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• W1968998321 abstract "Abstract Obesity and insulin resistance are rapidly expanding public health problems. These disturbances are related to many diseases, including heart pathology. Acting through the Akt/mTOR pathway, insulin has numerous and important physiological functions, such as the induction of growth and survival of many cell types and cardiac hypertrophy. However, obesity and insulin resistance can alter mTOR/p70S6k. Exercise training is known to induce this pathway, but never in the heart of diet‐induced obesity subjects. To evaluate the effect of exercise training on mTOR/p70S6k in the heart of obese Wistar rats, we analyzed the effects of 12 weeks of swimming on obese rats, induced by a high‐fat diet. Exercise training reduced epididymal fat, fasting serum insulin and plasma glucose disappearance. Western blot analyses showed that exercise training increased the ability of insulin to phosphorylate intracellular molecules such as Akt (2.3‐fold) and Foxo1 (1.7‐fold). Moreover, reduced activities and expressions of proteins, induced by the high‐fat diet in rats, such as phospho‐JNK (1.9‐fold), NF‐kB (1.6‐fold) and PTP‐1B (1.5‐fold), were observed. Finally, exercise training increased the activities of the transduction pathways of insulin‐dependent protein synthesis, as shown by increases in Raptor phosphorylation (1.7‐fold), p70S6k phosphorylation (1.9‐fold), and 4E‐BP1 phosphorylation (1.4‐fold) and a reduction in atrogin‐1 expression (2.1‐fold). Results demonstrate a pivotal regulatory role of exercise training on the Akt/mTOR pathway, in turn, promoting protein synthesis and antagonizing protein degradation. J. Cell. Physiol. 226: 666–674, 2011. © 2010 Wiley‐Liss, Inc." @default.
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• W1968998321 date "2010-12-28" @default.
• W1968998321 modified "2023-10-16" @default.
• W1968998321 title "Exercise training reduces insulin resistance and upregulates the mTOR/p70S6k pathway in cardiac muscle of diet-induced obesity rats" @default.
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• W1968998321 doi "https://doi.org/10.1002/jcp.22387" @default.
• W1968998321 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/20717955" @default.
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