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• W2094651010 abstract "Acetaminophen (APAP) is a widely used analgesic and antipyretic drug and is safe at therapeutic doses but its overdose frequently causes liver injury. In earlier studies, we demonstrated that arjunolic acid (AA) has a protective effect against chemically induced hepatotoxicity. The purpose of this study was to explore whether AA plays any protective role against APAP-induced acute hepatotoxicity and, if so, what molecular pathways it utilizes for the mechanism of its protective action. Exposure of rats to a hepatotoxic dose of acetaminophen (700 mg/kg, ip) altered a number of biomarkers (related to hepatic oxidative stress), increased reactive oxygen species production, reduced cellular adenosine triphosphate level, and induced necrotic cell death. Arjunolic acid pretreatment (80 mg/kg, orally), on the other hand, afforded significant protection against liver injury. Arjunolic acid also prevented acetaminophen-induced hepatic glutathione depletion and APAP metabolite formation although arjunolic acid itself did not affect hepatic glutathione levels. The results suggest that this preventive action of arjunolic acid is due to the metabolic inhibition of specific forms of cytochrome P450 that activate acetaminophen to N-acetyl-p-benzoquinone imine. In addition, administration of arjunolic acid 4 h after acetaminophen intoxication reduced acetaminophen-induced JNK and downstream Bcl-2 and Bcl-xL phosphorylation, thus protecting against mitochondrial permeabilization, loss of mitochondrial membrane potential, and cytochrome c release. In conclusion, the data suggest that arjunolic acid affords protection against acetaminophen-induced hepatotoxicity through inhibition of P450-mediated APAP bioactivation and inhibition of JNK-mediated activation of mitochondrial permeabilization." @default.
• W2094651010 created "2016-06-24" @default.
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• W2094651010 date "2010-02-15" @default.
• W2094651010 modified "2023-10-16" @default.
• W2094651010 title "Arjunolic acid, a triterpenoid saponin, prevents acetaminophen (APAP)-induced liver and hepatocyte injury via the inhibition of APAP bioactivation and JNK-mediated mitochondrial protection" @default.
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• W2094651010 doi "https://doi.org/10.1016/j.freeradbiomed.2009.11.023" @default.
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