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- W2055887504 abstract "Oxidative stress is thought to play a role in the development of insulin resistance. In order to elucidate the molecular effect of oxidative stress on liver insulin signaling, we analyzed the effect of paraquat (1,1-dimethyl-4,4-dipyridynium; PQ)-derived oxidative stress on the expression of insulin-dependent genes and activation of liver insulin signaling pathway. Incubation of primary cultured rat hepatocytes with 2 mM PQ for 6 h impaired the suppressive effect of insulin on insulin-like growth factor-binding protein-1 (IGFBP-1) gene expression, but did not influence glucose-6-phosphatase gene expression. Insulin-dependent phosphorylation or activation of insulin receptor, insulin receptor substrate-1 and -2, phosphatidylinositol 3-kinase, Akt and forkhead in rhabdomyosarcoma were not affected by PQ pre-treatment. In contrast, PQ treatment impaired insulin-dependent phosphorylation of mammalian target of rapamycin (mTOR). These results indicate that PQ-induced oxidative stress impairs insulin-dependent mTOR activation and that this impairment probably causes inhibition of insulin-dependent repression of IGFBP-1 expression." @default.
- W2055887504 created "2016-06-24" @default.
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- W2055887504 date "2010-01-01" @default.
- W2055887504 modified "2023-10-03" @default.
- W2055887504 title "Effect of Paraquat-Induced Oxidative Stress on Insulin Regulation of Insulin-Like Growth Factor-Binding Protein-1 Gene Expression" @default.
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- W2055887504 doi "https://doi.org/10.3164/jcbn.09-97" @default.
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