ZEB1 and neoplasm: This study speculates that one of the main reasons why the expression of chTERT in mutant tumor tissues is significantly higher than that in wild-type tumor tissues is that NFAT5, TFAP2A and ZEB1 are actively involved in regulating the expression of chTERT, but their interaction with chTERT and the regulatory mechanism remain to be further elucidated, which also provides new scientific questions and research directions for future generations to further study the mechanism of chTERT in ALV-J-induced tumorigenesis.