Shotgun lipidomics on a LTQ Orbitrap mass spectrometer by successive switching between acquisition polarity modes

DOI Web Site Web Site 被引用文献2件
  • Kai Schuhmann
    Max Planck Institute of Molecular Cell Biology and Genetics 01307 Dresden Germany
  • Reinaldo Almeida
    Advion Biosciences Ltd Essex CM20 2NQ United Kingdom
  • Mark Baumert
    Advion Biosciences Ltd Essex CM20 2NQ United Kingdom
  • Ronny Herzog
    Max Planck Institute of Molecular Cell Biology and Genetics 01307 Dresden Germany
  • Stefan R. Bornstein
    Department of Internal Medicine III Dresden University of Technology 01307 Dresden Germany
  • Andrej Shevchenko
    Max Planck Institute of Molecular Cell Biology and Genetics 01307 Dresden Germany

書誌事項

公開日
2012-01
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1002/jms.2031
公開者
Wiley

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説明

<jats:p>Top–down shotgun lipidomics relies on direct infusion of total lipid extracts into a high‐resolution tandem mass spectrometer and implies that individual lipids are recognized by their accurately determined <jats:italic>m</jats:italic>/<jats:italic>z</jats:italic>. Lipid ionization efficiency and detection specificity strongly depend on the acquisition polarity, and therefore it is beneficial to analyze lipid mixtures in both positive and negative modes. Hybrid LTQ Orbitrap mass spectrometers are widely applied in top–down lipidomics; however, rapid polarity switching was previously unfeasible because of the severe and immediate degradation of mass accuracy. Here, we report on a method to rapidly acquire high‐resolution spectra in both polarity modes with sub‐ppm mass accuracy and demonstrate that it not only simplifies and accelerates shotgun lipidomics analyses but also improves the lipidome coverage because more lipid classes and more individual species within each class are recognized. In this way, shotgun analysis of total lipid extracts of human blood plasma enabled to quantify 222 species from 15 major lipid classes within 7 min acquisition cycle. Copyright © 2012 John Wiley & Sons, Ltd.</jats:p>

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