Abstracts tagged "Anti-citrullinated Protein Autoantibodies (ACPAs)"

Abstract Number: 1648 • ACR Convergence 2024
In Vitro Expansion of ACPA-positive B Cells from Rheumatoid Arthritis Patients and Effect of Small Molecule NF-κB Inhibitors on Differentiation and Survival of (Autoreactive) Memory B Cells into Plasma Cells
Giulia Frazzei¹, Ana Merino Vico², Jan Piet van Hamburg², Ronald Van Vollenhoven³ and Sander Tas⁴, ¹Amsterdam University Medical Center, location AMC, Amsterdam, Netherlands, ²Amsterdam UMC, Amsterdam, Netherlands, ³Department of Rheumatology and Clinical Immunology, Amsterdam University Medical Centers, Amsterdam, Netherlands, ⁴Amsterdam UMC, locatie AMC, Amsterdam, Netherlands
Background/Purpose: Anti-citrullinated protein antibodies (ACPA) play a role in rheumatoid arthritis (RA) pathogenesis and are associated with disease severity. Detailed analysis of ACPApos B cells…
Abstract Number: 1679 • ACR Convergence 2024
Differential Pharmacodynamic Changes of Circulated Immune Subsets After Treatment with Abatacept or Adalimumab in Patients with ACPA+ Early RA in the AMPLIFIED Study
Nathanial Eddy¹, Jane Buckner², Paul Emery³, Michael Weinblatt⁴, Vivian Bykerk⁵, Andrew Cope⁶, Gerd Burmester⁷, Yoshiya Tanaka⁸, Gustavo Citera⁹, Peter Nash¹⁰, Quentin Dornic¹¹, Peter Schafer¹², Sheila Kelly¹³, Michael Maldonado¹¹ and Jinqi Liu¹¹, ¹Bristol Myers Squibb, Princeton, ²Benaroya Research Institute, Seattle, WA, ³University of Leeds, Leeds, United Kingdom, ⁴Brigham and Women's Hospital/ Harvard Medical School, Waban, MA, ⁵Hospital For Special Surgery, New York, NY, ⁶King's College London, London, United Kingdom, ⁷Department of Rheumatology and Clinical Immunology, Charité – Universitätsmedizin Berlin, Berlin, Germany, ⁸Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Fukuoka, Japan, ⁹Instituto de Rehabilitación Psicofísica, Buenos Aires, Argentina, ¹⁰Griffith University, Brisbane, Australia, ¹¹Bristol Myers Squibb, Princeton, NJ, ¹²Bristol Myers Squibb, BELLE MEAD, NJ, ¹³Bristol Myers Squibb, Doylestown, PA
Background/Purpose: Despite considerable advances in pharmacologic approaches to RA management, a better understanding of the underlying immunopathology is still needed.1,2 A dysregulated immune system is…
Abstract Number: 0039 • ACR Convergence 2024
Blockade of Soluble and Cell Surface PAD Activity Prevents the Generation of Citrullinated Autoantigens Recognized by RA Patients’ Serum
Lacie Scaletta¹, Teneema Kuriakose¹, Sambit Nanda¹, Mia Collins², Erika Darrah³, Iain McInnes⁴, David Close⁵ and Gary Sims¹, ¹Immunology Biosciences, Research and Early Development, Respiratory and Immunology (R&I), BioPharmaceuticals R&D, AstraZeneca, Gaithersburg, MD, ²Translational Science and Experimental Medicine, Research and Early Development, Respiratory and Immunology (R&I), BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden, ³Translational Science and Experimental Medicine, Research and Early Development, Respiratory and Immunology (R&I), BioPharmaceuticals R&D, AstraZeneca, Gaithersburg, MD, ⁴University of Glasgow, College of Medical Veterinary and Life Sciences, Glasgow, United Kingdom, ⁵Early Clinical Development, Research and Early Development, Respiratory and Immunology (R&I), BioPharmaceuticals R&D, AstraZeneca, Cambridge, United Kingdom
