Analytical and Bioanalytical Chemistry

, Volume 401, Issue 1, pp 115–125

MALDI-MS imaging of lipids in ex vivo human skin

Authors

  • Philippa J. Hart
    • Biomedical Research CentreSheffield Hallam University
  • Simona Francese
    • Biomedical Research CentreSheffield Hallam University
  • Emmanuelle Claude
    • Waters Corporation, Atlas Business Park, Simonsway
  • M. Nicola Woodroofe
    • Biomedical Research CentreSheffield Hallam University
    • Biomedical Research CentreSheffield Hallam University
Original Paper

DOI: 10.1007/s00216-011-5090-4

Cite this article as:
Hart, P.J., Francese, S., Claude, E. et al. Anal Bioanal Chem (2011) 401: 115. doi:10.1007/s00216-011-5090-4

Abstract

Lipidomics is a rapidly expanding area of scientific research and there are a number of analytical techniques that are employed to facilitate investigations. One such technique is matrix-assisted laser desorption ionisation (MALDI) mass spectrometry (MS). Previous MALDI-MS studies involving lipidomic investigation have included the analysis of a number of different ex vivo tissues, most of which were obtained from animal models, with only a few being of human origin. In this study, we describe the use of MALDI-MS, MS/MS and MS imaging methods for analysing lipids within cross-sections of ex vivo human skin. It has been possible to tentatively identify lipid species via accurate mass measurement MALDI-MS and also to confirm the identity of a number of these species via MALDI-MS/MS, in experiments carried out directly on tissue. The main lipid species detected include glycerophospholipids and sphingolipids. MALDI images have been generated at a spatial resolution of 150 and 30 μm, using a MALDI quadrupole time-of-flight Q-Star Pulsar-iTM (Applied Biosystems/MDS Sciex, Concord, ON, Canada) and a MALDI high-definition MS (HDMS) SYNAPT G2-HDMSTM system (Waters, Manchester, UK), respectively. These images show the normal distribution of lipids within human skin, which will provide the basis for assessing alterations in lipid profiles linked to specific skin conditions e.g. sensitisation, in future investigations.

Keywords

Matrix-assisted laser desorption ionisation mass spectrometry imagingMatrix-assisted laser desorption ionisationMass spectrometry imagingLipidsSkin

Copyright information

© Springer-Verlag 2011