title: UDP-glucuronosyltransferase 1A7 genetic polymorphisms are associated with hepatocellular carcinoma risk and onset age.
abstract: OBJECTIVE
  It has been demonstrated that the UDP-glucuronosyltransferase (UGT) 1A7*3 allele is a risk factor for hepatocellular carcinoma (HCC) in German and Japanese populations. In this study, therefore, we evaluated the association between UGT1A7 genetic polymorphisms and HCC risk in southern Taiwan, where hepatitis B virus (HBV) and hepatitis C virus (HCV) infections are endemic.
  
  
  METHODS
  The 217 HCC patients and 291 controls enrolled in this case-control study were genotyped for UGT1A7 polymorphisms using polymerase chain reaction-restriction fragment length polymorphism.
  
  
  RESULTS
  Univariate logistic regression analysis revealed that presence of UGT1A7*2 and *3 alleles was associated with HCC risk [odds ratio (OR) = 1.50, 95% confidence interval (CI): 1.04 approximately 2.16 and OR = 1.73, 95% CI: 1.19 approximately 2.52, respectively]. Multiple logistic regression analysis demonstrated that significant independent risk factors for HCC were male gender (OR = 2.53, 95% CI: 1.42 approximately 4.52), HBV infection (OR = 13.73, 95% CI: 8.04 approximately 23.46), HCV infection (OR = 83.93, 95% CI: 37.01 approximately 190.32), and low-activity UGT1A7 genotype [high/low (H/L) genotype: OR = 1.93, 95% CI: 1.12 approximately 3.32; low/low (L/L) genotype: OR = 3.06, 95% CI: 1.50 approximately 6.24]. For male HCC patients, significantly earlier onset age was observed for those bearing the UGT1A7 low-activity genotype as opposed to those with the high-activity analogue (median age: 50 vs 59 yr; p < 0.05).
  
  
  CONCLUSIONS
  An inverse dose-response relationship was demonstrated between the detoxifying activity of the UGT1A7 genotypes and HCC. Of the male HCC patients, median onset age for those carrying an UGT1A7 low-activity genotype was 9 yr lower than those bearing the high-activity variant.
authors.affiliation: Division of Hepatology, Center of Hepato-Gastroenterology, Yuan's General Hospital, Kaohsiung, Taiwan.
authors.forename: Chien-Sen
authors.initials: CS
authors.lastname: Tseng
authors.forename: Kung-Sheng
authors.initials: KS
authors.lastname: Tang
authors.forename: Hoi-Wan
authors.initials: HW
authors.lastname: Lo
authors.forename: Chen-Guo
authors.initials: CG
authors.lastname: Ker
authors.forename: Hsiu-Chen
authors.initials: HC
authors.lastname: Teng
authors.forename: Ching-Shan
authors.initials: CS
authors.lastname: Huang
mesh_terms: D000328:Adult; D017668:Age of Onset; D000368:Aged; D000369:Aged, 80 and over; D000483:Alleles; D006528:Carcinoma, Hepatocellular / Q000235:genetics* / Q000821:virology; D016022:Case-Control Studies; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D005838:Genotype; D014453:Glucuronosyltransferase / Q000235:genetics*; D006801:Humans; D008113:Liver Neoplasms / Q000235:genetics* / Q000821:virology; D008297:Male; D008875:Middle Aged; D016133:Polymerase Chain Reaction; D011110:Polymorphism, Genetic; D012150:Polymorphism, Restriction Fragment Length; D012307:Risk Factors; D013624:Taiwan
chemical_list: D014453:Glucuronosyltransferase