title: Relationship between alcohol drinking, ADH2 and ALDH2 genotypes, and risk for hepatocellular carcinoma in Japanese.
abstract: The polymorphism in the ALDH2 gene plays a central role in Asian alcohol hypersensitivity and has been associated with the risk for esophageal cancer. In the present study, we attempted to examine associations between the ADH2 and ALDH2 polymorphisms, alcohol drinking and hepatocellular carcinoma (HCC) development in a case-control study in Japan. One hundred and two patients with HCC (85 males and 17 females) and 125 control subjects (101 males and 24 females) were enrolled in the study. Higher cumulative amounts of alcohol consumption (drink-years of > or = 40 drinks/day x year) showed a significant association with HCC development (odds ratio, OR = 2.7; 95% CI = 1.3-5.5, adjusted for age and smoking). By contrast, we could find no association of the ALDH2 genotypes with HCC development (adjusted OR for ALDH2*1/*2 = 1.1; 95% CI = 0.6-2.1). Likewise, the ADH2 genotypes were not associated with HCC development (adjusted OR for ADH2*2/*2 = 0.8; 95% CI = 0.5-1.5). The present results do not support a contribution of acetaldehyde, an active metabolite of ethanol, to HCC development and rather indicate a direct involvement of ethanol in hepatocarcinogenesis.
authors.affiliation: Department of Social and Environmental Medicine, Osaka University Graduate School of Medicine, Suita, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Takeshita
authors.forename: X
authors.initials: X
authors.lastname: Yang
authors.forename: Y
authors.initials: Y
authors.lastname: Inoue
authors.forename: S
authors.initials: S
authors.lastname: Sato
authors.forename: K
authors.initials: K
authors.lastname: Morimoto
mesh_terms: D000368:Aged; D000426:Alcohol Dehydrogenase / Q000096:biosynthesis / Q000235:genetics*; D000428:Alcohol Drinking / Q000009:adverse effects*; D000444:Aldehyde Dehydrogenase / Q000096:biosynthesis / Q000235:genetics*; D006528:Carcinoma, Hepatocellular / Q000453:epidemiology / Q000209:etiology* / Q000235:genetics; D016022:Case-Control Studies; D005260:Female; D020022:Genetic Predisposition to Disease; D006801:Humans; D007564:Japan / Q000453:epidemiology; D008113:Liver Neoplasms / Q000453:epidemiology / Q000209:etiology* / Q000235:genetics; D008297:Male; D008875:Middle Aged; D012306:Risk; D012307:Risk Factors
chemical_list: D000426:Alcohol Dehydrogenase; D000444:Aldehyde Dehydrogenase