Asian Pacific Journal of Cancer Prevention

Asian Pacific Journal of Cancer Prevention (아시아태평양암예방학회)
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DNMT3B -149 C>T and -579 G>T Polymorphisms and Risk of Gastric and Colorectal Cancer: a Meta-analysis

  • Khoram-Abadi, Khadijeh Mirzaee (Department of Anatomy, Internationl Campus, Shahid Sadoughi University of Medical Sciences) ;
  • Forat-Yazdi, Mohammad (Department of Internal Medicine, Internationl Campus, Shahid Sadoughi University of Medical Sciences) ;
  • Kheirandish, Shahnaz (Department of Internal Medicine, Internationl Campus, Shahid Sadoughi University of Medical Sciences) ;
  • Saeidi, Nasim (Department of Internal Medicine, Internationl Campus, Shahid Sadoughi University of Medical Sciences) ;
  • Zarezade, Zeinab (Department of Internal Medicine, Internationl Campus, Shahid Sadoughi University of Medical Sciences) ;
  • Mehrabi, Nahid (Department of Biology, Science Faculty, University of Yazd) ;
  • Neamatzadeh, Hossein (Department of Medical Genetics, Internationl Campus, Shahid Sadoughi University of Medical Sciences)
  • Published : 2016.06.01
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Abstract

Background: Numerous studies have investigated associations of DNA methyltransferase (DNMT) -149 C>T and -579 G>T polymorphisms with gastric cancer (GC) and colorectal cancer (CRC) susceptibility; however, the findings are inconsistent prompting the present meta-analysis. Materials and Methods: Related studies were identified from PubMed, Google scholar, and SID until 10 October 2015. Pooled odds ratios (ORs) and 95% confidence intervals (CIs) were used to assess the strength of the associations. Results: Eleven studies were included based on the search criteria for CRC and GC related to the DNMT3B 149 C>T (3,353 cases and 4,936 controls) and DNMT3B 579 G>T (1,387 cases and 2,064 controls) polymorphisms. There was no significant association overall between DNMT3B -149 and 579 polymorphisms and the risk of cancer. In the stratified analysis by cancer type, DNMT3B 579G>T polymorphism was associated with the risk of CRC and GC. While the DNMT3B -149C/T polymorphism was related with a significantly increased risk of CRC in two tested models, dominant (GG+GT vs. TT: OR 0.51, 95 % CI 0.38-0.69; P = 0.00, Pheterogeneity=0.69, $I^2=0%$) and heterozygote (GT vs. TT: OR 0.50, 95 % CI 0.37-0.69; P=0.00, Pheterogeneity=0.41, $I^2=0%$), no evidence of any association with GC risk was observed as in the pooled analyses. Conclusions: More studies are needed to assess associations of DNMT3B -149C/T and DNMT3B 579G>T polymorphisms with cancer in different ethnicities with large population sizes to generate comprehensive conclusions.

Keywords

References

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