Linked Life Data

9694922

Source:http://linkedlifedata.com/resource/pubmed/id/9694922

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1998-9-2
pubmed:abstractText
The conditioned place preference (CPP) induced by increasing doses (1.25-40 mg/kg) of cocaine or the specific dopamine uptake inhibitor GBR12783 was investigated in rats previously treated with cocaine (10 or 20 mg/kg), GBR12783 (10 mg/kg) or morphine (10 mg/kg) for 15 days. In solvent-pretreated rats, cocaine- and GBR12783-induced CPPs were biphasic, with the highest scores observed at 20 mg/kg. Prior exposure to GBR12783 sensitized the rats to the rewarding effects of low doses of either GBR12783 or cocaine. Pretreatment with cocaine 20 mg/kg, but not 10 mg/kg, sensitized the rats to its own rewarding effects. Furthermore, it was less efficient than GBR12783 in sensitizing the animals to the rewarding effects of both drugs. These data confirm the major role of dopamine uptake inhibition in the sensitization process. On the other hand, the magnitude of CPP induced by a high dose of both drugs (20 mg/kg) was decreased after pretreatment with either GBR12783 or cocaine, reaching the lower scores observed at 40 mg/kg. This decrease was unrelated to altered anxiety level but was associated with sensitization to stereotypies. Morphine pretreatment modified neither the CPP induced by high doses of cocaine or GBR12783 nor cocaine- or GBR12783-induced stereotypies. However, prior exposure to morphine sensitized the rats to the rewarding effects of cocaine (2.5 mg/kg) but not to those of GBR12783, suggesting that other mechanisms working in concert with dopamine may facilitate the rewarding effect of cocaine without affecting that of GBR12783.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0022-3565
pubmed:author
pubmed:issnType
Print
pubmed:volume
286
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
688-96
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1998
pubmed:articleTitle
Sensitization to the rewarding effects of the specific dopamine uptake inhibitor GBR12783.
pubmed:affiliation
Unité de Neuropsychopharmacologie Expérimentale, U.P.R.E.S.A. 6036 du C.N.R.S., Institut Fédératif de Recherche Multidisciplinaire sur les Peptides, Faculté de Médecine et Pharmacie de Rouen, Rouen, France.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't