Antiepileptogenic action of 7-chlorokynurenic acid on amygdala kindling of rats

Tazuko Namba, Kiyoshi Morimoto, Norihito Yamada, Saburo Otsuki

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


To investigate the role of strychnine-insensitive glycine receptors in epilepsy, we studied the effects of 7-chlorokynurenic acid (7-CK), a selective strychnine-insensitive glycine receptor antagonist, on amygdala kindling development and previously amygdala-kindled seizures in rats. ICV administration of 7-CK (10 or 20 μg) suppressed amygdala kindling development, assessed according to the motor seizure stage and afterdischarge development, in a dose-dependent manner. However, 7-CK had no significant effect on previously kindled seizures at either of these doses nor did 20 μg at any time (15 min, 30 min, 2 h, and 24 h) after injection studied. These results demonstrate that this selective strychnine-insensitive glycine receptor antagonist has antiepileptogenic activity and suggest a role for the glycine receptors in the contribution of the NMDA receptor complex to epileptogenic events.

Original languageEnglish
Pages (from-to)275-281
Number of pages7
JournalPharmacology, Biochemistry and Behavior
Issue number2
Publication statusPublished - Oct 1993


  • 7-Chlorokynuneric acid
  • Amygdala
  • Antiepileptogenic effect
  • Kindling
  • Strychnine-insensitive glycine receptors

ASJC Scopus subject areas

  • Biochemistry
  • Toxicology
  • Pharmacology
  • Clinical Biochemistry
  • Biological Psychiatry
  • Behavioral Neuroscience


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