Imaging of lipids in cultured mammalian neurons by matrix assisted laser/desorption ionization and secondary ion mass spectrometry

Hyun Jeong Yang, Yuki Sugiura, Itsuko Ishizaki, Noriaki Sanada, Koji Ikegami, Nobuhiro Zaima, Kamlesh Shrivas, Mitsutoshi Setou

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Imaging mass spectrometry (IMS) provides a novel opportunity for visualization of molecular ion distribution. Currently, there are two major ionization techniques, matrix-assisted laser desorption/ionization (MALDI) and secondary ion mass spectrometry (SIMS) are widely used for imaging of biomolecules in tissue samples. MALDI and SIMS-based IMS have the following features; measurable mass ranges are wide and small, and the spatial resolutions are low and high, respectively. To the best of our knowledge, this is a first report to identify the lipids in cultured mammalian neurons by MALDI-IMS. Further, those neurons were analyzed with SIMS-IMS in order to compare the distribution pattern of lipids and other derived fragments. The parameters which influence the identification of lipids in cultured neurons were optimized in order to get an optimum detection of lipid molecules. The combined spatial data of MALDI and SIMS supported the idea that the signals of small molecules such as phosphatidylcholine head groups and fatty acids (detected in SIMS) are derived from the intact lipids (detected in MALDI-IMS).

Original languageEnglish
Pages (from-to)1606-1611
Number of pages6
JournalSurface and Interface Analysis
Volume42
Issue number10-11
DOIs
Publication statusPublished - 2010 Oct 1
Externally publishedYes

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Keywords

  • Imaging mass spectrometry
  • MALDI
  • Neuron
  • SCG
  • SIMS

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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