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扩展显微镜应用在细胞和大脑组织中进行蛋白集群成像
Anastasiya Rakovskaya1, Margarita Chigriai1, Ilya Bezprozvanny1,2
1Laboratory of Molecular Neurodegeneration, Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russia.
Current protocols
|June 20, 2023
概括
扩展显微镜 (ExM) 能够对蛋白质的高分辨率成像,包括脑组织中的内等质网膜 (ER) 通道,如IP3R. 这种方法可视化STIM1和IP3R集群,有助于阿尔茨海默病的研究.
科学领域:
- 细胞生物学 细胞生物学
- 神经科学是一个神经科学.
- 显微镜的使用方法
背景情况:
- 高分辨率成像对于研究参与细胞功能的蛋白质集群至关重要.
- 总内部反射光 (TIRF) 显微镜在成像遥远的蛋白质集群方面存在局限性.
- 扩展显微镜 (ExM) 与传统光显微镜提供纳米分辨率.
研究的目的:
- 实施和验证扩展显微镜 (ExM) 用于可视化蛋白质集群.
- 为了研究内细胞网膜 (ER) 传感器STIM1和IP3R的聚类.
- 为了比较野生型和阿尔茨海默病模型小鼠中的IP3R聚类.
主要方法:
- 应用ExM用于培养细胞和脑组织中的蛋白质集群可视化.
- 使用ExM对STIM1和IP3R蛋白质集群进行成像.
- 在野生类型和5xFAD小鼠海马CA1区域的IP3R聚类的比较分析.
主要成果:
- ExM成功地可视化了在血膜附近的STIM1蛋白质集群.
- 通过ExM,可以研究海马大脑组织中的IP3R聚类,而这在TIRF显微镜下是不可能的.
- 在野生类型和5xFAD小鼠之间观察到IP3R集群的差异.
结论:
- ExM是一种强大的技术,用于高分辨率的蛋白质集群的成像,包括远离等离子膜的蛋白质集群.
- ExM提供了关于蛋白质聚类在细胞功能和阿尔茨海默氏症等疾病中的作用的宝贵见解.
- 提供了详细的协议和图像处理指南,用于ExM在蛋白质集群研究中的应用.
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