PMID: 9549311Apr 29, 1998Paper

Genetic polymorphism of human CYP2E1: new allels detected in exons and exon-intron junctions

Nihon Arukōru Yakubutsu Igakkai zasshi = Japanese journal of alcohol studies & drug dependence
S ItogaT Nakai

Abstract

Cytochrome P450-2E1 (CYP2E1) is a major component of the microsomal ethanol-oxidizing system (MEOS) and is also involved in the metabolism of a variety of foreign compounds including carcinogens. It has been shown that there is an interindividual variation in the expression of human hepatic CYP2E1. Gene-environmental interactions have been suggested to account for the difference. In this study, we screened nine exons of the human CYP2E1 gene for detecting allelic variants in genomic DNA samples obtained from 115 Japanese controls, 96 Japanese alcoholics and 124 American control subjects. A novel missense mutation in exon 2 (V72L) was found in Japanese controls, and another missense mutation in exon 8 (D394G) was detected in American Caucasians. In addition, two novel silent mutations in exon 6 (T303T) and exon 8 (F420F) were found in Japanese controls and alcoholics. Especially the silent mutation in exon 8 was highly polymorphic among three population groups. The mutation in exon 2 (V72L) was detected only in Japanese controls, but not in alcoholics although it shows no significant difference. Gene frequency of the silent mutation in exon 8 was significantly higher in Japanese than American Caucasians (34.8% vs 21.0%, p < 0.02...Continue Reading

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