Peripheral and central actions of AF64A (ethylcholine mustard aziridinium ion) on acetylcholine release, in vitro: Comparison with hemicholinium

P. E. Potter, L. G. Harsing, I. Kakucska, G. Gaal, E. S. Vizi

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The acute effects of ethylcholine mustard aziridinium ion (AF64A) and hemicholinium-3 (HC-3) on the release of endogenous acetylcholine (ACh) from isolated tissues were examined. Whereas addition of HC-3 (10-6-10-5 M) significantly reduced the output of ACh from isolated guinea-pig ileum longitudinal muscle strip elicited by 10 Hz stimulation, AF64A had no effect and even enhanced the release of radiolabel elicited by 1 Hz stimulation when this tissue was pre-loaded with [3H]choline. Similarly, HC-3 (10-5 M) reduced ouabain-induced endogenous ACh release from isolated rat hippocampus. Addition of AF64A (10-5-5 × 10-5 M) caused a slight increase in ACh release. In isolated rat cortex, however, AF64A did not affect ACh release. Moreover, AF64A caused a decrease in ouabain-stimulated ACh release from striatum. The present study indicates that: (a) the in vitro actions of AF64A differ from those of HC-3 and (b) the acute effects of AF64A on endogenous ACh release vary, depending on the tissues studied and the stimulation parameters used.

Original languageEnglish
Pages (from-to)1047-1053
Number of pages7
JournalNeurochemistry international
Volume7
Issue number6
DOIs
Publication statusPublished - 1985

ASJC Scopus subject areas

  • Cellular and Molecular Neuroscience
  • Cell Biology

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