Cellular senescence mediated by p16INK4A-coupled miRNA pathways.
Cellular senescence mediated by p16INK4A-coupled miRNA pathways.
复制标题
DOI:
10.1093/nar/gkt1096
复制
发表时间:
2014-02
影响因子:
14.9
通讯作者:
Bishop CL
中科院分区:
文献类型:
--
作者:
Overhoff MG;Garbe JC;Koh J;Stampfer MR;Beach DH;Bishop CL
p16 is a key regulator of cellular senescence, yet the drivers of this stable state of proliferative arrest are not well understood. Here, we identify 22 senescence-associated microRNAs (SA-miRNAs) in normal human mammary epithelial cells. We show that SA-miRNAs-26b, 181a, 210 and 424 function in concert to directly repress expression of Polycomb group (PcG) proteins CBX7, embryonic ectoderm development (EED), enhancer of zeste homologue 2 (EZH2) and suppressor of zeste 12 homologue (Suz12), thereby activating p16. We demonstrate the existence of a tight positive feedback loop in which SA-miRNAs activate and re-enforce the expression of other SA-miRNA members. In contrast, PcG members restrain senescence by epigenetically repressing the expression of these SA-miRNAs. Importantly, loss of p16 leads to repression of SA-miRNA expression, intimately coupling this effector of senescence to the SA-miRNA/PcG self-regulatory loop. Taken together, our findings illuminate an important regulatory axis that underpins the transition from proliferation to cellular senescence.
登录
查看更多内容
DOI:
10.18632/aging.100371
发表时间:
2011-10
期刊:
Aging
影响因子:
--
作者:
Li X;Khanna A;Li N;Wang E
通讯作者:
Wang E
影响因子:
56.9
作者:
Boehm, M;Slack, F
通讯作者:
Slack, F
影响因子:
11.2
作者:
Garbe JC;Pepin F;Pelissier FA;Sputova K;Fridriksdottir AJ;Guo DE;Villadsen R;Park M;Petersen OW;Borowsky AD;Stampfer MR;Labarge MA
通讯作者:
Labarge MA
DOI:
10.1073/pnas.1112257109
发表时间:
2012-01-24
影响因子:
11.1
作者:
Cervo, Pia Rivetti di Val;Lena, Anna Maria;Melino, Gerry
通讯作者:
Melino, Gerry
影响因子:
3.7
作者:
Bonifacio, Laura N.;Jarstfer, Michael B.
通讯作者:
Jarstfer, Michael B.