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Título: | Characterization of complex lipid mixtures in contaminant exposed JEG-3 cells using liquid chromatography and high-resolution mass spectrometry |
Autor: | Gorrochategui, Eva CSIC ORCID; Casas, Josefina CSIC ORCID ; Pérez-Albaladejo, Elisabet CSIC ORCID; Jáuregui, Olga; Porte Visa, Cinta CSIC ORCID ; Lacorte Bruguera, Silvia CSIC ORCID | Palabras clave: | JEG-3 cells Lipidomics Mass spectrometry Perfluorinated chemicals (PFCs) Time-of-flight and orbitrap analyzers Tributyltin (TBT) |
Fecha de publicación: | 2014 | Editor: | Springer Nature | Citación: | Environmental Science and Pollution Research | Resumen: | The aim of this study was to develop a method based on ultra high performance liquid chromatography coupled with mass spectrometry (UHPLC-MS) for lipid profiling in human placental choriocarcinoma (JEG-3) cells. Lipids were solid–liquid extracted from JEG-3 cells using a solution of chloroform/methanol (2:1, v/v) in a simple procedure requiring minimal sample alteration. Simultaneous separation of complex lipid mixtures in their major classes was achieved with a reversed-phase (C8) UHPLC column and a mobile phase containing methanol with 1 mM ammonium formate and 0.2 % formic acid (A)/water with 2 mM ammonium formate and 0.2 % formic acid (B). Lipids were characterized using time-of-flight (TOF) and Orbitrap under full scan and positive electrospray ionization mode with both analyzers. A total of 178 species of lipids, including 37 phosphatidylcholines (PC), 32 plasmalogen PC, 9 lyso PC, 4 lyso plasmalogen PC, 30 triacylglycerols, 22 diacylglycerols, 7 cholesterol esters, 25 phosphatidylethanolamines, and 12 sphingomyelins, were identified using TOF and Orbitrap. The identification of all lipid classes was based on exact mass characterization with an error < 5 ppm. The developed methodology was applied to study lipid alterations in human placental cells against the exposure to perfluorinated chemicals (PFCs) and tributyltin (TBT). | Versión del editor: | DOI: 10.1007/s11356-014-3172-5 | URI: | http://hdl.handle.net/10261/128179 | DOI: | 10.1007/s11356-014-3172-5 |
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