A2AAR) Expression
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Safhi, Mohammed Mohsen A. (2008) Priming of STAT1 and STAT3 for cytokine-triggered degradation by the proteasome upon A2Aadenosine receptor (A2AAR) expression. PhD thesis http://theses.gla.ac.uk/310/ Copyright and moral rights for this thesis are retained by the author A copy can be downloaded for personal non-commercial research or study, without prior permission or charge This thesis cannot be reproduced or quoted extensively from without first obtaining permission in writing from the Author The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the Author When referring to this work, full bibliographic details including the author, title, awarding institution and date of the thesis must be given. Glasgow Theses Service http://theses.gla.ac.uk/ [email protected] Priming of STAT1 and STAT3 for Cytokine-triggered Degradation by the Proteasome upon A2AAdenosine Receptor (A 2AAR) Expression Mohammed Mohsen A. Safhi M.Sc. (Hons) A thesis submitted in fulfilment of requirements for the degree of Doctor of Philosophy Faculty of Biomedical and life Sciences University of Glasgow © Mohammed Mohsen A. Safhi, March 2008 i Acknowledgements ii Abbreviations iii Table of Contents viii List of Figures xi List of Table xv Abstract xvi ii ACKNOWLEDGMENTS This thesis could not have been completed without the assistance and guidance from numerous people. I would like to express my appreciation and gratitude to my supervisor, Dr. Tim Palmer for his valuable supervision and useful suggestions given to me throughout my PhD. I would also like to thank Dr. Billy Sands for all the helpful discussion of my work and all the members of the Palmer Lab, past and present, for all their assistance and friendship. I would like to extend my thanks to Ministry of Health in Saudi Arabia for scholarship. I would like also to thank numerous people from the department for their help and encouragement throughout the years. A special thanks to my assessor panel, Professor Graeme Milligan, Dr Rob Strang, Dr Andrew Pitt for their helpful discussions and suggestions. I would also like to thank my Dad, Mum, brothers and sister for the love and support they have given me throughout it all. Finally many thanks to my wife and my children for their support and patience throughout my research. iii Abbreviations A2AAR A2A adenosine receptor ADP Adenosine 5-diphosphateَ AMP Adenosine 5-monophosphateَ APR Acute phase response AR Adenosine receptors ARHI A Ras homologue member I ATP Adenosine triphosphate AVs Adenoviruses BCA Bicinchonic acid salt BMI Body mass index BSA Bovine serum albumin BSF-3 B-cell-stimulating factor-3 CaM Calmodulin cAMP Cyclic AMP CBM Cytokine-binding module C-ERMAD C-terminal ERM-associated domain cGMP Cyclic GMP CIS Cytokine-inducible SH2 protein CNTF Ciliary neurotrophic factor CRP C-reactive protein CT-1 Cardiotrophin-1 CUE Coupling of Ub conjugation to ER degradation Cul4A Cullin 4A DMAM Dulbeco’s modified Eagle’s medium DMSO Dimethyl sulphoxide dNTPs Deoxynucleotide 5-triphosphatesَ DTT Dithiothreitol DUB Deubiquitylating enzyme EBM-2 Endothelial Basal Media-2TM ECL Enhanced chemiluminescence ECM Extracellular matrix ECs Endothelial cells EDTA Ethylenediaminotetra-acetic acid EGF Epidermal growth factor EGTA Ethylene glycol-bis (2-aminoethylether)-N,N,N’,N’-tetracetic acid EPAC Exchange protein activated by cAMP EPO Erythropoietin ERK Extracellular-signal regulated kinase ERM Ezrin-radixin-moesin FERM Four-point-one ezrin radixin moesin iv FBS Foetal bovine serum FBS Phosphate-buffered saline GAGs Glycosaminoglycans G-CSFR Granulocyte colony-stimulating factor receptor GH Growth hormone GM Granulocyte-macrophages Gp 130 Glycoprotein 130 HAEC Human aortic endothelial cells HEPES N-(2-Hydroxyethyl)-piperazine-N’-(2-ethanesulfonic acid) hFGF-B Human fibroblast growth factor-B HRP Horseradish peroxidase IFN Interferon IGF-l Insulin-like growth factor-l Ig Immunoglobulin IgSF Immunoglobulin superfamily IKK IκB kinase IL Interleukin IL-6Rα IL-6 receptor α IPTG Isopropyl-β-D-thiogalactopyranoside IRAK IL-1 receptor-associated kinase JAK Janus kinase JH JAK homology KIR kinase inhibitory region LIF leukaemia inhibitory factor LIF-R leukemia inhibitory factor receptor LPS lipopolysaccharide MAPK Mitogen-activated protein kinase MD-2 Myeloid differentiation protein-2 MEF Mouse embryonic fibroblast MHC Major histocompatibility complex MI Myocardial infarction MTT 3-(4,5-dimethylthiazol-2yl)-2,5-diphenyl 2H-tetrazolium bromide MTX Methotrexate NCA Neutrophil cytoplasmic antibody NCAM Neural cell adhesion molecule NEDD8 Neural precursor cell expressed developmentally down-regulated 8 NF-кB Nuclear factor-кB NK Natural killer NLS Nuclear localisation sequence NNT-1 Neurotrophin-1 NPC Nuclear pore