An Efficient Single Phase Method for the Extraction of Plasma Lipids

Area of Science:

• Biochemistry
• Analytical Chemistry
• Metabolomics

Background:

• Lipidomics studies are crucial for understanding lipid metabolism in health and disease.
• High-throughput lipid extraction is essential for large-scale lipidomic analyses.
• Existing methods often use solvents incompatible with liquid chromatography electrospray ionization-tandem mass spectrometry (LC-ESI-MS/MS).

Purpose of the Study:

• To develop a fast, simple, and high-throughput lipid extraction method compatible with LC-ESI-MS/MS.
• To enable efficient quantification of a wide range of lipid species from biological samples.

Main Methods:

• Extraction of plasma lipids using a 1-butanol:methanol (1:1 v/v) solvent mixture with internal standards.
• Quantification of extracted lipids via positive-ion mode LC-ESI-MS/MS.
• Validation against a standard chloroform:methanol extraction method.

Main Results:

• Efficient extraction of all major lipid classes, including sterols, glycerolipids, glycerophospholipids, and sphingolipids.
• High recovery rates (>90%) and excellent reproducibility (%CV < 20%).
• Strong correlation (R2 = 0.976) with established extraction methods.
• Method is suitable for large-scale LC-ESI-MS/MS analyses, using non-halogenated solvents and requiring no drying/reconstitution steps.

Conclusions:

• The presented 1-butanol:methanol extraction method is a robust, efficient, and high-throughput solution for lipidomic analysis.
• This technique is well-suited for both research and clinical laboratories performing large-scale LC-ESI-MS/MS-based lipidomics.
• The method simplifies sample preparation and enhances compatibility with LC-ESI-MS/MS workflows.