Linked Life Data

8105762

Source:http://linkedlifedata.com/resource/pubmed/id/8105762

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
1993-11-16
pubmed:abstractText
The 5-HT1A ligand, spiroxatrine, displays very low affinity for alpha 1-adrenergic binding sites and a relatively high affinity for alpha 2-adrenergic binding sites. Nonetheless, recent functional studies indicate that spiroxatrine is a potent antagonist of the alpha 1-adrenoceptor mediating contraction in the rat isolated aorta. On the basis of the widely studied heterogeneous interaction of drugs with alpha-adrenoceptors in several experimental models, the present study was designed to analyze the alpha-adrenoceptor antagonist properties of spiroxatrine in the pithed rat. Animals were prepared for recording of arterial blood pressure and intravenous (i.v.) administration of drugs. Norepinephrine and the alpha 1- and alpha 2- adrenoceptor agonists methoxamine and clonidine, respectively, elicited pressor responses in a dose-related fashion. Spiroxatrine (1 mg/kg, i.v.) produced a moderate--but significant--rightward displacement of the dose-response curves to all agonists. The present data lead us to suggest that, though spiroxatrine exhibits alpha 1- and alpha 2-adrenoceptor antagonist properties in the pithed rat, its potency does not seem to correlate with that found in rat aorta. The potential involvement of alpha 1-adrenoceptor subtypes is discussed.
pubmed:language
spa
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0020-3785
pubmed:author
pubmed:issnType
Print
pubmed:volume
63
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
289-95
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:articleTitle
[The alpha-antiadrenergic properties of spiroxatrine, a ligand of serotonergic 5-HT1A receptors].
pubmed:affiliation
Departamento de Farmacología y Toxicología, Centro de Investigación y de Estudios Avanzados, Instituto Politécnico Nacional, México, D.F.
pubmed:publicationType
Journal Article, Comparative Study, English Abstract