Abstracts tagged "B cells"

Abstract Number: 995 • 2014 ACR/ARHP Annual Meeting
Rheumatoid Arthritis Patients Have Alterations in Inherently Autoreactive 9G4+ B-Cell Subpopulations in Peripheral Blood
Rita A. Moura^1,2, Maria J. Leandro³, Venkat Reddy¹, João E. Fonseca^2,4 and Geraldine Cambridge³, ¹Centre for Rheumatology Research, Division of Medicine, University College London, London, United Kingdom, ²Rheumatology Research Unit, Instituto de Medicina Molecular, Faculdade de Medicina da Universidade de Lisboa, Lisbon, Portugal, ³Centre for Rheumatology, Department of Medicine, University College London, London, United Kingdom, ⁴Rheumatology Department, Centro Hospitalar de Lisboa Norte, EPE, Hospital de Santa Maria, Lisbon, Portugal
Background/Purpose B-cells utilizing the VH-region immunoglobulin gene VH4-34 produce natural autoreactive antibodies. The rat monoclonal antibody 9G4 recognizes B-cells with VH4-34-encoded B-cell receptors (9G4+ B-cells)…
Abstract Number: 2820 • 2014 ACR/ARHP Annual Meeting
Dual Role for B Cells in Promoting Bone Erosion in Rheumatoid Arthritis Via Effects on Osteoclast and Osteoblast Differentiation
Nida Meednu¹, Hengwei Zhang², Teresa Owen³, Lianping Xing⁴ and Jennifer H. Anolik⁵, ¹Allergy, Immunology and Rheumatology, University of Rochester, Rochester, NY, ²Pathology and Laboratory Medicine, University of Rochester, Rochester, NY, ³Rheumatology, University of Rochester, Rochester, NY, ⁴Pathology & Lab Medicine, University of Rochester, Rochester, NY, ⁵Medicine- Allergy, Immunology and Rheumatology, University of Rochester, Rochester, NY
Background/Purpose Rheumatoid arthritis (RA) is a systemic autoimmune disease that often leads to joint damage, a process mediated by an imbalance between bone resorption and…
Abstract Number: 1943 • 2014 ACR/ARHP Annual Meeting
In Vivo Effects of Epratuzumab, a Monoclonal Antibody Targeting Human CD22, on B Cell Function in Human CD22 Knock-in (Huki) Mice
Carolin Brandl*¹, Lamia Özgör*¹, Miriam Wöhner^1,2, Anthony Shock³ and Lars Nitschke¹, ¹Division of Genetics, University of Erlangen, Erlangen, Germany, ²Research Institute of Molecular Pathology, Vienna, Austria, ³UCB Pharma, Slough, United Kingdom
Background/Purpose Epratuzumab is a humanized monoclonal antibody that targets the B cell-specific protein CD22 currently in Phase 3 clinical trials in patients (pts) with systemic…
Abstract Number: 994 • 2014 ACR/ARHP Annual Meeting
IL-7 Modulates B Cell Immunoglobulin Isotype Production and Increases B Cell Activating Factor of the Tumor Necrosis Factor Family (BAFF) in Synovial Fibroblasts from Osteoarthritis (OA) and Rheumatoid Arthritis (RA) Patients
Georg Pongratz¹, Stephan Kuhn², Madlen Melzer², Torsten Lowin² and Rainer Straub³, ¹Internal Medicine I, University Hospital Regensburg, Regensburg, Germany, ²University Hospital Regensburg, Regensburg, Germany, ³Internal Medicine, University Hospital Regensburg, Regensburg, Germany
Background/Purpose Interleukin(IL)-7 is increased in synovial fluid from rheumatoid arthritis (RA) patients as compared to osteoarthritis (OA) patients and has been attributed a proinflammatory role,…
Abstract Number: 2806 • 2014 ACR/ARHP Annual Meeting
Characteristic Phenotype of Peripheral Blood Lymphocytes in Patients with IgG4-Related Disease, Comparing to Primary Sjögren Syndrome and Healthy Controls
Shintaro Hirata, Shingo Nakayamada, Satoshi Kubo, Maiko Yoshikawa, Naoki Yunoue, Kazuhisa Nakano, Kunihiro Yamaoka, Kazuyoshi Saito and Yoshiya Tanaka, The First Department of Internal Medicine, University of Occupational and Environmental Health, Japan, Kitakyushu, Japan
Background/Purpose : IgG4-related disease (IgG4-RD) is a systemic disease that is characterized by the infiltration of IgG4-positive plasma cells and T cells into various organs.…
Abstract Number: 1942 • 2014 ACR/ARHP Annual Meeting
Regulation of the Responses of Human B Cell Subsets to Innate Immune Signals By Epratuzumab, a Humanized Monoclonal Antibody Targeting CD22
Natalia V. Giltiay¹, Geraldine L. Shu², Anthony Shock³ and Edward A. Clark⁴, ¹Department of Immunology, Division of Rheumatology, University of Washington, Seattle, WA, ²Department of Immunology, University of Washington, Seattle, WA, ³UCB Pharma, Slough, United Kingdom, ⁴Department of Immunology and Division of Rheumatology, University of Washington, Seattle, WA
