数字农科院2.0

MscI restriction enzyme cooperating recombinase-aided isothermal amplification for the ultrasensitive and rapid detection of low-abundance EGFR mutations on microfluidic chip

文献类型： 外文期刊

作者： Xu S.;Wang X.;Wu C.;Zhu X.;Deng X.;Wu Y.;Liu M.;Huang X.;Wu L.;Huang H.

作者机构：

关键词： （2-0-2）CRISPR-Cas12a;DNA point mutation;Lung cancer;Microfluidic chip;MscI restriction enzyme

期刊名称： Biosensors and Bioelectronics

ISSN： 0956-5663

年卷期： 2024 年 247 卷

页码：

收录情况： SCIE（2024版） ; ; EI（2024版）

摘要： The detection of low-abundance mutation genes of the epidermal growth factor receptor (EGFR) exon 21 (EGFR L858R) plays a crucial role in the diagnosis of non-small cell lung cancer (NSCLC), as it enables early cancer detection and facilitates the development of treatment strategies. A detection platform was developed by combining the MscI restriction enzyme with the recombinase-aided isothermal amplification (RAA) technique (MRE-RAA). During the RAA process, “TGG^CCA” site of the wild-type genes was cleaved by the MscI restriction enzyme, while only the low-abundance mutation genes underwent amplification. Notably, when the RAA product was combined with CRISPR-Cas system, the sensitivity of detecting the EGFR L858R mutation increased by up to 1000-fold for addition of the MscI restriction enzyme. This achievement marked the first instance of attaining an analytical sensitivity of 0.001%. Furthermore, a disk-shaped microfluidic chip was developed to automate pretreatment while concurrently analyzing four blood samples. The microfluidic features of the chip include DNA extraction, MRE-RAA, and CRISPR-based detection. The fluorescence signal is employed for detection in the microfluidic chip, which is visible to the naked eye upon exposure to blue light irradiation. Furthermore, this platform has the capability to facilitate early diagnosis for various types of cancer by enabling high-sensitivity detection of low-abundance mutation genes. © 2023

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