Parsing the life-shortening effects of dietary protein: effects of individual amino acids.
Identifieur interne : 000648 ( Main/Exploration ); précédent : 000647; suivant : 000649Parsing the life-shortening effects of dietary protein: effects of individual amino acids.
Auteurs : Sara Arganda [États-Unis] ; Sofia Bouchebti [France] ; Sepideh Bazazi [France] ; Sophie Le Hesran [France] ; Camille Puga [France] ; Gérard Latil [France] ; Stephen J. Simpson [Australie] ; Audrey Dussutour [France]Source :
- Proceedings. Biological sciences [ 1471-2954 ] ; 2017.
Abstract
High-protein diets shorten lifespan in many organisms. Is it because protein digestion is energetically costly or because the final products (the amino acids) are harmful? To answer this question while circumventing the life-history trade-off between reproduction and longevity, we fed sterile ant workers on diets based on whole proteins or free amino acids. We found that (i) free amino acids shortened lifespan even more than proteins; (ii) the higher the amino acid-to-carbohydrate ratio, the shorter ants lived and the lower their lipid reserves; (iii) for the same amino acid-to-carbohydrate ratio, ants eating free amino acids had more lipid reserves than those eating whole proteins; and (iv) on whole protein diets, ants seem to regulate food intake by prioritizing sugar, while on free amino acid diets, they seem to prioritize amino acids. To test the effect of the amino acid profile, we tested diets containing proportions of each amino acid that matched the ant's exome; surprisingly, longevity was unaffected by this change. We further tested diets with all amino acids under-represented except one, finding that methionine, serine, threonine and phenylalanine are especially harmful. All together, our results show certain amino acids are key elements behind the high-protein diet reduction in lifespan.
DOI: 10.1098/rspb.2016.2052
PubMed: 28053059
Affiliations:
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last="Bouchebti">Sofia Bouchebti</name><affiliation wicri:level="1"><nlm:affiliation>Centre de Recherches sur la Cognition Animale, Centre de Biologie Intégrative, Université de Toulouse, CNRS, UPS, France.</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>Centre de Recherches sur la Cognition Animale, Centre de Biologie Intégrative, Université de Toulouse, CNRS, UPS</wicri:regionArea><wicri:noRegion>UPS</wicri:noRegion><wicri:noRegion>UPS</wicri:noRegion></affiliation></author><author><name sortKey="Bazazi, Sepideh" sort="Bazazi, Sepideh" uniqKey="Bazazi S" first="Sepideh" last="Bazazi">Sepideh Bazazi</name><affiliation wicri:level="1"><nlm:affiliation>Centre de Recherches sur la Cognition Animale, Centre de Biologie Intégrative, Université de Toulouse, CNRS, UPS, France.</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>Centre de Recherches sur la Cognition Animale, Centre de Biologie Intégrative, Université de Toulouse, CNRS, 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first="Stephen J" last="Simpson">Stephen J. Simpson</name><affiliation wicri:level="4"><nlm:affiliation>School of Biological Sciences, The University of Sydney, Sydney, New South Wales 2006, Australia.</nlm:affiliation><country xml:lang="fr">Australie</country><wicri:regionArea>School of Biological Sciences, The University of Sydney, Sydney, New South Wales 2006</wicri:regionArea><orgName type="university">Université de Sydney</orgName><placeName><settlement type="city">Sydney</settlement><region type="état">Nouvelle-Galles du Sud</region></placeName></affiliation></author><author><name sortKey="Dussutour, Audrey" sort="Dussutour, Audrey" uniqKey="Dussutour A" first="Audrey" last="Dussutour">Audrey Dussutour</name><affiliation wicri:level="1"><nlm:affiliation>Centre de Recherches sur la Cognition Animale, Centre de Biologie Intégrative, Université de Toulouse, CNRS, UPS, France.</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>Centre de Recherches sur la Cognition Animale, Centre de Biologie Intégrative, Université de Toulouse, CNRS, UPS</wicri:regionArea><wicri:noRegion>UPS</wicri:noRegion><wicri:noRegion>UPS</wicri:noRegion></affiliation></author></analytic><series><title level="j">Proceedings. Biological sciences</title><idno type="eISSN">1471-2954</idno><imprint><date when="2017" type="published">2017</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">High-protein diets shorten lifespan in many organisms. Is it because protein digestion is energetically costly or because the final products (the amino acids) are harmful? To answer this question while circumventing the life-history trade-off between reproduction and longevity, we fed sterile ant workers on diets based on whole proteins or free amino acids. We found that (i) free amino acids shortened lifespan even more than proteins; (ii) the higher the amino acid-to-carbohydrate ratio, the shorter ants lived and the lower their lipid reserves; (iii) for the same amino acid-to-carbohydrate ratio, ants eating free amino acids had more lipid reserves than those eating whole proteins; and (iv) on whole protein diets, ants seem to regulate food intake by prioritizing sugar, while on free amino acid diets, they seem to prioritize amino acids. To test the effect of the amino acid profile, we tested diets containing proportions of each amino acid that matched the ant's exome; surprisingly, longevity was unaffected by this change. We further tested diets with all amino acids under-represented except one, finding that methionine, serine, threonine and phenylalanine are especially harmful. All together, our results show certain amino acids are key elements behind the high-protein diet reduction in lifespan.</div></front></TEI><affiliations><list><country><li>Australie</li><li>France</li><li>États-Unis</li></country><region><li>Nouvelle-Galles du Sud</li></region><settlement><li>Sydney</li></settlement><orgName><li>Université de Sydney</li></orgName></list><tree><country name="États-Unis"><noRegion><name sortKey="Arganda, Sara" sort="Arganda, Sara" uniqKey="Arganda S" first="Sara" last="Arganda">Sara Arganda</name></noRegion></country><country name="France"><noRegion><name sortKey="Bouchebti, Sofia" sort="Bouchebti, Sofia" uniqKey="Bouchebti S" first="Sofia" last="Bouchebti">Sofia Bouchebti</name></noRegion><name sortKey="Bazazi, Sepideh" sort="Bazazi, Sepideh" uniqKey="Bazazi S" first="Sepideh" last="Bazazi">Sepideh Bazazi</name><name sortKey="Dussutour, Audrey" sort="Dussutour, Audrey" uniqKey="Dussutour A" first="Audrey" last="Dussutour">Audrey Dussutour</name><name sortKey="Latil, Gerard" sort="Latil, Gerard" uniqKey="Latil G" first="Gérard" last="Latil">Gérard Latil</name><name sortKey="Le Hesran, Sophie" sort="Le Hesran, Sophie" uniqKey="Le Hesran S" first="Sophie" last="Le Hesran">Sophie Le Hesran</name><name sortKey="Puga, Camille" sort="Puga, Camille" uniqKey="Puga C" first="Camille" last="Puga">Camille Puga</name></country><country name="Australie"><region name="Nouvelle-Galles du Sud"><name sortKey="Simpson, Stephen J" sort="Simpson, Stephen J" uniqKey="Simpson S" first="Stephen J" last="Simpson">Stephen J. 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