Phosphoramidon, a metalloproteinase inhibitor, suppresses the secretion of endothelin-1 from cultured endothelial cells by inhibiting a big endothelin-1 converting enzyme.

Abstract:

:Time-dependent secretion of immunoreactive-endothelin (IR-ET) from cultured porcine aortic endothelial cells was markedly suppressed by phosphoramidon is due to proteinase inhibitor. Analysis of the culture supernatant with or without phosphoramidon by reverse-phase high performance liquid chromatography confirmed that the suppression of IR-ET secretion by phosphoramidon is due to a decreae in secretion of endothelin-1-like materials. The secretion of the C-terminal fragment (CTF, 22-39)-like materials of big ET-1 was also decreased by phosphoramidon, whereas there was an increased secretion of big ET-1-like materials. These data strongly suggest that phosphoramidon suppresses the secretion of ET-1 from cultured endothelial cells by inhibiting the conversion of big ET-1 to ET-1. It is most likely that phosphoramidon-sensitive metalloproteinase is responsible for the processing of big ET-1 in vascular endothelial cells.

authors

Ikegawa R,Matsumura Y,Tsukahara Y,Takaoka M,Morimoto S

doi

10.1016/0006-291x(90)91198-2

subject

Has Abstract

pub_date

1990-09-14 00:00:00

pages

669-75

issue

2

eissn

0006-291X

issn

1090-2104

pii

0006-291X(90)91198-2

journal_volume

171

pub_type

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