Cyclothiazide induces seizure behavior in freely moving rats.

Cyclothiazide induces seizure behavior in freely moving rats.
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环噻嗪诱导自由活动大鼠的癫痫行为

DOI:
10.1016/j.brainres.2010.07.088
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发表时间:
2010-10-08
期刊:
影响因子:
2.9
通讯作者:
Wang Y
Wang Y
中科院分区:
医学3区
文献类型:
--
作者:
Kong S;Qian B;Liu J;Fan M;Chen G;Wang Y

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我们以前已经证明,环噻嗪(CTZ)是一种有效的惊厥药物诱导强大的癫痫样活动在海马神经元在体外和体内。本研究进一步建立了CTZ诱导的自由活动大鼠行为性癫痫发作的动物模型。左心室微量注射CTZ剂量依赖性地在给药后3小时内诱导强烈的癫痫发作行为。在0.75 μ mol剂量下,CTZ在71%(n = 14)的受试大鼠中诱导了Racine评分IV-V癫痫发作行为。此外,CTZ还可诱发伴随行为性癫痫发作的癫痫样EEG活动。CTZ对行为和EEG的惊厥作用可通过临床抗惊厥药物地西泮(n = 5)预处理来阻断。总之,我们的研究结果表明,CTZ是能够诱导完整的动物行为癫痫发作。由于CTZ同时作用于GABA能和谷氨酸能系统,这种新的动物癫痫模型将有助于抗惊厥药物的测试和一般癫痫研究。
We have previously demonstrated that cyclothiazide (CTZ) is a potent convulsant drug inducing robust epileptiform activity in hippocampal neurons both in vitro and in vivo. Here we further establish an animal model for CTZ-induced behavioral seizures in freely moving rats. Microinjection of CTZ into left ventricle dose-dependently induced robust seizure behaviors within three hours after administration. At doses of 0.75 μmol, CTZ induced Racine score IV-V seizure behaviors in 71% (n=14) of the rats tested. In addition, CTZ also induced epileptiform EEG activity accompanying behavioral seizures. The convulsant action of CTZ on both behavior and EEG was blocked by pre-treatment with clinical anticonvulsant drug diazepam (n=5). In conclusion, our results demonstrate that CTZ is capable of inducing behavioural seizures in intact animals. Since CTZ acts on both GABAergic and glutamatergic systems, this new animal epilepsy model will be useful for anticonvulsant drug testing and general epilepsy research.
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