This is a Phase 1b, open-label, multi-center study recruiting patients with R/R AML and MCL.~The study will utilize an Accelerated Titration Design in the lower dose levels followed by a traditional 3+3 dose escalation design at higher dose levels until RP2D is determined. The starting dose will be 40 mg.~All potential study candidates will provide informed consent and will undergo screening procedures before participating in the study. After a screening period of up to 28 days, qualified patients will be enrolled to receive their assigned dose regimen of PEP07 monotherapy.
The goal of this clinical trial is~To assess the safety and tolerability of PEP07 administered orally as a single dose and at escalating dose levels, and, to determine the dose-limiting toxicity (DLT) of study treatment in patients with Acute Myeloid Leukemia (AML) and Mantle Cell Lymphoma (MCL).~To determine the maximum tolerated dose (MTD) and/or recommended Phase 2 dose (RP2D) of PEP07 monotherapy.~Participants will receive PEP07 administered orally once daily (QD) for 2 consecutive days and 5 days off, every week for 4 weeks until disease progression, intolerable toxicity, confirmed pregnancy, death, consent withdrawal, HSCT or other anti-cancer treatment is required, or the Sponsor ends the study, whichever occurs first.