title: P53 codon 72 polymorphism contributes to breast cancer risk: a meta-analysis based on 39 case-control studies.
abstract: P53 is a tumor suppressor gene and plays important roles in the etiology of breast cancer. Studies revealing conflicting results on the role of p53 codon 72 polymorphism (G>C) on breast cancer risk led us to perform a meta-analysis to investigate this relationship. Thirty-nine published studies, including 26,041 breast cancer cases and 29,679 controls were identified. Odds ratios (ORs) and 95% confidence intervals (CIs) were used to assess the strength of the associations. The overall results suggested that the variant genotypes were associated with a significantly reduced breast cancer risk (GC vs. GG: OR = 0.91, 95% CI: 0.83-1.00; CC/GC vs. GG: OR = 0.90, 95% CI: 0.82-0.99). In the stratified analyses, significantly decreased risks were also found among European populations (GC vs. GG: OR = 0.89, 95% CI: 0.80-0.99; CC/GC vs. GG: OR = 0.88, 95% CI: 0.80-0.98) and studies with population-based controls (GC vs. GG: OR = 0.88, 95% CI: 0.78-0.98; CC/GC vs. GG: OR = 0.87, 95% CI: 0.78-0.97). The results suggested that p53 codon 72 polymorphism may contribute to susceptibility to breast cancer, especially in Europeans. Additional well-designed large studies were required to validate this association in different populations.
authors.affiliation: Key Laboratory of Reproductive Medicine, Nanjing Medical University, 210029, Nanjing, China.
authors.forename: Zhizhong
authors.initials: Z
authors.lastname: Zhang
authors.forename: Meilin
authors.initials: M
authors.lastname: Wang
authors.forename: Dongmei
authors.initials: D
authors.lastname: Wu
authors.forename: Miaomiao
authors.initials: M
authors.lastname: Wang
authors.forename: Na
authors.initials: N
authors.lastname: Tong
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Tian
authors.forename: Zhengdong
authors.initials: Z
authors.lastname: Zhang
mesh_terms: D001943:Breast Neoplasms / Q000235:genetics*; D016022:Case-Control Studies; D003062:Codon; D005260:Female; D020022:Genetic Predisposition to Disease / Q000235:genetics*; D005838:Genotype; D006801:Humans; D020641:Polymorphism, Single Nucleotide / Q000235:genetics*; D012307:Risk Factors; D016159:Tumor Suppressor Protein p53 / Q000235:genetics*
chemical_list: D003062:Codon; D016159:Tumor Suppressor Protein p53