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相关概念视频

Protein Dynamics in Living Cells01:19

Protein Dynamics in Living Cells

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Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...
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机械敏感的结合性橄电解质用于可视化活细胞的时间变化.

Ji-Yu Zhu1,2, Samuel J W Chan1,3, Hongyue Cui4

  • 1Department of Chemistry, National University of Singapore, Singapore, 117543, Singapore.

Angewandte Chemie (International ed. in English)
|May 6, 2025
PubMed
概括

研究人员开发了新的光探针,称为合性电解质 (COE),根据它们的环境改变颜色. 这些探测器可以随着时间的推移跟踪活细胞膜的变化,为细胞力学提供了洞察力.

关键词:
结合的橄电解质 结合的橄电解质光探测器 光探测器这是一种原性化物.脂质双器 脂质双器机械敏感性 机械敏感性

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科学领域:

  • 生物物理学的生物物理.
  • 细胞生物学 细胞生物学
  • 材料科学 材料科学 材料科学

背景情况:

  • 膜间联氧化电解质 (COE) 是用于生物成像的光染料.
  • 当前的COEs可视化染料位置,但不是动态细胞变化.
  • 需要探测器来报告活细胞膜的物理性质.

研究的目的:

  • 开发用于活细胞成像的新型,对环境敏感的COE.
  • 创建能够报告细胞内膜特性时间变化的探针.
  • 利用这些探测器可视化细胞区内的动态生物物理变化.

主要方法:

  • 设计和合成COE-BY系列,其中包括BODIPY核心和cationic悬挂组.
  • 光物理性质的表征,包括两光子吸收和NIR-II激发.
  • 在模型囊泡和活细胞中测试探头对脂质组成和膜张力的敏感性.
  • 应用双光子光终身成像显微镜 (2p-FLIM) 进行动态成像.

主要成果:

  • COE-BY系列具有高的两光子吸收,NIR-II激发和亮度.
  • 探测器的发射寿命对脂质组成和膜张力敏感.
  • COE-BYPhOC4成功地对细胞内膜机制的变化进行了成像.
  • 在长期监测中,COEs在内分泌体内显示出稳定的囊泡结合.

结论:

  • 对环境敏感的COE为可视化活细胞膜物理性质的时间变化提供了一个新的工具.
  • 这些探头可以长期监测细胞内囊泡中的生物物理变化.
  • 开发的COEs推进了用于研究细胞动力学和机制的生物成像能力.