The Effect of Quercus salicina Leaf Extracts on Vascular Endothelial Function: Role of Nitric Oxide.
Fiche publication
Date publication
février 2016
Journal
Journal of nanoscience and nanotechnology
Auteurs
Membres identifiés du Cancéropôle Est :
Pr SCHINI-KERTH Valérie
Tous les auteurs :
Park SH, Kim HJ, Yoon JS, Lee HW, Park GC, Yi E, Yoon G, Schini-Kerth VB, Oak MH
Lien Pubmed
Résumé
Dysfunction of the vascular endothelium is reported as a hallmark of cardiovascular diseases. Many evidences suggest that polyphenols are associated with a decreased global mortality and might be involved in protection against cardiovascular risk. This beneficial effect of polyphenol may be due to many actions as antioxidant that increases bioavailability of nitric oxide, vasodilation or anti-hypertensive properties. To identify new natural medicine candidate for cardiovascular protection, plant extracts used in traditional medicine were evaluated by vascular reactivity system. Porcine coronary artery rings were suspended in organ chambers for the measurement of changes in isometric tension. Screening results indicated that the ethanolic extract of leaf from Quercus salicina (QSE) has been found to exhibit potent vasorelaxant activity. QSE dose-dependently induced endothelium-dependent relaxations, which were abolished by inhibitors of nitric oxide synthase (Nomega-nitro-L-arginine). In addition, QSE strongly and dose-dependently activate endothelial nitric oxide synthase (eNOS) in porcine coronary artery endothelial cell. Taken together, the present study has demonstrated that QSE is a powerful endothelium-dependentvasodilator and that this effect involves increased nitric oxide bioavailability. In conclusion, QSE could be a cardiovascular protective herbal medicine candidate associated with cardiovascular diseases and endothelial dysfunction.
Référence
J Nanosci Nanotechnol. 2016 Feb;16(2):2069-71