微流体芯片中集成的CRISPR/Cas12a激活脂质体SERS放大,用于超敏感的安培检测
Miao Hu1, Fanghua Liu1, Jun Zhang1
1Key Laboratory of Land Resources Evaluation and Monitoring in Southwest, Ministry of Education, College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610068, China.
Biosensors & bioelectronics
|October 25, 2025
概括
这项研究介绍了一种新型的CRISPR/Cas12a激活的脂质体表面增强拉曼散射 (SERS) 系统,用于超敏感的安培检测. 这种便携式方法通过在现场进行抗生素残留分析来提高食品安全.
科学领域:
- 生物技术和分析化学
- 食品安全和环境监测
背景情况:
- 在牲畜中滥用抗生素导致食品中的残留物,导致人类抗生素耐药性,并构成公共卫生风险.
- 目前对抗生素残留物的分析方法依赖于设备,限制了在偏远地区的现场检测.
- 敏感且易于使用的检测方法对于食品安全和防止滥用抗生素至关重要.
研究的目的:
- 开发一种集成的,超灵敏的西林残留物检测系统.
- 为了在现场,便携式检测食品和环境样本中的抗生素污染.
- 在资源有限的环境中解决传统分析技术的局限性.
主要方法:
- 开发了一个微流体芯片,将CRISPR/Cas12a与脂质体表面增强拉曼散射 (SERS) 集成在一起.
- 采用催化式发针组件 (CHA) 进行初级信号放大,将安皮西林度转换为DNA信号.
- 通过4-MPBA@脂质体标记检测利用Au@Ag基质和SERS进行二次信号放大.
主要成果:
- 实现了一种线性检测范围从1 fM到1 nM的安比西林.
- 建立了一个超敏感的检测极限,低至740 aM.
- 在环境水和牛奶样本中检测安培的稳定性,选择性和灵敏度都很好.
结论:
- 开发的CRISPR/Cas12a激活脂质体SERS系统提供了一个高度敏感和稳定的平台,用于安培的检测.
- 这种基于微流体芯片的方法为现场食品安全和环境监测提供了实用解决方案.
- 这项技术在打击滥用抗生素和保护公共健康方面具有重大潜力.
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