A Study of the Effect of Derivative of Oximes Pyridine (GIZh-298) on the Contents of Monoamines and Their Metabolites in the Rat Brain during Seizures Induced by Maximal Electroshock

Abstract—We studied the effects of the potential antiepileptic agent GIZh-298 and a comparison drug, topiramate, on the concentration of monoamines and their metabolites in the frontal cortex, hypothalamus, nucleus accumbens, striatum, and hippocampus in the rat brain after generalized tonic–clonic seizure caused by electroshock (MES). We found that GIZh-298 (60 mg/kg, i.p.) exhibits a pronounced anticonvulsant effect in the test of MES antagonism and prevents the increase in functional activity of the dopaminergic system and the reduction of the norepinephrine (NE) content in the same structure. Topiramate (100 mg/kg, i.p.), as well as the GIZh-298, prevented the emergence of MES-induced seizures and stimulated an increase in the NA level in the striatum to the normal values but did not affect the MES-induced changes in the functional activity of the dopaminergic system of the nigrostriatal system. Therefore, it may be concluded that the modulation of the noradrenergic neurotransmission in the striatum is one of the mechanisms of the anticonvulsant effect of both GIZh-298 and topiramate in the test of MES antagonism and, in addition, GIZh-298, unlike topiramate, contributes to the reduction of the functional activity of the dopaminergic system in this structure in response to MES.