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基于无接触阻抗检测微传感器的分钟级超快速和数千副本级高灵敏病原体核酸识别

Zhikang Zhang¹, Haojun Yuan¹, Renhao Ni²

¹The Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo, 315211, Zhejiang, China; State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, 200050, China.

|July 13, 2024

概括

这项研究引入了一种集成的核酸放大 (NAA) 微传感器,用于快速检测病原体. 这种新型生物芯片能够灵敏快速地识别特定的核酸,大大缩短了疫情预防的测试时间.

科学领域:

生物医学工程生物医学工程
分子诊断学分子诊断
生物传感器技术技术

背景情况:

在流行病期间,早期的病原体查至关重要,但传统的核酸检测 (NAT) 方法缓慢,需要大型仪器.
现有的NAT方法在检测速度和可移植性方面存在局限性,阻碍了有效的疫情应对.

研究的目的:

开发一个集成的微传感器,用于快速和高度敏感的核酸放大 (NAA) 和检测.
通过减少检测时间和仪器尺寸来克服传统NAT的局限性.

主要方法:

设计了一个两层生物芯片,包括一个电极加热器,温度计,数字间电极 (IDE) 和反应室.
利用IDE实时监控NAA过程的阻抗,将阻抗变化与离子释放相关联.
集成了一个加热器和温度计,用于精确的温度控制,这对NAA至关重要.

主要成果:

微传感器实现了6.5°C/s的加热效率和9.36 Ω/°C的温度计灵敏度.
实时阻抗监测能够在3分钟内检测出来自SARS-CoV-2和Vibrio vulnificus的核酸.
达到10^3副本/μL的检测极限 (LOD),显示出高灵敏度.

结论:

集成的NAT微传感器在快速和敏感的病原体检测方面取得了重大进展.
这项技术显示了通过更快,更有效的核酸测试来改善疫情预防策略的巨大潜力.
开发的生物芯片解决了在公共卫生紧急情况下需要便携式和快速诊断工具的需求.

关键词:

阻抗监测阻抗的监控.核酸放大核酸的放大核酸测试传感器的核酸测试传感器.病原体的诊断病原体的诊断

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