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通过DNA激活器的3'-end延伸来增强分裂crRNACRISPR/Cas12a活动,用于直接感知microRNA

Lin Hou¹, Fangqi Ruan², Kairen Zhao³

¹Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China; Xianyang Normal University, Xianyang, 712000, China.

Analytica chimica acta

|December 2, 2025

概括

这项研究引入了一种新的分离CRISPR/Cas12a生物传感方法,用于直接检测微RNA. 增强DNA激活器的作用

科学领域:

分子生物学分子生物学
生物技术是生物技术.
生物感应是一种生物感应.

背景情况:

克里斯普尔/卡斯12a的跨裂变活性对生物感知有价值.
传统的CRISPR/Cas12amiRNA检测需要放大或逆转录,增加时间和污染风险.

研究的目的:

开发一个分离CRISPR/Cas12a生物传感系统,用于直接检测miRNA.
通过修改DNA激活器来增强分裂CRISPR/Cas12a的活性.

主要方法:

利用miRNA-375作为直接结合的分裂crRNA结构中的间隔器.
研究了3'-end序列延长对DNA激活器裂变活性的影响.
在稀释的人体血清中应用了针对miRNA检测的优化系统.

主要成果:

一个分裂的CRISPR/Cas12a系统被开发用于直接检测miRNA.
用24个核酸随机序列扩展DNA激活器的3'-end,增强了分裂活动6.4倍.
该系统检测到miRNA-375的线性范围为5 pM-1 nM,检测极限为0.6 pM.
在10%稀释的人体血清中检测到miRNA-375时,获得了令人满意的恢复率 (98%-106%).

结论:

延长DNA激活器的3'-末端增强了分裂CRISPR/Cas12a活动,用于敏感的直接miRNA检测.
这一策略提供了一种简单而有效的方法来提高miRNA生物感知灵敏度.

关键词:

这就是CRISPR/Cas12a.扩展DNA激活器的扩展分裂-crRNARNA是什么意思微RNA检测检测微RNA检测

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