Linked Life Data

2158551

Source:http://linkedlifedata.com/resource/pubmed/id/2158551

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1990-5-30
pubmed:abstractText
The rostral ventrolateral medulla is the primary site of action for clonidine, a centrally acting antihypertensive. In the rostral ventrolateral medulla, clonidine binds not only to alpha-2 adrenergic receptors but also to specific imidazole sites. In order to determine whether a putative imidazole receptor mediates the hypotensive action of clonidine, a series of compounds was tested 1) in vitro for binding affinity at imidazole and alpha-2 sites and 2) in vivo for ability to lower arterial pressure and heart rate when microinjected directly into the rostral ventrolateral medulla. Hypotensive potency was correlated with affinity at imidazole sites (r = 0.84), but not with alpha-2 affinity (r = -0.05). The bradycardia elicited by this series of compounds also correlated with affinity at imidazole receptors (r = 0.89), but not with alpha-2 affinity (r = 0.10). Furthermore, the imidazole idazoxan selectively reversed the fall in arterial pressure elicited by clonidine, whereas SKF-86466, an alpha-2 antagonist which is not an imidazole, failed to attenuate clonidine's action. An imidazole receptor in the rostral ventrolateral medulla appears to mediate the central hypotensive actions of clonidine and related centrally acting imidazoles and may participate in the regulation of arterial pressure and heart rate.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0022-3565
pubmed:author
pubmed:issnType
Print
pubmed:volume
253
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
408-18
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1990
pubmed:articleTitle
Role of imidazole receptors in the vasodepressor response to clonidine analogs in the rostral ventrolateral medulla.
pubmed:affiliation
Division of Neurobiology, Cornell University Medical College, New York, New York.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.