Depletion of striatal dopamine transporter does not affect psychostimulant-induced locomotor activity

Yossef Itzhak, Julio L. Martin, Syed F. Ali, Michael D. Norenberg

Research output: Contribution to journalArticle

15 Scopus citations

Abstract

THE effect of neurotoxin-induced depletion of striatal dopamine transporter (DAT) binding sites on animals' responses to psychostimulants was investigated. Multiple 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) or methamphetamine (METH) injections but not a single METH injection to Swiss Webster mice resulted in > 60% depletion of striatal DAT. MPTP-induced depletion of DAT did not affect METH- and cocaine-stimulated locomotor activity compared with the response of control mice. Pre-exposure to either the neurotoxic or the single non-neurotoxic dose of METH resulted in a marked locomotor sensitization in response to METH or cocaine challenge injections. The present results indicate that > 60% loss in striatal DAT binding sites has no effect on animals' responses to psychostimulants, and suggest that neural systems other than striatal DAT may contribute to the induction of locomotor sensitization to METH and cocaine.

Original languageEnglish (US)
Pages (from-to)3245-3249
Number of pages5
JournalNeuroreport
Volume8
Issue number15
DOIs
StatePublished - Jan 1 1997

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Keywords

  • 1- Methyl-4-phenyl 1,2,3,6-tetrahydropyridine (MPTP)
  • Cocaine
  • Dopamine transporter
  • Locomotor sensitization
  • Methamphetamine

ASJC Scopus subject areas

  • Neuroscience(all)

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