Since decorin blocked the activity of TGF-β, our data also identified that OAV-DEC significantly inhibited TGF-β expression on renal cancer cells in tumor tissues from OAV-DEC or OAV-DEC + CAIX-CAR-T treatment (Figures 4D and 4E), which was identical to other research. Here, TGFB1 is linked to renal carcinoma.