Cited by 179Lipid Membrane Structure and BehaviorFatty Acid Research and HealthCholesterol and Lipid Metabolism

Eicosapentaenoic acid reduces membrane fluidity, inhibits cholesterol domain formation, and normalizes bilayer width in atherosclerotic-like model membranes

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Mason, R. Preston, Jacob, Robert F., Shrivastava, Sandeep, Sherratt, Samuel C.R., Chattopadhyay, Amitabha·2016·Biochimica et Biophysica Acta (BBA) - Biomembranes

Abstract

Cholesterol crystalline domains characterize atherosclerotic membranes, altering vascular signaling and function. Omega-3 fatty acids reduce membrane lipid peroxidation and subsequent cholesterol domain formation. We evaluated non-peroxidation-mediated effects of eicosapentaenoic acid (EPA), other TG-lowering agents, docosahexaenoic acid (DHA), and other long-chain fatty acids on membrane fluidity, bilayer width, and cholesterol domain formation in model membranes. In membranes prepared at 1.5:1 cholesterol-to-phospholipid (C/P) mole ratio (creating pre-existing domains), EPA, glycyrrhizin, arachidonic acid, and alpha linolenic acid promoted the greatest reductions in cholesterol domains (by 65.5%, 54.9%, 46.8%, and 45.2%, respectively) compared to controls; other treatments had modest effects. EPA effects on cholesterol domain formation were dose-dependent. In membranes with 1:1 C/P (predisposing domain formation), DHA, but not EPA, dose-dependently increased membrane fluidity. DHA also induced cholesterol domain formation without affecting temperature-induced changes in-bilayer unit cell periodicity relative to controls (d-space; 57Å-55Å over 15-30°C). Together, these data suggest simultaneous formation of distinct cholesterol-rich ordered domains and cholesterol-poor disordered domains in the presence of DHA. By contrast, EPA had no effect on cholesterol domain formation and produced larger d-space values relative to controls (60Å-57Å; p<0.05) over the same temperature range, suggesting a more uniform maintenance of lipid dynamics despite the presence of cholesterol. These data indicate that EPA and DHA had different effects on membrane bilayer width, membrane fluidity, and cholesterol crystalline domain formation; suggesting omega-3 fatty acids with differing chain length or unsaturation may differentially influence membrane lipid dynamics and structural organization as a result of distinct phospholipid/sterol interactions.

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Authors
Mason, R. P., Jacob, R. F., Shrivastava, S., Sherratt, S. C. R., & Chattopadhyay, A.
Affiliations
  • Brigham and Women's Hospital (US)
  • Centre for Cellular and Molecular Biology (IN)
Corresponding author
Mason, R. Preston
Venue
Biochimica et Biophysica Acta (BBA) - Biomembranes
Publisher
Elsevier BV
Published
2016-12
Volume
1858
Issue
12
Pages
3131-3140
ISSN
0005-2736 (ISSN-L)
OpenAlex
W2527894800
Cited by
179
References
76
Citations by year
2026: 12 · 2025: 10 · 2024: 25 · 2023: 22 · 2022: 26 · 2021: 27 · 2020: 23 · 2019: 17 · 2018: 8 · 2017: 8
FWCI
5.72
Type
journal article
Language
en
Open access
Locations
  • Biochimica et Biophysica Acta (BBA) - Biomembranes (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • Amarin Pharma
  • Bangladesh Council of Scientific and Industrial Research
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Lipid Membrane Structure and Behavior
  • Health Sciences › Nursing › Nutrition and Dietetics › Fatty Acid Research and Health
  • Health Sciences › Medicine › Surgery › Cholesterol and Lipid Metabolism
Keywords
eicosapentaenoic acid, docosahexaenoic acid, omega-3 fatty acids, membrane fluidity, atherosclerosis, model membranes, cholesterol/phospholipid ratio, lipid peroxidation, long-chain fatty acids, glycyrrhizin, arachidonic acid, alpha-linolenic acid, lipid dynamics
MeSH terms
Cholesterol, Docosahexaenoic Acids, Dose-Response Relationship, Drug, Humans, Lipid Bilayers, Membrane Fluidity, Eicosapentaenoic Acid, Atherosclerosis

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