一个可光激活的等离子膜探头,基于活细胞超分辨率显微镜的自触发光氧化级联
Sonia Pfister1, Valentine Le Berruyer1, Kyong Fam1
1Chemistry of Photoresponsive Systems Laboratoire de Chémo-Biologie Synthétique et Thérapeutique (CBST) UMR 7199 CNRS, Université de Strasbourg, Illkirch, F-67400, France.
Angewandte Chemie (International ed. in English)
|April 7, 2025
概括
研究人员开发了一种用于超分辨率显微镜的自触发光氧化级联 (STPC). 这种方法使用罗达胺探针来激活和漂白单个分子,从而能够对活细胞膜进行详细的成像.
科学领域:
- 生物物理学的生物物理.
- 细胞生物学 细胞生物学
- 显微镜的使用方法
背景情况:
- 超分辨率显微镜需要精确控制光体的激活和关闭.
- 可光激活的光体对于通过在暴露于光线时在ON和OFF状态之间切换来实现这种控制至关重要.
研究的目的:
- 引入一种新型的自触发光氧化级联 (STPC),用于增强单分子局部化显微镜.
- 为了实现活细胞结构的超高分辨率成像,并改进了时空控制.
主要方法:
- 使用了血向的白色胺 (LRhod-PM) 探针,这是一个非光前体.
- 用可见光照射,以启动光氧化,产生单片氧.
- 利用生成的单点氧转化OFF状态的LRhod-PM到其光的ON状态的Rhod-PM.
主要成果:
- 证明STPC在膜双层内高局部探针度的动力学优势.
- 在膜环境中观察到光氧化级联的快速传播.
- 展示了染料的近距离增强了光漂白,促进了单分子闪的模式.
结论:
- 通过同时激活和漂白,STPC方法实现了单分子闪的模式.
- 启用了活细胞膜的超高分辨率成像,包括像filopodia和道化纳米管这样的细结构.
- 为生物系统的超分辨率显微镜的时空控制提供了一个新的策略.
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