Gas chromatography/flame ionisation detection mass spectrometry for the detection of endogenous urine metabolites for metabonomic studies and its, use as a complementary tool to nuclear magnetic resonance spectroscopy

被引:34
|
作者
Fancy, Sally-Ann
Beckonert, Olaf
Darbon, Gareth
Yabsley, Warren
Walley, Rosalind
Baker, David
Perkins, George L.
Pullen, Frank S.
Rumpel, Klaus
机构
[1] Pfizer Global R&D, Sandwich CT13 9NJ, Kent, England
[2] Pfizer Global R&D, Michigan Labs, Ann Arbor, MI 48105 USA
关键词
D O I
10.1002/rcm.2583
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
Metabonomics is a relatively new field of research in which the total pool of metabolites in body fluids or tissues from different patient groups is subjected to comparative analysis. Nuclear magnetic resonance (NMR) spectroscopy is the technology that is currently most widely used for the analysis of these highly complex metabolite mixtures, and hundreds of metabolites can be detected without any upfront separation. We have investigated in this study whether gas chromatography (GC) separation in combination with flame ionisation detection (FID) and mass spectrometry (MS) detection can be used for metabolite profiling from urine. We show that although GC sample preparation is much more involved than for NMR, hundreds of metabolites can reproducibly be detected and analysed by GC. We show that the data quality is sufficiently high - particularly if appropriate baseline correction and time-warping methods are applied - to allow for data comparison by chemometrics methods. A sample set of urines from eleven healthy human volunteers was analysed independently by GC and NMR, and subsequent chemometrics analysis of the two datasets showed some similar features. As judged by NIST database searches of the GUMS data some of the major metabolites that are detected by NMR are also visible by GC/MS. Since in contrast to NMR every peak in GC corresponds to a single metabolite, the electron ionisation spectra can be used to quickly idenfify metabolites of interest if their reference spectra are present in a searchable database. In summary, we show that GC is a method that can be used as a complementary tool to NMR for metabolite profiling of urine samples. Copyright (c) 2006 John Wiley & Sons, Ltd.
引用
收藏
页码:2271 / 2280
页数:10
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