Microbial composition of gastric lesions: differences based on Helicobacter pylori virulence profile
Abstract Helicobacter pylori infection is a major risk factor for gastric adenocarcinomas. In the case of the intestinal subtype, chronic gastritis and intestinal metaplasia are well-known sequential steps in carcinogenesis. H. pylori has high genetic diversity that can modulate virulence and pathog...
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Nature Portfolio
2024-11-01
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| Online Access: | https://doi.org/10.1038/s41598-024-80394-2 |
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| author | Silvia Helena Barem Rabenhorst Adriana Camargo Ferrasi Morgana Maria de Oliveira Barboza Vânia Maria Maciel Melo |
| author_facet | Silvia Helena Barem Rabenhorst Adriana Camargo Ferrasi Morgana Maria de Oliveira Barboza Vânia Maria Maciel Melo |
| author_sort | Silvia Helena Barem Rabenhorst |
| collection | DOAJ |
| description | Abstract Helicobacter pylori infection is a major risk factor for gastric adenocarcinomas. In the case of the intestinal subtype, chronic gastritis and intestinal metaplasia are well-known sequential steps in carcinogenesis. H. pylori has high genetic diversity that can modulate virulence and pathogenicity in the human host as a cag Pathogenicity Island (cagPAI). However, bacterial gene combinations do not always explain the clinical presentation of the disease, indicating that other factors associated with H. pylori may play a role in the development of gastric disease. In this context, we characterized the microbial composition of patients with chronic gastritis (inactive and active), intestinal metaplasia, and gastric cancer as well as their potential association with H. pylori. To this end, 16 S rRNA metagenomic analysis was performed on gastric mucosa samples from patients with different types of lesions and normal gastric tissues. Our main finding was that H. pylori virulence status can contribute to significant differences in the constitution of the gastric microbiota between the sequential steps of the carcinogenesis cascade. Differential microbiota was observed in inactive and active gastritis dependent of the H. pylori presence and status (p = 0.000575). Pseudomonades, the most abundant order in the gastritis, was associated the presence of non-virulent H. pylori in the active gastritis. Notably, there are indicator genera according to H. pylori status that are poorly associated with diseases and provide additional evidence that the microbiota, in addition to H. pylori, is relevant to gastric carcinogenesis. |
| format | Article |
| id | doaj-art-9a2ff775bc154d9eb82f4eadb261ed27 |
| institution | OA Journals |
| issn | 2045-2322 |
| language | English |
| publishDate | 2024-11-01 |
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| spelling | doaj-art-9a2ff775bc154d9eb82f4eadb261ed272025-08-20T02:22:30ZengNature PortfolioScientific Reports2045-23222024-11-0114111510.1038/s41598-024-80394-2Microbial composition of gastric lesions: differences based on Helicobacter pylori virulence profileSilvia Helena Barem Rabenhorst0Adriana Camargo Ferrasi1Morgana Maria de Oliveira Barboza2Vânia Maria Maciel Melo3Genetic Molecular Laboratory, Pathology and Forensic Medicine Department, Federal University of CearáDepartment of Internal Medicine, Botucatu Medical School, Sao Paulo State UniversityGenetic Molecular Laboratory, Pathology and Forensic Medicine Department, Federal University of CearáMicrobial Ecology and Biotechnology Laboratory, Department of Biology, Federal University of CearáAbstract Helicobacter pylori infection is a major risk factor for gastric adenocarcinomas. In the case of the intestinal subtype, chronic gastritis and intestinal metaplasia are well-known sequential steps in carcinogenesis. H. pylori has high genetic diversity that can modulate virulence and pathogenicity in the human host as a cag Pathogenicity Island (cagPAI). However, bacterial gene combinations do not always explain the clinical presentation of the disease, indicating that other factors associated with H. pylori may play a role in the development of gastric disease. In this context, we characterized the microbial composition of patients with chronic gastritis (inactive and active), intestinal metaplasia, and gastric cancer as well as their potential association with H. pylori. To this end, 16 S rRNA metagenomic analysis was performed on gastric mucosa samples from patients with different types of lesions and normal gastric tissues. Our main finding was that H. pylori virulence status can contribute to significant differences in the constitution of the gastric microbiota between the sequential steps of the carcinogenesis cascade. Differential microbiota was observed in inactive and active gastritis dependent of the H. pylori presence and status (p = 0.000575). Pseudomonades, the most abundant order in the gastritis, was associated the presence of non-virulent H. pylori in the active gastritis. Notably, there are indicator genera according to H. pylori status that are poorly associated with diseases and provide additional evidence that the microbiota, in addition to H. pylori, is relevant to gastric carcinogenesis.https://doi.org/10.1038/s41598-024-80394-2Helicobacter pyloriGastric cancerMetagenomics |
| spellingShingle | Silvia Helena Barem Rabenhorst Adriana Camargo Ferrasi Morgana Maria de Oliveira Barboza Vânia Maria Maciel Melo Microbial composition of gastric lesions: differences based on Helicobacter pylori virulence profile Scientific Reports Helicobacter pylori Gastric cancer Metagenomics |
| title | Microbial composition of gastric lesions: differences based on Helicobacter pylori virulence profile |
| title_full | Microbial composition of gastric lesions: differences based on Helicobacter pylori virulence profile |
| title_fullStr | Microbial composition of gastric lesions: differences based on Helicobacter pylori virulence profile |
| title_full_unstemmed | Microbial composition of gastric lesions: differences based on Helicobacter pylori virulence profile |
| title_short | Microbial composition of gastric lesions: differences based on Helicobacter pylori virulence profile |
| title_sort | microbial composition of gastric lesions differences based on helicobacter pylori virulence profile |
| topic | Helicobacter pylori Gastric cancer Metagenomics |
| url | https://doi.org/10.1038/s41598-024-80394-2 |
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