Characterization of bulk phosphatidylcholine compositions in human Plasma using Side-Chain resolving lipidomics

Jan D. Quell, Werner Römisch-Margl, Mark Haid, Jan Krumsiek, Thomas Skurk, Anna Halama, Nisha Stephan, Jerzy Adamski, Hans Hauner, Dennis Mook-Kanamori, Robert P. Mohney, Hannelore Daniel, Karsten Suhre, Gabi Kastenmüller

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3 Citations (Scopus)

Abstract

Kit-based assays, such as AbsoluteIDQTM p150, are widely used in large cohort studies and provide a standardized method to quantify blood concentrations of phosphatidylcholines (PCs). Many disease-relevant associations of PCs were reported using this method. However, their interpretation is hampered by lack of functionally-relevant information on the detailed fatty acid side-chain compositions as only the total number of carbon atoms and double bonds is identified by the kit. To enable more substantiated interpretations, we characterized these PC sums using the side-chain resolving Lipidyzer™ platform, analyzing 223 samples in parallel to the AbsoluteIDQTM. Combining these datasets, we estimated the quantitative composition of PC sums and subsequently tested their replication in an independent cohort. We identified major constituents of 28 PC sums, revealing also various unexpected compositions. As an example, PC 16:0_22:5 accounted for more than 50% of the PC sum with in total 38 carbon atoms and 5 double bonds (PC aa 38:5). For 13 PC sums, we found relatively high abundances of odd-chain fatty acids. In conclusion, our study provides insights in PC compositions in human plasma, facilitating interpretation of existing epidemiological data sets and potentially enabling imputation of PC compositions for future meta-analyses of lipidomics data.

Original languageEnglish
Article number109
JournalMetabolites
Volume9
Issue number6
DOIs
Publication statusPublished - 1 Jun 2019

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Keywords

  • Fatty acid composition
  • Harmonization
  • Imputation
  • Isobaric phosphatidylcholines
  • Lipid species
  • Lipidomics
  • Metabolomics
  • Phospholipids
  • Platform comparison

ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism
  • Biochemistry
  • Molecular Biology

Cite this

Quell, J. D., Römisch-Margl, W., Haid, M., Krumsiek, J., Skurk, T., Halama, A., Stephan, N., Adamski, J., Hauner, H., Mook-Kanamori, D., Mohney, R. P., Daniel, H., Suhre, K., & Kastenmüller, G. (2019). Characterization of bulk phosphatidylcholine compositions in human Plasma using Side-Chain resolving lipidomics. Metabolites, 9(6), [109]. https://doi.org/10.3390/metabo9060109