Abstracts tagged "B-Lymphocyte"

Abstract Number: 0928 • ACR Convergence 2023
Skewing of B Cell Receptor Repertoire in Unswitched Memory B Cells Is Associated with Disease Activity of Systemic Lupus Erythematosus and Targeted by Belimumab
Keishi Fujio¹, Mineto Ota¹, Masahiro Nakano², Yasuo Nagafuchi³, Satomi Kobayashi¹, Hiroaki Hatano², Ryochi Yoshida¹, Yuko Akutsu¹, Takahiro Itamiya¹, Nobuhiro Ban⁴, Yumi Tsuchida¹, Hirofumi Shoda¹, Kazuhiko Yamamoto⁵, Kazuyoshi Ishigaki⁶ and Tomohisa Okamura⁷, ¹Department of Allergy and Rheumatology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan, ²Laboratory for Autoimmune Diseases, RIKEN Center for Integrative Medical Sciences, Tokyo, Japan, ³Department of Allergy and Rheumatology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan, Department of Functional Genomics and Immunological Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan, ⁴Research Division, Chugai Pharmaceutical Co., Ltd., Yokohama, Japan, ⁵Department of Allergy and Rheumatology, Graduate School of Medicine, The University of Tokyo and Laboratory for Autoimmune Diseases, Center for Integrative Medical Sciences, RIKEN, Yokohama, Japan, ⁶RIKEN, Tokyo, Japan, ⁷Department of Allergy and Rheumatology, Graduate School of Medicine, The University of Tokyo and Department of Functional Genomics and Immunological Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
Background/Purpose: Despite the involvement of B cells in the pathogenesis of immune-mediated diseases, the biological mechanisms underlying their function are poorly understood. To address this…
Abstract Number: 2602 • ACR Convergence 2023
Spatially Resolved Cellular Signatures Predict Corticosteroid Treatment Response in Giant Cell Arteritis
Cecilia Ansalone¹, Sam McAllister², Ethan Pickerill³, Lin Zhang³, Annie Peacock², Dominic McGovern⁴, Holly Leslie⁵, Victoria Kellior², Evelyn Qian², David Gemperline³, Aysin Tulunay Virlan², Sylvia Wright⁶, Paul Cauchi⁶, Timothy Beckman⁶, Lisa Hutton⁶, John Cole¹, Isabella Wulur³, Robert Benschop³, Nigel Jamieson⁵, Carl Goodyear¹ and Neil Basu¹, ¹University of Glasgow, Glasgow, United Kingdom, ²University of Glasgow - School of Infection & Immunity, Glasgow, United Kingdom, ³Eli Lilly and Company, Indianapolis, IN, ⁴University of Glasgow - School of Medicine, Glasgow, United Kingdom, ⁵University of Glasgow - School of Cancer Sciences, Glasgow, United Kingdom, ⁶NHS Greater Glasgow and Clyde, Glasgow, United Kingdom
Background/Purpose: Corticosteroids (CS) remain the mainstay of giant cell arteritis (GCA) therapy. Between ~30-70% patients relapse following CS taper and are consequently at risk of…
Abstract Number: 0014 • ACR Convergence 2023
The 330 Genetic Risk Loci of Systemic Lupus Erythematosus (SLE) Now Known Are Consonant with Multiple Causal Mechanisms Involving Epstein-Barr Virus (EBV)-Encoded Transcription Co-factors (TFs) in EBV-Infected B Cells
Viktoryia Laurynenka¹, Xiaoting Chen², sreeja Parameswaran², Leah Kottyan², Matthew Weirauch², Iouri Chepelev³, Kenneth Kaufman³ and John Harley³, ¹Cincinnati Children's Hospital Medical Center, Cincinnati, OH, ²Cincinnati Children's Hospital Medical Center, Cincinnati, OH, ³US Department of Veterans Affairs Medical Center, Cincinnati, OH
Background/Purpose: Association of EBV infection with SLE, data suggesting an anti-EBNA1 molecular mimicry fostering SLE autoimmunity, and mechanisms in EBV infected B cells support a…
Abstract Number: 0932 • ACR Convergence 2023
The Landscape of Immune Cells in Systematic Lupus Erythematosus Patients with Epstein-Barr Virus Infection by Single-cell Sequencing
Lingzhen Hu¹, Jianxin Tu¹, Jiajun Gui², Mengyuan Fang², Xiaowei Chen¹ and Li Sun¹, ¹The First Affliated Hospital of Wenzhou Medical University, Wenzhou, China, ²The First Clinical College, Wenzhou Medical University, Wenzhou, China
