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Eicosapentaenoic acid reduces thrombin-evoked release of endothelin-1 in cultured bovine endothelial cells.

Abstract : Endothelial cells were isolated from bovine thoracic aorta and cultured. Bovine aortic endothelial cells (BAEC) were incubated with radiolabeled arachidonic acid (3H-AA) or eicosapentaenoic acid (14C-EPA) (1 microM) for 3 hr. Both fatty acids were predominantly incorporated into phosphatidylcholine (57 +/- 2% and 62 +/- 2% respectively) and slightly into phosphatidylethanolamine (11 +/- 0.5% and 12 +/- 0.6% respectively). phosphatidylinositol (26 +/- 1.5% and 10 +/- 0.5% respectively) and neutral lipids (6 +/- 0.5% and 15 +/- 1% respectively). After BAEC incubation with 3H-AA for 24 hr with or without EPA (1 microM), the release of radioactive metabolites of AA induced by thrombin (5.5 U/ml) was strongly reduced by the preliminary treatment with EPA (72 +/- 5%). After BAEC incubation with AA, EPA or vehicle (control), endothelin-1 levels were measured by RIA in the culture medium and we observed that: 1) the basal production of endothelin-1 was not modified after either AA or EPA treatment, 2) the thrombin-evoked release of endothelin-1 was significantly reduced by EPA (5.8 +/- 0.82 and 3.8 +/- 0.50 pg/microg proteins in control and EPA-treated cells, respectively); 3) by contrast, AA had no significant effect on the thrombin-evoked release of endothelin-1. In conclusion, EPA reduces strongly the endothelin-1 release but AA is ineffective. This reduction of endothelin-1 release may account partly for some of the vascular effects of EPA.
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https://hal-univ-rennes1.archives-ouvertes.fr/hal-02442876
Contributor : Soazik Jamin <>
Submitted on : Thursday, January 16, 2020 - 5:58:42 PM
Last modification on : Friday, January 17, 2020 - 1:26:41 AM

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  • HAL Id : hal-02442876, version 1
  • PUBMED : 10954131

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Soazik Jamin, M Crabos, M Catheline, C Martin-Chouly, A. Legrand, et al.. Eicosapentaenoic acid reduces thrombin-evoked release of endothelin-1 in cultured bovine endothelial cells.. Research Communications in Molecular Pathology and Pharmacology, Pjd Publications, Ltd., 1999, 105 (3), pp.271-81. ⟨hal-02442876⟩

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