix-IX). On the other hand, there was an accumulation of protease inhibitor α1-Antitrypsin, acute phase proteins such as CRP, α1- acid glycoprotein and lipopolysaccharide binding protein (LBP) in the postoperative plasma. In the surgical wound site there was reduction in lipid transporting proteins such as serum amyloid-A and apolipoproteins, chaperone T-complex protein-1, extracellular matrix protein Fibronectin-1, and acute phase protein α1- acid glycoprotein. On the other hand there were accumulations of glycolysis pathway proteins such as phosphoglycerate kinase and glyceraldehyde 3 phosphate dehydrogenase, haemoglobin subunits (α, β, γ and δ), carbon di-oxide transporter Carbonic Anhydrase-1, actin binding protein Prolifin-1, Fibrinogens (α, β and γ), DAMPs such as annexin-A2 and S100A4 and antimicrobial dermcidin (AppendixIX). Reductions in CRP and dermcidin occurred during the collection period in the bag (in TSB) compared with the initial wound site blood. In contrast following five hour incubations of citrated venous blood in room temperature, there were reductions in T-complex protein-1, Fibrinogens (1 and 2), apolipoproteins, and iron binding transferrin; whereas there was an accumulation of dermcidin (Appendix-IX). Heat map analyses were performed on fold changes in postoperative and salvaged blood plasma samples compared with fresh preoperative venous blood (Figure 5.3). Also, a comparison was made between freshly-collected venous blood and an aliquot of this incubated for five hours at room temperature (RT). This was done to simulate the incubation time incurred by the collection procedure in the bag. For heat map analysis 236 proteins were present in all plasma samples identified with two or more peptides. The coloured representation of the heat map analysis in Figure 5.3 clearly shows a notable difference in the proteomic profile of salvaged blood (both WSB and TSB) compared with preoperative peripheral blood. Interestingly, there was a very limited change during the collection period as recorded in TSB proteomic profiles comparing with WSB. Whereas following salvaged blood 115 Chapter – V : Results Proteomic and Glycomic Profiling transfusion, postoperative blood proteomes were also hugely different from preoperative profiles. Furthermore, incubations of venous blood for 5 hours a RT also significantly changed the proteomic profiles of the incubated blood. The heat map analyses was further subdivided and thus showed in three protein clusters. Figure 5.3(A): Heat map analyses on the complete proteomic profile of the study samples (No clustering). 116 Chapter – V : Results Proteomic and Glycomic Profiling Figure 5.3(B): Heat map analyses on individual clusters obtained from the complete proteomic map. 117 Chapter – V : Results Proteomic and Glycomic Profiling 5.3. Lectin Array The binding specificities of lectins in the lectin microarray profile for plasma samples are shown in Figure 5.4. Variations in responses were observed between individual patients for lectins that bind different carbohydrate motifs. Binding intensities were very low for many of the lectins; however SNA-I (specific for sialic acid-α-(2/6)-Gal/GalNAc) and RCA-1 lectins which recognise underlying N-acetyllactosamine (Gal-β-(1/4)-GlcNAc, type II LacNAc) type structures, were significantly higher in the plasma samples from most of the patients. While comparing the degree of binding specifities among all different samples in different patients, the following observations could be made. 1. The affinity of AIA that binds to β-Gal linked proteins was similar in all venous and salvaged blood samples. 2. ACA, which binds to Gal/GalNAc, showed equal binding to both pre- and post-operative venous blood plasma; however in the salvaged blood samples binding increased more than in the preoperative sample. On the other hand, ABL, another lectin which binds to Gal/GalNAc, binding was similar in all venous and salvaged blood samples, but was decreased in salvaged blood in some patients. 3. In the postoperative and salvaged blood samples, DSA’s ability to bind to Galβ-(1-3)-GalNAc was found to be unchanged compared with that in the preoperative venous blood plasma. Binding of LEL to Gal-β-(1-3)-GalNAc was unchanged; however there was a decreased binding in postoperative and wound site blood plasma compared to the preoperative level. 4. Lch-A binding specificity to mannose varied between patients, thus was unchanged or slightly decreased in postoperative and salvaged blood compared with preoperative level. 5. Unchanged binding abilities were also found in postop and salvaged plsama samples for WGA to bind to NeuAc. On the other hand, SNA-I, another lectin that binds to NeuAc showed trend of increased binding in postoperative and salvaged plasma compared with preoperative samples. 6. PHA-L, PHA-E, RCA-1, and CAA binding affinity to LacNAc were similar in all the venous and salvaged blood plasma samples. 7. AAL that binds to fucose showed increased binding in the postop and all salvaged plasma samples comparing with preoperatve venous plasma. 118 Chapter – V : Results Proteomic and Glycomic Profiling Figure 5.4: Lectin array data for venous and salvaged blood plasma samples from individual patient. 119 Chapter – V : Results Proteomic and Glycomic Profiling Figure 5.4 (Continued): Lectin array data for venous and salvaged blood plasma samples from individual patient. 120 Chapter – V : Results Proteomic and Glycomic Profiling Heat map analysis was perfomed on the normalized lectin micrarray data. For better representation of the clustering analysis, huge individual variations in the relative fluorescence unit (RFU) values between patients for most of the lectins was avoided by dividing the RFU values of postoperative venous and salvaged blood samples with the preoperative values respectively for each patient. Thus, the data resulted in a similar baseline value of 1 for the preoperative samples of all four patients. Using this baseline, postoperative and salvaged blood values were calculated as the fold changes in binding specificities to particular lectins. Cluster analysis showed mixed results with huge variations between patients (Figure 5.5). However, compared with preoperative samples, increased binding of SNA-I, SNA-II and AAL can be seen in most of the patients’ postoperative and salvaged blood samples. ACA was only increased in salvaged blood samples. On the other hand, PHA-L and LEL binding decreased in all samples compared with preoperative levels of most patients. Figure 5.5: Heat map analyses on lectin binding specifity of venous and salvaged blood samples from individual patient. 121 CHAPTER – VI DISCUSSION Chapter - VI Discussion 6.1. Characterization of Post-traumatic Immunosuppression (PTI) and Assessment of the Effect of Autologous Salvaged Blood Transfusion on PTI Most publications on post-operative immunity, where few biomarkers were assessed in limited numbers of patients, failed to assess more than a fraction of immune status. This is the most extensive study to date on immune status following major trauma. 35 biomarkers were used to measure diverse functional properties. Similar postoperative changes were found in biomarkers with similar or linked functional properties such as: pro-inflammatory cytokines, anti-inflammatory cytokines, chemokines, DAMPs, antimicrobial activity and complement breakdown products. Reinfusion of autologous salvaged blood did not alter the trends of many biomarker groups, but with exceptions of IL-1RA/TGFβ1, anti-inflammatory cytokines were decreased and pro-inflammatory cytokines were elevated as was Annexin-A2. Washing salvaged blood would remove most inflammatory and immunomodulatory contaminants. However, unwashed salvaged blood transfusion is widely practiced in arthroplasty, and dominated by defibrinated unwashed blood (Sarbinowski, Arvidsson et al. 2005, Muñoz, Slappendel et al. 2011). This study was not designed to evaluate the efficacy of different salvaging procedures, duration of surgery on immune status, or clinical outcomes such as infection. Rather this study focused on Gharehbaghian et al’s initial findings of reversal of PTI by reinfusion of ACD-anticoagulated unwashed salvaged blood. With exception of changes in natural killer cell precursor (NKp) and IFN-γ levels (Gharehbaghian, Truman et al. 2004), haematological measurements were consistent with other publications; where changes were due to surgical trauma irrespective of salvaged blood transfusion (Roche, Thorn et al. 1950, Laroche, Chrysanthou et al. 1992, Tsou, Peters et al. 2007, Kimura, Shimizu et al. 2010, McDonald, Pittman et al. 2010, Albertsmeier, Quaiser et al. 2014). The most frequently studied biomarkers following surgical trauma in all different investigations are the cytokines. It was revealed that IL-6 was analysed in most of the publications and described as “pro-inflammatory” cytokine except a very few articles (Muñoz, Muñoz et al. 2006, Rose-John, Scheller et al. 2006, Rose-John 123 Chapter - VI Discussion 2012). However, recent observations suggest that IL-6 plays dual role and other biomarkers such as sIL-6R, sgp130 and ADAM-17 direct IL-6 to be either pro- or anti-inflammatory (Rose-John, Scheller et al. 2006, Briso, Dienz et al. 2008, RoseJohn 2012). Elevations in IL-6 are observed after physiological stress such as extreme exercise (Philippou, Maridaki et al. 2012). Hence, diagnosing PTI with elevated postoperative IL-6 alone may be misleading. Systemic changes in postsurgical IL-1β and TNF-α remain controversial (Appendix-II). Findings of subnormal levels of IL-2, IL-17A and IFN-γ indicate that PTI involves both the innate and adaptive immuno-regulatory pathways. Elevation in these cytokines strengthened the case that ACD-anticoagulated autologous salvaged blood transfusion reversed PTI. Following major surgery levels of anti-inflammatory cytokines were normal (except IL-1RA and TGF-β1) as seen in NSBT cohort; whereas, decreased in ASBT, supporting the hypothesis of reversion of PTI by salvaged blood. Elevated IL-1RA following surgery may be associated with maintaining immune-homeostasis by inhibiting IL-1β whereas elevation in TGF-β1 may favour wound healing. Regarding the target sites for these key intermediaries, this study indicated that the response to bacterial endotoxin LPS was to synthesise anti-inflammatory cytokines IL-10, TGFβ and IL-1RA. In contrast, PBMC from ASBT patients produced no increase in antiinflammatory cytokines, implying that PTI was in part due to impaired functional capacity of immune cells against pathogens, and that ACD anti-coagulated salvaged blood transfusion abrogated this effect. Capacity of in vitro PBMC from both NSBT and ASBT cohorts to secrete pro-inflammatory cytokines and chemokines was similar; even after LPS stimulation. This contrasted with in vivo plasma levels of pro-inflammatory cytokines which were elevated in ASBT, presumably due to increased secretion within tissues. Systemic levels of chemokines may not reliably determine PTI. IL-8, the most frequently studied chemokine, was elevated in most surgical investigations (Appendix-II), but in this study, was little affected by salvaged blood transfusion. DAMPs play an important role in post-traumatic immune-homeostasis, but few articles have been published measuring soluble forms of DAMPs in blood. While others showed postoperative elevations (Suda, Kitagawa et al. 2006, 124 Chapter - VI Discussion Giannoudis, Mallina et al. 2010, Kohno, Anzai et al. 2011, Osoegawa, Yano et al. 2011, Takahata, Ono et al. 2011), this study reported significant reductions in HMGB-1 following total knee arthroplasty (TKA); indicating possible variations between different assays, surgical procedures, or non-standardized sample collection. Heat shock proteins were studied yet only in cardiac surgery where patients’ levels were found to be unchanged (HSP27 and HSP70) or decreased (HSP-60) (Dybdahl, Wahba et al. 2002, Pizon, Gburek et al. 2006, Szerafin, Hoetzenecker et al. 2008), whereas this TKA study showed systemic elevations in HSP-70 and no changes in HSP-27 and HSP-60, again indicating the possible variations between surgical procedures. Additionally, report on levels of the soluble DAMPs, α-Defensin and S100A8/A9 showed no differences between the study cohorts, supporting the view that DAMPs may not be appropriate biomarkers for PTI; although reductions in Annexin-A2 could be considered as an additional PTI marker. Hsing et al showed elevations in the levels of IL-22 following cardiac surgery (Hsing, Hsieh et al. 2006), whereas unchanged postoperative levels of IL-22 in the NSBT patients in this study indicated that trauma may not be the main trigger to release IL-22. Hence, a future study is needed to confirm the effect of surgery on IL22 following TKA. In contrast, elevations in IL-22 in ASBT patients indicated possible enhancement of post-traumatic immunity due to salvaged blood reinfusion. In contrast with the observations in this study, postoperative reductions in systemic sIL-6R and sgp130 levels were reported elsewhere (Kristiansson, Soop et al. 1998, Corbi, Rahmati et al. 2000). However, no study has been performed yet to measure the levels of these markers in knee arthroplasty settings. In a cardiac set up, reductions in sgp130 were reported following surgery (Corbi, Rahmati et al. 2000). Decreased systemic sgp130 reflected similar observations in TKA. Corbi et al also reported unchanged sIL-6R levels at different postoperative time-points following cardiac surgery. In contrast, in this study we reported overall reductions in systemic sIL-6R. This may indicate variations between different surgical procedures. This was the first attempt to measure ADAM-17 levels in human blood plasma. Elevations in ASBT but not in NSBT indicate increased shedding of membrane bound IL-6R into sIL-6R and enhancement of immunostimulatory trans-signalling in the ASBT cohort. 