CAR T cell persistence in cancer.

Chimeric antigen receptor T cell (CAR T) therapies are 'living drugs' in which T cells are genetically engineered to recognize and kill cancer cells. A major barrier to progress for CAR T targeting liquid and solid tumors is the poor persistence of these cells in vivo, which limits therapeutic efficacy. In this review, we summarize the field's current understanding of CAR T persistence, including clinical observations, patient correlatives and multiomics approaches, and emerging cell engineering and manufacturing strategies. We also propose a conceptual framework for CAR T persistence to guide interpretation of clinical data and the design of more potent and efficacious CAR T therapeutics.