Background/Purpose: Anti-citrullinated protein autoantibodies (ACPA) promote inflammation and joint tissue injury and define a poor prognostic group of patients with rheumatoid arthritis (RA). Citrullinated autoantigens…
Abstract Number: 1871 • ACR Convergence 2024
A Seropositive RA Polygenic Risk Score Does Not Predict Progression to RA in an ACPA Positive Population
Tada Vargas¹, Lauren Vanderlinden², Patrick Carry³, Kristen Demoruelle⁴, Marie Feser¹, Katerina Kechris⁵, Jane Buckner⁶, William Robinson⁷, Gary Firestein⁸, Michael Holers¹, Kevin Deane⁹ and Jill Norris¹⁰, ¹Division of Rheumatology, University of Colorado School of Medicine, Aurora, CO, ²Colorado School of Public Health, Monument, CO, ³Department of Orthopedics, University of Colorado School of Medicine, Aurora, CO, ⁴University of Colorado Anschutz Medical Campus, Golden, CO, ⁵Department of Biostatistics and Informatics, Colorado School of Public Health, University of Colorado Anschutz Medical Campus, Aurora, CO, ⁶Benaroya Research Institute, Seattle, WA, ⁷Division of Immunology and Rheumatology, Stanford University, and VA Palo Alto Health Care System, Stanford, CA, ⁸University of California, San Diego, San Diego, CA, ⁹University of Colorado Denver Anschutz Medical Campus, Aurora, CO, ¹⁰Colorado School of Public Health, Denver, CO
Background/Purpose: Serum autoantibodies, such as ACPA and RF, are commonly detectable prior to the development of seropositive clinical RA; however, not all individuals with these…
Abstract Number: 0045 • ACR Convergence 2024
Proteomic Analysis of the Rheumatoid Arthritis Citrullinome Reveals an Enrichment of Citrullinated Complement Proteins
Khushali Trivedi¹, Clarissa Klenke², Jun Kim¹, Jeba Atkia Maisha², Alina Sememenko¹, XIAOBO MENG², Mario Navarrete¹, Hani El-Gabalawy² and Liam O'Neil², ¹University of Manitoba, Winnipeg, Canada, ²University of Manitoba, Winnipeg, MB, Canada
Background/Purpose: Citrullination is a key physiological process that drives autoantibody formation in Rheumatoid Arthritis (RA). This irreversible post-translational modification of the amino acid arginine is…
Abstract Number: 2168 • ACR Convergence 2024
Two Year Data on Quality of Life, Pain and Mobility Scores After Rituximab Treatment in the Preclinical Phase of Rheumatoid Arthritis
Giulia Frazzei¹, Sophie Cramer¹, Robert Landewé², Karen Maijer³, Danielle Gerlag⁴, Paul Tak, MD PhD⁵, Niek De Vries⁶, Lisa van Baarsen⁶, Ronald Van Vollenhoven⁷ and Sander Tas⁸, ¹Amsterdam University Medical Center, location AMC, Amsterdam, Netherlands, ²Amsterdam University Medical Center, Meerssen, Netherlands, ³Tergooi Hospital, Hilversum, Amsterdam, Netherlands, ⁴UCB, Cambridge, United Kingdom, ⁵Candel Therapeutics, Cambridge, United Kingdom, ⁶Amsterdam UMC, Amsterdam, Netherlands, ⁷Department of Rheumatology and Clinical Immunology, Amsterdam University Medical Centers, Amsterdam, Netherlands, ⁸Amsterdam UMC, locatie AMC, Amsterdam, Netherlands
Background/Purpose: Over the past 10 years, several trials have investigated prevention of rheumatoid arthritis (RA) by disease modifying antirheumatic drug (DMARD) therapies. Early treatment of…
Abstract Number: 0046 • ACR Convergence 2024
Impaired Neutrophil Extracellular Trap (NET) Degradation in Rheumatoid Arthritis (RA) and Pre-clinical RA Is Mediated by Anti-NET Antibodies
