For patients diagnosed with urothelial carcinoma of the urinary bladder, upon DDP treatment, DDP‐induced CCAAT/enhancer‐binding protein delta expression activated ABCB1 and ABCC2, and the high expression of ABCB1 and ABCC2 resulted in a decline in the effect of DDP.10 The gene discussed is ABCB1; the disease is bladder transitional cell carcinoma.