Plzf regulates germline progenitor self-renewal by opposing mTORC1.
Plzf regulates germline progenitor self-renewal by opposing mTORC1.
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DOI:
10.1016/j.cell.2010.06.041
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发表时间:
2010-08-06
期刊:
影响因子:
64.5
通讯作者:
Pandolfi PP
中科院分区:
文献类型:
--
作者:
Hobbs RM;Seandel M;Falciatori I;Rafii S;Pandolfi PP
Hyperactivity of mTORC1, a key mediator of cell growth, leads to stem cell depletion although the underlying mechanisms are poorly defined. Using spermatogonial progenitor cells (SPCs) as a model system, we show that mTORC1 impairs stem cell maintenance by a negative feedback from mTORC1 to receptors required to transduce niche-derived signals. We find that SPCs lacking Plzf, a transcription factor essential for SPC maintenance, have enhanced mTORC1 activity. Aberrant mTORC1 activation in Plzf −/− SPCs inhibits their response to GDNF, a growth factor critical for SPC self-renewal, via negative feedback at the level of the GDNF receptor. Plzf opposes mTORC1 activity by inducing expression of the mTORC1 inhibitor Redd1. Thus, we identify the mTORC1-Plzf functional interaction as a critical rheostat for maintenance of the spermatogonial pool, and propose a model whereby negative feedback from mTORC1 to the GDNF receptor balances SPC growth with self-renewal.
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DOI:
10.1083/jcb.200403069
发表时间:
2004-07-19
期刊:
The Journal of cell biology
影响因子:
--
作者:
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2008-09-29
期刊:
The Journal of experimental medicine
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4
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影响因子:
64.8
作者:
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通讯作者:
Pandolfi, Pier Paolo