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  Sestrin is a key regulator of stem cell function and lifespan in response to dietary amino acids

Lu, J., Temp, U., Müller-Hartmann, A., Esser, J., Grönke, S., & Partridge, L. (2021). Sestrin is a key regulator of stem cell function and lifespan in response to dietary amino acids. Nature Aging, 1(1), 60-72. doi:10.1038/s43587-020-00001-7.

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Lu, J.1, Author           
Temp, U.1, Author           
Müller-Hartmann, A.1, Author           
Esser, J.1, Author           
Grönke, S.1, Author           
Partridge, L.1, Author           
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1Department Partridge - Biological Mechanisms of Ageing, Max Planck Institute for Biology of Ageing, Max Planck Society, ou_1942287              

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 Abstract: Dietary restriction (DR) promotes healthy aging in diverse species. Essential amino acids play a key role, but the molecular mechanisms are unknown. The evolutionarily conserved Sestrin protein, an inhibitor of activity of the target of rapamycin complex 1 (TORC1), has recently been discovered as a sensor of amino acids in vitro. Here, we show that Sestrin null mutant flies have a blunted response of lifespan to DR. A mutant Sestrin fly line, with blocked amino acid binding and TORC1 activation, showed delayed development, reduced fecundity, extended lifespan and protection against lifespan-shortening, high-protein diets. Sestrin mediated reduced intestinal stem cell activity and gut cell turnover from DR, and stem cell proliferation in response to dietary amino acids, by regulating the TOR pathway and autophagy. Sestrin expression in intestinal stem cells was sufficient to maintain gut homeostasis and extend lifespan. Sestrin is thus a molecular link between dietary amino acids, stem cell function and longevity.

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 Dates: 2021-01-012021
 Publication Status: Issued
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 Identifiers: DOI: 10.1038/s43587-020-00001-7
ISSN: 2662-8465
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Title: Nature Aging
Source Genre: Journal
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Pages: - Volume / Issue: 1 (1) Sequence Number: - Start / End Page: 60 - 72 Identifier: -