Figure 8. Flow cytometry of CAR-T cell apoptosis. (A) CAR-T cell apoptosis; (B) Data statistics of number of apoptotic CAR-T cells. (WT + lymphoma cell + CAR-T group vs. KO + lymphoma cell + CAR-T group; WT + lymphoma cell + CAR-T + PD-L1 neutralizing antibody group vs. KO + lymphoma cell + CAR-T + PD-L1 neutralizing antibody group; **P < 0.01, nsP > 0.05; N = 3).