125 Chapter - VI Discussion This is also the first report on sCD14 in TKA patients. Bastian et al reported unchanged peripheral plasma sCD14 levels in hip replacement patients during six postoperative days of follow up. However, their study included only seven nontransfused patients (Bastian, Tamburstuen et al. 2011). Significant postoperative elevations were observed in sCD14 levels in all patients in this study; indicating that surgery influences sCD14 production. This was not altered by salvaged blood transfusion. Likewise, lysozyme studies also indicated boosting of antimicrobial properties following major sterile trauma. In this study elevations in sCD14 were correlated with monocytosis in vivo. However, elevations in sCD14 productions by postoperative PBMC (in vitro) indicated that monocytosis (in vivo) may not be the primary reason of this systemic sCD14 elevation. However, increased ability of postoperative PBMCs to release sCD14 may play role in this elevation. Future in vivo studies therefore are needed to confirm these findings. Due to the use of cryopreserved PBMC, freezing-thawing may adversely affect the survival of mature monocytes and hence affect the release of sCD14; however, his possibility was rejected with in vitro observations using fresh PBMCs (Appendix-VI). Only in NSBT cohort, production of sCD14 by postoperative PBMC following LPS stimulation was found higher than without LPS. This indicated the possibility that, after the initial insult (surgical trauma) PBMC in the NSBT group became vulnerable to infections when a secondary insult (LPS treatment) was applied. In contrast, postoperative PBMC in ASBT patients were capable of tolerating the secondary LPS stress. This is the first report measuring soluble Siglec-10 in any clinical setup; also the first investigation measuring soluble CD24 and Siglec-10 in joint replacement surgery. Systemic elevations in soluble forms of both CD24 and Siglec-10 were found following major sterile trauma. Liu et al suggested plasma levels of soluble CD24 as a rapid marker for Hepatocellular carcinoma (Liu, Yang et al. 2013) and others suggested soluble CD24 as a marker for immunosuppression (Li, Ling et al. 2014). No differences in the systemic levels of soluble CD24 and Siglec-10 findings between two study cohorts in this study indicated that elevations in these biomarkers were due to the general response to surgical trauma irrespective of salvaged blood transfusion. Unchanged systemic soluble Siglec-2 following trauma indicated no 126 Chapter - VI Discussion involvement of this biomarker in PTI, and strengthened the case that soluble Siglec10 may plays a vital role in immune responses following sterile trauma. Elevations in complement split products reflected the activation of complement pathway by enhancement of inflammatory responses (Guo and Ward 2005). A recent study reported that upregulation C5a was dependent on Factor-VII Activating Protein (FSAP) in trauma patients (Kanse, Gallenmueller et al. 2012). In this study, neutrophilia occurred following trauma possibly due to delayed apoptosis which may have association with elevated C5a (Perianayagam, Balakrishnan et al. 2002), and elevated IL-6 is also associated with neutrophilia (Hashizume, Higuchi et al. 2011). Degree of postoperative increases in both IL-6 and C5a were significantly higher in the ASBT cohort compared with NSBT, indicating more functional ability of circulating neutrophils in ASBT. Recent studies reported an inhibitory role of C5a on the inflammatory responses through IL-17A/IL-23 mediated pathways (Bosmann, Sarma et al. 2012); and also by down-regulating the TLR-4 and CD40 mediated inflammatory pathways (Hawlisch, Belkaid et al. 2005). Therefore the impact of C5a on posttraumatic immunity requires further mechanistic investigation. Correlation studies between different biomarkers revealed no dramatic insights indicating that biomarkers may have relatively independent roles in triggering PTI. Huge individual variations between postoperative fold changes in biomarkers in patients may lessen the degree of correlation, demanding a very large number of study patients. This study made a clear distinction between common and salvaged blood sensitive biomarkers of sterile trauma. Following tissue damage at the wound site, common biomarkers of sterile trauma may facilitate the local regeneration mechanisms. However, to facilitate regeneration, suppression of the local inflammatory cascades is a pre-requisite, which in turn trigger the development of PTI. Figure 6.1 summarizes in schematic form how post-traumatic alterations in different biomarkers influence PTI, and Figure 6.2 summarizes the scenario when PTI was reversed by reinfusion of ACD-anticoagulated autologous salvaged blood. In the light of these findings, we hypothesized that these salvage blood sensitive biomarkers of sterile trauma may best reflect immune status after trauma, in contrast 127 Chapter - VI Discussion to common biomarkers of sterile trauma; the latter being reflecting tissue regeneration. Figure 6.1: Biomarkers to Assess PTI following Major Surgery Figure 6.2: Reversion of PTI by reinfusion of salvaged blood 128 Chapter - VI Discussion Figure 6.3 : Radar plot of the postoperative fold changes in the biomarkers of sterile trauma; distinguishing two distinct panels of biomarkers of sterile trauma: common biomarkers and salvaged blood sensitive biomarkers. Here, data represented in a Radar Plot as the postoperative fold changes in Log10 scale and the grey circle designate no postoperative change. Biofactors represented from minimum to maximum postop changes in NSBT cohort as shown in blue line. Red line indicates the postop fold changes in ASBT cohort. Sensitive biomarkers were either decreased postoperatively in ASBT cohort (antiinflammatory cytokines) as shown in blue coloured boxes, or increased postoperatively in the ASBT compared to NSBT as shown in red coloured boxes. The common biomarkers of sterile trauma were not altered in ASBT compared to NSBT. 129 Chapter - VI Discussion 6.2. Constituents of Salvaged Blood In this study initial levels of biomarkers at the surgical wound site were measured and monitored how these changed during salvaged blood collection period. Surgery was carried out under tourniquet; therefore constituents of early salvaged wound site blood (i.e. WSB) originated from necrotic and ischaemic tissues within and around the surgical site. In general, levels of most biomarkers were elevated in WSB. Subsequently, after six hours, levels of some of these biomarkers were unchanged during the salvation period, termed Stable-Biomarkers. Stable-Biomarkers included, S100A8/A9, α-Defensin, HSP-27, HSP-70, HSP-60, IL-5, IL-9, IL-13, sIL-6R, sgp130, CD24, Siglec-10, Siglec-2 and C5a. These were assumed to have been continuously synthesised exclusively in vivo within tissues at the wound site. In contrast, the remaining biomarkers were further increased or decreased during the collection period in the bag, and therefore termed Dynamic Biomarkers. These included, chemokines (IL-8, MCP-1 and MIP-1α), pro-inflammatory cytokines (IL-1β, IL-2, IL-6, IL-12p70, IL-17, IFN-γ and TNF-α), some anti-inflammatory cytokines (IL-4, IL-10, TGF-β and IL-1RA) and others such as IL-22, KGF, ADAM-17, Annexin-A2, sCD14 and lysozyme. These changes were assumed mainly due to the ex-vivo synthesis by viable extravasated cells present in salvaged blood. In contrast with pro-inflammatory cytokines, relatively low but nonetheless significant elevations were recorded in most of anti-inflammatory cytokines; indicating continuation of immunosuppressive events following trauma aimed at wound healing. Relatively weak elevations in all these anti-inflammatory cytokines in the bag, in contrast to the pro-inflammatory cytokines; support the hypothesis that immune-stimulants were generated in the salvaged blood bag during the collection period. Massive elevations in different chemokines during the collection period; indicated release by sentinel and newly recruited immune cells, and necrotic cells drained from the surgery site. With their immediate productions at the wound site, biomarkers that showed the highest elevations during the collection period were IL-6 (from x300 to x2500 fold), IL-8/CXCL8 (from x15 to x195 fold), MCP-1/CCL2 130 Chapter - VI Discussion (from x9 to x44 fold), and MIP-1α/CCL3 (from x9 to x15 fold). Correlation studies confirmed strong associations of IL-6 with all these chemokines; indicating the possible involvement of cytokine-chemokine interactions directing generation of novel immunostimulatory substances. One of the most interesting observations was massive elevation in DAMPs with no further change during collection. DAMPs released following sterile trauma subsequently accelerate release of chemokines that recruit immune cells to the site of injury. Thus, increased DAMPs and chemokines would have accounted for the neutrophilia and monocytosis. However, overall these DAMP findings indicated an anti-inflammatory paradigm, in contrast to the SIRS paradigm (Bone, Balk et al. 1992). Role of IL-22 in tissue regeneration has been described in different injury models (Hsing, Hsieh et al. 2006, Zenewicz, Yancopoulos et al. 2007, Sasaki, Zhang et al. 2011, Rendon, Li et al. 2013). In this study, elevated IL-22 at surgical wound site supported this role and strong correlation between IL-22 and IL-17A was consistent with the production by TH-17 cells in the injury site (Liang, Tan et al. 2006). In WSB, the correlation of IL-22 with TNF-α and chemokine IL-8 also indicated recruitment of monocytes/neutrophils for clearance of necrotic tissues (Shi and Pamer 2011, Kolaczkowska and Kubes 2013). Systemic changes in IL-22 showed no correlations with any other biomarkers; indicating that IL-22 may play important role locally in triggering tissue regeneration, but not in systemic immunity. IL-22 stimulates inflammatory gene expression and migration of keratinocytes (Boniface, Bernard et al. 2005). Furthermore, keratinocyte growth factor (KGF) plays role in proliferation of fibroblasts and keratinocytes, and delays differentiation and apoptosis of cells at local surgery site; favouring wound healing (Werner, Smola et al. 1994, Andreadis, Hamoen et al. 2001). In this study, elevated KGF indicated possible involvement in remodelling epithelial tissue. Strong correlation of KGF at the wound site with HMGB-1 further suggests involvement in local wound healing mechanisms (Wild, Bergmann et al. 2012). Simulation study showed unchanged IL22 (Appendix-VII) indicating that immunostimulatory properties were generated exvivo during salvaged blood collection. 131 Chapter - VI Discussion In this study, slight but significant ex-vivo increases in sCD14 were possibly due to shedding of mCD14 from activated monocytes. Simulation study further confirmed this hypothesis with no change in incubated venous blood (AppendixVII). Local elevations in antimicrobial properties attributed to lysozyme, sCD14, αDefensins and S100A8/A9 mitigate PTI following sterile trauma. Further ex-vivo elevations in lysozyme and sCD14 suggested salvaged blood gathered more antimicrobial properties. In vitro whole blood culture treated with lysozyme resulted in increased pro-inflammatory cytokine and chemokine production whereas antiinflammatory cytokines were unchanged in a time dependent manner (AppendixVIII). This indicated that, elevated lysozyme in the salvaged blood may have played role in immunostimulation. Elevations in C5a indicated activation of complement cascade at the wound; whereas further ex-vivo elevations supported indirect involvement of C5a in elevating IL-6 possibly by live neutrophils (Perianayagam, Balakrishnan et al. 2002, Hashizume, Higuchi et al. 2011). Likewise DAMPs, elevated CD24 and Siglec-10 also indicated immunosuppressive events at the surgical wound site (Chen, Tang et al. 2009), and unchanged Siglec-2 confirmed dominance of Siglec-10 within the Siglec family glycoproteins in maintaining local immune responses. Increased CD24 and Siglec-10 in the simulation study, whereas in contrast, unchanged in TSB indicating that salvaged blood was not accumulating immunosuppressive properties in the bag (Appendix-VII). 132 Chapter - VI Discussion Figure 6.4 : Radar plot of fold changes in different biomarkers of sterile trauma in the surgical wound site and in the transfused salvaged blood; distinguishing two distinct panels of biomarkers in the transfused blood: stable biomarkers and dynamic biomarkers. Data represented as fold changes in salvaged blood plasma samples comparing with preoperative venous blood levels. Data showed in log10 scale where grey indicate baseline with no fold change. Data sorted as minimum to maximum of the fold changes in different biofactors. Significant changes in the wound site blood observed in most of the biomarker levels as shown in green line. Following the six hour collection period in the bag (red line), levels of some biomarkers were unchanged (termed as stable biomarkers) whereas the remaining biomarker levels were changed (termed as dynamic biomarkers). Maximum changes were observed in the levels of IL-6, IL-8, MCP-1 and MIP-1 alpha. 133 Chapter - VI Discussion Figure 6.5 : Radar plot of fold changes in different biomarkers of sterile trauma in the five-hourly incubated venous blood. Changes in the biomarkers following five hour bench incubation of preoperative venous blood was much lower comparing with changes in citrate anticoagulated salvaged blood over five hours incubation in the bag. 134 Chapter - VI Discussion 6.3. Diverse Roles of Interleukin-6 In this study IL-6 was included in the ex-vivo group of Dynamic-Biomarkers in salvaged blood. However, post-operative levels in both study cohorts were equally high; indicating reinfused IL-6 did not influence the levels due to tight homeostatic regulation. Subnormal postoperative sIL-6R indicated that IL-6 mediated antiinflammatory activities were specially via classical signalling. Decreased systemic sgp130 levels supported this classical signalling by blocking sIL-6R and thus facilitating IL-6 mediated anti-inflammatory activities. ADAM-17 was unchanged in NSBT but elevated in ASBT, indicating its potential to stimulate post-traumatic immunity following salvaged blood transfusion. More interestingly, simultaneous elevations in IL-6, sIL-6R, sgp130 and ADAM-17 in the surgical wound site suggested that although pro- and anti-inflammatory events happening simultaneously at the wound site, local immune-homeostasis favoured wound healing. Therefore, these contentious findings indicated multifaceted interactions of IL-6 with sIL-6R and sgp130 in maintaining immune-homeostasis following sterile trauma. IL-6 also plays other roles favouring immune-regulation following trauma. For example, IL-6 can be released by hepatocytes and acts as an acute phase protein and thus play role in controlling inflammation (Jawa, Anillo et al. 2011). Another role of IL-6 is its interactions in hypothalamus-pituitary axis to trigger release of cortisol and favour in anti-inflammatory events (Besedovsky, del Rey et al. 1991). IL-6 also influences the thermoregulatory centre in the hypothalamus to upregulate the febrile response following trauma (Hamzic 2013). Furthermore, IL-6 acts as chemo-attractant to recruit immune cells such as neutrophils to the site of injury (Hashizume, Higuchi et al. 2011). Taken together, multifaceted and enigmatic roles of IL-6 demand further investigations to better understand IL-6 immunobiology following sterile trauma. 