Impact of a Multichannel Blocker in Attenuating Intramyocardial Artery Remodeling in Hypertensive Rats through Increased Nitric Oxide Bioavailability

• Published in: BioMed research international Vol. 2019; no. 2019; pp. 1 - 6
• Main Authors: Quintana-Villamandos, Begoña, Delgado-Baeza, Emilio, Delgado-Martos, María Jesús
• Format: Journal Article
• Language: English
• Published: Cairo, Egypt Hindawi Publishing Corporation 01.01.2019; Hindawi; Hindawi Limited
• Subjects: Animals; Bioavailability; Blood pressure; Cardiac arrhythmia; Cardiology; Chronic Disease; Collagen; Coronary vessels; Coronary Vessels - metabolism; Coronary Vessels - pathology; Coronary Vessels - physiopathology; Density; Dronedarone - pharmacology; Fibrillation; Fibrosis; Heart rate; Hypertension; Hypertension - blood; Hypertension - drug therapy; Hypertension - pathology; Hypertension - physiopathology; Nitric oxide; Nitric Oxide - blood; Physiology; Rats; Rats, Inbred SHR; Rats, Inbred WKY; Rodents; Vascular Remodeling - drug effects; Veins & arteries; Spain
• ISSN: 2314-6133; 2314-6141
• DOI: 10.1155/2019/6374582

Dronedarone is recommended for the treatment of atrial fibrillation. However, we do not know its effect on vascular remodeling. This study was designed to assess whether dronedarone has the potential to improve the intramyocardial artery remodeling induced by chronic hypertension. Ten-month-old male spontaneously hypertensive rats (SHR) were randomly assigned to receive dronedarone (100 mg/kg) or vehicle. Age-matched male Wistar-Kyoto rats served as controls. After 14 days of treatment, we studied the structure (geometry and fibrosis) of the intramyocardial artery using histological analysis. Nitric oxide (NO) in plasma was analyzed. In the untreated SHR, we observed a significant increase in external diameter, lumen diameter, wall width, cross-sectional area, and collagen volume density, as was expected in the experimental model. Dronedarone induced a significant decrease in wall width, cross-sectional area, and collagen volume density in SHR-D in comparison with untreated SHR. The values obtained in SHR-D were similar in the WKY control group. We found significantly higher NO levels in plasma in SHR-D than in untreated SHR. Dronedarone improves the intramyocardial artery remodeling induced by chronic hypertension in SHR through increased nitric oxide bioavailability.