ELAVL1 and leukemia: The present study investigated changes in HuR expression following GTP intake in bladder cancer, based on the findings that HuR expression is positively associated with tumor aggressiveness—including muscle invasion—in bladder cancer patients [21]; GTP inhibits HuR expression in leukemia cells [21]; and HuR regulates the expression of various cancer-related molecules in many types of malignancy [22, 23, 30].