相关实验视频

Updated: May 13, 2026

Mass Spectrometric Analysis of Glycosphingolipid Antigens

Mass Spectrometric Analysis of Glycosphingolipid Antigens

Published on: April 16, 2013

通过MALDI-MSI检测脂体的批判性评估

Bo Chen, Ranjana Pathak, Albar Subekti

bioRxiv : the preprint server for biology

|February 20, 2025

概括

这项研究优化了用于脂检测的矩阵辅助激光脱离/电离质谱成像 (MALDI-MSI). 它建立了最佳实践,改善了癌症组织等生物样本中这些关键脂质的可视化.

科学领域:

利皮多米克 (Lipidomics) 是一种消化剂.
质谱仪成像成像质谱仪成像
生物化学生物化学

背景情况:

脂体在细胞 (病理) 生理学中起着关键作用,需要在组织中可视化它们.
通过MALDI-MSI检测脂质是具有挑战性的,因为结构多样性,碎片化和不同丰度水平.
现有的MALDI-MSI方法需要优化,以便进行可靠的脂分析.

研究的目的:

使用MALDI-MSI开发一个强大的螺旋脂检测管道.
通过MALDI-MSI建立最佳实践,并定义通过MALDI-MSI对脂体可视化的局限性.
在细胞培养和小鼠乳腺癌模型中验证优化的协议.

主要方法:

评估了使用脂基准标准的常见MALDI-MS矩阵 (DHA,DHB在正离子模式;DAN在负离子模式).
评估信号文物和复杂脂质的碎片化的矩阵性能.
在细胞培养中通过调节脂水平和在PyMT小鼠乳腺癌组织中验证了优化的协议.

主要成果:

通过在正离子模式下使用DHB来检测髓 (SM) 和氨酸 (Sph) 的最佳条件.
使用DAN在负离子模式中验证了胺和糖脂的检测.
记录了SM到S1P和C1P与DAN的广泛碎片化,导致人工C1P信号;证实没有S1P/C1P与DHB正离子模式的检测.

结论:

开发并验证了一个强大的MALDI-MSI管道用于脂可视化.
确定了特定脂类的最佳矩阵/离子模式组合,突出了潜在的碎片化工件.
这项研究提供了使用MALDI-MSI在生物样本中准确分析脂蛋白的基本准则.

更多相关视频

Dithranol as a Matrix for Matrix Assisted Laser Desorption/Ionization Imaging on a Fourier Transform Ion Cyclotron Resonance Mass Spectrometer

Dithranol as a Matrix for Matrix Assisted Laser Desorption/Ionization Imaging on a Fourier Transform Ion Cyclotron Resonance Mass Spectrometer

Published on: November 26, 2013

Quantitative and Qualitative Method for Sphingomyelin by LC-MS Using Two Stable Isotopically Labeled Sphingomyelin Species

Quantitative and Qualitative Method for Sphingomyelin by LC-MS Using Two Stable Isotopically Labeled Sphingomyelin Species

Published on: May 7, 2018

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...