DNMT1 and urinary bladder cancer: (A) Schematic diagrams of experimental strategies for evaluating the effect of DNMT inhibition on the growth of bladder cancer under immunocompromised conditions. Nude mice (14 animals in total) orthotopically injected with BBN-induced bladder tumor cells were treated with the vehicle control (seven animals) or 5’-azacitidine (seven animals) for 2 weeks.