Regulation of yeast chronological life span by TORC1 via adaptive mitochondrial ROS signaling.
Regulation of yeast chronological life span by TORC1 via adaptive mitochondrial ROS signaling.
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DOI:
10.1016/j.cmet.2011.03.018
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发表时间:
2011-06-08
期刊:
影响因子:
29
通讯作者:
Shadel GS
中科院分区:
文献类型:
--
作者:
Pan Y;Schroeder EA;Ocampo A;Barrientos A;Shadel GS
Here we show that yeast strains with reduced target of rapamycin (TOR) signaling have greater overall mitochondrial electron transport chain activity during growth that is efficiently coupled to ATP production. This metabolic alteration increases mitochondrial membrane potential and superoxide production that we propose supplies an adaptive signal during growth that extends chronological life span (CLS). In strong support of this concept, uncoupling respiration during growth or over-expressing mitochondrial manganese superoxide dismutase significantly curtails CLS extension in tor1Δ strains, and treatment of wild-type strains with either rapamycin (to inhibit TORC1) or menadione (to generate mitochondrial ROS) during growth is sufficient to extend CLS. Finally, extension of CLS by reduced TORC1/Sch9p-mitochondrial signaling occurs independently of Rim15p and is not a function of changes in media acidification/composition. Considering the conservation of TOR-pathway effects on life span, mitochondrial ROS signaling may be an important mechanism of longevity regulation in higher organisms.
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DOI:
10.18632/aging.100040
发表时间:
2009-04-20
期刊:
Aging
影响因子:
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作者:
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通讯作者:
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影响因子:
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影响因子:
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