The metabonomics of aging and development in the rat: an investigation into the effect of age on the profile of endogenous metabolites in the urine of male rats using 1H NMR and HPLC-TOF MS.

Journal article

The effect of aging and development in male Wistar-derived rats on the profile of endogenous metabolites excreted in the urine was investigated using both (1)H NMR spectroscopy and HPLC-TOF MS using electrospray ionisation (ESI). The endogenous metabolites were profiled in samples collected from male rats every two weeks from just after weaning at 4 weeks up to 20 weeks of age. Multivariate data analysis enabled clusters to be visualised within the data according to age, with urine collected at 4 and 6 weeks showing the greatest differences by both analytical techniques. Markers detected by (1)H NMR spectroscopy included creatinine, taurine, hippurate and resonances associated with amino acids/fatty acids, which increased with age, whilst citrate and resonances resulting from glucose/myoinositol declined. A number of ions were detected by HPLC-MS that were only present in urine samples at 4 weeks of age in both positive and negative ESI, with a range of ions, including e.g. carnitine, increasing with age. Age predictions by PLS-regression modelling demonstrated an age-related trend within these data, between 4 and 12 weeks for HPLC-MS and 4-16 weeks for NMR. The possible utility of these techniques for metabonomic investigations of age-related changes in the rat is discussed and the importance of employing suitable control animals in pharmacological and toxicological studies is highlighted.

Authors: Williams, R; Lenz, E; Lowden, J; Rantalainen, M; Wilson, I

• Publication status: Published
• Journal: Molecular bioSystems
• Volume: 1
• Issue: 2
• Pages: 166-175
• Publication date: 2005-07-01
• DOI: 10.1039/b500852b
• EISSN: 1742-2051
• ISSN: 1742-206X
• Language: English
• Keywords: Inositol; Hippurates; Citrates; Chromatography, High Pressure Liquid; Animals; Energy Metabolism; Aging; Taurine; Creatinine; Spectrometry, Mass, Electrospray Ionization; Rats; Magnetic Resonance Spectroscopy; Male; Rats, Wistar