Molecular Biology Reports

, Volume 36, Issue 6, pp 1461–1467

PARP-1 Val762Ala polymorphism, CagA+H. pylori infection and risk for gastric cancer in Han Chinese population

  • Quanbao Zhang
  • Yumin Li
  • Xun Li
  • Wence Zhou
  • Bin Shi
  • Hao Chen
  • Wenzhen Yuan
Article

Abstract

Introduction PARP-1 plays important role in the BER (base excision repair) and maintenance of genomic integrity. Previous study found the Val762Ala genetic variant in the PARP-1 gene contributed to susceptibility of some cancers and decreased PARP-1 enzyme activity in response to oxidative damage. Helicobacter pylori (H. pylori) infection was thought to be one of the major causes of gastric cancer. In this study, we investigated the association between the PARP-1 Val762Ala polymorphism, CagA+H. pylori infection, and the risk for gastric cancer. Methods This hospital-based, case–control study was performed involving 556 individuals (236 cases with gastric cancer and 320 controls without evidence of neoplasm and gastrointestinal disease) using a PCR-RFLP method. Chi-square test and logistic regression analysis were used to count OR and 95% CI. Results 762Ala/Ala genotype was overrepresented in the cases (16.9%) compared with controls (10.3%), (OR, 1.942; 95% CI, 1.157–3.257, P = 0.011). Multivariate analysis showed that two factors were significantly associated with risk of gastric cancer, including CagA+H. pylori infection (OR, 2.562; 95% CI, 1.174–5.240, P = 0.037), PARP-1 762AA genotype (OR, 1.772; 95% CI, 1.065–3.867; P = 0.042). Stratification analysis indicated that among Cag+H. pylori positive subjects, 762Ala/Ala carriers had higher risk for developing gastric cancer compared with 762Val/Val carrier (OR, 2.337; 95% CI, 1.148–4.758; P = 0.017). Conclusion PARP-1 762Ala/Ala could be a risk factor for gastric cancer in Han Chinese population; PARP-1 762Val/Ala polymorphism and Cag+H. pylori infection jointly contribute to higher risk for gastric cancer.

Keywords

Poly(ADP ribose) polymerase-1 Polymorphism Helicobacter pylori CagA Gastric cancer Risk 

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Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • Quanbao Zhang
    • 1
  • Yumin Li
    • 1
  • Xun Li
    • 1
  • Wence Zhou
    • 1
  • Bin Shi
    • 2
  • Hao Chen
    • 1
  • Wenzhen Yuan
    • 3
  1. 1.Department of General SurgeryThe First Hospital of Lanzhou UniversityLanzhouChina
  2. 2.Department of ICUThe First Hospital of Lanzhou UniversityLanzhouChina
  3. 3.Department of Surgery OncologyThe First Hospital of Lanzhou UniversityLanzhouChina

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