135 Chapter - VI Discussion 6.4. Proteomic and Glycomic Profiling of Venous and Salvaged Blood This was the first attempt to compare the effect of surgery on the proteome, and proteomic changes in the surgical wound site. Proteomic approach in the transfused salvaged blood also never been tested. Significant alteration in the blood plasma proteome was found in salvaged blood when compared with the venous blood; with very little change occurring during the collection period in the bag. This study observed notable changes in plasma proteome of postoperative venous blood comparing with preoperative. On the other hand, of total 43 lectins, 10 or more showed alterations in their binding affinities to the respective glycoproteins/glycolipids in the postoperative venous blood or salvaged blood samples compared to preoperative. Depletion of high abundant proteins was very important because the relative concentrations of these proteins reduced assay sensitivity and yielded a lesser number of proteins to be identified; in particular the low abundant proteins would have remained undetected. The MARS cartridge was based on immuno-affinity chromatographic principles, and did not completely remove the 14 most highly abundant proteins. However it satisfactorily reduced the relative concentrations of these 14 proteins and hence there were no interference in identifying and quantifying other low molecular weight target proteins with smaller concentrations. Systemic elevation in C-reactive protein (CRP) following surgical trauma is widely recognized and also confirmed by this TMT study. CRP, as an acute phase protein, may trigger immunosuppressive activities (Honsawek, Deepaisarnsakul et al. 2011). On the other hand, likewise in hip replacement (Bastian, Tamburstuen et al. 2011), postoperative elevations in lipopolysaccharide binding protein (LBP) found in this TMT study; indicated increased antimicrobial properties following sterile trauma. Elevation in DAMPs such as Annexin-A2 and S100-A4 found at the surgical wound site in the TMT study further confirmed the ELISA observations. On the other hand, proteins associated with glycolysis/gluconeogenesis pathways also showed elevations at the wound site; probably indicating body’s evolutionary functional maintenance in lack of oxygen in the wound. Furthermore, increase in the levels of coagulation factors in the TMT analysis would have facilitated the clotting 136 Chapter - VI Discussion mechanisms in the wound. Interestingly, increase in antimicrobial biomarkers (dermcidin and lysozyme-C) were found at the local injury site. CRP level was decreased in the bag during the collection period; indicating that salvaged blood was losing its anti-inflammatory properties. Changes in glycosylation patterns are considered as markers for different diseases such as cancers (Ianni, Manerba et al. 2010, Fry, Afrough et al. 2011). However, no study has yet investigated whether surgery and/or blood transfusion can alter the glycosylation pattern. Therefore lectin microarray analysis was aimed to see if any local or systemic changes in the binding specifities of different lectins. Observations from four studied patients indicated that glycomic profile altered following surgery. However, this study could not determine whether the changes occurred due to only surgery or salvaged blood transfusion, or both. Lectin array in this study used the immobilized forms of lectins in the slide; which may be biologically different in human due to diverse glycoprotein orientations in human body. At least 20 out of the 43 lectins showed some levels of binding to the debulked plasma samples. There were some variations found between the venous and salvaged blood plasma samples in their lectin profiles; indicating the presence of different glycoforms in plasma. Therefore, lectin microarray study on differetnt plasma samples from the four studied patients provided inconclusive findings and inclusion of all TKA patients may be needed for better glycobiological understanding. 6.5. Differences with Other’s Results Previous studies on re-infusion of salvaged blood demonstrated either no change or immunosuppression following surgery (Tylman, Bengtson et al. 2001, Muñoz, Cobos et al. 2005, Munoz, Cobos et al. 2006, Muñoz, Muñoz et al. 2006). Munoz et al investigated different subsets of NK cells and declared no differences in post-operative NK-cell, TNF-α and IL-10 levels compared with non-transfused patients when compared with non-anti-coagulated salvaged blood (Munoz, Cobos et al. 2006). In-vitro LPS challenge in their study showed non-anti-coagulated salvaged blood to be associated with an anti-inflammatory response, as reflected by 137 Chapter - VI Discussion unchanged IL-10 and decreased TNF-α (Muñoz, Muñoz et al. 2006). Tylman et al also supported the above findings with increased IL-10 levels in patients who were re-infused with non-anti-coagulated salvaged blood (Tylman, Bengtson et al. 2001). Therefore, anti-coagulation of the reinfused blood may play vital role in modulation of PTI. Differences between non-anticoagulated and anticoagulated salvaged blood need to be resolved by future in-vitro and in-vivo studies. Elevated HMGB-1 was reported in publications in different surgery patients (Suda, Kitagawa et al. 2006, Giannoudis, Mallina et al. 2010, Osoegawa, Yano et al. 2011, Takahata, Ono et al. 2011). In contrast, in this study, postoperative reduction was found. Since there was no study on HMGB-1 levels in knee arthroplasty, this study could not confirm the biological significance. More importantly, publications on the postoperative changes in different biomarkers following surgery gave a complex scenario on identification of reliable biomarkers to define postoperative immune status (Appendix-II). Elevations in IL-6 and IL-8 were reported in publications as the markers for inflammation; however this study confirmed that these two biomarkers were common biomarkers of sterile trauma and therefore may have no relevant association with modulating postsurgical immune status. None of the studies offered extensive panels of biomarkers to measure immune status. 6.6. Biological Insights into Effects of Sterile Trauma 6.6.1. Enhancement in Antimicrobial Properties This study revealed postoperative elevations in the levels of different antimicrobial proteins such as sCD14, lysozyme, S100-A8/A9 and α-Defensins. Whereas the major role of lysozyme and sCD14 are to perform antimicrobial activities, immediately released DAMPs at the site of injury also have their distinct roles in other biological mechanisms. For example, S100-A8/A9 and α-Defensins, as the danger factors released immediately after surgery, may help in the migration of leukocytes to the site of injury (Ryckman, Vandal et al. 2003, Lehrer 2007). NETosis is a distinct form of cell death of neutrophils, that releases intracellular compounds (DNA, proteins or peptides) to the extracellular environment by dead or dying cells 138 Chapter - VI Discussion at the site of injury; thereby accelerate the anti-microbial actions (Darrah and Andrade 2012). Therefore, despite PTI, a developed innate immune system exists with antimicrobial properties that boosted following surgical or accidental trauma which is aimed at preventing infections. However the level of this additional antimicrobial defences may not be sufficient to prevent nosocomial infections due to PTI following sterile trauma. 6.6.2. Role of CD24/Siglec-10 Axis in Immunology Chen et al’s ground breaking observations established the mechanisms of CD24/Siglec-10 axis in the dampening of inflammatory activities following sterile injury (Chen, Tang et al. 2009). This study provided a means to distinguish inflammation caused by sterile trauma from that due to sepsis. Parlato et al showed an early and persistent reduction in CD24 expression on neutrophils from the sepsis patients, a phenomenon that was absent both in healthy controls and sterile trauma patients (Parlato, Souza-Fonseca-Guimaraes et al. 2014). Furthermore, in the graft versus host disease (GvHD) patients Toubai et al recently described dampening of inflammatory events mediated by the communications between CD24 on donor Tcells and Siglec-10 on recipient antigen presenting cells (Toubai, Hou et al. 2014). Recent investigations indicated the important involvement of CD24/Siglec-10 in autoimmune diseases, transplantation and other immunological complications following injury/surgery (Chen, Chen et al. 2011, Bandala-Sanchez, Zhang et al. 2013, Liu, Yang et al. 2013, Zheng, Wu et al. 2013, Parlato, Souza-FonsecaGuimaraes et al. 2014, Toubai, Hou et al. 2014). However, none of the publications studied the soluble forms of CD24 and Siglec-10 and therefore this is the first report that clearly showed huge systemic elevations in soluble CD24 and Siglec-10 following sterile trauma. Another important but yet poorly understood fact is the production of “natural auto-antibodies (IgM)” by B1a cells. Following trauma, phagocytes may ingest apoptotic cells and produce anti-inflammatory cytokines (IL-10, TGF-β) and decrease secretion of pro-inflammatory cytokines (IL-1, IL-12 and TNF-α), thereby immunosuppressing local responses (Voll, Herrmann et al. 1997, Munoz, Lauber et al. 2010, Darrah and Andrade 2012). Neoantigens produced by different enzymes as 139 Chapter - VI Discussion well as by post-translational modifications, triggers autoantibody IgM production by B1a cells. However, interestingly, recent study showed that expression of Siglec-10 on B1a cell downregulates the expansion of B1a cells and thus prevent production of IgM (Jellusova, Wellmann et al. 2010). Therefore Siglec-10 has vital role in alleviating the autoimmune reactions following major trauma. With systemic elevations in soluble CD24 and Siglec-10 following trauma, it was hypothesized that, these two soluble biomarkers mediate immunosuppression by controlling inflammatory monocytes/macrophages and in parallel prevent auto-immune reactions. Figure 6.3 schematically describes these hypotheses. Figure 6.6: Hypotheses on the immunological responses mediated by soluble forms of CD24 and Siglec-10. CD24/Siglec-10 can play inhibitory role only if Siglec-10 has the intracellular ITIM motif. If the Siglec-10/CD24/DAMP complex has the inhibitory ITIM motif, this complex can pinocytose into the immune cells such as antigen presenting cells to inhibit the NfKB mediated inflammations and hence reduce the productions of inflammatory cytokines. On the other hand, this ITIM containing Siglec-10/CD24/DAMP complex can also pinocytose into the B1a cells and thus limits the productions of IgM autoantibody by these cells. 140 Chapter - VI Discussion 6.7. Clinical Significance of Findings Reinfusion of ACD-anticoagulated autologous unwashed salvaged blood helps not only in blood conservation by reducing the practice of allogeneic blood transfusion, but also in boosting patients’ post-operative immunity possibly reducing patients’ vulnerability to nosocomial infections. Identification of novel immunostimulants in salvaged blood would therefore have therapeutic potential. In contrast, as elevated Siglec-10/CD24 levels following trauma may prevent autoimmune reactions, reinfusion of salvaged blood might inhibit this natural process and be detrimental. However, no differences between NSBT and ASBT cohorts in terms of systemic elevations in CD24 and Siglec-10 indicated that transfusion of this blood had very little effect on CD24/Siglec-10. Clinically, characterizing immune status of patients would be very important prior to treating with immunostimulatory drugs to reverse PTI. 141 Chapter - VI Discussion 6.8. Limitations of this study A very carefully designed study also ends up with limitations as there is no perimeter of perfection. The major limitations in this study are as below: a. No study on fresh immune cells: Cryopreservation of PBMC may affect the cellular phenotypic markers and their functional abilities. Studying fresh blood samples from patients for Flow cytometric cell surface and intracellular expressions of different immune cells could have been done immediately after sample collection from the patient. b. Blood Collection Time Points: Although no correlations found between length of hospital stay and changes in different biomarkers, in this study there was no fixed time point for postoperative blood collection. On the other hand, collections of postoperative venous blood at 1 and 6 hours after surgery would give better understanding on local and systemic immune responses. c. Clinical Outcome of Patients: Measurement of postoperative clinical outcomes such as pain score, knee score, anxiety/depression, satisfactions of the patients and more importantly history of infections following surgery would give better clinical picture in association with the studied immunological changes. However, such a study would need couple of thousand patients. 142 Chapter - VI Discussion 6.9. Future Directions It is possible to do some more studies using the existing plasma samples from this project. Also, some future projects can be directed based on these current findings by extending investigations of the specimens in hand. 6.9.1. Tandem mass tagging TMT results on one patient from ASBT cohort showed significant alterations in plasma proteome in both local and systemic bloods following surgery. Therefore the study demanded investigations on the samples from all 43 study patients. Proteomic variations between NSBT and ASBT cohorts would help in identifying the proteins involved in the development of PTI. 6.9.2. Fractionation of plasma to test for immunostimulants To identify the immunostimulants in transfused salvaged blood, plasma can be fractionated into few parts by size exclusion chromatography using Fast Performance Liquid Chromatography (FPLC). These plasma fractions can then be tested in vitro to see which fractions have immunostimulatory properties. Experiments would include the measurement of soluble biomarker levels as well as cellular expressions on cells from cultured PBMC or human whole blood. 