Effect of nicotine on dopaminergic-cholinergic interaction in the striatum

Norbert T. Sandor, Tibor Zelles, Janos Kiss, Henry Sershen, Andras Torocsik, Abel Lajtha, E. Sylvester Vizi

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

We have investigated the effect of nicotinic receptor stimulation on acetylcholine (ACh) release measured by radioassay in rat striatal slices. Since the release of ACh in the striatum is tonically inhibited by endogenous dopamine and nicotine enhances the release of dopamine, we studied the release of ACh when the dopaminergic input was impaired. We used chemical denervation (6-hydroxydopamine pretreatment) or D2-receptor-blockade by sulpiride to remove the dopaminergic control of the cholinergic neurons. In our experiments nicotine failed to increase ACh release from striatal slices taken from rats whose dopaminergic-cholinergic interaction was not impaired but it enhanced the release of ACh from slices dissected from 6-hydroxydopamine pretreated rats or in the presence of sulpiride. Our results provide neurochemical evidence for the existence of nicotinic receptors on striatal cholinergic interneurons. Since the spontaneous release of ACh enhanced by nicotine was inhibited by tetrodotoxin it seems very likely that (-)-nicotine acts on the somatodendritic part of cholinergic interneurons.

Original languageEnglish
Pages (from-to)313-316
Number of pages4
JournalBrain research
Volume567
Issue number2
DOIs
Publication statusPublished - Dec 20 1991

Keywords

  • 6-Hydroxydopamine
  • Acetylcholine release
  • Nicotine
  • Rat striatum
  • Somatodendritic receptor
  • Sulpiride

ASJC Scopus subject areas

  • Neuroscience(all)
  • Molecular Biology
  • Clinical Neurology
  • Developmental Biology

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