Higher number of Helicobacter pylori CagA EPIYA C phosphorylation sites increases the risk of gastric cancer,but not duodenal ulcer |
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| Authors: | Sérgio A Batista Gifone A Rocha Andreia MC Rocha Ivan EB Saraiva Mônica MDA Cabral Rodrigo C Oliveira Dulciene MM Queiroz |
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| Affiliation: | (1) Laboratory of Research in Bacteriology, Faculdade de Medicina, Universidade Federal de Minas Gerais, Av. Alfredo Balena, 190, sala 216, Belo Horizonte, Minas Gerais, 30130-100, Brazil;(2) Departament of Pathology, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil;(3) Laboratory of Cellular and Molecular Immunology, CPqRR-FIOCRUZ, Belo Horizonte, Brazil |
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| Abstract: | ![]()
Background Helicobacter pylori infection is one of the most common infections worldwide and is associated with gastric cancer and peptic ulcer. Bacterial virulence factors such as CagA have been shown to increase the risk of both diseases. Studies have suggested a causal role for CagA EPIYA polymorphisms in gastric carcinogenesis, and it has been shown to be geographically diverse. We studied associations between H. pylori CagA EPIYA patterns and gastric cancer and duodenal ulcer, in an ethnically admixed Western population from Brazil. CagA EPIYA was determined by PCR and confirmed by sequencing. A total of 436 patients were included, being 188 with gastric cancer, 112 with duodenal ulcer and 136 with gastritis. |
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