6.9.3. Inflammatory cytokine gene expressions in venous and salvaged blood Venous and salvaged blood plasma samples can further be used to isolate circulating RNA and microRNA for investigating the gene expressions for different inflammatory and tissue regenerative biomarkers. 143 Chapter - VI Discussion My experiences in this “yet under-investigated area of research” nicely fits with the great quote from Sir Isaac – “I do not know what I may appear to the world; but to myself I seem to have been only like a boy playing on the seashore, and diverting myself in now and then finding a smoother pebble or a prettier shell than ordinary, whilst the great ocean of truth lay all undiscovered before me” - Isaac Newton (1642-1727) 144 CHAPTER - VII APPENDICES Chapter - VII Appendices APPENDIX – I : LEVELS OF BIOMARKERS IN WOUND BLOOD Table 7.1 : Levels of Biomarkers in Wound Blood Here AAA = Abdominal aortic aneurysm, THA = Total Hip Arthroplasty, TKA = Total Knee Arthroplasty, CABG = Coronary Artery Bypass Grafting, CPB = Cardio Pulmonary Bypass, h = hour. C = Complement; IL-(1β) = Interleukin-(1-beta); IL-1RA = IL-1 Receptor Antagonist; TNF = Tumour Necrosis Factor; IFN = Interferon; MCP = Monocyte Chemotactic Protein; MIP = Macrophage Inflammatory Protein; PGE2 = Prostaglandin E2; sIL-6R = Soluble IL-6 Receptor. INC = increase, DEC = Decrease, N.C. = No Change, N.D. = Not Detectable 146 Chapter - VII Appendices APPENDIX – II : LEVELS OF BIOMARKERS IN POST-OPERATIVELY FOLLOWING MAJOR SURGERY Table 7.2 : Levels of Biomarkers Postoperatively Following Major Surgery 147 Here THA = Total Hip Arthroplasty, TKA = Total Knee Arthroplasty, TJA = Total Joint Arthroplasty, CABG = Coronary Artery Bypass Grafting, CPB = Cardio Pulmonary Bypass; D = Day, h = hour. IL-(1β) = Interleukin-(1-beta); IL-1RA = IL-1 Receptor Antagonist; IFN = Interferon; TNF = Tumour Necrosis Factor; MCP = Monocyte Chemotactic Protein; MIP = Macrophage Inflammatory Protein; HMGB = High Mobility Group Protein; INC = increase, DEC = Decrease, N.C. = No Change, N.D. = Not Detectable Chapter - VII Appendices 148 Here THA = Total Hip Arthroplasty, TKA = Total Knee Arthroplasty, TJA = Total Joint Arthroplasty, CABG = Coronary Artery Bypass Grafting, CPB = Cardio Pulmonary Bypass; D = Day, h = hour. IL-(1β) = Interleukin-(1-beta); IL-1RA = IL-1 Receptor Antagonist; IFN = Interferon; TNF = Tumour Necrosis Factor; MCP = Monocyte Chemotactic Protein; MIP = Macrophage Inflammatory Protein; HMGB = High Mobility Group Protein INC = increase, DEC = Decrease, N.C. = No Change, N.D. = Not Detectable Chapter - VII Here THA = Total Hip Arthroplasty, TKA = Total Knee Arthroplasty, TJA = Total Joint Arthroplasty, CABG = Coronary Artery Bypass Grafting, CPB = Cardio Pulmonary Bypass; D = Day, h = hour. IL-(1β) = Interleukin-(1-beta); IL-1RA = IL-1 Receptor Antagonist; IFN = Interferon; TNF = Tumour Necrosis Factor; MCP = Monocyte Chemotactic Protein; MIP = Macrophage Inflammatory Protein; HMGB = High Mobility Group Protein INC = increase, DEC = Decrease, N.C. = No Change, N.D. = Not Detectable Appendices 149 Chapter - VII Appendices Here THA = Total Hip Arthroplasty, TKA = Total Knee Arthroplasty, TJA = Total Joint Arthroplasty, CABG = Coronary Artery Bypass Grafting, CPB = Cardio Pulmonary Bypass; D = Day, h = hour. IL-(1β) = Interleukin-(1-beta); IL-1RA = IL-1 Receptor Antagonist; IFN = Interferon; TNF = Tumour Necrosis Factor; MCP = Monocyte Chemotactic Protein; MIP = Macrophage Inflammatory Protein; HMGB = High Mobility Group Protein INC = increase, DEC = Decrease, N.C. = No Change, N.D. = Not Detectable 150 Chapter - VII Appendices APPENDIX - III (A) : CORRELATION BETWEEN BIOMARKER LEVELS AND LENGTH OF HOSPITAL STAY Table 7.3 (A) : Correlation Between Biomarker Levels and Length of Hospital Stay Hospital Stay vs. Postop Fold Changes Proinflammatory Cytokines Antiinflammatory Cytokines Chemokines DAMPs Other Factors NSBT ASBT NSBT + ASBT Drained ml r - 0.04 p 0.88 r 0.09 p 0.68 r 0.20 p 0.19 Age - 0.34 0.16 0.37 0.07 0.06 0.69 IL-1β - 0.38 0.12 - 0.04 0.85 0.07 0.66 IL-2 - 0.09 0.73 - 0.23 0.26 0.01 0.95 IL-6 0.01 0.97 - 0.09 0.66 - 0.07 0.66 IL-12p70 - 0.05 0.85 - 0.29 0.21 - 0.17 0.31 IL-17A - 0.40 0.10 - 0.26 0.23 - 0.07 0.69 IFN-γ - 0.21 0.54 - 0.09 0.71 0.13 0.47 TNF-α - 0.20 0.43 0.27 0.19 0.34 0.03 IL-4 - 0.27 0.28 0.04 0.87 - 0.20 0.19 IL-5 - 0.01 0.97 0.15 0.47 - 0.12 0.45 IL-9 - 0.09 0.74 - 0.29 0.18 - 0.16 0.33 IL-10 0.73 0.00 0.26 0.21 0.20 0.21 IL-13 - 0.05 0.83 - 0.11 0.59 - 0.18 0.26 IL-1RA 0.50 0.04 0.37 0.07 0.41 0.01 TGF-β1 - 0.21 0.41 0.41 0.04 0.32 0.04 IL-8 - 0.36 0.15 0.14 0.50 0.14 0.37 MCP-1 - 0.26 0.32 - 0.12 0.56 - 0.16 0.33 MIP-1α - 0.06 0.82 - 0.12 0.56 - 0.09 0.56 HSP-27 - 0.49 0.02 0.92 - 0.13 0.40 HSP-70 - 0.11 0.04 0.66 0.02 0.93 0.01 0.96 HSP-60 - 0.21 0.49 - 0.06 0.80 - 0.12 0.48 Annexin A2 - 0.07 0.78 - 0.06 0.77 0.06 0.69 S100-A8/A9 - 0.28 0.26 - 0.12 0.57 - 0.13 0.40 sIL-6R 0.63 0.001 0.33 0.10 0.40 0.007 Sgp130 0.14 0.57 0.11 0.60 0.15 0.32 ADAM-17 - 0.28 0.39 0.29 0.15 0.20 0.20 sCD-14 0.20 0.43 - 0.03 0.89 0.06 0.69 CD-24 - 0.13 0.61 0.21 0.30 0.12 0.45 Siglec-10 - 0.04 0.88 0.12 0.55 0.07 0.63 C5a - 0.06 0.80 - 0.10 0.63 0.10 0.52 Lysozyme 0.02 0.95 0.21 0.31 0.20 0.19 151 Chapter - VII Appendices APPENDIX - III (B) : CORRELATION BETWEEN BIOMARKER LEVELS AND DRAINED BLOOD VOLUME. Table 7.3 (B) : Correlation Between Biomarker Levels and Drained Blood Volume Drained Blood.Vol.ml. vs. Postop Fold Changes Antiinflammatory Cytokines Chemokines DAMPs Other Factors r ASBT p r p - 0.07 0.78 - 0.15 0.48 IL-1β 0.04 0.87 - 0.26 0.21 IL-2 0.49 0.04 0.03 0.89 IL-6 - 0.13 0.60 - 0.15 0.49 IL-12p70 - 0.16 0.54 - 0.25 0.29 IL-17A 0.15 0.56 0.15 0.49 IFN-γ 0.29 0.39 - 0.22 0.36 TNF-α 0.28 0.27 0.38 0.07 IL-4 - 0.10 0.70 0.18 0.39 IL-5 0.32 0.20 0.19 0.37 IL-9 - 0.05 0.84 0.02 0.92 IL-10 0.07 0.78 0.02 0.91 IL-13 - 0.07 0.80 - 0.22 0.30 IL-1RA - 0.14 0.58 0.25 0.25 TGF-β1 - 0.46 0.05 0.10 0.64 IL-8 0.59 0.01 0.23 0.28 MCP-1 0.17 0.52 - 0.45 0.03 MIP-1α 0.07 0.78 - 0.24 0.26 HSP-27 0.12 0.65 0.12 0.58 HSP-70 0.14 0.59 0.05 0.80 HSP-60 - 0.19 0.53 0.48 0.02 Annexin A2 - 0.28 0.26 0.14 0.52 S100-A8/A9 - 0.26 0.29 - 0.00 0.99 sIL-6R 0.26 0.30 - 0.21 0.33 Sgp130 0.12 0.63 - 0.06 0.77 ADAM-17 0.21 0.40 0.31 0.14 sCD-14 - 0.54 0.02 - 0.12 0.62 CD-24 - 0.17 0.50 - 0.30 0.16 Siglec-10 - 0.10 0.69 - 0.08 0.72 C5a - 0.55 0.02 - 0.09 0.66 Lysozyme - 0.33 0.18 - 0.12 0.59 Age Proinflammatory Cytokines NSBT 152 Chapter - VII Appendices APPENDIX – III (C) : CORRELATION BETWEEN BIOMARKER LEVELS AND TRANSFUSED BLOOD VOLUME. Table 7.3 (A) : Correlation Between Biomarker Levels and Transfused Blood Volume Proinflammatory Cytokines Antiinflammatory Cytokines Chemokines DAMPs Other Factors Transfusion.Vol.ml. vs. Postop Fold Changes Drained ml Hospital Stay Age IL-1β IL-2 IL-6 IL-12p70 IL-17A IFN-γ TNF-α IL-4 IL-5 IL-9 IL-10 IL-13 IL-1RA TGF-β1 IL-8 MCP-1 MIP-1α HSP-27 HSP-70 HSP-60 Annexin A2 S100-A8/A9 sIL-6R Sgp130 ADAM-17 sCD-14 CD-24 Siglec-10 C5a Lysozyme ASBT r 0.09 0.24 - 0.15 0.10 0.08 - 0.23 - 0.45 - 0.02 - 0.25 0.27 0.34 0.20 - 0.02 0.25 0.18 0.17 0.24 - 0.01 - 0.26 0.00 0.08 - 0.03 0.13 - 0.14 - 0.16 0.07 0.09 0.20 0.14 0.007 - 0.17 0.004 - 0.42 p 0.68 0.25 0.48 0.65 0.70 0.28 0.04 0.94 0.28 0.19 0.09 0.34 0.93 0.22 0.38 0.40 0.26 0.95 0.22 1.00 0.70 0.90 0.57 0.50 0.45 0.74 0.68 0.34 0.51 0.97 0.41 0.99 0.04 153 Chapter - VII Appendices APPENDIX – IV : PRE- AND POST-OPERATIVE LEVELS OF DIFFERENT BIOMARKERS (MEAN ± SD) Table 7.4 : Pre- and Post-Operative Levels of Different Biomarkers Biomarker Name ProInflammatory Cytokines AntiInflammatory Cytokines Chemokines DAMPs Other Biomarkers NSBT n Preoperative Postoperative IL-1β (pg/ml) 18 128.7 ± 164.6 77.87 ± 104.2 IL-2 (pg/ml) 18 158.9 ± 159.5 IL-6 (pg/ml) 18 IL-12p70 (pg/ml) ASBT p n Preoperative Postoperative p 0.03 25 19.39 ± 13.25 44.73 ± 35.15 <0.0001 62.49 ± 60.48 0.005 25 21.32 ± 19.3 39.57 ± 28.77 <0.0001 7.58 ± 11.22 23.32 ± 17.73 0.0001 25 4.76 ± 4.04 19.93 ± 12.34 <0.0001 17 13.14 ± 20.85 13.11 ± 20.16 0.82 21 18.31 ± 16.57 17 ± 15.25 IL-17A (pg/ml) 18 76.12 ± 127.9 44.99 ± 79.89 0.04 23 8.64 ± 7.31 19.01 ± 24.91 0.0001 IL-22 (pg/ml) 5 361.8 ± 343.3 277.4 ± 146.6 0.06 15 55.52 ± 42.12 127.0 ± 87.0 <0.0001 IFN-γ (pg/ml) 11 723.4 ± 1135 219.9 ± 344.5 0.052 21 23.81 ± 20.08 54.66 ± 33.65 <0.0001 TNF-α (pg/ml) 18 65.52 ± 136.4 27.47 ± 55.95 0.009 24 3.67 ± 2.80 8.846 ± 6.12 <0.0001 IL-4 (pg/ml) 18 192.9 ± 232.2 204,.1 ± 183.1 0.28 25 123.3 ± 83.32 96.36 ± 73.44 0.006 IL-5 (pg/ml) 18 29.88 ± 35.59 33.82 ± 21.12 0.01 25 20.8 ± 21.23 11.86 ± 12.65 <0.0001 IL-9 (pg/ml) 15 340 ± 953.2 66.45 ± 70.14 0.60 21 20.58 ± 15.07 12.46 ± 7.28 0.0005 IL-10 (pg/ml) 18 48.66 ± 94.82 30.69 ± 42.11 0.01 25 9.9 ± 6.482 6.31 ± 5.26 0.0002 IL-13 (pg/ml) 18 143 ± 92.11 142.6 ± 91.82 0.94 24 70.89 ± 47.95 44.53 ± 32.71 0.0004 IL-1ra (pg/ml) 18 178.3 ± 100.7 210.9 ± 71.86 0.004 25 127.1 ± 23.77 174.2 ± 61.08 <0.0001 TGF-β1 (ng/ml) 18 11.53 ± 4.48 10.67 ± 1.90 0.92 25 12.63 ± 6.88 12.83 ± 2.50 0.06 IL-8 (pg/ml) 18 22.97 ± 43.08 26.72 ± 36.02 0.0006 25 26.46 ± 36.42 35.27 ± 36.59 <0.0001 MCP-1 (pg/ml) 16 147.3 ± 105.6 165.5 ± 126.3 0.12 25 131.6 ± 84.65 189.1 ± 114.6 0.0007 MIP-1α (pg/ml) 18 33.51 ± 60.29 30.74 ± 48.99 0.03 25 16.58 ± 16.87 16.42 ± 8.83 0.02 HMGB-1 (ng/ml) 17 27.92 ± 7.85 13.31 ± 5.24 <0.0001 23 41.96 ± 18.36 25.21 ± 12.02 <0.0001 HSP-27 (ng/ml) 18 3.39 ± 1.48 3.70 ± 1.50 <0.0001 25 4.15 ± 2.58 4.42 ± 1.74 <0.0001 HSP-60 (ng/ml) 14 5.65 ± 7.61 4.33 ± 5.96 0.0002 22 6.34 ± 10.15 6.61 ± 8.75 <0.0001 HSP-70 (ng/ml) 17 1.15 ± 0.53 1.86 ± 0.68 <0.0001 25 1.03 ± 0.30 1.86 ± 0.70 <0.0001 S100A8/A9 (ng/ml) 18 163 ± 87.46 521.7 ± 135.7 <0.0001 25 146 ± 71.29 455.4 ± 176.3 <0.0001 Annexin-A2(ng/ml) 18 1.95 ± 1.508 1.78 ± 1.09 <0.0001 25 2.05 ± 1.05 2.72 ± 1.26 <0.0001 α-Defensin ( ng/ml) 17 135.1 ± 91.04 150.6 ± 80.38 0.0002 23 130.9 ± 28.74 156.3 ± 35.37 <0.0001 sIL-6R (ng/ml) 18 39.95 ± 9.304 34.05 ± 8.13 0.002 25 38.91 ± 7.912 33.66 ± 9.066 0.001 sgp130 (ng/ml) 18 163.7 ± 23.89 144.7 ± 17.81 0.01 24 173.0 ± 33.01 161.3 ± 23.71 0.02 ADAM-17 (ng/ml) 18 0.97 ± 1.35 0.78 ± 0.82 0.30 25 0.37 ± 0.47 0.39 ± 0.37 0.01 sCD-14 (µg/ml) 18 1.37 ± 0.29 2.043 ± 0.56 <0.0001 25 1.107 ± 0.23 1.82 ± 0.44 <0.0001 CD-24 ng/ml) 18 125.7 ± 89.06 461.6 ± 153.0 <0.0001 25 148.9 ± 82.65 577.4 ± 275.6 <0.0001 Siglec-10 (ng/ml 18 25.23 ± 77.23 49.34 ± 70.39 <0.0001 25 7.65 ± 6.01 35.35 ± 17.82 <0.0001 Siglec-2 (ng/ml) 2 5.73 ± 1.80 8.54 ± 2.22 0.30 3 7.54 ± 4.79 10.37 ± 7.39 0.61 C5a (ng/ml) 18 17.68 ± 4.08 21.62 ± 3.51 0.0002 25 14.39 ± 6.45 28.07 ± 8.88 <0.0001 Lysozyme (IU/ml) 18 1591 ± 359.3 1745 ± 214.3 0.04 25 1689 ± 238.1 1733 ± 340.1 0.002 0.93 154 Chapter - VII Appendices APPENDIX – V: LEVELS OF DIFFERENT BIOMARKERS IN PERIPHERAL AND SALVAGED BLOOD (MEAN ± SD) Table 7.5 : Levels of Different Biomarkers in Peripheral and Salvaged Blood n Peripheral WSB TSB p value (WSB vs Peripheral) p value (TSB vs Peripheral) p value (WSB vs TSB) IL-1β (pg/ml) 25 19.39 ± 13.25 22.05 ± 22.72 51.16 ± 42.63 0.002 <0.0001 <0.0001 IL-2 (pg/ml) 23 23.01 ± 19.21 36.98 ± 24.07 46.91 ± 41.61 <0.0001 <0.0001 0.04 IL-6 (pg/ml) 25 4.764 ± 4.037 352.8 ± 687.9 4780 ± 3211 <0.0001 <0.0001 <0.0001 IL-12p70 (pg/ml) 23 17.4 ± 16.24 20.54 ± 12.81 17.03 ± 9.59 <0.0001 <0.0001 0.005 IL-17A (pg/ml) 22 7.75 ± 6.07 14.92 ± 13.41 26.16 ± 20.23 <0.0001 <0.0001 <0.0001 IL-22 (pg/ml) 15 48.39 ± 44.09 315.1 ± 248.7 483.1 ± 454.2 <0.0001 <0.0001 0.0001 IFN-γ (pg/ml) 22 22.8 ± 20.16 107.9 ± 257.7 146.7 ± 217.1 <0.0001 <0.0001 0.0004 TNF-α (pg/ml) 21 3.909 ± 2.76 15.14 ± 17.94 26.99 ± 19.55 <0.0001 <0.0001 <0.0001 IL-4 (pg/ml) 25 123.3 ± 83.32 148 ± 128.3 182.8 ± 161.2 0.0001 <0.0001 0.03 IL-5 (pg/ml) 25 20.8 ± 21.23 16.99 ± 18.87 20.22 ± 23.86 0.04 0.002 0.09 IL-9 (pg/ml) 22 19.7 ± 15.27 32.26 ± 30.5 39.12 ± 42.05 <0.0001 <0.0001 0.054 IL-10 (pg/ml) 25 9.9 ± 6.48 34.27 ± 38.13 41.1 ± 26.64 <0.0001 <0.0001 0.005 IL-13 (pg/ml) 24 70.89 ± 47.95 32.06 ± 36.17 42.01 ± 43.75 0.14 0.83 0.11 IL-1ra (pg/ml) 25 127.1 ± 23.77 254.1 ± 103.2 355.9 ± 240.7 <0.0001 <0.0001 0.03 TGF-β1 (ng/ml) 25 12.63 ± 6.88 64.49 ± 40.29 72.62 ± 34.71 <0.0001 <0.0001 0.002 IL-8 (pg/ml) 25 27.47 ± 36.84 128.1 ± 187.3 1012 ± 747.6 0.002 <0.0001 <0.0001 MCP-1 (pg/ml) 25 131.6 ± 84.65 770 ± 830.4 3410 ± 3488 <0.0001 <0.0001 <0.0001 MIP-1α (pg/ml) 25 16.58 ± 16.87 69.64 ± 60.32 105.3 ± 76.76 <0.0001 <0.0001 <0.0001 HMGB-1 (ng/ml) 25 4.86 ± 1.23 51.31 ± 31.52 35.58 ± 13.51 <0.0001 <0.0001 0.0006 α-Defensin (ng/ml) 23 48.16 ± 71.25 438.1 ± 381 485.4 ± 228.9 <0.0001 <0.0001 0.08 HSP-27 (ng/ml) 25 4.154 ± 2.58 258.3 ± 152.4 221.5 ± 162.7 <0.0001 <0.0001 0.10 HSP-60 (ng/ml) 23 6.192 ± 9.94 35.65 ± 21.14 37.39 ± 19.31 <0.0001 <0.0001 0.63 HSP-70 (ng/ml) 25 1.028 ± 0.30 73.55 ± 42.39 61.87 ± 27.95 <0.0001 <0.0001 0.16 S100A8/A9 (ng/ml) 25 142.1 ± 75.63 686.7 ± 385.4 713.9 ± 381.1 <0.0001 <0.0001 0.68 Annexin-A2(ng/ml) 25 2.052 ± 1.05 2.273 ± 0.93 2.531 ± 0.85 <0.0001 <0.0001 0.004 sIL-6R (ng/ml) 25 38.91 ± 7.91 30.41 ± 8.15 32.18 ± 10.43 <0.0001 <0.0001 0.31 sgp130 (ng/ml) 25 173.0 ± 33.01 208.5 ± 40.37 215.9 ± 52.28 <0.0001 <0.0001 0.15 ADAM-17 (ng/ml) 25 0.37 ± 0.47 0.63 ± 0.54 0.54 ± 0.50 <0.0001 <0.0001 0.03 sCD-14 (µg/ml) 25 1.11 ± 0.23 0.83 ± 0.16 0.89 ± 0.19 <0.0001 <0.0001 0.04 CD-24 (ng/ml) 25 148.9 ± 82.65 984.5 ± 462.0 1068 ± 463.1 <0.0001 <0.0001 0.14 Siglec-10 (ng/ml) 25 7.65 ± 6.01 92.89 ± 44.65 101.3 ± 47.53 <0.0001 <0.0001 0.11 Siglec-2 (ng/ml) 3 7.54 ± 4.79 12.53 ± 9.61 13.42 ± 7.71 0.17 0.12 0.51 C5a (ng/ml) 25 14.39 ± 6.45 18.61 ± 6.60 18.62 ± 6.87 <0.0001 <0.0001 0.46 Lysozyme (IU/ml) 25 1689 ± 238.1 1347 ± 356.4 1463 ± 341.8 <0.0001 <0.0001 0.003 KGF ( pg/ml ) 25 3.55 ± 10.98 130.3 ± 80.88 94.02 ± 47.56 <0.0001 <0.0001 0.0001 Biomarker Name ProInflammatory Cytokines AntiInflammatory Cytokines Chemokines DAMPs Other Biomarkers 155 Chapter - VII Appendices APPENDIX – VI : IN VITRO