Abstract Number: 0033 • ACR Convergence 2025
Development and Internal Validation of Two Human Leukocyte Antigen Genetic Risk Scores for Predicting Rheumatoid Arthritis Progression and Anti-Citrullinated Protein Antibody-Positivity
Background/Purpose: Human leukocyte antigen (HLA) class II genes play a central role in antigen presentation and immune modulation. The shared epitope (SE) region within HLA-DRB1…Abstract Number: 2250 • ACR Convergence 2025
Clinical and Serological Predictors of Interstitial Lung Disease in Rheumatoid Arthritis: Are Anti-Citrullinated Protein Antibodies Truly Relevant?
Background/Purpose: Evidence on which risk factors predict the development of interstitial lung disease (ILD) in patients with rheumatoid arthritis (RA) is scarce and of low…Abstract Number: 2248 • ACR Convergence 2025
Elevated Anti-PAD Autoantibodies in a Singaporean Chinese Rheumatoid Arthritis (RA) Cohort with Rheumatoid Factor (RF) and Anti-Citrullinated Protein Antibodies (ACPA) Positivity: A Case-control Exploratory Study
Background/Purpose: Autoantibody-based biomarkers including ACPA and RF are of established clinical use in rheumatoid arthritis (RA) and are ingrained in international classification criteria. However, other…Abstract Number: 1701 • ACR Convergence 2025
Gene Editing of HLA-Class II DRB1*04:01 at Position 82 Abrogates Binding of Citrullinated Arthritogenic Peptides and Collagen
Background/Purpose: Rheumatoid arthritis (RA) is a chronic autoimmune disease with a strong genetic association to Class II HLA-DRB1*04:01. Presentation of arthritogenic peptides bound to DRB1*04:01…Abstract Number: 1678 • ACR Convergence 2025
Abatacept in individuals at risk of developing rheumatoid arthritis: results from the Arthritis Prevention in the Pre-clinical Phase of RA with Abatacept Long Term Outcomes (ALTO) Study
Background/Purpose: Clinical trials aimed at delaying or preventing rheumatoid arthritis (RA) in individuals at risk have been published with variable results. In the APIPPRA study,…Abstract Number: 0914 • ACR Convergence 2025
Preclinical Expansion of Autoreactive Naive B cells Drives RA onset in ACPA+ individuals
Background/Purpose: The cellular and molecular mechanisms underlying the progression from anti-citrullinated protein antibody (ACPA) positivity to clinical rheumatoid arthritis (RA) remain poorly understood. Defining these…Abstract Number: 0833 • ACR Convergence 2025
Sputum Anti-CCP-IgA and NET-Associated Proteins Predict Risk and Timing of the Transition From Systemic Autoimmunity to Classified RA
Background/Purpose: The presence of serum anti-CCP-IgG antibodies can predict the future development of clinically evident RA. Neutrophil extracellular trap (NET) formation can be a source…Abstract Number: 0799 • ACR Convergence 2025
Citrullination of neutrophil serine proteases enhances proteolytic activity, stability and autoantigenicity in Rheumatoid Arthritis
Background/Purpose: In Rheumatoid Arthritis (RA), autoantibodies develop against endogenous proteins containing the amino acid citrulline, which results from a post-translational modification of arginine catalyzed by…Abstract Number: 0471 • ACR Convergence 2025
An Open-label, Randomized, Controlled Phase 1/2 Study to Assess the Safety and Efficacy of KYV-101 Anti-CD19 CAR-T Cell Therapy in Active and Difficult-to-treat ACPA positive Rheumatoid Arthritis: Preliminary Results of the COMPARE Trial
Background/Purpose: Rheumatoid Arthritis (RA) is a chronic autoimmune disease characterized by autoreactive B cells that produce anti-citrullinated protein antibodies (ACPA), contributing to sustained synovial inflammation…Abstract Number: 0078 • ACR Convergence 2025
Citrullinated Serum Albumin Is Not an Autoantigen in Rheumatoid Arthritis
Background/Purpose: Autoantibodies against citrullinated proteins (ACPAs) are diagnostic of rheumatoid arthritis (RA), an autoimmune disease primarily affecting synovial joints. Proteomic analyses have identified human serum…Abstract Number: 0073 • ACR Convergence 2025
HLA-DQA1*01:02 Is Associated With IgG Multi-Reactivity With Citrulline-Containing Type II Collagen Epitopes While HLA-DRB*04:01 Is Associated With More Private Reactivity With Citrulline-Containing IgG Epitopes In Rheumatoid Arthritis
Background/Purpose: Anti-citrullinated protein antibodies (ACPAs) in rheumatoid arthritis (RA) can be promiscuous, with cross-reactive binding to many antigens containing short motifs, or more private with…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
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
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
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
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…
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