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Korean Journal of Obstetrics & Gynecology 1999;42(9):1948-1954.
Published online January 1, 2001.
Telomerase Activity in Endometrium According to Menstrual Cycle.
Ho Yeol Lee, Min Whan Koh
Recently, telomerase activity was found in normal physiologically regenerating cells as well as cancer cells or germ cells. Human endometrium is also physiologically regenerating tissues and undergoes regular and dynamic changes during the menstrual cycle. So the authors examined normal human endometrial tissues for telomerase activity according to menstrual cycle. METHOD: In the current study, 66 normal human endometrial tissues were analyzed for telomerase activity by a radioisotope polimerase chain reaction-based telomeric repeat amplification protocol assay. RESULTS: Of 27 proliferative phase endometrial samples, 22(81%) expressed telomerase activity, whereas 10 of 23(43%) secretory phase sample, 2 of 10(10%) postmenopausal sample, 1 of 6(17%) pregnant endometrial sample did(P<0.05). 4 of 27(15%) endometrial samples in the proliferative phase expressed high telomerase activity after 100-fold dilution of extract, whereas 1 of 23(4%) from secretory phase, none of the 10 postmenopausal and 6 pregnant endometrial samples did. The highest activity was observed in late proliferative phase. CONCLUSION: This study indicates that normal endometrium expresses telomerase, the activity of which changes dramatically and regularly during the course of the menstrual cycle.
Key Words: Telomerase activity, Endometrium, Menstrual cycle, Telomerase

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