Hepatic cytochrome P450 2E1 is increased in patients with nonalcoholic steatohepatitis

Hepatology : Official Journal of the American Association for the Study of Liver Diseases
M D WeltmanChristopher Liddle

Abstract

Nonalcoholic steatohepatitis (NASH) has multiple etiologic associations, but the pathogenesis is poorly understood. Cytochrome P450 (CYP) 2E1 is induced in the liver of patients who drink alcohol to excess and is important in the pathogenesis of alcoholic liver disease (ALD). We have previously shown that hepatic CYP2E1 is also increased in a rat dietary model of steatohepatitis. The aim of the present study was to test the hypothesis that hepatic CYP2E1 is induced in the liver of patients with NASH, defined on the basis of compatible liver histology and the exclusion of excessive alcohol intake. Sections of paraffin-embedded liver biopsy material from 31 subjects with NASH were evaluated and compared with sections from 10 histologically normal livers and 6 patients with ALD. Hepatic CYP2E1 and CYP3A were detected in liver sections by immunohistochemistry using specific anti-human CYP2E1 and CYP3A antibodies. As expected, normal livers showed CYP2E1 immunostaining confined to a rim, two to three cells thick, around terminal hepatic venule, while livers from alcoholic hepatitis patients showed increased CYP2E1 staining. CYP2E1 immunostaining was also increased in livers from patients with NASH, irrespective of the etiologic asso...Continue Reading

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