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Project description:Gut microbiome research is rapidly moving towards the functional characterization of the microbiota by means of shotgun meta-omics. Here, we selected a cohort of healthy subjects from an indigenous and monitored Sardinian population to analyze their gut microbiota using both shotgun metagenomics and shotgun metaproteomics. We found a considerable divergence between genetic potential and functional activity of the human healthy gut microbiota, in spite of a quite comparable taxonomic structure revealed by the two approaches. Investigation of inter-individual variability of taxonomic features revealed Bacteroides and Akkermansia as remarkably conserved and variable in abundance within the population, respectively. Firmicutes-driven butyrogenesis (mainly due to Faecalibacterium spp.) was shown to be the functional activity with the higher expression rate and the lower inter-individual variability in the study cohort, highlighting the key importance of the biosynthesis of this microbial by-product for the gut homeostasis. The taxon-specific contribution to functional activities and metabolic tasks was also examined, giving insights into the peculiar role of several gut microbiota members in carbohydrate metabolism (including polysaccharide degradation, glycan transport, glycolysis and short-chain fatty acid production). In conclusion, our results provide useful indications regarding the main functions actively exerted by the gut microbiota members of a healthy human cohort, and support metaproteomics as a valuable approach to investigate the functional role of the gut microbiota in health and disease.
2017-07-19 | PXD005780 | Pride
Project description:We report the RNAseq data from captive common marmosets with gastrointestinal diseases housed at MIT. Samples were collected at necropsy from the duodenum and jejunum from 3 animals presenting with intestinal bowel disease (IBD) and 3 animals with duodenal strictures/ulcers. To determine the transcriptomic profile of animals with strictures, we evaluated the duodenal tissue immediately adjacent to the stricture lesion and compared it to the duodenum of non-stricture (IBD) animals as a non-stricture control. To determine the transcriptomic profile of animals with IBD, we evaluated the jejunum of animals with IBD with the jejunum of non-IBD (stricture) animals as a non-IBD control. Minimal pathology was observed in the non-IBD control but enteritis was noted in non-stricture controls. We report that stricture may affect the intestinal absorption and lipid metabolism in marmosets, while IBD increases immune responses.
2020-08-26 | GSE156839 | GEO