Background/Purpose: This study aimed to analyze the immune cell profiles, especially B cells and B-cell receptor (BCR) of systematic lupus erythematosus (SLE) patients with or…
Abstract Number: 0082 • ACR Convergence 2023
A VAV1-Directed Molecular Glue Degrader, MRT-6160, Reduces Joint Inflammation in a Collagen-Induced Arthritis Autoimmune Disease Model
Adam Cartwright¹, Foram Desai², Sophia Nguyen², Alexandra Trouilloud², Elisa Liardo¹, Daric Wible², Ilaria Lamberto², Bradley Demarco², Chris King², Debora Bonenfant¹, Sharon Townson², Owen Wallace², Filip Janku², Laura McAllister¹, Alison Paterson² and Marisa Peluso², ¹Monte Rosa Therapeutics, Basel, Switzerland, ²Monte Rosa Therapeutics, Boston, MA
Background/Purpose: VAV1 is a member of the VAV family of guanine nucleotide exchange factors (GEFs) and plays a critical role in mediating T- and B-cell…
Abstract Number: 0951 • ACR Convergence 2023
Single Cell Analysis of Transitional B Cells in Systemic Sclerosis Highlights Defective Peripheral Tolerance
Claire Beesley¹, Nina Goldman¹, David Abraham¹, Christopher Denton¹, Rizgar Mageed² and Voon Ong³, ¹University College London, London, United Kingdom, ²Queen Mary University of London, London, United Kingdom, ³UCL Medical School Royal Free Campus, London, United Kingdom
Background/Purpose: Transitional B cells comprise a distinct population of B cells that have recently migrated to the periphery from the bone marrow. In systemic sclerosis…
Abstract Number: 0644 • ACR Convergence 2022
Long-lived Plasma Cells in the Lupus Bone Marrow Are Imprinted by Interferon
Jennifer Barnas¹, Diana Alzamareh², Neha Nandedkar-Kulkarni², Jennifer Albrecht², Nida Meednu², Cameron Baker², Andrew McDavid¹ and Jennifer Anolik², ¹University of Rochester, Rochester, NY, ²University of Rochester Medical Center, Rochester, NY
Background/Purpose: Systemic lupus erythematous (SLE) is a complex autoimmune disorder with heterogeneous disease presentation and a multi-pronged pathogenesis. Although autoreactive plasma cells (PC) play a…
Abstract Number: 1651 • ACR Convergence 2022
CAR T Cell Treatment of Refractory Systemic Lupus Erythematosus
Georg Schett¹, Sebastian Böltz², Fabian Müller², Arnd Kleyer³, Simon Völkl², Michael Aigner², Regina Gary², Sascha Kretschmann², David Simon³, Soraya Kharboutli², Dimitrios mougiakakos⁴, Gerhard Kroenke³ and Andreas Mackensen², ¹Universitätsklinikum Erlangen, Erlangen, Germany, ²FAU Erlangen-Nürnberg, Erlangen, Germany, ³Department of Internal Medicine 3 – Rheumatology and Immunology, Friedrich-Alexander-University Erlangen-Nürnberg and Universitätsklinikum Erlangen, 91054 Erlangen, Germany; Deutsches Zentrum Immuntherapie, Friedrich-Alexander-UniversityErlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany, ⁴University of Magdeburg, Magdeburg, Germany
Background/Purpose: Chimeric antigen receptor (CAR) T cells have been used to treat refractory forms of B cell and plasma cell malignancies. B cells are also…
Abstract Number: 0006 • ACR Convergence 2022
Oral Administration of a Novel Pyrrolopyrimidine Derivative That Inhibits BAFF Signaling Suppresses B Cell Differentiation and Production of Autoantibody in Autoimmune Model Mice
Keiko Yoshimoto¹, Katsuya Suzuki², Yumi Ikeda¹, Tsutomu Takeuchi³ and Yuko Kaneko⁴, ¹Div. of Rheumatology, Keio University School of Medicine, Tokyo, Japan, ²Div. of Rheumatology, Keio University School of Medicine, Shinjuku, Japan, ³Keio University and Saitama Medical University, Tokyo, Japan, ⁴Keio University, Tokyo, Japan
Background/Purpose: We reported that the expression level of a BAFF receptor (BR3) was upregulated in peripheral monocytes of patients with primary Sjogren's syndrome (pSS) and…
Abstract Number: 0754 • ACR Convergence 2022
