Imaging mass spectrometry for lipidomics

Matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) is a powerful tool that enables the simultaneous detection and identification of biomolecules in analytes. MALDI-imaging mass spectrometry (MALDI-IMS) is a two-dimensional MALDI-MS technique used to visualize the spatial distribution of biomolecules without extraction, purification, separation, or labeling of biological samples. This technique can reveal the distribution of hundreds of ion signals in a single measurement and also helps in understanding the cellular profile of the biological system. MALDI-IMS has already revealed the characteristic distribution of several kinds of lipids in various tissues. The versatility of MALDI-IMS has opened a new frontier in several fields, especially in lipidomics. In this review, we describe the methodology and applications of MALDI-IMS to biological samples. This article is part of a Special Issue entitled: Lipodomics and Imaging Mass Spectrometry.

Research Highligths
► MALDI-IMS is becoming an essential tool for molecular imaging of biological samples.
► It can facilitate the discovery of characteristic molecules in regions of interest.
► Here we showed that many great advances have already been made with MALDI-IMS.