Jeba Atkia Maisha¹, Alina Sememenko², Jun Kim², Mario Navarrete², XIAOBO MENG¹, Hani El-Gabalawy¹ and Liam O'Neil¹, ¹University of Manitoba, Winnipeg, MB, Canada, ²University of Manitoba, Winnipeg, Canada
Background/Purpose: Rheumatoid Arthritis (RA) begins after a prolonged preclinical phase which is marked by the development of RA antibodies, typically against citrullinated proteins (ACPA). The…
Abstract Number: 2247 • ACR Convergence 2024
Pro-inflammatory Monocytes and CD11c Expression in ACPA Positive Individuals with Arthralgia and Their Associations with Subclinical Synovitis Preceding the Onset of Arthritis
Klára Prajzlerová¹, Olga Kryštufková², Petra Hánová¹, Nora Růžičková², Hana Hulejová¹, Jiří Vencovský², Ladislav Šenolt² and Mária Filková², ¹Institute of Rheumatology, Prague, Czech Republic, ²Institute of Rheumatology and Department of Rheumatology, First Faculty of Medicine, Charles University, Prague, Czech Republic
Background/Purpose: Autoantibodies, e.g., against citrullinated proteins (ACPA), increase the risk of clinical arthritis and can be detected years before rheumatoid arthritis (RA) onset. EULAR's definition…
Abstract Number: 0056 • ACR Convergence 2024
Association of Soluble Immune Checkpoint Proteins with the Risk of Developing RA in ACPA-positive At-risk Individuals
Ryo Motoyama¹, Shohei Nakamura¹, Eisuke Inoue², Hideto Takada³, Masayoshi Harigai⁴ and Yuko okamoto¹, ¹Tokyo Women's Medical University, Tokyo, Japan, ²Showa University, Tokyo, Japan, ³Tokyo Women's Medical University, Denver, CO, ⁴International University of Health and Welfare, Tokyo, Japan
Background/Purpose: ACPA+ individuals without inflammatory arthritis are considered as being in an at-risk state of RA, although further factors are needed to identify individuals with…
Abstract Number: 2671 • ACR Convergence 2024
Subcutaneous Abatacept vs Adalimumab Head-to-Head Comparison in Adults with Early, Dual Seropositive Rheumatoid Arthritis, Positive for the Shared Epitope HLA Class II Risk Alleles, and an Inadequate Response to Methotrexate: Results from a Phase 3 Trial
Michael Weinblatt¹, Paul Emery², Vivian Bykerk³, Andrew Cope⁴, Gerd Burmester⁵, Yoshiya Tanaka⁶, Gustavo Citera⁷, Peter Nash⁸, Quentin Dornic⁹, Sheila Kelly¹⁰ and Michael Maldonado⁹, ¹Brigham and Women's Hospital/ Harvard Medical School, Waban, MA, ²University of Leeds, Leeds, United Kingdom, ³Hospital For Special Surgery, New York, NY, ⁴King's College London, London, United Kingdom, ⁵Department of Rheumatology and Clinical Immunology, Charité – Universitätsmedizin Berlin, Berlin, Germany, ⁶Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Fukuoka, Japan, ⁷Instituto de Rehabilitación Psicofísica, Buenos Aires, Argentina, ⁸Griffith University, Brisbane, Australia, ⁹Bristol Myers Squibb, Princeton, NJ, ¹⁰Bristol Myers Squibb, Doylestown, PA
Background/Purpose: For patients (pts) early in their RA disease course, with a clinical profile characterized by inadequate response to MTX (MTX-IR), high titers of ACPA…
Abstract Number: 0057 • ACR Convergence 2024
Flow Cytometry of Cells Within Induced Sputum from Individuals At-Risk for RA Reveals Relative Expansion of Small Macrophages
