GAS5 and urinary bladder carcinoma: Studies have confirmed that LncRNAs played an impotent role in tumor cell cytolergy.7, 8, 9 Growth arrest‐specific transcript 5 (GAS5), which located at chromosome 1q25, has an inhibitory effect on tumors.10 In recent years, study showed that GAS5 was underexpressed in bladder cancer and promoted cell proliferation by regulating CDK6.11 However, the role of GAS5 in bladder cancer and related mechanisms is rarely studied.