洛伊丁-PAINT:F-actin的增强定量纳米尺度成像
Hirushi Gunasekara1, Thilini Perera1, Chih-Jia Chao2
1Department of Chemistry, College of Liberal Arts and Sciences, University of Illinois Chicago, Chicago, Illinois.
Biophysical journal
|July 4, 2024
概括
洛伊丁-PAINT 能够超分辨率成像丝状动蛋白 (F-actin) 以精确的纳米尺度量化在细胞中. 这种方法增强了细胞结构的保存和蛋白质特异性成像可能性.
科学领域:
- 细胞生物学 细胞生物学
- 生物物理学的生物物理.
- 显微镜的使用方法
背景情况:
- 丝状活性蛋白 (F-actin) 的动态对于细胞功能至关重要.
- 超分辨率显微镜对于可视化纳米级细胞结构至关重要.
- 现有的方法,如直接随机光学重建显微镜 (dSTORM),在量化和结构保存方面存在局限性.
研究的目的:
- 介绍法洛伊丁-PAINT,一种用于定量F-actin成像的新型超分辨率技术.
- 为了证明法洛伊丁-PAINT在保护微妙的细胞结构方面的能力.
- 为了使用商业可用的试剂实现定量蛋白特异性 PAINT.
主要方法:
- 开发使用内在法洛伊丁解离的法洛伊丁-PAINT.
- 在低染料度缓冲器中应用PAINT超分辨率显微镜.
- 化学促进法洛伊丁解离,以增强单分子标签.
- 在U2OS细胞和树突细胞 (DCs) 中对F-actin的成像.
主要成果:
- Phalloidin-PAINT 在整个细胞和微妙的膜突起中提供了一致的纳米级F-actin量化.
- 与dSTORM相比,提高了脆弱细胞结构的保护.
- 在暴露于脂多糖糖化物后,在小鼠DC中证明了F-actin再分配和改变的膜突起.
结论:
- 洛伊丁-PAINT提供了一种可靠的方法,用于定量超分辨率成像F-actin.
- 该技术在成像过程中改善了细胞超结构的保存.
- 这种方法为使用可访问的试剂进行定量蛋白特异性 PAINT 打开了道路.
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