Background/Purpose The B cell-associated receptor, CD22, functions to regulate adhesion and signaling through both the B cell receptor (BCR) and Toll-like receptors (TLRs) expressed in…
Abstract Number: 992 • 2014 ACR/ARHP Annual Meeting
Differential Antigen-Presenting B-Cell Phenotype from Synovial Microenvironment of Rheumatoid Arthritis and Psoriatic Arthritis Patients
Estefania Armas-Gonzalez¹, Ana Diaz-Martin¹, María Jesús Dominguez-Luis², Maria Teresa Arce-Franco¹, Ada Herrera-Garcia¹, Vanesa Hernandez¹, Alicia Usategui³, Jose L. Pablos⁴, Juan D. Cañete⁵, Sagrario Bustabad¹ and Federico Díaz-González¹, ¹Hospital Universitario de Canarias, La Laguna. Tenerife, Spain, ²Center of Biomedical Research of the Canary Islands, University of La Laguna, Tenerife, Spain, ³Servicio de Reumatología, Instituto de Investigación Hospital 12 de Octubre (i+12), Madrid, Spain, ⁴Servicio de Reumatología, Instituto de Investigación Hospital 12 de Octubre (I+12), Madrid, Spain, ⁵Arthritis Unit. Rheumatology Department, Hospital Clínic of Barcelona, Barcelona, Spain
Background/Purpose The systemic depletion of B cells induced by mabthera, a monoclonal antibody against human CD20, has shown to be an effective therapy for controlling…
Abstract Number: 2696 • 2014 ACR/ARHP Annual Meeting
Relationship Between Soluble sCD23 and B Cell Activation Factor in Patients with Systemic Lupus Erythematosus before and after Rituximab
Laura Heretiu^1,2, Maria J. Leandro³, Venkat Reddy⁴, David A. Isenberg⁵ and Geraldine Cambridge³, ¹Medicine, Centre for Rheumatology, University College London, London, United Kingdom, ²Rheumatology and Internal Medicine, 'Sf. Maria' Clinical Hospital, Bucharest, Romania, ³Centre for Rheumatology, Department of Medicine, University College London, London, United Kingdom, ⁴Centre for Rheumatology Research, Division of Medicine, University College London, London, United Kingdom, ⁵Centre for Rheumatology Research, Rayne Building, 4th Floor, Centre for Rheumatology, Department of Medicine, University College London, London, United Kingdom
Background/Purpose CD23 is the low-affinity receptor for IgE (FceRII). The soluble form, sCD23 is released into the circulation and in vitro this is consistent with…
Abstract Number: 1941 • 2014 ACR/ARHP Annual Meeting
Neuropsychiatric Lupus Is Substantially Unaffected By B-Cell Deficiency
Jing Wen¹, Ariel Stock², Haowei Wang³, Mark Shlomchik³, Maria Gulinello² and Chaim Putterman⁴, ¹Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY, ²Albert Einstein College of Medicine, Bronx, NY, ³University of Pittsburgh School of Medicine, Pittsburgh, PA, ⁴The Division of Rheumatology, Albert Einstein College of Medicine, Bronx, NY
Background/Purpose: Neuropsychiatric lupus (NPSLE) is one of the earliest clinical manifestations in human lupus. However, its mechanisms are not fully understood. In lupus, a compromised…
Abstract Number: 991 • 2014 ACR/ARHP Annual Meeting
The Alternative CD20 Transcript Variant Is Not a Factor for Resistance to Rituximab in Patients with Rheumatoid Arthritis
Cecile Gamonet¹, Marina Deschamps², Sandrine Marion³, Philippe Saas⁴, Gilles Chioccha³, Christophe Ferrand⁴ and Eric Toussirot^5,6, ¹INSERM UMR1098, Etablissement Français du Sang / Université de Franche Comté, Besançon, France, ²INSERM UMR1098 / Etablissement Français du Sang/ Université de Franche Comté, Besançon, France, ³Chronic Inflammation and Immune System Labex Inflamex, Université Versailles Saint Quentin, Montigny le Bretonneux, France, ⁴Etablisement Français du Sang ; Université de Franche Comté, INSERM UMR1098, Besançon, France, ⁵Clinical Investigation Centre Biotheraoy CIC 1431, Rheumatology Department, Univesity Hospital, besancon, France, ⁶Rheumatology, University hospital, Besançon, France
Background/Purpose: the identification of predictive factors for the response, or alternatively factors for resistance to biological agents is a relevant goal in the management of…
Abstract Number: 2695 • 2014 ACR/ARHP Annual Meeting
