ISSN:
1432-2072
Keywords:
d-Amphetamine
;
Supersensitivity
;
Nucleus accumbens
;
Apomorphine
;
Chronic
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Abstract Treatment of rats with d-amphetamine (5 mg/kg) once daily for 25 days did not change locomotor responses, on day 7 of withdrawal, to dopamine (DA) or d-amphetamine into the nucleus accumbens. Nor was there a change in 3H-spiperone binding of caudate nucleus membranes. There was no effect of treatment on the locomotor response of rats to 1.0, 1.5 or 2.0 mg/kg d-amphetamine IP. However, d-amphetamine-treated rats were significantly less sensitive to 0.5 mg d-amphetamine. Although 1, 2 or 3 mg/kg apomorphine produced the same degree of stereotypy in both treatment groups, there was a significant difference in the response of the two groups to 0.5 mg apomorphine, d-amphetamine-treated animals being less sensitive than vehicle-treated animals. No change was found in brain DA levels with or without synthesis inhibition. The present data do not support the hypothesis that chronic treatment of rats with d-amphetamine can produce supersensitive post-synaptic DA receptors.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00422417
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