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- W2167185931 abstract "Drug-induced liver injury is an important issue for drug development and clinical drug therapy; however, in most cases, it is difficult to predict or prevent these reactions due to a lack of suitable animal models and the unknown mechanisms of action. Phenytoin (DPH) is an anticonvulsant drug that is widely used for the treatment of epilepsy. Some patients who are administered DPH will suffer symptoms of drug-induced liver injury characterized by hepatic necrosis. DPH-induced liver injury occurs in 1 in 1000 or 1 in 10 000 patients. Clinically, 75% of patients who develop liver injury develop a fever and 63% develop a rash. In this study, we established a mouse model for DPH-induced liver injury and analyzed the mechanisms for hepatotoxicity in the presence of immune-related or inflammation-related factors and metabolic activation. Female C57BL/6 mice were administered DPH for 5 days in combination with L-buthionine-S,R-sulfoximine. Then, the plasma alanine aminotransferase (ALT) levels were increased, hepatic lesions were observed during the histological evaluations, the hepatic glutathione levels were significantly reduced, and the oxidative stress marker levels were significantly increased. The inhibition of cytochrome P450-dependent oxidative metabolism significantly suppressed the elevated plasma ALT levels and depleted hepatic glutathione. Among the innate immune factors, the hepatic mRNA levels of NACHT, LRR, pyrin domain-containing protein 3, interleukin-1β, and damage-associated molecular patterns were significantly increased. Prostaglandin E₁ treatment ameliorated the hepatic injury caused by DPH. In conclusion, cytochrome P450-dependent metabolic activation followed by the stimulation of the innate immune responses is involved in DPH-induced liver injury." @default.
- W2167185931 created "2016-06-24" @default.
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- W2167185931 date "2013-08-28" @default.
- W2167185931 modified "2023-09-27" @default.
- W2167185931 title "A Novel Mouse Model for Phenytoin-Induced Liver Injury: Involvement of Immune-Related Factors and P450-Mediated Metabolism" @default.
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- W2167185931 doi "https://doi.org/10.1093/toxsci/kft184" @default.
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