Su et al. found that circ_RIP2 can sponge miR-1305 to elevate transforming growth factor beta 2 (TGFB2) in bladder cancer in addition to inducing EMT via the TGFB2/SMAD family member 3 (SMAD3) pathway [133]. This evidence concerns the gene TGFB2 and urinary bladder cancer.