Structural motifs in primary oxidation products of palmitoyl-arachidonoyl-phosphatidylcholines by LC-MS/MS
Article first published online: 6 NOV 2013
Copyright © 2013 John Wiley & Sons, Ltd.
Journal of Mass Spectrometry
Volume 48, Issue 11, pages 1207–1216, November 2013
How to Cite
Reis, A., Domingues, P. and Domingues, M. R. M. (2013), Structural motifs in primary oxidation products of palmitoyl-arachidonoyl-phosphatidylcholines by LC-MS/MS. J. Mass Spectrom., 48: 1207–1216. doi: 10.1002/jms.3280
- Issue published online: 3 NOV 2013
- Article first published online: 6 NOV 2013
- Manuscript Accepted: 4 SEP 2013
- Manuscript Revised: 3 SEP 2013
- Manuscript Received: 4 JUN 2013
- oxidized phospholipids;
Oxidative modifications to phospholipids (OxPL) play a major role in modulating signaling events in inflammation and infection, and complete understanding on the induced biological effects can only be understood based on knowledge of the oxidative motifs present.
Specific neutral losses observed in tandem mass spectrometry data (LC-MS/MS) of primary peroxidation products in oxidized palmitoyl-arachidonoyl-phosphatidylcholines (OxPAPC) provide information on the prevailing structural motifs regarding the oxidized acyl carbon chain, the nature of oxidized group and the site of carbon oxidation. The higher hydrophobicity of hydroperoxides compared to di-hydroxy derivatives under reverse-phase conditions together with specific fragmentation patterns enabled the identification of 12 structurally different OxPAPC structural (di-hydroxy and hydroperoxide derivatives) and positional isomers as well as the presence of poly-hydroxy together with isoprostanes derivatives.
The fragmentation patterns described in quadrupole time-of-flight and linear ion trap instruments complement the m/z value and retention time parameters in the identification of oxidative composition in OxPAPC products becoming a valuable tool for the exploratory screening of oxidized phosphatidylcholines in OxPAPC extracts, distinction of native and modified PC isobaric structures in complex samples contributing to the increased understanding of redox lipidomics in inflammation and infection. Copyright © 2013 John Wiley & Sons, Ltd.