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JoVE Encyclopedia of Experiments
Neuroscience
建立戊烯四唑诱导的小鼠癫痫发作模型
建立戊烯四唑诱导的小鼠癫痫发作模型
Encyclopedia of Experiments
Neuroscience
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Encyclopedia of Experiments Neuroscience
Establishing a Pentylenetetrazole-Induced Epileptic Seizure Model in Mice

建立戊烯四唑诱导的小鼠癫痫发作模型

Protocol
572 Views
02:15 min
July 8, 2025
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Please note that some of the translations on this page are AI generated. Click here for the English version.

Transcript

首先将低剂量的戊四唑或PTZ(一种癫痫诱导剂)腹腔注射到成年小鼠体内。

PTZ 被吸收到血液中并穿过血脑屏障,到达大脑。

在大脑中,γ-氨基丁酸 (GABA) 是主要的抑制性神经递质,与神经元上的 GABA-A 受体结合。

这种结合促进氯离子流入,使神经元超极化并降低其兴奋性。

PTZ 充当 GABA-A 受体拮抗剂,抑制氯离子流入并增加神经元兴奋性。

然后兴奋性神经递质与这些神经元结合并诱导长时间的去极化和动作电位的产生。

这种兴奋性的增强会影响附近的神经元,导致同步和重复放电,从而导致癫痫发作。

每

隔一天进行一次低剂量 PTZ 注射。

每次重复注射,神经元过度兴奋性逐渐增加,导致癫痫发作加剧并扩散到更大的大脑区域。

随着时间的推移

,这会导致在没有 PTZ 的情况下自发癫痫发作,从而导致癫痫。

通过将

每毫升 PTZ 2 毫克溶解在无菌 0.9% 氯化钠中开始准备注射液。称重动物,然后放入观察室中进行三分钟的习惯期。

接下来,用一毫升注射器将PTZ腹膜内注射,连接到27号针头,进入动物腹部的左象限或右象限。

最后,观察PTZ注射后的动物行为异常。

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