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• W2051293806 startingPage "e41584" @default.
• W2051293806 abstract "The mTOR signaling pathway plays a crucial role in the regulation of cell growth, proliferation, survival and in directing immune responses. As the intestinal epithelium displays rapid cell growth and differentiation and is an important immune regulatory organ, we hypothesized that mTOR may play an important role in the protection against intestinal ischemia reperfusion (I/R)-induced injury. To better understand the molecular mechanisms by which the mTOR pathway is altered by intestinal I/R, p70S6K, the major effector of the mTOR pathway, was investigated along with the effects of rapamycin, a specific inhibitor of mTOR and an immunosuppressant agent used clinically in transplant patients. In vitro experiments using an intestinal epithelial cell line and hypoxia/reoxygenation demonstrated that overexpression of p70S6K promoted cell growth and migration, and decreased cell apoptosis. Inhibition of p70S6K by rapamycin reversed these protective effects. In a mouse model of gut I/R, an increase of p70S6K activity was found by 5 min and remained elevated after 6 h of reperfusion. Inhibition of p70S6K by rapamycin worsened gut injury, promoted inflammation, and enhanced intestinal permeability. Importantly, rapamycin treated animals had a significantly increased mortality. These novel results demonstrate a key role of p70S6K in protection against I/R injury in the intestine and suggest a potential danger in using mTOR inhibitors in patients at risk for gut hypoperfusion." @default.
• W2051293806 created "2016-06-24" @default.
• W2051293806 creator A5036766932 @default.
• W2051293806 creator A5071697044 @default.
• W2051293806 date "2012-07-27" @default.
• W2051293806 modified "2023-10-05" @default.
• W2051293806 title "Protective Role of p70S6K in Intestinal Ischemia/Reperfusion Injury in Mice" @default.
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• W2051293806 doi "https://doi.org/10.1371/journal.pone.0041584" @default.
• W2051293806 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3407246" @default.
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