Persistent but Disturbed Germinal Center Reaction Among 3rd SARS-CoV-2 Vaccination After Rituximab Exposure
Ana-Luisa Stefanski¹, Hector Rincon-Arevalo¹, Eva Schrezenmeier², Franziska Szelinski¹, Jacob Ritter³, Yidan Chen¹, Christian Meisel⁴, Hubert Schrezenmeier⁵, Andreia C. Lino⁶ and Thomas Dörner¹, ¹Department of Rheumatology and Clinical Immunology, Charité Universitätsmedizin Berlin, Berlin, Germany, ²Department of Nephrology and Medical Intensive Care, Charité Universitätsmedizin Berlin; DRFZ Berlin; Berlin Institute of Health Charité Universitätsmedizin Berlin, Berlin, Germany, ³Department of Rheumatology and Clinical Immunology, Berlin Institute of Health Charité Universitätsmedizin Berlin, Berlin, Germany, ⁴Department of Medical Immunology, Charité University Medicine and Labor Berlin-Charité Vivantes, Berlin, Germany, ⁵Institute of Transfusion Medicine, Ulm University, Ulm, Germany and Institute for Clinical Transfusion Medicine and Immunogenetics, German Red Cross Blood Transfusion Service Baden-Württemberg – Hessen and University Hospital Ulm, Ulm, Germany, ⁶Deutsches Rheuma-Forschungszentrum Berlin, Berlin, Germany
Background/Purpose: Durable vaccine-mediated immunity relies on the generation of long-lived plasma cells and memory B cells (MBCs), differentiating upon germinal center (GC) reactions. SARS-CoV-2 mRNA…
Abstract Number: 1700 • ACR Convergence 2022
IL-21/STAT3 Pathway Mediated Th2-like Vδ2 T Cells Promote Plasmablasts Differentiation in IgG4-Related Disease
Jieqiong Li¹ and Wen Zhang², ¹Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing, China, ²Peking Union Medical College Hospital, Beijing, China
Background/Purpose: To explore the phenotype and role of gamma delta (γδ) T cells in the pathogenesis of IgG4-related disease (IgG4-RD), focusing on the effect on…
Abstract Number: 0008 • ACR Convergence 2022
CD11c+ T-Bet+ B Cells Traffic to Human Bone Marrow
Jennifer Barnas¹, Diana Alzamareh², Nida Meednu² and Jennifer Anolik², ¹University of Rochester, Rochester, NY, ²University of Rochester Medical Center, Rochester, NY
Background/Purpose: CD11c+ age/autoimmunity-associated B cells (ABC) are associated with autoantibody producing cells and disease flare in systemic lupus erythematosus. ABC were initially identified in aged…
Abstract Number: 0775 • ACR Convergence 2022
The Distribution and Frequency of Autoreactive B Cells Are Altered in Autoimmune Patients After TNF Inhibitor Treatment
Tam Quach¹, Meggan Mackay², Cynthia Aranow² and Anne Davidson², ¹Feinstein Institute for Medical Research, Manhasset, NY, ²Feinstein Institutes for Medical Research, Manhasset, NY
Background/Purpose: The development of new autoantibodies and secondary autoimmunity is a common and significant side effect of TNF inhibitors (TNFi) which are widely used to…
Abstract Number: 1713 • ACR Convergence 2022
Bank1 Signaling Shapes the Gut Microbiota Composition by Controlling the Gut Mucosal B-cell Response in Lupus
Georgina Galicia-Rosas, María Botía Sánchez, Daniel Toro-Domínguez, Lorena Albadalejo and Marta Alarcon-Riquelme, Center for Genomics and Oncological Research (GENYO), Granada, Spain
Background/Purpose: Mucosa-associated commensal bacteria have been shown to be involved in the pathogenesis of systemic lupus erythematosus (SLE). However, its exact role remains to be…
Abstract Number: 0011 • ACR Convergence 2022
B Cell Subsets Contributing to the Autoreactive Plasma Cell Pool in Lyn-/- Mice
Kristina Ottens, Jalyn Schneider and Anne Satterthwaite, UT Southwestern Medical Center, Dallas, TX
Background/Purpose: Systemic Lupus Erythematosus (SLE) is characterized by autoantibodies (autoAbs) against nucleic acid containing antigens. These antibodies form immune complexes that promote inflammation and cause organ…

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