A Study to Find the Highest Dose of SNDX-5613 (Revumenib) as a Treatment Option After Hematopoietic Stem Cell Transplant in Children With Acute Lymphoblastic Leukemia, Acute Myeloid Leukemia, and Mixed Phenotype Acute Leukemia

This phase I trial tests the safety, best dose, and effectiveness of revumenib given as maintenance therapy after standard hematopoietic stem cell transplant (HSCT) in patients with acute lymphoblastic leukemia, acute myeloid leukemia, or mixed phenotype acute leukemia. Revumenib binds to a protein called menin, which prevents menin from interacting with another protein called MLL. This results in an inhibition of the proliferation of leukemic cells with certain genetic alterations. Revumenib may inhibit the survival, growth, transformation and proliferation of certain kinds of leukemia cells. It is approved for the treatment of patients with certain types of acute leukemia, but it is not approved for maintenance therapy (treatment that aims to prevent cancer from coming back) after HSCT.