免疫标记-先扩展-后扩展显微镜方法使用稳定的STED染料
Dong Kong1, Delgermaa Luvsanjav1, Jadranka Loncarek2
1Cancer Innovation Laboratory, NIH/NCI/CCR, Frederick, MD, USA.
Methods in molecular biology (Clifton, N.J.)
|October 19, 2023
概括
这项研究引入了一种新的扩展显微镜方法,使用稳定的STED染料来检测中枢细胞和乳毛中强大的蛋白质. 这种技术在样本扩张后改善了抗体结合,使得关键蛋白质的纳米尺度成像成为可能.
科学领域:
- 细胞生物学 细胞生物学
- 显微镜技术 显微镜技术
- 分子成像学分子成像学
背景情况:
- 扩展显微镜 (ExM) 能够对细胞结构的纳米尺度成像,如中心体,中心体和乳毛.
- 当前的ExM协议在样本扩张和变质后,经常面临抗体与蛋白质结合的挑战.
- 精确地定位中心体和状蛋白质对于理解细胞功能至关重要.
研究的目的:
- 开发和验证使用稳定的STED染料进行扩张显微镜协议,以改善蛋白质检测.
- 为了克服对ExM中变性后蛋白质结合的初级抗体的局限性.
- 通过使用"免疫标记-首先-扩展-后来"方法,使中心和状蛋白质的强大的纳米级成像成为可能.
主要方法:
- 使用了两个稳定的STED染料,与扩展显微镜协议兼容.
- 实施了"免疫标记-首先扩展-后来"的策略,在样本扩展之前进行免疫标记.
- 通过ExM协议的交联,聚合和变性步骤验证了染料稳定性.
主要成果:
- 在整个膨胀显微镜工作流程中证明了STED染料的稳定性.
- 在扩张后使用传统和STED显微镜实现了免疫标记蛋白质的强大检测.
- 成功分析了中心点附属体蛋白 Cep164 和状蛋白 ARL13B 的局部.
结论:
- 使用稳定的STED染料开发的ExM协议为纳米级蛋白质定位提供了一种可靠的方法.
- 这种方法有效地解决了在ExM中蛋白质变性化后抗体可访问性的挑战.
- 该方法为推进研究中心体,中心体和乳毛细胞提供了有价值的工具.
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