The action of chlorpromazine at an isolated cholinergic synapse

Zohar Argov; Yoel Yaari

doi:10.1016/0006-8993(79)90018-0

The action of chlorpromazine at an isolated cholinergic synapse

Zohar Argov^*, Yoel Yaari

^*Corresponding author for this work

Institute for Medical Research Israel-Canada (IMRIC)

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

The effects of chlorpromazine (CPZ) on cholinergic transmission were studied at the isolated neuromuscular synapse of the frog. It was found that 5 × 10^-6 M CPZ produces the following effects: (1) a reduction in end-plate potential amplitude, mainly through inhibition of transmitter release at presynaptic nerve terminals; (2) a reduction in amplitude of focally recorded end-plate current without detectable change in nerve terminal potential: (3) a decrease in amplitude of miniature end-plate potentials; and (4) an increase in the frequency of spontaneous liberation of transmitter both in normal and calcium-free Ringer's solution. It is concluded that CPZ inhibits cholinergic transmission by a complex action on presynaptic and postsynaptic elements. The relation of these findings to central cholinergic activities of CPZ is discussed.

Original language	English
Pages (from-to)	227-236
Number of pages	10
Journal	Brain Research
Volume	164
Issue number	1-2
DOIs	https://doi.org/10.1016/0006-8993(79)90018-0
State	Published - 23 Mar 1979

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abstract = "The effects of chlorpromazine (CPZ) on cholinergic transmission were studied at the isolated neuromuscular synapse of the frog. It was found that 5 × 10-6 M CPZ produces the following effects: (1) a reduction in end-plate potential amplitude, mainly through inhibition of transmitter release at presynaptic nerve terminals; (2) a reduction in amplitude of focally recorded end-plate current without detectable change in nerve terminal potential: (3) a decrease in amplitude of miniature end-plate potentials; and (4) an increase in the frequency of spontaneous liberation of transmitter both in normal and calcium-free Ringer's solution. It is concluded that CPZ inhibits cholinergic transmission by a complex action on presynaptic and postsynaptic elements. The relation of these findings to central cholinergic activities of CPZ is discussed.",

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AB - The effects of chlorpromazine (CPZ) on cholinergic transmission were studied at the isolated neuromuscular synapse of the frog. It was found that 5 × 10-6 M CPZ produces the following effects: (1) a reduction in end-plate potential amplitude, mainly through inhibition of transmitter release at presynaptic nerve terminals; (2) a reduction in amplitude of focally recorded end-plate current without detectable change in nerve terminal potential: (3) a decrease in amplitude of miniature end-plate potentials; and (4) an increase in the frequency of spontaneous liberation of transmitter both in normal and calcium-free Ringer's solution. It is concluded that CPZ inhibits cholinergic transmission by a complex action on presynaptic and postsynaptic elements. The relation of these findings to central cholinergic activities of CPZ is discussed.

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The action of chlorpromazine at an isolated cholinergic synapse

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