基于RAA-CRISPR Cas12a系统的Listeria monocytogenes的快速核酸检测 基于RAA-CRISPR Cas12a系统
Yujuan Yang1, Xiangxiang Kong2,3, Jielin Yang4
1School of Life Sciences, Shanghai University, Shanghai 200444, China.
International journal of molecular sciences
|March 28, 2024
概括
一种新的复合酶辅助放大 (RAA) 辅助的CRISPR/Cas12a光测定能够快速而灵敏地检测出Listeria monocytogenes. 与国家标准相比,这种方法为识别食物传播病原体提供了更好的速度和准确性.
科学领域:
- 分子生物学分子生物学
- 食品安全 食品安全
- 生物技术是生物技术.
背景情况:
- 李斯特菌单细胞菌是一种危险的食源性病原体,引起高死亡率的李斯特菌病.
- 现有的L. monocytogenes检测方法缺乏所需的灵敏度,速度和操作方便性.
- 受污染的食品,特别是动物衍生和冷藏产品,对公众健康构成重大风险.
研究的目的:
- 开发一种高度灵敏,快速和用户友好的核酸检测技术来检测L. monocytogenes.
- 建立一个辅助复合酶放大 (RAA) 辅助的CRISPR/Cas12a光平台.
- 评估RAA-CRISPR/Cas12a系统在食品矩阵中检测L. monocytogenes的性能.
主要方法:
- 开发一种辅助复合酶放大 (RAA) 的辅助CRISPR/Cas12a光试验.
- 使用纯细菌培养和基因组DNA测试灵敏度.
- 评估对各种李斯特菌种和其他常见病原细菌的特异性.
- 验证使用与L. monocytogenes添加的丰富牛肉样本.
主要成果:
- 在RAA-CRISPR/Cas12a测定显示高灵敏度 (350CFU/mL和5.4×10^-3 ng/μL) 和特异性.
- 在2小时内检测到2.3CFU/25g的L. monocytogenes在丰富的牛肉样本中.
- 结果可以在5分钟内观察到,放大在20-30分钟内完成.
- 比国家标准方法快得多,更灵敏.
结论:
- 已建立的RAA-CRISPR/Cas12a系统为诊断食物传播病原体提供了一个有前途的新工具.
- 该方法为食品安全应用中检测L. monocytogenes提供了一种快速,灵敏和特定的方法.
- 该系统的效率超过了当前的国家标准,提高了食品传播病原体监测.
相关概念视频
CRISPR and crRNAs
17.0K
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...
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...
17.0K
CRISPR
50.8K
Genome editing technologies allow scientists to modify an organism’s DNA via the addition, removal, or rearrangement of genetic material at specific genomic locations. These types of techniques could potentially be used to cure genetic disorders such as hemophilia and sickle cell anemia. One popular and widely used DNA-editing research tool that could lead to safe and effective cures for genetic disorders is the CRISPR-Cas9 system. CRISPR-Cas9 stands for Clustered Regularly Interspaced...
50.8K


