title: The relationship between three well-characterized polymorphisms of the angiotensin converting enzyme gene and lung cancer risk: a case-control study and a meta-analysis.
abstract: OBJECTIVE
  The gene encoding angiotensin converting enzyme (ACE) is a promising candidate for lung cancer. We aimed to assess three well-characterized polymorphisms of the ACE gene (A-240T, I/D, A2350G) and lung cancer in Chinese people, and complete a meta-analysis of the association of I/D polymorphism with lung cancer.
  
  
  RESULTS
  In our case-control study, a total of 684 patients with lung cancer and 602 age-matched controls were recruited. Genotyping was performed using polymerase chain reaction (PCR) and ligase detection reactions (LDR) techniques. Single-locus analysis indicated that carriers of the A-240T allele had a significantly increased risk for lung cancer under additive (odds ratio (OR)=1.2; 95% confidence interval (CI): 1.02-1.42; P=0.027) and recessive (OR=1.8; 95% CI: 1.24-2.63; P=0.002) models, and that DD genotype carriers were 1.97 times more likely to develop lung cancer (95% CI: 1.25-3.11; P=0.004) compared with those with the I allele under the recessive model. However, no significance was observed in further haplotype analysis (P>0.05). In a meta-analysis of ACE gene insertion-deletion (I/D) polymorphism from six studies with 1183 lung cancer patients and 1065 controls, we failed to detect any significant association (overall OR=1.09; 95% CI: 0.84-1.41). A low probability of publication bias was observed.
  
  
  CONCLUSIONS
  Our results suggest that ACE gene A-240T polymorphism might be a genetic marker for the development of lung cancer in Chinese people.
authors.affiliation: Department of Respiratory Medicine, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China.
authors.forename: Min
authors.initials: M
authors.lastname: Gao
authors.forename: Yuli
authors.initials: Y
authors.lastname: Wang
authors.forename: Yuzhi
authors.initials: Y
authors.lastname: Shi
authors.forename: Dan
authors.initials: D
authors.lastname: Liu
authors.forename: Yin
authors.initials: Y
authors.lastname: Liang
authors.forename: Yan
authors.initials: Y
authors.lastname: Yu
authors.forename: Jiahui
authors.initials: J
authors.lastname: Zhaobin
authors.forename: Lili
authors.initials: L
authors.lastname: Zhu
authors.forename: Shoude
authors.initials: S
authors.lastname: Jin
mesh_terms: D000483:Alleles; D016022:Case-Control Studies; D005260:Female; D005787:Gene Frequency / Q000235:genetics; D056426:Genetic Loci / Q000235:genetics; D020022:Genetic Predisposition to Disease; D006239:Haplotypes / Q000235:genetics; D006801:Humans; D008175:Lung Neoplasms / Q000201:enzymology* / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D007703:Peptidyl-Dipeptidase A / Q000235:genetics*; D011110:Polymorphism, Genetic; D012307:Risk Factors
chemical_list: C488034:ACE protein, human; D007703:Peptidyl-Dipeptidase A