Detecting CYP2C19 genes through an integrated CRISPR/Cas13a-assisted system

CYP2C19 gene single nucleotide polymorphisms (SNPs) should be considered in the clinical use of clopidogrel as they have important guiding value for predicting the risk of bleeding and thrombosis after clopidogrel treatment. The CRISPR/Cas system is increasingly used for SNP detection owing to its single-nucleotide mismatch specificity. Simultaneous detection of multiple SNPs for rapid identification of the CYP2C19 genotype is important, but there is no method to detect a wide variety of CYP2C19 SNPs. This study proposes a new integrated system that integrates the PCR reaction and CRISPR/Cas detection of three CYP2C19 genes on a device, achieving rapid, sensitive, and specific detection. In our design, magnetic beads with three different sizes capture target nucleic acid from the sample, which are dragged through different areas by magnetic force, for PCR amplification reaction and CRISPR/Cas13a detection of CYP2C19*2, CYP2C19*3 and CYP2C19*17 genes. Note that magnetic beads were sorted via microporous PC membranes of different apertures. This study exhibits a broad clinical application prospect and provides a favorable tool for clinical clopidogrel administration.