Effects of N-methyl-N-cis-styryl-cinnamamide on Penicillin-induced Epileptiform Discharges in Rats / 中山大学学报(医学科学版)

[Objective]To investigate the effects of the seed extract of Clausena lansium,N-methyl-N-cis-styryl-cinnamamide,on the penicillin-induced epilepsy in rats.[Methods]Thirty-two Sprague-Dawely rata were randomly divided into four groups with 8 rats in each group:normal control(20 mL/L Tween 80+Normal Saline),model control(20 mL/L Tween 80+Penicillin),low dose treatment(Cinnamamide 75 mg/kg+Penicillin),hish dose treatment(Cinnamamide 150 mg/kg+Penicillin).The epilepsy rat model was established by localized intracortical injections of penicillin.The effects of pretreatments of the rats with N-methyl-N-cis-styryl-cinnamamide(intraperitoneal injection,ip)on the penicillin-induced seizure activities and the epileptiform discharges recorded by electrocorticogram(ECoG)were observed.[Results]The penicillin-induced seizure was significantly lightened in both the pretreatment groups(75 and 150 mg/kg N-methyl-N-cis-styryl-cinnamamide),compared with the model group.N-methyl-N-cis-styryl-cinnamamide(75 and 150 mg/kg)could significantly prolonged the latency of epileptiform activities,shorten the duration of epileptiform discharges and decreased the mean spike frequency in the late stage(P＜0.05 or P＜0.01).However,there was no significant difference in the highest value or the lowest value of the epileptiform waves between the model and cinnamamide treatment groups.[Conclusion]The seed extract of Clansena lansium,N-methyl-N-cis-styryl-cinnamamide,can significantly inhibit the seizure and epileptiform discharges caused by penicillin-localized injections in the cortex of rats,suggesting that the natural substance has an anticonvulsive function.

The effects of topiramate on the epileptiform discharge and related neurotrans mitters in hippocampus in seizure rats induced by penicillin / 中国药理学通报

Aim To investigate the effects of topiramate (TPM) o n the model of seizure rats induced by penicillin and explore its mechanism of ant iconvulsant action.Methods Using the model of seizure rats indu ced by penicillin localized injected in cortex, we investigated the effect of TP M on the changes of seizure extent and recorded the latency of epileptiform disc harge, frequency of epileptiform wave, highest wave of hippocampus EEG. The leve ls of Glu, Asp, Gly and GABA in hippocampus were determined by high performance liquid chromatography (HPLC). Results Compared with the model g roup, TPM (110 mg?kg -1, 440 mg?kg -1, ig) could significantly light ened the extent of seizure, prolonged the latency of epileptiform discharge, red uced the frequency of epileptiform wave and minished the highest wave of hippoca mpus EEG (P