Hideto Takada¹, Brian Hattel², Marie Feser³, LauraKay Moss², Yuko Okamoto⁴, Mark Gillespie⁵, Adam Savage⁵, Troy Torgerson⁶, V. Michael Holers⁷, Kevin Deane⁸ and Kristen Demoruelle⁹, ¹Tokyo Women's Medical University, Denver, CO, ²University of Colorado Anschutz Medical Campus, Denver, CO, ³Division of Rheumatology, University of Colorado School of Medicine, Aurora, CO, ⁴Tokyo Women's Medical University Division of Rheumatology, Shinjyuku-ku, Tokyo, Japan, ⁵Allen Institute for Immunology, Seattle, WA, ⁶Allen Institute for Immunology, Enumclaw, WA, ⁷University of Colorado, Denver, CO, ⁸University of Colorado Denver Anschutz Medical Campus, Aurora, CO, ⁹University of Colorado Anschutz Medical Campus, Golden, CO
Background/Purpose: Serum elevations of ACPA in the absence of inflammatory arthritis is a well-established risk factor for the future development of clinical RA. The lung…
Abstract Number: 0064 • ACR Convergence 2024
Anti-Citrullinated Protein Antibodies Arise During Affinity Maturation of Germline-Encoded Antibodies to Carbamylated Proteins in Rheumatoid Arthritis
Marta Escarra-Senmarti¹, Michael Chungyoun², Dylan Ferris¹, Jeffrey Gray² and Felipe Andrade³, ¹The Johns Hopkins University School of Medicine, Baltimore, MD, ²The Johns Hopkins Whiting School of Engineering, Baltimore, MD, ³The Johns Hopkins University School of Medicine, Timonium, MD
Background/Purpose: The production of antibodies to modified self-antigens is a hallmark in rheumatoid arthritis (RA). Antibodies to citrullinated (ACPAs) and carbamylated proteins (CarP) are of…
Abstract Number: 0065 • ACR Convergence 2024
Evidence of Membranolytic Targeting and Intracellular Citrullinationin Neutrophils Isolated from Patients with Rheumatoid Arthritis
Neela Fatemeh Moadab¹, Tal Gazitt², Rayan Najjar¹, Ethan Le¹, J Lee Nelson³, Vijay Joshua⁴, Keith Elkon¹, Caroline Grönwall⁴ and Tomas Mustelin¹, ¹University of Washington, Seattle, WA, ²Carmel Hospital, Haifa, Israel, ³University of Washington and Fred Hutchinson Cancer Center, Seattle, WA, ⁴Karolinska Institutet, Stockholm, Sweden
Background/Purpose: Anti-citrullinated protein autoantibodies (ACPA) are diagnostic for rheumatoid arthritis (RA). The antigens recognized by these autoantibodies are produced by protein arginine deiminases (PADs), particularly…
Abstract Number: 0392 • ACR Convergence 2024
Evaluation for the Presence of Antibodies to Malondialdehyde-Acetaldehyde Adduct in Juvenile Idiopathic Arthritis and Its Subtypes
Geoffrey Thiele¹, Panteha Hayati Rezvan², Michal Cidon², Carlos Hunter³, Michael Duryee³, Ted Mikuls³ and Geoffrey Thiele³, ¹Children's Hospital of Los Angeles, Omaha, NE, ²Children's Hospital of Los Angeles, Los Angeles, CA, ³University of Nebraska Medical Center, Omaha, NE
Background/Purpose: Studies of rheumatoid arthritis (RA) have shown that malondialdehyde-acetaldehyde (MAA) protein adducts and anti-MAA immune responses play a pathogenic role in disease progression. Expression of…
Abstract Number: 0458 • ACR Convergence 2024
Long-Term Outcomes in Seronegative Rheumatoid Arthritis
Bradly Kimbrough¹, Cynthia Crowson², Sara Achenbach³ and Elena Myasoedova², ¹Mayo Clinic Rochester, Rochester, MN, ²Mayo Clinic, Rochester, MN, ³Mayo Clinic, Rochester, Rochester, MN
Background/Purpose: Seronegative rheumatoid arthritis (RA) is a heterogenous disease distinct from seropositive RA regarding genetic risk factors, pathobiology, and prognosis. Notably, recent studies have shown…

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