Disulfiram in Rheumatoid Arthritis

Study Summary

Rheumatoid arthritis (RA) is a chronic autoimmune disease characterized by persistent joint inflammation and systemic immune activation. Obesity is common among individuals with RA and is associated with increased disease activity, reduced treatment response, and worse functional outcomes. Inflammation in adipose tissue, driven in part by activation of the NLRP3 inflammasome and downstream gasdermin D (GSDMD)-mediated pathways, may contribute to systemic inflammation and RA disease severity. Disulfiram (DSF), an FDA-approved medication for alcohol use disorder, has recently been identified as an inhibitor of GSDMD-mediated inflammatory signaling and pyroptosis. Preclinical studies suggest that DSF reduces inflammasome activation, inflammatory cytokine release, and metabolic dysfunction. This study is a 12-week, randomized, double-blind, placebo-controlled pilot trial designed to evaluate the safety, tolerability, and preliminary efficacy of DSF in overweight and obese adults with active RA despite stable disease-modifying antirheumatic drug (DMARD) therapy. Participants will be randomized to receive either DSF (250 mg daily) or placebo. The primary objective is to assess safety and tolerability. Secondary and exploratory objectives include evaluating the effects of DSF on systemic inflammation, RA disease activity, metabolic parameters, and adipose tissue inflammasome activation. Findings from this study will inform the feasibility and design of larger clinical trials targeting GSDMD-mediated inflammation in RA.

Primary Outcome

Safety and tolerability will be assessed by the frequency, severity, and relatedness of adverse events graded according to Common Terminology Criteria for Adverse Events (CTCAE v5.0), as well as laboratory abnormalities, vital signs, and patient-reported outcomes.

Interventions

• DRUG Placebo
• DRUG Disulfiram (DSF)