Alterations in B Cell Subsets and BAFF Levels in Autoimmune Rheumatic Diseases Treated with B Cell Depletion Therapy: Rituximab
Pamela M.K Lutalo¹, David P. D'Cruz² and Jo Spencer³, ¹Peter Gorer Department of Immunobiology, King's College London School of Medicine, London, United Kingdom, ²Louise Coote Lupus Unit, Guy's and St Thomas' Hospital NHS Foundation Trust, London, United Kingdom, ³Peter Gorer Department of Immunobiology, King's College London, School of Medicine, London, United Kingdom
Background/Purpose: Systemic lupus erythematosus (SLE) and granulomatosis with polyangiitis (GPA) are autoimmune diseases which develop secondary to immune self-tolerance failure. Both diseases are characterised in…
Abstract Number: 1940 • 2014 ACR/ARHP Annual Meeting
A Novel Murine Model of B Cell-Mediated Glomerular Injury Is Mediated By Cytokines
Alfred Kim¹, Shreeram Akilesh², Ania Koziell³, Sanjay Jain⁴, Jeffrey Hodgin⁵, Mark Miller⁶, Jeffrey Miner⁴ and Andrey Shaw⁷, ¹IM/Div of Rheumatology, Washington Univ School of Med, St. Louis, MO, ²Pathology & Immunolog, Washington University School of Medicine, Saint Louis, MO, ³Experimental Immunobiology, King's College, London, United Kingdom, ⁴Renal Division, Washington University School of Medicine, Saint Louis, MO, ⁵Nephrology, University of Michigan, Ann Arbor, MI, ⁶Infectious Diseases, Washington University School of Medicine, Saint Louis, MO, ⁷Pathology & Immunology/HHMI, Washington University School of Medicine, Saint Louis, MO
Background/Purpose Lupus nephritis (LN) remains the leading cause of mortality for SLE patients, and is associated with proteinuria and foot process effacement. Podocyte foot process effacement…
Abstract Number: 860 • 2014 ACR/ARHP Annual Meeting
Inhibition of G Protein βγ Signaling Inhibits Nephritis in Lupus Prone Mice
Teresa Owen¹, Javier Rangel-Moreno², Jesi To³, Bruce Goldman⁴, Alan Smrcka³ and Jennifer H. Anolik⁵, ¹Rheumatology, University of Rochester, Rochester, NY, ²Medicine- Allergy, Immunology, and Rheumatology, University of Rochester, Rochester, NY, ³Pharmacology & Physiology, University of Rochester, Rochester, NY, ⁴Pathology, University of Rochester, Rochester, NY, ⁵Medicine- Allergy, Immunology and Rheumatology, University of Rochester, Rochester, NY
Background/Purpose G protein-coupled receptors (GPCRs), including chemokine receptors on leukocytes, signal through G protein Gβγ subunits. An important target of Gβγ is phosphoinositide 3 kinase γ…
Abstract Number: 2693 • 2014 ACR/ARHP Annual Meeting
Hyporesponsiveness to TLR9 in Term of Cytokines Production By B Cells in SLE-Patients
Julia Sieber¹, Capucine Daridon¹, Sarah J. Fleischer¹, Vanessa Fleischer¹, Falk Hiepe¹, Tobias Alexander², Guido Heine³, Gerd Burmester⁴, Simon Fillatreau⁵ and Thomas Dörner¹, ¹Charité University Medicine, Dept. Medicine/Rheumatology and Clinical Immunology/German Rheumatism Research Center (DRFZ), Berlin, Germany, ²Dept. Medicine/Rheumatology and Clinical Immunology, Charité University Medicine, Dept. Medicine/Rheumatology and Clinical Immunology/German Rheumatism Research Center (DRFZ), Berlin, Germany, ³Charité University Medicine, Dept. Dermatology, Venerology and Allergology, Berlin, Germany, ⁴Charité University Medicine, Dept. Medicine/Rheumatology and Clinical Immunology, Berlin, Germany, ⁵German Rheumatism Research Center (DRFZ), Berlin, Germany
Background/Purpose The role of B cells in immunity has been mainly related to the generation of antibodies and formation of immune complexes. However, B cells…
Abstract Number: 1938 • 2014 ACR/ARHP Annual Meeting
Effects of Mesenchymal Stem Cells on Human B Cell Proliferation
Erin Collins¹, Maosong Qi² and Gary S. Gilkeson³, ¹Medicine/Rheumatology, Medical University of South Carolina, Charleston, SC, ²Medicine/ Rheumatology & Immunology, Medical University of South Carolina, Charleston, SC, ³Department of Medicine, Division of Rheumatology, Medical University of South Carolina, Charleston, SC
Background/Purpose: Human mesenchymal stem cells (MSC) are progenitor cells that have immunomodulatory properties. MSCs have been used to treat a variety of autoimmune diseases, including…

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