We further found that the overexpression of BCLET‐long or BCLET‐short significantly increased the expression level and splicing ratio of MSANTD2‐004, and low expression of MSANTD2‐004 and a low splicing ratio were observed with decreasing expression of BCLET in bladder cancer cells (Figure 4G,H and Figure S6). The gene discussed is MSANTD2-AS1; the disease is urinary bladder carcinoma.