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Quantitative lipoxygenase product profiling by gas chromatography negative-ion chemical ionization mass spectrometry

An assay for the quantitative determination of the hydroxylation profile of long-chain fatty acids is described for gas chromatography negative-ion chemical ionization mass spectrometry and stable isotope dilution using [carboxyl-18O2]-labeled internal standards. The assay has been applied to the st...

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Bibliographic Details
Main Authors: Lehmann, Wolf-Dieter (Author) , Metzger, Karl (Author) , Stephan, Michael (Author) , Wittig, Ulrike (Author) , Zalán, Ildikó (Author) , Habenicht, Andreas (Author) , Fürstenberger, Gerhard (Author)
Format: Article (Journal)
Language:English
Published: January 1995
In: Analytical biochemistry
Year: 1995, Volume: 224, Issue: 1, Pages: 227-234
ISSN:1096-0309
DOI:10.1006/abio.1995.1034
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1006/abio.1995.1034
Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/S0003269785710342
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Author Notes:Wolf D. Lehmann, Karl Metzger, Michael Stephan, Ulrike Wittig, Ildikó Zalan, Andreas J.R. Habenicht, and Gerhard Fürstenberger
Description
Summary:An assay for the quantitative determination of the hydroxylation profile of long-chain fatty acids is described for gas chromatography negative-ion chemical ionization mass spectrometry and stable isotope dilution using [carboxyl-18O2]-labeled internal standards. The assay has been applied to the study of fatty acids isolated from body fluids, tissue, and cultured cells. Examples for the analyses of biological systems expressing 5-, 8-, 12-, or 15-lipoxygenase activity are given and the most important sources of analytical errors are addressed. Increased specificity compared to analysis by negative-ion chemical ionization, at the cost of sensitivity, can be achieved by the use of positive-ion electron impact ionization for the investigation of hydrogenated pentafluorobenzylester/trimethylsilylether derivatives. The method described provides complete, specific, and quantitative profiles of hydroxylated fatty acids originally present in biological samples or generated in vitro by incubation with polyunsaturated fatty acid substrates such as linoleic or arachidonic acid.
Item Description:Elektronische Reproduktion der Druck-Ausgabe 25. Mai 2002
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Physical Description:Online Resource
ISSN:1096-0309
DOI:10.1006/abio.1995.1034

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