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JoVE Encyclopedia of Experiments
Immunology
对流增强抗体向小鼠大脑的递送
对流增强抗体向小鼠大脑的递送
Encyclopedia of Experiments
Immunology
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Encyclopedia of Experiments Immunology
Convection-Enhanced Delivery of Antibodies into a Mouse Brain

对流增强抗体向小鼠大脑的递送

Protocol
576 Views
02:58 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

将具有

颅中线切口的麻醉小鼠固定到立体定向框架上。

检测颅骨

上的参考点前萵,并确定注射位置。

在该位置打一个钻孔,避免损伤覆盖大脑的硬脑膜。

取一个装有抗体的阶梯导管,安装在立体定向机器人上,并连接到输液泵。

该导管包括一个从金属针头突出的熔融石英毛细管,在融合点处形成阶梯式外径。

将

导管插入脑实质。启动输液泵,在导管开口处产生压力梯度,并以受控速率输送抗体,这种技术称为对流增强输送。

阶梯式直径压缩组织,形成密封。

密封可防止液体反流,并能够分布大量抗体,同时降低组织损伤的风险。

对于小鼠纹状体的抗体注射,确认麻醉小鼠对皮肤捏捏缺乏反应,并用毛发修剪器剃光头部。用浸泡在碘溶液中的棉签对皮肤进行消毒。

用手术刀沿着颅中线做一个 10 毫米的皮肤切口,在眼睛水平处完成。使用鼻夹和耳杆将鼠标固定在立体定向架中,注意颅骨表面水平并紧固固定。

将

注射器放入立体定向机器人中,并将钻头与导管尖端同步在参考点上。使用镊子缩回皮肤,并在颅骨表面定位前蕨。使用钻头的尖端在软件中参考 bregma,并将钻头移动到距 bregma 位置的 1 毫米正面和 2 毫米

侧面。

钻一个钻孔,注意不要损坏硬脑膜,然后将注射器移到钻孔上。从注射器中分配 0.5 至 1 微升,以确保导管中没有气泡。如图所示开始对流增强输送,观察颅骨表面是否有任何液体从注射点回流的痕迹。

在

输送和导管拔除结束时,以每分钟 0.2 微升的速度启动注射泵,以检查注射过程中是否有导管堵塞的证据。如果没有发生堵塞,应立即观察到来自导管尖端的注射混合物液滴。

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