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Updated: Jul 12, 2026
07:46
Sheathless Capillary Electrophoresis–Mass Spectrometry for Metabolic Profiling of Biological Samples
Published on: October 1, 2016
Analyte-Class-Dependent Electrophoretic Organization Enables Single-Run Proteome-Metabolome Analysis by CE-ESI-MS.
Biorxiv : the Preprint Server for Biology
|July 10, 2026
Summary
Capillary electrophoresis (CE) enables single-run proteome-metabolome analysis from limited samples. This method organizes analytes by class, allowing simultaneous detection of proteins and metabolites without sample splitting.
Area of Science:
- Analytical Chemistry
- Biochemistry
- Molecular Biology
Background:
- Dual proteome-metabolome measurements are crucial for biological insights but challenging with limited samples.
- Current methods often require sample splitting or sequential analysis, leading to material loss and reduced efficiency.
- Electrospray ionization mass spectrometry (ESI-MS) is a common technique, but integrating different analyte classes can be difficult.
Purpose of the Study:
- To develop a single-run workflow for simultaneous proteome-metabolome analysis from limited biological samples.
- To leverage capillary electrophoresis (CE) for intrinsic analyte separation based on charge and size.
- To enable class-resolved tandem mass spectrometry (MS) acquisition within a single analytical run.
Main Methods:
- Developed a capillary electrophoresis-electrospray ionization mass spectrometry (CE-ESI-MS) workflow for integrated analysis.
- Utilized the inherent electrophoretic organization of singly charged small molecules and multiply charged peptides.
- Implemented charge- and m/z-resolved precursor selection for class-resolved tandem MS acquisition.
- Processed samples in a single vial to minimize material loss.
Main Results:
- The CE-ESI-MS workflow successfully detected all spiked amino acids and preserved proteomic depth in a HeLa digest.
- In single Xenopus laevis blastomeres, the method identified 86 metabolite features and over 1,000 protein groups per cell.
- Paired proteome-metabolome data revealed cell-type-specific molecular differences and enabled pathway analysis.
Conclusions:
- Analyte-class-dependent electrophoretic organization coupled with class-resolved MS acquisition provides a basis for single-run proteome-metabolome analysis.
- This CE-ESI-MS approach is suitable for material-limited samples, such as single cells.
- The method facilitates comprehensive molecular profiling and the study of cell-type-specific biological variations.
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