Phencyclidine-induced inhibition of striatal acetylcholine release

Comparisons with mu, kappa, and sigma opiate agonists

Steven M. Leventer, Kenneth M. Johnson

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The effects of phencyclidine (PCP) on ACh release were compared to those of morphine, ethylketocyclazocine (EKC), and N-allylnormetazocine (SKF10047) in a superfused striatal slice preparation. The (+)-isomer of the prototypic sigma opiate agonist, SKF10047, and the prototypic kappa opiate agonist, EKC, had essentially the same pharmacological profile as did PCP. That is, they each inhibited ACh release in a concentration dependent manner (with EKC being the most potent) and this effect was antagonized by 0.1 μM naloxone. Since morphine was without effect on ACh release, it is unlikely that these drugs inhibit ACh release by acting at mu receptors. In addition, we observed that the inhibitory effect of PCP, (+) SKF10047, and EKC on ACh release was reversed by 0.1 μM haloperidol. Given that PCP has been shown to stimulate basal DA release in this preparation, it is possible that PCP, EKC and (+) SKF10047 inhibit ACh release indirectly by stimulating DA release. The naloxone-induced blockade of the effect of PCP and these benzomorphans is discussed in relation to the effects of naloxone on other systems known to influence ACh release.

Original languageEnglish (US)
Pages (from-to)793-801
Number of pages9
JournalLife Sciences
Volume34
Issue number8
DOIs
StatePublished - Feb 20 1984

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Opiate Alkaloids
Ethylketocyclazocine
Corpus Striatum
Phencyclidine
Acetylcholine
Naloxone
Morphine
Benzomorphans
mu Opioid Receptor
Haloperidol
Isomers
Pharmacology
Pharmaceutical Preparations

ASJC Scopus subject areas

  • Pharmacology

Cite this

Phencyclidine-induced inhibition of striatal acetylcholine release : Comparisons with mu, kappa, and sigma opiate agonists. / Leventer, Steven M.; Johnson, Kenneth M.

In: Life Sciences, Vol. 34, No. 8, 20.02.1984, p. 793-801.

Research output: Contribution to journalArticle

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