Linked Life Data

10963753

Source:http://linkedlifedata.com/resource/pubmed/id/10963753

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
11
pubmed:dateCreated
2000-11-3
pubmed:abstractText
Ligand:receptor interactions were analysed at wild-type, Asp(79)Asn and Thr(373)Lys alpha(2A) AR by measuring Ca(++) responses in the co-presence of a G(alpha 15) protein in CHO-K1 cells. (-)-Adrenaline displayed a time-dependent Ca(++) response with the following magnitude: wt alpha(2A) AR>Thr(373)Lys alpha(2A) AR>Asp(79)Asn alpha(2A) AR. The maximal amplitude of activation by d-medetomidine and clonidine versus that of (-)-adrenaline was not affected by the Asp(79)Asn mutation, whereas it was significantly lower for both UK 14304 (-42%) and oxymetazoline (-35%). BHT 920 induced a higher Ca(++) response (+19%) at the Asp(79)Asn alpha(2A) AR. Some (atipamezole>BRL 44408=idazoxan approximately SKF 86466>dexefaroxan) but not all (RX 811059 and RS 15385) of the putative alpha(2) AR antagonists tested also displayed partial agonist properties at the Asp(79)Asn alpha(2A) AR. At the Thr(373)Lys alpha(2A) AR, high-efficacy responses were produced by each of the agonists, whereas the putative antagonists showed the following rank order of maximal responses: BRL 44408>SKF 86466>atipamezole approximately idazoxan>dexefaroxan. The observed heterogeneity of Ca(++) responses produced by different ligands at wt and mutant alpha(2A) AR may be explained by assuming the existence of multiple ligand activation binding sites at the alpha(2A) AR.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0028-3908
pubmed:author
pubmed:issnType
Print
pubmed:day
23
pubmed:volume
39
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2101-11
pubmed:dateRevised
2010-11-18
pubmed:meshHeading
pubmed:year
2000
pubmed:articleTitle
Heterogeneous ligand-mediated Ca(++) responses at wt and mutant alpha(2A)-adrenoceptors suggest multiple ligand activation binding sites at the alpha(2A)-adrenoceptor.
pubmed:affiliation
Centre de Recherche Pierre Fabre, Department of Cellular and Molecular Biology, 17, avenue Jean Moulin, 81106 Castres Cédex, France. peter.pauwels@pierre-fabre.com
pubmed:publicationType
Journal Article