快速和简单的检测Mycobacterium avium亚种. 使用基于CRISPR-Cas12a结合复合酶聚合酶放大或嵌套PCR的侧向流量试验
Yue-Rong Lv1, Yi-Yang Liu1, Rong Zhang2
1College of Veterinary Medicine, Inner Mongolia Agricultural University, Hohhot 010018, China.
Pathogens (Basel, Switzerland)
|January 28, 2026
概括
这项研究开发了使用复合酶聚合酶放大 (RPA) 或嵌套PCR与CRISPR-Cas12a检测相结合的在反动物中对甲状腺结核病 (PTB) 的快速和敏感的诊断方法. 这些测试提供灵活,准确的检测,以有效控制PTB.
科学领域:
- 兽医诊断 兽医诊断 兽医诊断 兽医诊断
- 分子生物学分子生物学
- 微生物的病原发生.
背景情况:
- 结核病 (PTB),是由Mycobacterium avium亚种引起的. 甲状腺结核病 (MAP) 在反动物养殖中是一个巨大的经济负担.
- 目前对PTB的诊断方法缺乏所需的敏感性和特异性,阻碍了有效的控制和根除工作.
- 迫切需要先进的检测技术来准确识别牲畜中MAP感染.
研究的目的:
- 开发和验证用于Mycobacterium avium亚种的新型诊断试验. 结核病 (MAP) 的检测.
- 将复合酶聚合酶放大 (RPA) 和嵌套PCR与CRISPR-Cas12a技术集成,以提高灵敏度和特异性.
- 提供灵活的检测平台,可适应各种资源设置,用于实际的PTB管理.
主要方法:
- 针对RPA和嵌套PCR的MAP ATPase FtsK基因的crRNA和原始基因的设计.
- 使用RPA或嵌套PCR放大便DNA,然后进行净化.
- 使用CRISPR-Cas12a检测放大DNA,通过qPCR仪器,光读取器或横流带读取信号.
- 在临床样本和MAP培养上优化和验证RPA-CRISPR-Cas12a和嵌套PCR-CRISPR-Cas12a试验.
主要成果:
- RPA-CRISPR-Cas12a试验的检测极限为1×10−10μg/μL,而嵌套PCR-CRISPR-Cas12a试验的检测极限为1×10−14μg/μL.
- 在DNA度≥1×10−4μg/μL时观察到有效的ssDNA记者裂变,产生强烈的光信号.
- 所有开发的测定方法在测试样本中与参考方法完全一致,证实了高精度和特异性.
结论:
- 这项研究报告了RPA或嵌套PCR与CRISPR-Cas12a用于MAP检测的首次成功集成.
- 开发的分析提供了PTB的快速,高度敏感和特定的诊断能力.
- 灵活的检测选项有助于在各种环境中实现实际应用,从而改善了准结核病控制计划.
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