1687679

Vinpocetine preferentially antagonizes quisqualate/AMPA receptor responses: evidence from release and ligand binding studies.

Article date: 1991/12/10

PubMed ID: 1687679

Journal name: European journal of pharmacology (ISSN: 0014-2999)

ABSTRACT

The effect of vinpocetine on excitatory amino acid receptors was examined in the rat brain by two different biochemical approaches. In release experiments with striatal slices, vinpocetine reduced the efflux of dopamine and acetylcholine evoked by glutamate, quisqualate and N-methyl-D-aspartate (NMDA), but not that evoked by kainate. In binding experiments with cortical membranes, vinpocetine reduced the binding of [3H]2-amino-3-3-hydroxy-s-methylisoxasole-4-yl-propionic acid ([3H]AMPA), a quisqualate partial agonist, in an incomplete manner, but failed to influence the binding of [3H]kainate and [3H]3-(2-carboxypyperazine-4-yl)-propyl-1-phosphonic acid ([3H]CPP), an NMDA agonist. These findings suggest that vinpocetine is a quisqualate/AMPA antagonist of some specificity and selectivity.

Author List: Kiss B, Cai N S, Erdö S L

Publication Types: Journal Article

Substances mentioned in the article: Glutamates; Receptors, AMPA; Receptors, Amino Acid; Receptors, Cell Surface; Receptors, Kainic Acid; Receptors, N-Methyl-D-Aspartate; Receptors, Neurotransmitter; Vinca Alkaloids; Tritium; Ibotenic Acid; Glutamic Acid; vinpocetine; N-Methylaspartate; alpha-Amino-3-hydroxy-5-methyl-4-isoxazolepropionic Acid; Quisqualic Acid; Acetylcholine; Kainic Acid; Dopamine;

Mesh terms: Acetylcholine/secretion; Animals; Binding, Competitive; Cerebral Cortex/metabolism; Corpus Striatum/anatomy & histology; Dopamine/secretion; Glutamates/pharmacology; Glutamic Acid; Ibotenic Acid/analogs & derivatives; In Vitro Techniques; Kainic Acid/metabolism; Male; Membranes/metabolism; N-Methylaspartate/pharmacology; Quisqualic Acid/pharmacology; Rats; Rats, Inbred Strains; Receptors, AMPA; Receptors, Amino Acid; Receptors, Cell Surface/antagonists & inhibitors; Receptors, Kainic Acid; Receptors, N-Methyl-D-Aspartate/metabolism; Receptors, Neurotransmitter/antagonists & inhibitors; Tritium; Vinca Alkaloids/metabolism; alpha-Amino-3-hydroxy-5-methyl-4-isoxazolepropionic Acid;

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