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Three-dimensional Optical-resolution Photoacoustic Microscopy
Published on: May 3, 2011
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用于光声成像的传感器
Sheryl Roberts, Markus Seeger, Yuanyuan Jiang
1CSSB, 22607 Hamburg and Institute for Biophysical Chemistry, Hannover Medical School , 30625 Hannover, Germany.
Journal of the American Chemical Society
|September 26, 2017
概括
我们开发了一种新的光声学传感器 (CaSPA), 这种工具可以在各种生物系统中可视化离子 (Ca2+) 流动,并深入组织.
科学领域:
- 生物医学工程
- 光学成像
- 分子生物学
背景情况:
- 光声学成像提供深层组织透,用于绘制光吸收分子.
- 现有的传感器缺乏选择性或不适合光声学应用.
- 了解动态离子 (Ca2+) 变化在细胞过程中至关重要.
研究的目的:
- 开发一种用于光声成像 (CaSPA) 的新型细胞透传感器.
- 实现细胞内离子 (Ca2+) 动态的实时可视化.
- 在各种生物模型中展示传感器的实用性.
主要方法:
- 具有特定光学性能的选择性金属色传感器的合成 (高灭系数,低量子产量,光漂白阻力).
- 优化传感器对Ca2+依赖的光声信号变化,包括吸收的蓝移.
- 开发一种乙甲化变体,以提高细胞吸收效率和最小毒性.
- 在基因未改细胞,心脏器官和斑马鱼幼虫大脑中进行光和光声学成像.
主要成果:
- 在结合微分子度的Ca2+时,CaSPA的吸收率呈现强烈的蓝移.
- Ca2+ 结合导致峰值光声信号的降低.
- 化CaSPA变体显示出有效的细胞透性和缺乏毒性.
- 在包括复杂组织在内的各种生物系统中,成功实现了Ca2+流的实时成像.
结论:
- CaSPA是一种多功能且有效的离子 (Ca2+) 动态光声成像传感器.
- 这项技术在未经基因改造的生物模型中提供了前所未有的Ca2+流量实时成像.
- 它为研究健康和疾病中的信号提供了新的途径.
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