Parental A20 WT and PD-L1-deficient tumor cells were co-injected in equal numbers (5 × 106 of each cell type) in isotype control-treated, NK cell-depleted, or CD8 T-cell-depleted F1 recipient mice, and tumor survival was assessed 6 days after injection (Figures 5B, C). The gene discussed is CD8A; the disease is neoplasm.