Linked Life Data

8021927

Source:http://linkedlifedata.com/resource/pubmed/id/8021927

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
12
pubmed:dateCreated
1994-8-3
pubmed:abstractText
IBI [2-(4'-isothiocyanatobenzyl)imidazoline, 3] has been shown to cause slow-onset, long-lasting contractions of rat thoracic aorta through a non-alpha-adrenergic receptor (non-alpha-AR) mediated mechanism. A series of IBI-related anlogs 7-14 and 16 was prepared to determine the structural requirements for the interaction with non-alpha-AR in rat aortic strips. All IBI analogs produced concentration-dependent contractile responses on rat thoracic aorta. Whereas the actions of analogs 7, 14, and 16 were partly mediated by alpha-ARs, the stimulatory activities of the remaining IBI analogs were unaffected by phenoxybenzamine pretreatment, suggesting that a non-alpha-adrenergic mechanism is involved. We have shown that the contractile actions of IBI and analogs 10-13 were not blocked with the imidazoline/guanidinium receptive site (IGRS) ligands idazoxan, cirazoline, or clonidine. However, the calcium channel blockers nifedipine or verapamil shifted the concentration-response curve of IBI and its analogs 10-13 to the right and reduced the maximal contractile responses. The action of IBI on rat thoracic aorta was reduced by the omission of extracellular calcium in the medium. These results suggest that the stimulatory activities of IBI and analogs 10-13 are not related to the activation of alpha-AR or IGRS receptors and are likely coupled to the voltage-dependent Ca2+ channels.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0022-2623
pubmed:author
pubmed:issnType
Print
pubmed:day
10
pubmed:volume
37
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1874-81
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1994
pubmed:articleTitle
Synthesis and biological activities of a new set of irreversibly acting 2-(4'-isothiocyanatobenzyl)imidazoline analogs in rat thoracic aorta.
pubmed:affiliation
Division of Medicinal Chemistry/Pharmacognosy, College of Pharmacy, Ohio State University, Columbus 43210.
pubmed:publicationType
Journal Article, In Vitro, Research Support, U.S. Gov't, P.H.S.