To begin investigating cell‐based delivery of RANTES/IL‐15 to enhance CAR‐T‐cell migration and proliferation, we first transduced human U87 GBM cells with a replication‐incompetent retroviral vector (RV) encoding human RANTES and IL‐15 (U87RANTES‐IL‐15). This evidence concerns the gene CCL5 and glioblastoma.