alexa 7-Chlorokynurenic acid antagonizes the anticonvulsant activity of D-cycloserine in maximal electroshock seizures.
Neurology

Neurology

International Journal of Neurorehabilitation

Author(s): Peterson SL

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Abstract This study evaluated the anticonvulsant activity of D-cycloserine against maximal electroshock seizures in rats. Systematically administered D-cycloserine (i.p.) inhibited maximal electroshock-induced tonic hindlimb extension in a dose-dependent manner with an ED50 of 153 mg/kg. No neurological deficit was detected at any dose of D-cycloserine. In contrast, L-cycloserine had no effect on the maximal electroshock seizures. Administration of the strychnine-insensitive glycine receptor antagonist 7-chlorokynurenic acid (100 nmol, i.c.v.) significantly antagonized the anticonvulsant activity induced by D-cycloserine. Centrally administered D-cycloserine (i.c.v.) induced significant anticonvulsant activity 1-2 h after administration with an approximate ED50 of 5 mumol. 7-Chlorokynurenic acid (100 nmol, i.c.v.) significantly antagonized the anticonvulsant activity of centrally administered D-cycloserine. L-Cycloserine (i.c.v., 2 h) induced no significant anticonvulsant activity. These results provide evidence that the anticonvulsant activity of D-cycloserine in maximal electroshock seizures may be mediated by strychnine-insensitive glycine receptors.
This article was published in Epilepsy Res and referenced in International Journal of Neurorehabilitation

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