PTBP1 and bladder transitional cell carcinoma: Studies had proved that overexpression of MAFG-AS1 can upregulate the expression of polypyrimidine tract-binding protein 1 (PTBP1) through promoting its stability mediated by bound HuR, thus promoting the progression of bladder urothelial carcinoma (BUC) via regulation of the HUR/PTBP1 axis [16].