Please use this identifier to cite or link to this item:
Type: Artigo
Title: Involvement of the Helicobacter pylori plasticity region and cag pathogenicity island genes in the development of gastroduodenal diseases
Author: Pacheco, A. R.
Proenca-Modena, J. L.
Sales, A. I. L.
Fukuhara, Y.
da Silveira, W. D.
Pimenta-Modena, J. L.
de Oliveira, R. B.
Brocchi, M.
Abstract: Infection by Helicobacter pylori is associated with the development of several gastroduodenal diseases, including gastritis, peptic ulcer disease (gastric ulcers and duodenal ulcers), and gastric adenocarcinoma. Although a number of putative virulence factors have been reported for H. pylori, there are conflicting results regarding their association with specific H. pylori-related diseases. In this work, we investigated the presence of virB11 and cagT, located in the left half of the cag pathogenicity island (cagPAI), and the jhp917-jhp918 sequences, components of the dupA gene located in the plasticity zone of H. pylori, in Brazilian isolates of H. pylori. We also examined the association between these genes and H. pylori-related gastritis, peptic ulcer disease, and gastric and duodenal ulcers in an attempt to identify a gene marker for clinical outcomes related to infection by H. pylori. The cagT gene was associated with peptic ulcer disease and gastric ulcers, whereas the virB11 gene was detected in nearly all of the samples. The dupA gene was not associated with duodenal ulcers or any gastroduodenal disease here analyzed. These results suggest that cagT could be a useful prognostic marker for the development of peptic ulcer disease in the state of Sao Paulo, Brazil. They also indicate that cagT is associated with greater virulence and peptic ulceration, and that this gene is an essential component of the type IV secretion system of H. pylori
Subject: Virulência
Sistemas de secreção tipo IV
Country: Alemanha
Editor: Springer
Rights: Fechado
Identifier DOI: 10.1007/s10096-008-0549-8
Date Issue: 2008
Appears in Collections:IB - Artigos e Outros Documentos

Files in This Item:
File Description SizeFormat 
000260637000005.pdf250.72 kBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.