Naveen Pemmaraju, MD, University of Texas MD Anderson Cancer Center, Houston, TX, discusses the design of a Phase I trial (NCT03190278) of allogeneic CAR T-cells in patients with relapsed/refractory (R/R) acute myeloid leukemia (AML). UCART123 is a novel allogeneic CAR T-cell product that targets CD123 on the surface of AML cells and is genetically modified in the TCR alpha constant gene to reduce graft versus host disease (GvHD). Pre-clinical studies have shown promising efficacy and preferential AML blast targeting. The trial will follow a modified toxicity probability interval design to assess the safety, tolerability, and activity of UCART123. To date, dose level 1 has caused no dose-limiting toxicities, and enrollment at a higher dose has begun. This interview took place during the 62nd American Society of Hematology (ASH) Annual Meeting and Exposition, 2020.