Long-term effects of early administered sildenafil and NO donor on the cardiovascular system of SHR

• Autorzy: Kristek F. , Koprdova R. , Cebova M.
• Języki publikacji: EN

Abstrakty

EN

We evaluated the long-term effect of NO-donor, pentaerythrityl tetranitrate (Petn), and sildenafil citrate (sildenafil) on the cardiovascular system of the spontaneously hypertensive rat (SHR). Petn (100 mg/kg/day) and sildenafil (10 mg/kg/day) were administered to SHR individually or together from week 4 (pre-hypertensive period) to week 9 of age. Blood pressure (BP) was measured using a plethysmographic method. The animals were perfused with a glutaraldehyde fixative (120 mmHg). Carotid (AC) and coronary artery (RS) were processed according to electron microscopy procedure. Geometry of the arteries was measured on semi-thin sections using light microscopy. Administration of Petn and sildenafil to SHR individually or together did not prevent an increase of BP, but evoked a decrease of cardiac hypertrophy. Petn and sildenafil affected the geometry of RS and AC differently. In the RS, an increase of inner diameter (ID) without an increase of wall thickness (WT) resulted in increased WT/ID and circumferential stress. In the AC, changes in ID were accompanied by changes in WT and, thereby, WT/ID and circumferential stress remained unchanged. The arterial wall mass of both arteries was increased. The data suggest that administration of the NO donor, Petn, and/or sildenafil does not result in a beneficial effect on the myocardium or on the geometry of the carotid and coronary arteries.

Słowa kluczowe

EN

sildenafil; spontaneously hypertensive rat; carotid artery; nitric oxide donor; coronary artery; geometry; hypertension; pentaerythrityl tetranitrate; circumferential stress; rat; blood pressure

• Wydawca: -
• Czasopismo: Journal of Physiology and Pharmacology
• Rocznik: 2007
• Tom: 58
• Numer: 1
• Opis fizyczny: p.33-43,fig.,ref.

Twórcy

autor

Kristek F.

• Slovak Academy of Sciences, Sienkiewiczova 1, 813 71 Bratislava, Slovak Republic

autor

Koprdova R.

autor

Cebova M.