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在脑瘤中可视化小分子和脂质的矩阵选择,使用非向的MALDI-TOF质谱成像

Tianyao Lu^1,2, Lutz Freytag¹, Vinod K Narayana³

¹Personalised Oncology Division, The Walter and Eliza Hall Institute of Medical Research, Melbourne 3052, Australia.

|November 24, 2023

概括

这项研究优化了用于大脑癌症研究的矩阵辅助激光消耗/电离质谱成像. 重结晶的α-cyano-4-hydroxycinnamic酸具有正极性,在瘤微环境中检测到的最佳代谢物.

科学领域:

代谢学代谢学代谢学
质谱仪成像成像质谱仪成像
癌症研究癌症研究

背景情况:

矩阵辅助激光脱/电离质谱成像 (MALDI-MSI) 对于研究脑癌微环境中的代谢活性至关重要.
在MALDI-MSI中检测代谢物高度依赖于矩阵选择,沉积技术和极性设置.

研究的目的:

为了比较不同矩阵,沉积技术和MALDI-MSI在大脑癌症中极性的性能.
为空间代谢学研究建立一个最佳的工作流.

主要方法:

在两种物种的两种脑癌类型中评估了三种矩阵,两种沉积技术和正/负极性.
使用液体染色学-质谱学和RNA测序进行代谢物和酶分析,证实了最佳条件.

主要成果:

重结晶的α-cyano-4-hydroxycinnamic酸矩阵具有正极性,在代谢物检测和一致性方面表现出卓越的性能.
确定了最佳的MALDI-MSI参数,用于分析脑瘤中的脂质和小分子丰度.

结论:

优化的MALDI-MSI工作流改善了对脑癌代谢的研究.
这种方法为在空间代谢学研究中选择最佳矩阵提供了可概括的方法.

关键词:

马尔迪-托夫 (MALDI-TOF) 是一个大气压力大气压力大气压力大脑癌症大脑癌症质瘤质瘤是一种矩阵选择选择矩阵选择

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相关概念视频

MALDI-TOF Mass Spectrometry

MALDI-TOF Mass Spectrometry

Mass spectrometry is a powerful characterization technique that can identify and separate a wide variety of compounds ranging from chemical to biological entities, based on their mass-to-charge ratio (m/z). The instruments that allow this detection, known as mass spectrometers, have three components: an ion source, a mass analyzer, and a detector. These spectrometers differ based on the nature of their ion source and analyzers.
Matrix-assisted laser desorption ionization (MALDI) is a commonly...