高动态范围探测单分子机械力转换在细胞-矩阵粘附键的细胞张力纳米传感器的高动态范围探测
Shaojun Wu1, Wenjing Tang1, Ziyi Wang1
1State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China.
JACS Au
|April 1, 2024
概括
一个新的等离子张力纳米传感器 (PTNS) 允许连续,毫秒级测量细胞粘附的力量. 这个工具可视化了在细胞迁移过程中actin驱动的引力如何影响分子离合动力学.
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:
- 机械信号在动物组织中至关重要,但理解单细胞粘附键的力转导是具有挑战性的.
- 现有的基于DNA的分子张力传感器 (MTS) 在检测范围和时间分辨率方面存在局限性.
研究的目的:
- 开发一种新型传感器,用于在单个分子水平上进行高分辨率的机械力测量.
- 为了克服现有的分子张力传感器的局限性.
主要方法:
- 引入了用于力测量的等离子体张力纳米传感器 (PTNS).
- 连续和可逆力测量能力范围从1.1到48 pN.
- 用于动态力追踪的毫秒时间分辨率.
主要成果:
- 在形成和迁移过程中,PTNS能够可视化细胞矩阵粘附处的高动态范围单分子力过渡.
- 时间解析的力痕迹表明,actin驱动的引力调节分子离合力过渡的寿命和持续时间.
- 证明了连续和可逆的力测量,与基于值的MTS不同.
结论:
- 塑张力纳米传感器 (PTNS) 提供了灵敏,快速和强大的力探测能力.
- 通过提供前所未有的时间和力分辨率,PTNS推进了单分子和单细胞生物物理学的研究.
- 这种技术对于理解活细胞中的动态机械过程非常有价值.
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