This is a Phase 3, parallel group, 2-arm, randomized, double blind, placebo-controlled, 52-week treatment study to assess the efficacy and safety of rilzabrutinib as a treatment for adult patients with active IgG4-RD.
The purpose of this study is to measure time to IgG4-RD clinical disease flare, and other relevant efficacy endpoints including flare-free rate, control of IgG4-RD disease activity, use of GC rescue and safety parameters such as treatment-emergent adverse events, clinical laboratory values and electrocardiograms (ECG) in participants aged 18 years and above, diagnosed with IgG4-RD and treated with rilzabrutinib tablets over a 52-week placebo-controlled period.
Study details include:
The study duration will be up to 60 weeks, including a 4 to 6-week screening period, a 52-week double blind treatment period, and 2 weeks of follow up (plus an optional OLE of 108 weeks).
The number of visits will be 16 (plus an optional 9 visits during the OLE).
Participants must have an adjudicated clinical diagnosis of IgG4-RD
Participants meeting Step 1 Entry criteria of 2019 ACR/EULAR classification criteria for IgG4-RD and Total inclusion points are ≥20
Participants with active disease at screening in at least one organ system, excluding lymph nodes, as an IgG4-RD Responder Index total activity score ≥ 2
Participants with history or current involvement of at least 1 organ/site (excluding lymph nodes) affected with IgG4-RD.
Meet any Step 2 Exclusion criteria from the 2019 ACR/EULAR classification criteria for IgG4-RD.
History of retroperitoneal fibrosis, sclerosing mesenteritis, fibrosing mediastinitis, or other overwhelmingly fibrotic expression of IgG4-RD that is the sole disease manifestation.
Active malignancy or history of malignancy within 5 years before Day 1, except completely treated in situ carcinoma of the cervix, completely treated, and resolved nonmetastatic squamous or basal cell carcinoma of the skin.
Known or suspected immunodeficiency, including history of invasive opportunistic infections (eg, histoplasmosis, listeriosis, coccidioidomycosis, pneumocystosis, and aspergillosis) despite infection resolution, or otherwise recurrent infections of abnormal frequency or prolonged duration suggesting an immune compromised status, as judged by the Investigator.