Molecular mechanisms of the cardiovascular protective effects of polyphenols.
Fiche publication
Date publication
novembre 2012
Journal
The British journal of nutrition
Auteurs
Membres identifiés du Cancéropôle Est :
Dr ETIENNE-SELLOUM Nelly, Pr SCHINI-KERTH Valérie, Dr AUGER Cyril
Tous les auteurs :
Andriantsitohaina R, Auger C, Chataigneau T, Étienne-Selloum N, Li H, Martínez MC, Schini-Kerth VB, Laher I
Lien Pubmed
Résumé
Epidemiological studies have reported a greater reduction in cardiovascular risk and metabolic disorders associated with diets rich in polyphenols. The antioxidant effects of polyphenols are attributed to the regulation of redox enzymes by reducing reactive oxygen species production from mitochondria, NADPH oxidases and uncoupled endothelial NO synthase in addition to also up-regulating multiple antioxidant enzymes. Although data supporting the effects of polyphenols in reducing oxidative stress are promising, several studies have suggested additional mechanisms in the health benefits of polyphenols. Polyphenols from red wine increase endothelial NO production leading to endothelium-dependent relaxation in conditions such as hypertension, stroke or the metabolic syndrome. Numerous molecules contained in fruits and vegetables can activate sirtuins to increase lifespan and silence metabolic and physiological disturbances associated with endothelial NO dysfunction. Although intracellular pathways involved in the endothelial effects of polyphenols are partially described, the molecular targets of these polyphenols are not completely elucidated. We review the novel aspects of polyphenols on several targets that could trigger the health benefits of polyphenols in conditions such as metabolic and cardiovascular disturbances.
Mots clés
Animals, Antioxidants, metabolism, Cardiovascular Diseases, metabolism, Endothelium, Vascular, metabolism, Flavonoids, metabolism, Humans, Oxidative Stress, Phenols, metabolism, Polyphenols, metabolism
Référence
Br. J. Nutr.. 2012 Nov 14;108(9):1532-49