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Horvath, Thomas D.; Ihekweazu, Faith D.; Haidacher, Sigmund J.; Ruan, Wenly; Engevik, Kristen A.; Fultz, Robert; Hoch, Kathleen M.; Luna, Ruth Ann; Oezguen, Numan; Spinler, Jennifer K.; Haag, Anthony M.; Versalovic, James; Engevik, Melinda A.
iScience, 05/2022, Letnik: 25, Številka: 5Journal Article
Gut microbes can synthesize multiple neuro-active metabolites. We profiled neuro-active compounds produced by the gut commensal Bacteroides ovatus in vitro and in vivo by LC-MS/MS. We found that B. ovatus generates acetic acid, propionic acid, isobutyric acid, and isovaleric acid. In vitro, B. ovatus consumed tryptophan and glutamate and synthesized the neuro-active compounds glutamine and GABA. Consistent with our LC-MS/MS-based in vitro data, we observed elevated levels of acetic acid, propionic acid, isobutyric acid, and isovaleric acid in the intestines of B. ovatus mono-associated mice compared with germ-free controls. B. ovatus mono-association also increased the concentrations of intestinal GABA and decreased the concentrations of tryptophan and glutamine compared with germ-free controls. Computational network analysis revealed unique links between SCFAs, neuro-active compounds, and colonization status. These results highlight connections between microbial colonization and intestinal neurotransmitter concentrations, suggesting that B. ovatus selectively influences the presence of intestinal neurotransmitters. Display omitted •Bacteroides ovatus modulates key neuro-active compounds in vivo in gnotobiotic animals Neuroscience; Microbiology; Microbiome
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in: SICRIS
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