A 52-Week Phase 3 Study Comparing Rilzabrutinib to Placebo in Adults With Active IgG4-related Disease to Assess Safety and Effectiveness

What this Trial Is About

Researchers are conducting a Phase 3, randomized, double-blind, placebo-controlled study to evaluate the efficacy and safety of rilzabrutinib in adults with active Immunoglobulin G4-related disease IgG4-RD. The study aims to measure the time to the first adjudicated disease flare and assess other important outcomes such as flare-free rates, disease activity control, glucocorticoid use, and safety parameters including adverse events, laboratory tests, and electrocardiograms ECG. Participants will be assigned to one of two groups one receiving rilzabrutinib tablets and the other receiving placebo tablets, both administered orally. The treatment period lasts 52 weeks in a double-blind manner, preceded by a 4 to 6 week screening period. After treatment, there is a 2-week follow-up, with an optional open-label extension lasting up to 108 weeks. The study includes a total of 16 visits during the main period and up to 9 additional visits during the optional extension. During their participation, adults diagnosed with IgG4-RD will undergo repeated imaging procedures such as CT, MRI, PET, or ultrasound to assess disease status. Researchers will monitor disease flares, remission status, glucocorticoid dosage, clinical activity scores, laboratory values, vital signs, and ECG results. Safety monitoring continues up to week 160 to capture treatment-emergent adverse events. Overall, participation lasts up to 60 weeks, with possible extension for those continuing in the optional phase.

A 52-week Study of Rilzabrutinib Efficacy and Safety Compared to Placebo in Adults Diagnosed With IgG4-related Disease