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<dc:title xml:lang="fr">Protection vasculaire par la nouvelle formulation d'oméga-3 : rôle de la NO synthase endothéliale</dc:title>
<dcterms:alternative xml:lang="en">Vascular protection by the new formation of omega-3 : role of endothelial NO synthase</dcterms:alternative>
<dc:subject xml:lang="fr">Oxyde nitrique</dc:subject>
<dc:subject xml:lang="fr">Omega-3 EPA:DHA 6:1</dc:subject>
<dc:subject xml:lang="fr">Cellules endotheliales</dc:subject>
<dc:subject xml:lang="en">Nitric oxide</dc:subject>
<dc:subject xml:lang="en">Omega-3 EPA:DHA 6:1</dc:subject>
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<dcterms:abstract xml:lang="fr">Le but du présent travail est d’évaluer le potentiel d’oméga-3 à induire la fonction endothélial, et à inhiber la contraction des artères coronaires en réponse aux plaquettes activées.L’induction des relaxations dépendantes de l’endothélium est affecté à la fois par le ratio et la pureté des formulations, avec un effet maximal obtenu pour la formulation EPA:DHA 6:1 à haut degré de pureté via une activation redox-sensible des voies de signalisation PI3-kinase/Akt et/ou MAPKs menant à l’activation de eNOS. La formulation EPA:DHA 6:1 inhibe les contractions induites par les plaquettes impliquant la sérotonine dans les artères coronaires de porc, et les contractions à la sérotonine dans les artères coronaires porcines et mammaires internes humaines, principalement par une augmentation de la formation endothéliale de NO. Ces résultats indiquent que la formulation optimisée EPA:DHA 6:1 exerce un effet bénéfique sur le système cardiovasculaire via l’activation de la fonction endothéliale.</dcterms:abstract>
<dcterms:abstract xml:lang="en">The aim of the present work was to evaluate both the potency of omega-3 formulations to induce the endothelial function and the effect of omega-3 on the platelet-induced coronary artery contraction.The endothelium-dependent relaxations induced by EPA:DHA formulations is dependent on both the ratio and the purity of the formulation, with the maximal effect obtained with a highly purified EPA:DHA 6:1 ratio through a redox-sensitive activation of PI3-kinase/Akt and/or MAPKs pathways and subsequent activation of eNOS. The EPA:DHA 6:1 formulation inhibits the platelet-induced serotonin-mediated contraction of porcine coronary rings and the 5HT-induced contraction in both porcine coronary artery and human internal mammary artery rings, mainly due to an increased endothelial formation of NO. Taken together, the present findings indicate that the optimized EPA:DHA 6:1 formulation is able to exert potent beneficial cardiovascular effects through the activation of the endothelial function.</dcterms:abstract>
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