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Iljazovic, Aida; Roy, Urmi; Gálvez, Eric J C; Lesker, Till R; Zhao, Bei; Gronow, Achim; Amend, Lena; Will, Sabine E; Hofmann, Julia D; Pils, Marina C; Schmidt-Hohagen, Kerstin; Neumann-Schaal, Meina; Strowig, Till
Mucosal immunology, 01/2021, Letnik: 14, Številka: 1Journal Article
Diverse microbial signatures within the intestinal microbiota have been associated with intestinal and systemic inflammatory diseases, but whether these candidate microbes actively modulate host phenotypes or passively expand within the altered microbial ecosystem is frequently not known. Here we demonstrate that colonization of mice with a member of the genus Prevotella, which has been previously associated to colitis in mice, exacerbates intestinal inflammation. Our analysis revealed that Prevotella intestinalis alters composition and function of the ecosystem resulting in a reduction of short-chain fatty acids, specifically acetate, and consequently a decrease in intestinal IL-18 levels during steady state. Supplementation of IL-18 to Prevotella-colonized mice was sufficient to reduce intestinal inflammation. Hence, we conclude that intestinal Prevotella colonization results in metabolic changes in the microbiota, which reduce IL-18 production and consequently exacerbate intestinal inflammation, and potential systemic autoimmunity.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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