Abstract
Helicobacter (H.) pylori strains that express the cagA and s1a vacA genes are associated with an increased risk for gastric cancer. Here, we examined the association between the products of these virulence genes with the development of gastric cancer by immunohistochemical staining of gastric biopsy specimens taken from 208 routine gastroscopies and 43 gastric cancer patients. The correlation was analyzed by multivariate logistic regression. CagA and VacA expressions in gastric mucosa were significantly associated with chronic gastritis (CG) and intestinal metaplasia (IM), respectively, accompanying CG independent of age. The association of CagA expression with IM accompanying CG was increased in patients over 50-year old (p < 0.01) and that of VacA with CG was significant in patients younger than 50 year (p < 0.05). VacA and CagA were associated with mild IM incidence (p = 0.025 and p = 0.076, respectively) but not advanced IM. In the 43 gastric cancer patients, positivity for VacA was significantly higher in cases of CG and IM than carcinoma (p = 0.042), while that for CagA was slightly higher for individuals with carcinoma than those with CG and IM. These results indicate that CagA and VacA are critical factors for inducing CG and the subsequent progression of IM from CG with an increasing age.
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Acknowledgements
This research was supported by Bio-industry Technology Development Program (312062-5) of iPET (Korea Institute of Planning and Evaluation for Technology in Food, Agriculture, Forestry and Fisheries), Ministry for Food, Agriculture, Forestry and Fisheries, and Kyungpook National University Research Fund, 2013, Republic of Korea.
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Ki, MR., Hwang, M., Kim, AY. et al. Role of vacuolating cytotoxin VacA and cytotoxin-associated antigen CagA of Helicobacter pylori in the progression of gastric cancer. Mol Cell Biochem 396, 23–32 (2014). https://doi.org/10.1007/s11010-014-2138-8
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DOI: https://doi.org/10.1007/s11010-014-2138-8