The analysis of cellular lipids and phospholipids has been of continuously increasing research interest due to the importance of these molecules in psychological process.In this work,a mass spectrometry-based method for direct,in situ analysis of lipids in cells was reported.Mammalian cells were directly cultured on ITO-coated glass and then analyzed by matrix-assisted laser desorption ionization-mass spectrometry(MALDI-MS).The matrix application process was achieved by electrospray coating,which produced a homogenous layer of matrix crystal on the sample.The detection results and reproducibility are satisfactory.With this method,a profile of abundant membrane lipids is generated,which is characteristic of cell type.In conclusion,this in situ MALDI-MS cellular lipid analysis method provides a platform for sensitive and robust molecular profiling of mammalian cells.
