Phase 3b Open-label Rollover Study to Assess Long-term Safety of Luspatercept in Adults Previously in Luspatercept Clinical Trials

What this Trial Is About

This research aims to evaluate the long-term safety of luspatercept in participants who have previously taken part in other luspatercept clinical trials for conditions such as Myelodysplastic Syndromes MDS, Beta-thalassemia, and Myeloproliferative Neoplasm-associated Myelofibrosis. It is a Phase 3b, open-label, single-arm rollover study designed to continue monitoring participants who tolerated previous luspatercept treatment and may benefit from ongoing therapy, as well as those in post-treatment follow-up phases. Participants transitioning from prior luspatercept studies will enter a Transition Phase defined by an enrollment visit. Those continuing treatment will receive luspatercept injections subcutaneously at the same dose and schedule as their parent trial, administered by study staff at clinical sites. The study includes a Treatment Phase for ongoing luspatercept administration and a Follow-up Phase comprising a 42-day safety follow-up after the last dose and a long-term post-treatment follow-up phase lasting at least 5 years to monitor overall survival and progression to malignancies. Throughout the study, participants will be regularly assessed for adverse events, progression to high-risk MDS or AML, and development of other malignancies or treatment-related masses. Safety parameters are evaluated during the 42-day follow-up, while long-term survival and disease progression are monitored every six months for at least five years. The study will conclude when all participants have completed five years of combined treatment and follow-up.

A Study to Evaluate Long-term Safety in Participants Who Have Participated in Other Luspatercept (ACE-536) Clinical Trials