This is a multicenter, open-label, dose-escalation Phase 1 study of PRT1419, a MCL1 inhibitor, evaluating patients in two cohorts as part of a 28-day treatment cycle in adult patients with multiple myeloma (MM), non-Hodgkin's lymphoma (NHL), acute myeloid leukemia (AML), chronic myelomonocytic leukemia (CMML), high-risk myelodysplastic syndrome (MDS) or MDS/myeloproliferative neoplasm (MPN) overlap syndrome. Cohort A will evaluate PRT1419 administered as monotherapy in patients with either AML, CMML and/or high-risk MDS or MDS/MPN overlap. Cohort B will evaluate PRT1419 administered as monotherapy in patients with NHL or MM. The study will employ a 3+3 dose escalation design. The dose may be escalated until a dose limiting toxicity is identified.
This is a Phase 1 dose-escalation study of PRT1419, a myeloid cell leukemia 1 (MCL1) inhibitor, in patients with relapsed/refractory hematologic malignancies. The purpose of this study is to define the dosing schedule, maximally tolerated dose and/or estimate the optimal biological dose to be used in subsequent development of PRT1419.