At day 2 post-transfer, Ox/Cy enhanced accumulation of CAR-T cells in tumors excised from KPROR1 mice, and this accumulation was partially CXCR6-dependent, as CXCR6−/− CAR-T cells showed poorer tumor infiltration compared to their wild type counterparts (66). This evidence concerns the gene CXCR6 and neoplasm.