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Updated: Jun 28, 2025

Author Spotlight: Quantification of Complex Lipidomic Samples Using Stable Isotope Labeling

Author Spotlight: Quantification of Complex Lipidomic Samples Using Stable Isotope Labeling

Published on: August 23, 2024

Aza-Prilezhaev Aziridination-Enabled通过高分辨率U形移动分析仪-质谱仪对异构脂质进行多维分析

Yuling Li¹, Yiming Wang¹, Kang Guo¹

¹Shimadzu Research Laboratory (Shanghai) Co., Ltd., Shanghai 201206, China.

Analytical chemistry

|April 22, 2024

概括

一种新的aza-Prilezhaev亚齐里丁化 (APA) 方法通过使用离子流动性质谱学来进行不和脂质的敏感检测和差异化来增强脂质组分析. 这种方法克服了传统脂质异构体识别技术的局限性.

科学领域:

利皮多米克 (Lipidomics) 是一种消化剂.
分析化学分析化学
生物化学生物化学

背景情况:

不和脂质对细胞功能至关重要,但难以全面分析.
现有的液体染色体协同质谱法 (LC-MS/MS) 方法难以标记双键和区分脂质异构体.
需要新的直角方法来改进脂质组概况.

研究的目的:

开发一种敏感的方法来分析不和脂质异体化.
为了克服当前脂质组分析技术的局限性.
为发现疾病标志物,使脂质组的深度分析成为可能.

主要方法:

一种没有金属和添加剂的aza-Prilezhaev阿齐里迪纳化 (APA) 反应,用于标记不和脂质.
离子移动性质谱仪 (IMS) 与U形移动性分析仪和UMA-QTOF MS相结合.
在MS/MS光谱和伪MS3模式下进行特定地点的碎片化分析.

主要成果:

用N-H阿齐里丁有效标记极性和非极性不和脂质.
信号强度提升至3个数量级,达到纳米分子 (nM) 检测极限.
双键位置和sn位置的识别,几何异构体的分化和脂质类别的分离.
由于占主导地位的单基化产物,简化了光谱,即使是具有多重双键的脂质.

结论:

开发的支持 APA 的 IMS 方法为深度脂质组分析提供了全面的解决方案.
这种技术显著提高了分析不和脂质及其同位素的灵敏度和特异性.
该方法有望在疾病监测和诊断中推进脂质标记物的发现.

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