Molecular Genetics, Microbiology and Virology

, Volume 32, Issue 1, pp 62–65 | Cite as

The importance of Helicobacter pylori tnpA, tnpB, and cagA genes in various gastrointestinal diseases

  • Reza Ghotaslou
  • Hamed Ebrahimzadeh Leylabadlo
  • Mohammad Taghi Akhi
  • Javid Sadeghi
  • Leila Yousefi
  • Abed Zahedi bialvaei
  • Mohammad Hossein Somi
Experimental Works


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.


Helicobacter pylori cag-PAI gastric cancer 


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Copyright information

© Allerton Press, Inc. 2017

Authors and Affiliations

  • Reza Ghotaslou
    • 1
  • Hamed Ebrahimzadeh Leylabadlo
    • 1
  • Mohammad Taghi Akhi
    • 2
    • 3
  • Javid Sadeghi
    • 2
  • Leila Yousefi
    • 2
  • Abed Zahedi bialvaei
    • 4
  • Mohammad Hossein Somi
    • 5
  1. 1.Immunology Research CenterTabriz University of Medical SciencesTabrizIran
  2. 2.Department of Microbiology, School of MedicineTabriz University of Medical SciencesTabrizIran
  3. 3.Infectious and Tropical Diseases Research CentreTabriz University of Medical SciencesTabrizIran
  4. 4.Department of Microbiology, Faculty of MedicineTabriz University of Medical SciencesTabrizIran
  5. 5.Department of Gastroenterology, School of MedicineTabriz University of Medical SciencesTabrizIran

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