Abstract Number: 0754 • ACR Convergence 2022
Persistent but Disturbed Germinal Center Reaction Among 3rd SARS-CoV-2 Vaccination After Rituximab Exposure
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: 2037 • ACR Convergence 2022
Childhood-onset Sjögren’s Syndrome Is Characterised by Dysregulated of B and T Memory Cell Frequencies: A Pilot Immunophenotyping Analysis of This Rare Disease Phenotype
Background/Purpose: Sjögren's syndrome (SS) is an autoimmune rheumatic disease characterised by dryness resulting from chronic lymphocytic infiltration of the exocrine glands and extra glandular manifestations…Abstract Number: 0977 • ACR Convergence 2022
Effect of Belimumab (BEL) on B-cells and Serological Biomarkers for SLE: Results of the Large Integrated Analysis BEL Summary of Lupus Efficacy (Be-SLE)
Background/Purpose: Serological and cellular biomarkers are used in clinical practice to guide the management of SLE. Increased levels of anti-dsDNA and decreased levels of complement…Abstract Number: 2065 • ACR Convergence 2022
Sustained B Cell Depletion in Lupus Nephritis Patients After Treatment with a B Cell Agent Is Associated with Fewer Disease Flares
Background/Purpose: B cell targeting agents (BCA), including belimumab (BEL) and rituximab (RTX), have been used with success in lupus nephritis (LN) patients, though identifying patients…Abstract Number: 0978 • ACR Convergence 2022
Belimumab After Rituximab Targets IgA2 Anti-dsDNA Antibody Production and Shifts Repopulating B-cells Towards an Anergic, Non-pathogenic Phenotype in Systemic Lupus Erythematosus
Background/Purpose: The results from the BEAT-lupus trial comparing belimumab vs placebo, both after rituximab in systemic lupus erythematosus (SLE) have recently been reported (1). We…Abstract Number: 2082 • ACR Convergence 2022
A Prospective Study on Long-Term Clinical Outcomes of Patients with Lupus Nephritis Treated with an Intensified B-Cell Depletion Protocol Without Maintenance Therapy
Background/Purpose: We aimed to investigate the safety and efficacy of an intensified B-cell depletion induction therapy (IBCDT) without immunosuppressive maintenance regimen compared with standard of…Abstract Number: 0990 • ACR Convergence 2022
KPG-818, a Novel Cereblon (CRBN) Modulator, in Patients with SLE: Results of a Phase Ib Multiple Ascending Dose Study
Background/Purpose: KPG-818 is a novel CRL4-CRBN E3 ubiquitin ligase modulator that binds to CRBN with high affinity and leads to rapid and effective degradation of…Abstract Number: 1080 • ACR Convergence 2022
Performance of Risk Prediction Models for Relapse and Severe Infection at the End of 18-month Rituximab Maintenance Therapy in ANCA-associated Vasculitides: Data from the MAINRITSAN Trials
Background/Purpose: Long-term follow-up analysis of the three MAINRITSAN trials confirmed the efficacy of rituximab (RTX) in preventing relapses in ANCA-associated vasculitis (AAV), especially RTX administration…Abstract Number: 1083 • ACR Convergence 2022
Treatment of ANCA-associated Vasculitis with Extreme Impairment of Renal Function: A Case-Control Study Comparing an Intensive B Cell Depletion Regimen with the Standard of Care Using Oral Cyclophosphamide
Background/Purpose: Rituximab (RTX), an anti-CD20 monoclonal antibody, has shown to be an effective induction treatment for small-vessel vasculitis associated with antineutrophil cytoplasm antibodies (AAV) in…Abstract Number: 1084 • ACR Convergence 2022
Rituximab versus Cyclophosphamide for Induction Therapy in Granulomatosis with Polyangiitis: A Target Trial Emulation Study
Background/Purpose: Randomized controlled trials showed rituximab (RTX)'s non-inferiority to cyclophosphamide (CYC) for induction therapy of ANCA-associated vasculitis and neither treatment was favoured in granulomatosis with…Abstract Number: 0008 • ACR Convergence 2022
CD11c+ T-Bet+ B Cells Traffic to Human Bone Marrow
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: 1374 • ACR Convergence 2022
Real-World Effectiveness and Steroid Sparing Effect of Belimumab in Pediatric Lupus: A Single Center Retrospective Study
Background/Purpose: Belimumab is the only targeted therapy approved for pediatric systemic lupus erythematosus (pSLE), although use remains limited in children. While clinical trials and studies…Abstract Number: 0009 • ACR Convergence 2022
Pharmacokinetics, Receptor Occupancy, and Pharmacodynamics of Obexelimab Following Intravenous Administration in Adult Healthy Volunteers and in Patients with Rheumatoid Arthritis
Background/Purpose: Obexelimab is a novel bifunctional antibody that inhibits B-cell, CD19 expressing plasma cell, and plasmablast activity and is expected to provide clinical benefit across…Abstract Number: 1428 • ACR Convergence 2022
Molecular and Clinical Profiling of Rheumatoid Arthritis Patients Predicts the Response to Rituximab
Background/Purpose: Rheumatoid arthritis (RA) is one of the most prevalent rheumatic diseases, mainly characterized by chronically painful, swollen joints that can severely impair physical function…Abstract Number: 0045 • ACR Convergence 2022
Rheumatoid Arthritis Patient-derived Anti-citrullinated Protein Antibodies (ACPAs) Ameliorate Joint Inflammation in Early Collagen-antibody Induced Arthritis (CAIA)
Background/Purpose: ACPAs are present in two-thirds of patients with rheumatoid arthritis (RA) and are associated with higher risks for severe bone erosions. The pathogenic role…
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