MSLN and gastric cancer: The results showed that the majority of sorted cells were GFP+ CAR MSLN+ double positive cells (Supplementary Figure 5A), and they possess substantial hyaluronidase activity in vitro (Supplementary Figure 5B).To further verify the in vivo efficacy of these T cells, we utilized another gastric cancer mouse model in which 2×106 MKN28 human gastric cancer cells were subcutaneously inoculated with NSI mice.