Document Detail

Enhancement of dopamine release from striatal slices of rats that were subchronically treated with methamphetamine.
MedLine Citation:
PMID:  3408757     Owner:  NLM     Status:  MEDLINE    
The effect of dopamine (DA) uptake inhibitors (methamphetamine, nomifensine, and phenylethylamine) on the release of endogenous DA from striatal slices of rats pretreated with methamphetamine (6 mg/kg/day for 9 days) was investigated. The exposure of methamphetamine-pretreated rat striatal slices to a low concentration (10(-7) M, 5 X 10(-7) M) of methamphetamine caused a greater increase in DA efflux than that of saline-treated rat striatal slices. The drug-treated rats displayed an enhanced stereotyped behavioral response to a small dose of methamphetamine (1 mg/kg). Removal of Ca2+ from the superfusion medium did not affect the difference in the rates of methamphetamine (10(-7) M) induced DA release between methamphetamine-treated and saline-treated rat striatal slices. Nomifensine- and phenylethylamine-induced DA release from striatal slices was also enhanced by repeated administration of methamphetamine. On the other hand, there was no difference in K+-induced DA release between the two groups. Moreover, repeated administration of methamphetamine caused a significant increase in 3H-dopamine uptake in rat striatal synaptosomes. These results suggest that the behavioral sensitization produced by the repeated administration of methamphetamine is accompanied by an enhancement in the release of DA induced by methamphetamine, nomifensine, and phenylethylamine in vitro and is also accompanied by increased DA uptake into striatal synaptosomes.
S Yamada; H Kojima; H Yokoo; T Tsutsumi; K Takamuki; S Anraku; S Nishi; K Inanaga
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Biological psychiatry     Volume:  24     ISSN:  0006-3223     ISO Abbreviation:  Biol. Psychiatry     Publication Date:  1988 Aug 
Date Detail:
Created Date:  1988-10-13     Completed Date:  1988-10-13     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0213264     Medline TA:  Biol Psychiatry     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  399-408     Citation Subset:  IM    
Institute of Brain Diseases, Kurume University School of Medicine, Japan.
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MeSH Terms
Corpus Striatum / drug effects*,  metabolism
Culture Techniques
Dopamine / metabolism*
Methamphetamine / pharmacology*
Rats, Inbred Strains
Receptors, Dopamine / drug effects
Stereotyped Behavior / drug effects
Synaptosomes / drug effects
Reg. No./Substance:
0/Receptors, Dopamine; 537-46-2/Methamphetamine

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