STUDIES ON sCD14, IL-1β, AND TNF-α PRODUCTIONS BY FRESH PBMCs AND HUMAN WHOLE BLOOD CULTURE (a) PBMC s C D - 1 4 [n g /m l] 6 C o n tr o l L P S 3 n g /m l 4 L P S 1 0 n g /m l 2 r h r 8 h 4 4 2 1 2 6 h h r r 0 H o u r In c u b a tio n (b) H u m a n W h o le B lo o d C o n tr o l s C D - 1 4 [n g /m l] 50 L P S 1 0 n g /m l 40 30 20 10 r r h 8 4 4 2 1 2 h h r r h 6 0 h r 0 H o u r In c u b a tio n Figure 7.1: Effect of LPS addition on sCD-14 production by fresh PBMCs and human whole blood culture. (a) Levels of sCD-14 produced by freshly separated PBMCs cultured for different incubation periods -/+ LPS stimulation. (b) Levels of sCD-14 produced by diluted human whole blood cultured for different incubation periods. Data shown as Mean ± SD in ng/ml in box-whisker plot 156 Chapter - VII Appendices (a) PBMC 1500 T N F - [ p g /m l] C o n tro l L P S 3 n g /m l L P S 1 0 n g /m l 1500 1000 500 C o n tro l L P S 3 n g /m l L P S 1 0 n g /m l 1000 500 r h 8 4 2 1 4 h 2 6 h r r h r h 8 2 4 2 h h r r r h 6 1 4 H o u r In c u b a t io n H o u r In c u b a t io n (d) H u m a n W h o le B lo o d H u m a n W h o le B lo o d 1000 C o n tr o l C o n tr o l 1 r h h 6 h h 8 4 0 r r 4 2 1 2 h h r r 6 h r h 0 H o u r In c u b a tio n 8 0 4 0 h 200 r 200 r 400 4 400 600 2 600 L P S 1 0 n g /m l 800 r T N F - [ p g /m l] L P S 1 0 n g /m l 800 h 1000 r (c) IL -1 [ p g /m l] r 0 0 2 IL -1 [ p g /m l] (b) PBMC H o u r In c u b a tio n Figure 7.2: Effect of LPS addition on pro-inflammatory cytokine production by fresh PBMCs. (a) and (b) Levels of IL-1β and TNF-α produced by freshly separated PBMCs cultured for different incubation periods with or without treatment with LPS. (c) and (d) Levels of IL-1β and TNF-α in the whole blood culture supernatants following different incubation periods. Data showed as Mean ± SD in µg/ml in boxwhisker plot. 157 Chapter - VII Appendices APPENDIX – VII : SIMULATION OF SALVAGED BLOOD COLLECTION CONDITIONS. Samples of pre-operative blood from patients were collected in ACD and incubated at room temperature for zero and five hours to simulate collection conditions for WSB and TSB. Plasma samples were separated and cryopreserved and subsequently assayed for biomarkers by Flow-Cytometric Bead Array and ELISA. Figure 7.3: Simulated Salvaged Blood Results. Fold changes plotted on a Log10 scale were derived by dividing five-hour with zero-hour results, as follows: (a) DAMPs; (b) Chemokines; (c) Pro-inflammatory cytokines; and (d) Anti-inflammatory cytokines. Analyses were by one sample t-test (* = p <0·05; ** = p <0·001; *** = p <0·0001). 158 Chapter - VII Appendices (e) 100 (g) 10 1 10] 10 F o ld C h a n g e [ L o g F o ld C h a n g e [ L o g 10] F o ld C h a n g e [ L o g 10 10] (f) 1 1 0 .1 0 .1 4 7 A D s A C D M 1 -1 3 1 p g s s IL IL -6 -2 R 0 2 0 .1 (h) (j) (i) 10 10 10 F o ld C h a n g e [ L o g F o ld C h a n g e [ L o g * 1 10] F o ld C h a n g e [ L o g 10] 10] ** 1 0 .1 1 0 .1 m zy a 5 L y s o C S ig C le D c -1 -2 0 4 e 0 .1 Figure 7.3 (Continued): Simulated Salvaged Blood Results. Fold changes plotted on a Log10 scale were derived by dividing five-hour with zero-hour results, as follows: (e) IL-22; (f) sIL-6R, sgp130, and ADAM-17; (g) sCD-14; (h) CD-24 and Siglec-10; (i) C5a; and (j) Lysozyme. Analyses were by one sample t-test (* = p <0·05; ** = p <0·001; *** = p <0·0001). 159 Chapter - VII Appendices APPENDIX – VIII : EFFECT OF LYSOZYME ON PRODUCTIONS OF DIFFERENT BIOMARKERS IN HUMAN WHOLE BLOOD CULTURE ACD-anticoagulated human whole blood was treated with or without lysozyme (10 IU/ml) for 0, 6, 10, and 24 hours. Supernatants were then measured for different Biomarkers. And the promising antimicrobial activities of lysozyme found as shown in the figures. Figure 7.4: Effect of lysozyme on production of different Biomarkers in human whole blood culture. Levels of different Biomarkers produced by human whole blood cultured for 0, 6, 10, and 24 hour incubation periods with or without treatment with Lysozyme. (A) Pro-inflammatory cytokines, (B) Antiinflammatory Cytokines, and (C) Chemokines Data showed as Mean {Log10 scale] in pg/ml. 160 Chapter - VII Appendices APPENDIX - IX : DETAILS OF BIOMARKERS ASSESSED BY TANDEM MASS TAGGING Table 7.6 : Details of Biomarkers Assessed by Tandem Mass Tagging 47.93 9.01 17.78 14.95 28.96 Postop vs. Preop 0.33 0.38 0.68 0.38 0.42 WSB vs. Preop 0.95 5.32 5.50 0.89 0.61 TSB vs. Preop 0.72 4.42 3.99 1.06 0.41 TSB vs. WSB 0.76 0.83 0.73 1.19 0.72 Preop 5hr vs. 0 hr 0.44 0.66 0.74 0.30 0.57 A8K050 62.08 0.51 0.60 0.46 0.77 0.63 A8K2T4 93.35 0.88 0.60 0.43 0.70 0.68 A8K477 66.77 0.82 0.76 0.67 0.92 0.69 A8K5J8 80.15 1.03 0.59 0.41 0.75 0.49 A8K8Z4 104.65 1.21 0.39 0.25 0.64 0.63 B0AZL7 65.96 0.51 0.71 0.56 0.78 0.77 B1Q387 5.86 0.95 2.18 2.15 0.98 0.89 B2R4M6 13.20 2.18 2.51 4.79 1.91 0.84 B2R4P2 22.19 0.43 6.09 4.86 0.80 0.79 B2R582 22.52 0.56 0.73 0.59 0.81 0.55 B2R5G8 14.80 0.70 0.26 0.27 1.05 0.35 B2R6V9 83.19 0.46 0.25 0.23 0.95 0.59 Accession MW [kDa] A4D2D2 A4UCS6 A4UCS8 A6XMH1 A6XND1 Description Procollagen C-endopeptidase enhancer OS=Homo sapiens GN=PCOLCE PE=4 SV=1 - [A4D2D2_HUMAN] Peroxiredoxin 6 (Fragment) OS=Homo sapiens PE=2 SV=1 - [A4UCS6_HUMAN] Enolase (Fragment) OS=Homo sapiens PE=2 SV=1 - [A4UCS8_HUMAN] Transthyretin OS=Homo sapiens PE=2 SV=1 - [A6XMH1_HUMAN] Insulin-like growth factor binding protein 3 isoform b OS=Homo sapiens PE=2 SV=1 - [A6XND1_HUMAN] cDNA FLJ75376, highly similar to Homo sapiens peptidoglycan recognition protein L (PGLYRP) mRNA OS=Homo sapiens PE=2 SV=1 - [A8K050_HUMAN] cDNA FLJ78207, highly similar to Human complement protein component C7 mRNA OS=Homo sapiens PE=2 SV=1 [A8K2T4_HUMAN] cDNA FLJ78571, highly similar to Homo sapiens sulfhydryl oxidase mRNA OS=Homo sapiens PE=2 SV=1 [A8K477_HUMAN] cDNA FLJ75066, highly similar to Homo sapiens complement component 1, subcomponent (C1R), mRNA OS=Homo sapiens PE=2 SV=1 - [A8K5J8_HUMAN] cDNA FLJ78071, highly similar to Human MHC class III complement component C6 mRNA OS=Homo sapiens PE=2 SV=1 - [A8K8Z4_HUMAN] cDNA, FLJ79457, highly similar to Insulin-like growth factor-binding proteincomplex acid labile chain OS=Homo sapiens PE=2 SV=1 - [B0AZL7_HUMAN] Ferritin (Fragment) OS=Homo sapiens GN=FTL PE=3 SV=1 - [B1Q387_HUMAN] cDNA, FLJ92148, highly similar to Homo sapiens S100 calcium binding protein A9 (calgranulin B) (S100A9), mRNA OS=Homo sapiens PE=4 SV=1 - [B2R4M6_HUMAN] cDNA, FLJ92164, highly similar to Homo sapiens peroxiredoxin 1 (PRDX1), mRNA OS=Homo sapiens PE=2 SV=1 [B2R4P2_HUMAN] cDNA, FLJ92374, highly similar to Homo sapiens C-type lectin domain family 3, member B (CLEC3B), mRNA OS=Homo sapiens PE=2 SV=1 - [B2R582_HUMAN] Serum amyloid A protein OS=Homo sapiens PE=2 SV=1 - [B2R5G8_HUMAN] cDNA, FLJ93141, highly similar to Homo sapiens coagulation factor XIII, A1 polypeptide (F13A1), mRNA OS=Homo sapiens PE=2 SV=1 - [B2R6V9_HUMAN] Here, MW = Molecular Weight; vs. = fold changes; Bold Numbers = Decreased (<2 folds); Black color numbers =Unhanged; and Highlighted Numbers = Increased (>2 folds). 161 Chapter - VII Appendices 45.70 Postop vs. Preop 0.66 WSB vs. Preop 0.59 TSB vs. Preop 0.48 TSB vs. WSB 0.74 Preop 5hr vs. 0 hr 0.73 B2R815 48.50 0.38 0.67 0.48 0.68 0.61 B2R888 40.02 1.14 0.75 0.58 0.84 0.68 B2R950 163.77 0.42 0.53 0.42 0.78 0.40 B2R9F2 45.07 0.42 0.48 0.40 0.81 0.35 B2RA39 64.35 1.14 0.56 0.54 0.96 0.47 B2RBZ5 50.64 0.96 0.59 0.53 0.88 0.70 B2RMS9 103.30 0.68 0.65 0.51 0.79 0.45 B3KTV0 67.94 0.67 2.64 1.72 0.73 0.73 B3KWB5 36.98 0.58 0.61 0.46 0.75 0.59 B3KX75 124.68 0.67 0.69 0.54 0.82 0.76 B4DF70 B4DKJ3 B4DMS3 B4DNT5 B4DPP8 B4DUI5 20.09 77.17 120.76 30.79 46.47 22.86 0.25 0.58 2.73 0.76 0.63 0.54 4.26 1.02 1.49 0.55 0.58 4.42 3.99 0.79 1.31 0.48 0.48 2.49 0.95 0.77 0.88 0.93 0.82 0.72 0.80 0.51 1.22 0.49 0.59 0.85 B4DUV1 70.11 0.64 0.63 0.41 0.66 0.53 B4DW08 54.43 0.48 0.64 0.47 0.72 0.41 B4DWH0 32.56 0.77 0.64 0.50 0.78 0.52 Accession MW [kDa] B2R701 Description cDNA, FLJ93202, Homo sapiens protease inhibitor 16 (PI16), mRNA OS=Homo sapiens PE=2 SV=1 - [B2R701_HUMAN] cDNA, FLJ93695, highly similar to Homo sapiens serpin peptidase inhibitor, clade A (alpha-1 antiproteinase, antitrypsin), member 4 (SERPINA4), mRNA OS=Homo sapiens PE=2 SV=1 - [B2R815_HUMAN] Monocyte differentiation antigen CD14 OS=Homo sapiens PE=2 SV=1 - [B2R888_HUMAN] cDNA, FLJ94213, highly similar to Homo sapiens pregnancy-zone protein (PZP), mRNA OS=Homo sapiens PE=2 SV=1 [B2R950_HUMAN] cDNA, FLJ94361, highly similar to Homo sapiens serine (or cysteine) proteinase inhibitor, clade A(alpha-1 antiproteinase, antitrypsin), member 6 (SERPINA6), mRNA OS=Homo sapiens PE=2 SV=1 - [B2R9F2_HUMAN] cDNA, FLJ94686, highly similar to Homo sapiens complement factor H-related 5 (CFHL5), mRNA OS=Homo sapiens PE=2 SV=1 - [B2RA39_HUMAN] cDNA, FLJ95778, highly similar to Homo sapiens serpin peptidase inhibitor, clade A (alpha-1 antiproteinase, antitrypsin), member 10 (SERPINA10), mRNA OS=Homo sapiens PE=2 SV=1 - [B2RBZ5_HUMAN] Inter-alpha (Globulin) inhibitor H4 (Plasma Kallikrein-sensitive glycoprotein) OS=Homo sapiens GN=ITIH4 PE=2 SV=1 [B2RMS9_HUMAN] cDNA FLJ38781 fis, clone LIVER2000216, highly similar to HEAT SHOCK COGNATE 71 kDa PROTEIN OS=Homo sapiens PE=2 SV=1 - [B3KTV0_HUMAN] cDNA FLJ42722 fis, clone BRAMY4000277, highly similar to Alpha-1B-glycoprotein OS=Homo sapiens PE=2 SV=1 [B3KWB5_HUMAN] cDNA FLJ44930 fis, clone BRAMY3015549, highly similar to Neural cell adhesion molecule L1-like protein (Fragment) OS=Homo sapiens PE=2 SV=1 - [B3KX75_HUMAN] cDNA FLJ60461, highly similar to Peroxiredoxin-2 (EC 1.11.1.15) OS=Homo sapiens PE=2 SV=1 - [B4DF70_HUMAN] Cartilage oligomeric matrix protein OS=Homo sapiens GN=COMP PE=2 SV=1 - [B4DKJ3_HUMAN] cDNA FLJ59036, highly similar to von Willebrand factor OS=Homo sapiens PE=2 SV=1 - [B4DMS3_HUMAN] cDNA FLJ60316, highly similar to Apolipoprotein-L1 OS=Homo sapiens PE=2 SV=1 - [B4DNT5_HUMAN] cDNA FLJ53075, highly similar to Kininogen-1 OS=Homo sapiens PE=2 SV=1 - [B4DPP8_HUMAN] Triosephosphate isomerase OS=Homo sapiens PE=2 SV=1 - [B4DUI5_HUMAN] cDNA FLJ53207, highly similar to Homo sapiens fibulin 1 (FBLN1), transcript variant C, mRNA OS=Homo sapiens PE=2 SV=1 - [B4DUV1_HUMAN] cDNA FLJ50886, highly similar to Aconitate hydratase, mitochondrial(EC 4.2.1.3) OS=Homo sapiens PE=2 SV=1 [B4DW08_HUMAN] cDNA FLJ55670, highly similar to EGF-containing fibulin-like extracellularmatrix protein 1 OS=Homo sapiens PE=2 SV=1 [B4DWH0_HUMAN] 162 Here, MW = Molecular Weight; vs. = fold changes; Bold Numbers = Decreased (<2 folds); Black color numbers =Unhanged; and Highlighted Numbers = Increased (>2 folds). Chapter - VII Appendices Accession MW [kDa] Postop vs. Preop WSB vs. Preop TSB vs. Preop TSB vs. WSB Preop 5hr vs. 0 hr B4DYT3 65.69 0.48 0.64 0.48 0.74 0.56 B4DZ36 B4E1B3 B4E1C2 129.75 51.03 71.87 0.55 0.94 1.03 0.55 0.65 0.35 0.38 0.47 0.26 0.70 0.71 0.61 0.87 0.80 0.59 B4E1C4 46.03 0.56 0.57 0.40 0.74 0.41 B4E1D8 B4E1I8 B4E1Z4 B4E335 60.37 36.47 140.85 39.20 0.14 2.21 0.88 0.68 0.26 0.66 0.64 3.98 0.22 0.48 0.44 2.84 0.93 0.74 0.70 0.70 0.03 0.82 0.71 0.65 B7Z549 75.46 0.59 0.66 0.51 0.80 0.67 B7Z550 B7Z7A9 B7Z7M2 B7ZLF0 60.10 41.40 14.96 239.47 0.80 0.55 0.39 0.66 0.56 5.45 0.42 0.29 0.35 3.30 0.27 0.24 0.62 0.59 0.66 0.82 0.58 0.83 0.33 0.73 B8ZZW2 107.03 0.91 0.71 0.64 0.91 0.68 C0JYY2 C9J9F8 D3JV41 D6RA08 D6REX5 D9IWP9 E0D852 E3SBK4 515.24 19.65 13.70 24.10 35.09 36.23 38.49 48.77 0.75 0.51 0.41 0.66 0.50 0.74 0.84 0.44 0.43 0.61 4.76 0.59 0.64 0.39 1.21 0.58 0.38 0.53 3.41 0.46 0.55 0.34 1.17 0.40 0.87 0.86 0.72 0.72 0.82 0.94 0.93 0.69 0.66 0.44 0.43 0.53 0.57 0.58 0.85 0.51 E3UN46 12.02 0.47 0.48 0.30 0.61 0.58 E7ERU0 615.27 0.68 1.48 1.12 0.75 0.72 Description cDNA FLJ59074, highly similar to Transcription initiation factor TFIID 105 kDa subunit OS=Homo sapiens PE=2 SV=1 [B4DYT3_HUMAN] cDNA FLJ58441, highly similar to Attractin OS=Homo sapiens PE=2 SV=1 - [B4DZ36_HUMAN] cDNA FLJ53950, highly similar to Angiotensinogen OS=Homo sapiens PE=2 SV=1 - [B4E1B3_HUMAN] Kininogen 1, isoform CRA_b OS=Homo sapiens GN=KNG1 PE=2 SV=1 - [B4E1C2_HUMAN] cDNA FLJ51179, highly similar to Vitamin K-dependent protein C (EC 3.4.21.69) OS=Homo sapiens PE=2 SV=1 [B4E1C4_HUMAN] cDNA FLJ51597, highly similar to C4b-binding protein alpha chain OS=Homo sapiens PE=2 SV=1 - [B4E1D8_HUMAN] cDNA FLJ54228, highly similar to Leucine-rich alpha-2-glycoprotein OS=Homo sapiens PE=2 SV=1 - [B4E1I8_HUMAN] Complement factor B OS=Homo sapiens GN=CFB PE=2 SV=1 - [B4E1Z4_HUMAN] cDNA FLJ52842, highly similar to Actin, cytoplasmic 1 OS=Homo sapiens PE=2 SV=1 - [B4E335_HUMAN] cDNA FLJ56821, highly similar to Inter-alpha-trypsin inhibitor heavy chain H1 OS=Homo sapiens PE=2 SV=1 [B7Z549_HUMAN] Complement component 8, beta polypeptide, isoform CRA_b OS=Homo sapiens GN=C8B PE=2 SV=1 - [B7Z550_HUMAN] Phosphoglycerate kinase OS=Homo sapiens GN=PGK1 PE=2 SV=1 - [B7Z7A9_HUMAN] cDNA FLJ51564, highly similar to Pregnancy zone protein OS=Homo sapiens PE=2 SV=1 - [B7Z7M2_HUMAN] Fibronectin 1 OS=Homo sapiens GN=FN1 PE=2 SV=1 - [B7ZLF0_HUMAN] GRIP and coiled-coil domain-containing protein 2 (Fragment) OS=Homo sapiens GN=GCC2 PE=4 SV=1 [B8ZZW2_HUMAN] Apolipoprotein B (Including Ag(X) antigen) OS=Homo sapiens GN=APOB PE=4 SV=1 - [C0JYY2_HUMAN] Coiled-coil domain-containing protein 173 (Fragment) OS=Homo sapiens GN=CCDC173 PE=4 SV=1 - [C9J9F8_HUMAN] Thrombocidin-2 antimicrobial variant (Fragment) OS=Homo sapiens PE=4 SV=1 - [D3JV41_HUMAN] Complement C1q subcomponent subunit B (Fragment) OS=Homo sapiens GN=C1QB PE=4 SV=1 - [D6RA08_HUMAN] Selenoprotein P (Fragment) OS=Homo sapiens GN=SEPP1 PE=4 SV=1 - [D6REX5_HUMAN] Beta-2-glycoprotein I (Fragment) OS=Homo sapiens PE=2 SV=1 - [D9IWP9_HUMAN] Platelet glycoprotein Ib alpha polypeptide type 2 OS=Homo sapiens GN=GP1BA PE=4 SV=1 - [E0D852_HUMAN] Zinc finger protein 645 OS=Homo sapiens GN=ZNF645 PE=2 SV=1 - [E3SBK4_HUMAN] Insulin-like growth factor II transcript variant 3 isoform 1 (Fragment) OS=Homo sapiens GN=IGF2 PE=2 SV=1 [E3UN46_HUMAN] Dystonin OS=Homo sapiens GN=DST PE=4 SV=1 - [E7ERU0_HUMAN] 163 Here, MW = Molecular Weight; vs. = fold changes; Bold Numbers = Decreased (<2 folds); Black color numbers =Unhanged; and Highlighted Numbers = Increased (>2 folds). Chapter - VII Accession MW [kDa] E7EUT5 E9PGP2 E9PLJ3 F2RM37 F5GY80 F5H6Q2 F5H6S5 F6KPG5 F8VQ14 F8VWU1 F8W1Q3 G3XAM2 H0Y509 H0YDX6 H0YL80 H3BR68 H6VRF8 I1VZV6 I2D5I8 I3L1J1 J3KRP0 K7EJ44 K7ELW0 