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JoVE Encyclopedia of Experiments
Neuroscience
可视化培养的星形胶质细胞中货物的细胞内转运
可视化培养的星形胶质细胞中货物的细胞内转运
Encyclopedia of Experiments
Neuroscience
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Encyclopedia of Experiments Neuroscience
Visualizing Intracellular Transport of Cargo in Cultured Astrocytes

可视化培养的星形胶质细胞中货物的细胞内转运

Protocol
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02:35 min
August 13, 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

首先在培养皿内的盖玻片上对小鼠原代星形胶质细胞进行贴壁培养。

与穿过完整细胞膜进入星形胶质细胞的荧光嗜酸探针一起孵育。

探针选择性地积聚在酸性内溶酶体囊泡内,并荧光标记囊泡以监测其运输。

洗涤以去除多余的探针并加入新鲜培养基。

将培养物置于共聚焦显微镜下,聚焦于单个细胞以进行延时成像。

将

标记的货物可视化为分布在核周区域、

细胞质和星形胶质细胞过程中

的荧光点。沿

Z 轴捕获多个焦平面,以可视化整个三维细胞体积中的货物。

以规定的时间间隔进行成像,以跟踪星形胶质细胞内不同深度的细胞内货物运输。

分析货物运动,以区分静止货物、向细胞外围移动的货物和向细胞核移动的货物。

成像前30分钟,在200微升星形胶质细胞培养基中将合适的溶酶体标记探针稀释至1微摩尔的工作浓度,并在37摄氏度下用探针标记星形胶质细胞30分钟。然后用温热的星形胶质细胞培养基洗涤细胞一次,并用成像培养基代替洗涤液。

探针标记后,立即将星形胶质细胞培养容器放入显微镜载物台上的相应适配器中。并使用落射荧光,定位表达荧光蛋白或探针的细胞。使用数码相机调整荧光样品照明以可视化所选细胞,并调整焦点并放大到单个细胞中。

然后使用缩放和确定对焦功能以每两秒一帧的频率获取单个 C 堆栈延时系列,时间间隔在 300 到 500 秒之间。将延时图像保存并导出为 Avi 或 TIFF 堆栈文件。

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