Noboribetsu, Japan

A Randomized, Double-blind 2-arm NEPTUNUS Extension Study to Assess the Long-term Safety and Efficacy of Ianalumab in Patients With Sjogrens Syndrome.

The primary purpose of this 3-year treatment extension study is the continued evaluation of the safety and tolerability of treatment with ianalumab 300 mg monthly or every 3 months. An additional purpose is to explore the long-term efficacy of both dosing regimens of ianalumab 300 mg. Trial Design: This is a multicenter, randomized, double-blind, phase 3 study to assess the long-term safety and tolerability of four treatment regimens of ianalumab in participants with Sjogrens syndrome who have taken part in and completed one of two NEPTUNUS core studies, NEPTUNUS-1 (CVAY736A2301) or NEPTUNUS-2 (CVAY736A2302). There will be no screening period in this trial. From week 48 of the NEPTUNUS core study, participants will be given the opportunity to consent to this extension study. Eligible participants will continue their assigned treatment to receive ianalumab 300 mg either monthly or every 3 months for up to 3 additional years of treatment beyond the 1-year core study period. After the treatment period, all participants will enter a follow-up period to be monitored for at least 20 weeks and then a conditional (if B-cell recovery criteria have not been met) follow-up period. The total post treatment follow-up period is up to 2 years. Study Population: Participants with Sjogrens syndrome who have completed treatment in one of two NEPTUNUS core studies. Study treatment assignment method: Participants randomized to ianalumab 300 mg monthly or every 3 months in one of the NEPTUNUS core studies will continue their assigned treatment. Participants randomized to placebo in the NEPTUNUS core studies will be randomized in a 1:1 ratio to either ianalumab 300 mg monthly or every 3 months. Participants randomized to ianalumab 300 mg every 3 months will receive placebo (a dummy treatment) once monthly between doses. Committees: An independent Data Monitoring Committee (DMC) will be utilized for safety review throughout the study. A steering committee will be formed to ensure overview of the study conduct.