Quantification of signaling lipids by nano-electrospray ionization tandem mass spectrometry (Nano-ESI MS/MS)

• Verfasst von: Haag, Mathias [VerfasserIn]
• Verfasst von: Sachsenheimer, Timo [VerfasserIn]
• Verfasst von: Brügger, Britta [VerfasserIn]
• Titel: Quantification of signaling lipids by nano-electrospray ionization tandem mass spectrometry (Nano-ESI MS/MS)
• Verf.angabe: Mathias Haag, Angelika Schmidt, Timo Sachsenheimer, Britta Brügger
• E-Jahr: 2012
• Jahr: 16 January 2012
• Umfang: 20 S.
• Fussnoten: Gesehen am 24.08.2018
• Titel Quelle: Enthalten in: Metabolites
• Ort Quelle: Basel : MDPI, 2011
• Jahr Quelle: 2012
• Band/Heft Quelle: 2(2012), 1, Seite 57-76
• ISSN Quelle: 2218-1989
• DOI: doi:10.3390/metabo2010057
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: diacylglycerol
• Sach-SW: lipidomics
• Sach-SW: nano-electrospray ionization tandem mass spectrometry
• Sach-SW: phosphoinositides
• Sach-SW: signaling lipids
• Sach-SW: T cell signaling
• K10plus-PPN: 1580380379

Abstract

Lipids, such as phosphoinositides (PIPs) and diacylglycerol (DAG), are important signaling intermediates involved in cellular processes such as T cell receptor (TCR)-mediated signal transduction. Here we report identification and quantification of PIP, PIP2 and DAG from crude lipid extracts. Capitalizing on the different extraction properties of PIPs and DAGs allowed us to efficiently recover both lipid classes from one sample. Rapid analysis of endogenous signaling molecules was performed by nano-electrospray ionization tandem mass spectrometry (nano-ESI MS/MS), employing lipid class-specific neutral loss and multiple precursor ion scanning for their identification and quantification. Profiling of DAG, PIP and PIP2 molecular species in primary human T cells before and after TCR stimulation resulted in a two-fold increase in DAG levels with a shift towards 1-stearoyl-2-arachidonoyl-DAG in stimulated cells. PIP2 levels were slightly reduced, while PIP levels remained unchanged.