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交替电场辅助矩阵纳米涂层用于高空间分辨率的MALDI成像

Hua Guo^1,2, Jinming Li^1,2, Hao Hu^1,2

¹Key Laboratory of Mass Spectrometry Imaging and Metabolomics (Minzu University of China), State Ethnic Affairs Commission, Beijing, 100081, China.

|September 18, 2025

概括

一种新方法,交替电场辅助矩阵纳米涂层 (AEFAMnC),通过创建统一的纳米涂层和增强分析剂丰富,以更好地在现场探索生物化合物,从而改善高分辨率的MALDI成像.

科学领域:

分析化学分析化学
生物物理学的生物物理.
质谱测量质量谱测量

背景情况:

在探索内源化合物时,矩阵辅助激光消耗/电离质谱成像 (MALDI-MSI) 非常重要.
实现同时进行矩阵纳米涂层和现场分析剂丰富对于高分辨率成像至关重要.
目前的方法在统一的矩阵沉积和高效的分析剂丰富方面存在局限性.

研究的目的:

开发一种新的矩阵涂层方法,以提高MALDI-MSI的能力.
提高内部电离效率和内源性化合物的高分辨率成像.
在多样化的生物样本中证明新方法的多功能性.

主要方法:

开发了交替电场辅助矩阵纳米涂层 (AEFAMnC).
AEFAMnC利用不对称的交替电场进行重复的强制微提取.
这种方法应用于老鼠大脑,发芽的中国树种子和单细胞.

主要成果:

AEFAMnC实现了具有最小晶体大小 (大约2倍) 的矩阵纳米涂层. 70nm) 和优越的均沉积.
该方法通过重复的强制微提取显著增强了现场分析物缩.
提高了内源性化合物的电离效率和高分辨率 (5μm像素大小) 成像.

结论:

AEFAMnC同时实现了矩阵纳米涂层和现场分析剂丰富,这是MALDI-MSI的首次.
这种新的方法显著提高了高空间分辨率MALDI-MSI的性能.
AEFAMnC对高分辨率的MALDI成像具有重大意义,特别是在单细胞空间形态学中.

关键词:

交替电场是交替的电场.高分辨率的MALDI成像,使用高分辨率的图像.矩阵纳米涂层的使用.重复的强制微型提取.一个单细胞的单细胞.

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