TNFRSF9 and neoplasm: Meanwhile, CAR‐γδ T cells promote the maturation of DCs, enhancing the antigen‐presentation and activation of αβ T cells by DCs.[21] At the same time, in return, DCs can induce the activation and proliferation of CAR‐γδ T cells, enhancing their cytotoxicity and immunomodulatory functions.[66] CAR‐γδ T cells can induce NK cell mediated anti‐tumor cytotoxicity through the action of CD137.[67]