Asian Pacific Journal of Cancer Prevention

Asian Pacific Journal of Cancer Prevention (아시아태평양암예방학회)
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Common Variants in the PALB2 Gene Confer Susceptibility to Breast Cancer: a Meta-analysis

  • Zhang, Yi-Xia (Department of Ultrasonography, the First Affiliated Hospital of China Medical University) ;
  • Wang, Xue-Mei (Department of Ultrasonography, the First Affiliated Hospital of China Medical University) ;
  • Kang, Shu (Department of Ultrasonography, the First Affiliated Hospital of China Medical University) ;
  • Li, Xiang (Department of Ultrasonography, the First Affiliated Hospital of China Medical University) ;
  • Geng, Jing (Department of Ultrasonography, the First Affiliated Hospital of China Medical University)
  • Published : 2013.12.31
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Abstract

Objective: Increasing scientific evidence suggests that common variants in the PALB2 gene may confer susceptibility to breast cancer, but many studies have yielded inconclusive results. This meta-analysis aimed to derive a more precise estimation of the relationship between PALB2 genetic variants and breast cancer risk. Methods: An extensive literary search for relevant studies was conducted in PubMed, Embase, Web of Science, Cochrane Library, CISCOM, CINAHL, Google Scholar, CNKI and CBM databases from their inception through September 1st, 2013. A meta-analysis was performed using the STATA 12.0 software and crude odds ratios (ORs) with 95% confidence intervals (CIs) were calculated. Results: Six case-control studies were included with a total of 4,499 breast cancer cases and 6,369 healthy controls. Our meta-analysis reveals that PALB2 genetic variants may increase the risk of breast cancer (allele model: OR>1.36, 95%CI: 1.20~1.52, P < 0.001; dominant model: OR>1.64, 95%CI: 1.42~1.91, P < 0.001; respectively). Subgroup analyses by ethnicity indicated PALB2 genetic variants were associated with an increased risk of breast cancer among both Caucasian and Asian populations (all P < 0.05). No publication bias was detected in this meta-analysis (all P > 0.05). Conclusion: The current meta-analysis indicates that PALB2 genetic variants may increase the risk of breast cancer. Thus, detection of PALB2 genetic variants may be a promising biomarker approach.

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