Compositional analysis of glycosaminoglycans by electrospray mass spectrometry

被引:124
作者
Zaia, J [1 ]
Costello, CE [1 ]
机构
[1] Boston Univ, Sch Med, Dept Biochem, Mass Spectrometry Resource, Boston, MA 02118 USA
关键词
D O I
10.1021/ac000777a
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
The purpose of this work is to analyze glycosaminoglycans (GAGs) directly from complex mixtures without the need to purify individual components. Navel conditions for negative ion electrospray MS of chondroitin sulfate (CS) oligosaccharides are described in which sodium adduction and fragmentation are avoided. Differentiation between positional sulfation isomers is demonstrated for CS disaccharides, and a selected reaction monitoring scheme is used to quantify sulfation isomers in disaccharides Liberated from decorin and biglycan. A size exclusion chromatography LC/MS method is shown to be effective for compositional analysis of longer CS oligosaccharides. The SEC step serves to simplify the composition of GAGs entering the mass spectrometer at any time, thus allowing the masses of the constituent molecules to be extracted. Mass spectrometric detection produces far more information than conventional UV or fluorescent detectors and allows the monosaccharide composition of individual components to be determined.
引用
收藏
页码:233 / 239
页数:7
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