Phase III Study of Ixazomib-Augmented Conditioning and Post-Transplant Therapy in Relapsed Multiple Myeloma Patients Previously Treated with Stem Cell Transplant

What this Trial Is About

The trial investigates the role of ixazomib in patients with relapsed multiple myeloma who have previously undergone autologous stem cell transplant ASCT. It is a phase III, randomized, controlled, multi-center, open-label study aiming to assess whether adding a proteasome inhibitor to salvage ASCT conditioning improves depth of response and how consolidation and maintenance therapy influence the durability of response. The study also evaluates overall survival, progression-free survival, response rates, minimal residual disease, toxicity, and quality of life. Participants first receive re-induction therapy with 4 to 6 cycles of ixazomib, thalidomide, and dexamethasone ITD, each cycle lasting 28 days. Those achieving at least stable disease are randomly assigned to receive either conventional ASCT using melphalan alone or augmented ASCT combining melphalan with ixazomib. After ASCT, participants with minimal response or better are further randomized to either receive consolidation with 2 cycles of ITD followed by ixazomib maintenance until disease progression or no further treatment. During the study, participants undergo regular assessments including response evaluation 100 days post-ASCT, monitoring of progression-free survival for up to 120 months, and measurement of minimal residual disease at several time points. Safety and toxicity are closely monitored throughout re-induction, post-ASCT, consolidation, and maintenance phases. Quality of life questionnaires are completed at baseline, post-re-induction, post-ASCT, and during follow-up visits up to 24 months. The study plans to register 406 participants, with 284 randomized at the first stage and 248 at the second stage.

The Role of Ixazomib in Autologous Stem Cell Transplant in Relapsed Myeloma - Myeloma XII (ACCoRd)