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Chimeric antigen receptor (CAR) T cell therapies hold great potential for treating cancers, and new CARs that can target multiple tumor types and have the potential to target non-hematological malignancies are needed. In this study, the tumor recognition ability of a natural killer cell-activating receptor, DNAM-1 was harnessed to design CARs that target multiple tumor types. DNAM-1 ligands, PVR and nectin-2, are expressed on primary human leukemia, myeloma, ovarian cancer, melanoma, neuroblastoma, and Ewing sarcoma. DNAM-1 CARs exhibit high tumor cell cytotoxicity but low IFN-γ secretion in vitro. In contrast to other CAR designs, co-stimulatory domains did not improve the expression and function of DNAM-1 CARs. A DNAM-1/CD3zeta CAR reduced tumor burden in a murine melanoma model in vivo. In conclusion, DNAM-1-based CARs may have the potential to treat PVR and nectin-2 expressing hematological and solid tumors.

DNAM-1-based chimeric antigen receptors enhance T cell effector function and exhibit in vivo efficacy against melanoma