在单细胞系统中通过双模式MALDI质谱成像对代谢物进行全面的分析
Jie Yuan1, Xiafei Li2,3, Xinxin Shen1,4
1Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China.
Analytical chemistry
|April 16, 2025
概括
这项研究引入了一种新的双模态质谱成像 (MSI) 方法,使用新的矩阵来增强单细胞代谢. 该技术改善了代谢物检测,并在细胞共同培养中揭示了不同的代谢概况.
科学领域:
- 生物技术是生物技术.
- 分析化学 分析化学
- 细胞生物学 细胞生物学
背景情况:
- 空间多组学,特别是矩阵辅助激光消耗/电离质谱成像 (MALDI-MSI),使单细胞代谢映射成为可能.
- 现有的MALDI-MSI方法在不同的电离模式中扎于矩阵干扰和有限的代谢物检测.
- 全面的单细胞代谢学对于理解细胞功能和疾病机制至关重要.
研究的目的:
- 开发一种新的双模态质谱成像 (MSI) 工作流程,以增强空间代谢.
- 为了改善代谢物覆盖率,并最大限度地减少单细胞分析中的矩阵干扰.
- 为了研究胆管癌和肝脏星状细胞的共同培养中的代谢区别.
主要方法:
- 开发了一种双模MSI工作流程,使用1,5-氨酸乙烯 (DAN) 和其盐 (DAN-HCl) 矩阵.
- 在正离子和负离子模式下进行了顺序检测,没有中间溶剂清洗.
- 该工作流应用于胆管癌细胞 (CCLP1) 和肝星状细胞 (LX2) 的共培养.
主要成果:
- 双模式方法显著提高了代谢物覆盖率,包括脂质和非脂质小分子.
- 在CCLP1和LX2细胞之间观察到糖脂和与能量相关的代谢物的不同积累.
- 检测到几种未识别的代谢物,这表明有可能进行新的代谢发现.
结论:
- 新的双模态MSI工作流提供了一个强大的方法,用于单细胞空间代谢学.
- 这种技术提供了增强的代谢物检测,并消除了矩阵干扰问题.
- 这些发现表明,该工作流在研究细胞相互作用和推进研究和临床应用方面具有广泛的适用性.
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