Effects of pentoxifylline on hemodynamic, hemorheological, and microcirculatory parameters in young SHRs during arterial hypertension development

• Published in: Clinical and experimental hypertension (1993) Vol. 39; no. 6; pp. 570 - 578
• Main Authors: Plotnikov, Mark B., Aliev, Oleg I., Shamanaev, Alexander Y., Sidekhmenova, Anastasia V., Anfinogenova, Yana, Anishchenko, Anna M., Fomina, Tatiana I., Arkhipov, Alexander M.
• Format: Journal Article
• Language: English
• Published: England Taylor & Francis 18.08.2017; Taylor & Francis Group
• Subjects: Animals; Arterial blood pressure; Blood Pressure - drug effects; blood viscosity; Blood Viscosity - drug effects; Cerebrovascular Circulation - drug effects; Diastole; Erythrocyte Aggregation - drug effects; Erythrocyte Deformability - drug effects; Hematocrit; Hemodynamics - drug effects; Hemorheology - drug effects; Hypertension - drug therapy; Hypertension - physiopathology; microcirculation in visual cortex; Microvessels - drug effects; Microvessels - pathology; pentoxifylline; Pentoxifylline - pharmacology; Pentoxifylline - therapeutic use; Rats; Rats, Inbred SHR; Rats, Inbred WKY; Stroke Volume - drug effects; Vascular Resistance - drug effects; Vasodilator Agents - pharmacology; Vasodilator Agents - therapeutic use; Visual Cortex - blood supply; young SHRs; young SHRs; pentoxifylline; microcirculation in visual cortex; Arterial blood pressure; blood viscosity
• ISSN: 1064-1963; 1525-6006
• DOI: 10.1080/10641963.2017.1291662

The most common form of hypertension in young adults is isolated diastolic hypertension. Diastolic arterial pressure is determined by the total peripheral resistance and depends on both vascular hindrance and blood viscosity. The aim of our work was to study the efficiency of pentoxifylline (PTX) in young spontaneously hypertensive rats (SHRs) during the development of arterial hypertension. The effects of a treatment course with PTX (100 mg/kg/day p.o. for 6 weeks, from 5 to 11 weeks old) on the mean, systolic, and diastolic blood pressure (BP); stroke volume; cardiac output; total peripheral resistance (TPR); whole blood viscosity (BV); plasma viscosity; hematocrit; RBC aggregation and deformability; local cerebral blood flow (lCBF); and microvascularization of the visual cortex were studied in SHRs in comparison with control SHRs and Wistar Kyoto rats. PTX-treated SHRs had significantly lower systolic, diastolic, and mean BP (by 24%, 26%, and 15%, respectively) and BV (by 5-9%) and a higher erythrocyte deformability index (by 1.5-2%), lCBF (by 42%), average diameter of capillaries (by 11%), density of the capillary network (by 23%), and percentage of capillaries with a diameter of 3-7 µm in comparison with control SHRs. In conclusion, PTX exerted positive effects on the hemodynamic, hemorheological, and microcirculatory parameters in SHRs during the development of arterial hypertension.