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1 Institute of Normal and Pathological Physiology, Slovak Academy of Sciences, 813 71 Bratislava; 2 Department of Pathology, Medical Faculty, Comenius University, 81108 Bratislava, Slovak Republic; and 3 Pharmacologie et Physico-Chimie des Interactions Cellulaires et Moléculaires, Université Louis Pasteur de Strasbourg, Unité Mixte de Recherche Centre National de la Recherche Scientifique 7034, Faculté de Pharmacie, Illkirch, France
The effects of the red wine
polyphenolic compounds (Provinol) on hypertension, left ventricular
hypertrophy, myocardial fibrosis, and vascular remodeling were
investigated after chronic inhibition of nitric oxide (NO) synthase by
administration of
NG-nitro-L-arginine methyl ester
(L-NAME) to rats. Rats were divided into four groups: a
control group, a group treated for 4 wk with L-NAME (40 mg · kg
1 · day
1), and two
groups treated with L-NAME followed by 3 wk of either spontaneous recovery or recovery with Provinol treatment (40 mg · kg
1 · day
1).
Administration of Provinol produced a greater readiness of the decrease
in blood pressure than that in the spontaneous recovery group. Provinol
significantly depressed myocardial fibrosis and expedited the decrease
in aortic cross-sectional area, the increase in endothelium-dependent
relaxation, and the decrease in contraction of the aorta. These effects
of Provinol were associated with a greater increase of NO synthase
activity in the left ventricle and the aorta. The present study
provides evidence that Provinol accelerates the regression of blood
pressure and improves structural and functional cardiovascular changes
produced by chronic inhibition of NO synthesis.
nitric oxide synthase; myocardial fibrosis; aortic stiffness
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