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简单的一步脱甲基化-MALDI-MS/MS (OSDPM) 策略,用于结构测序的糖氨基甘油寡糖

Zhonghua Li¹, Yuxiao Zhang², Fan Bai³

¹Department of Biochemistry and Molecular Biology, NHC Key Laboratory of Glycoconjugate Research Ministry of Health, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China.

Analytical chemistry

|July 28, 2025

概括

一种新的单步化化-MALDI-MS/MS (OSDPM) 方法简化了氨酸和硫酸氨酸 (HP/HS) 的结构分析. 这种高通量策略为复杂的甘氨酸结构提供了ng级的灵敏度.

科学领域:

生物化学生物化学
葡萄糖科学 (Glycoscience) 是一种科学.
分析化学分析化学

背景情况:

肝素和肝素硫酸盐 (HP/HS) 呈现复杂的结构异质性,包括可变的硫化和表皮化.
这种复杂性挑战了传统的分析方法,通常需要大量的样本和大量的处理时间.
现有的技术限制了稀缺的HP/HS样本的分析.

研究的目的:

为HP/HS结构性特征制定简化,敏感和高通量分析策略.
为了克服目前用于分析复杂HP/HS结构的劳动密集型方法的局限性.
为了能够对少量HP/HS样品进行分析.

主要方法:

开发一个单阶段化-MALDI-MS/MS (OSDPM) 分析策略.
应用OSDPM用于HP/HS寡糖的高通量结构特征.
使用天然HP/HS甘氨酸和甘氨酸微阵列数据进行验证.

主要成果:

在HP/HS结构分析中,OSDPM可实现ng-到sub-μg级别的灵敏度.
该方法同时确定寡糖化合物组成,硫化模式,并区分GlcA2S/IdoA2S表皮.
从猪肠粘膜中成功表征了17种天然的HP/HS甘氨酸.

结论:

由于其简单性,灵敏性和效率,OSDPM策略为HP/HS结构性特征提供了有价值的解决方案.
这种方法显著推进了复杂的甘氨酸糖的分析.
促进研究HP/HS在生理和病理过程中的作用.

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