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- W2899488296 abstract "Elevated blood free fatty acids (FFAs), as seen in obesity, impair muscle insulin action leading to insulin resistance and Type 2 diabetes mellitus. Serine phosphorylation of the insulin receptor substrate (IRS) is linked to insulin resistance and a number of serine/threonine kinases including JNK, mTOR and p70 S6K have been implicated in this process. Activation of the energy sensor AMP-activated protein kinase (AMPK) increases muscle glucose uptake, and in recent years AMPK has been viewed as an important target to counteract insulin resistance. We reported recently that rosemary extract (RE) increased muscle cell glucose uptake and activated AMPK. However, the effect of RE on FFA-induced muscle insulin resistance has never been examined. In the current study, we investigated the effect of RE in palmitate-induced insulin resistant L6 myotubes. Exposure of myotubes to palmitate reduced the insulin-stimulated glucose uptake, increased serine phosphorylation of IRS-1, and decreased the insulin-stimulated phosphorylation of Akt. Importantly, exposure to RE abolished these effects and the insulin-stimulated glucose uptake was restored. Treatment with palmitate increased the phosphorylation/activation of JNK, mTOR and p70 S6K whereas RE completely abolished these effects. RE increased the phosphorylation of AMPK even in the presence of palmitate. Our data indicate that rosemary extract has the potential to counteract the palmitate-induced muscle cell insulin resistance and further studies are required to explore its antidiabetic properties." @default.
- W2899488296 created "2018-11-09" @default.
- W2899488296 creator A5039182946 @default.
- W2899488296 creator A5084524833 @default.
- W2899488296 date "2018-11-02" @default.
- W2899488296 modified "2023-10-16" @default.
- W2899488296 title "Attenuation of Free Fatty Acid-Induced Muscle Insulin Resistance by Rosemary Extract" @default.
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- W2899488296 doi "https://doi.org/10.3390/nu10111623" @default.
- W2899488296 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6267446" @default.
- W2899488296 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30400151" @default.
- W2899488296 hasPublicationYear "2018" @default.
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