快速反应的线粒体向光探头用于H2S成像在瘤和炎症
Huixiang Wang1,2,3, Erting Feng2,3, Huizhen Ma2,3
1College of Chemistry and Chemical Engineering, School of Medicine, Linyi University, Shandong 276005, China.
Chemical & biomedical imaging
|November 28, 2025
概括
研究人员开发了一种新的近红外光探头HCy-SSPy,用于实时可视化硫化 (H2S). 这种探测器能够在生物系统中快速,灵敏和选择性地检测H2S,帮助疾病研究.
科学领域:
- 化学生物学 化学生物学
- 生物医学成像技术 生物医学成像技术
- 分子探头分子探头
背景情况:
- 硫化 (H2S) 在生理和病理过程中起着至关重要的作用.
- 有效的实时监测动态H2S变化对于了解疾病发展至关重要.
- 目前用于H2S的可视化方法往往缺乏特异性,灵敏性或速度.
研究的目的:
- 开发一种新的近红外 (NIR) 光探测器,用于灵敏和快速检测H2S.
- 调查探头在生物成像中的性能,包括细胞和体内应用.
- 探索探测器在研究与H2S相关的生物过程中的潜力,例如炎症.
主要方法:
- 一个NIR光探针 (HCy-SSPy) 的合成,利用一个半氨酸 (HCy-NH2) 光体和不对称的二硫化物 (SSPy) 识别单元.
- 探测器的光谱特性和对H2S的反应的描述,重点关注765nm的NIR辐射.
- 评估探头的选择性,灵敏度和响应时间,以检测H2S.
- 评估探针的细胞毒性,亚细胞局部化 (线粒体) 和细胞成像能力.
- 在携带瘤的小鼠中H2S的体内成像和在炎症过程中检测H2S的应用.
主要成果:
- 在与H2S反应时,HCy-SSPy探头在765nm处呈现出显著的NIR"启动"光信号.
- 探测器在大约5秒内展示了出色的选择性,高灵敏度和快速H2S检测能力.
- HCy-SSPy显示出低细胞毒性和线粒体内的特定定位,具有有效的细胞成像性能.
- 在携带瘤的小鼠中成功实现了H2S的体内成像.
- 探测器显示了在炎症过程中检测H2S的潜力.
结论:
- HCy-SSPy是一种高效的NIR光探测器,用于快速和灵敏的H2S实时成像.
- 探测器的特性使其适用于生物应用,包括细胞成像和体内研究.
- HCy-SSPy有望在疾病机制中推进H2S的研究,特别是在瘤学和炎症方面.
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