title: A2 allele polymorphism of the CYP17 gene and prostate cancer risk in an iranian population.
abstract: BACKGROUND
  Studies have shown that alterations of steroid hormone metabolism, particularly involving testosterone, affect the risk of prostate cancer. Therefore, genetic variation in genes of enzymes which are involved could be of importance. The gene most interest is CYP17, whose enzyme product has an essential role in testosterone hormone synthesis. Some studies have indicated that the A2 allele polymorphism of CYP17 associated with increased risk of prostate cancer that could be affected by ethnicity. Therefore, the aim of this study was determination of presence or absence of the A2 allele in patients with prostate cancer.
  
  
  METHODS
  We studied the association of A2 allele and prostate cancer among 74 patients with prostate cancer and 128 healthy men which were referred to hospitals of SBMU.
  
  
  RESULTS
  This study revealed a significant association between prostate cancer risk and the A2 allele in an Iranian population so that A1A2 and A2A2 genotypes were more common in cases than controls with P-values of 0.029 and 0.010, respectively.
  
  
  CONCLUSIONS
  Results of our study support a possible role of the A2 allele in sporadic prostate cancer development in Iran, in line with findings elsewhere.
authors.affiliation: Medical Genetics Department, Shahid Beheshti of Medical Science University, Iran.
authors.forename: Arezu
authors.initials: A
authors.lastname: Karimpur-Zahmatkesh
authors.forename: Farah
authors.initials: F
authors.lastname: Farzaneh
authors.forename: Farkhondeh
authors.initials: F
authors.lastname: Pouresmaeili
authors.forename: Jalil
authors.initials: J
authors.lastname: Hosseini
authors.forename: Eznollah
authors.initials: E
authors.lastname: Azarghashb
authors.forename: Mohammad
authors.initials: M
authors.lastname: Yaghoobi
mesh_terms: D000368:Aged; D000483:Alleles; D016022:Case-Control Studies; D056726:Genetic Association Studies; D020022:Genetic Predisposition to Disease; D014644:Genetic Variation; D005838:Genotype; D006801:Humans; D007492:Iran; D008297:Male; D008875:Middle Aged; D020641:Polymorphism, Single Nucleotide; D011471:Prostatic Neoplasms / Q000235:genetics*; D012306:Risk; D013254:Steroid 17-alpha-Hydroxylase / Q000235:genetics*; D013739:Testosterone / Q000096:biosynthesis
chemical_list: D013739:Testosterone; D013254:Steroid 17-alpha-Hydroxylase