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Updated: Jun 21, 2026
08:07
Sample Preparation for Single Cell Mass Spectrometry Metabolomics Studies: Combined Cell Washing, Quenching, Drying, and Storage
Published on: September 16, 2025
Live single-cell mass spectrometry.
1Graduate School of Biomedical Sciences, Hiroshima University, Japan. tsutomu@hiroshima-u.ac.jp
Summary
Live single-cell mass spectrometry (MS) advances bio-imaging by enabling exhaustive detection of previously unknown molecules within individual cells, overcoming limitations of existing methods.
Area of Science:
- Biotechnology
- Analytical Chemistry
- Cell Biology
Background:
- Current bio-imaging methods can only detect known molecules.
- Cells exhibit unique behaviors, necessitating methods to discover novel molecular markers.
- Existing single-cell mass spectrometry (MS) techniques have limitations in ionization and exhaustiveness.
Purpose of the Study:
- To review the evolution of bio-imaging towards live single-cell mass spectrometry (MS).
- To highlight the need for methods capable of discovering new molecules in individual cells.
- To present advancements in single-cell MS for comprehensive molecular profiling.
Main Methods:
- Review of historical bio-imaging techniques.
- Analysis of single-cell MALDI-TOF/MS limitations.
- Introduction of nano-electrospray ionization coupled with direct single-cell content extraction into MS.
- Development of key molecule extraction methods.
Main Results:
- Thousands of molecular peaks were successfully and exhaustively detected from single cells.
- A method for extracting key molecules from single cells was developed.
- The new nano-spray ionization MS method overcomes limitations of previous techniques.
Conclusions:
- Live single-cell MS, utilizing nano-spray ionization, provides exhaustive molecular detection.
- This advanced technique allows for the exploration of site- or state-specific molecules in cell dynamics.
- The method is broadly applicable to various cell biology research areas.
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