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Branched-chain amino acids impact health and lifespan indirectly via amino acid balance and appetite control
Open accessAbstract
Elevated branched-chain amino acids (BCAAs) are associated with obesity and insulin resistance. How long-term dietary BCAAs impact late-life health and lifespan is unknown. Here, we show that when dietary BCAAs are varied against a fixed, isocaloric macronutrient background, long-term exposure to high BCAA diets leads to hyperphagia, obesity and reduced lifespan. These effects are not due to elevated BCAA per se or hepatic mammalian target of rapamycin activation, but instead are due to a shift in the relative quantity of dietary BCAAs and other amino acids, notably tryptophan and threonine. Increasing the ratio of BCAAs to these amino acids results in hyperphagia and is associated with central serotonin depletion. Preventing hyperphagia by calorie restriction or pair-feeding averts the health costs of a high-BCAA diet. Our data highlight a role for amino acid quality in energy balance and show that health costs of chronic high BCAA intakes need not be due to intrinsic toxicity but instead are a consequence of hyperphagia driven by amino acid imbalance. Dietary protein influences metabolic health and ageing. Here Solon-Biet et al. show that, rather than having a direct toxic effect, dietary branched-chain amino acids (BCAAs) appear to induce hyperphagia, owing to an imbalance between BCAAs and other amino acids, which reduces lifespan as a consequence of obesity.
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Metadata
- Authors
- Solon-Biet, S. M., Cogger, V. C., Pulpitel, T., Wahl, D., Clark, X., Bagley, E. E., Gregoriou, G. C., Senior, A. M., Wang, Q.-P., Brandon, A. E., Perks, R., O’Sullivan, J., Koay, Y. C., Bell-Anderson, K., Kebede, M., Yau, B., Atkinson, C., Svineng, G., Dodgson, T., Wali, J. A., Piper, M. D. W., Juricic, P., Partridge, L., Rose, A. J., Raubenheimer, D., Cooney, G. J., Le Couteur, D. G., & Simpson, S. J.
- Venue
- Nature Metabolism
- Published
- 2019-04-29
- Volume
- 1
- Issue
- 5
- Pages
- 532-545
- ISSN
- 2522-5812 (ISSN-L)
- OpenAlex
- W2941943504
- Cited by
- 332
- References
- 13
- FWCI
- 10.68
- Type
- journal article
- Language
- en
- Open access
- green
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