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Presence of the Genes cagA, cagE, virB11 and Allelic Variation of vacA of Helicobacter pyloriAre Associated with the Activity of Gastritis

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Open Journal of Gastroenterology 2014年第11期4卷 347-355页

作者： Pedro Pinheiro de Negreiros Bessa Francivandi Coelho Barbosa Ana Paula Santos do Carmo gildo barreira furtado Fernanda Capelo Barroso Silvia Helena Barem Rabenhosrt Laboratory of Molecular Genetics (LABGEM) Department of Pathology and Forensic Medicine Federal University of Ceara Fortaleza Brazil Hospital Universitário Walter Cantídeo—HUWC-UFC Fortaleza Brazil

Non-atrophic active chronic gastritis (ACG) is characterized by the presence of H. pylori in the gastric epithelium, known to be one of the first steps that precede progression to gastric adenocarcinoma. Inactive chronic gastritis (ICG) suggests that the patient has H. pylori gastritis, but this diagnosis is rarely made in routine histopathology. Clinical manifestations associated with H. pylori infection are potentially due to differences in virulence between strains;however, it is unclear if the progression of ACG to ICG depends on the H. pylori strain. The aim of this study was to compare the prevalence of the virulence factors of H. pylori found in patients with ACG and ICG, and its influence on the development of ICG. A significant association was observed between H. pylori detection by histological examination and the activity of gastritis (p 1 year) was reported by 28.6% of the ACG group and 42.5% of the ICG, while no evidence of association between long-term use of PPI and decreased inflammation was found in the patients studied. The genes cagA, cagE and virB11 were statistically associated with ACG (p = 0.01, p vacAs1 allele groups, ACG was associated with the most virulent group (p = 0.0015), while ICG was associated with the less virulent group (p < 0.001). The rate of co-infection was significantly higher in ICG than in ACG cases (p = 0.02). In conclusion, this study points to the role of virulent strains of H. pylori in the non-resolution of gastritis.

关键词： Active Chronic Gastritis Inactive Chronic Gastritis Helicobacter pylori Genotypes

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