ISSN:
1432-1912
Keywords:
Amphetamine
;
Corpus striatum
;
Endogenous dopamine
;
Dopamine release
;
Reserpine
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Summary The release of endogenous dopamine evoked by electrical stimulation or by exposure to (+)-amphetamine (10 μM) was determined in superfused striatal slices of the rat. The spontaneous and the electrically-evoked release of dopamine were significantly increased in the presence of nomifensine (10 μM). After reserpine pretreatment (5 mg/kg, s.c., 24 h), the striatal dopamine content was reduced by about 90%. Exposure to 10 μM (+)-amphetamine during 2 min released similar amounts of dopamine from striatal slices of untreated or reserpine pretreated rats. Similar results were obtained when monoamine oxidase activity was inhibited in vivo with pargyline. Pretreatment with reserpine does not modify the (+)-amphetamine-induced release of dopamine, in spite of the marked reduction of the striatal dopamine content. These results provide direct evidence for the view that (+)-amphetamine releases dopamine from a special, reserpine-resistant pool of newly synthetized transmitter.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00501200
