Abstract
Reduced insulin-like signaling extends the life span of Caenorhabditis elegans and Drosophila . Here, we show that, in mice, less insulin receptor substrate–2 (Irs2) signaling throughout the body or just in the brain extended life span up to 18%. At 22 months of age, brain-specific Irs2 knockout mice were overweight, hyperinsulinemic, and glucose intolerant; however, compared with control mice, they were more active and displayed greater glucose oxidation, and during meals they displayed stable superoxide dismutase–2 concentrations in the hypothalamus. Thus, less Irs2 signaling in aging brains can promote healthy metabolism, attenuate meal-induced oxidative stress, and extend the life span of overweight and insulin-resistant mice.
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- We thank R. Leshan K. Martin C. Aubin N. Fujii and V. Petkovana for technical assistance and C. Lee J. Elmquist M. Anderson and H. Feldman for helpful advice. This work was supported by NIH (grants DK55326 and DK38712 to M.F.W.) the Japan Society for the Promotion of Science (A.T.) and the Yamada Science Foundation (A.T.). M.F.W. is an investigator at the Howard Hughes Medical Institute.
Dates
Type | When |
---|---|
Created | 18 years, 1 month ago (July 19, 2007, 4:53 p.m.) |
Deposited | 1 year, 7 months ago (Jan. 10, 2024, 4:56 a.m.) |
Indexed | 4 weeks, 1 day ago (Aug. 7, 2025, 4:58 p.m.) |
Issued | 18 years, 1 month ago (July 20, 2007) |
Published | 18 years, 1 month ago (July 20, 2007) |
Published Print | 18 years, 1 month ago (July 20, 2007) |
@article{Taguchi_2007, title={Brain IRS2 Signaling Coordinates Life Span and Nutrient Homeostasis}, volume={317}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.1142179}, DOI={10.1126/science.1142179}, number={5836}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Taguchi, Akiko and Wartschow, Lynn M. and White, Morris F.}, year={2007}, month=jul, pages={369–372} }