基于环境敏感染料光寿命的活细胞生物传感器
Brian P Mehl1, Pothiappan Vairaprakash1, Li Li1
1Department of Pharmacology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
Cell reports methods
|March 19, 2024
概括
对环境敏感的光染料和FLIM生物传感器被优化为活细胞成像. 这种方法准确量化了细胞中激活的Cdc42蛋白质水平,避免了常见的成像器件.
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:
- 光终身成像显微镜 (FLIM) 为生物传感提供了独特的功能.
- 对环境敏感的染料对于开发先进的FLIM生物传感器至关重要.
- 监测活细胞中的蛋白质构造变化需要精确的成像技术.
研究的目的:
- 为FLIM生物传感器选和优化对环境敏感的美洛胺染料.
- 开发一种基于FLIM的可靠方法,用于量化活细胞内源性Cdc42活性.
- 通过使用相位分析来消除与传统比率成像相关的文物.
主要方法:
- 选梅洛胺染料以获得最佳的光物理特性 (生命周期变化,光稳定性,亮度).
- 使用FLIM监控生物传感器报告Cdc42形状动态.
- 应用相位分析用于定量单光体分析.
主要成果:
- 确定了用于活细胞FLIM生物感知的最佳环境敏感染料.
- 实时成功监测内源性Cdc42形状变化.
- 证明FLIM数据的相位分析消除了比率成像工件.
- 在细胞中量化活性Cdc42的特定度.
结论:
- 环境敏感的染料与FLIM和相位分析相结合,为活细胞生物传感提供了强大的工具.
- 这种方法使得蛋白质活性,特别是Cdc42.42的无人工物量化成为可能.
- 开发的方法促进了研究细胞信号通路在它们的原生环境中的研究.
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