用基本蓝色染色组织7:用于MALDI质谱成像的新双极性矩阵
Michal Javorek1, Michal Hendrych2,3, Kateřina Ondráková1
1Department of Chemistry, Faculty of Science, Masaryk University, Brno 625 00, Czech Republic.
Analytical chemistry
|January 30, 2025
概括
一种新的矩阵辅助激光脱/电离质谱 (MALDI MS) 制备方法使用基本蓝色7 (BB7) 染料进行增强的脂质成像. 这种简单的染色技术提高了可复制性和图像质量,特别是在负离子模式下.
科学领域:
- 分析化学 分析化学
- 生物化学 生物化学
- 组织病理学 组织病理学
背景情况:
- 矩阵辅助激光脱/电离质谱成像 (MALDI MSI) 需要精心准备样本以获得高质量的数据.
- 目前的MALDI矩阵应用方法通常涉及昂贵和复杂的设备,如喷涂或升华涂层.
- 在MALDI MSI中,可复制性在很大程度上取决于矩阵应用的一致性.
研究的目的:
- 为 MALDI MSI 引入一个新的,简单的,且具有成本效益的双极性矩阵.
- 评估基本蓝7 (BB7) 作为生物组织脂质成像矩阵的性能.
- 在图像质量和可复制性方面,比较BB7与传统的MALDI矩阵.
主要方法:
- 开发一种使用MALDI MSI基本蓝7 (BB7) 染料溶液的新型样品制备协议.
- 应用BB7染色方法对小鼠大脑组织段的应用.
- 使用亚大气压MALDI源加上轨道陷质谱仪在正阴离子模式下分析脂质配置.
- 与传统矩阵 (如2,5-二基酸 (DHB) 和1,5-二氨甲 (DAN)) 进行BB7性能比较.
主要成果:
- BB7矩阵允许通过简单的组织浸泡进行快速和简单的样品制备,从而消除了对专用设备的需求.
- BB7表现出色,特别是在负离子模式下,为各种脂类产生低背景信号和高信号强度.
- 在 MALDI MSI 分析之前,染色的组织部分可以进行视觉检查和基本的组织病理学注释.
- 基于BB7的MALDI MSI实现了高图像质量和可重现的结果,与传统矩阵相比或优于传统矩阵.
结论:
- 基本蓝色7 (BB7) 是MALDI MSI的可行且有利的双极性矩阵,简化了样本准备.
- BB7染色方法为传统的矩阵应用技术提供了具有成本效益和可重复性的替代方案.
- 这种方法具有自动化和高空间分辨率MALDI MSI的潜力,将他的病理学见解与分子成像相结合.
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