Chen Y, Kong QZ. Expression alteration of tankyrase and telomerase in HCC development in rats.
Shijie Huaren Xiaohua Zazhi 2008;
16:2086-2091. [DOI:
10.11569/wcjd.v16.i19.2086]
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Abstract
AIM: To explore the dynamic states of and relationship between tankyrase and telomerase reverse transcriptase (TERT) in hepatocellular carcinoma (HCC) development in rats.
METHODS: SD rats were assigned randomly to control group (n = 42) and model group (n = 42). HCC model was induced by diethyl nitrosoamine (DENA). Twelve rats from both groups were randomly executed at 3, 6, 9, 12, 15, 18, 21 wk for further test. The expression of tankyrase and TERT was detected using Western blot and immunofluorescence analysis, whereas telomerase activity and the expression of Ki-67 were assayed using TRAP and immunohistochemical methods, respectively.
RESULTS: Compared with the low expression level of telomerase and TERT in normal tissue and precancerous lesions, the expression level of tankyrase was significantly increased in inflammatory stage, as well as in hepatocirrhotic stage, especially in HCC stage, in which stage peak values of all these factors were obtained . The expression of tankyrase was positively correlated with telomerase and TERT (r = 0.898, P = 0.038; r = 0.943, P = 0.016), but no relationship was found between tankyrase and Ki-67. However, Ki-67 was positively correlated with telomerase and TERT (r = 0.986, P = 0.002; r = 0.93, P = 0.022).
CONCLUSION: Over-expression of tankyrase might be one of the factors that regulates telomerase function as telomere elongation. Tankyrase, TERT, telomerase and Ki-67 are closely related to HCC progression.
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