Mechanisms of life span extension by rapamycin in the fruit fly Drosophila melanogaster.

Mechanisms of life span extension by rapamycin in the fruit fly Drosophila melanogaster.
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DOI:
10.1016/j.cmet.2009.11.010
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发表时间:
2010-01
期刊:
影响因子:
29
通讯作者:
Partridge L
Partridge L
中科院分区:
生物学1区
文献类型:
--
作者:
Bjedov I;Toivonen JM;Kerr F;Slack C;Jacobson J;Foley A;Partridge L

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The target of rapamycin (TOR) pathway is a major nutrient-sensing pathway that, when genetically downregulated, increases life span in evolutionarily diverse organisms including mammals. The central component of this pathway, TOR kinase, is the target of the inhibitory drug rapamycin, a highly specific and well-described drug approved for human use. We show here that feeding rapamycin to adult Drosophila produces the life span extension seen in some TOR mutants. Increase in life span by rapamycin was associated with increased resistance to both starvation and paraquat. Analysis of the underlying mechanisms revealed that rapamycin increased longevity specifically through the TORC1 branch of the TOR pathway, through alterations to both autophagy and translation. Rapamycin could increase life span of weak insulin/Igf signaling (IIS) pathway mutants and of flies with life span maximized by dietary restriction, indicating additional mechanisms. ► Rapamycin, a drug that inhibits TOR pathway, improves longevity in Drosophila ► Rapamycin longevity effects are mediated through the TOR pathway ► Life span extension by rapamycin is through translation changes and autophagy ► Rapamycin extends life span beyond dietary restriction and mild IIS mutations
卡路里不能通过果蝇饮食限制来解释寿命的延长。
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