Abstracts tagged "immunology"

Abstract Number: 0005 • ACR Convergence 2023
Obexelimab Inhibits B Cell Activation and May Interfere with B Cell Chemotaxis in IgG4-Related Disease
Thomas Guy¹, Hang Liu², Vinay Mahajan², Cory Perugino³, Zachary Wallace⁴, Shauna quinn⁵, Allen Poma⁶, Debra Zach⁷, John Stone⁸ and Shiv Pillai⁹, ¹Ragon Institute of MGH, MIT and Harvard, Cambridge, MA, ²Ragon Institute, Cambridge, MA, ³Massachusetts General Hospital, Boston, MA, ⁴Massachusetts General Hospital, Newton, MA, ⁵Zenas Biopharma, New York, NY, ⁶Zenas Biosciences, New York, NY, ⁷Exagen, Vista, CA, ⁸Massachusetts General Hospital Rheumatology Unit, Harvard Medical School, Concord, MA, ⁹Harvard Medical School, Boston, MA
Background/Purpose: Obexelimab is a bifunctional, non-cytolytic, humanized monoclonal antibody that binds CD19 and ligates FcγRIIb with high affinity. Data from a phase 2 clinical trial…
Abstract Number: 0089 • ACR Convergence 2023
Pre-Clinical Characterization of MTX-101, a Novel Bispecific CD8 Treg Modulator with the Potential to Restore CD8 Treg Functions in Patients with Rheumatological Autoimmune Diseases
Daniel Patton, Meghan Maurer, Nadine Morgan, Minh Pham, Daniel Boster, Justin Huard, Cathy Tan, Rachael Fasnacht, Monica Childs, Gleda Hermansky, Alex Chen, Susan Julien, Jennifer Gardell, Cathy McMahan, Courtney Crane and Kristine Swiderek, Mozart Therapeutics, Seattle, WA
Background/Purpose: In healthy individuals, CD8 Treg activation leads to selective elimination of aberrantly activated self-reactive CD4 T cells to maintain immune balance. The CD8 Treg…
Abstract Number: 0727 • ACR Convergence 2023
A Novel Active Pemphigus Vulgaris Mouse Model Induced by Immunization with TLR Ligand Adjuvanted Recombinant Desmoglein 3 Protein Vaccine
Changxing Gao, Zijun Wang and Qianjin Lu, Hospital for Skin Diseases, Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China; Key Laboratory of Basic and Translational Research on Immune-Mediated Skin Diseases, Chinese Academy of Medical Sciences, Nanjing, China. ³. Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, China
Background/Purpose: Pemphigus vulgaris (PV) is an autoimmune bullous skin disease mediated by desmoglein-3 (Dsg3) specific auto-antibody present in skin and mucosae. The binding of pathogenic…
Abstract Number: 1599 • ACR Convergence 2023
Single-Cell RNA Sequencing Reveals Cellular Drivers of UV-mediated Skin Injury in Cutaneous Lupus
Mitra Maz¹, Feiyang Ma², Mehrnaz Gharaee-Kermani², Amanda Victory², Amy Hurst², Johann E. Gudjonsson² and J. Michelle Kahlenberg², ¹University of Michigan Medical School, Ann Arbor, MI, ²University of Michigan, Ann Arbor, MI
Background/Purpose: Ultraviolet light (UV) is a known trigger of cutaneous lupus erythematosus (CLE) flares in systemic lupus erythematosus (SLE) patients, yet cell populations and mechanisms…
Abstract Number: 2105 • ACR Convergence 2023
Cohort-wide Immuno-phenotype Deconvolute Immunological and Clinical Heterogeneity Across Autoimmune Rheumatic Diseases
Hiroaki Tanaka¹, Yukinori Okada², Shingo Nakayamada¹, Yusuke Miyazaki³, Kyuto Sonehara⁴, Shinichi Namba⁵, Suguru Honda⁶, Yuya Shirai⁷, Kenichi Yamamoto⁵, Katsunori Ikari⁸, Masayoshi Harigai⁹, KOSHIRO SONOMOTO¹⁰ and Yoshiya Tanaka¹, ¹University of Occupational and Environmental Health, Kitakyushu, Japan, ²University of Tokyo / Osaka University / RIKEN, Tokyo, Japan, ³The First Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Kiakyusyu Fukuoka, Japan, ⁴University of Tokyo, Tokyo, Japan, ⁵Osaka University, Osaka, Japan, ⁶Tokyo Women's Medical University, Tokyo, Japan, ⁷Osaka University, Suita, Japan, ⁸Tokyo Women's Medical University School of Medicine, Tokyo, Japan, ⁹Tokyo Women's Medical University, Division of Rheumatology, Department of Internal Medicine, Tokyo, Japan, ¹⁰University of Occupational and Environmental Health, Beppu, Japan
