A chip-based amide-HILIC LC/MS platform for glycosaminoglycan glycomics profiling.

A chip-based amide-HILIC LC/MS platform for glycosaminoglycan glycomics profiling.
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DOI:
10.1002/pmic.200701008
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发表时间:
2009-02
期刊:
影响因子:
3.4
通讯作者:
Zaia, Joseph
Zaia, Joseph
中科院分区:
生物学3区
文献类型:
--
作者:
Staples, Gregory O.;Bowman, Michael J.;Costello, Catherine E.;Hitchcock, Alicia M.;Lau, James M.;Leymarie, Nancy;Miller, Christine;Naimy, Hicham;Shi, Xiaofeng;Zaia, Joseph

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研究糖胺多聚糖(GAG)在生物系统中的功能作用的一个关键挑战是难以实现灵敏、稳定和可重复性的质谱分析。GAG是一种线型碳水化合物,其结构域在硫化、乙酰化和糖醛酸异构化的程度上有所不同。确定生物组织中GAG结构域结构的空间和时间变化尤为重要。为了分析来自组织的气体,将质谱仪与在线分离系统相结合是有用的。分离系统的目的既是为了去除抑制GAG电离的成分,也是为了能够分析非常复杂的混合物。本文介绍了以芯片为基础的酰胺-硅胶亲水相互作用层析(HILIC),用于肝素、硫酸肝素和软骨素/硫酸皮肤素GAG的LC/MS分析。芯片接口在负离子模式下产生了强大的性能,这对于GAG和其他酸性多糖类别是必不可少的,而内置的捕捉盒则减少了生物组织基质中的背景。HILIC层析分离是基于糖链长度和疏水性醋酸酯基团和酸性硫酸盐基团的数量的组合。总而言之,基于芯片的酰胺-HILIC LC/MS是一种能够用于GAG糖组分分析的技术。
A key challenge to investigations into the functional roles of glycosaminoglycans (GAGs) in biological systems is the difficulty in achieving sensitive, stable and reproducible mass spectrometric analysis. GAGs are linear carbohydrates with domains that vary in the extent of sulfation, acetylation and uronic acid epimerization. It is of particular importance to determine spatial and temporal variations of GAG domain structures in biological tissues. In order to analyze GAGs from tissue, it is useful to couple mass spectrometry with an on-line separation system. The purposes of the separation system are both to remove components that inhibit GAG ionization and to enable the analysis of very complex mixtures. This contribution presents amide-silica hydrophilic interaction chromatography (HILIC) in a chip-based format for LC/MS of heparin, heparan sulfate and chondroitin/dermatan sulfate GAGs. The chip interface yields robust performance in the negative ion mode that is essential for GAGs and other acidic glycan classes while the built-in trapping cartridge reduces background from the biological tissue matrix. The HILIC chromatographic separation is based on a combination of the glycan chain lengths and the numbers of hydrophobic acetate groups and acidic sulfate groups. In summary, chip based amide-HILIC LC/MS is an enabling technology for GAG glycomics profiling.
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