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• W2000551398 abstract "Acetaminophen (APAP) induced increases in intrahepatic expression of interleukin (IL)-1 alpha, IL-1 beta, and IL-1 receptor antagonist (IL-1ra), when administered intraperitoneally. These observations prompted us to define the pathophysiological roles of IL-1ra in APAP-induced liver injury. Compared with wild-type (WT) mouse-derived hepatocytes, IL-1ra-deficient (IL-1ra KO)-derived hepatocytes exhibited more resistance against APAP but not APAP-derived major toxic metabolite, N-acetyl-p-benzoquinone imine (NAPQI). Moreover, the amounts of a major APAP adduct (selenium-binding protein), an indicator of NAPQI generation from APAP, was significantly lower in IL-1ra KO mice than WT mice with depressed intrahepatic expression of CYP1A2, CYP2E1, and CYP3A11, the enzymes crucially involved in NAPQI generation from APAP. These observations would indicate that IL-1ra deficiency impaired APAP metabolism. IL-1 alpha and IL-1 beta were expressed to similar extents in livers of untreated IL-1ra KO and WT mice. By contrast, the intranuclear amount of p65 of NF-kappaB, which can suppress the gene expression of CYP1A2, CYP2E1, and CYP3A11, was higher in untreated IL-1ra KO than WT mice. Moreover, when mice were intraperitoneally administered APAP (200 mg/kg), IL-1ra KO mice exhibited attenuated APAP-induced liver injury as evidenced by reductions in serum alanine transferase levels and histopathological changes such as centrilobular necrosis, hemorrhages, and leukocyte infiltration. Finally, when given 12 h before APAP challenge, IL-1 alpha repressed the intrahepatic expression of CYP1A2, CYP2E1, and CYP3A11, eventually reducing APAP-induced liver injury, along with reduction in APAP adducts. Collectively, NF-kappaB was activated without any stimuli by the genetic disruption of IL-1ra, and suppressed cytochrome P450 enzyme expression, thereby reducing APAP-induced liver injury." @default.
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• W2000551398 date "2009-01-01" @default.
• W2000551398 modified "2023-10-12" @default.
• W2000551398 title "Reduced acetaminophen-induced liver injury in mice by genetic disruption of IL-1 receptor antagonist" @default.
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• W2000551398 doi "https://doi.org/10.1038/labinvest.2008.110" @default.
• W2000551398 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/19002106" @default.
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