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Mass Spectrometric Analysis of Glycosphingolipid Antigens
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Accurate Sphingolipid Quantification Reducing Fragmentation Bias by Nonlinear Models.

Nina Troppmair1,2, Dominik Kopczynski1, Alice Assinger3

  • 1Department of Analytical Chemistry, Faculty of Chemistry, University of Vienna, 1090 Vienna, Austria.

Analytical Chemistry
|October 2, 2023
PubMed
Summary
This summary is machine-generated.

A new method improves sphingolipid quantification by using fragmentation models to correct for structural diversity, overcoming limitations of traditional methods. This advance enhances the accuracy of sphingolipid analysis in biological samples.

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Area of Science:

  • Lipidomics
  • Biochemistry
  • Metabolomics

Background:

  • Quantitative sphingolipid analysis is vital for understanding cellular processes and diseases.
  • Current methods using a single internal standard per sphingolipid class struggle with structural diversity.
  • Fragmentation differences limit the accuracy of traditional sphingolipid quantification.

Purpose of the Study:

  • To develop a novel, accurate, and versatile approach for quantitative sphingolipid analysis.
  • To overcome the limitations of the "one standard per class" strategy in sphingolipidomics.
  • To provide a user-friendly tool for precise sphingolipid measurements.

Main Methods:

  • Utilized fragmentation models to correct for structural variations in sphingolipids.
  • Developed an internal standard-independent quantification method.
  • Integrated the novel approach into a KNIME workflow for accessibility.

Main Results:

  • The new method accurately quantifies ceramide subclasses across diverse biological matrices.
  • Demonstrated independence from internal standards, instrumental setup, and collision energy.
  • Validated the effectiveness of the fragmentation model-based approach.

Conclusions:

  • This novel approach significantly enhances the accuracy of sphingolipid quantification.
  • The method offers a robust solution for analyzing sphingolipid metabolism.
  • Opens new possibilities for research in sphingolipid-related physiology and pathology.