Endothelin ETA and ETB receptors mediate vasoconstriction and prostanoid release in the isolated kidney of the rat.
Eur J Pharmacol
; 250(3): 447-53, 1993 Dec 21.
Article
em En
| MEDLINE
| ID: mdl-8112405
ABSTRACT
Endothelin-1 or sarafotoxin 6c (10(-12) to 10(-9) M) induced concentration-dependent increases in perfusion pressure in the isolated perfused kidney of the rat, and increased the release of 6-keto-prostaglandin F1 alpha, prostaglandin E2 and prostaglandin F2 alpha. The pressor effects of endothelin-1 were partially antagonised by BQ-123 (10(-6) M) and more strongly so by the endothelin ETA/B receptor non-selective antagonist PD 145065 (10(-6) M). PD 145065, but not BQ-123, also completely blocked the pressor effects of sarafotoxin 6c. The releases of prostanoids induced by endothelin-1 were greatly reduced by infusion of either BQ-123 or PD 145065, whereas PD 145065, but not BQ-123, strongly antagonised the releases induced by sarafotoxin 6c. These results indicate that the vasoconstrictions and the prostanoid releases induced by the endothelin/sarafotoxin peptides are mediated by the activation of both endothelin ETA and endothelin ETB receptors in the isolated perfused kidney of the rat.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Vasoconstrição
/
Prostaglandinas
/
Receptores de Endotelina
/
Rim
Limite:
Animals
Idioma:
En
Revista:
Eur J Pharmacol
Ano de publicação:
1993
Tipo de documento:
Article
País de afiliação:
Reino Unido