title: Myeloperoxidase -463 (G-->A) polymorphism associated with lower risk of lung cancer.
abstract: OBJECTIVE
  To study the association of the myeloperoxidase (MPO) -463 (G-->A) polymorphism with lung cancer risk.
  
  
  METHODS
  We performed a paired case-control analysis of 307 patients with primary lung cancer and an equal number of age-, sex-, and ethnicity-matched controls to evaluate the effect of the MPO -463 (G-->4A) polymorphism on disease susceptibility. We also performed conditional logistic regression analyses to evaluate the effect of the polymorphism adjusted for smoking status and chronic obstructive pulmonary disease, 2 established risk factors. We used 2 models for these analyses: one to compare homozygous (AA) genotypes with wild type (GG) and heterozygous (GA) genotypes and one to compare carriers (heterozygotes and AA homozygotes) with GG genotypes. Finally, we combined the results from the published studies of this putative association and performed a stratified analysis.
  
  
  RESULTS
  The AA genotype was inversely associated with susceptibility to lung cancer (odds ratio [OR], 0.39; 95% confidence interval [CI], 0.15-1.00). There was no association in heterozygotes. However, in the stratified analysis, we found an association between patients with the AA (OR, 0.44; 95% CI, 0.27-0.68) and GA (OR, 0.77; 95% CI, 0.64-0.93) genotypes vs the GG genotype.
  
  
  CONCLUSIONS
  Our results are consistent with previous reports and show that homozygotes of the less common A allele of MPO -463 polymorphism have a 2.6-fold lower risk of lung cancer.
authors.affiliation: Department of Neurology, Mayo Clinic, Rochester, Minn 55905, USA.
authors.forename: Orhun H
authors.initials: OH
authors.lastname: Kantarci
authors.forename: Timothy G
authors.initials: TG
authors.lastname: Lesnick
authors.forename: Ping
authors.initials: P
authors.lastname: Yang
authors.forename: Rebecca L
authors.initials: RL
authors.lastname: Meyer
authors.forename: David D
authors.initials: DD
authors.lastname: Hebrink
authors.forename: Cynthia T
authors.initials: CT
authors.lastname: McMurray
authors.forename: Brian G
authors.initials: BG
authors.lastname: Weinshenker
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000483:Alleles; D016022:Case-Control Studies; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006801:Humans; D016015:Logistic Models; D008175:Lung Neoplasms / Q000201:enzymology / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D009195:Peroxidase / Q000235:genetics*; D016133:Polymerase Chain Reaction; D011110:Polymorphism, Genetic; D029424:Pulmonary Disease, Chronic Obstructive / Q000150:complications; D012307:Risk Factors; D012907:Smoking / Q000009:adverse effects
chemical_list: D009195:Peroxidase