The effect of chronic L-dopa administration on supersensitive pre- and postsynaptic dopaminergic receptors in rat brain.

Published

Journal Article

Chronic administration of haloperidol induced supersensitivity of the pre- and postsynaptic dopaminergic receptors in rat brain. The response of the presynaptic receptors was determined by an enhanced inhibitory effect of apomorphine on dopamine synthesis after gamma-butyrolactone injection. This change in the receptor function was detected both in the nigrostriatal and mesolimbic pathways. Haloperidol also increased the 3H-spiperone binding sites in striatal membranes, indicating supersensitivity of the postsynaptic receptors. Subsequent prolonged treatment with high doses of L-DOPA/carbidopa resulted in a decrease in 3H-spiperone binding sites, but had no effect on the supersensitive presynaptic receptors. It is suggested that tardive dyskinesia may be a state of both pre- and postsynaptic dopamine receptor supersensitivity and that chronic L-DOPA treatment may have a differential effect on these sites.

Full Text

Duke Authors

Cited Authors

  • Reches, A; Wagner, HR; Jiang, D; Jackson, V; Fahn, S

Published Date

  • July 5, 1982

Published In

Volume / Issue

  • 31 / 1

Start / End Page

  • 37 - 44

PubMed ID

  • 7109853

Pubmed Central ID

  • 7109853

International Standard Serial Number (ISSN)

  • 0024-3205

Digital Object Identifier (DOI)

  • 10.1016/0024-3205(82)90398-8

Language

  • eng

Conference Location

  • Netherlands