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JoVE Encyclopedia of Experiments
Neuroscience
小鼠原代小脑颗粒神经元神经元损伤建模
小鼠原代小脑颗粒神经元神经元损伤建模
Encyclopedia of Experiments
Neuroscience
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Encyclopedia of Experiments Neuroscience
Modeling Neuronal Injury in Mouse Primary Cerebellar Granule Neurons

小鼠原代小脑颗粒神经元神经元损伤建模

Protocol
376 Views
01:59 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

从小鼠原代小脑颗粒神经元的培养物开始。

添加高浓度的 N-甲基-D-天冬氨酸或 NMDA(一种兴奋性神经递质受体激动剂)和甘氨酸(一种协激动剂)。孵化培养物。

NMDA 和甘氨酸与 NMDA 受体上各自的位点结合,导致过度刺激并导致钙离子大量流入。

细胞内钙的增加会激活钙依赖性磷脂酶,从而降解细胞膜磷脂,导致膜损伤。

此外,细胞内钙会激活降解细胞蛋白质的蛋白酶。

钙水平升高还会诱导线粒体应激和碎片化,导致活性氧(ROS)的释放,并引起氧化应激。

此外,细胞内钙会激活 DNase,DNA 酶与 ROS 一起导致 DNA 损伤,最终导致神经元死亡。

用

不含 NMDA 和甘氨酸的新鲜培养基替换培养基,以停止信号级联。

NMDA 诱导的神经元损伤模型已准备好进行进一步分析。

为了用NMDA诱导神经元兴奋性毒性,在体外7天后,用100微摩尔NMDA和10微摩尔甘氨酸处理小脑颗粒神经元一小时。然后,用来自平行培养物的条件培养基替换培养基,无需处理。该浓度导致治疗后 24 小时 50% 的细胞死亡。

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