基于RPA辅助的CRISPR/Cas12a,用于吐性Bacillus cereus的通用和裸眼诊断平台
Jing-Nan Meng1,2,3, Ze-Ke Xu1, Peng-Ru Li1
1Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China.
Journal of agricultural and food chemistry
|April 5, 2024
概括
使用重组酶聚合酶放大 (RPA) 和CRISPR/Cas12a的新诊断平台可以检测吐性Bacillus cereus. 这种快速,灵敏的方法为食品安全应用提供了肉眼检测.
科学领域:
- 食品微生物学 食品微生物学
- 分子诊断学 分子诊断学
- 生物技术是生物技术.
背景情况:
- 排泄性细菌 (B. cereus) 构成严重的公共卫生风险,导致食物中毒和严重的健康并发症.
- 准确和快速的检测方法对于预防疫情和确保食品安全至关重要.
研究的目的:
- 开发一个通用的裸眼诊断平台,用于检测吐性B. cereus.
- 针对cereulide合成酶生物合成基因 (cesB) 进行特定识别.
主要方法:
- 使用复合酶聚合酶放大 (RPA) 与CRISPR/Cas12a技术相结合.
- 开发了一种单检测系统,其中的组件分别添加到管底和盖上.
- 使用基因组DNA (gDNA) 和细菌细胞验证了平台,包括添加食品样本.
主要成果:
- 实现了对gDNA的10^-2 ng μL^-1和细胞的10^2 CFU mL^-1的视觉检测极限.
- 在大米,牛奶和熟肉样本中表现出一致的敏感性,即使是简单的gDNA提取.
- 在40分钟内完成了整个检测过程,在2-5小时的丰富后,单细胞检测是可能的.
结论:
- 通过RPA辅助的CRISPR/Cas12a平台提供了高特异性,灵敏性,速度和简单性.
- 这种测试代表了RPA-CRISPR/Cas12a在吐性B. cereus检测中的首次应用.
- 该平台是一个有前途的工具,用于在现场检测各种食物矩阵中的排泄性B. cereus.
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