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A Procedure for Solid-Phase Extractions Using Metal-Oxide-Coated Silica Column in Lipidomics
Hiroaki Takeda1,2, Manami Takeuchi1, Mayu Hasegawa3
1Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan.
Analytical Chemistry
|October 16, 2024
Summary
A new solid-phase extraction method effectively separates lipids for mass spectrometry, improving coverage and reproducibility in lipidomics. This technique enhances the detection of low-abundance lipids in biological samples.
Area of Science:
- Biochemistry
- Analytical Chemistry
- Mass Spectrometry
Background:
- Lipid enrichment is crucial for comprehensive analysis in mass spectrometry (MS)-based lipidomics.
- Existing methods may not fully capture the diversity of lipid molecules, especially minor subclasses.
Purpose of the Study:
- To develop a simple, stepwise solid-phase extraction (SPE) method for lipid fractionation.
- To enhance the coverage and reproducibility of lipid analysis in MS-based lipidomics.
Main Methods:
- Utilized a titanium- and zirconium-dioxide-coated silica SPE column for stepwise lipid separation.
- Fractionated lipids into neutral lipids, fatty acids/glycolipids, and phospholipids using specific solvent systems.
- Validated the method using untargeted lipidomics on human plasma and mouse tissues/feces.
Main Results:
- Achieved high average reproducibility (<10%) and near-complete coverage (∼100%) compared to non-SPE samples.
- Successfully characterized previously undetected minor lipid subclasses, including specific glycolipids and ganglioside derivatives.
- Demonstrated maximized value in glycolipidome profiling by removing interfering neutral lipids and phospholipids.
Conclusions:
- The developed SPE method offers efficient and reproducible lipid fractionation for enhanced MS-based lipidomics.
- This technique significantly improves the detection of low-abundance and complex lipids in various biological matrices.
- The method is particularly valuable for detailed glycolipidome analysis, providing deeper biological insights.
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