Abstracts tagged "B-Lymphocyte"

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…
Abstract Number: 0778 • ACR Convergence 2022
TNF Inhibitors Display a Modulatory Effect on Serological and Cellular Vaccine Response in Patients with Chronic Inflamatory Diseases
Ulf Geisen¹, Ruben Rose², Dennis Berner³, Hayley Reid³, Jan Schirmer⁴, Florian Tran⁵, Sascha Gerdes⁶, Stefan Schreiber⁷, Andi Krumbholz¹, Petra Bacher⁷ and Bimba Hoyer¹, ¹UKSH Kiel, Kiel, Germany, ²Dep Infectiology UKSH Kiel, Kiel, Germany, ³Dep Rheumatology and clinical Immunology, UKSH Kiel, Kiel, Germany, ⁴University Medical Center Schleswig-Holstein, Kiel, Germany, ⁵Medical Department, UKSH Kiel, Kiel, Germany, ⁶Dermatology, UKSH Kiel, Kiel, Germany, ⁷Institute of Clinical Molecular Biology, Christian-Albrechts-Universität zu Kiel, Kiel, Germany
Background/Purpose: Background: The ongoing pandemic is an immunological challenge when using immune modulating drugs. The mRNA vaccines against SARS-CoV-2 are safe and efficient in most…
Abstract Number: 1715 • ACR Convergence 2022
Ezh2 Knockout in B Cells Impairs Plasmablast Differentiation and Ameliorates Lupus-like Disease in MRL/lpr Mice
Xiaoqing Zheng¹, Mikhail Dozmorov², Colleen Strohlein¹, Sheldon Bastacky¹ and Amr Sawalha¹, ¹University of Pittsburgh, Pittsburgh, PA, ²Virginia Commonwealth University, Richmond, VA
Background/Purpose: Enhancer of zeste homolog 2 (EZH2) has been shown to regulate early B cell development and the differentiation of antibody secreting cells (ASCs). We…
Abstract Number: 0012 • ACR Convergence 2022
Role of Type L IFN Signaling on B Cell Pathogenicity in Early Sjögren’s Disease in Mouse Model
Merri-Grace Allred and Scott Lieberman, University of Iowa, Iowa City, IA
Background/Purpose: Sjogren's disease is a chronic autoimmune disease autoimmune disease characterized by foci of inflammation of the lacrimal and salivary glands. As disease progresses, B…
Abstract Number: 0780 • ACR Convergence 2022
B-cell Reconstitution Is Associated with COVID-19 Booster Vaccine Responsiveness in Previously Seronegative Rituximab Treated Rheumatic Disease Patients
Kaitlin Schultz, Deanna Jannat-Khah, DrPH, MSPH and Robert Spiera, Hospital for Special Surgery, New York, NY
Background/Purpose: Booster doses of SARS-CoV-2 vaccines continue to serve as an important strategy for containing the pandemic and may be especially important to rituximab treated…
Abstract Number: 1868 • ACR Convergence 2022
B Cell Count in Juvenile Dermatomyositis: A Biomarker of Disease
Christopher Costin¹, Gabrielle Morgan², Amer Khojah³ and Lauren Pachman⁴, ¹Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL, ²Ann & Robert H. Lurie Children's Hospital of Chicago and Northwestern University Feinberg School of Medicine, Chicago, IL, ³Umm Al-Qura University, Makkah, Saudi Arabia, ⁴Northwestern's Feinberg School of Medicine. Ann and Robert H. Lurie Children's Hospital of Chicago; Stanley Manne Children's Research Institute of Chicago, Lake Forest, IL
Background/Purpose: Juvenile Dermatomyositis(JDM) is heterogenous disease with many presentations. The underlying immune pathophysiology of JDM remains complex with varying phenotypes. B Cells remain a critical…
Abstract Number: 0013 • ACR Convergence 2022
Binding of CXCL13 with Heparan Sulfate of Syndecan-1 Plays an Important Role in Pathogenesis of Sjögren’s Syndrome
Eon Jeong Nam¹, Na Ri Kim¹ and Gun Woo Kim², ¹Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea, ²Daegu Fatima Hospital, Daegu, Republic of Korea
Background/Purpose: Sjögren's syndrome (SS) is a chronic autoimmune disorder with lymphocytic infiltration in exocrine and non-exocrine epithelia, in which epithelial cells play a critical role…
Abstract Number: 0781 • ACR Convergence 2022
Rituximab Treated Patients with Hypogammaglobulinemia Are Less Likely to Seroconvert Following SARS-CoV-2 Vaccine Supplemental Dose
Daniel Magliulo¹, Vasileios Kyttaris¹ and Emily Rose², ¹Beth Israel Deaconess Medical Center, Boston, MA, ²Beth Israel Deaconess Medical Center, West Roxbury, MA
Background/Purpose: Rituximab (RTX) is a very effective treatment for autoimmune rheumatic diseases (AIRD). However, treatment increases risk of infections and impairs responses to vaccines. Prior…
Abstract Number: 1869 • ACR Convergence 2022
Looking for BlyS(BAFF) in Juvenile Dermatomyositis: A New Biomarker of Disease Activity
Christopher Costin¹, Gabrielle Morgan², Amer Khojah³ and Lauren Pachman⁴, ¹Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL, ²Ann & Robert H. Lurie Children's Hospital of Chicago and Northwestern University Feinberg School of Medicine, Chicago, IL, ³Umm Al-Qura University, Makkah, Saudi Arabia, ⁴Northwestern's Feinberg School of Medicine. Ann and Robert H. Lurie Children's Hospital of Chicago; Stanley Manne Children's Research Institute of Chicago, Lake Forest, IL
Background/Purpose: B Cell Activating Factor (BAFF) is a cytokine that drives B Cell proliferation and maturation. B Cells remain an important factor in JDM immune…
Abstract Number: 0014 • ACR Convergence 2022
The Expanded CD21 Low B Cell Subpopulation in Ankylosing Spondylitis Consists Mainly of Antigen-Inexperienced Cells
Rick Wilbrink¹, Linda van der Weele², Anneke Spoorenberg¹, Niek De Vries², Frans Kroese¹ and Gwenny Verstappen¹, ¹University Medical Center Groningen, Groningen, Netherlands, ²University Medical Center Amsterdam, Amsterdam, Netherlands
Background/Purpose: The role of B cells in the pathogenesis of ankylosing spondylitis (AS) remains relatively understudied. Nevertheless, available evidence shows presence of B cells at…

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