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• W2016598258 startingPage "966" @default.
• W2016598258 abstract "Recent evidence has identified substantial overlap between metabolic and oncogenic biochemical pathways, suggesting novel approaches to cancer intervention. For example, cholesterol lowering statins and the antidiabetes medication metformin both act as chemopreventive agents in prostate and other cancers. The natural compound resveratrol has similar properties: increasing insulin sensitivity, suppressing adipogenesis, and inducing apoptotic death of cancer cells in vitro. However, in vivo tumor xenografts acquire resistance to resveratrol by an unknown mechanism, while mouse models of metabolic disorders respond more consistently to the compound. Here we demonstrate that castration-resistant human prostate cancer C4-2 cells are more sensitive to resveratrol-induced apoptosis than isogenic androgen-dependent LNCaP cells. The MEK inhibitor U0126 antagonized resveratrol-induced apoptosis in C4-2 cells, but this effect was not seen with other MEK inhibitors. U0126 was found to inhibit mitochondrial function and shift cells to aerobic glycolysis independently of MEK. Mitochondrial activity of U0126 arose through decomposition, producing both mitochondrial fluorescence and cyanide, a known inhibitor of complex IV. Applying U0126 mitochondrial inhibition to C4-2 cell apoptosis, we tested the possibility that glutamine supplementation of citric acid cycle intermediate α-ketoglutarate may be involved. Suppression of the conversion of glutamate to α-ketoglutarate antagonized resveratrol-induced death in C4-2 cells. A similar effect was also seen by reducing extracellular glutamine concentration in the culture medium, suggesting that resveratrol-induced death is dependent on glutamine metabolism, a process frequently dysregulated in cancer. Further work on resveratrol and metabolism in cancer is warranted to ascertain if the glutamine dependence has clinical implications." @default.
• W2016598258 created "2016-06-24" @default.
• W2016598258 creator A5006714419 @default.
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• W2016598258 creator A5058769593 @default.
• W2016598258 creator A5059046046 @default.
• W2016598258 date "2011-12-01" @default.
• W2016598258 modified "2023-10-16" @default.
• W2016598258 title "A metabolic perturbation by U0126 identifies a role for glutamine in resveratrol-induced cell death" @default.
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• W2016598258 doi "https://doi.org/10.4161/cbt.12.11.18136" @default.
• W2016598258 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3280915" @default.
• W2016598258 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/22108021" @default.
• W2016598258 hasPublicationYear "2011" @default.
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