As shown in Figure 3B, no tumor control was observed in mice treated with H9 CAR T cells compared with control treatment, while mice that received H9 CAR-IL15 T cells had significantly reduced tumor growth (mean tumor volume on Day 15 post CAR-T injection: 787.1 vs. 1,508.0 mm3, p < 0.01; Figure 3C, TGI: 40.8% vs. −13.5%, n = 5 for H9 CAR-IL15 vs. H9 CAR). This evidence concerns the gene IL15 and neoplasm.