Linked Life Data

7526957

Source:http://linkedlifedata.com/resource/pubmed/id/7526957

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1-2
pubmed:dateCreated
1995-1-3
pubmed:abstractText
Using in vivo microdialysis, this study attempted to determine whether a neurochemical predisposition to self-administer cocaine could be identified. Estimated extracellular levels of dopamine and its metabolites were measured bilaterally in the mesocorticolimbic and nigrostriatal systems of naive rats that were subsequently trained to self-administer cocaine intravenously. There were several significant relationships between dopamine and dopamine metabolite (3,4-dihydroxyphenylacetic acid and homovanillic acid) levels and rates of cocaine self-administration during both acquisition and asymptotic phases of testing. Dopamine levels in the nucleus accumbens were non-monotonically related to rates of self-administration during both phases: low to moderate dopamine levels were positively correlated with self-administration rates whereas moderate to high dopamine levels were negative correlated with self-administration rates. Dopamine, DOPAC (3,4-dihydroxyphenylacetic acid) and HVA (homovanillic acid) levels in the striatum were inversely correlated with self-administration rates during the acquisition phase. DOPAC and HVA levels in the left and right sides of the medial prefrontal cortex were positively and negatively correlated, respectively, with self-administration rates during the asymptotic phase; left/right asymmetrics in cortical metabolite levels were also correlated with asymptotic rates. There were no significant relationships between any neurochemical indices and rates of bar-pressing for water. These results suggest that the normal variability in drug seeking behavior is at least in part attributable to individual differences in the activity of brain dopamine systems.(ABSTRACT TRUNCATED AT 250 WORDS)
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0006-8993
pubmed:author
pubmed:issnType
Print
pubmed:day
8
pubmed:volume
653
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
148-54
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1994
pubmed:articleTitle
Neurochemical predisposition to self-administer cocaine in rats: individual differences in dopamine and its metabolites.
pubmed:affiliation
Department of Pharmacology and Toxicology (A-136), Albany Medical College, NY 12208.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.