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一个自适应式双重CRISPR/Cas12a分子放大器的工程允许对Vibrio parahaemolyticus进行可靠的分析

Yubo Peng¹, Pengpeng Xue¹, Renjing Wang¹

¹Engineering Research Center of Bio-process, Ministry of Education, School of Food and Biological Engineering, Hefei University of Technology, Hefei, 230009, PR China.

|August 11, 2023

概括

一种新的自适应式双重CRISPR/Cas12a方法提高了致病细菌的检测. 这种分子放大器为Vibrio parahaemolyticus提供了灵敏和快速的诊断工具,改善了食品安全和人类健康监测.

科学领域:

分子生物学分子生物学
生物技术是生物技术.
食品安全的诊断食品安全的诊断

背景情况:

准确检测致病细菌,如Vibrio parahaemolyticus对于公共卫生和食品安全至关重要.
现有的诊断方法往往需要复杂的程序,缺乏灵敏度.

研究的目的:

开发一种新的,高度敏感的分子诊断方法,用于快速检测Vibrio parahaemolyticus.
为增强信号生成设计一个自适应式 CRISPR/Cas12a 系统.

主要方法:

重组酶聚合酶放大 (RPA) 的整合用于初始DNA放大.
使用终端脱核样转移酶 (TdT) 进行无模板链延长.
在信号放大和记者分子检测中应用CRISPR/Cas12a介导的跨裂变.

主要成果:

开发的方法实现了V. parahaemolyticus. 的线性检测范围从1 x 10^2到1 x 10^7 CFU/mL.
在优化条件下,超敏感检测极限 (LOD) 为12.4 CFU/mL.
与传统模型相比,自适应式双重CRISPR/Cas12a系统显示出优异的信号放大.

结论:

适应式合CRISPR/Cas12a分子放大器为V. parahaemolyticus检测提供了一个强大而敏感的平台.
这种创新方法有可能适应在现场病原体监测的常规诊断套件中.
这项研究强调了食品传播病原体分子诊断的重大进展.

关键词:

这就是CRISPR/Cas12a系统.分子诊断是一种分子诊断.再组合酶聚合酶放大 (RPA) 的方法终端脱氧核基基转移酶.这种病毒是Vibrio parahaemolyticus.

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相关概念视频

CRISPR and crRNAs

CRISPR and crRNAs

Bacteria and archaea are susceptible to viral infections just like eukaryotes; therefore, they have developed a unique adaptive immune system to protect themselves. Clustered regularly interspaced short palindromic repeats and CRISPR-associated proteins (CRISPR-Cas) are present in more than 45% of known bacteria and 90% of known archaea.
The CRISPR-Cas system stores a copy of foreign DNA in the host genome and uses it to identify the foreign DNA upon reinfection. CRISPR-Cas has three different...