Cited by 407Fatty Acid Research and HealthLipoproteins and Cardiovascular HealthEicosanoids and Hypertension Pharmacology

Emerging Mechanisms of Cardiovascular Protection for the Omega-3 Fatty Acid Eicosapentaenoic Acid

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Mason, R. Preston, Libby, Peter, Bhatt, Deepak L.·2020·Arteriosclerosis, Thrombosis, and Vascular Biology

Abstract

Patients with well-controlled LDL (low-density lipoprotein) levels still have residual cardiovascular risk associated with elevated triglycerides. Epidemiological studies have shown that elevated fasting triglyceride levels associate independently with incident cardiovascular events, and abundant recent human genetic data support the causality of TGRLs (triglyceride-rich lipoproteins) in atherothrombosis. Omega-3 fatty acids, such as eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), lower blood triglyceride concentrations but likely exert additional atheroprotective properties at higher doses. Omega-3 fatty acids modulate T-cell differentiation and give rise to various prostaglandins and specialized proresolving lipid mediators that promote resolution of tissue injury and inflammation. The REDUCE-IT (Reduction of Cardiovascular Events with Icosapent Ethyl–Intervention Trial) with an EPA-only formulation lowered a composite of cardiovascular events by 25% in patients with established cardiovascular disease or diabetes mellitus and other cardiovascular risk factors. This clinical benefit likely arises from multiple molecular mechanisms discussed in this review. Indeed, human plaques readily incorporate EPA, which may render them less likely to trigger clinical events. EPA and DHA differ in their effects on membrane structure, rates of lipid oxidation, inflammatory biomarkers, and endothelial function as well as tissue distributions. Trials that have evaluated DHA-containing high-dose omega-3 fatty acids have thus far not shown the benefits of EPA alone demonstrated in REDUCE-IT. This review will consider the mechanistic evidence that helps to understand the potential mechanisms of benefit of EPA.

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Registry

Crossref · 10.1161/atvbaha.119.313286

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128 of 128 references verified0 citation errors · 0 not checkable

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  • DHA is biochemically and pharmacologically different from EPA in membrane incorporation, lipoprotein oxidation, and generation of specialized pro-resolving lipid mediators.

    “DHA is biochemically and pharmacologically different from EPA in membrane incorporation, lipoprotein oxidation, and generation of specialized pro‐resolving lipid mediators. 146 , 148”

    From Association Between Omega-3 Fatty Acid Intake and Dyslipidemia: A Continuous Dose-Response Meta-Analysis of Randomized Controlled Trials (2023) · cites this paper as [148]

    The Comparative Biophysical and Antioxidant Properties section (page unavailable) describes different membrane conformations for EPA and DHA and says DHA’s antioxidant capacity wanes more rapidly. The EPA and DHA Give Rise to Bioactive Lipids section says omega-3 fatty acids generate specialized pro-resolving mediators, but does not establish a difference between EPA and DHA in their generation. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • EPA assumes an extended conformation in lipoprotein molecules and cellular membranes, allowing it to neutralize extracellular-reactive oxygen species through its conjugated double bonds mediating stabilization of unpaired electrons.

    “The EPA assumes an extended conformation in lipoprotein molecules and cellular membranes, allowing it to neutralize extracellular-reactive oxygen species through its conjugated double bonds mediating stabilization of unpaired electrons [1].”

    From Effect of omega-3 fatty acids on cardiovascular outcomes: A systematic review and meta-analysis (2021) · cites this paper as [1]

    The section on comparative biophysical and antioxidant properties says EPA adopts an extended conformation in lipoprotein particles and cellular membranes and can scavenge ROS by stabilizing unpaired electrons through its conjugated double bonds. It does not specify that the ROS scavenged by this mechanism are extracellular; the paper discusses extracellular ROS separately in connection with inflammation-resolving metabolites. Page numbers are unavailable in our copy. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • The mechanisms for end point prevention appear to be attributed to the pleiotropic effects in addition to serum lipid regulation.

    “The mechanisms for end point prevention appear to be attributed to the pleiotropic effects in addition to serum lipid regulation. 38 , 148”
  • EPA and DHA differ in their biological effects on membrane structure and lipid metabolism.

    “since EPA and DHA differ in their biological effects on membrane structure and lipid metabolism”
  • A significant body of evidence suggests that EPA and DHA markedly differ regarding their effects on membrane structure, inflammatory cascade, lipid oxidation, endothelial function, and tissue distribution.

    “a signi fi cant body of evidence suggests that both EPA and DHA markedly differ regarding their effects on membrane structure, in fl ammatory cascade [8], lipid oxidation, endothelial function, and tissue”

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Research works printed but not linked: 1

  1. [3]Bhatt DL. Residual cardiovascular risk in statin-treated patients with elevated triglycerides: now we can REDUCE-IT! Eur Heart J. 2019; 40: 1174– 1175.30982067

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Authors
Mason, R. P., Libby, P., & Bhatt, D. L.
Affiliations
Brigham and Women's Hospital (US)
Corresponding author
Mason, R. Preston
Venue
Arteriosclerosis, Thrombosis, and Vascular Biology
Published
2020-05
Volume
40
Issue
5
Pages
1135-1147
ISSN
  • 1079-5642 (ISSN-L)
  • 1524-4636
OpenAlex
W3013214255
Cited by
407
References
128
Citations by year
2026: 43 · 2025: 56 · 2024: 61 · 2023: 68 · 2022: 69 · 2021: 67 · 2020: 38 · 2019: 2 · 2015: 2
FWCI
7.42
Type
journal article
Language
en
Open access
Locations
  • Arteriosclerosis Thrombosis and Vascular Biology (publishedVersion)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
Funders
  • Amgen
  • Bristol-Myers Squibb
  • Eli Lilly and Company
  • Pfizer
  • AstraZeneca
  • Sanofi
  • Brigham and Women's Hospital
  • Cleveland Clinic
  • CSL Behring
  • Boston Scientific Corporation
  • Regeneron Pharmaceuticals
  • Ironwood Pharmaceuticals, Incorporated
  • Ionis Pharmaceuticals
  • Amarin Corporation
  • Medicines Company
  • IFM Therapeutics
  • Kowa Company
  • XBiotech
  • Eisai
  • Novo Nordisk
  • Idorsia Pharmaceuticals
  • Esperion Therapeutics
  • St. Jude Medical
  • National Heart, Lung, and Blood Institute (R01HL080472, R01HL134892)
Topics
  • Health Sciences › Nursing › Nutrition and Dietetics › Fatty Acid Research and Health
  • Health Sciences › Medicine › Surgery › Lipoproteins and Cardiovascular Health
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Eicosanoids and Hypertension Pharmacology
Keywords
eicosapentaenoic acid, omega-3 fatty acids, cardioprotection, triglyceride-rich lipoproteins, residual cardiovascular risk, atherothrombosis, REDUCE-IT trial, plaque composition, T cell differentiation, specialized pro-resolving mediators, prostaglandins, docosahexaenoic acid, endothelial function, inflammation, lipid oxidation, LDL cholesterol
MeSH terms
Animals, Anti-Inflammatory Agents, Hypolipidemic Agents, Cardiovascular Diseases, Humans, Inflammation, Lipids, Risk Factors, Eicosapentaenoic Acid, Biomarkers, Treatment Outcome, Risk Assessment, Evidence-Based Medicine, Dietary Supplements, Dyslipidemias, Protective Factors

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