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Related Experiment Video

Updated: Dec 24, 2025

Quantitative and Qualitative Method for Sphingomyelin by LC-MS Using Two Stable Isotopically Labeled Sphingomyelin Species
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Resolving Sphingolipid Isomers Using Cryogenic Infrared Spectroscopy.

Carla Kirschbaum1,2, Essa M Saied3,4, Kim Greis1,2

  • 1Institut für Chemie und Biochemie, Freie Universität Berlin, Arnimallee 22, 14195, Berlin, Germany.

Angewandte Chemie (International Ed. in English)
|April 16, 2020
PubMed
Summary
This summary is machine-generated.

Cryogenic gas-phase infrared spectroscopy can distinguish 1-deoxysphingolipid isomers, crucial for understanding diseases like diabetic neuropathy. This technique offers unique spectroscopic fingerprints for precise lipid analysis.

Keywords:
IR spectroscopydeoxysphingolipidsdouble-bond isomersisomersmass spectrometry

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Mass Spectrometric Analysis of Glycosphingolipid Antigens
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Area of Science:

  • Lipidomics
  • Analytical Chemistry
  • Spectroscopy

Background:

  • 1-Deoxysphingolipids are linked to neuropathy and other diseases.
  • Accurate identification of 1-deoxysphingolipids is vital for disease research.
  • Isomerism (ketone/alkenol, C=C, hydroxylation) complicates structural determination.

Purpose of the Study:

  • To demonstrate cryogenic gas-phase infrared (IR) spectroscopy for 1-deoxysphingolipid isomer identification.
  • To showcase the ability to differentiate various isomers using unique spectroscopic fingerprints.
  • To highlight the potential for enhanced lipidome analysis.

Main Methods:

  • Utilizing cryogenic gas-phase infrared (IR) spectroscopy on ionized 1-deoxysphingolipids.
  • Analyzing unique spectroscopic fingerprints generated by the technique.
  • Investigating specific interactions between charged amines and double bonds for isomer differentiation.

Main Results:

  • Cryogenic gas-phase IR spectroscopy successfully identified and differentiated 1-deoxysphingolipid isomers.
  • Spectroscopic fingerprints provided unique structural information.
  • Distinguished C=C bond positions and stereochemical configurations through specific ion-molecule interactions.
  • Overcame limitations of conventional mass spectrometry in isomer resolution.

Conclusions:

  • Gas-phase IR spectroscopy is a powerful tool for resolving complex lipid isomers.
  • This technique enhances the analysis of 1-deoxysphingolipids and their metabolites.
  • Paves the way for deeper insights into the lipidome and associated diseases.