Background/Purpose: Autoimmune rheumatic diseases (AIRDs) are systemic but heterogeneous diseases characterized by orchestration of disrupted self-tolerance of immune systems. We face a challenge in characterizing…
Abstract Number: 2564 • ACR Convergence 2023
The Effectiveness of a Fourth Dose of COVID-19 mRNA Vaccine in Patients with Systemic Autoimmune Rheumatic Diseases Using Immunomodulators: An Emulated Target Trial
Jennifer Hanberg¹, Xiaoqing Fu¹, Xiaosong Wang², Naomi Patel¹, Yumeko Kawano², Abigail Schiff², Emily Kowalski², Claire Cook¹, Kathleen Vanni², Krishan Guzzo¹, Grace Qian², Katarina Bade³, Alene Saavedra², Rathnam Venkat², Shruthi Srivatsan¹, Yuqing Zhang⁴, Jeffrey Sparks⁵ and Zachary Wallace⁶, ¹Massachusetts General Hospital, Boston, MA, ²Brigham and Women's Hospital, Boston, MA, ³Brigham and Women's Hospital, Boston, MA, ⁴Division of Rheumatology, Allergy, and Immunology, Department of Medicine, Massachusetts General Hospital, Boston, MA, ⁵Division of Rheumatology, Inflammation, and Immunity, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA, ⁶Massachusetts General Hospital, Newton, MA
Background/Purpose: Many patients with systemic autoimmune rheumatic diseases (SARDs) using immunomodulators have blunted humoral responses to COVID-19 vaccines. As such, the initial mRNA vaccine series…
Abstract Number: 0010 • ACR Convergence 2023
A Potential Mechanism for Major Adverse Cardiac Events Associated with JAK Inhibitors: JAK Inhibitor Withdrawal Causes Urokinase Release by Primed STAT Signaling
Sara McCoy¹, Ilya Gurevic² and jacques Galipeau², ¹University of Wisconsin School of Medicine and Public Health, Middleton, WI, ²University of Wisconsin, Madison, WI
Background/Purpose: Sjögren’s Disease (SjD) has high glandular IFNg levels, associated with disease activity and lymphoma risk. We showed that IFNg-stimulated minor salivary gland (SG)-mesenchymal stromal…
Abstract Number: 0092 • ACR Convergence 2023
Multi-omics Immune Profiling of Cytotoxic T Cells from Ankylosing Spondylitis Patients Identified a Subset of Clonally Exapnded CTLs That Evade Immune Exhaustion
Michael Tang¹, Zoya Qaiyum², Melissa Lim¹ and Robert Inman¹, ¹University Health Network, Toronto, ON, Canada, ²Krembil Research Institute, Toronto, ON, Canada
Background/Purpose: Sustained chronic inflammation in the spine and of the sacroiliac joints is a key feature in Ankylosing Spondylitis (AS). A central role of CTL…
Abstract Number: 0838 • ACR Convergence 2023
Infusion of Etanercept into the Peripheral Lymphatics Significantly Reduces Disease Activity in Rheumatoid Arthritis Patients with Inadequate Response to Subcutaneous Injections
Russell Ross¹, Vibeke Strand², Roel Querubin³, John Goldman⁴, Richard Leff⁵, Alexis Melson¹, Pei-Ling Roerig⁶ and Alan Smith⁷, ¹Sorrento Therapeutics, Atlanta, GA, ²Stanford University, Portola Valley, CA, ³Marietta Rheumatology Associates, Marietta, GA, ⁴Northside Hospital, Atlanta, GA, ⁵Kezar Life Sciences, Chadds Ford, PA, ⁶4P Therapeutics, Orlando, FL, ⁷4P Therapeutics, Atlanta, GA
Background/Purpose: The lymphatic system serves as a conduit for transporting immune cells and inflammatory molecules present in arthritic joints to lymph nodes (LN), playing a…
Abstract Number: 1637 • ACR Convergence 2023
IgG-Fc-N-Sialylation and -Galactosylation in Primary Sjögren’s Syndrome (Pss) in Its Potential as Marker of Disease State and Disease Activity
Helena Achten¹, Liselotte Deroo², Kristel De Boeck³, Matthias Jarlborg¹, Tine Decruy¹, Joke Deprez¹, Emilie Dumas¹, Dirk Elewaut⁴ and isabelle peene⁵, ¹Ghent University, Ghent, Belgium, ²Ghent University, Gent, Belgium, ³Ghent University Hospital, Ghent, Belgium, ⁴Ghent University and VIB Center for Inflammation Research, Ghent, Belgium, ⁵University Hospital Ghent, Ghent, Belgium
