A novel and versatile nanomachine for ultrasensitive and specific detection of microRNAs based on molecular beacon initiated strand displacement amplification coupled with catalytic hairpin assembly with DNAzyme formation.

微小RNA（miRNAs）是可用于临床诊断的潜在生物标志物，亟需简单、快速且序列特异性的检测方法。本文报道了一种基于分子信标启动的链置换扩增（SDA）与催化发夹组装（CHA）及DNAzyme形成的比色策略，用于超灵敏、特异性检测miRNAs。目标miRNA触发SDA释放切口DNA触发子，进而启动CHA产生大量CHA产物；这些产物与血...