PCDetection: PolyA-CRISPR/Cas12a-based miRNA detection without PAM restriction

文献类型： 外文期刊

第一作者： Zhong, Mingtian

作者： Zhong, Mingtian;Chen, Kaizhao;Ma, Xiaodong;Zhong, Mingtian;Huang, Xingxu;Zhong, Mingtian;Huang, Xingxu;Wang, Xinjie;Sun, Wenjun;Li, Xiangyang;Huang, Shisheng;Huang, Xingxu;Meng, Qingzhou;Wang, Xinjie;Ma, Peixiang;Ma, Peixiang;Wang, Xinjie;Ma, Xiaodong

作者机构：

关键词： CRISPR; Cas12a; Detection; microRNA

期刊名称：BIOSENSORS & BIOELECTRONICS （ 影响因子：12.545； 五年影响因子：10.722 ）

ISSN： 0956-5663

年卷期： 2022 年 214 卷

页码：

收录情况： SCI

摘要： MicroRNAs (miRNAs) are small noncoding RNAs that posttranscriptionally regulate gene expression. The aberrant expression of miRNAs is related to many diseases. MiRNAs can serve as potential biomarkers for the prognosis and diagnosis of cancers and other human diseases. However, the short sequence and high sequence similarity of miRNAs impede detection. Herein, we propose a method to integrate polyA-tailing and CRISPR/ Cas12a to amplify and detect all miRNAs with high specificity and sensitivity. PolyA-tailing enables efficient amplification of RNA and introduces a universal PAM sequence for Cas12a to unlock its PAM restriction. The CRISPR-Cas system guarantees the specific recognition of nucleic acid sequences with a single base mismatch. A limit of detection (LOD) as low as 50 fM was achieved. The practical application ability of polyA-CRISPR/ Cas12a-based miRNA detection was validated by miRNA analyses in multiple cancer cell samples. With the increasing stability of RNA samples, low cost, excellent specificity, and sensitivity, this method demonstrates great potential to scale up to parallel diagnostic sets for miRNA-related disease.

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