Background/Purpose: Loss of galactose and sialic acid structures attached to the IgG-Fc-fragment switches the antibody effector function from anti-inflammatory to pro-inflammatory1. This study investigated the…
Abstract Number: 2184 • ACR Convergence 2023
Development of Salivary Gland Organoids to Study Sjögren Syndrome
Loïc Meudec¹, Negaar Goudarzi², Juliette Pascaud³, Fanny Jaulin², Xavier Mariette⁴ and Gaetane Nocturne⁵, ¹CHU Kremlin-Bicêtre, Rheumatology, Le Kremlin-Bicêtre, France, ²INSERM UMR 981, Institut Gustave Roussy, Villejuif, France, Villejuif, France, ³Center for Immunology of Viral Infections and Autoimmune Diseases, INSERM UMR 1184, FHU CARE, Université Paris-Saclay, Le Kremlin-Bicêtre, France, ⁴Université Paris-Saclay, Le Kremlin-Bicêtre, France, ⁵APHP, Le Kremlin-Bicêtre, France
Background/Purpose: Sjögren disease (Sjo) is an autoimmune disease characterized by the infiltration of exocrine glands by immune cells, especially salivary glands (SG). SG epithelial cells…
Abstract Number: 0022 • ACR Convergence 2023
Validation of a Transcriptomic-Based Machine Learning Model to Establish the Endotype of SLE Patients
Erika Hubbard¹, Prathyusha Bachali², Kathryn Kingsmore Allison¹, Amrie Grammer¹ and Peter Lipsky¹, ¹AMPEL BioSolutions, Charlottesville, VA, ²AMPEL BioSolutions, Redmond, WA
Background/Purpose: We previously developed a novel machine learning (ML) pipeline leveraging analysis of gene expression data to identify subsets of SLE patients with common molecular…
Abstract Number: 0094 • ACR Convergence 2023
Granzyme K Elicits a New Pathway for Complement Activation in RA Synovium
Anna Helena Jonsson¹, Carlos Donado², Erin Theisen², Dominique Jones¹, Aparna Nathan³, Fan Zhang⁴, Accelerating Medicines Partnership (AMP): RA/SLE¹, Soumya Raychaudhuri¹ and Michael Brenner², ¹Brigham and Women's Hospital, Boston, MA, ²Brigham and Women's Hospital and Harvard Medical School, Boston, MA, ³Harvard Medical School, Boston, MA, ⁴University of Colorado, Aurora, CO
Background/Purpose: T cells are major drivers of rheumatoid arthritis (RA) pathogenesis. While most research has focused on CD4+ T cells, we have found that CD8+…
Abstract Number: 0900 • ACR Convergence 2023
Complement Deposition on Extracellular Mitochondria Induces Platelet Activation in Vitro
Marina Barguil Macedo and Christian Lood, University of Washington, Seattle, WA
Background/Purpose: Mitochondria are extruded upon cell death and platelet activation, being elevated in several inflammatory conditions, including systemic lupus erythematosus (SLE). Mitochondria are immunogenic, with…
Abstract Number: 1651 • ACR Convergence 2023
Beneficial Effect of Temporary Methotrexate Interruption on B and T Cell Responses upon SARSCoV-2 Vaccination in Patients with Rheumatoid Arthritis or Psoriatic Arthritis
Esther Vicente Rabaneda¹, Pedro Martínez-Fleta², Ana Triguero-Martínez², Emilia Roy³, Miren Uriarte-Ecenarro⁴, Francisco Gutiérrez-Rodríguez⁴, Patricia Quiroga⁴, Ana Romero⁴, Nuria Montes², Laura Esparcia Pinedo², María Aranzazu Alfranca², Rosario Garcia-Vicuna⁵, Francisco Sánchez-Madrid², Isidoro González-Álvaro⁴ and Santos Castañeda⁵, ¹Rheumatology, Hospital Universitario de La Princesa, Madrid, Spain, ²Division of Immunology, Hospital Universitario de La Princesa, Madrid, Spain, ³Division of Internal Medicine, Hospital Universitario de La Princesa, Madrid, Spain, ⁴Division of Rheumatology, Hospital Universitario de La Princesa, IIS-Princesa, Madrid, Spain, ⁵Hospital Universitario de la Princesa, Madrid, Spain
Background/Purpose: Previous published works have raised the concern that methotrexate (MTX) might have a negative effect on immune response upon vaccine administration. At the beginning…

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