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Structure-activity relationships of C-terminal endothelin hexapeptide antagonists.

Abstract：

:The discovery of selective endothelin (ET) receptor antagonists will facilitate identification of the physiological and pathological roles for ET and its isopeptides. Structure-activity studies of the C-terminal hexapeptide of ET have been carried out to elucidate those amino acids important for receptor binding and agonist or antagonist activity. Binding studies were performed in rat heart ventricle, rabbit renal artery vascular smooth muscle cells, and rat cerebellum. In addition, many of the compounds have been evaluated functionally for their effects on endothelin-1-induced arachidonic acid release and inositol phosphate accumulation in specific cell lines. Selected compounds have been evaluated in a functional bioassay in tissue preparations specifically expressing either ETA or ETB receptors. We have previously described the structure-activity relationships in the hydrophobic C-terminal hexapeptide of ET, a region known to be highly important for receptor recognition. A mono-D-amino acid scan of the ET[16-21] revealed that substitution at His gave rise to analogs with significantly enhanced binding affinity. We have further evaluated the C-terminal region and will describe the design, synthesis, and pharmacological evaluation of several novel and potent ET peptide receptor antagonists.

journal_name

J Med Chem

journal_title

Journal of medicinal chemistry

authors

Doherty AM,Cody WL,DePue PL,He JX,Waite LA,Leonard DM,Leitz NL,Dudley DT,Rapundalo ST,Hingorani GP

doi

10.1021/jm00070a001

subject

Has Abstract,Author List Incomplete

pub_date

1993-09-03 00:00:00

pages

2585-94

issue

18

eissn

0022-2623

issn

1520-4804

journal_volume

36

pub_type

杂志文章

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