由膨胀DNA驱动的CRISPR/Cas12a动态激活电路可以实现高度敏感和多功能生物传感
Luyu Wei1, Ziqi Cheng1, Mingrui Xu1
1The Modernization Engineering Technology Research Center of Ethnic Minority Medicine of Hubei Province, School of Pharmaceutical Sciences, South-Central Minzu University, Wuhan, 430074, China.
Biosensors & bioelectronics
|January 23, 2026
概括
一个新的CRISPR/Cas12a生物传感电路,称为CBD,使用膨胀DNA (BD) 进行指数信号放大. 这种动态激活增强了检测核酸和毒素等非核酸点的灵敏度.
科学领域:
- 生物技术是生物技术.
- 分子生物学分子生物学
- 分析化学 分析化学
背景情况:
- 克里斯普尔/卡斯12a系统提供创新的生物传感能力.
- 在传统的CRISPR/Cas12a中,线性信号积累限制了灵敏度.
- 存在对更敏感和多功能生物传感平台的需求.
研究的目的:
- 开发一种使用CRISPR/Cas12a.a.的高度敏感和多功能生物传感平台.
- 为了克服CRISPR/Cas12a系统中线性信号积累的局限性.
- 为了能够检测核酸和非核酸目标.
主要方法:
- 设计了一个由膨胀DNA (BD) 驱动的CRISPR/Cas12a动态激活电路 (CBD).
- 设计BD可在降解时进行可编程的结构转换,启动自放大Cas12a激活.
- 使用CBD平台开发了用于检测核酸和非核酸标 (杀虫剂,真菌毒素) 的策略.
- 构建了一个"OR"逻辑门,用于同时检测双重真菌毒素.
主要成果:
- 实现了高灵敏度的检测甲基西林耐药黄金葡萄球菌降至14 CFU/mL.
- 启用了杀虫剂和真菌毒素在每毫升皮克克拉的水平检测.
- 使用"OR"逻辑门,成功地同时检测了双重真菌毒素.
- CBD系统显示出Cas12a电路的指数级,自我放大激活.
结论:
- 由膨胀DNA (BD) 驱动的CRISPR/Cas12a动态激活电路 (CBD) 显著提高了生物感知灵敏度和多功能性.
- CBD平台有效地检测核酸和非核酸目标.
- CBD代表了下一代生物传感技术的有希望的新范式,包括多重危险监测.
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