Abstract Number: 2433 • ACR Convergence 2023
Longitudinal Multi-Omics Single Cell Analysis Reveals Abatacept Treatment Shifts Peripheral Lymphocyte Subpopulations in Seropositive RA with Reduction of Mature B Cells and Retention of Transitional and Naive B Cells
Background/Purpose: Biologic agents of diverse molecular mechanisms of action are approved for RA, but we do not have a full understanding of the implications of…Abstract Number: 0728 • ACR Convergence 2023
Systemic Lupus Erythematosus B Lymphocyte Responsiveness to Type I and Type III Interferon Is Determined by Donor IFN Status and B Cell Phenotype
Background/Purpose: Systemic lupus erythematous (SLE) is a heterogenous autoimmune disorder characterized by pathogenic antinuclear antibodies. An interferon (IFN) gene signature and B cell aberrations are…Abstract Number: 1493 • ACR Convergence 2023
Novel BCMA-CD19 Compound CAR-T (cCAR) Targets B Cells and Plasma Cells Achieving Immune Reset and Eliminates All Autoantibodies in Systemic Lupus Erythematosus (SLE) and Lupus Nephritis (LN) Patients Resulting in Long-Term, Medication-Free Remission
Background/Purpose: Evaluate cCAR safety in SLE, LN and autoimmune conditions. Determine whether a single dose eliminates autoantibodies with well tolerated long-term, medication-free remission in open…Abstract Number: 2463 • ACR Convergence 2023
Efficacy and Safety of Car-T-Cell Treatment in Refractory Antisynthetase Syndrome – Data of the First Three Patients
Background/Purpose: Antisynthetase syndrome (ASS) can be very severe affecting the lungs, the skin and the joints next to the muscles. ASS can take a refractory…Abstract Number: 0002 • ACR Convergence 2023
Population Pharmacokinetic and Pharmacodynamic Analyses of Obexelimab in Healthy Volunteers and in Patients with Rheumatoid Arthritis or IgG4-Related Diseases
Background/Purpose: Obexelimab is a novel bifunctional antibody that inhibits B-cells, CD19-expressing plasma cells, and plasmablast activity and has the potential to provide clinical benefits across…Abstract Number: 0729 • ACR Convergence 2023
ROCK1 Orchestrates B-cell Differentiation Under Stress
Background/Purpose: The mechanisms utilized by B cells to execute their differentiation programs when exposed to damaging and stressful environments, which often accompany severe infections and…Abstract Number: 1494 • ACR Convergence 2023
The Effect of Belimumab on Steroid Use in Patients with SLE: Results from a Retrospective Observational Study of Real-World Data from a US Rheumatology Provider Network
Background/Purpose: While oral CS (OCS) are the mainstay of SLE therapy, prolonged use is associated with organ damage and early mortality.1,2 Minimizing OCS use is…Abstract Number: 2487 • ACR Convergence 2023
Phase 2 Safety and Efficacy of Subcutaneous (s.c.) Dose Ianalumab (VAY736; Anti-BAFFR mAb) Administered Monthly over 28 Weeks in Patients with Systemic Lupus Erythematosus (SLE) of Moderate-to-Severe Activity
Background/Purpose: Ianalumab is a novel defucosylated human IgG1 mAb targeting the receptor for B cell Activating Factor belonging to the TNF Family (BAFF-R) providing potent…Abstract Number: 0003 • ACR Convergence 2023
Expanded Extrafollicular B Cells Were Improved by RTX in IgG4-related Disease
Background/Purpose: IgG4-related disease (IgG4-RD) is an immune-mediated disease characterized by fibrotic masses with expansion of IgG4-producing plasma cell in multiple organs such as pancreas, lacrimal…Abstract Number: 0730 • ACR Convergence 2023
NF-κB Signaling Is Critically Important for Functional Responses of ACPA-producing B Cell Clones from Patients with Rheumatoid Arthritis
Background/Purpose: Anti-citrullinated protein antibodies (ACPA) play a role in rheumatoid arthritis (RA) pathogenesis, and their presence is associated with disease severity. Consequently, detailed analysis of…Abstract Number: 1502 • ACR Convergence 2023
Introduction of Belimumab Within Five Years of the Onset of Systemic Lupus Erythematosus (SLE) Contributes to the Better Therapeutic Response; A Multi-center Retrospective Cohort Study
Background/Purpose: Belimumab (BEL), B cell-targeted biologic agent for systemic lupus erythematosus (SLE), is cumulating evidence such as reducing glucocorticoids and preventing the progressionof organ damage.…Abstract Number: 2511 • ACR Convergence 2023
Superior SARS-CoV-2 Antibody Response Achieved in Rituximab-treated Patients When Vaccinated Against COVID-19 Before Compared to After Rituximab Initiation – Guidance for Future Vaccination Strategies
Background/Purpose: Rituximab (RTX) treatment significantly decreases the antibody response to COVID-19 vaccines, raising concerns about its use. However, unlike during the pandemic, most patients initiating…Abstract Number: 0004 • ACR Convergence 2023
CD22 X CD79b Bispecific Ab Potently Inhibits B Cell Activation and Plasmablast Accumulation
Background/Purpose: B cells contribute to the development and progression of autoimmune diseases through multiple mechanisms. Consequently, modulating B cell activation, B cell effector function, and…Abstract Number: 0731 • ACR Convergence 2023
ZEB2 Acts as a Crucial Transcriptional Regulator Governing Age-Associated B Cell Formation and Pathogenicity in Systemic Lupus Erythematosus
Background/Purpose: Age-associated B cells (ABCs) accumulate and contribute to the pathogenesis of systemic autoimmune diseases like lupus. Despite recent insights into the ontogeny and function…Abstract Number: 1511 • ACR Convergence 2023
B-Cell Recovery in a Randomized Controlled Trial of B-Cell Depletion with Obinutuzumab for the Treatment of Proliferative Lupus Nephritis
Background/Purpose: Patients with LN who received obinutuzumab, a humanized type II anti-CD20 monoclonal antibody, with standard-of-care (MMF) immunosuppression (Phase II NOBILITY; NCT02550652; PMID 34615636) showed…
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