The importance of Helicobacter pylori tnpA, tnpB, and cagA genes in various gastrointestinal diseases
- 19 Downloads
The cag (cytotoxin-associated gene) pathogenicity island (cagPAI) is one of the major virulence determinants of Helicobacter pylori (H. pylori). The purpose of this study was to investigate the association of the three genes (tnpA, tnpB, and cagA) in H. pylori isolated from Azerbaijani patients with the different gastrointestinal disease. A total of 362 gastric biopsies were collected from hospitals of Tabriz University of Medical Sciences, and were cultured on Brucella agar. The tnpA, tnpB, and cagA genes were detected by PCR. Of the total 264 H. pylori isolates, tnpA, tnpB, and cagA genes were detected in 120 (45.5%), 56 (21.2%) and 172 (65.2%), respectively. A significant association between tnpA and tnpB genes and clinical outcomes were found (P < 0.05). The cagA status was not related to clinical outcomes in our subjects. The predominant genotype among cag-PAI is the cagA. The prevalence of tnpA, tnpB, and cagA genes are high in patients with gastric cancer, and a significant association is revealed between tnpA and tnpB with gastric cancer.
KeywordsHelicobacter pylori cag-PAI gastric cancer
Unable to display preview. Download preview PDF.
- 10.Owen, R.J., Peters, T.M., Varea, R., Teare, E.L., and Saverymuttu, S, Molecular epidemiology of Helicobacter pylori in England: Prevalence of cag pathogenicity island markers and IS605 presence in relation to patient age and severity of gastric disease, FEMS Immunol. Med. Microbiol., 2001, vol. 30, pp. 65–71.CrossRefPubMedGoogle Scholar
- 11.Sambrook, J. and Russell, D.W., Molecular Cloning. A Laboratory Manual, New York: Cold Spring Harbor Laboratory Press, 2001.Google Scholar
- 17.Kersulyte, D., Velapatino, B., Dailide, G., et al., Transposable element ISHp608 of Helicobacter pylori: Nonrandom geographic distribution, functional organization, and insertion specificity, J. Bacteriol., 2002, vol. 184, pp. 992–1002.Google Scholar
- 19.Kidd, M., Louw, J.A., and Marks, I.N., Helicobacter pylori in Africa: Observations on an “enigma within an enigma”, J. Gastroenterol. Hepatol., 1999, vol. 14, pp. 851–858.Google Scholar