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A potent and specific agonist, Suc-[Glu9,Ala11,15]-endothelin-1(8-21), IRL 1620, for the ETB receptor.

Abstract：

:A series of C-terminal linear peptides of endothelin (ET)-1 and their N alpha-succinyl (Suc) analogs were synthesized and their binding affinities for the two subtypes of ET receptor, ETA and ETB, in porcine lung membranes were examined. Among the synthetic analogs, Suc-[Glu9,Ala11,15]-ET-1(8-21), IRL 1620, was the most potent and specific ligand for the ETB receptor (KiETA/KiETB approximately equal to 120,000) as judged by the Ki values for ETA (1.9 microM) and ETB (16 pM) receptors. IRL 1620 was 60 times more selective for the ETB receptor than ET-3 (KiETA/KiETB approximately equal to 1,900). IRL 1620 (10(-9)-10(-7) M) induced contractions of the guinea pig trachea with a comparable potency to those of ET-1 or ET-3, suggesting that IRL 1620 is a potent ETB receptor agonist.

journal_name

Biochem Biophys Res Commun

journal_title

Biochemical and biophysical research communications

authors

Takai M,Umemura I,Yamasaki K,Watakabe T,Fujitani Y,Oda K,Urade Y,Inui T,Yamamura T,Okada T

doi

10.1016/0006-291x(92)90683-c

subject

Has Abstract

pub_date

1992-04-30 00:00:00

pages

953-9

issue

2

eissn

0006-291X

issn

1090-2104

pii

0006-291X(92)90683-C

journal_volume

184

pub_type

杂志文章

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