Asian Pacific Journal of Cancer Prevention

Asian Pacific Journal of Cancer Prevention (아시아태평양암예방학회)
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DNMT3a rs1550117 Polymorphism Association with Increased Risk of Helicobacter pylori Infection

  • Cao, Xue-Yuan (Department of Gastric and Colorectal Surgery, First Hospital of Jilin University) ;
  • Jia, Zhi-Fang (Division of Clinical Epidemiology, First Hospital of Jilin University) ;
  • Cao, Dong-Hui (Division of Clinical Epidemiology, First Hospital of Jilin University) ;
  • Kong, Fei (Division of Clinical Epidemiology, First Hospital of Jilin University) ;
  • Jin, Mei-Shan (Division of Pathology, First Hospital of Jilin University) ;
  • Suo, Jian (Department of Gastric and Colorectal Surgery, First Hospital of Jilin University) ;
  • Jiang, Jing (Division of Clinical Epidemiology, First Hospital of Jilin University)
  • Published : 2013.10.30
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Abstract

Background: DNA methyltransferase-3a (DNMT3a) plays significant roles in embryogenesis and the generation of aberrant methylation in carcinogenesis. This study aimed to investigate associations between single nucleotide polymorphisms (SNPs) of the DNMT3a gene and risk of Helicobacter pylori infection, gastric atrophy and gastric cancer. Methods: The subjects comprised 447 patients with gastric cancer; 111 individuals with gastric atrophy and 961 healthy controls. Two SNPs (rs1550117 and rs13420827) of the DNMT3a gene were genotyped by Taqman assay. DNMT3a expression was analyzed in cancer tissues from 89 patients by tissue microarray technique. Odds ratio (ORs) and 95% confidence intervals were calculated by multivariate logistic regression. Results: Among healthy controls, risk of H.pylori infection was significantly higher in subjects with the rs1550117 AA genotype, compared to those with GG/AG genotypes of DNMT3a [OR=2.08, (95%CI: 1.02-4.32)]. However, no significant correlation was found between the two SNPs and risk of developing gastric atrophy or gastric cancer. In addition, no increase in DNMT3a expression was observed in the gastric cancer with H.pylori infection. Conclusions: This study revealed that DNMT3a rs1550117 polymorphism is significantly associated with an increased risk of H. pylori infection, but did not support any evidence for contributions of DNMT3a rs1550117 and rs13420827 to either gastric atrophy or gastric cancer. The biological roles of DNMT3a polymorphisms require further investigation.

Keywords

References

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