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Wanting Zeng¹, Wanping Chen¹, Yang Liu¹

¹State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Province Key Laboratory of Industrial Biotechnology, School of Life Sciences, Hubei University, Wuhan, China.

Biosensors & bioelectronics

|May 22, 2024

概括

一种基于CRISPR的新方法PASSPORT实现了超快速的,无预放大核酸检测,用于临床检测. 这种快速测试显示了在临床样本中检测病毒病原体的高灵敏度和准确性.

科学领域:

生物技术是生物技术.
分子诊断学分子诊断
这就是CRISPR技术.

背景情况:

基于CRISPR的核酸检测为治疗点检测 (POCT) 提供了潜力.
目前的CRISPR方法面临的局限性包括预放大要求和长时间的测试时间.
这些挑战阻碍了在快速诊断环境中广泛的实际应用.

研究的目的:

为POCT开发一种基于CRISPR的超快,超灵敏,没有预放大功能的检测系统.
解决现有的CRISPR诊断技术的局限性.
为快速病原体识别创建一个多功能平台.

主要方法:

使用LwaCas13a和设计的RNA结构 (URH) 开发了一种自我级联信号放大策略.
整合了URH,特定crRNAs,光RNA记者和LwaCas13a到PASSPORT系统中.
验证了检测特定RNA标的系统,并将其应用于临床标本.

主要成果:

在5分钟内达到低至100副本/毫升的检测极限.
在临床样本中检测SARS-CoV-2和SFTSV的100%准确性 (分别为100和16个标本).
成功地将测试与侧向流量装置集成为用户友好的POCT.

结论:

PASSPORT系统提供了一个快速,灵敏和特定的核酸检测平台.
它克服了当前CRISPR诊断的关键局限性,使前放大无需测试成为可能.
PASSPORT为开发无设备的POCT生物传感器提供了一个有希望的替代方案,用于大规模查和疫情应对.

关键词:

这就是CRISPR/Cas13a.侧流是侧向流的情况.在护理场所进行检测.没有预放大,没有预放大.这就是SARS-CoV-2病毒.

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