Abstract
Large, randomized trials testing omega-3 polyunsaturated fatty acid (ω-3 PUFA) supplementation to reduce cardiovascular events have reported contradictory results. Interpretation of these trials is challenging, because different dosages and formulations of ω-3 PUFA were tested. Furthermore, the exact mechanisms for the reduction in cardiovascular events are unclear. In this study, we investigated the effects of ω-3 PUFA on platelet adhesion, degranulation, and aggregation in vitro and in patients with cardiovascular disease using different formulations of ω-3 PUFA. We also investigated the effects of ω-3 PUFA in rodent models of arterial thrombosis and in tail bleeding assays, including in cyclooxygenase-1 (COX-1)-deficient animals. The ω-3 PUFA eicosapentaenoic acid (EPA) dose-dependently reduced platelet adhesion, degranulation, and aggregation in vitro. Moreover, arterial thrombus formation in wild-type mice was inhibited by oral EPA administration before thrombus formation. Photoaffinity labeling and in silico docking analyses suggested a direct, competitive interaction of EPA and arachidonic acid at the level of COX-1. The COX-1 dependency of EPA's inhibitory effects was confirmed by platelet-specific COX-1-deficient animals that had no reduction of thrombus burden by EPA. In patients with cardiovascular disease, switching from 2 grams of EPA twice daily to 1 gram of docosahexaenoic acid (DHA) (460 milligrams of EPA and 380 milligrams of DHA) once daily completely blunted the platelet inhibition achieved by EPA. Our results may partially explain contradictory results with different ω-3 PUFA formulations in clinical trials.
| Original language | English |
|---|---|
| Journal | Science Translational Medicine |
| Volume | 17 |
| Issue number | 799 |
| DOIs | |
| Publication status | Published - 21 May 2025 |
Funding
We thank K. Bartkowski for experimental support. F.A.S. and A.S. thank D. Kopczynski for the development of the bioinformatics platform Innt and S. Ideal for technical support. This work was supported by the Forschungskommission of the Medical Faculty of the Heinrich Heine University (nos. 46-2016 and 29-2019 to L.D., nos. 16-2014 and 18-2019 to A.P., no. 2020-51 to C.H., and no. 2021-01 to P.M.) and funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) (grant no. 493659010 to P.M.; grant no. 530690968 to M. Benkhoff; grant no. 236177352-SFB1116; TP B11 to A.P. and TP B11 to B.L.; TP B09 to N.G.; TP B6 and B12 to M.K.; grant nos. 493400536, 413659045, and 510844896 to A.P.; and grant nos. PE2704/3-1, PE2704/4-1, and PE2704/5-1 to T.P.), the Susanne-Bunnenberg-Stiftung at the Duesseldorf Heart Center, the DZHK (German Center for Cardiovascular Research) to A.P. and T.P. (external cooperation grant) and DZHK-BHF-DHF funding (MEGACARDIOCYTE, grant no. 81X2100286) to T.P., the Bundesministerium f\u00FCr Bildung und Forschung (BMBF) (to A.S., F.A.S., D.K., and S.H.L.V.), and the Ministerium f\u00FCr Kultur und Wissenschaft des Landes Nordrhein-Westfalen (to A.S., F.A.S., D.K., and S.H.L.V.). This work was further supported by the British Heart Foundation grants FS/16/1/31699 (to N.K.) and RG/18/4/33541 (to N.K. and J.M.).
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 3 Good Health and Well-being
Austrian Fields of Science 2012
- 301303 Medical biochemistry
- 301304 Medical biology
Keywords
- Animals
- Cyclooxygenase 1/metabolism
- Thrombosis/drug therapy
- Eicosapentaenoic Acid/pharmacology
- Humans
- Blood Platelets/drug effects
- Platelet Aggregation/drug effects
- Mice
- Male
- Platelet Adhesiveness/drug effects
- Mice, Inbred C57BL
- Arteries/pathology
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