Adaptive capacity to bacterial diet modulates aging in C. elegans.
Adaptive capacity to bacterial diet modulates aging in C. elegans.
复制标题
对细菌饮食的适应能力调节线虫的衰老。
DOI:
10.1016/j.cmet.2013.12.005
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发表时间:
2014-02-04
期刊:
影响因子:
29
通讯作者:
Curran SP
中科院分区:
文献类型:
--
作者:
Pang S;Curran SP
Diet has a substantial impact on cellular metabolism and physiology. Animals must sense different food sources and utilize distinct strategies to adapt to diverse diets. Here we show that C. elegans lifespan is regulated by their adaptive capacity to different diets, which is controlled by alh-6, a conserved proline metabolism gene. alh-6 mutants age prematurely when fed an E. coli OP50 but not HT115 diet. Remarkably, this diet-dependent aging phenotype is determined by exposure to food during development. Mechanistically, alh-6 mutation triggers diet-induced mitochondrial defects and increased generation of ROS, likely due to accumulation of its substrate 1-pyrroline-5-carboxylate. We also identify that neuromedin U receptor signaling is essential for diet-induced mitochondrial changes and premature aging. Moreover, dietary restriction requires alh-6 to induce longevity. Collectively, our data reveal a novel mechanism that animals employ to cope with potential dietary insults and uncover an unprecedented example of lifespan regulation by dietary adaptation.
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