p16(INK4a) -mediated suppression of telomerase in normal and malignant human breast cells.
p16(INK4a) -mediated suppression of telomerase in normal and malignant human breast cells.
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DOI:
10.1111/j.1474-9726.2010.00599.x
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发表时间:
2010-10
期刊:
影响因子:
7.8
通讯作者:
Yaswen P
中科院分区:
文献类型:
--
作者:
Bazarov AV;Van Sluis M;Hines WC;Bassett E;Beliveau A;Campeau E;Mukhopadhyay R;Lee WJ;Melodyev S;Zaslavsky Y;Lee L;Rodier F;Chicas A;Lowe SW;Benhattar J;Ren B;Campisi J;Yaswen P
The cyclin-dependent kinase inhibitor p16INK4a (CDKN2A) is an important tumor-suppressor gene frequently inactivated in human tumors. p16 suppresses the development of cancer by triggering an irreversible arrest of cell proliferation termed cellular senescence. Here, we describe another anti-oncogenic function of p16 in addition to its ability to halt cell cycle progression. We show that transient expression of p16 stably represses the hTERT gene, encoding the catalytic subunit of telomerase, in both normal and malignant breast epithelial cells. Short-term p16 expression increases the amount of histone H3 trimethylated on lysine 27 (H3K27) bound to the hTERT promoter, resulting in transcriptional silencing, likely mediated by polycomb complexes. Our results indicate that transient p16 exposure may prevent malignant progression in dividing cells by irreversible repression of genes, such as hTERT, whose activity is necessary for extensive self-renewal.
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影响因子:
64.8
作者:
Molofsky, Anna V.;Slutsky, Shalom G.;Morrison, Sean J.
通讯作者:
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