The choice between p53-induced senescence and quiescence is determined in part by the mTOR pathway.
The choice between p53-induced senescence and quiescence is determined in part by the mTOR pathway.
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DOI:
10.18632/aging.100160
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发表时间:
2010-06
期刊:
影响因子:
--
通讯作者:
Blagosklonny MV
中科院分区:
文献类型:
--
作者:
Korotchkina LG;Leontieva OV;Bukreeva EI;Demidenko ZN;Gudkov AV;Blagosklonny MV
Transient induction of p53 can cause reversible quiescence and irreversible senescence. Using nutlin-3a (a small molecule that activates p53 without causing DNA damage), we have previously identified cell lines in which nutlin-3a caused quiescence. Importantly, nutlin-3a caused quiescence by actively suppressing the senescence program (while still causing cell cycle arrest). Noteworthy, in these cells nutlin-3a inhibited the mTOR (mammalian Target of Rapamycin) pathway, which is known to be involved in the senescence program. Here we showed that shRNA-mediated knockdown of TSC2, a negative regulator of mTOR, partially converted quiescence into senescence in these nutlin-arrested cells. In accord, in melanoma cell lines and mouse embryo fibroblasts, which easily undergo senescence in response to p53 activation, nutlin-3a failed to inhibit mTOR. In these senescence-prone cells, the mTOR inhibitor rapamycin converted nutlin-3a-induced senescence into quiescence. We conclude that status of the mTOR pathway can determine, at least in part, the choice between senescence and quiescence in p53-arrested cells.
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影响因子:
4.3
作者:
Demidenko, Zoya N.;Blagosklonny, Mikhail V.
通讯作者:
Blagosklonny, Mikhail V.
影响因子:
4.3
作者:
Demidenko, Zoya N.;Shtutman, Michael;Blagosklonny, Mikhail V.
通讯作者:
Blagosklonny, Mikhail V.
影响因子:
5.2
作者:
Biteau, Benoit;Jasper, Heinrich
通讯作者:
Jasper, Heinrich
影响因子:
5.2
作者:
Huang, Baoying;Deo, Dayanand;Vassilev, Lyubomir T.
通讯作者:
Vassilev, Lyubomir T.
影响因子:
5.2
作者:
Huang, Baoying;Vassilev, Lyubomir T.
通讯作者:
Vassilev, Lyubomir T.