Phase II Study of Afimkibart Injections for Adults With Moderate to Severe Rheumatoid Arthritis Who Have Not Responded to or Cannot Tolerate TNF or JAK Inhibitors

What this Trial Is About

Researchers are evaluating the efficacy and safety of Afimkibart also known as RO7790121 compared with placebo in adults with moderate to severe rheumatoid arthritis RA who have not responded well to or cannot tolerate tumor necrosis factor TNF inhibitors andor Janus kinase JAK inhibitors. This Phase II, double-blind, placebo-controlled study aims to better understand how Afimkibart works for patients with this challenging form of RA. Participants in this study will receive Afimkibart or a matching placebo by subcutaneous injection. The study uses a randomized, parallel design with multiple groups receiving either Afimkibart or placebo. Dosing schedules and injection details are consistent across groups, with treatment effects assessed over a period including baseline, Week 14, and Week 24 timepoints. The study also includes monitoring of drug concentration and immune response markers up to Week 38. During the study, participants will be regularly assessed for changes in RA disease activity using scores such as DAS28-CRP and DAS28-ESR, joint counts, global assessments, pain levels, disability questionnaires, and inflammation markers. Safety is monitored through adverse event tracking and antibody testing. The total study duration includes treatment and follow-up periods lasting up to 38 weeks, allowing researchers to evaluate both short- and longer-term effects of the study drug.

A Study to Assess the Efficacy and Safety of RO7790121 in Participants With Moderate to Severe Rheumatoid Arthritis Who Have Not Responded to or Who Cannot Tolerate Tumor Necrosis Factor (TNF) and/or Janus Kinase (JAK Inhibitors)