title: Association between X-ray repair cross complementing group 1 codon 399 and 194 polymorphisms and lung cancer risk: a meta-analysis.
abstract: Genetic variations in DNA repair genes are thought to modify DNA repair capacity and suggested to be related to cancer risk. However, epidemiological results have been inconsistent. In this meta-analysis, we assessed reported studies of association between polymorphisms of X-ray repair cross complementing group 1 (XRCC1) codon 399 and 194, and lung cancer risk. We found decreased lung cancer risk among subjects carrying XRCC1 codon 194 Arg/Trp genotype [odds ratio (OR)=0.88, 95% confidence interval (95% CI): 0.79-0.97], using 4848 cases and 6592 controls from 16 studies. There was no association between lung cancer risk and XRCC1 codon 399 polymorphism in total population, when stratified by source of control, we found a protective effect of the XRCC1 codon 399 Gln/Gln and Arg/Gln or Gln/Gln polymorphisms for lung cancer on the basis of population control (OR=0.73, 95% CI: 0.58-0.92; OR=0.86, 95% CI: 0.77-0.97, respectively). Data indicated that certain XRCC1 codon 399 and 194 variant may affect the susceptibility of lung cancer. Recommendations for further studies include pooling of individual data to facilitate evaluation of multigenic effects and detailed analysis of effect modification by environmental exposure.
authors.affiliation: National Institute of Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing 100050, PR China.
authors.forename: Yadong
authors.initials: Y
authors.lastname: Wang
authors.forename: Haiyan
authors.initials: H
authors.lastname: Yang
authors.forename: Haishan
authors.initials: H
authors.lastname: Li
authors.forename: Li
authors.initials: L
authors.lastname: Li
authors.forename: Haiyu
authors.initials: H
authors.lastname: Wang
authors.forename: Cui'e
authors.initials: C
authors.lastname: Liu
authors.forename: Yuxin
authors.initials: Y
authors.lastname: Zheng
mesh_terms: D003062:Codon; D004268:DNA-Binding Proteins / Q000235:genetics*; D020022:Genetic Predisposition to Disease; D006801:Humans; D008175:Lung Neoplasms / Q000235:genetics*; D011110:Polymorphism, Genetic; D012307:Risk Factors; D000076105:X-ray Repair Cross Complementing Protein 1
chemical_list: D003062:Codon; D004268:DNA-Binding Proteins; D000076105:X-ray Repair Cross Complementing Protein 1; C000619371:XRCC1 protein, human