微流控
分类
质量细胞仪
样品制备
细胞仪
单元格排序
单细胞分析
流式细胞术
质谱法
样品(材料)
人口
色谱法
纳米技术
计算机科学
材料科学
化学
细胞
分子生物学
生物
生物化学
基因
表型
人口学
社会学
程序设计语言
作者
Junwen Zhu,Siyuan Pan,Huichao Chai,Peng Zhao,Yongxiang Feng,Zhen Cheng,Sichun Zhang,Wenhui Wang
出处
期刊:Small
[Wiley]
日期:2024-03-14
卷期号:20 (26)
被引量:5
标识
DOI:10.1002/smll.202310700
摘要
Abstract Single‐cell mass spectrometry (MS) is significant in biochemical analysis and holds great potential in biomedical applications. Efficient sample preparation like sorting (i.e., separating target cells from the mixed population) and desalting (i.e., moving the cells off non‐volatile salt solution) is urgently required in single‐cell MS. However, traditional sample preparation methods suffer from complicated operation with various apparatus, or insufficient performance. Herein, a one‐step sample preparation strategy by leveraging label‐free impedance flow cytometry (IFC) based microfluidics is proposed. Specifically, the IFC framework to characterize and sort single‐cells is adopted. Simultaneously with sorting, the target cell is transferred from the local high‐salinity buffer to the MS‐compatible solution. In this way, one‐step sorting and desalting are achieved and the collected cells can be directly fed for MS analysis. A high sorting efficiency (>99%), cancer cell purity (≈87%), and desalting efficiency (>99%), and the whole workflow of impedance‐based separation and MS analysis of normal cells (MCF‐10A) and cancer cells (MDA‐MB‐468) are verified. As a standalone sample preparation module, the microfluidic chip is compatible with a variety of MS analysis methods, and envisioned to provide a new paradigm in efficient MS sample preparation, and further in multi‐modal (i.e., electrical and metabolic) characterization of single‐cells.
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