通过刺激拉曼散射显微镜用小分子振动探针对细胞内进行成像
Elsy El Khoury1,2, Symara de Melo Silva1, Naixin Qian2
1Department of Chemistry, New York University New York NY 10003 USA daniela.buccella@emory.edu.
Chemical science
|November 12, 2025
概括
一个新的振动探测器,CSZin,可以通过刺激拉曼散射 (SRS) 显微镜在活细胞中敏感检测离子 (Zn2+). 这一进步为生物系统中的金属成像提供了新的工具.
科学领域:
- 化学生物学是化学生物学.
- 生物成像是一种生物成像.
- 频谱学是一种光谱学.
背景情况:
- 刺激拉曼散射 (SRS) 显微镜是一种强大的生物成像技术.
- 在生物系统中检测金属离子的化学探针的开发,特别是使用SRS,落后于仪器仪表的进步.
- 现有的响应探测器很少用于动态检测过渡性,低丰度的物种,如Zn2+.
研究的目的:
- 设计和应用CSZin,一种用于在生物环境中检测Zn2+的小分子振动探针.
- 为了证明CSZin在SRS成像中对Zn2+的实验室和活细胞中的实用性.
- 探索CSZin在检测其他生物相关金属离子方面的潜力.
主要方法:
- 设计的CSZin,一个基于spiropyran的探针与一个化组敏感的金属结合.
- 使用SRS显微镜进行无标签的振动成像.
- 在体外和活细胞成像实验中检测Zn2+离子.
- 分析SRS强度和比率变化以量化Zn2+水平.
主要成果:
- 在结合Zn2+时,CSZin表现出烯拉伸频率的变化和SRS强度的增加.
- 在体外成功检测到Zn2+离子.
- 基于识别的Zn2+在活细胞中的SRS成像的首次演示.
- 在正常和瘤细胞中观察到可变Zn2+池的变化,与癌症进展相关.
- CSZin对偏磁性离子产生反应,使其能够启动检测.
结论:
- CSZin是一种有效的振动探针,用于在生物环境中使用SRS显微镜检测Zn2+.
- 这种探测器可以在活细胞和癌症模型中对Zn2+池的动态变化进行成像.
- CSZin的模块化设计对开发用于其他金属离子的传感器具有前景.
- 这项工作扩大了生物成像的化学工具箱,为具有挑战性的物种提供了光的替代方案.
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