Dual-amplified strategy for ultrasensitive electrochemical biosensor based on click chemistry-mediated enzyme-assisted target recycling and functionalized fullerene nanoparticles in the detection of microRNA-141.

本研究构建了一种基于双放大策略的超灵敏电化学生物传感器，用于痕量microRNA-141（miRNA-141）检测。首先，通过铜(I)催化叠氮-炔环加成（CuAAC）点击化学将两条含G-四链体的分裂DNA链连接，形成完整G-四链体捕获探针；该探针与miRNA-141互补杂交形成DNA-RNA双链。随后，双链特异性核酸酶（DSN）特异...