Antagonists of Metabotropic Glutamate Receptors Prevent the Development of Audiogenic Seizures

Pretreatment with mGluR1 antagonist AIDA (1 mg/kg) nearly completely prevented the onset of tonic-clonic seizures and increased generation of NO in the cerebral cortex of rats with genetically determined audiogenic reaction to acoustic stimulation. Administration of mGluR5 antagonist MPEP (10 mg/kg) before audiogenic exposure was followed by a significant decrease in the degree of seizure and partially prevented increased generation of NO due to acoustic stimulation. These data indicate that mGlu receptors and NO play an important role in the pathogenetic mechanisms of audiogenic seizures.