title: Liquid ionic matrixes for MALDI mass spectrometry imaging of lipids.
abstract: Lipids are a major component of cells and play a variety of roles in organisms. In general, they play a key role in the structural composition of membranes. Some lipids, such as sphingoglycolipids, however, are also mediators of different biological processes, including protein transport, regulation of cell growth, cellular morphogenesis, neuronal plasticity, and regulation of the immune response. With the advent of MALDI mass spectrometry imaging (MALDI MSI), lipids have begun to be intensively investigated by several groups. Here we present a novel development in the detection and study of lipids using an automatic microspotter coupled to specific liquid ionic matrixes based on a 2,5-DHB matrix (i.e., 2,5-DHB/ANI, 2,5-DHB/Pyr, and 2,5-DHB/3-AP). This development allows to decrease the time of the sample preparation by comparison with crystalline 2,5-DHB as matrix and was validated on human ovarian cancer biopsies to demonstrate its use as a precise procedure that is particularly useful for specific diagnoses.
authors.affiliation: University Lille Nord de France, F-59000 Lille, France.
authors.forename: Céline
authors.initials: C
authors.lastname: Meriaux
authors.forename: Julien
authors.initials: J
authors.lastname: Franck
authors.forename: Maxence
authors.initials: M
authors.lastname: Wisztorski
authors.forename: Michel
authors.initials: M
authors.lastname: Salzet
authors.forename: Isabelle
authors.initials: I
authors.lastname: Fournier
mesh_terms: D000818:Animals; D001706:Biopsy / Q000379:methods; D001921:Brain / Q000378:metabolism; D005260:Female; D020869:Gene Expression Profiling; D006028:Glycosphingolipids / Q000737:chemistry; D006801:Humans; D007107:Immune System; D008055:Lipids / Q000737:chemistry*; D010051:Ovarian Neoplasms / Q000378:metabolism*; D010053:Ovary / Q000378:metabolism; D011506:Proteins / Q000378:metabolism; D040901:Proteomics / Q000379:methods*; D051381:Rats; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization / Q000379:methods*
chemical_list: D006028:Glycosphingolipids; D008055:Lipids; D011506:Proteins