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- W2617212687 abstract "Scope In recent years, several studies reported the role of eIF4E-binding proteins (4E-BPs) on the development of diet-induced obesity and insulin resistance. Our aim was to investigate the effect of 4E-BP protein deletion on lipid accumulation and metabolism in skeletal muscle in response to a high-fat diet induced obesity in 4E-BP1/2 DKO mice. Methods and results Diet-induced obesity engendered increased ectopic accumulation of lipotoxic species in skeletal muscle of 4E-BP1 and 4E-BP2 double knockout mice (4E-BP1/2 DKO), namely diacylglycerols and ceramides. Increased lipid accumulation was associated with alterations in the expression of genes involved in fatty acid transport (FATP, CD36), diacylglycerol/triacylglycerol biosynthesis (GPAT1, AGPAT1, DGAT1), and β-oxidation (CPT1b, MCAD). Diet-induced obesity resulted in increased lean mass and muscle in 4E-BP1/2 DKO mice despite the development of a more severe systemic insulin resistance. Since increased expression of genes of several proteolytic systems (MuRF1, atrogin/MAFbx, and cathepsin-l) in 4EBP1/2 DKO skeletal muscle was reported, the increase of skeletal muscle mass in 4E-BP1/2 DKO mice suggests that ablation of 4E-BPs compensate with activation of muscle anabolism. Conclusions These findings indicate that 4E-BP proteins may prevent excess lipid accumulation in skeletal muscle and suggest that 4E-BPs are key regulators of muscle homeostasis regardless of insulin sensitivity." @default.
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- W2617212687 date "2017-07-03" @default.
- W2617212687 modified "2023-10-03" @default.
- W2617212687 title "Muscle metabolic alterations induced by genetic ablation of 4E-BP1 and 4E-BP2 in response to diet-induced obesity" @default.
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- W2617212687 doi "https://doi.org/10.1002/mnfr.201700128" @default.
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