Endothelin-1-induced constriction in the coronary resistance vessels and abdominal aorta of the guinea pig
dc.contributor.author | Webb, R. Clinton | en_US |
dc.contributor.author | Joshua, Irving G. | en_US |
dc.contributor.author | Folta, Anne | en_US |
dc.date.accessioned | 2006-09-08T19:25:12Z | |
dc.date.available | 2006-09-08T19:25:12Z | |
dc.date.issued | 1990-12 | en_US |
dc.identifier.citation | Folta, Anne; Joshua, Irving G.; Webb, R. Clinton; (1990). "Endothelin-1-induced constriction in the coronary resistance vessels and abdominal aorta of the guinea pig." Heart and Vessels 5(4): 206-211. <http://hdl.handle.net/2027.42/41586> | en_US |
dc.identifier.issn | 0910-8327 | en_US |
dc.identifier.issn | 1615-2573 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/41586 | |
dc.identifier.uri | http://www.ncbi.nlm.nih.gov/sites/entrez?cmd=retrieve&db=pubmed&list_uids=2228908&dopt=citation | en_US |
dc.description.abstract | The purpose of this study was to examine contractile properties of endothelin-1, a newly discovered vasoactive peptide, in guinea pig coronary resistance vessels and abdominal aorta. Changes in perfusion pressure after injections of endothelin-1 were measured using a constant-flow modified Langendorff preparation. The ED 10 values of coronary perfusion pressure were about 100-fold less for endothelin-1 than for prostaglandin F 2α . After the endothelium was damaged by exposure to free radicals, maximal coronary constriction in response to endothelin-1 (10 −9 moles) was not altered, whereas dilator responses to low doses of endothelin-1 were converted to constrictor responses. Removal of the endothelium from aortic rings significantly increased responsiveness to endothelin-1 and the maximal response to the peptide. In calcium-free medium, endothelin-1 induced small increases both in perfusion pressure in coronary vessles and in tension in the aorta. Reintroduction of calcium in the coronary and aortic preparations produced a rapid increase in perfusion pressure and tension, respectively. Further, endothelin-1-induced coronary constriction was inhibited 59%±7% by nifedipine (10 −7 moles). We conclude that endothelin-1 is a more potent constrictor than prostaglandin F 2α in the coronary vasculature. Endothelin-1-induced constriction in the coronary vasculature of the guinea pig is not mediated through an endogenous constricting factor released from the endothelium or a constrictor prostaglandin. Further, endothelin-1-induced dilation in the coronary vasculature and attenuation of endothelin-1-induced contraction in the abdominal aorta of the guinea pig are mediated through the release of a factor from the endothelium. Endothelin-1-induced coronary constriction and abdominal aortic contraction require extracellular calcium, entering, in part, through nifedipine-sensitive channels. | en_US |
dc.format.extent | 810009 bytes | |
dc.format.extent | 3115 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.language.iso | en_US | |
dc.publisher | Springer-Verlag | en_US |
dc.subject.other | Cardiology | en_US |
dc.subject.other | Medicine & Public Health | en_US |
dc.subject.other | Biomedical Engineering | en_US |
dc.subject.other | Interventional Radiology | en_US |
dc.subject.other | Ultrasound | en_US |
dc.subject.other | Vascular Endothelium | en_US |
dc.subject.other | Vascular Surgery | en_US |
dc.subject.other | Nifedipine | en_US |
dc.subject.other | Calcium | en_US |
dc.subject.other | Cardiac Surgery | en_US |
dc.title | Endothelin-1-induced constriction in the coronary resistance vessels and abdominal aorta of the guinea pig | en_US |
dc.type | Article | en_US |
dc.subject.hlbsecondlevel | Internal Medicine and Specialties | en_US |
dc.subject.hlbtoplevel | Health Sciences | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Department of Physiology, University of Michigan, 48109, Ann Arbor, MI | en_US |
dc.contributor.affiliationum | Department of Physiology, University of Michigan, 48109, Ann Arbor, MI | en_US |
dc.contributor.affiliationother | Department of Physiology, University of Louisville, 40292, Louisville, KY | en_US |
dc.contributor.affiliationumcampus | Ann Arbor | en_US |
dc.identifier.pmid | 2228908 | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/41586/1/380_2005_Article_BF02058691.pdf | en_US |
dc.identifier.doi | http://dx.doi.org/10.1007/BF02058691 | en_US |
dc.identifier.source | Heart and Vessels | en_US |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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