Given the observation that IL23mAb-T2A-PSMA-CAR T cells had a higher population than the rest of CAR T cells in co-culturing experiments, thus we have reason to suspect that IL23 secreted by tumor cells or existed in the micro-environment would stimulate the proliferation of the IL23mAb-T2A-PSMA-CAR T cells and IL23mAb-PSMA-CAR T cells. The gene discussed is IL23A; the disease is neoplasm.