PD-1-M1-NK Cells in the Treatment of Advanced Gastric or Colorectal Cancer

At dose escalation stage, four dose groups were initially determined: 5×106CAR NK cells/kg, 1×107CARNK cells/kg, 2×107CARNK cells/kg, and 5×107 CARNK cells/kg. Administration cycle: In Cycle 1 (C1), the drug was administered once on days 1, 4, 7, 10 and 13 respectively. A complete cycle was formed by five consecutive administrations. For subjects with stable, partial response or complete response in the tumor assessment at the first time in week 4, the treatment in Cycle 2 will continue subsequently. In Cycle 2, the drug was administered once every two weeks (Q2W: D14±7 days and D28±7 days).