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.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Ikegawa R,Matsumura Y,Tsukahara Y,Takaoka M,Morimoto Sdoi
10.1016/0006-291x(90)91198-2subject
Has Abstractpub_date
1990-09-14 00:00:00pages
669-75issue
2eissn
0006-291Xissn
1090-2104pii
0006-291X(90)91198-2journal_volume
171pub_type
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