Establishing a mouse model of epilepsy via injectin of kainic acid into the pirform contex
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R742.1

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    Abstract:

    Objective:The current study aims to establish and evaluatee the kindling model of epilepsy induced by kainic acid(KA) microinjection into piriform cortex. Methods:Using c -fos immunofluorescence staining and TdT -mediated dUTP nick-end labeling (TUNEL)staining techniques to find the piriform cortex associated with epilepsy in a acute epilepsy mouse model. Racine score and seizure latency were observed after injection of KA in piriform cortex. Behavioral experiments were performed including testing the learning and memory abilities of mice in a water maze and the exploration ability of mice in a new object. The results of seizures and behavioral experiments were compared with the epileptic model of stereotactic injection of KA into the hippocampus. The electrical activities of new model mouse neurons were measured by electrophysiological techniques. Results:The results of c-fos immunofluorescence and TUNEL staining showed that in addition to the hippocampus,neurons in the piriform cortex and hippocampus were also significantly activated,and apoptosis occurred in the acute epilepsy mouse model. After injecting KA into the piriform cortex, the epilepsy was successfully ignited. Compared with the epilepsy model injected KA into the hippocampus,there was no significant difference in the epileptic seizure score and the seizurelatency was shorter. The behavioral results showed that the epileptic model mice induced by KA injection into the piriform cortex had a reduced spatial memory ability and a reduced ability to explore new objects. These results showed no significant difference compared to the epileptic model induced by KA injection into the hippocampus. The patch clamp recording test showed an increase in firing frequency and the resting membrane potential,and a decrease in amplitude of neuronal discharge. Conclusion:The microinjection of KA into the piriform cortex has successfully induced epilepsy,which may provide a new animal model for studying the pathogenesis of epilepsy.

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张玲芝,秦滢,吴连连,刘婷隽,陈全刚,胡安康.梨状皮层注射红藻氨酸建立癫痫小鼠模型[J].南京医科大学学报(自然科学版英文版),2023,(8):1094-1101.

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  • Received:March 29,2023
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  • Online: August 10,2023
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