Linked Life Data

17686497

Source:http://linkedlifedata.com/resource/pubmed/id/17686497

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2007-12-31
pubmed:abstractText
CB1 receptor agonists increase the state of phosphorylation of the dopamine and cAMP-regulated phosphoprotein of 32 kDa (DARPP-32) at the cAMP-dependent protein kinase site, Thr 34. This effect, which occurs in the medium spiny neurons of the striatum, has been proposed to mediate the motor depressant action of cannabinoids. In this study, we have examined the effect produced by systemic administration of Delta(9)-tetrahydrocannabinol (THC), the major component of marihuana and hashish, on DARPP-32. We show that THC increases DARPP-32 phosphorylation at Thr 34 both in dorsal striatum and nucleus accumbens. Time-course and dose-response experiments indicate that DARPP-32 phosphorylation is maximal 30 min following administration of 10mg/kg of THC. The THC-mediated increase in DARPP-32 phosphorylation is reduced by administration of the CB1 receptor antagonist, SR141716A (3mg/kg). A similar attenuation of the effect of THC is also exerted by suppression of cAMP signaling achieved using the dopamine D1 receptor antagonist, SCH23390 (0.125 mg/kg), or the adenosine A2A receptor antagonist, KW6002 (3mg/kg). These results indicate that, in the striatum, THC promotes PKA-dependent phosphorylation of DARPP-32 in striatal medium spiny neurons expressing dopamine D1 and adenosine A2A receptors.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0028-3908
pubmed:author
pubmed:issnType
Print
pubmed:volume
54
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
31-5
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
2008
pubmed:articleTitle
Regulation of DARPP-32 phosphorylation by Delta9-tetrahydrocannabinol.
pubmed:affiliation
Department of Neuroscience, Karolinska Institutet, Retzius väg 8, 17177 Stockholm, Sweden.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't, Research Support, N.I.H., Extramural