Archaea influence composition of endoscopically visible ileocolonic biofilms
| Title: | Archaea influence composition of endoscopically visible ileocolonic biofilms |
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| Authors: | Elisabeth Orgler, Maximilian Baumgartner, Stefanie Duller, Christina Kumptisch, Bela Hausmann, Doris Moser, Vineeta Khare, Michaela Lang, Thomas Köcher, Adrian Frick, Markus Muttenthaler, Athanasios Makristathis, Christine Moissl-Eichinger, Christoph Gasche |
| Source: | Gut Microbes, Vol 16, Iss 1 (2024) |
| Publisher Information: | Taylor & Francis Group, 2024. |
| Publication Year: | 2024 |
| Collection: | LCC:Diseases of the digestive system. Gastroenterology |
| Subject Terms: | IBS, UC, bile acids, biofilm, archaea, Methanobrevibacter, Diseases of the digestive system. Gastroenterology, RC799-869 |
| More Details: | The gut microbiota has been implicated as a driver of irritable bowel syndrome (IBS) and inflammatory bowel disease (IBD). Recently we described, mucosal biofilms, signifying alterations in microbiota composition and bile acid (BA) metabolism in IBS and ulcerative colitis (UC). Luminal oxygen concentration is a key factor in the gastrointestinal (GI) ecosystem and might be increased in IBS and UC. Here we analyzed the role of archaea as a marker for hypoxia in mucosal biofilms and GI homeostasis. The effects of archaea on microbiome composition and metabolites were analyzed via amplicon sequencing and untargeted metabolomics in 154 stool samples of IBS-, UC-patients and controls. Mucosal biofilms were collected in a subset of patients and examined for their bacterial, fungal and archaeal composition. Absence of archaea, specifically Methanobrevibacter, correlated with disrupted GI homeostasis including decreased microbial diversity, overgrowth of facultative anaerobes and conjugated secondary BA. IBS-D/-M was associated with absence of archaea. Presence of Methanobrevibacter correlated with Oscillospiraceae and epithelial short chain fatty acid metabolism and decreased levels of Ruminococcus gnavus. Absence of fecal Methanobrevibacter may indicate a less hypoxic GI environment, reduced fatty acid oxidation, overgrowth of facultative anaerobes and disrupted BA deconjugation. Archaea and Ruminococcus gnavus could distinguish distinct subtypes of mucosal biofilms. Further research on the connection between archaea, mucosal biofilms and small intestinal bacterial overgrowth should be performed. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English |
| ISSN: | 19490976 1949-0984 1949-0976 |
| Relation: | https://doaj.org/toc/1949-0976; https://doaj.org/toc/1949-0984 |
| DOI: | 10.1080/19490976.2024.2359500 |
| Access URL: | https://doaj.org/article/26bffac2a9eb40418a42c4ac2a5d1048 |
| Accession Number: | edsdoj.26bffac2a9eb40418a42c4ac2a5d1048 |
| Database: | Directory of Open Access Journals |
| ISSN: | 19490976 19490984 |
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| DOI: | 10.1080/19490976.2024.2359500 |
| Published in: | Gut Microbes |
| Language: | English |