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一个快速,生物相容的开启NIR探头用于活细胞和斑马鱼中的铁离子成像
Leqin Cheng1, Boxing Geng1, Rui Wang2
1School of Chemistry and Pharmaceutical Engineering, Jilin University of Chemical Technology, JilinJilin, 132022, China.
Analytical and bioanalytical chemistry
|February 9, 2026
概括
一个新的光探测器,DCMB,专门检测铁离子 (Fe2+),具有高灵敏度和快速响应. 其广泛的pH值范围和选择性使其非常适合用于生物成像和复杂样本分析.
科学领域:
- 化学生物学 化学生物学
- 分析化学 分析化学
- 生物医学工程 生物医学工程
背景情况:
- 铁离子 (Fe2+) 在生物过程中起着至关重要的作用.
- 精确检测Fe2+对于了解细胞功能和疾病至关重要.
- 现有的检测方法往往缺乏特异性,敏感性或适合生物应用的pH范围.
研究的目的:
- 开发一种新的近红外光探针,用于特定和敏感地检测Fe2+.
- 为了评估探头在各种pH条件和生物矩阵中的性能.
- 为了证明探头在活细胞和体内成像中的实用性.
主要方法:
- 一个基于propanedinitrile-benzopyran的光探针的合成,DCMB.
- 探测器光物理特性和对Fe2+的反应的描述.
- 对其他金属离子和干扰物质的选择性评估.
- 评估探头在一系列pH值的性能.
- 探针在活细胞和斑马鱼中进行光成像的应用.
主要成果:
- 在与Fe2+结合时,DCMB表现出"启动"的光反应.
- 实现了5.6μM的低检测极限,快速响应时间为90秒.
- 在pH范围5.0-7.5中保持强大的性能,包括酸性瘤微环境.
- 在其他生物相关金属离子上对Fe2+具有很高的选择性.
- 成功申请了体外和体内成像,展示了其在复杂生物系统中的潜力.
结论:
- DCMB是一种高度敏感和选择性的近红外光探测器,用于Fe2+检测.
- 它的广泛的操作pH范围和特异性使其能够在生理和病理条件下可靠检测.
- 该探头适用于先进的应用,例如Fe2+的活细胞和体内成像.
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