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- W2763048132 abstract "Knowledge of the spatial organization of the gut microbiota is important for understanding the physical and molecular interactions among its members. These interactions are thought to influence microbial succession, community stability, syntrophic relationships, and resiliency in the face of perturbations. The complexity and dynamism of the gut microbiota pose considerable challenges for quantitative analysis of its spatial organization. Here, we illustrate an approach for addressing this challenge, using (i) a model, defined 15-member consortium of phylogenetically diverse, sequenced human gut bacterial strains introduced into adult gnotobiotic mice fed a polysaccharide-rich diet, and (ii) in situ hybridization and spectral imaging analysis methods that allow simultaneous detection of multiple bacterial strains at multiple spatial scales. Differences in the binding affinities of strains for substrates such as mucus or food particles, combined with more rapid replication in a preferred microhabitat, could, in principle, lead to localized clonally expanded aggregates composed of one or a few taxa. However, our results reveal a colonic community that is mixed at micrometer scales, with distinct spatial distributions of some taxa relative to one another, notably at the border between the mucosa and the lumen. Our data suggest that lumen and mucosa in the proximal colon should be conceptualized not as stratified compartments but as components of an incompletely mixed bioreactor. Employing the experimental approaches described should allow direct tests of whether and how specified host and microbial factors influence the nature and functional contributions of microscale mixing to the dynamic operations of the microbiota in health and disease." @default.
- W2763048132 created "2017-10-20" @default.
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- W2763048132 date "2017-10-09" @default.
- W2763048132 modified "2023-10-16" @default.
- W2763048132 title "Spatial organization of a model 15-member human gut microbiota established in gnotobiotic mice" @default.
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- W2763048132 doi "https://doi.org/10.1073/pnas.1711596114" @default.
- W2763048132 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5664539" @default.
- W2763048132 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/29073107" @default.
- W2763048132 hasPublicationYear "2017" @default.
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