Phase 2b Study of IMVT-1402 for Adults With Graves Disease Not Responding to Antithyroid Drugs

What this Trial Is About

Researchers are evaluating the efficacy, safety, and tolerability of IMVT-1402 in adults with Graves disease who remain hyperthyroid despite treatment with antithyroid drugs ATD. The study is a randomized, double-blind, placebo-controlled Phase 2b trial aiming to compare IMVT-1402 against placebo by measuring thyroid hormone levels and ATD dose changes at Week 26. Participants receive either IMVT-1402 or placebo via subcutaneous injections once weekly. Some groups will receive IMVT-1402 for 52 weeks, others IMVT-1402 for 26 weeks followed by placebo for 26 weeks, and one group will receive placebo for 52 weeks. The study evaluates thyroid hormone levels, seronegative status for thyroid receptor antibodies, and sustained euthyroidism at multiple time points up to Week 104. During the trial, participants undergo regular assessments of thyroid hormones T3, FT3, FT4, TSH, antibody levels, and clinical status. Researchers will monitor participants up to two years to assess the proportion achieving normal thyroid function without ATD and maintaining this status over time. Safety and tolerability of IMVT-1402 are also evaluated throughout the study.

A Study to Assess the Efficacy, Safety, and Tolerability of IMVT-1402 as Treatment for Adult Participants With Graves' Disease