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Live single-cell video-mass spectrometry for cellular and subcellular molecular detection and cell classification

机译:用于细胞和亚细胞分子检测和细胞分类的实时单细胞视频质谱法

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摘要

The molecular content from the cytoplasm of a live, single mammalian cell and its organelle were trapped with a nano-electrospray ionization (ESI) tip acting as a micropipette under a video microscope, and hundreds of small molecular peaks were detected by direct nano-ESI mass spectrometry (MS). Granuleor cytoplasm-specific peaks in a mast cell (RBL 2H3) model were extracted by paired t-test to demonstrate their specific localization. Some of the typical and specific molecules were successfully identified by MS/MS analysis. This method was also applied to the cell classification of seven types of cell lines at the single-cellular level by principal component analysis (PCA), revealing seven clusters in the multivariate score plot.
机译:在视频显微镜下,用充当微型移液器的纳米电喷雾电离(ESI)尖端捕获活的单个哺乳动物细胞及其细胞器的细胞质中的分子含量,并通过直接纳米ESI检测数百个小分子峰质谱(MS)。通过配对t检验提取肥大细胞(RBL 2H3)模型中的颗粒细胞质特异性峰,以证明其特异性定位。通过MS / MS分析成功鉴定出一些典型和特定的分子。通过主成分分析(PCA),该方法还应用于单细胞水平上的七种类型细胞系的细胞分类,揭示了多元评分图中的七个聚类。

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