Abstract
Endothelin is a newly discovered, potent vasoconstrictor peptide secreted by endothelial cells. The binding of endothelin was studied on cultured human vascular smooth muscle cells obtained from umbilical veins. A single specific binding site for 125I-endothelin was identified, with an apparent Kd of 126 pM and a maximal binding capacity of approximately 10,000 sites per smooth muscle cell. At room temperature the binding was saturable, reached equilibrium at 2 h (using 20 pM endothelin), and was slowly and only partially reversed by unlabeled endothelin. The calcium antagonists nifedipine, nicardipine, and diltiazem did not compete for the same binding site. Conditioned medium from cultured human umbilical vein endothelial cells inhibited the binding of 125I-endothelin dose dependently. This effect was antagonized by anti-endothelin antiserum. We conclude that human umbilical vein smooth muscle cells possess specific binding sites for endothelin, and that human endothelial cells secrete an endothelinlike material.
Full text
PDF
Images in this article
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Gimbrone M. A., Jr, Cotran R. S. Human vascular smooth muscle in culture. Growth and ultrastructure. Lab Invest. 1975 Jul;33(1):16–27. [PubMed] [Google Scholar]
- Hickey K. A., Rubanyi G., Paul R. J., Highsmith R. F. Characterization of a coronary vasoconstrictor produced by cultured endothelial cells. Am J Physiol. 1985 May;248(5 Pt 1):C550–C556. doi: 10.1152/ajpcell.1985.248.5.C550. [DOI] [PubMed] [Google Scholar]
- Hirata Y., Yoshimi H., Takata S., Watanabe T. X., Kumagai S., Nakajima K., Sakakibara S. Cellular mechanism of action by a novel vasoconstrictor endothelin in cultured rat vascular smooth muscle cells. Biochem Biophys Res Commun. 1988 Aug 15;154(3):868–875. doi: 10.1016/0006-291x(88)90220-3. [DOI] [PubMed] [Google Scholar]
- Itoh Y., Yanagisawa M., Ohkubo S., Kimura C., Kosaka T., Inoue A., Ishida N., Mitsui Y., Onda H., Fujino M. Cloning and sequence analysis of cDNA encoding the precursor of a human endothelium-derived vasoconstrictor peptide, endothelin: identity of human and porcine endothelin. FEBS Lett. 1988 Apr 25;231(2):440–444. doi: 10.1016/0014-5793(88)80867-6. [DOI] [PubMed] [Google Scholar]
- Jaffe E. A., Nachman R. L., Becker C. G., Minick C. R. Culture of human endothelial cells derived from umbilical veins. Identification by morphologic and immunologic criteria. J Clin Invest. 1973 Nov;52(11):2745–2756. doi: 10.1172/JCI107470. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Kloog Y., Ambar I., Sokolovsky M., Kochva E., Wollberg Z., Bdolah A. Sarafotoxin, a novel vasoconstrictor peptide: phosphoinositide hydrolysis in rat heart and brain. Science. 1988 Oct 14;242(4876):268–270. doi: 10.1126/science.2845579. [DOI] [PubMed] [Google Scholar]
- O'Brien R. F., Robbins R. J., McMurtry I. F. Endothelial cells in culture produce a vasoconstrictor substance. J Cell Physiol. 1987 Aug;132(2):263–270. doi: 10.1002/jcp.1041320210. [DOI] [PubMed] [Google Scholar]
- Skalli O., Ropraz P., Trzeciak A., Benzonana G., Gillessen D., Gabbiani G. A monoclonal antibody against alpha-smooth muscle actin: a new probe for smooth muscle differentiation. J Cell Biol. 1986 Dec;103(6 Pt 2):2787–2796. doi: 10.1083/jcb.103.6.2787. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Tomobe Y., Miyauchi T., Saito A., Yanagisawa M., Kimura S., Goto K., Masaki T. Effects of endothelin on the renal artery from spontaneously hypertensive and Wistar Kyoto rats. Eur J Pharmacol. 1988 Aug 2;152(3):373–374. doi: 10.1016/0014-2999(88)90736-4. [DOI] [PubMed] [Google Scholar]
- Yanagisawa M., Kurihara H., Kimura S., Tomobe Y., Kobayashi M., Mitsui Y., Yazaki Y., Goto K., Masaki T. A novel potent vasoconstrictor peptide produced by vascular endothelial cells. Nature. 1988 Mar 31;332(6163):411–415. doi: 10.1038/332411a0. [DOI] [PubMed] [Google Scholar]