用绿光对 BODIPY 光的光激活
Andrea Tomassini1, Yunshu Liu2, Yeting Zheng1
1Laboratory for Molecular Photonics, Department of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146-0431, United States.
The Journal of organic chemistry
|June 6, 2025
概括
新的可光激活染料使用可见光进行激活,最大限度地减少细胞损伤. 这使得在活细胞中实现超高分辨率成像,具有前所未有的低光毒性照明.
科学领域:
- 化学生物学 化学生物学
- 显微镜的使用方法
- 生物光子学 生物光子学
背景情况:
- 现有的可光激活光染料需要紫外线或紫外线,在生物样本中引起显著的光毒性.
- 对于可以通过更长的波长 (>500 nm) 激活的染料,对于活细胞成像具有低功率密度,有着极大的需求.
研究的目的:
- 开发一种新的可光激活合成染料策略,用于活细胞超分辨率成像.
- 为了使光光激活使用可见光,特别是绿色光谱,以减少光毒性.
主要方法:
- 设计和合成一种新型基于二甲 (BODIPY) 的染料,与一种氧化异环相结合.
- 使用561nm激光和随后用581nm激发成像的光激活实验.
- 在活细胞中定位单个光分子并重建细胞结构 (溶解体) 的亚衍射图像.
主要成果:
- 证明绿光照明 (561nm) 裂开了氧化环,产生了一种发出红色的光产品.
- 在活细胞中实现了细胞结构的精确单分子定位和超高分辨率成像.
- 在使用的可见光照射条件下,证实轻微的光毒性.
结论:
- 开发的BODIPY-oxazine系统为创建可光激活染料提供了可行的光化学策略.
- 这种方法使得在显著降低光毒性条件下,能够在活细胞中进行超分辨率显微镜.
- 这些发现为先进的活细胞成像技术铺平了道路,提高了生物相容性.
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