PML and urinary bladder carcinoma: In this study, by using a dominant negative mutant human telomerase reverse transcriptase (hTERT) vector to inhibit TA in bladder cancer T24 cells, we observed the appearance of long phenotype of telomere length and the ALT-associated PML body (APB) complex after the 27th passage, indicating the occurrence of ALT-like pathway in surviving T24/DN868A cells with telomerase inhibition.