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在FluoMALDI成像管道中,MALDI矩阵升华与喷涂相比

Tae-Hun Hahm¹, Wanyue Wang¹, Dalton R Brown¹

¹Applied Imaging Mass Spectrometry Core, Johns Hopkins University School of Medicine, Baltimore, MD, 21287, USA; Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD, 21287, USA.

Analytica chimica acta

|October 10, 2025

概括

这项研究通过比较矩阵沉积方法来改善组织自光和脂质检测来增强FluoMALDI管道. 诺哈曼矩阵和升华涂层为先进的MALDI成像应用提供一致的结果.

科学领域:

质谱仪成像成像质谱仪成像
光显微镜的光学显微镜.
生物分子分析.

背景情况:

在FluoMALDI管道集成的幻灯片扫描光显微镜 (SSFM) 与矩阵辅助激光溶解/电离 (MALDI) 成像.
这种整合针对自光组织结构进行增强分析.

研究的目的:

系统地比较FluoMALDI管道内的升华和喷涂矩阵沉积方法.
评估不同MALDI矩阵对组织自光增强的影响.
为了评估脂质检测效率和跨MALDI电离模式的空间分布.

主要方法:

在小鼠大脑,肝脏和脏组织上对六种MALDI矩阵 (9-aminoacridine,norharmane,α-cyano-4-hydroxycinnamic acid,2,5-dihydroxyacetophenone,2,5-dihydroxybenzoic acid,sinapinic acid) 的升华和喷涂进行比较.
在绿色,红色和远红色通道中对自发光增强的评估.
使用MALDI-1和MALDI-2电离模式评估脂质检测效率 (酸丁乙醇胺,酸丁胆).

主要成果:

诺哈曼矩阵在沉积方法中表现出一致的自光增强,具有最佳的通道特定性能.
矩阵晶体大小没有显著影响光增强.
升华通常比喷涂更高的脂检测效率,特别是对于PE和PC.
脂质的空间分布是一致的,但检测效率因矩阵,组织和电离模式而异.

结论:

矩阵选择和沉积方法对FluoMALDI成像中的组织自光,空间分辨率和脂质检测具有关键影响.
这些发现为优化基质沉积策略提供了指导,这些策略基于MALDI成像中的特定研究目标.

关键词:

自动光是一种自发光.这就是FluoMALDI.光是一种光效应.图像成像是一种成像.马尔迪马尔迪马尔迪马尔迪马尔迪二号 (Maldi-2) 是一个这是一个矩阵矩阵.显微镜的使用方法喷喷是一种喷方式.升华是为了升华.

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