Effects of anticonvulsants in vivo on high affinity choline uptake in vitro in mouse hippocampal synaptosomes - PubMed (original) (raw)

• PMID: 3978310
• PMCID: PMC1987204

Comparative Study

Effects of anticonvulsants in vivo on high affinity choline uptake in vitro in mouse hippocampal synaptosomes

J A Miller et al. Br J Pharmacol. 1985 Jan.

Abstract

The effects of several anticonvulsant drugs on sodium-dependent high affinity choline uptake (HACU) in mouse hippocampal synaptosomes was investigated. HACU was measured in vitro after in vivo administration of the drug to mice. HACU was inhibited by drugs which have in common the ability to facilitate gamma-aminobutyric acid (GABA) transmission, pentobarbitone, phenobarbitone, barbitone, diazepam, chloridiazepoxide, and valproic acid. Dose-response relationships were determined for these drugs and the drugs' potencies at inhibiting HACU correlated well with their anticonvulsant potencies. Clonazepam, ethosuximide, carbamazepine, and barbituric acid had no effect on HACU in the doses used while phenytoin and trimethadione stimulated HACU. These results suggest that certain anticonvulsants may elicit a part of their anticonvulsant activity by modulating cholinergic neurones. This effect may be mediated through a GABA mechanism.

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