Analysis of Glycosaminoglycan-derived Disaccharides by Capillary Electrophoresis Using Laser-induced Fluorescence Detection

Overview

Journal Anal Biochem

Publisher Elsevier

Specialty Biochemistry

Date 2012 May 22

PMID 22609076

Citations 12

Authors

Yuqing Chang

Bo Yang

Xue Zhao

Robert J Linhardt

Affiliations

Soon will be listed here.

Abstract

A quantitative and highly sensitive method for the analysis of glycosaminoglycan (GAG)-derived disaccharides that relies on capillary electrophoresis (CE) with laser-induced fluorescence detection is presented. This method enables complete separation of 17 GAG-derived disaccharides in a single run. Unsaturated disaccharides were derivatized with 2-aminoacridone to improve sensitivity. The limit of detection was at the attomole level and approximately 100-fold more sensitive than traditional CE-ultraviolet detection. A CE separation timetable was developed to achieve complete resolution and shorten analysis time. The relative standard deviations of migration time and peak areas at both low and high concentrations of unsaturated disaccharides are all less than 2.7 and 3.2%, respectively, demonstrating that this is a reproducible method. This analysis was successfully applied to cultured Chinese hamster ovary cell samples for determination of GAG disaccharides. The current method simplifies GAG extraction steps and reduces inaccuracy in calculating ratios of heparin/heparan sulfate to chondroitin sulfate/dermatan sulfate resulting from the separate analyses of a single sample.

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