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English Abstract
Journal Article
[INTERACTION OF BETA-BLOCKER PROPRANOLOL WITH RENIN-ANGIOTENSIN SYSTEM INHIBITORS IN RAT KIDNEY].
Propranolol injection (0.5 mg/kg, s.c.) in anesthetized rats increases diuresis 1.60 times (p < 0.05) with simultaneous 1.54- and 1.62-fold increase (p < 0.05) in sodium and potassium excretion, respectively. Preliminary inhibition of renin-angiotensin system (RAS) activity using ACE inhibitor enalapril (1 mg/kg, orally, 7 days) increases the sensitivity of rat kidney to drug, increasing its diuretic effect 2.33 times, natriuresis 2.49 times, and urine potassium excretion 1.80 times (p < 0.05). After the preliminary insertion of AT1 angiotensin receptor antagonist losartan (1 mg/kg, orally, 7 days), propranolol causes 1.8-fold increase in diuresis, 2.48-fold decrease in urine sodium, and 1.71-fold decrease in kaliuresis (p < 0.05). Preliminary administration of direct renin inhibitor aliskiren (4 mg/kg, orally, 7 days) is accompanied by 2.30-fold increase in the diuretic effect of propranolol, 2.56-fold increase in natriuresis, and 2.27-fold increase in urine potassium excretion (p < 0.05). It is concluded that the renal tissue RAS is involved in the mechanism of propranolol action in the kidney, acting as modulator preventing excessive loss of water and electrolytes with urine.
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