Abstract：
:The conditioned place preference paradigm was used to study the reinforcing properties of D-amphetamine. Rats were injected (i.p.) with D-amphetamine sulphate (0.5, 1.0 or 5.0 mg/kg) and 10 min later confined for 30 min to one side of a shuttle box in which each of the two compartments had distinctive features. On alternate (control) days they received saline injections and were confined for 30 min to the opposite side. At all doses D-amphetamine produced place preference for the distinctive compartment that previously had been associated with the drug. Pretreatment with haloperidol (0.15 or 1.0 mg/kg) antagonized the place preference produced by amphetamine (1.5 mg/kg). By itself, haloperidol (0.15 or 1.0 mg/kg) did not produce place aversion. In separate experiments the D-amphetamine-induced place preference was examined in rats that had received 6-hydroxydopamine (6-OHDA) lesions of the nucleus accumbens. Animals with the greatest depletion of dopamine did not show preference for the compartment associated with D-amphetamine. Furthermore, the time spent on the amphetamine-reinforced side correlated significantly with the levels of dopamine remaining in the nucleus accumbens but not with the dopamine content in the striatum. Depletion of peripheral catecholamines by systemic injections of 6-OHDA did not affect D-amphetamine-induced place preference conditioning. Other groups of animals that received the dopamine receptor agonist, apomorphine, also developed a conditioned preference for the compartment that had been associated with the drug treatment. These findings support the view that the reinforcing effects of D-amphetamine are mediated by central dopamine-containing neurons, and in particular those of the mesolimbic system.
journal_name
Brain Resjournal_title
Brain researchauthors
Spyraki C,Fibiger HC,Phillips AGdoi
10.1016/0006-8993(82)90685-0subject
Has Abstractpub_date
1982-12-16 00:00:00pages
185-93issue
1-2eissn
0006-8993issn
1872-6240pii
0006-8993(82)90685-0journal_volume
253pub_type
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