A detergent-free method for preparation of lipid rafts for the shotgun lipidomics study

Chao Qin, Meixia Pan, Xianlin Han

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Lipid rafts are microdomains on plasma membrane that contain high levels of cholesterol and sphingolipids. Because of the detergent-resistant property of lipid rafts, lipid rafts isolated by methods that use detergents frequently yield different results. Artifacts can also be introduced through the use of detergents. These limitations could be overcome with a detergent-free method which eliminates possible artificial influences. Importantly, lipid rafts prepared with a detergent-free method is more compatible to mass spectrometric analysis since the ion suppression effect is largely reduced. This chapter describes a detergent-free two-step method for preparation of lipid rafts. Firstly, a purified plasma membrane fraction is prepared from cells by sedimentation of the postnuclear supernatant (PNS) in a Percoll gradient. Secondly, the as-prepared plasma membranes are sonicated to release lipid rafts which are further isolated by flotation in a continuous gradient of Optiprep solution. Then, we introduce a typical shotgun lipidomics workflow that can be used as a cost-effective and relatively high throughput method to determine the lipidomes of lipid rafts. The method also makes an easy start for lipidomics studies.

Original languageEnglish (US)
Title of host publicationMethods in Molecular Biology
PublisherHumana Press
Pages27-35
Number of pages9
DOIs
StatePublished - 2021

Publication series

NameMethods in Molecular Biology
Volume2187
ISSN (Print)1064-3745
ISSN (Electronic)1940-6029

Keywords

  • Detergent-free preparation
  • Lipid rafts
  • Mass spectrometry
  • Plasma membrane
  • Shotgun lipidomics

ASJC Scopus subject areas

  • Molecular Biology
  • Genetics

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  • Cite this

    Qin, C., Pan, M., & Han, X. (2021). A detergent-free method for preparation of lipid rafts for the shotgun lipidomics study. In Methods in Molecular Biology (pp. 27-35). (Methods in Molecular Biology; Vol. 2187). Humana Press. https://doi.org/10.1007/978-1-0716-0814-2_2