一个无标签的光传感器,用于基于光PDA纳米粒子的快速和灵敏的ctDNA检测
Xiao Yang1, Yang Huang1, Siyi Yang1
1Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing 400044, PR China. houcj@cqu.edu.cn.
The Analyst
|August 31, 2023
概括
一种新的光生物传感器可以使用MnO2纳米片和光聚多巴胺纳米粒子无标签检测循环瘤DNA (ctDNA). 这种快速而敏感的方法在癌症诊断中显示出液体活检应用的前景.
科学领域:
- 生物标志物检测检测 生物标志物检测
- 纳米技术纳米技术
- 癌症的诊断 癌症的诊断
背景情况:
- 循环瘤DNA (ctDNA) 检测方面的进展提供了新的诊断和治疗选择.
- 目前分析ctDNA生物标记物的有效和实用的方法有限.
研究的目的:
- 设计一个光生物传感器,用于无标签检测ctDNA.
- 为了利用MnO2纳米片和光聚多巴胺纳米粒子用于敏感的ctDNA检测.
主要方法:
- 一个基于MnO2纳米片对单链DNA (ssDNA) 和双链DNA (dsDNA) 的差异亲和力的生物传感器.
- MnO2纳米片催化多巴胺氧化成光聚多巴胺纳米粒子 (FL-PDA NPs) 用于信号生成.
- 检测涉及光强度的变化,由于目标ctDNA结合和随后的MnO2纳米板活性部位恢复.
主要成果:
- 生物传感器实现了380 pM的检测极限和25-125 nM的线性范围.
- 检测在45分钟内完成,具有高特异性,稳定性和可重复性.
- 证明了在血清样本和细胞溶解物中检测ctDNA的成功应用.
结论:
- 光聚多巴胺纳米粒子作为一种有效的光信号,用于快速,无标签的ctDNA检测.
- 拟议的战略为在无放大液体活检中检测生物标志物提供了一个有希望的方法.
- 这种生物传感器为在临床环境中推进ctDNA分析提供了可靠的工具.
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