Systems-level metabolism of the Altered Schaedler Flora, a complete gut microbiota

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Title: Systems-level metabolism of the Altered Schaedler Flora, a complete gut microbiota
Author(s): Biggs, MB
Medlock, GL
Moutinho, TJ
Lees, HJ
Swann, JR
Kolling, GL
Papin, JA
Item Type: Journal Article
Abstract: The Altered Schaedler Flora (ASF) is a model microbial community with both in vivo and in vitro relevance. Here we provide the first characterization of the ASF community in vitro, independent of a murine host. We compared the functional genetic content of the ASF to wild murine metagenomes and found that the ASF functionally represents wild microbiomes better than random consortia of similar taxonomic composition. We developed a chemically-defined medium that supported growth of seven of the eight ASF members. To elucidate the metabolic capabilities of these ASF species—including potential for interactions such as cross feeding—we performed a spent media screen and analyzed the results through dynamic growth measurements and non-targeted metabolic profiling. We found that cross-feeding is relatively rare (32 of 3 570 possible cases), but is enriched between Clostridium ASF356 and Parabacteroides ASF519. We identified many cases of emergent metabolism (856 of 3 570 possible cases). These data will inform efforts to understand ASF dynamics and spatial distribution in vivo, to design pre- and probiotics that modulate relative abundances of ASF members, and will be essential for validating computational models of ASF metabolism. Well-characterized, experimentally tractable microbial communities enable research that can translate into more effective microbiome-targeted therapies to improve human health.
Date of Acceptance: 17-Aug-2016
ISSN: 1751-7362
Publisher: Nature Publishing Group
Journal / Book Title: ISME Journal
Sponsor/Funder: University Of Virginia
Funder's Grant Number: Award No 5R01GM108501-02
Keywords: Microbiology
06 Biological Sciences
10 Technology
05 Environmental Sciences
Publication Status: Accepted
Appears in Collections:Division of Surgery
Faculty of Medicine

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