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Genetic polymorphisms in DNA repair genes XPC, XPD, and XRCC4, and susceptibility to Helicobacter pylori infection-related gastric antrum adenocarcinoma in Guangxi population, China.

Abstract
Genetic polymorphisms in DNA repair genes may influence individual variation in DNA repair capacity, which may be associated with risk of gastric antrum adenocarcinoma (GAA) related to Helicobacter pylori infection. This study, including 361 GAAs and 616 controls without any evidence of tumors, was designed to evaluate the association between the polymorphisms of DNA repair genes XPC Ala499Val (RS#2228000) and Lys939Gln (RS#2228001), XPD Lys751Gln (RS#13181), and XRCC4 Ala247Ser (RS#3734091) and Ser298Asn (RS#1805377), and GAA risk for Guangxi population by means of TaqMan-PCR analysis. Increased risks of GAA were found for individuals with H. pylori positive [odds ratio (OR), 2.48; 95% confidence interval (CI), 1.84-3.33] or cagA positive (OR, 7.34; 95% CI, 5.46-9.87). No differences were observed among the studied groups with regard to the genotype distribution of XPC codons 499 and 939 and of XRCC4 codon 247; but XPD codon 751 genotypes with Gln [ORs (95% CI) were 2.67 (1.98-3.58) and 3.97 (2.64-5.99) for Lys/Gln and Gln/Gln, respectively] and XRCC4 codon 298 genotypes with Asn [ORs (95% CI) were 3.01 (2.21-4.10) and 4.78 (3.24-7.05) for Ser/Asn and Asn/Asn, respectively] increased the risk of GAA. Interestingly, there was an interactive effect between the risk genotypes of these two genes and cagA-positive status in the GAA risk (OR(interact) = 2.05 and 2.08, respectively). However, we did not find the gene-H. pylori-status interaction effects on the risk of GAA (P(interact) > 0.05). The results suggested that the polymorphisms of XPD codon 751 and XRCC4 codon 298 are associated with an increased risk of developing H. pylori-related GAA among Guangxi population.
AuthorsXi-Dai Long, Yun Ma, Yong-Zhi Huang, Yun Yi, Qiu-Xiang Liang, Ai-Min Ma, Li-Ping Zeng, Guo-Hui Fu
JournalMolecular carcinogenesis (Mol Carcinog) Vol. 49 Issue 6 Pg. 611-8 (Jun 2010) ISSN: 1098-2744 [Electronic] United States
PMID20232359 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
Copyright(c) 2010 Wiley-Liss, Inc.
Chemical References
  • DNA-Binding Proteins
  • XRCC4 protein, human
  • XPC protein, human
  • Xeroderma Pigmentosum Group D Protein
  • ERCC2 protein, human
Topics
  • Adenocarcinoma (epidemiology, genetics, microbiology)
  • Adult
  • Aged
  • China (epidemiology)
  • DNA Repair
  • DNA-Binding Proteins (genetics)
  • Female
  • Genetic Predisposition to Disease (epidemiology)
  • Helicobacter pylori (isolation & purification)
  • Humans
  • Male
  • Middle Aged
  • Polymorphism, Genetic
  • Stomach Neoplasms (epidemiology, genetics, microbiology)
  • Xeroderma Pigmentosum Group D Protein (genetics)

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