K7ER74 K7ERI9 O43866 O60870 P00441 P00734 27.85 64.01 9.08 51.71 60.00 13.78 20.99 66.49 44.78 13.98 58.88 65.02 25.94 19.56 8.01 13.77 66.01 15.27 9.32 25.41 51.89 11.38 17.90 20.04 8.64 38.06 45.35 15.93 69.99 Appendices Postop vs. Preop 0.34 0.68 0.55 0.88 0.82 0.36 0.71 0.49 0.17 0.67 0.55 0.76 1.00 0.60 0.44 0.62 1.03 0.47 0.43 0.67 0.52 0.29 0.47 0.47 0.26 0.63 0.98 0.40 0.64 WSB vs. Preop 3.80 0.66 4.64 0.55 0.61 5.70 0.57 0.40 0.23 0.66 0.63 0.57 0.64 0.73 5.44 3.23 0.98 13.51 0.27 0.79 0.66 6.76 4.68 0.14 0.11 0.47 2.48 3.72 0.42 TSB vs. Preop 3.19 0.51 3.87 0.41 0.45 4.50 0.53 0.33 0.16 0.49 0.44 0.37 0.46 0.61 4.62 2.79 1.00 11.60 0.28 0.60 0.63 4.67 4.01 0.16 0.17 0.44 2.08 3.40 0.34 TSB vs. WSB 0.80 0.74 0.83 0.75 0.73 0.79 0.93 0.80 0.68 0.75 0.69 0.67 0.71 0.81 0.83 0.80 1.01 0.90 1.05 0.74 0.80 0.69 0.85 1.09 1.55 0.92 0.84 0.92 0.76 Preop 5hr vs. 0 hr 0.45 0.59 0.63 0.54 0.63 0.88 0.64 1.25 0.12 0.52 0.71 0.70 0.65 0.68 0.53 0.73 1.06 0.44 0.40 0.68 0.81 0.44 1.04 0.43 0.51 0.73 0.40 1.16 0.63 Description Glyceraldehyde-3-phosphate dehydrogenase OS=Homo sapiens GN=GAPDH PE=3 SV=1 - [E7EUT5_HUMAN] Coagulation factor XI OS=Homo sapiens GN=F11 PE=3 SV=1 - [E9PGP2_HUMAN] Cofilin-1 (Fragment) OS=Homo sapiens GN=CFL1 PE=4 SV=1 - [E9PLJ3_HUMAN] Coagulation factor IX OS=Homo sapiens GN=F9 p22 PE=2 SV=1 - [F2RM37_HUMAN] Complement component C8 beta chain OS=Homo sapiens GN=C8B PE=4 SV=1 - [F5GY80_HUMAN] Polyubiquitin-C (Fragment) OS=Homo sapiens GN=UBC PE=4 SV=1 - [F5H6Q2_HUMAN] Complement C1r subcomponent-like protein (Fragment) OS=Homo sapiens GN=C1RL PE=4 SV=1 - [F5H6S5_HUMAN] Albumin (Fragment) OS=Homo sapiens PE=2 SV=1 - [F6KPG5_HUMAN] T-complex protein 1 subunit beta OS=Homo sapiens GN=CCT2 PE=3 SV=1 - [F8VQ14_HUMAN] Alpha-lactalbumin OS=Homo sapiens GN=LALBA PE=3 SV=1 - [F8VWU1_HUMAN] Biotinidase OS=Homo sapiens GN=BTD PE=4 SV=1 - [F8W1Q3_HUMAN] Complement factor I light chain OS=Homo sapiens GN=CFI PE=3 SV=1 - [G3XAM2_HUMAN] Integral membrane protein GPR137B (Fragment) OS=Homo sapiens GN=GPR137B PE=4 SV=1 - [H0Y509_HUMAN] CD44 antigen (Fragment) OS=Homo sapiens GN=CD44 PE=4 SV=1 - [H0YDX6_HUMAN] Tropomyosin alpha-1 chain (Fragment) OS=Homo sapiens GN=TPM1 PE=4 SV=1 - [H0YL80_HUMAN] Fructose-bisphosphate aldolase A (Fragment) OS=Homo sapiens GN=ALDOA PE=4 SV=1 - [H3BR68_HUMAN] Keratin 1 OS=Homo sapiens GN=KRT1 PE=3 SV=1 - [H6VRF8_HUMAN] Hemoglobin alpha 1 OS=Homo sapiens GN=HBA1 PE=3 SV=1 - [I1VZV6_HUMAN] Apolipoprotein M (Fragment) OS=Homo sapiens GN=APOM PE=4 SV=1 - [I2D5I8_HUMAN] Sex hormone-binding globulin OS=Homo sapiens GN=SHBG PE=4 SV=1 - [I3L1J1_HUMAN] Beta-Ala-His dipeptidase OS=Homo sapiens GN=CNDP1 PE=4 SV=1 - [J3KRP0_HUMAN] Profilin 1, isoform CRA_b OS=Homo sapiens GN=PFN1 PE=4 SV=1 - [K7EJ44_HUMAN] Protein DJ-1 OS=Homo sapiens GN=PARK7 PE=4 SV=1 - [K7ELW0_HUMAN] Apolipoprotein C-IV OS=Homo sapiens GN=APOC4 PE=4 SV=1 - [K7ER74_HUMAN] Truncated apolipoprotein C-I (Fragment) OS=Homo sapiens GN=APOC1 PE=4 SV=1 - [K7ERI9_HUMAN] CD5 antigen-like OS=Homo sapiens GN=CD5L PE=1 SV=1 - [CD5L_HUMAN] DNA/RNA-binding protein KIN17 OS=Homo sapiens GN=KIN PE=1 SV=2 - [KIN17_HUMAN] Superoxide dismutase [Cu-Zn] OS=Homo sapiens GN=SOD1 PE=1 SV=2 - [SODC_HUMAN] Prothrombin OS=Homo sapiens GN=F2 PE=1 SV=2 - [THRB_HUMAN] Here, MW = Molecular Weight; vs. = fold changes; Bold Numbers = Decreased (<2 folds); Black color numbers =Unhanged; and Highlighted Numbers = Increased (>2 folds). 164 Chapter - VII Accession MW [kDa] P00738 P00742 P00747 P00915 P00918 P01008 P01009 P01011 P01023 P01024 P01031 P01034 P01834 P01860 P01871 P01876 P02042 P02452 P02647 P02649 P02652 P02656 P02671 P02675 P02679 P02741 P02743 P02745 P02747 P02748 P02760 P02763 45.18 54.70 90.51 28.85 29.23 52.57 46.71 47.62 163.19 187.03 188.19 15.79 11.60 41.26 49.28 37.63 16.05 138.86 30.76 36.13 11.17 10.85 94.91 55.89 51.48 25.02 25.37 26.00 25.76 63.13 38.97 23.50 Appendices Postop vs. Preop 0.67 0.66 0.62 0.24 0.27 0.65 6.11 2.01 0.12 0.97 0.78 0.60 0.18 0.20 0.20 0.11 0.24 0.50 0.15 0.77 0.23 0.37 0.47 0.41 0.36 23.61 0.88 0.71 0.59 2.10 0.78 4.51 WSB vs. Preop 0.30 0.50 0.36 4.03 3.82 0.43 0.36 0.67 0.23 0.76 0.62 0.93 0.44 0.34 0.33 0.20 26.91 7.37 0.17 0.47 0.15 0.18 5.03 4.56 5.01 0.81 0.65 0.57 0.52 0.74 0.60 0.22 TSB vs. Preop 0.30 0.34 0.27 3.17 3.37 0.30 0.25 0.47 0.24 0.66 0.45 0.61 0.40 0.33 0.32 0.22 22.82 4.00 0.23 0.42 0.27 0.16 3.91 3.70 3.75 0.28 0.50 0.41 0.39 0.65 0.46 0.13 TSB vs. WSB 0.98 0.69 0.69 0.78 0.86 0.73 0.60 0.70 1.00 0.84 0.71 0.65 0.91 0.99 0.99 1.15 0.84 0.56 1.35 0.90 1.95 0.91 0.75 0.84 0.77 0.32 0.77 0.72 0.74 0.87 0.76 0.61 Preop 5hr vs. 0 hr 0.04 0.61 0.72 1.10 1.14 0.79 0.22 0.72 0.06 0.47 0.68 0.32 0.03 0.15 0.10 0.01 0.27 0.51 0.09 0.61 0.20 0.36 0.13 0.22 0.13 0.63 0.61 0.55 0.54 0.69 0.69 0.11 Description Haptoglobin OS=Homo sapiens GN=HP PE=1 SV=1 - [HPT_HUMAN] Coagulation factor X OS=Homo sapiens GN=F10 PE=1 SV=2 - [FA10_HUMAN] Plasminogen OS=Homo sapiens GN=PLG PE=1 SV=2 - [PLMN_HUMAN] Carbonic anhydrase 1 OS=Homo sapiens GN=CA1 PE=1 SV=2 - [CAH1_HUMAN] Carbonic anhydrase 2 OS=Homo sapiens GN=CA2 PE=1 SV=2 - [CAH2_HUMAN] Antithrombin-III OS=Homo sapiens GN=SERPINC1 PE=1 SV=1 - [ANT3_HUMAN] Alpha-1-antitrypsin OS=Homo sapiens GN=SERPINA1 PE=1 SV=3 - [A1AT_HUMAN] Alpha-1-antichymotrypsin OS=Homo sapiens GN=SERPINA3 PE=1 SV=2 - [AACT_HUMAN] Alpha-2-macroglobulin OS=Homo sapiens GN=A2M PE=1 SV=3 - [A2MG_HUMAN] Complement C3 OS=Homo sapiens GN=C3 PE=1 SV=2 - [CO3_HUMAN] Complement C5 OS=Homo sapiens GN=C5 PE=1 SV=4 - [CO5_HUMAN] Cystatin-C OS=Homo sapiens GN=CST3 PE=1 SV=1 - [CYTC_HUMAN] Ig kappa chain C region OS=Homo sapiens GN=IGKC PE=1 SV=1 - [IGKC_HUMAN] Ig gamma-3 chain C region OS=Homo sapiens GN=IGHG3 PE=1 SV=2 - [IGHG3_HUMAN] Ig mu chain C region OS=Homo sapiens GN=IGHM PE=1 SV=3 - [IGHM_HUMAN] Ig alpha-1 chain C region OS=Homo sapiens GN=IGHA1 PE=1 SV=2 - [IGHA1_HUMAN] Hemoglobin subunit delta OS=Homo sapiens GN=HBD PE=1 SV=2 - [HBD_HUMAN] Collagen alpha-1(I) chain OS=Homo sapiens GN=COL1A1 PE=1 SV=5 - [CO1A1_HUMAN] Apolipoprotein A-I OS=Homo sapiens GN=APOA1 PE=1 SV=1 - [APOA1_HUMAN] Apolipoprotein E OS=Homo sapiens GN=APOE PE=1 SV=1 - [APOE_HUMAN] Apolipoprotein A-II OS=Homo sapiens GN=APOA2 PE=1 SV=1 - [APOA2_HUMAN] Apolipoprotein C-III OS=Homo sapiens GN=APOC3 PE=1 SV=1 - [APOC3_HUMAN] Fibrinogen alpha chain OS=Homo sapiens GN=FGA PE=1 SV=2 - [FIBA_HUMAN] Fibrinogen beta chain OS=Homo sapiens GN=FGB PE=1 SV=2 - [FIBB_HUMAN] Fibrinogen gamma chain OS=Homo sapiens GN=FGG PE=1 SV=3 - [FIBG_HUMAN] C-reactive protein OS=Homo sapiens GN=CRP PE=1 SV=1 - [CRP_HUMAN] Serum amyloid P-component OS=Homo sapiens GN=APCS PE=1 SV=2 - [SAMP_HUMAN] Complement C1q subcomponent subunit A OS=Homo sapiens GN=C1QA PE=1 SV=2 - [C1QA_HUMAN] Complement C1q subcomponent subunit C OS=Homo sapiens GN=C1QC PE=1 SV=3 - [C1QC_HUMAN] Complement component C9 OS=Homo sapiens GN=C9 PE=1 SV=2 - [CO9_HUMAN] Protein AMBP OS=Homo sapiens GN=AMBP PE=1 SV=1 - [AMBP_HUMAN] Alpha-1-acid glycoprotein 1 OS=Homo sapiens GN=ORM1 PE=1 SV=1 - [A1AG1_HUMAN] 165 Here, MW = Molecular Weight; vs. = fold changes; Bold Numbers = Decreased (<2 folds); Black color numbers =Unhanged; and Highlighted Numbers = Increased (>2 folds). Chapter - VII Accession MW [kDa] P02765 P02774 P02776 P02790 P03952 P04004 P04040 P04196 P04217 P04220 P05109 P05160 P05452 P05543 P05546 P06276 P06396 P06681 P06703 P06727 P07195 P07355 P07357 P07360 P07477 P07738 P07996 P08123 P08519 P08603 P08670 39.30 52.93 10.84 51.64 71.32 54.27 59.72 59.54 54.22 43.03 10.83 75.46 22.52 46.29 57.03 68.37 85.64 83.21 10.17 45.37 36.62 38.58 65.12 22.26 26.54 29.99 129.30 129.24 501.00 139.00 53.62 Appendices Postop vs. Preop 0.47 0.74 0.55 0.71 0.41 0.81 0.46 0.40 0.72 0.15 1.06 0.51 0.52 0.56 0.48 0.43 0.57 0.80 0.44 0.48 0.53 0.60 1.00 0.96 0.70 0.55 0.65 0.77 0.83 0.67 0.56 WSB vs. Preop 0.57 0.58 4.27 0.62 0.49 0.49 2.84 0.46 0.61 0.30 1.08 0.56 0.66 0.65 0.58 0.65 0.69 0.64 3.85 0.61 2.02 7.27 0.63 0.68 0.93 2.55 7.73 5.24 0.60 0.49 17.31 TSB vs. Preop 0.43 0.43 3.08 0.43 0.37 0.40 2.46 0.41 0.45 0.32 1.63 0.39 0.52 0.43 0.42 0.44 0.56 0.49 2.96 0.47 1.55 4.38 0.45 0.59 0.78 2.41 6.12 3.08 0.43 0.34 9.23 TSB vs. WSB 0.73 0.70 0.72 0.70 0.76 0.76 0.80 0.84 0.73 1.05 1.50 0.65 0.78 0.66 0.74 0.68 0.80 0.73 0.77 0.76 0.79 0.61 0.73 0.84 0.84 0.93 0.86 0.59 0.68 0.70 0.54 Preop 5hr vs. 0 hr 0.52 0.74 0.61 0.83 0.52 0.53 0.98 0.47 0.78 0.06 0.72 0.53 0.60 0.77 0.53 0.80 0.59 0.75 0.74 0.49 0.46 0.73 0.69 0.68 0.66 0.83 0.79 0.74 0.57 0.63 0.72 Description Alpha-2-HS-glycoprotein OS=Homo sapiens GN=AHSG PE=1 SV=1 - [FETUA_HUMAN] Vitamin D-binding protein OS=Homo sapiens GN=GC PE=1 SV=1 - [VTDB_HUMAN] Platelet factor 4 OS=Homo sapiens GN=PF4 PE=1 SV=2 - [PLF4_HUMAN] Hemopexin OS=Homo sapiens GN=HPX PE=1 SV=2 - [HEMO_HUMAN] Plasma kallikrein OS=Homo sapiens GN=KLKB1 PE=1 SV=1 - [KLKB1_HUMAN] Vitronectin OS=Homo sapiens GN=VTN PE=1 SV=1 - [VTNC_HUMAN] Catalase OS=Homo sapiens GN=CAT PE=1 SV=3 - [CATA_HUMAN] Histidine-rich glycoprotein OS=Homo sapiens GN=HRG PE=1 SV=1 - [HRG_HUMAN] Alpha-1B-glycoprotein OS=Homo sapiens GN=A1BG PE=1 SV=4 - [A1BG_HUMAN] Ig mu heavy chain disease protein OS=Homo sapiens PE=1 SV=1 - [MUCB_HUMAN] Protein S100-A8 OS=Homo sapiens GN=S100A8 PE=1 SV=1 - [S10A8_HUMAN] Coagulation factor XIII B chain OS=Homo sapiens GN=F13B PE=1 SV=3 - [F13B_HUMAN] Tetranectin OS=Homo sapiens GN=CLEC3B PE=1 SV=3 - [TETN_HUMAN] Thyroxine-binding globulin OS=Homo sapiens GN=SERPINA7 PE=1 SV=2 - [THBG_HUMAN] Heparin cofactor 2 OS=Homo sapiens GN=SERPIND1 PE=1 SV=3 - [HEP2_HUMAN] Cholinesterase OS=Homo sapiens GN=BCHE PE=1 SV=1 - [CHLE_HUMAN] Gelsolin OS=Homo sapiens GN=GSN PE=1 SV=1 - [GELS_HUMAN] Complement C2 OS=Homo sapiens GN=C2 PE=1 SV=2 - [CO2_HUMAN] Protein S100-A6 OS=Homo sapiens GN=S100A6 PE=1 SV=1 - [S10A6_HUMAN] Apolipoprotein A-IV OS=Homo sapiens GN=APOA4 PE=1 SV=3 - [APOA4_HUMAN] L-lactate dehydrogenase B chain OS=Homo sapiens GN=LDHB PE=1 SV=2 - [LDHB_HUMAN] Annexin A2 OS=Homo sapiens GN=ANXA2 PE=1 SV=2 - [ANXA2_HUMAN] Complement component C8 alpha chain OS=Homo sapiens GN=C8A PE=1 SV=2 - [CO8A_HUMAN] Complement component C8 gamma chain OS=Homo sapiens GN=C8G PE=1 SV=3 - [CO8G_HUMAN] Trypsin-1 OS=Homo sapiens GN=PRSS1 PE=1 SV=1 - [TRY1_HUMAN] Bisphosphoglycerate mutase OS=Homo sapiens GN=BPGM PE=1 SV=2 - [PMGE_HUMAN] Thrombospondin-1 OS=Homo sapiens GN=THBS1 PE=1 SV=2 - [TSP1_HUMAN] Collagen alpha-2(I) chain OS=Homo sapiens GN=COL1A2 PE=1 SV=7 - [CO1A2_HUMAN] Apolipoprotein(a) OS=Homo sapiens GN=LPA PE=1 SV=1 - [APOA_HUMAN] Complement factor H OS=Homo sapiens GN=CFH PE=1 SV=4 - [CFAH_HUMAN] Vimentin OS=Homo sapiens GN=VIM PE=1 SV=4 - [VIME_HUMAN] 166 Here, MW = Molecular Weight; vs. = fold changes; Bold Numbers = Decreased (<2 folds); Black color numbers =Unhanged; and Highlighted Numbers = Increased (>2 folds). Chapter - VII Accession MW [kDa] P08697 P09172 P09871 P0CG05 P10909 P11021 P12259 P13645 P13671 P15090 P15169 P19652 P22352 P22792 P22891 P23142 P25311 P26447 P26927 P27169 P27918 P30043 P35527 P36955 P36980 P43652 P48740 P51884 P54108 54.53 69.02 76.63 11.29 52.46 72.29 251.55 58.79 104.72 14.71 52.25 23.59 25.54 60.52 44.71 77.16 34.24 11.72 80.27 39.71 51.24 22.11 62.03 46.28 30.63 69.02 79.20 38.40 27.61 Appendices Postop vs. Preop 0.71 0.60 1.04 0.12 0.43 0.59 0.66 1.15 1.18 0.35 0.79 3.94 0.81 0.76 0.67 0.96 0.78 0.32 0.80 0.23 0.56 0.38 0.90 0.76 0.79 0.51 0.77 0.61 0.56 WSB vs. Preop 0.25 0.65 0.63 0.26 0.64 1.23 1.03 0.69 0.51 6.66 0.64 0.23 0.77 0.60 0.58 0.81 0.58 6.33 0.57 0.57 0.51 3.58 1.59 0.65 0.57 0.53 0.57 0.69 0.56 TSB vs. Preop 0.20 0.48 0.47 0.27 0.52 0.94 0.84 0.63 0.42 3.69 0.44 0.16 0.60 0.44 0.40 0.66 0.46 4.48 0.44 0.74 0.40 3.05 1.44 0.47 0.39 0.38 0.42 0.52 0.40 TSB vs. WSB 0.75 0.76 0.75 1.07 0.80 0.76 0.86 0.94 0.72 0.55 0.70 0.73 0.78 0.71 0.71 0.81 0.77 0.71 0.76 1.22 0.76 0.88 0.95 0.74 0.70 0.69 0.72 0.77 0.70 Preop 5hr vs. 0 hr 0.49 0.84 0.63 0.01 0.27 0.68 0.38 0.71 0.67 0.33 0.71 0.13 0.63 0.67 0.55 0.58 0.77 0.81 0.67 0.16 0.71 0.81 1.30 0.75 0.62 0.77 0.68 0.70 0.75 Description Alpha-2-antiplasmin OS=Homo sapiens GN=SERPINF2 PE=1 SV=3 - [A2AP_HUMAN] Dopamine beta-hydroxylase OS=Homo sapiens GN=DBH PE=1 SV=3 - [DOPO_HUMAN] Complement C1s subcomponent OS=Homo sapiens GN=C1S PE=1 SV=1 - [C1S_HUMAN] Ig lambda-2 chain C regions OS=Homo sapiens GN=IGLC2 PE=1 SV=1 - [LAC2_HUMAN] Clusterin OS=Homo sapiens GN=CLU PE=1 SV=1 - [CLUS_HUMAN] 78 kDa glucose-regulated protein OS=Homo sapiens GN=HSPA5 PE=1 SV=2 - [GRP78_HUMAN] Coagulation factor V OS=Homo sapiens GN=F5 PE=1 SV=4 - [FA5_HUMAN] Keratin, type I cytoskeletal 10 OS=Homo sapiens GN=KRT10 PE=1 SV=6 - [K1C10_HUMAN] Complement component C6 OS=Homo sapiens GN=C6 PE=1 SV=3 - [CO6_HUMAN] Fatty acid-binding protein, adipocyte OS=Homo sapiens GN=FABP4 PE=1 SV=3 - [FABP4_HUMAN] Carboxypeptidase N catalytic chain OS=Homo sapiens GN=CPN1 PE=1 SV=1 - [CBPN_HUMAN] Alpha-1-acid glycoprotein 2 OS=Homo sapiens GN=ORM2 PE=1 SV=2 - [A1AG2_HUMAN] Glutathione peroxidase 3 OS=Homo sapiens GN=GPX3 PE=1 SV=2 - [GPX3_HUMAN] Carboxypeptidase N subunit 2 OS=Homo sapiens GN=CPN2 PE=1 SV=3 - [CPN2_HUMAN] Vitamin K-dependent protein Z OS=Homo sapiens GN=PROZ PE=1 SV=2 - [PROZ_HUMAN] Fibulin-1 OS=Homo sapiens GN=FBLN1 PE=1 SV=4 - [FBLN1_HUMAN] Zinc-alpha-2-glycoprotein OS=Homo sapiens GN=AZGP1 PE=1 SV=2 - [ZA2G_HUMAN] Protein S100-A4 OS=Homo sapiens GN=S100A4 PE=1 SV=1 - [S10A4_HUMAN] Hepatocyte growth factor-like protein OS=Homo sapiens GN=MST1 PE=1 SV=2 - [HGFL_HUMAN] Serum paraoxonase/arylesterase 1 OS=Homo sapiens GN=PON1 PE=1 SV=3 - [PON1_HUMAN] Properdin OS=Homo sapiens GN=CFP PE=1 SV=2 - [PROP_HUMAN] Flavin reductase (NADPH) OS=Homo sapiens GN=BLVRB PE=1 SV=3 - [BLVRB_HUMAN] Keratin, type I cytoskeletal 9 OS=Homo sapiens GN=KRT9 PE=1 SV=3 - [K1C9_HUMAN] Pigment epithelium-derived factor OS=Homo sapiens GN=SERPINF1 PE=1 SV=4 - [PEDF_HUMAN] Complement factor H-related protein 2 OS=Homo sapiens GN=CFHR2 PE=1 SV=1 - [FHR2_HUMAN] Afamin OS=Homo sapiens GN=AFM PE=1 SV=1 - [AFAM_HUMAN] Mannan-binding lectin serine protease 1 OS=Homo sapiens GN=MASP1 PE=1 SV=3 - [MASP1_HUMAN] Lumican OS=Homo sapiens GN=LUM PE=1 SV=2 - [LUM_HUMAN] Cysteine-rich secretory protein 3 OS=Homo sapiens GN=CRISP3 PE=1 SV=1 - [CRIS3_HUMAN] 167 Here, MW = Molecular Weight; vs. = fold changes; Bold Numbers = Decreased (<2 folds); Black color numbers =Unhanged; and Highlighted Numbers = Increased (>2 folds). Chapter - VII Appendices 14.54 5.05 11.36 27.73 15.99 92.28 11.28 Postop vs. Preop 0.66 0.34 0.57 0.48 0.55 0.43 1.19 WSB vs. Preop 0.11 5.59 6.03 6.53 10.18 0.66 2.63 TSB vs. Preop 0.09 4.10 3.92 4.03 8.82 0.42 0.87 TSB vs. WSB 0.82 0.72 0.65 0.63 0.85 0.65 0.33 Preop 5hr vs. 0 hr 0.49 0.68 0.69 0.69 0.53 0.53 9.19 P98160 468.53 0.93 1.13 1.25 1.11 0.93 Q03591 Q04756 Q06033 Q14476 Q14520 Q15848 Q16519 Q16610 Q1L857 Q53H26 Q59GX5 Q59HB3 Q5I6Y5 Q5JU74 Q5QTQ6 Q5SW02 Q5T123 Q5T619 Q5T985 37.63 70.64 99.79 11.03 62.63 26.40 72.42 60.64 115.40 77.03 55.68 183.46 55.01 11.36 24.64 120.54 9.37 62.30 105.15 0.41 0.55 1.51 0.77 0.59 0.72 0.46 0.57 0.77 0.09 0.81 0.53 0.73 0.72 0.72 0.56 0.50 0.37 0.53 0.50 0.62 0.70 3.42 0.62 0.72 0.50 0.53 0.61 0.15 1.16 0.50 8.48 0.64 0.64 0.65 4.85 6.83 0.65 0.30 0.49 0.59 3.01 0.42 0.57 0.44 0.39 0.43 0.14 0.86 0.38 5.38 0.47 0.52 0.60 4.11 6.76 0.51 0.60 0.82 0.77 0.88 0.69 0.80 0.83 0.71 0.70 0.93 0.74 0.75 0.61 0.75 0.80 0.92 0.85 0.99 0.79 0.44 0.68 0.68 0.46 0.28 0.67 0.35 0.63 0.78 0.04 0.68 0.49 0.69 0.71 0.72 0.64 0.75 0.47 0.66 Q5UGI6 37.26 0.97 0.53 0.39 0.76 0.64 Q5VY30 22.93 0.48 0.61 0.48 0.76 0.59 Accession MW [kDa] P55056 P62328 P62805 P63104 P68871 P80108 P81605 Description Apolipoprotein C-IV OS=Homo sapiens GN=APOC4 PE=1 SV=1 - [APOC4_HUMAN] Thymosin beta-4 OS=Homo sapiens GN=TMSB4X PE=1 SV=2 - [TYB4_HUMAN] Histone H4 OS=Homo sapiens GN=HIST1H4A PE=1 SV=2 - [H4_HUMAN] 14-3-3 protein zeta/delta OS=Homo sapiens GN=YWHAZ PE=1 SV=1 - [1433Z_HUMAN] Hemoglobin subunit beta OS=Homo sapiens GN=HBB PE=1 SV=2 - [HBB_HUMAN] Phosphatidylinositol-glycan-specific phospholipase D OS=Homo sapiens GN=GPLD1 PE=1 SV=3 - [PHLD_HUMAN] Dermcidin OS=Homo sapiens GN=DCD PE=1 SV=2 - [DCD_HUMAN] Basement membrane-specific heparan sulfate proteoglycan core protein OS=Homo sapiens GN=HSPG2 PE=1 SV=4 [PGBM_HUMAN] Complement factor H-related protein 1 OS=Homo sapiens GN=CFHR1 PE=1 SV=2 - [FHR1_HUMAN] Hepatocyte growth factor activator OS=Homo sapiens GN=HGFAC PE=1 SV=1 - [HGFA_HUMAN] Inter-alpha-trypsin inhibitor heavy chain H3 OS=Homo sapiens GN=ITIH3 PE=1 SV=2 - [ITIH3_HUMAN] G-gamma-hemoglobin gene from Greek HPFH mutant, . (Fragment) OS=Homo sapiens PE=2 SV=1 - [Q14476_HUMAN] Hyaluronan-binding protein 2 OS=Homo sapiens GN=HABP2 PE=1 SV=1 - [HABP2_HUMAN] Adiponectin OS=Homo sapiens GN=ADIPOQ PE=1 SV=1 - [ADIPO_HUMAN] Protein S (Fragment) OS=Homo sapiens GN=PROS1 PE=2 SV=1 - [Q16519_HUMAN] Extracellular matrix protein 1 OS=Homo sapiens GN=ECM1 PE=1 SV=2 - [ECM1_HUMAN] Ceruloplasmin (Fragment) OS=Homo sapiens PE=2 SV=1 - [Q1L857_HUMAN] Transferrin variant (Fragment) OS=Homo sapiens PE=2 SV=1 - [Q53H26_HUMAN] L-plastin variant (Fragment) OS=Homo sapiens PE=2 SV=1 - [Q59GX5_HUMAN] Apolipoprotein B variant (Fragment) OS=Homo sapiens PE=2 SV=1 - [Q59HB3_HUMAN] Lamin A/C transcript variant 1 OS=Homo sapiens GN=LMNA PE=2 SV=1 - [Q5I6Y5_HUMAN] Putative uncharacterized protein DKFZp761J1810 OS=Homo sapiens GN=DKFZp761J1810 PE=4 SV=1 - [Q5JU74_HUMAN] MSTP010 OS=Homo sapiens PE=2 SV=1 - [Q5QTQ6_HUMAN] Zinc finger MYM-type protein 1 OS=Homo sapiens GN=ZMYM1 PE=2 SV=1 - [Q5SW02_HUMAN] SH3 domain binding glutamic acid-rich protein like 3 OS=Homo sapiens GN=SH3BGRL3 PE=2 SV=1 - [Q5T123_HUMAN] Zinc finger protein 648 OS=Homo sapiens GN=ZNF648 PE=1 SV=1 - [ZN648_HUMAN] Inter-alpha (Globulin) inhibitor H2 OS=Homo sapiens GN=ITIH2 PE=2 SV=1 - [Q5T985_HUMAN] Serine/cysteine proteinase inhibitor clade G member 1 splice variant 2 (Fragment) OS=Homo sapiens GN=SERPING1 PE=2 SV=1 - [Q5UGI6_HUMAN] Plasma retinol-binding protein(1-182) OS=Homo sapiens GN=RBP4 PE=2 SV=1 - [Q5VY30_HUMAN] Here, MW = Molecular Weight; vs. = fold changes; Bold Numbers = Decreased (<2 folds); Black color numbers =Unhanged; and Highlighted Numbers = Increased (>2 folds). 168 Chapter - VII Appendices 83.95 71.67 24.41 35.86 7.16 33.07 Postop vs. Preop 0.56 0.65 0.60 0.77 0.60 0.41 WSB vs. Preop 0.54 0.87 0.63 0.48 0.62 5.23 TSB vs. Preop 0.37 0.68 0.46 0.30 0.39 4.58 TSB vs. WSB 0.67 0.79 0.70 0.61 0.63 0.88 Preop 5hr vs. 0 hr 0.62 0.70 0.63 0.64 0.61 0.11 Q6UXM4 31.66 0.76 0.68 0.54 0.80 1.02 Q71V99 Q7Z7Q0 Q8IZZ5 Q8TCF0 Q8TD12 Q8WY91 Q92954 Q96IY4 Q96L50 Q9BRL5 Q9H2L9 Q9H552 Q9H8A8 Q9NZP8 Q9UGM5 Q9Y5Y7 Q9Y6R7 17.96 92.28 67.69 52.90 29.35 62.85 150.98 48.39 46.69 16.50 38.02 55.12 25.94 53.46 42.03 35.19 571.64 0.44 0.68 0.54 2.03 0.57 0.45 0.74 0.64 0.55 0.56 0.54 0.64 0.39 0.93 0.48 0.62 0.84 4.37 0.50 0.56 0.77 0.72 0.37 0.73 0.52 0.62 3.79 0.68 0.56 4.24 0.60 0.68 0.66 0.70 2.85 0.30 0.39 0.63 0.44 0.20 0.53 0.37 0.37 2.78 0.53 0.43 3.25 0.48 0.51 0.57 0.51 0.65 0.59 0.74 0.81 0.64 0.52 0.73 0.72 0.60 0.72 0.78 0.76 0.80 0.79 0.79 0.87 0.75 0.66 0.63 0.58 0.49 0.83 0.49 0.67 0.64 0.64 0.75 0.59 0.66 0.89 0.63 0.62 0.61 0.69 Accession MW [kDa] Q68BL8 Q6EMK4 Q6FHW3 Q6LAM1 Q6LDG4 Q6NXN2 Description Olfactomedin-like protein 2B OS=Homo sapiens GN=OLFML2B PE=2 SV=2 - [OLM2B_HUMAN] Vasorin OS=Homo sapiens GN=VASN PE=1 SV=1 - [VASN_HUMAN] DF protein OS=Homo sapiens GN=DF PE=2 SV=1 - [Q6FHW3_HUMAN] Heavy chain of factor I (Fragment) OS=Homo sapiens PE=2 SV=1 - [Q6LAM1_HUMAN] Complement protein (Fragment) OS=Homo sapiens GN=C2 PE=4 SV=1 - [Q6LDG4_HUMAN] Hypothetical LOC441242 OS=Homo sapiens GN=LOC441242 PE=2 SV=1 - [Q6NXN2_HUMAN] Ficolin (Collagen/fibrinogen domain containing) 3 (Hakata antigen) OS=Homo sapiens GN=FCN3 PE=2 SV=1 [Q6UXM4_HUMAN] Peptidyl-prolyl cis-trans isomerase OS=Homo sapiens PE=2 SV=1 - [Q71V99_HUMAN] APOB protein OS=Homo sapiens GN=APOB PE=2 SV=1 - [Q7Z7Q0_HUMAN] Coagulation factor XII-Mie OS=Homo sapiens PE=2 SV=1 - [Q8IZZ5_HUMAN] LBP protein OS=Homo sapiens GN=LBP PE=2 SV=1 - [Q8TCF0_HUMAN] Decay-accelerating factor 3 (Fragment) OS=Homo sapiens PE=2 SV=1 - [Q8TD12_HUMAN] THAP domain-containing protein 4 OS=Homo sapiens GN=THAP4 PE=1 SV=2 - [THAP4_HUMAN] Proteoglycan 4 OS=Homo sapiens GN=PRG4 PE=1 SV=2 - [PRG4_HUMAN] Carboxypeptidase B2 OS=Homo sapiens GN=CPB2 PE=1 SV=2 - [CBPB2_HUMAN] Leucine-rich repeat protein 1 OS=Homo sapiens GN=LRR1 PE=1 SV=2 - [LLR1_HUMAN] CALM3 protein OS=Homo sapiens PE=2 SV=1 - [Q9BRL5_HUMAN] AD034 OS=Homo sapiens PE=2 SV=1 - [Q9H2L9_HUMAN] Keratin 8 pseudogene 11 OS=Homo sapiens GN=KRT8P11 PE=2 SV=1 - [Q9H552_HUMAN] Selenium binding protein 1, isoform CRA_b OS=Homo sapiens GN=SELENBP1 PE=2 SV=1 - [Q9H8A8_HUMAN] Complement C1r subcomponent-like protein OS=Homo sapiens GN=C1RL PE=1 SV=2 - [C1RL_HUMAN] Fetuin-B OS=Homo sapiens GN=FETUB PE=1 SV=2 - [FETUB_HUMAN] Lymphatic vessel endothelial hyaluronic acid receptor 1 OS=Homo sapiens GN=LYVE1 PE=1 SV=2 - [LYVE1_HUMAN] IgGFc-binding protein OS=Homo sapiens GN=FCGBP PE=1 SV=3 - [FCGBP_HUMAN] Here, MW = Molecular Weight; vs. = fold changes; Bold Numbers = Decreased (<2 folds); Black color numbers =Unhanged; and Highlighted Numbers = Increased (>2 folds). 169 Chapter - VII Appendices APPENDIX – X : PATIENTS’ CONSENT FORM Study Number: 1986 Patient Identification Number for this trial: CONSENT FORM Investigations into Immunostimulatory Properties of Anticoagulated Salvaged Blood Retrieved from Patients Undergoing Total Knee Arthroplasty Researcher: Prof Benjamin Bradley Please initial box 1. I confirm that I have read and understand the information sheet dated 2/03/2010 (version 1.1) for the above study. I have had the opportunity to consider the information, ask questions and have had these answered satisfactorily. 2. I understand that my participation is voluntary and that I am free to withdraw at any time, without giving any reason, without my medical care or legal rights being affected. 3. I understand that relevant sections of any of my medical notes and data collected during the study may be looked at by responsible individuals from regulatory authorities or from North Bristol NHS Trust, where it is relevant to my taking part in this research. I give permission for these individuals to have access to my records. 4. I agree to take part in the above study. ____________________ Name of Patient Signature _____________________ Name of Person taking consent Signature (If different from researcher) _____________________ Researcher __________ _______________ Date __________ _______________ Date __________ _______________ Date Signature When completed, 1 for patient; 1 for researcher site file; 1 (original) to be kept in medical notes Version 1.0 7/10/2009 170 Chapter - VII Appendices Patient Information Sheet Investigations into Immune Stimulating Effects of the Patients own Salvaged Blood during Total Knee Replacement You are being invited to take part in a research study. Before you decide it is important for you to understand why the research is being done and what it will involve. Please take time to read the following information carefully. Talk to others about the study if you wish. Part 1 tells you the purpose of this study and what will happen to you if you take part. Part 2 gives you more detailed information about the conduct of the study. Ask us if there is anything that is not clear or if you would like more information. Take time to decide whether or not you wish to take part. Part 1 What is the purpose of the study? Total knee replacement has been shown to be associated with immunosuppression postoperatively (reduced activity of the immune system whereby your body is less able to fight infection). Hospital infections are increasingly due to bacteria that are not susceptible to commonly used antibiotics. After your knee replacement, it is generally routine practice for you to be given your own blood back using a specially designed blood salvage drainage system rather than blood from a blood bank. We have established that one particular type of blood salvage system (the system that collects your own blood after the operation and allows us to give this back to you) is associated with improved immunity to levels better than that before the operation. We hope to identify what it is in the salvaged blood that is causing this effect and to see if we can reproduce this effect. Why have I been chosen? You are due to undergo a total knee replacement under the care of one of the surgeons participating in the study. You are also an appropriate patient for the study and for the use of the drainage system in question due to your medical history and type of operation. Do I have to take part? No. It is up to you to decide whether or not to take part. If you do, you will be given this information sheet to keep and be asked to sign a consent form. You are still free to withdraw at any time and without giving a reason. A decision to withdraw at any time, or a decision not to take part, will not affect the standard of care you receive. Version 1.1 02/03/2010 171 Chapter - VII Appendices What will happen to me if I take part? You will have a blood sample taken prior to your operation, which will be used to test your immunity preoperatively. At the end of your operation we will use a blood salvage system to collect any blood draining from the site of the operation. This blood salvage system is used routinely after your operation as part of your normal care. On two occasions during the collection period, a small sample of the blood in the system will be collected. On one occasion after any retransfusion has taken place, prior to you leaving hospital, we will collect another blood sample from you. Other than the samples described above, your operation and follow up will proceed exactly as it would have done if you had not taken part in the study. What do I have to do? Other than reading this form and providing consent if you do wish to take part, the only thing that will happen to you during the course of the study is the collection of the extra blood described above. You will not be required to do anything else that would not normally be part of the operation. What is the product that is being tested? The drainage system that is being used in this study is widely used across Europe and has been used successfully in the Avon Orthopaedic Centre for a number of years. What are the side effects of any treatment received when taking part? There are no additional side effects due to your participation in the study. What are the other possible disadvantages and risks of taking part? No other risks or disadvantages should result from your participation. What are the possible benefits of taking part? We cannot promise the study will help you but the information we get might help improve the treatment of people having a joint replacement in the future. What happens when the research study stops? The follow up after the samples has been analysed will be exactly the same as for other patients having a knee replacement. 172 Chapter - VII Appendices What if there is a problem? Any complaint about the way you have been dealt with during the study or any possible harm you might suffer will be addressed. The detailed information on this is given in Part 2. Version 1.1 Will my taking part in the study be 02/03/2010 kept confidential? Yes. All the information about your participation in this study will be kept confidential. The details are included in Part 2. Contact details Mr Michael Whitehouse Clinical Research Fellow Bristol Implant Research Centre Lower Level Avon Orthopaedic Centre Southmead Hospital Westbury-on-Trym Bristol BS9 3EJ Tel: 0117 9505905 This completes Part 1 of the Information Sheet. If the information in Part 1 has interested you and you are considering participation, please continue to read the additional information in Part 2 before making any decision. 173 Chapter - VII Appendices APPENDIX - XI : FUNDING BODIES Award Name Provider Usage of Funding 1 EMBARK Award (RS/2011/223) Irish Research Council Scholarship for my monthly stipend, consumables and travel expenses 2 Healthcare Innovation Partnership Award (HIPA) (SFI09/SRC/B1794) Science Foundation Ireland Consumables and travel expenses 3 TSR Strand-1 Award (TSR/2008/TL13) Institute of Technology Ireland Scholarship for my monthly stipend, consumables and travel expenses 4 North Bristol Orthopaedic Trust NHS, United Kingdom Consumables required in Southmead Hospital 5 (SFI PI 06/1N.1/B652) Science Foundation Ireland Consumables and Publications 6 (SFI07/SK/B1233b) Science Foundation Ireland Consumables 7 Glycoscience Research Group NUI Galway Lectin array experiments 174 Chapter - VII Appendices APPENDIX - XII: PUBLICATIONS, PRESENTATIONS and ACHIEVEMENTS Peer Reviewed Publications: 1. Islam N, Whitehouse M, Mehandale S, Hall M, Tierney J, O’Connell E, Blom A, Bannister G, Ceredig R, Bradley B. 2014. Post-traumatic Immunosuppression is Reversed by Anticoagulated Salvaged Blood Transfusion; Deductions from studies of Immune Status after Knee Arthroplasty. Clinical and Experimental Immunology. (In Press) Published Abstracts: 1. Islam N, Whitehouse M, Mehandale S, Hall M, Blom A, Bannister G, Ceredig R, Bradley B. 2012. Surgery induced Immunosuppression Syndrome and its reversion by salvaged blood transfusion. Transfusion Alternatives in Transfusion Medicine. 