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来自CRISPR/Cas12a的比度光传感器用于基于CDs@ZIF-8和DNAzyme的高灵敏Pb2+检测

Chuanyu Yang¹, Caiyi Du¹, Feiyu Yuan¹

¹Department of Food Quality and Safety, College of Food Science and Engineering, Jilin University, Changchun 130062, China.

Biosensors & bioelectronics

|February 14, 2024

概括

一个使用CRISPR/Cas12a和碳点@zeolitic imidazolate框架-8复合材料的新型比度光传感器,可以灵敏地检测离子 (Pb2+). 这种双信号系统通过最小化环境干扰来提高准确性.

科学领域:

生物技术是生物技术.
纳米技术纳米技术
环境科学环境科学

背景情况:

对于生物传感器来说,CRISPR/Cas12a系统提供了目标识别和跨分区.
现有的使用分子信标的CRISPR/Cas12a传感器具有单色发射,容易受到环境干扰.

研究的目的:

开发一个比度光传感器,用于高灵敏度和精确检测离子 (Pb2+).
为了克服基于CRISPR/Cas12a的传感器中单色辐射和环境干扰的局限性.

主要方法:

设计了一种CRISPR/Cas12a衍生传感器,使用碳点@地质石化伊米达酸框架-8 (CDs@ZIF-8) 复合材料.
集成的ZIF-8用于封装红色发射CD和吸附DNA,创建双光信号.
使用GR5DNAzyme将Pb2+存在转化为CRISPR/Cas12a系统的激活剂.

主要成果:

实现了对Pb2+的敏感检测,低检测极限为18 pM.
基于CDs@ZIF-8双信号的比度光方法减少了干扰,提高了传感精度.
通过CRISPR/Cas12a的跨裂变活动来证明信号放大.

结论:

开发的比度光传感器为Pb2+检测提供了一种简单,通用和定量方法.
整合CRISPR/Cas12a,CDs@ZIF-8和DNAzyme为敏感的环境传感应用提供了一个强大的平台.

关键词:

这就是CRISPR/CasPR.碳点是一些碳点.领先的检测探测器相对测量光度的光度.泽奥利特化伊米达酸框架

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