Abstract
The effect of a new derivative of GABA, the compound RGPU-260, on the heart contractility of rats exposed to chronic alcohol intoxication (10% ethanol solution for 24 weeks) was studied. In comparison with intact rats, the alcoholized ones were characterized with smaller increments in the rates of myocardial contraction (+dP/dtmax) and relaxation (-dP/dtmax), left ventricular pressure, and maximum intensity of functioning of structures during the load tests (volume load/preload, stimulation of the cardiac adrenergic receptors, and occlusion of the ascending aorta/afterload) attesting to degraded cardiac contractility function. In rats treated with RGPU-260 (daily, 25 mg/kg intragastrically during 14 days), these parameters were higher in comparison with control values indicating a positive action of the examined agent on inotropic function of the heart. Effectiveness of cardiotropic action of RGPU-260 was comparable to that of the reference drug mildronate.
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