|Title||Analysis of omega-3 fatty acid derived N-acylethanolamines in biological matrices|
|Author(s)||Witkamp, Renger F.; Balvers, Michiel|
|Source||In: Endocannabinoid signaling: Methods and Protocols / Maccarrone, Mauro, Humana Press Inc. (Methods in Molecular Biology ) - ISBN 9781493935376 - p. 27 - 40.|
Chair Nutrition and Pharmacology (HNE)
|Publication type||Peer reviewed book chapter|
|Keyword(s)||Docosahexaenoylethanolamide - Eicosapentaenoylethanolamide - Endocannabinoids - LC-MS - N-3 fatty acids - Solid phase extraction|
The adequate quantification of endocannabinoids can be complex due to their low endogenous levels and structural diversity. Therefore, advanced analytical approaches, such as LC-MS, are used to measure endocannabinoids in plasma, tissues, and other matrices. Recent work has shown that endocannabinoids that are synthesized from n-3 fatty acids, such as docosahexaenoylethanolamide (DHEA) and eicosapentaenoylethanolamide (EPEA), have anti-inflammatory and anti-tumorigenic properties and stimulate synapse formation in neurites. Here, an LC-MS based method for the quantification of n-3 endocannabinoids DHEA and EPEA which is also suited to measure a wider spectrum of endocannabinoids is described. The chapter contains a step-by-step protocol for the analysis of n-3 endocannabinoids in plasma, including sample collection and solid phase extraction, LC-MS analysis, and data processing. Modifications to the protocol that allow quantifying n-3 endocannabinoids in tissues and cell culture media will also be discussed. Finally, conditions that alter endocannabinoid concentrations are briefly discussed.