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Determination of Helicobacter pylori virulence by analysis of the cag pathogenicity island isolated from Iranian patients.
- Source :
- Digestive & Liver Disease; Sep2009, Vol. 41 Issue 9, p634-638, 5p
- Publication Year :
- 2009
-
Abstract
- Abstract: Background: The cag pathogenicity island (PAI), which can be divided into two parts, cagI and cagII, is the most well-known virulence factor of Helicobacter pylori. Aims: We investigated the association between genetic variations within the cag PAI (cagA and cagE in the cagI and cagT in the cagII) and clinical outcomes in Iranian patients. Subjects: A total of 231 patients including 182 patients with gastritis, 41 with peptic ulcer and 8 with gastric cancer. Methods: The presence of the cagA, cagE and cagT genes were measured by polymerase chain reaction and the results were compared with clinical outcomes and gastric histology. Results: The cagA, cagE and cagT genes were found in 154 (66.7%), 90 (39.0%) and 70 (30.3%) of clinical isolates. At least 144 (62.3%) strains possessed partially deleted cag PAI (e.g., 69 [29.9%] strains were cagA-positive, but cagE and cagT-negative). Conclusion: The single genes as well as the combination of genes in the cag PAI appeared not to be useful markers to predict H. pylori-related diseases in Iranian patients. The genomic sequences of the cag PAI in Iranian strains might be considerably different from those in other geographic locations. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 15908658
- Volume :
- 41
- Issue :
- 9
- Database :
- Supplemental Index
- Journal :
- Digestive & Liver Disease
- Publication Type :
- Academic Journal
- Accession number :
- 43650740
- Full Text :
- https://doi.org/10.1016/j.dld.2009.01.010