一步式RPA-CRISPR/Cas12a方法开发和灵敏度优化范式 快速检测难以放大基因的NDM
Lingtao Sun1,2,3, Zishu Liu3, Chifei Dong2,3
1Hainan Institute, Zhejiang University, Sanya 572025, People's Republic of China.
Environmental science & technology
|February 5, 2026
概括
一种新的MOSAIC试验结合了RPA和CRISPR/Cas12a,以快速,灵敏地检测NDM碳烯酶基因. 这种方法提供了一个便携式解决方案,用于监测各种环境中的抗生素耐药性基因.
科学领域:
- 分子生物学分子生物学
- 抗微生物耐药性研究的研究.
- 生物技术是生物技术.
背景情况:
- 抗生素耐药性基因 (ARG) 构成了严重的全球健康威胁.
- 有效的ARG监测方法至关重要,但在平衡灵敏度,速度和可移植性方面面临挑战.
- 碳烯抗性基因*bla*NDM是监测的一个关键目标.
研究的目的:
- 开发一种快速,灵敏和便携式的一步测试,用于检测黑色NDM基因.
- 为了建立一个灵敏度优化范式,MOSAIC,用于RPA-CRISPR/Cas12a测试.
- 在临床和环境样本中评估MOSAIC试验的性能.
主要方法:
- 开发一个整合复合酶聚合酶放大 (RPA) 和CRISPR/Cas12a的一步测定.
- 实施MOSAIC (通过集成CRISPR/Cas12a进行多策略优化敏感测试) 模式来提高灵敏度.
- 优化策略包括组件调整,亚最佳PAM介导的CRISPR抑制和糖醇辅助的相分离.
主要成果:
- 在将优化策略结合起来时,MOSAIC范式在灵敏度上实现了1万倍的改进.
- 该试验达到*bla*NDM的检测极限 (LOD) 为260副本/μL,与qPCR可比.
- 该试验在临床隔离物中提供了高诊断灵敏度 (100%) 和特异性 (95.45%),并且在37°C的环境样本中在1小时内提供了良好的准确性.
结论:
- 开发的MOSAIC试验提供了一种敏感,快速和潜在的便携式方法来检测*bla*NDM基因.
- MOSAIC优化范式为增强其他单步RPA-CRISPR/Cas12a试验提供了一个有价值的框架.
- 这项技术可以促进对关键抗生素耐药性基因的现场监测.
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