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Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/54420
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dc.creatorMoacyr Ferreira Júniorpt_BR
dc.creatorSérgio de Assis Batistapt_BR
dc.creatorRafael Calvão Barbutopt_BR
dc.creatorAdriana d Gomespt_BR
dc.creatorDulciene Maria de Magalhães Queirozpt_BR
dc.creatorIvana Duval Araújopt_BR
dc.creatorMarcelo Vidigal Caliaript_BR
dc.date.accessioned2023-06-02T21:08:52Z-
dc.date.available2023-06-02T21:08:52Z-
dc.date.issued2017-
dc.citation.volume11pt_BR
dc.citation.issue61pt_BR
dc.citation.spage1pt_BR
dc.citation.epage7pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/54420-
dc.description.resumoBackground: 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. Results: The number of EPIYA C segments was significantly associated with the increased risk of gastric carcinoma (OR = 3.08, 95% CI = 1.74 to 5.45, p < 10-3) even after adjustment for age and gender. Higher number of EPIYA C segments was also associated with gastric atrophy (p = 0.04) and intestinal metaplasia (p = 0.007). Furthermore,patients infected by cagA strains possessing more than one EPIYA C segment showed decreased serum levels of pepsinogen I in comparison with those infected by strains containing one or less EPIYA C repeat. Otherwise, the number of EPIYA C segments did not associate with duodenal ulcer. Conclusions: Our results demonstrate that infection with H. pylori strains harbouring more than one CagA EPIYA C motif was clearly associated with gastric cancer, but not with duodenal ulcer. Higher number of EPIYA C segments was also associated with gastric precancerous lesions as demonstrated by histological gastric atrophic and metaplastic changes and decreased serum levels of pepsinogen I.pt_BR
dc.format.mimetypepdfpt_BR
dc.languageengpt_BR
dc.publisherUniversidade Federal de Minas Geraispt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentMED - DEPARTAMENTO DE CIRURGIApt_BR
dc.publisher.departmentMED - DEPARTAMENTO DE PROPEDÊUTICA COMPLEMENTARpt_BR
dc.publisher.initialsUFMGpt_BR
dc.relation.ispartofBMC Microbiology-
dc.rightsAcesso Abertopt_BR
dc.subjectHelicobacter pyloript_BR
dc.subjectGastric cancerpt_BR
dc.subjectPeptic ulcerapt_BR
dc.subjectBrazilpt_BR
dc.subject.otherHelicobacter pyloript_BR
dc.subject.otherNeoplasias Gástricaspt_BR
dc.subject.otherÚlcera Pépticapt_BR
dc.subject.otherBrasilpt_BR
dc.titleHigher number of Helicobacter pylori CagA EPIYA C phosphorylation sites increases the risk of gastric cancer, but not duodenal ulcerpt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://bmcmicrobiol.biomedcentral.com/articles/10.1186/1471-2180-11-61-
dc.identifier.orcidhttps://orcid.org/0000-0001-6488-734Xpt_BR
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