Lipid Science & Technology

Biography

Biography: Malin L Nording

Abstract

Profiling the oxylipin and   endocannabinoid   lipidome requires highly senstive, precise and robust methods, which can be accomodated by the use of liquid chromatography (LC) combined with tandem mass spectrometry (MS/MS) methods. We have deve loped several LC-MS/MS protocols for these  bioactive lipids  from different fatty acid precursors, mai  nly arachidonic and linoleic acid, but also from eicosapentaenoic and docosahexaenoic acid, as well as from other fatty acids. Orginally, we employed separate extraction protocols for each family of bioactive lipid (oxylipins and endocannabinoids, respectively), and also different LC-MS/MS equipments. But for application in  clinical studies, it is more convenient to combine the analytical procedures for oxylipins and endocannabinoids in order to cover a larger portion of the lipidome in one single LC-MS/MS injection and preceeding sample extraction. It would allow for smaller sample volumes and less labour intensive work procedures. However, combined analysis of oxylipins and endocannabinoids is a challenging task, partly due to the different modes used for optimal ionization, negative for oxylipins and positive for endocannabinoids. Furthermore, the extraction solvents, mobile phases etc are not identical, so modifications of the previous (separate) protocols were necessary. I will describe our work towards combined analysis of oxylipins and endocannabinoids, which we currently have in place at the Swedish Metabolomics Centre in Umeå. Cruicial steps in the workflow will be highlighted and examples of succesful applications will be given