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基于Cas13a和Cas12a的登革热病毒的现场可部署的病毒诊断工具

Guozhen Tian¹, Jun Tan², Biao Liu¹

¹Hainan Women and Children's Medical Center, Haikou, Hainan, 571199, China.

Analytica chimica acta

|July 5, 2024

概括

这项研究引入了使用Cas13a和Cas12a酶进行敏感检测的新型登革热病毒 (DENV) 诊断. 该方法为早期登革热诊断提供了一个视觉辅助的,可在现场部署的工具.

科学领域:

分子生物学分子生物学
生物技术是生物技术.
传染性疾病传染性疾病

背景情况:

登革热病毒 (DENV) 诊断具有挑战性,特别是在偏远地区,阻碍及时治疗.
目前的诊断方法往往缺乏广泛使用所需的敏感性,特异性或灵活性.
早期和准确的病原体检测对于有效的疾病控制和患者管理至关重要.

研究的目的:

开发一种敏感和视觉辅助的诊断方法来检测登革热病毒.
实施双倍放大策略,使用Cas13a和Cas12a进行增强信号放大.
创建一个能够在现场部署的登革热病毒诊断工具,克服实验室测试的局限性.

主要方法:

使用了涉及Cas13a和Cas12a酶的双放大系统来检测登革热病毒.
Cas13a识别了目标DENVRNA,触发了Cas12acrRNA的附带分裂,启动了级联放大.
开发了一个视觉检测系统,使用抗体涂层的金纳米粒子和侧向流量测试 (纸条) 来读取信号.

主要成果:

达到低光检测极限为190 fM的登革热病毒.
在1 pM度下在纸条上显示可见的红线检测,表明视觉敏感度.
级联酶增强策略对DENV检测表现出良好的灵敏度和特异性.

结论:

开发的基于Cas13a/Cas12a的双放大系统为登革热病毒诊断提供了一种敏感和可视检测的方法.
这种方法充满希望,可以作为现场部署的诊断工具,特别有利于资源有限的环境.
该战略为开发病毒感染的快速,敏感和可访问的诊断提供了基础.

关键词:

这就是CRISPR/Cas12a.克里斯普尔/卡斯13a是一个.登革热病毒感染者基于纸张的条形纸条.

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