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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Briones, Ana M. Salaices, Mercedes Cachofeiro, Victoria García-redondo, Ana B. Martínez-revelles, Sonia Galán, María Avendaño, Maria S. Oliveira, Edilamar M. Fernandes, Tiago Roque, Fernanda R. Vassallo, Dalton V. |
| Description | Author Affiliation: Roque FR ( Departamento de Farmacología, Facultad de Medicina, Universidad Autónoma de Madrid, Instituto de Investigación Hospital Universitario La Paz (IdiPAZ), Madrid, España.) |
| Abstract | BACKGROUND AND PURPOSE: Regular physical activity is an effective non-pharmacological therapy for prevention and control of hypertension. We investigated the effects of aerobic exercise training in vascular remodelling and in the mechanical and functional alterations of coronary and small mesenteric arteries from spontaneously hypertensive rats (SHR). EXPERIMENTAL APPROACH: Normotensive Wistar Kyoto (WKY), SHR and SHR trained on a treadmill for 12 weeks were used to evaluate vascular structural, mechanical and functional properties. KEY RESULTS: Exercise did not affect lumen diameter, wall thickness and wall/lumen ratio but reduced vascular stiffness of coronary and mesenteric arteries from SHR. Exercise also reduced collagen deposition and normalized altered internal elastic lamina organization and expression of MMP-9 in mesenteric arteries from SHR. Exercise did not affect contractile responses of coronary arteries but improved the endothelium-dependent relaxation in SHR. In mesenteric arteries, training normalized the increased contractile responses induced by U46619 and by high concentrations of acetylcholine. In vessels from SHR, exercise normalized the effects of the NADPH oxidase inhibitor apocynin and the NOS inhibitor l-NAME in vasodilator or vasoconstrictor responses, normalized the increased O(2) (-) production and the reduced Cu/Zn superoxide dismutase expression and increased NO production. CONCLUSIONS AND IMPLICATIONS: Exercise training of SHR improves endothelial function and vascular stiffness in coronary and small mesenteric arteries. This might be related to the concomitant decrease of oxidative stress and increase of NO bioavailability. Such effects demonstrate the beneficial effects of exercise on the vascular system and could contribute to a reduction in blood pressure. |
| ISSN | 00071188 |
| e-ISSN | 14765381 |
| Journal | British Journal of Pharmacology |
| Issue Number | 3 |
| Volume Number | 168 |
| Language | English |
| Publisher | Wiley Online Library(on behalf of The British Pharmacological Society) |
| Publisher Date | 2013-02-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | Open |
| Subject Keyword | Coronary Vessels Physiopathology Hypertension Therapy Mesenteric Arteries Physical Conditioning, Animal Animals Blood Pressure Citrate (si)-Synthase Metabolism Collagen Heart Rate Nitric Oxide Nitrites Blood Oxidative Stress Rats, Inbred SHR Rats, Inbred WKY Superoxides Research Support, Non-U.S. Gov't Pharmacology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Pharmacology |
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