Phase 3 Study of DNTH103 Claseprubart to Treat Adults With Chronic Inflammatory Demyelinating Polyneuropathy CIDP

What this Trial Is About

Researchers are evaluating the effectiveness of claseprubart DNTH103 compared to a placebo in adults with chronic inflammatory demyelinating polyneuropathy CIDP. This Phase 3 study aims to assess treatment outcomes in participants with typical CIDP or certain CIDP variants, focusing on improving disease activity and disability measures. The study consists of several periods Part A includes an open-label phase lasting up to 13 weeks where participants receive an intravenous loading dose of claseprubart followed by subcutaneous injections every two weeks. Part B is a randomized, placebo-controlled, double-blind treatment phase lasting up to 52 weeks for those who respond to treatment in Part A, with participants receiving either claseprubart or placebo subcutaneously every two weeks. Eligible participants may then join an optional open-label extension lasting up to 104 weeks, continuing claseprubart treatment subcutaneously every two weeks, followed by a safety follow-up period of 40 weeks. Participants will undergo regular assessments throughout the study, including evaluations of disease relapse using the Adjusted Inflammatory Neuropathy Cause and Treatment INCAT score, disability scales, grip strength measurements, quality of life, fatigue severity, and antibody levels. Safety monitoring involves tracking adverse events and drug serum concentrations. The total study duration can extend up to approximately 209 weeks, including all treatment and follow-up phases, with careful monitoring of participants neurological stability and treatment responses.

A Study to Evaluate the Efficacy and Safety of DNTH103 in Adults With Chronic Inflammatory Demyelinating Polyneuropathy (CAPTIVATE)