Article (Scientific journals)
Dual-polarity SALDI FT-ICR MS imaging and Kendrick mass defect data filtering for lipid analysis
Müller, Wendy; Verdin, Alexandre; Kune, Christopher et al.
2021In Analytical and Bioanalytical Chemistry, 413 (10), p. 2821–2830
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Keywords :
SALDI; Mass spectrometry imaging; Nanoparticles; Dual-polarity; Lipidomics; Kendrick mass defect; FT-ICR
Abstract :
[en] Lipids are biomolecules of crucial importance involved in critical biological functions. Yet, lipid content determination using mass spectrometry is still challenging due to their rich structural diversity. Preferential ionisation of the different lipid species in the positive or negative polarity is common, especially when using soft ionisation mass spectrometry techniques. Here, we demonstrate the potency of a dual-polarity approach using surface-assisted laser desorption/ionisation coupled to Fourier transform-ion cyclotron resonance (SALDI FT-ICR) mass spectrometry imaging (MSI) combined with Kendrick mass defect data filtering to (i) identify the lipids detected in both polarities from the same tissue section and (ii) show the complementarity of the dual-polarity data, both regarding the lipid coverage and the spatial distributions of the various lipids. For this purpose, we imaged the same mouse brain section in the positive and negative ionisation modes, on alternate pixels, in a SALDI FT-ICR MS imaging approach using gold nanoparticles (AuNPs) as dual-polarity nanosubstrates. Our study demonstrates, for the first time, the feasibility of (i) a dual-polarity SALDI-MSI approach on the same tissue section, (ii) using AuNPs as nanosubstrates combined with a FT-ICR mass analyser and (iii) the Kendrick mass defect data filtering applied to SALDI-MSI data. In particular, we show the complementarity in the lipids detected both in a given ionisation mode and in the two different ionisation modes.
Research center :
MolSys - Molecular Systems - ULiège
Mass Spectrometry Laboratory
Disciplines :
Chemistry
Author, co-author :
Müller, Wendy  ;  Université de Liège - ULiège > Département de chimie (sciences) > Chimie analytique inorganique
Verdin, Alexandre  ;  Université de Liège - ULiège > Département de chimie (sciences) > Chimie analytique inorganique
Kune, Christopher  ;  Université de Liège - ULiège > Département de chimie (sciences) > Laboratoire de spectrométrie de masse (L.S.M.)
Far, Johann  ;  Université de Liège - ULiège > Département de chimie (sciences) > Chimie analytique inorganique
De Pauw, Edwin  ;  Université de Liège - ULiège > Département de chimie (sciences) > Chimie analytique inorganique
Malherbe, Cédric ;  Université de Liège - ULiège > Département de chimie (sciences) > Chimie analytique inorganique
Eppe, Gauthier  ;  Université de Liège - ULiège > Département de chimie (sciences) > Chimie analytique inorganique
Language :
English
Title :
Dual-polarity SALDI FT-ICR MS imaging and Kendrick mass defect data filtering for lipid analysis
Publication date :
2021
Journal title :
Analytical and Bioanalytical Chemistry
ISSN :
1618-2642
eISSN :
1618-2650
Publisher :
Springer, Germany
Special issue title :
Mass Spectrometry Imaging 2.0
Volume :
413
Issue :
10
Pages :
2821–2830
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
FEDER - Fonds Européen de Développement Régional [BE]
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