BMAL1-dependent regulation of the mTOR signaling pathway delays aging.

BMAL1-dependent regulation of the mTOR signaling pathway delays aging.
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DOI:
10.18632/aging.100633
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发表时间:
2014-01
期刊:
Aging
影响因子:
--
通讯作者:
Kondratov RV
Kondratov RV
中科院分区:
其他
文献类型:
--
作者:
Khapre RV;Kondratova AA;Patel S;Dubrovsky Y;Wrobel M;Antoch MP;Kondratov RV

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生物钟是一种内部计时系统,与衰老的控制有关,但调节的分子机制尚不清楚。BMAL 1是一种转录因子,也是生物钟的核心组成部分; BMAL 1缺乏与过早衰老和寿命缩短有关。在这里,我们报告,活性的哺乳动物靶雷帕霉素复合物1(mTORC 1)增加后BMAL 1缺陷在体内和细胞培养。增加mTOR信号与加速衰老有关;根据这一点,用mTORC 1抑制剂雷帕霉素治疗使Bmal 1 −/−小鼠的寿命延长了50%。我们的数据表明,BMAL 1是mTORC 1信号的负调节因子。我们认为,生物钟通过BMAL 1依赖性机制控制mTOR通路的活性,这种调节对于控制衰老和代谢很重要。
The circadian clock, an internal time-keeping system, has been linked with control of aging, but molecular mechanisms of regulation are not known. BMAL1 is a transcriptional factor and core component of the circadian clock; BMAL1 deficiency is associated with premature aging and reduced lifespan. Here we report that activity of mammalian Target of Rapamycin Complex 1 (mTORC1) is increased upon BMAL1 deficiency both in vivo and in cell culture. Increased mTOR signaling is associated with accelerated aging; in accordance with that, treatment with the mTORC1 inhibitor rapamycin increased lifespan of Bmal1−/− mice by 50%. Our data suggest that BMAL1 is a negative regulator of mTORC1 signaling. We propose that the circadian clock controls the activity of the mTOR pathway through BMAL1-dependent mechanisms and this regulation is important for control of aging and metabolism.
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发表时间: 2010-03-15
期刊: Cell cycle (Georgetown, Tex.)
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