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JoVE Encyclopedia of Experiments
Neuroscience
从胚胎雏鸡脑中获取小脑切片
从胚胎雏鸡脑中获取小脑切片
Encyclopedia of Experiments
Neuroscience
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Encyclopedia of Experiments Neuroscience
Obtaining Cerebellum Slices from an Embryonic Chick Brain

从胚胎雏鸡脑中获取小脑切片

Protocol
277 Views
04:34 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

在合适的发育阶段取受精的母鸡蛋。

切开外壳以接触胚胎。

找到并解剖头部,然后将其转移到含有冷冻磷酸盐缓冲液的培养皿中。

去除眼睛和下巴。

将

皮肤与颅骨表面分开。

接下来,切割并去除颅骨。

清除周围的结缔组织以暴露大脑。

分离前脑。

然后,将小脑与后脑和血管分离。

将

小脑转移到冷冻的盐缓冲液中。

胚胎小脑含有一层快速分裂的神经元祖细胞,这使得它对神经发生研究很有价值。

将小脑放在组织切碎机的平台上。

去除多余的缓冲液并切片小脑。

在

切片上放冷冻的盐缓冲液。

将

小脑切片转移到含有冷冻盐缓冲液的培养皿中。

在显微镜下,分离各个切片以进行进一步分析。

首先,将受精的棕色鸡蛋放入 38 摄氏度的鸡蛋孵化器中,直到它们达到胚胎第 14 天。在胚胎第 14 天,在鸡蛋上切一个口以暴露胚胎,并在卵中将雏鸡胚胎斩首。将头部放入含有冰冷PBS的培养皿中。

在解剖显微镜下,使用标准镊子在每只眼睛后面切开一个切口,一直穿过组织,然后切除眼睛和上颌。然后,在咽部做第二个切口以去除下颌。接下来,使用标准镊子剥离头骨表面的皮肤,将其去除。然后,去除额骨和顶骨,露出大脑。

从腹侧,去除咽软骨和辅助间充质。然后,将大脑背侧朝上放置,小心地去除后脑背侧的间充质,注意不要损坏软脑膜。接下来,在中脑和后脑之间的组织中做一个切口,以分离后脑,包括小脑。在小脑的外侧交界处和后脑的鼻翼板处一直切开组织。切除整个小脑,注意在整个解剖过程中保持软脑膜的完整性。

最后,去除正在形成的脉络丛,并将解剖的小脑移入冰冷的HBSS中。使用抹刀或 3 毫升巴斯德移液器将整个小脑转移到组织切碎机的无菌平台上,切掉尖端以扩大孔径。使用移液器去除多余的液体。

将组织切碎机的切割速度设置为其最大值的 50%。然后,以所需的方向切割小脑,厚度为300微米。使用3毫升巴斯德移液器,将切片的小脑覆盖在冷HBSS中。

然后,使用带有切割尖端的 3 毫升巴斯德移液器,将 HBSS 和切片转移到含有 20 毫升冰冷 HBSS 的 60 毫米培养皿中。将培养皿放在解剖显微镜下,用光纤光源照射。然后,使用制表钳分离脑组织的各个切片。

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