CAR-T cell therapy for treatment of acute myeloid leukemia, advances and outcomes

Despite recent U.S. FDA approval of multiple therapies for patients with acute myeloid leukemia (AML), clinical outcomes for those patients continue to remain poor. There are very few effective immunotherapeutic modalities such as allogeneic stem cell transplant, SCT, for AML, and this is, in part, due to a lack of known antigens which are unique to AML and not present on vital normal hematopoietic precursors. Additionally, AML is supported by a hostile marrow TME that has a notable role in dampening T cell effector function 1-4. MDSCs and Tregs play a pivotal role in AML microenvironment immune hostility towards endogenous T cells as well as adoptively transferred T cells (ACT). There are many clinical trials that are designed to test the feasibility and efficacy of ACT including Chimeric Antigen Receptor T cell therapies (CAR T cell) in AML, yet none is FDA approved for this fatal disease. In this review, we dissect these trials, their contribution to this therapeutic direction and their success.