CD274 and neoplasm: NOD-scid IL2Rgammanull (NSG) mice bearing parental (A) or PD-L1 knockout (B) UMSCC-1 tumors were treated with PD-L1 CAR haNKs (1 × 107 cells IP, beginning day 14, twice weekly for six doses, n = 10 mice/group) or 1xPBS control and primary tumors were followed for growth. Individual tumor growth curves shown on the left, with summary growth curves shown on the right.