complex NRTK Non-receptor tyrosine kinase OSM Oncostatin M PH Pleckstrin homology v PIAS Protein inhibitor of activated STAT PKA Protein kinase A PlGF Placental growth factor PLR Prolactin PMN Polymorphonuclear PMSF Phenylmethylsulphonyl fluoride PTK Protein tyrosine kinase PTPase Protein tyrosine phosphatase RANTES Regulated upon activation normal T cell expressed presumed secreted ROS Reactive oxygen species RTK Receptor tyrosine kinase SAA Serum amyloid SCID Severe combined immunodeficiency disease SDS Sodium dodecyl sulphate SH2 Src homology2 SHP2 SH2-domain-containing protein tyrosine phosphatase SOCS Suppressor of cytokine signalling STAT Signal transducer and activator of transcription StIP1 STAT3 interacting protein SUMO Small ubiquitin-like modifier TAP Two-step tandem affinity purification TBS Tris-buffered saline TEMED N,N,N’,N’-tetramethylethylenediamine TGF-β Transforming growth factor-β Th1 Type-1 T-helper cells TMB 3,3’5,5’ –tetramethylbenzidine TNF-α Tumour necrosis factor-α TPO Thrombopoietin TRIS Tris(hydromethyl-amino)ethane TSLP Thymic stromal lymphopoietin Ub Ubiquitin UBA Ub-associated domain UBD Ub-binding domain UBL Ub-like domain UBP Ub-specific processing protease UIM Ub-interacting motif VEGF Vascular endothelial growth factor VEGFR2 Vascular endothelial growth factor receptor 2 VIPs V-interaction proteins WT Wild-type vi Pharmacological Names CGS21680 2-p-(2-Carboxyethyl)phenethylamino-5-N-ethylcarboxamidoadenosineَ hydrochloride ZM241385 4-(2-[7-amino-2-{2-furyl}{1,2,4}triazolo{2,3-α}{1,3,5}triazin-5-yl- amino]ethyl)phenol vii Table of Contents Chapter 1 Introduction ............................................................................1 1.1 JAKs in cytokine signalling.........................................................................2 1.2 The Signal transducer and activator of transcription (STAT) family of transcription factors ................................................................................................4 1.3 Regulation of cytokine signalling by suppressor of cytokine signalling (SOCS) family molecules.........................................................................................8 1.3.1 SOCS1....................................................................................................9 1.3.2 SOCS3..................................................................................................10 1.4 Cytokines ....................................................................................................12 1.4.1 IL-6 ......................................................................................................13 1.4.1.1 IL-6 structure .......................................................................................14 1.4.1.2 IL-6 Receptors .....................................................................................14 1.4.1.3 Signalling of IL-6-type cytokines ........................................................17 1.4.2 IFN alpha .............................................................................................18 1.4.2.1 IFN-inducible STAT complexes..........................................................20 1.4.3 Leptin Biology.....................................................................................23 1.4.3.1 Leptin receptor.....................................................................................24 1.5 Adenosine receptors...................................................................................25 1.5.1 A2AAR..................................................................................................26 1.5.1.1 The A 2AAR as anti-inflammatory GPCR.............................................29 1.6 Ubiquitination ............................................................................................33 1.6.1 Ub as an inducible and reversible signal..............................................34 1.6.2 Proteasomal degradation......................................................................35 1.7 E3 ligase and STAT degradation..............................................................36 1.8 Aims and objectives of research ...............................................................38 Chapter 2 Materials and Methods ........................................................41 2.1 Chemicals and Suppliers ...........................................................................42 2.2 Cell Culture & Transfection Methods .....................................................46 2.2.1 Cell maintenance..................................................................................46 2.2.2 Transfection with Fugene ....................................................................47 2.2.3 Infection of HUVECs with AVs..........................................................47