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- W2047752953 abstract "Although resveratrol (RES) is implicated in the regulation of insulin sensitivity in rodents, the exact mechanism underlying this effect remains unclear. Therefore, we sought to investigate how RES affects skeletal muscle lipid transportation and lipid oxidation of subsarcolemmal (SS) and intermyofibrillar (IMF) mitochondrial populations in high-fat diet (HFD)–induced insulin resistance (IR) rats. Systemic and skeletal muscle insulin sensitivity together with expressions of several genes related to mitochondrial biogenesis and skeletal muscle lipid transportation was studied in rats fed a normal diet, an HFD, and an HFD with intervention of RES for 8 weeks. Citrate synthase (CS), electron transport chain (ETC) activities, and several enzymes for mitochondrial β-oxidation were assessed in SS and IMF mitochondria from tibialis anterior muscle. The HFD-fed rats exhibited obvious systemic and skeletal muscle IR as well as intramuscular lipid accumulation. SIRT1 activity and expression of genes related to mitochondrial biogenesis were greatly declined, whereas the gene for lipid transportation, FAT/CD36, was upregulated (P < .05). Subsarcolemmal but not IMF mitochondria displayed lower CS, ETC, and β-oxidation activities. By contrast, RES treatment protected rats against diet-induced intramuscular lipid accumulation and IR, increased SIRT1 activity and mitochondrial biogenesis, and reverted the decline in SS mitochondrial CS and ETC activities. Importantly, although expression of FAT/CD36 was increased (11%, P < .05), activities of SS mitochondrial β-oxidation enzymes were largely enhanced (41%∼67%, P < .05). This study suggests that RES ameliorates insulin sensitivity consistent with an improved balance between skeletal muscle lipid transportation and SS mitochondrial β-oxidation in HFD rats." @default.
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- W2047752953 date "2011-11-01" @default.
- W2047752953 modified "2023-10-18" @default.
- W2047752953 title "Resveratrol attenuates high-fat diet–induced insulin resistance by influencing skeletal muscle lipid transport and subsarcolemmal mitochondrial β-oxidation" @default.
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- W2047752953 doi "https://doi.org/10.1016/j.metabol.2011.04.002" @default.
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