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Effects of Hoe 140, a bradykinin B2-receptor antagonist, on renal function in conscious normotensive rats

Madeddu, Paolo Roberto and Anania, Vittorio Domenico and Demontis, Maria Piera and Varoni, Maria Vittoria and Pisanu, Gavino and Troffa, Chiara and Tonolo, Giancarlo and Glorioso, Nicola and Pinna Parpaglia, Paolo (1992) Effects of Hoe 140, a bradykinin B2-receptor antagonist, on renal function in conscious normotensive rats. British journal of pharmacology, Vol. 106 (2), p. 380-386. ISSN 0007-1188. eISSN 1476-5381. Article.

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DOI: 10.1111/j.1476-5381.1992.tb14344.x

Abstract

The present study was designed to determine if endogenous kinins are involved in the regulation of arterial blood pressure and renal function in conscious rats given deoxycorticosterone enantate (DOC, 25 mg kg−1, s.c., weekly) or vehicle for two weeks.
The bradykinin B2-receptor antagonist, d-Arg[Hyp3,Thi5,d-Tic7,Oic8]-bradykinin (Hoe 140), at a dose of 300 μg kg−1, s.c., blocked the hypotensive effect of 300 ng kg−1 bradykinin i.a., but it did not alter the blood pressure lowering action of 300 ng kg−1 acetylcholine or prostaglandin E2. Inhibition of the response to bradykinin persisted up to 6 h after the administration of Hoe 140.
Administration of 300 μg kg−1 Hoe 140 s.c. four times a day did not alter mean blood pressure, renal blood flow, or renal function in rats given DOC-vehicle. However, it decreased urinary volume by 70% (from 48.2 ± 3.8 to 14.3 ± 3.7 ml 24 h−1, P < 0.01) and urinary secretion of sodium by 54% (from 1.02 ± 0.05 to 0.47 ± 0.16 mmol 24 h−1, P < 0.01) and potassium by 30% (from 2.93 ± 0.15 to 2.04 ± 0.15 mmol 24 h−1, P < 0.05) in DOC-treated rats. Mean blood pressure, glomerular filtration rate and total renal blood flow remained unchanged.
Our results suggest that endogenous kinins play a role in the regulation of renal excretion of water and sodium in the presence of elevated levels of DOC.

Item Type:Article
ID Code:9989
Status:Published
Refereed:Yes
Uncontrolled Keywords:Kinin antagonist, Hoe 140, bradykinin, kallikrein, renal blood flow, renal function, blood pressure
Subjects:Area 07 - Scienze agrarie e veterinarie > VET/07 Farmacologia e tossicologia veterinaria
Area 06 - Scienze mediche > MED/09 Medicina interna
Divisions:001 Università di Sassari > 01 Dipartimenti > Biologia animale
Publisher:Wiley
ISSN:0007-1188
eISSN:1476-5381
Additional Information:Article first published online: 19 JUL 2012.
Deposited On:23 Jul 2014 10:43

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