title: Association of p53 Arg72Pro polymorphism with esophageal cancer: a meta-analysis based on 14 case-control studies.
abstract: BACKGROUND
  The p53 tumor suppressor gene Arg72Pro polymorphism has been associated with esophageal cancer. However, the results were not consistent. Herein, this meta-analysis was performed to estimate the association between p53 Arg72Pro polymorphism and esophageal cancer.
  
  
  METHODS
  Electronic search of PubMed was conducted to select studies. Studies containing available genotype frequencies of Arg72Pro were chosen, and pooled odds ratio (OR) with 95% confidence interval (CI) was used to assess the association.
  
  
  RESULTS
  The final meta-analysis included 14 published studies with 4184 esophageal cancer cases and 7308 controls. The results suggested that the variant genotype was associated with the esophageal cancer risk in additive model (Pro vs. Arg: OR=1.146, 95% CI: 1.016-1.293, p=0.027) and in recessive model (Pro/Pro vs. Arg/Arg+Arg/Pro: OR=1.258, 95% CI: 1.021-1.551, p=0.031). In the stratified analysis by ethnicity, the data suggested that the increased esophageal cancer risk associated with p53 Arg72Pro polymorphism was more evident in the Asian group. The symmetric funnel plot, the Egger's test (p>0.05) and the Begg's test (p>0.05) suggested the lack of publication bias.
  
  
  CONCLUSIONS
  This meta-analysis suggests that p53 codon 72 polymorphism contributes to esophageal cancer risk, especially in Asians. To validate this association, further studies with more participants worldwide are needed to examine association between this polymorphism and esophageal cancer.
authors.affiliation: 1 Faculty of Environmental Science and Engineering, Kunming University of Science and Technology , Kunming, China .
authors.forename: Lanjun
authors.initials: L
authors.lastname: Zhao
authors.forename: Xilong
authors.initials: X
authors.lastname: Zhao
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Wu
authors.forename: Wenru
authors.initials: W
authors.lastname: Tang
mesh_terms: D019943:Amino Acid Substitution; D044466:Asian People / Q000235:genetics; D016022:Case-Control Studies; D004938:Esophageal Neoplasms / Q000453:epidemiology / Q000208:ethnology / Q000235:genetics*; D005260:Female; D005838:Genotype; D006801:Humans; D008297:Male; D008957:Models, Genetic; D020125:Mutation, Missense; D011110:Polymorphism, Genetic; D016159:Tumor Suppressor Protein p53
chemical_list: C495901:TP53 protein, human; D016159:Tumor Suppressor Protein p53