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文章编号: 1672-6987(2025)04-0029-08DOI: 10.16351/j.1672-6987.2025.04.004
赵林, 何鹏*, 李东祥(青岛科技大学 化学与分子工程学院, 山东 青岛 266042)
摘要: 实现肿瘤标志物miRNA的精准检测对于癌症早期诊断有着重要意义。本工作设计了一种基于金钼复合基底材料(Au-MoOx)并且结合催化发夹组装(CHA)实现miRNA电化学-拉曼双模式检测。电磁增强和化学增强的协同作用使复合基底材料具有优异的SERS性能,而且信号分子与基底之间的快速电荷转移展现出良好的电化学性能。靶miRNA21能够触发CHA反应生成大量Y型DNA结构,使MB分子富集到电极表面,从而实现高灵敏双模式检测,并且检测限为19.06 amol · L-1(拉曼检测)和0.47 fmol · L-1(电化学检测)。所构建的双模式传感器为miRNA的检测提供了强有力的工具,在临床早期诊断方面有着广阔的前景。
关键词: 复合材料; CHA; miRNA检测; 双模式检测
中图分类号: O 657.3 文献标志码: A
引用格式: 赵林, 何鹏, 李东祥. 基于金钼复合材料的双模式传感器用于检测肿瘤标志物miRNA-21[J]. 青岛科技大学学报(自然科学版), 2025, 46(4): 29-36.
ZHAO Lin, HE Peng, LI Dongxiang. A dual-mode sensor used to detect tumor marker miRNA-21 based on Au-Mo composite[J]. Journal of Qingdao University of Science and Technology(Natural Science Edition), 2025, 46(4): -.
A Dual-Mode Sensor Used to Detect Tumor Marker miRNA-21 Based on Au-Mo Composite
ZHAO Lin, HE Peng, LI Dongxiang(College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)
Abstract: The accurate detection of tumor biomarker miRNA is very important for early diagnosis of cancer. Therefore, a novel composite substrate based on Au-Mo (Au-MoOx) was designed and combined with catalytic hairpin assembly (CHA) to realize miRNA EC-SERS dual-mode detection. The synergistic effect of electromagnetic and chemical enhancement makes the composite substrate material have excellent SERS performance, and the fast charge transfer between signal molecule and substrate exhibits well electrochemical performance. The target miRNA-21 can trigger the CHA reaction to generate a large number of Y-type DNA structures, which enrich MB molecules to the electrode surface, achieving highly sensitive dual-mode detection, the detection limit was 19.06 amol · L-1 (Raman detection) and 0.47 fmol · L-1 (electrochemical detection). The dual-mode sensor provides a powerful tool for miRNA detection and has a broad prospect in early clinical diagnosis.
Key words: composite materials; CHA; miRNA detection; dual-mode detection
收稿日期: 2024-08-22
基金项目: 国家自然科学基金项目(21975139).
作者简介: 赵林(1997—), 男, 硕士研究生. * 通信联系人.