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JoVE Encyclopedia of Experiments
Neuroscience
在实验性自身免疫性神经炎小鼠模型中评估运动功能
在实验性自身免疫性神经炎小鼠模型中评估运动功能
Encyclopedia of Experiments
Neuroscience
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Encyclopedia of Experiments Neuroscience
Assessing Motor Function in an Experimental Autoimmune Neuritis Mouse Model

在实验性自身免疫性神经炎小鼠模型中评估运动功能

Protocol
396 Views
04:18 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

鼠标放在跑步机上记录其跑步运动,评估其运动功能,代表控制身体运动的能力。

试验后,将百日咳毒素注射到麻醉小鼠的腹腔内,以削弱其血神经屏障。

接下来,去除小鼠肩胛骨之间的毛发,对该区域进行消毒,并将带有佐剂的髓磷脂模拟肽注射到皮下组织中。

重复两次注射以获得最佳反应。

这些肽刺激抗原呈递细胞,这些细胞迁移到淋巴结并产生自身反应性 T 细胞。

这些 T 细胞进入血液,穿过受损的血神经屏障,靶向周围神经,导致细胞因子的释放。

这会吸引巨噬细胞和 B 细胞,它们释放效应分子,降解髓鞘。

髓磷脂的分解会损害神经信号传递和实验性自身免疫性神经炎或 EAN 的发作。

最后,重复跑步机测试。小鼠表现出奔跑和协调肢体运动困难,表明运动功能障碍。

疾病诱导前三天,打开运动功能评估仪,打开灯光按钮。拿起鼠标并将其放在装有红色食用色素的容器上。将鼠标放入步行室,并将跑步机速度设置为每秒 15 厘米。打开跑步机,点击"记录",使用步态功能成像系统捕捉鼠标的跑步动作36秒。

36秒后,停止录制和跑步机,并将练习跑的练习跑视频文件保存在指定文件夹中。

在第一次免疫前一天,使用配备301/2号针头的0.5毫升注射器在250微升小鼠等渗PBS IP中施用每毫升1.6微克百日咳毒素,麻醉6至8周龄雄性C57黑色6小鼠。

第二天,将等体积的新鲜制备的肽溶液在0.9%盐水中和每毫升20毫克结核分枝杆菌混合在完整的弗氏佐剂中,在珠子打浆器中,并在室温下以最大速度混合溶液1分钟。

将

装有 23 号针头的注射器装入接种物,并在排空注射器轴内的任何空气之前倒置并摇动注射器。

在

输送接种物之前,去除肩胛骨之间中线外侧的毛发,并用 70% 乙醇对暴露的皮肤进行消毒。

然后,使用一对艾迪生镊子抓住皮肤,并通过皮下注射将 50 微升溶液输送给百日咳毒素注射小鼠。

第二天早上,如刚才所示,在 250 微升 PBS IP 中输送每毫升 1.2 微克百日咳毒素,然后在 48 小时后再注射每毫升 1.2 微克百日咳毒素 IP。

三天后,在第三次百日咳注射后,在与之前相同的注射部位再施用50微升新鲜制备的接种物,并每周监测动物的临床评分和运动功能两次,直至实验结束。

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