Digestion of endothelin-1 on cultured vascular smooth muscle cells.
The degradation of 125I-endothelin-1 (125I-ET-1) was examined on cultured porcine aortic endothelial cell (EC) and rat vascular smooth muscle cell (SMC) by HPLC analysis. The degradation of ET-1 was observed on SMC and was slightly observed on EC. Membrane fractions of SMC had a strong potency for the degradation of ET-1 and retained activity even in plasma. This activity was inhibited with some of the noble inhibitors which were known as enkephalinase inhibitors. These results suggest that endothelin degradation enzyme on SMC is related to enkephalinase and that this enzyme plays a significant role in the degradation of ET-1 in vivo.
Tokyo Research Laboratories, Kowa Co., Ltd. Japan.
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T
Edano
K
K
Arai
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T
Koshi
T
T
Torii
T
T
Ohshima
M
M
Hirata
M
M
Ohkuchi
T
T
Okabe
D000818:Animals; D002478:Cells, Cultured; D002851:Chromatography, High Pressure Liquid; D016232:Endothelins / Q000378:metabolism*; D004730:Endothelium, Vascular / Q000166:cytology / Q000378:metabolism; D006868:Hydrolysis; D007457:Iodine Radioisotopes; D008566:Membranes / Q000378:metabolism; D009131:Muscle, Smooth, Vascular / Q000166:cytology / Q000378:metabolism*; D015260:Neprilysin / Q000037:antagonists & inhibitors; D011480:Protease Inhibitors / Q000494:pharmacology; D051381:Rats; D013552:Swine
D016232:Endothelins; D007457:Iodine Radioisotopes; D011480:Protease Inhibitors; D015260:Neprilysin