| Literature DB >> 22560223 |
Stacey Robida-Stubbs1, Kira Glover-Cutter, Dudley W Lamming, Masaki Mizunuma, Sri Devi Narasimhan, Elke Neumann-Haefelin, David M Sabatini, T Keith Blackwell.
Abstract
The TOR kinase, which is present in the functionally distinct complexes TORC1 and TORC2, is essential for growth but associated with disease and aging. Elucidation of how TOR influences life span will identify mechanisms of fundamental importance in aging and TOR functions. Here we show that when TORC1 is inhibited genetically in C. elegans, SKN-1/Nrf, and DAF-16/FoxO activate protective genes, and increase stress resistance and longevity. SKN-1 also upregulates TORC1 pathway gene expression in a feedback loop. Rapamycin triggers a similar protective response in C. elegans and mice, but increases worm life span dependent upon SKN-1 and not DAF-16, apparently by interfering with TORC2 along with TORC1. TORC1, TORC2, and insulin/IGF-1-like signaling regulate SKN-1 activity through different mechanisms. We conclude that modulation of SKN-1/Nrf and DAF-16/FoxO may be generally important in the effects of TOR signaling in vivo and that these transcription factors mediate an opposing relationship between growth signals and longevity.Entities:
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Year: 2012 PMID： 22560223 PMCID： PMC3348514 DOI： 10.1016/j.cmet.2012.04.007
Source DB: PubMed Journal: Cell Metab ISSN： 1550-4131 Impact factor: 27.287