Journal
JOURNAL OF LIPID RESEARCH
Volume 55, Issue 8, Pages 1797-1809Publisher
ELSEVIER
DOI: 10.1194/jlr.D050302
Keywords
lipidomics; lipid extraction; mass spectrometry; ganglioside; glycerolipid; sphingolipid
Categories
Funding
- National Institutes of Health [GM103508, EY016077]
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Lipid extraction using a monophasic chloroform/methanol/water mixture, coupled with functional group selective derivatization and direct infusion nano-ESI-high-resolution/accurate MS, is shown to facilitate the simultaneous analysis of both highly polar and nonpolar lipids from a single retina lipid extract, including low abundance highly polar ganglioside lipids, nonpolar sphingolipids, and abundant glycerophospholipids. Quantitative comparison showed that the monophasic lipid extraction method yielded similar lipid distributions to those obtained from established gold standard biphasic lipid extraction methods known to enrich for either highly polar gangliosides or nonpolar lipids, respectively, with only modest relative ion suppression effects. This improved lipid extraction and analysis strategy therefore enables detailed lipidome analyses of lipid species across a broad range of polarities and abundances, from minimal amounts of biological samples and without need for multiple lipid class-specific extractions or chromatographic separation prior to analysis.
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