2x105 purified peritoneal CD8+ T cells from PBS, vvDD or vvDD-IL15/Rα treated mice were given IP in conjunction with stimulatory doses of human IL-2 (50,000 IU) to 7-day peritoneal MC38-luc tumor-bearing mice after a preparatory regimen of sublethal whole-body irradiation (5Gy). This evidence concerns the gene CD8A and neoplasm.