Systemic multicompartmental effects of the gut microbiome on mouse metabolic phenotypes |
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| Authors: | Sandrine P Claus Tsz M Tsang Yulan Wang Olivier Cloarec Eleni Skordi François‐Pierre Martin Serge Rezzi Alastair Ross Sunil Kochhar Elaine Holmes Jeremy K Nicholson |
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| Institution: | 1. SORA Division, Department of Biomolecular Medicine, Imperial College London, London, UK;2. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Centre for Magnetic Resonance, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan, PR, China;3. BioAnalytical Science Department, Nestlé Research Center, Lausanne, Switzerland |
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| Abstract: | To characterize the impact of gut microbiota on host metabolism, we investigated the multicompartmental metabolic profiles of a conventional mouse strain (C3H/HeJ) (n=5) and its germ‐free (GF) equivalent (n=5). We confirm that the microbiome strongly impacts on the metabolism of bile acids through the enterohepatic cycle and gut metabolism (higher levels of phosphocholine and glycine in GF liver and marked higher levels of bile acids in three gut compartments). Furthermore we demonstrate that (1) well‐defined metabolic differences exist in all examined compartments between the metabotypes of GF and conventional mice: bacterial co‐metabolic products such as hippurate (urine) and 5‐aminovalerate (colon epithelium) were found at reduced concentrations, whereas raffinose was only detected in GF colonic profiles. (2) The microbiome also influences kidney homeostasis with elevated levels of key cell volume regulators (betaine, choline, myo‐inositol and so on) observed in GF kidneys. (3) Gut microbiota modulate metabotype expression at both local (gut) and global (biofluids, kidney, liver) system levels and hence influence the responses to a variety of dietary modulation and drug exposures relevant to personalized health‐care investigations. |
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