title: [The association of XPD G312A polymorphism with lung cancer risk: a meta-analysis].
abstract: OBJECTIVE
  It has been proven that close relation was existed between XPD polymorphism G312A and lung cancer risk. However, some of the results are not consistent. The aim of this study is to explore the impact of DNA repair gene XPD polymorphism G312A on lung cancer risk.
  
  
  METHODS
  The literatures eligible from PUBMED, EMBASE, CNKI and WANGFANG database were enrolled in the meta-analysis. Heterogeneity among combined studies was assessed. The pooled OR and 95%CI were calculated. The sensitivity analysis and the publication bias were evaluated by RevMan 5.0 and STATA 11.0.
  
  
  RESULTS
  There were 6554 cases and 8322 controls from 18 studies included in the meta-analysis. In total, individuals with 312A allele and 312AA genotype showed increased lung cancer risk (A vs. G: OR = 1.06, 95% CI: 1.00-1.12; AA vs. AG+GG: OR = 1.20, 95% CI: 1.06-1.36; AA vs. GG: OR = 1.19, 95% CI: 1.04-1.36). In Asians, individuals with 312AA genotype showed 6.15 fold and 6.20 fold increased lung cancer risk in recessive genetic model and homogenous contrast respectively (AA vs. AG+GG: OR = 7.15, 95% CI: 1.90-26.94; AA vs. GG: OR = 7.20, 95% CI: 1.91-27.15). In Caucasians, individuals with 312AA genotype showed a 15% increased lung cancer risk (OR = 1.15, 95% CI: 1.01-1.31).
  
  
  CONCLUSIONS
  XPD 312A allele is risk allele for lung cancer. Individuals with AA genotype have higher risk of lung cancer, especially in Asians.
authors.affiliation: Tianjin Key Laboratory of Lung Cancer Metastasis and Tumor Microenvironment, Tianjin Lung Cancer Institute, Tianjin Medical University General Hospital, Tianjin 300052, China.
authors.forename: Chaorong
authors.initials: C
authors.lastname: Mei
authors.forename: Wenjun
authors.initials: W
authors.lastname: Deng
authors.forename: Qinghua
authors.initials: Q
authors.lastname: Zhou
mesh_terms: D005838:Genotype; D006801:Humans; D008175:Lung Neoplasms / Q000209:etiology / Q000235:genetics*; D016017:Odds Ratio; D011110:Polymorphism, Genetic; D051759:Xeroderma Pigmentosum Group D Protein / Q000235:genetics*
chemical_list: D051759:Xeroderma Pigmentosum Group D Protein; C497292:ERCC2 protein, human