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一个没有逆转录的CRISPR/Cas12a生物传感器,用于超敏感检测SARS-CoV-2变种

Xiang Xiao¹, Yangqing Zhong¹, Huiyun Xie¹

¹Guangdong Provincial Key Laboratory of Medical Immunology and Molecular Diagnostics, The First Dongguan Affiliated Hospital, School of Medical Technology, Guangdong Medical University, Dongguan, 523808, China.

|November 7, 2025

概括

这项研究引入了一种新的CRISPR/Cas12a生物传感器,用于快速检测没有逆转录的SARS-CoV-2变种. 该试验实现了高灵敏度和特异性,能够快速识别临床样本中的突变.

科学领域:

分子生物学分子生物学
生物技术是生物技术.
传染病诊断传染病诊断传染病诊断

背景情况:

准确和快速检测SARS-CoV-2变种对于公共卫生至关重要.
现有的诊断方法通常需要逆转录,增加时间和复杂性.
基于CRISPR的生物传感器为核酸检测提供了高特异性.

研究的目的:

开发一种无反转录的方法,用于同时检测SARS-CoV-2突变变种.
使用CRISPR/Cas12a系统来提高检测灵敏度和特异性.
在临床样本上验证试验的性能.

主要方法:

开发了一种无反转录的同热指数放大反应 (RTF-SP-EXPAR).
整合RTF-SP-EXPAR与CRISPR/Cas12a生物传感器进行信号生成.
直接识别和放大RNA目标,使其成为单链和双链DNA产品.
使用crRNA触发Cas12a附带活动,用于光信号检测.

主要成果:

在1小时内,RTF-SP-EXPAR-CRISPR/Cas12a生物传感器检测到SARS-CoV-2突变.
实现了低检测极限 (7.49 aM) 和广泛的动态范围 (10 aM到 10 pM).
与DNA测序相比,在分析106个临床样本时显示出100%的灵敏度和100%的特异性.

结论:

开发的试验提供了一种快速,敏感和特定的方法来检测SARS-CoV-2变种.
消除反转录步骤简化了诊断工作流程.
该试验显示了在RNA病毒检测中临床应用的重大潜力.

关键词:

这就是CRISPR/Cas12a.光检测法光检测法在SARS-CoV-2变种中.自动打印机异热指数放大反应反应

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