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JoVE Encyclopedia of Experiments
Neuroscience
神经细胞悬液立体定向移植到创伤性脑损伤小鼠体内
神经细胞悬液立体定向移植到创伤性脑损伤小鼠体内
Encyclopedia of Experiments
Neuroscience
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Encyclopedia of Experiments Neuroscience
Stereotaxic Transplantation of Neural Cell Suspension into a Mouse with Traumatic Brain Injury

神经细胞悬液立体定向移植到创伤性脑损伤小鼠体内

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04:12 min
August 19, 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

首先将预装注射器连接到立体定位注射泵。

注射

器含有人诱导的多能干细胞来源的神经细胞悬液。

将针头放置在患有创伤性脑损伤的小鼠手术暴露的脑皮层上方。

放下注射器,用针尖接触硬脑膜,调整坐标以瞄准受伤部位,然后稍微缩回。现在,

创建一个小切口,为针头建立一个入口点。

接下来,降低柱塞以允许细胞悬液流动。

放下针头,穿透大脑,到达深层皮层的灰质-白质边界。

最后,慢慢注入细胞悬液,同时用生理盐水冲洗手术部位以保持水合作用。

完成后,拔出针头,重新冲洗,然后闭合切口。

随着时间的推移

,移植的细胞成熟,恢复神经回路,修复脑损伤。

颅骨切除术后大约 24 小时,将鼠标放回立体定位框架中。

用开窗手术单覆盖小鼠。用无菌盐水灌洗切口部位以清洁该部位并松开缝线。用70%乙醇浸湿的棉签轻轻消毒切口部位,用细镊子和眼科剪刀去除缝线。

然后用大量的无菌盐水冲洗手术和颅骨切除部位。在细胞培养生物安全罩中,轻轻旋转或敲击细胞管以确保细胞悬液均匀。使用微量移液器通过柱塞端将大约 7.5 微升细胞加载到 Hamilton 注射器中。

以

120 度角握住注射器,柱塞端朝下,插入柱塞,注意不要在悬架和柱塞尖端之间引入气泡。将垫圈组件连接到移液器针头上,然后将针头连接到注射器上。推动柱塞将细胞悬液移入移液器针头中,并将注射器连接到立体定位注射泵。

推进柱塞以确保注射泵组件正常工作,并将针头移入注射坐标。将针尖与 bregma 对齐,并将 x 和 y 坐标设置为零。将针尖越过颅骨切除术移动到前辙的外侧两毫米和后方负一毫米,并将针尖接触硬脑膜表面。

稍微

抬起针头,然后在针头接触的位置的硬脑膜上做一个小切口。将立体定位坐标设置为 z 等于零,然后推动柱塞以确认细胞悬液充分流动,然后再将针头引入大脑。将针头引入大脑,深度等于负 1.4 毫米,将移植物放置在深层皮层的灰质/白质边界处。

启动注射泵,在 15 分钟内注入细胞悬液。使用长工作距离显微镜监测细胞悬液流出,在注射过程中用无菌生理盐水冲洗手术部位以保持组织水合作用。当所有细胞都被输送后,慢慢拔出移植针并用额外的生理盐水冲洗手术部位,然后用新缝合线闭合切口。

然后按照演示提供术后护理。

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