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Roseburia intestinalis TSDC19.2-1.1

ABSTRACT: Strain Roseburia intestinalis TSDC19.2-1.1 (species Roseburia intestinalis) was isolated from the fecal microbiota of a USA female at time point zero (bacterial isolates were sequenced from this donor on day 0 and 47). The species name was assigned by genome clustering.

PROVIDER: PRJEB3855 | ENA |

REPOSITORIES: ENA

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The Human Gut Firmicute Roseburia intestinalis is a Primary Degrader of Dietary β-Mannans

Project description:β-Mannans are plant cell wall polysaccharides that are commonly found in human diets. However, a mechanistic understanding into the key populations that degrade this glycan is absent, especially for the dominant Firmicutes phylum. Here, we show that the prominent butyrate-producing Firmicute Roseburia intestinalis expresses two loci conferring metabolism of β-mannans. We combine multi-“omic” analyses and detailed biochemical studies to comprehensively characterize loci-encoded proteins that are involved in β-mannan capturing, importation, de-branching and degradation into monosaccharides. In mixed cultures, R. intestinalis shares the available β-mannan with Bacteroides ovatus, demonstrating that the apparatus allows coexistence in a competitive environment. In murine experiments, β-mannan selectively promotes beneficial gut bacteria, exemplified by increased R. intestinalis, and reduction of mucus-degraders. Our findings highlight that R. intestinalis is a primary degrader of this dietary fiber and that this metabolic capacity could be exploited to selectively promote key members of the healthy microbiota using β-mannan-based therapeutic interventions.

2019-02-21 | PXD012448 | Pride

Interactions between Roseburia intestinalis and diet modulate atherogenesis in a murine model

Project description:Background: Humans with metabolic and inflammatory diseases frequently harbor lower levels of butyrate-producing bacteria in their gut. However, it is not known whether variation in the levels of these organisms is causally linked with disease development and whether diet modifies the impact of these bacteria on health. Results: We use germ-free apolipoprotein E-deficient mice colonized with synthetic microbial communities that differ in their capacity to generate butyrate to demonstrate that Roseburia intestinalis interacts with dietary components to (i) impact gene expression in the intestine, directing metabolism away from glycolysis and toward fatty acid utilization, (ii) improve intestinal barrier function, (iii) lower systemic inflammation and (iv) ameliorate atherosclerosis. Furthermore, intestinal administration of butyrate improves gut barrier function and reduces atherosclerosis development. Conclusions: Altogether, our results illustrate how modifiable diet-by-microbiota interactions impact cardiovascular disease, and suggest that interventions aimed at increasing the representation of butyrate-producing bacteria may provide protection against atherosclerosis.

2018-08-29 | GSE119141 | GEO

Clostridium TSDC19.2-1.1

Project description:Strain Clostridium TSDC19.2-1.1 (species Clostridium) was isolated from the fecal microbiota of a USA female at time point zero (bacterial isolates were sequenced from this donor on day 0 and 47). The species name was assigned by genome clustering.

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Clostridiales TSDC19.2-1.1

Project description:Strain Clostridiales TSDC19.2-1.1 (species Clostridiales) was isolated from the fecal microbiota of a USA female at time point zero (bacterial isolates were sequenced from this donor on day 0 and 47). The species name was assigned by genome clustering.

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Bacteroides TSDC19.2-1.1

Project description:Strain Bacteroides TSDC19.2-1.1 (species Bacteroides) was isolated from the fecal microbiota of a USA female at time point zero (bacterial isolates were sequenced from this donor on day 0 and 47). The species name was assigned by genome clustering.

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