Potential vasorelaxant effects of oleanolic acid and erythrodiol, two triterpenoids contained in ‘orujo’ olive oil, on rat aorta
Autor/a
Rodríguez-Rodríguez, Rosalía
Herrera, María Dolores
Perona, Javier S.
Ruiz-Gutiérrez, Valentina
Fecha de publicación
2004ISSN
0007-1145
Resumen
‘Orujo’ olive oil is obtained by chemical processes from the waste resulting from the mechanical extraction of virgin olive oil. The aim of the present study was to evaluate a new pharmacological property of two natural triterpenoids contained in olive oil, as vasodilatory agents, and to determine their mechanism of action. The two compounds studied were oleanolic acid and erythrodiol. The vasorelaxant effect induced by these pentacyclic triterpenoids was studied in isolated thoracic rat aorta. Oleanolic acid and erythrodiol, accumulatively added, showed vasorelaxant activities in aortic rings with endothelium pre-contracted by 10−6 M-phenylephrine (maximum percentage of relaxation 86·38 (SEM 2·89) and 73·53 (SEM 6·01), respectively). They had almost no relaxant effect on depolarised or endothelium-denuded aortic segments. The relaxation was significantly attenuated by pre-treatment with the NO synthase inhibitor Nω-nitro-L-arginine-methylester (L-NAME; 3×10−4 m). To characterise the involvement of endothelial factors, in addition to NO, arteries with endothelium were exposed to 10−5 M-indomethacin (INDO), a cyclo-oxygenase inhibitor, or INDO plus L-NAME. INDO did not have any significant effect on the relaxant response of both compounds. The combination of L-NAME plus INDO only abolished the oleanolic acid-induced relaxation. The present results suggest that the mechanism of relaxation seems to be mainly mediated by the endothelial production of NO; however, other mechanisms cannot be excluded. It can be concluded that oleanolic acid and erythrodiol may have interesting therapeutic potential as new vasodilator drugs, thus protecting the cardiovascular system. Therefore, the intake of ‘orujo’ olive oil, as a source of these compounds, might be beneficial in this regard.
Tipo de documento
Artículo
Versión del documento
Versión aceptada
Lengua
English
Materias (CDU)
61 - Medicina
Palabras clave
Oli d'oliva
Endoteli
Farmacologia
Vasodilatadors
Sistema cardiovascular
Aceite de oliva
Endotelio
Farmacología
Vasodilatadores
Sistema cardiovascular
Olive oil
Endothelium
Pharmacology
Vasodilators
Cardiovascular system
Páginas
8
Publicado por
Cambridge University Press
Colección
92;
Publicado en
British Journal of Nutrition
Citación
Rodríguez-Rodríguez, Rosalía; Herrera, María Dolores; Perona, Javier S. [et al.]. Potential vasorelaxant effects of oleanolic acid and erythrodiol, two triterpenoids contained in ‘orujo’ olive oil, on rat aorta. British Journal of Nutrition. 2004, 92, p. 635-642. Disponible en: <https://www.cambridge.org/core/journals/british-journal-of-nutrition/article/potential-vasorelaxant-effects-of-oleanolic-acid-and-erythrodiol-two-triterpenoids-contained-in-orujo-olive-oil-on-rat-aorta/F6944786DF60291E59667A7948E9D7C5>. Fecha de acceso: 23 jun. 2020. DOI: 10.1079/BJN20041231
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Derechos
© The Authors 2004