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- W2156592449 abstract "Over the last four decades, increases in the incidence of immune-mediated diseases in the Western world have been linked to changes in microbial exposure. It is becoming increasingly clear that the normal microbiota in the gut can profoundly alter susceptibility to a wide range of diseases, such as asthma, in which immune homeostasis is disrupted, yet the mechanisms governing this microbial influence remains poorly defined. In this study, we show that gastrointestinal exposure to PSA, a capsular polysaccharide derived from the commensal bacterium Bacteroides fragilis, significantly limits susceptibility to the induction of experimental asthma. We report that direct treatment of mice with PSA generates protection from asthma, and this effect can be given to a naïve recipient by adoptive transfer of CD4+ T cells from PSA-exposed mice. Remarkably, we found that these PSA-induced T cells are not canonical FoxP3+ regulatory T cells, but that they potently inhibit both Th1 and Th2 models of asthma in an IL-10-dependent fashion. These findings reveal that bacterial polysaccharides link the microbiota with the peripheral immune system by activating CD4+Foxp3− T cells upon exposure in the gut, and they facilitate resistance to unnecessary inflammatory responses via the production of IL-10." @default.
- W2156592449 created "2016-06-24" @default.
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- W2156592449 date "2014-10-27" @default.
- W2156592449 modified "2023-10-15" @default.
- W2156592449 title "Bacterial capsular polysaccharide prevents the onset of asthma through T-cell activation" @default.
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- W2156592449 doi "https://doi.org/10.1093/glycob/cwu117" @default.
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