Differences in the time course of haloperidol-induced up-regulation of rat striatal and mesolimbic dopamine receptors

Elisabeth S. Prosser*, John G. Csernansky, Leo E. Hollister

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Regional differences in the onset and persistence of increased dopamine D2 receptor density in rat brain were studied following daily injections of haloperidol for 3, 7, 14, or 28 days. Striatal [3H] - spiroperidol Bmax values were significantly increased following 3 - 28 days of haloperidol treatment, as compared to saline controls. Olfactory tubercle Bmax values were significantly increased only after 14 or 28 days of haloperidol treatment. Nucleus accumbens Bmax values were significantly increased only in the 14-day drug treatment group, suggesting that dopamine D2 receptor up-regulation in nucleus accumbens may reverse during ongoing neuroleptic treatment. These findings suggest that important differences in adaptive responses to chronic dopamine blockade may exist between dopaminergic synapses located in various rat brain regions.

Original languageEnglish (US)
Pages (from-to)715-720
Number of pages6
JournalLife Sciences
Volume43
Issue number8
DOIs
StatePublished - 1988

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Pharmacology, Toxicology and Pharmaceutics(all)

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