MALDI imaging and profiling MS of higher mass proteins from tissue

  • Alexandra van Remoortere
  • René J. M. van Zeijl
  • Nico van den Oever
  • Julien Franck
  • Rémi Longuespée
  • Maxence Wisztorski
  • Michel Salzet
  • André M. Deelder
  • Isabelle Fournier
  • Liam A. McDonnell


MALDI imaging and profiling mass spectrometry of proteins typically leads to the detection of a large number of peptides and small proteins but is much less successful for larger proteins: most ion signals correspond to proteins of m/z < 25,000. This is a severe limitation as many proteins, including cytokines, growth factors, enzymes, and receptors have molecular weights exceeding 25 kDa. The detector technology typically used for protein imaging, a microchannel plate, is not well suited to the detection of high m/z ions and is prone to detector saturation when analyzing complex mixtures. Here we report increased sensitivity for higher mass proteins by using the CovalX high mass HM1 detector (Zurich, Switzerland), which has been specifically designed for the detection of high mass ions and which is much less prone to detector saturation. The results demonstrate that a range of different sample preparation strategies enable higher mass proteins to be analyzed if the detector technology maintains high detection efficiency throughout the mass range. The detector enables proteins up to 70 kDa to be imaged, and proteins up to 110 kDa to be detected, directly from tissue, and indicates new directions by which the mass range amenable to MALDI imaging MS and MALDI profiling MS may be extended.


MALDI High Mass Matrix Solution Image Mass Spectrometry HFIP 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Supplementary material

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Supplementary material, approximately 181 KB.


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Copyright information

© American Society for Mass Spectrometry 2010

Authors and Affiliations

  • Alexandra van Remoortere
    • 1
  • René J. M. van Zeijl
    • 1
  • Nico van den Oever
    • 2
  • Julien Franck
    • 3
  • Rémi Longuespée
    • 3
  • Maxence Wisztorski
    • 3
  • Michel Salzet
    • 3
  • André M. Deelder
    • 1
  • Isabelle Fournier
    • 3
  • Liam A. McDonnell
    • 1
  1. 1.Biomolecular Mass Spectrometry Unit, Department of ParasitologyLeiden University Medical CenterLeidenThe Netherlands
  2. 2.Hogeschool LeidenLeidenThe Netherlands
  3. 3.Université de Lillel, CNRS-FRE 3249, MALDI Imaging TeamLaboratoire de Neuroimmunologie et Neurochimie EvolutivesVilleneuve d’AscqFrance

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