Besides, after co-culture with gastric cancer cell HGC27, the percentage of total CD8+ T cells and CAR+ T cell in CD8+ T cells was not changed significantly in CAR-ss-T (Fig. 1D), suggesting the existence of IL-15/IL-15Rα did not affect the proportion of CD8+ and CD4+ T cells. The gene discussed is IL15RA; the disease is gastric cancer.