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JoVE Encyclopedia of Experiments
Neuroscience
通过固定应力在小鼠中诱导抑郁样行为
通过固定应力在小鼠中诱导抑郁样行为
Encyclopedia of Experiments
Neuroscience
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Encyclopedia of Experiments Neuroscience
Inducing Depression-like Behavior in a Mouse via Immobilization Stress

通过固定应力在小鼠中诱导抑郁样行为

Protocol
648 Views
02:12 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

隔离且适应环境的小鼠放在中等光线下的测试室中,以避免突然的压力。

在无压力状态下,大脑神经元会释放谷氨酸,这是一种兴奋性神经递质,可与邻近神经元上的受体结合,促进信号传输。

轻轻握住鼠标的尾巴,防止肌肉紧张或收紧,然后将其放在粗糙的表面上。

接下来,将鼠标放置在有盖的约束器附近,鼓励其自愿进入约束器内的暗洞。

将

小鼠固定在约束器中而不会受伤,从而诱导固定应力。

在多个疗程中重复此固定过程以诱发慢性压力,触发皮质酮(一种压力荷尔蒙)的释放。

皮质酮在神经元内扩散并与其糖皮质激素受体结合,触发细胞内信号传导,从而减少谷氨酸受体的数量。

这会减少谷氨酸反应和信号传输,导致小鼠出现类似抑郁的行为,对活动的兴趣降低。

首先使用数字照度计将房间设置为 200 勒克斯。在测试前至少一周将小鼠安置在单独的笼子中,并在实验前将小鼠放在测试室中至少 30 分钟。轻轻握住鼠标尾巴,避免鼠标拉紧,然后小心地将其放在粗糙的表面上。

用

一条小白毛巾盖住约束器,然后轻轻地将鼠标放在约束器的开口处,使鼠标自愿进入约束器。接下来,将封口放好,尽可能紧紧地束缚鼠标,小心避免损坏身体,例如尾巴、脚和睾丸。

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