Lipidomic Analysis of Plasma from Healthy Men and Women Shows Phospholipid Class and Molecular Species Differences between Sexes

A - Papers appearing in refereed journals

West, A. L., Michaelson, L. V., Miles, E. A., Haslam, R. P., Lillycrop, K. A., Georgescu, R., Han, L., Napier, J. A., Calder, P. C. and Burdge, G. C. 2020. Lipidomic Analysis of Plasma from Healthy Men and Women Shows Phospholipid Class and Molecular Species Differences between Sexes. Lipids. https://doi.org/10.1002/lipd.12293

AuthorsWest, A. L., Michaelson, L. V., Miles, E. A., Haslam, R. P., Lillycrop, K. A., Georgescu, R., Han, L., Napier, J. A., Calder, P. C. and Burdge, G. C.
Abstract

The phospholipid composition of lipoproteins is determined by the specificity of hepatic phospholipid biosynthesis. Plasma phospholipid 20:4n-6 and 22:6n-3 concentrations are higher in women than in men. We used this sex difference in a lipidomics analysis of the impact of endocrine factors on the phospholipid class and molecular species composition of fasting plasma from young men and women. Diester species predominated in all lipid classes measured. 20/54 Phosphatidylcholine (PtdCho) species were alkyl ester, 15/48 phosphatidylethanolamine (PtdEtn) species were alkyl ester, and 12/48 PtdEtn species were alkenyl ester. There were no significant differences between sexes in the proportions of alkyl PtdCho species. The proportion of alkyl ester PtdEtn species was greater in women than men, while the proportion of alkenyl ester PtdEtn species was greater in men than women. None of the phosphatidylinositol (PtdIns) or phosphatidylserine (PtdSer) molecular species contained ether-linked fatty acids. The proportion of PtdCho16:0_22:6, and the proportions of PtdEtn O-16:0_20:4 and PtdEtn O-18:2_20:4 were greater in women than men. There were no sex differences in PtdIns and PtdSer molecular species compositions. These findings show that plasma phospholipids can be modified by sex. Such differences in lipoprotein phospholipid composition could contribute to sexual dimorphism in patterns of health and disease.

KeywordsArachidonic acid; Docosahexaenoic acid; Phospholipid molecular species; Plasma ; Sex differences
Year of Publication2020
JournalLipids
Digital Object Identifier (DOI)https://doi.org/10.1002/lipd.12293
Open accessPublished as ‘gold’ (paid) open access
FunderBiotechnology and Biological Sciences Research Council
Funder project or codeTPM - Tailoring Plant Metabolism - Work package 1 (WP1) - High value lipids for health and industry
Publisher's version
Output statusPublished
Publication dates
Online07 Dec 2020
Publication process dates
Accepted29 Oct 2020
PublisherWiley
ISSN0024-4201

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