Leptin upregulates telomerase activity and transcription of human telomerase reverse transcriptase in MCF-7 breast cancer cells.

Leptin upregulates telomerase activity and transcription of human telomerase reverse transcriptase in MCF-7 breast cancer cells.
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瘦素上调 MCF-7 乳腺癌细胞中的端粒酶活性和人端粒酶逆转录酶的转录。

DOI:
10.1016/j.bbrc.2010.02.093
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发表时间:
2010-03
期刊:
Biochem Biophys Res Commun. (SCI,ISTP 收录)
影响因子:
--
通讯作者:
Wang J
Wang J
中科院分区:
其他
文献类型:
--
作者:
Wang X;Ren H;Cao X;Yu M;Zhao T;Hao JH;Wang J

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探讨瘦素诱导MCF-7乳腺癌细胞端粒酶活性的机制。我们发现瘦素以剂量依赖的方式激活端粒酶;瘦素在mRNA和蛋白水平上调人端粒酶逆转录酶(hTERT)的表达;阻断信号转导子和转录激活子3(STAT 3)磷酸化显著抵消瘦素诱导的hTERT转录和蛋白表达;染色质免疫沉淀分析显示瘦素增强STAT 3与hTERT启动子的结合。本研究揭示了瘦素对乳腺癌细胞增殖作用的新机制,为肥胖相关乳腺癌的发生提供了新的解释。
The aim was to analyze the mechanism of leptin-induced activity of telomerase in MCF-7 breast cancer cells. We found that leptin activated telomerase in a dose-dependent manner; leptin upregulated the expression of Human Telomerase Reverse Transcriptase (hTERT) at mRNA and protein levels; blockade of signal transducer and activator of transcription 3 (STAT3) phosphorylation significantly counteracted leptin-induced hTERT transcription and protein expression; chromatin immunoprecipitation analysis showed that leptin enhanced the binding of STAT3 to the hTERT promoter. This study uncovers a new mechanism of the proliferative effect of leptin on breast cancer cells and provides a new explanation of obesity-related breast cancer.
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