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Species variation in the fecal metabolome gives insight into differential gastrointestinal function

Saric, J. and Wang, Y. and Li, J. and Coen, M. and Utzinger, J. and Marchesi, J. R. and Keiser, J. and Veselkov, K. and Lindon, J. C. and Nicholson, J. K. and Holmes, E.. (2008) Species variation in the fecal metabolome gives insight into differential gastrointestinal function. Journal of Proteome Research, Vol. 7, H. 1. pp. 352-360.

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Official URL: http://edoc.unibas.ch/dok/A6007103

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Abstract

The metabolic composition of fecal extracts provides a window for elucidating the complex metabolic interplay between mammals and their intestinal ecosystems, and these metabolite profiles can yield information on a range of gut diseases. Here, the metabolites present in aqueous fecal extracts of humans, mice and rats were characterized using high-resolution (1)H NMR spectroscopy coupled with multivariate pattern recognition techniques. Additionally, the effects of sample storage and preparation methods were evaluated in order to assess the stability of fecal metabolite profiles, and to optimize information recovery from fecal samples. Finally, variations in metabolite profiles were investigated in healthy mice as a function of time. Interspecies variation was found to be greater than the variation due to either time or sample preparation. Although many fecal metabolites were common to the three species, such as short chain fatty acids and branched chain amino acids, each species generated a unique profile. Relatively higher levels of uracil, hypoxanthine, phenylacetic acid, glucose, glycine, and tyrosine amino acids were present in the rat, with beta-alanine being unique to the rat, and glycerol and malonate being unique to the human. Human fecal extracts showed a greater interindividual variation than the two rodent species, reflecting the natural genetic and environmental diversity in human populations. Fecal composition in healthy mice was found to change over time, which might be explained by altered gut microbial presence or activity. The systematic characterization of fecal composition across humans, mice, and rats, together with the evaluation of inherent variation, provides a benchmark for future studies seeking to determine fecal biomarkers of disease and/or response to dietary or therapeutic interventions.
Faculties and Departments:03 Faculty of Medicine > Bereich Medizinische Fächer (Klinik) > Klinische Pharmakologie
03 Faculty of Medicine > Departement Klinische Forschung > Bereich Medizinische Fächer (Klinik) > Klinische Pharmakologie
UniBasel Contributors:Keiser, Jennifer
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:American Chemical Society
ISSN:1535-3893
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:08 Nov 2012 16:23
Deposited On:08 Nov 2012 16:18

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