一个基于Zn-doped碳点的转化素反应性光探针,用于在血清中选择性检测Fe3+
Yuxin Tian1, Lixian Yi2, Ruhong Yan3
1Department of Biomaterials and Stem Cells, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Science (CAS), Suzhou, 215163, China.
Analytica chimica acta
|January 12, 2026
概括
这项研究开发了配的植物衍生碳点 (Zn-PECDs) 作为一种双响应的光探针,用于检测生物流体中的Fe3+和Cu2+. 探测器通过蛋白质介导的屏蔽机制在血清中选择性检测Fe3+,克服矩阵干扰.
科学领域:
- 生物医学工程 生物医学工程
- 分析化学 分析化学
- 材料科学 材料科学 材料科学
背景情况:
- 在生物流体中检测Fe3+和Cu2+对于诊断至关重要,但由于复杂的生物矩阵和干扰而具有挑战性.
- 现有的方法往往缺乏实时功能,选择性,易受生物分子相互作用的影响,需要强大的传感器.
研究的目的:
- 开发一种双功能光探针,可靠量化Fe3+和Cu2+在生物系统中的含量.
- 在生理学金属离子检测中克服矩阵干扰和生物分子相互作用的挑战.
主要方法:
- 使用一溶热方法合成添加植物衍生碳点 (Zn-PECDs).
- 使用Zn-PECDs作为一种双响应的光探针,对水溶液和血清中的Cu2+和Fe3+有不同的反应.
- 研究探针在稀释的人体血清中的性能,重点是通过蛋白质介导的屏蔽机制检测Fe3+.
主要成果:
- Zn-PECDs在水溶液中表现出Cu2+的选择性"开启"光和Fe3+的"关闭".
- 在血清中,Cu2+检测受到阻碍,但Fe3+检测显示出由于稳定的Zn-PECDs@transferrin复合体形成而引起的"启动"信号.
- 在稀释的人体血清中实现了选择性Fe3+检测,线性范围为1-90μM,检测极限为1.5μM,显示出出色的可重复性和生物相容性.
结论:
- -PECD作为一个强大的双功能探针监测Cu2+和Fe3+,解决生理金属离子检测的关键挑战.
- 一种新的蛋白质介导屏蔽机制被发现,为设计生物相容纳米传感器提供了洞察力.
- 这种方法提高了临床诊断中的精确金属离子量化,并为先进的生物相容传感器平台铺平了道路.
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