Non-invasive monitoring of microbiota and host metabolism using secondary electrospray ionization-mass spectrometry
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Date
2023-08-28
Publication Type
Journal Article
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Abstract
The metabolic “handshake” between the microbiota and its mammalian host is a complex, dynamic process with major influences on health. Dissecting the interaction between microbial species and metabolites found in host tissues has been a challenge due to the requirement for invasive sampling. Here, we demonstrate that secondary electrospray ionization-mass spectrometry (SESI-MS) can be used to non-invasively monitor metabolic activity of the intestinal microbiome of a live, awake mouse. By comparing the headspace metabolome of individual gut bacterial culture with the “volatilome” (metabolites released to the atmosphere) of gnotobiotic mice, we demonstrate that the volatilome is characteristic of the dominant colonizing bacteria. Combining SESI-MS with feeding heavy-isotope-labeled microbiota-accessible sugars reveals the presence of microbial cross-feeding within the animal intestine. The microbiota is, therefore, a major contributor to the volatilome of a living animal, and it is possible to capture inter-species interaction within the gut microbiota using volatilome monitoring.
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published
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Journal / series
Volume
3 (8)
Pages / Article No.
100539
Publisher
Cell Press
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Subject
secondary electrospray ionization; volatile metabolites; metabolomics; gut microbiota; isotopic labeling
Organisational unit
09640 - Slack, Emma (ehemalig) / Slack, Emma (former)
03430 - Zenobi, Renato / Zenobi, Renato
Notes
Funding
185128 - How to resolve dysbiosis: Understanding and manipulating mechanisms of T cell-microbiota crosstalk (SNF)
-180575 - NCCR Microbiomes SNF (SNF)
-180575 - NCCR Microbiomes SNF (SNF)
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