In order to further research how Anti-MICB-CAR-NK promotes tumor cell apoptosis, treat PANC-1 tumor cells for 24 h with NC-NK cells, non-transduced NK (NT-NK), NT-NK supernatant + NK cells, Anti-MICB-CAR-NK supernatant + NK cells, and Anti-MICB-CAR-NK cells (Figure 2I and Figure S5). The gene discussed is MICB; the disease is neoplasm.