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- W2108585907 abstract "Paraquat (PQ) is a well-known herbicide that exerts its effects by elevating intracellular levels of superoxide. It has been previously demonstrated that oxidative and nitrosative stress participate to PQ-induced cell death. Here, we document that PQ increases the levels of nitric oxide (NO) in rat mesencephalic cells and causes nuclear translocation of glyceraldehyde-3-phosphate dehydrogenase (GAPDH) to activate the NO/GAPDH/Siah cell death cascade. PQ exposure increases expression of the p300/CREB-binding protein (p300/CBP) and phosphorylation of p53 at Ser 15, which stimulates p53-dependent transactivation through increased binding with p300. Although this cascade could be inhibited by preincubation with the monoamine oxidase B inhibitor deprenyl, cell death was not prevented. Pretreatment of cells with the neuronal nitric oxide synthase inhibitor 7-nitroindazole efficiently prevented the activation of the GAPDH/NO/Siah cell death cascade, thereby protecting cells against PQ-induced toxicity. The results suggest that PQ induces this novel cell death cascade in rat mesencephalic cells, but inhibition of the pathway does not impede cell death because of an oxidative burst generated by the pesticide." @default.
- W2108585907 created "2016-06-24" @default.
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- W2108585907 date "2010-05-17" @default.
- W2108585907 modified "2023-10-02" @default.
- W2108585907 title "Paraquat Exposure Induces Nuclear Translocation of Glyceraldehyde-3-Phosphate Dehydrogenase (GAPDH) and the Activation of the Nitric Oxide-GAPDH-Siah Cell Death Cascade" @default.
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- W2108585907 doi "https://doi.org/10.1093/toxsci/kfq146" @default.
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