title: CYP17, CYP1A1 and COMT polymorphisms and the risk of adenomyosis and endometriosis in Taiwanese women.
abstract: BACKGROUND
  The aim of the study was to test whether the COMT, CYP1A1 and CYP17 genes influence the risk of developing adenomyosis and endometriosis.
  
  
  METHODS
  We conducted two case-control studies, where the cases (n = 198) had either of the two diseases, and controls (n = 312) were disease-free women. For the COMT gene, we selected the G/A nonsynonymous single-nucleotide polymorphism (SNP) that leads to valine-to-methionine (Val/Met) substitution. For the CYP1A1 gene, we used a functional T/C SNP in the 3'-noncoding region, and we genotyped a T/C functional SNP in the 5' region of the CYP17 gene for the present study. Hardy-Weinberg equilibrium was checked in both cases and controls. Logistic regression models were used to evaluate the genetic effect, with adjustment for other covariates.
  
  
  RESULTS
  We found that the homozygous COMT genotype that encodes low enzyme activity had an increased risk for adenomyosis with an age-adjusted odds ratio of 3.2 (95% confidence interval 1.3-7.8; P = 0.006). The COMT gene, however, was not associated with endometriosis. Neither the CYP1A1 nor CYP17 genes had any significant association with either of the two diseases.
  
  
  CONCLUSIONS
  The COMT gene significantly influences the risk of adenomyosis but not endometriosis. The present study does not provide evidence to support any of the three genes exerting pleiotropic effects on both diseases.
authors.affiliation: Graduate Institute of Medical Genetics, Kaohsiung Medical University, Taiwan, Republic of China.
authors.forename: S H
authors.initials: SH
authors.lastname: Juo
authors.forename: T N
authors.initials: TN
authors.lastname: Wang
authors.forename: J N
authors.initials: JN
authors.lastname: Lee
authors.forename: M T
authors.initials: MT
authors.lastname: Wu
authors.forename: C Y
authors.initials: CY
authors.lastname: Long
authors.forename: E M
authors.initials: EM
authors.lastname: Tsai
mesh_terms: D000328:Adult; D000367:Age Factors; D015992:Body Mass Index; D002394:Catechol O-Methyltransferase / Q000235:genetics*; D019363:Cytochrome P-450 CYP1A1 / Q000235:genetics*; D004715:Endometriosis / Q000235:genetics* / Q000473:pathology; D005260:Female; D005838:Genotype; D006801:Humans; D008875:Middle Aged; D011110:Polymorphism, Genetic; D013254:Steroid 17-alpha-Hydroxylase / Q000235:genetics*; D013624:Taiwan
chemical_list: D019363:Cytochrome P-450 CYP1A1; D013254:Steroid 17-alpha-Hydroxylase; D002394:Catechol O-Methyltransferase