Mass Spectrometry Imaging with Isomeric Resolution Enabled by Ozone-Induced Dissociation.
Mass spectrometry imaging (MSI) enables the spatial distributions of molecules possessing different mass-to-charge ratios to be mapped within complex environments revealing regional changes at the molecular level. Even at high mass resolving power, however, these images often reflect the summed distribution of multiple isomeric molecules, each potentially possessing a unique distribution coinciding with distinct biological function(s) and metabolic origin. Herein, this chemical ambiguity is addressed through an innovative combination of ozone-induced dissociation reactions with MSI, enabling the differential imaging of isomeric lipid molecules directly from biological tissues. For the first time, we demonstrate both double bond- and sn-positional isomeric lipids exhibit distinct spatial locations within tissue. This MSI approach enables researchers to unravel local lipid molecular complexity based on both exact elemental composition and isomeric structure directly from tissues.
['Paine|Martin R L|MRL|0000-0002-9360-1969', 'Poad|Berwyck L J|BLJ|0000-0002-0420-6116', 'Eijkel|Gert B|GB|', 'Marshall|David L|DL|0000-0002-1711-2338', 'Blanksby|Stephen J|SJ|0000-0002-8560-756X', 'Heeren|Ron M A|RMA|0000-0002-6533-7179', 'Ellis|Shane R|SR|0000-0002-3326-5991']
D000818:Animals D001940:Breast D006801:Humans D007536:Isomerism D008055:Lipids D010126:Ozone D021241:Spectrometry, Mass, Electrospray Ionization
mass spectrometry imaging biochemistry brain isomers phospholipids