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- W2134166670 abstract "β-Hydroxy-β-methylbutyrate (HMB) prevents deleterious muscle responses under pathological conditions, including tumor- and chronic steroid therapy–related muscle losses. Here, we investigated the hypothesis that HMB may modulate the balance between protein synthesis and degradation in the PI3K/Akt-mediated mammalian target of rapamycin (mTOR) and FoxO1/FoxO3a-dependent mechanisms in differentiated C2C12 muscle cells. We also tested the effect of HMB on the expression of MuRF-1 and atrogin-1 in response to the inflammatory stress. β-Hydroxy-β-methylbutyrate up-regulated phosphorylation of Akt and mTOR, and these effects were completely abolished in the presence of PI3K inhibitor LY294002. β-Hydroxy-β-methylbutyrate also up-regulated FoxO1 and FoxO3a phosphorylation, and these changes were inhibited by LY294002. Although, unexpectedly, HMB failed to reduce the expressions of atrophy-related atrogin-1 messenger RNA and the protein response to the proinflammatory cytokines tumor necrosis factor α plus interferon γ, HMB did attenuate the MuRF-1 expression. Thus, HMB appears to restore the balance between intracellular protein synthesis and proteolysis, likely via activation of the PI3K/Akt-dependent mTOR and FoxO1/FoxO3a signaling pathway and the reduction of tumor necrosis factor α/interferon γ–induced MuRF-1 expression, thereby ameliorating aging-related muscle atrophy." @default.
- W2134166670 created "2016-06-24" @default.
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- W2134166670 date "2014-04-01" @default.
- W2134166670 modified "2023-10-14" @default.
- W2134166670 title "β-Hydroxy-β-methylbutyrate facilitates PI3K/Akt-dependent mammalian target of rapamycin and FoxO1/3a phosphorylations and alleviates tumor necrosis factor α/interferon γ–induced MuRF-1 expression in C2C12 cells" @default.
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- W2134166670 doi "https://doi.org/10.1016/j.nutres.2014.02.003" @default.
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