2 (2) 2. Islam N, Whitehouse M, Mehandale S, Hall M, Blom A, Bannister G, Ceredig R, Bradley B. 2011. Neopterin Levels Confirm Immunostimulation by Unwashed Salvaged Blood Transfusion. Transfusion Alternatives in Transfusion Medicine. 2 (1): 28-29. Manuscripts in Preparation: 1. Islam N, Whitehouse M, Mehandale S, Hall M, Blom A, Bannister G, Ceredig R, Bradley B. Does Sterile Trauma Suppress Autoimmunity via the Siglec-10-CD24 Pathway? 2. Islam N, Whitehouse M, Mehandale S, Hall M, Blom A, Bannister G, Ceredig R, Bradley B. Post-traumatic elevations in anti-microbial proteins; Deductions from studies of Immune Status after Knee Arthroplasty. Oral Communications: 1. Using Flow Cytometry to investigate Post-Traumatic Immunosuppression. Irish Cytometry Society Annual Meeting, February 25, 2014, Astra Hall, UCD, Dublin. 2. Novel observations to characterize immunosuppression after major surgical trauma. Postgraduate Research Day, School of Medicine, NUI Galway, Ireland. May 27, 2013 (Best Oral) 3. Systemic and peripheral immunomodulation induced by surgical trauma: novel observations in knee arthroplasty patients. Roche-NCBES Research Award in Life Sciences and Bioengineering, Nov 19, 2012, Galway, Ireland 4. Establishment of human whole blood assays (HWBA) as a screening model for immunomodulatory properties by natural immunomodulators. Shannon ABC Open Innovation Conference, April 4-5, 2012, Limerick, Ireland 175 Chapter - VII Appendices 5. Neopterin Levels Confirm Immunostimulation by Unwashed Salvaged Blood Transfusion. 12th NATA Conference, April 7-8, 2011, Dublin, Ireland (Best Poster) 6. Serum adiponectin and resistin in subjects with impaired Glucose Regulation. 13th Diabetes and Endocrine Conference, 1st-4th March, 2007, Dhaka, Bangladesh Poster Presentations: 1. Post-traumatic Immunosuppression and its Reversal. 15th International Congress of Immunology, Aug 22-27, 2013, Milan, Italy 2. Flow cytometric analysis of changes in cytokine profile of stored human blood samples. Irish Cytometry Society Annual Meeting, Nov 6-7, 2012, Galway 3. Investigation of the immuno-stimulatory properties of re-transfused autologous blood. 2nd Annual Meeting of Irish society of Immunology, Sep 20-21, 2012, Dublin. 4. Characterization of post-traumatic immunosuppression syndrome and it’s response to salvaged blood transfusion. Annual Meeting of Irish society of Immunology, Sep 1-2, 2011, Galway. 5. Surgery induced Immunosuppression Syndrome and its reversion by salvaged blood transfusion. 13th Annual NATA Symposium April 7-8, 2011, Copenhagen, Denmark. 6. Post-traumatic immunosuppression syndrome and it’s reversal by salvaged blood transfusion. British Society of Immunology (BSI) Congress, Dec 5-8, 2011, Liverpool, UK. 7. Neopterin Levels Confirm Immunostimulation by Salvaged Blood Transfusion. 12th Annual NATA Symposium, April 7-8, 2011, Dublin, Ireland (Best Poster) Awards and Achievements: 1. Irish Research Council Award (EMBARK) for doctoral research, 2011. 2. Best Oral Award in Postgraduate Research Day, 2013, College of Medicine, Nursing and Health Sciences, NUI Galway 3. Best Poster Award in 12th Annual NATA Symposium, 2011 4. Obtained certificates in “Laboratory Animal Science and Technique” from The Royal College of Veterinary Surgeons, Ireland; and “Animals (Scientific Procedures) Act 1986” from Home Office, United Kingdom. 176 Chapter - VII Appendices APPENDIX-XIII : ADDITIONAL RESEARCH PROJECTS 1. Feasibility of Automated Whole Blood Screening to Evaluate Novel Immunomodulators Extracted from Natural Bye-Produce. I had carried out a Science Foundation Ireland Healthcare Innovation Programme jointly with Johnson and Johnson Inc in parallel with my PhD research. Summary: Immunity involves a network of different cells that collectively protect the body from microbial infections and cancer. However, when disordered through disease it can cause rheumatoid arthritis, diabetes, allergy, and psoriasis, for which we need new drugs. Nature provides a huge diversity of unique molecules from which many drugs have been discovered. Consequently hundreds of naturalproduct extracts previously tested at Shannon ABC and shown to influence macrophages - cells which control immunity and are at the root of these disorders. This project was undertaken to confirm the potential value of these extracts as new drugs by testing them on human blood cells. The main aim of this project was to develop a human whole blood assay (HWBA) to evaluate immuno-modulatory ingredients extracted from natural biomass derived from plant, microbial or animal by-produce obtained from industrial, clinical or natural sources. I studied the effect of yeast cell wall extracts (different β-Glucan extracts such as: particulate, hydrolysate, and different fractions such as >100kDa, >3kDa and <3kDa on immunological changes in human whole blood culture. Additionally, I also studied the salvaged blood plasma that is known to be efficacious in patients undergoing joint replacement surgery; albeit without knowledge of which ingredients were responsible. In-vitro changes in the levels of 13 cytokines and chemokines in the HWBA (e.g. were measured following treatment of diluted human whole blood with different βGlucan samples as well as the salvaged plasma and also the positive control LPS for different incubation periods (0, 6, 10, and 24 hours). Comparing with LPS control, I reported productions of different inflammatory Biomarkers when treated with different β-Glucan extracts and the elevations were also time dependent. I optimized HWBA for kinetics, sensitivity and outcome measures with a view to developing a low-cost rapid assay suitable for automated screening using a Biomek FX Workstation. Genetically determined individual variations in cytokine levels (high, intermediate and low producers) influence cytokine profiles of blood donor; however the trend of changes in this cytokine/chemokines following treatments remained constant. 177 Chapter - VII Appendices 2. Investigation of the immune-stimulatory effect of natural polysaccharides on intracellular TNF-α expression by monocytes in a human whole blood culture This project aimed is to screen novel naturally derived sugar compounds that may have potential as future therapeutic immunomodulatory drugs. Summary Post-traumatic immunosuppression is a common consequence of many kinds of trauma (surgery or injury) leading to patients becoming more susceptible to acquired infections. Boosting patients’ immunity therefore would be beneficial in order to prevent them from being immunosuppressed. However, there is still a huge shortage of drugs used to enhance post-traumatic immunity. The role of naturallyderived compounds, have been investigated as potential clinical therapeutic agents. However, the full potential and mode of action of naturally-derived polysaccharides (PS) in modulating different disease and pathological conditions has not been well studied. The aim was to study the immunomodulatory effects of a panel of natural polysaccharides derived from natural sources on two cell based model systems. Six structurally-defined polysaccharides derived from natural sources were selected for this study. Their activities were tested in vitro using either THP-1 monocyte cell line or human whole blood cultures. Levels of pro-inflammatory cytokines (IL-1β, IL-6, and TNF-α), anti-inflammatory cytokines (IL-10 and IL-13), and chemokines (IL-8, MCP-1, and MIP-1α) in the culture supernatants were measured by ELISA. Following a six hour incubation of heparinized blood from healthy controls, flowcytometric analysis was also used to monitor intracellular TNF-α expression by gated monocytes using Accuri-C6 cytometer. In a whole blood culture system, TNF-α expression increased in monocytes following six-hour incubation with four of the six polysaccharides studied. This would suggest an immunostimulatory role for these four polysaccharides. The two anti-inflammatory cytokines, IL-10 and IL-13, were both undetectable in all the samples (not shown). Increased production of all six pro-inflammatory cytokines and chemokines by the four polysaccharides studied following incubation indicating that these polysaccharides could boost immunity. Therefore, stimulation of TNF-α expression by monocytes, by naturally-derived polysaccharides indicates the potential for these molecules to be used in a clinical setting to prevent immunosuppression. The human whole blood culture is an useful technique to measure the effect of a compound on immunological responses and can be used in clinical diagnosis. Polysaccharides with the immune-enhancing value need further molecular and functional investigations prior to clinical administrations. Poster Presentation: Flowcytometric investigation of the immune-stimulatory effect of polysaccharides on Intracellular TNF-α expression by monocytes in a human whole blood culture. Irish Cytometry Society Annual Meeting, Astra Hall, UCD, Dublin, Ireland. Feb. 25, 2014. Manuscript in preparation 178 Chapter - VII Appendices APPENDIX – XIV : LIST OF REAGENTS Table 7.7: List of Reagents Reagent Supplier Catalogue number Bovine serum albumin Sigma-Aldrich A2153 Bradford reagent Sigma-Aldrich B6916 Bromophenol blue Sigma-Aldrich B8026 Calcium chloride Sigma-Aldrich C8106 Dimethyl sulfoxide Sigma-Aldrich D2650 Dulbecco’s PBS Gibco-Invitrogen 14190 DuoSet ELISA systems R&D Systems Flowcytomix Bead Array Kit e-Bioscience (Bender Medsystems) HMGB-1 ELISA (1) IBL International (developed by Shino Corporation) HMGB-1 ELISA (2) USCN SEA399Hu α-Defensin (1) Hycult Biotech HK317-02 α1-Defensin (2) USCN SEB705Hu S100-A8/A9 Hycult Biotech HK325-02 CD-24 USCN SEB143Hu Siglec-10 USCN SED921Hu Siglec-2 USCN Nunc Maxisorp ELISA Plate Fisher Scientific SEB144Hu NC9229197 Ethanol Sigma-Aldrich E7023 Glycine Sigma-Aldrich G8898 HEPES Sigma-Aldrich H0887 Hydrochloric acid Sigma-Aldrich H1758 Isopropanol Sigma-Aldrich I9516 L-glutamine Gibco-Invitrogen IL-1β (DY201), IL-2 (DY202), IL-6 (DY206), IL-8 (DY208), IL-10 (DY217B), IL-12p70 (DY1270), IL-13 (DY213), IL-17 (DY317), IL-22 (DY782), IL-1RA (DY280), TNF-α (DY210), TGF-β1 (DY240), MCP-1 (DY279), MIP-1α (DY270) sCD14 (DY383), sIL-6R (DY227), sgp130 (DY228), ADAM-17 (DY930), HSP-27 (DYC1580), HSP-60 (DYC1800), HSP70 (DYC1663), Annexin-A2 (DYC3928), C5a (DY2037), KGF (DY251) BMS817FF ST51011 25030-024 179 Chapter - VII Appendices Reagent Supplier Catalogue number Phosphate buffered saline tablets Sigma-Aldrich P4417 Potassium chloride Sigma-Aldrich P3911 Precision Plus Protein Biorad RPMI-1640 Sigma-Aldrich R0833 Sodium azide Sigma-Aldrich A2152 Sodium chloride Sigma-Aldrich S5886 Sodium dodecyl sulfate Sigma-Aldrich L4390 Sodium hydroxide Sigma-Aldrich S5881 Sulfuric acid Sigma-Aldrich 339741 TMB ELISA substrate Millipore ES001 Trizma base Sigma-Aldrich T6066 Tween-20 Sigma-Aldrich P1379 CPT tube Beckton Dickenson 362753 P-100 tube Beckton Dickenson 366456 MARS Cartridge 5188-6560 Spin filters 0.22 μm Agilent Technologies Agilent Technologies Buffer-A Agilent Technologies 5185-5987 Buffer-B Agilent Technologies 5185-5988 Luer-Lock adapters Agilent Technologies 5188-5249 plastic Luer-Lock syringes Agilent Technologies 5188-5250 Teflon Luer- Lock needles Agilent Technologies 5188-5253 Spin concentrator (5 kDa MW) Agilent Technologies 5185-5991 Alexa-Fluor 555 Life Technologies Ficoll-Hypaque GE Healthcare 17-1440-02 Acrylamide 01709 SDS Sigma Aldrich Sigma Aldrich L4390 TEMED Sigma Aldrich T9281 APS Sigma Aldrich A9164 161-0376 Foetal bovine serum (FBS) 5185-5990 A20174 180 Chapter - VII Appendices MEDIA/BUFFER FORMULATIONS Complete culture media (CCM): RPMI-1640 (89%) Fetal bovine serum (FBS) (10%) L-glutamine (1%) Freezing media: RPMI-1640 (69%) FBS (10%) DMSO (20%) L-glutamine (1%) Resolving Gel - (12.5% SDS-PAGE gel) Acrylamide Tris 1.5 M; pH 8.8 SDS (10%) TEMED (1%) APS (10%) Stacking Gel (4%) Acrylamide Tris 0.5 M; pH 6.8 SDS (10%) TEMED (1%) APS (10%) 181 Chapter - VII Appendices APPENDIX – XV: CROSS-REACTIVITY OF MEASURED BIOMARKERS Analyte Product No. Manufacturer IL-1β IL-2 IL-6 IL-12p70 IL-17A TNF-α IFN-γ IL-22 IL-4 IL-5 IL-9 IL-10 IL-13 IL-1RA TGF-β1 BMS817FF BMS817FF BMS817FF BMS817FF BMS817FF BMS817FF BMS817FF BMS817FF BMS817FF BMS817FF BMS817FF BMS817FF BMS817FF DY280 DY240 eBioscience eBioscience eBioscience eBioscience eBioscience eBioscience eBioscience eBioscience eBioscience eBioscience eBioscience eBioscience eBioscience R&D Systems R&D Systems IL-8 MCP-1 MIP-1α HMGB-1 S100-A8/A9 α-Defensin HSP-27 HSP-60 HSP-70 Annexin-A2 sIL-6R sgp-130 ADAM-17 sCD14 Lysozyme CD-24 Siglec-10 Siglec-2 C5a IL-1β IL-6 TNF-α IL-10 DY208 DY279 DY270 SEA399Hu HK325-02 SEB705Hu DYC1580 DYC1800 DYC1663 DYC3928 DY227 DY228 DY930 DY383 E-22013 SEB143Hu SED921Hu SEB144Hu DY2037 DY201 DY206 DY210 DY217B R&D Systems R&D Systems R&D Systems USCN Lifesciences Hycult Biotech USCN Lifesciences R&D Systems R&D Systems R&D Systems R&D Systems R&D Systems R&D Systems R&D Systems R&D Systems Life Technologies USCN Lifesciences USCN Lifesciences USCN Lifesciences R&D Systems R&D Systems R&D Systems R&D Systems R&D Systems IL-13 IL-12p70 IL-17 DY213 DY1270 DY317 R&D Systems R&D Systems R&D Systems KGF DY251 R&D Systems Cross Reactivity None None None None None None None None None None None None None None pTGF-β2 (0.3%); rhTGF-β1.2 (57%); rhTGF-β2 (0.15%); rhTGF-β3 (0.96%); raTGF-β5 (1.8%) None None None None Not tested None HSP-70 (0.23%) None HSP-27 (6.3%) None None None None None None None None None rRat IL-1β (3.8%); rhIL-1β ( (6.3%) None None r canine IL-10 (0.3%); r equine (5.2%); r viral IL-10 (0.6%) None None Recombinant human IL-17A/F heterodimer (21.7%) None 182 CHAPTER – VIII REFERENCES Chapter - VIII References A. 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