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文章编号:1672-6987(2026)05-0029-09;DOI:10. 16351/j. 1672-6987. 2026. 05. 003
严鸿哲,孙鑫鑫,丁彩凤* (青岛科技大学 化学与分子工程学院,山东 青岛 266042)
摘 要:为了实现肿瘤标志物 miRNA-155 的比率型检测和成像研究,本工作设计了一种由多 个单元组成的比率型荧光纳米探针 FAM/Cy3@EuP,并通过水热法合成了金属有机骨架 EuMOFs。为了达到比率检测的目的,提高 miRNA-155 检测的灵敏度和准确性,将 Cy3 标记于 DNA 链上,使 Cy3-DNA 接枝于 Eu-MOFs 表面后与 FAM 发生荧光共振能量转移(FRET)。 靶标 miRNA-155 可诱导 Cy3-DNA 从 Eu-MOFs 表面解离,解除 FRET 效应,导致红色荧光信 号减弱、绿色荧光信号增强,实现比率型荧光检测。FAM/Cy3@EuP 具有良好的光学特性、细 胞内稳定性和低细胞毒性,可用于细胞内检测和成像研究。其简单的自组装过程和具有靶标 的快速、灵敏的检测对临床检测肿瘤标志物具有重要意义,具有广阔的应用前景。
关键词:荧光纳米探针; FRET; miRNA-155;细胞成像
中图分类号:O 65 文献标志码:A
引用格式:严鸿哲,孙鑫鑫,丁彩凤 . 比率型荧光纳米探针用于检测 miRNA-155[J]. 青岛科 技大学学报(自然科学版),2026,47(5):29-37.
YAN Hongzhe, SUN Xinxin, DING Caifeng. A ratio-based fluorescent nanoprobe for miRNA-155 detection[J]. Journal of Qingdao University of Science and Technology(Natural Science Edition),2026,47(5):29-37.
A Ratio-Based Fluorescent Nanoprobe for miRNA-155 Detection
YAN Hongzhe,SUN Xinxin,DING Caifeng (College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)
Abstract:In order to achieve the ratio-based detection and imaging research of the tumor marker miRNA-155, a ratio-based fluorescent nanoprobe FAM/Cy3@EuP composed of multiple units is designed, and a metal organic backbone Eu-MOFs is synthesised by hydrothermal method. To achieve ratio-based detection and improve the sensitivity and accuracy of miRNA-155 detection, Cy3 was labeled on the DNA. After connecting Cy3-DAN onto the Eu-MOFS surface, fluorescence resonance energy transfer (FRET) occurred between Cy3 and FAM. Then,miRNA-155 induces dissociation of Cy3-DNA from the Eu-MOF surface, disrupting FRET and decreasing red fluorescence signal while increasing green fluorescence signal, enabling ratio-based fluorescence detection. The FAM/Cy3@EuP exhibits good optical properties, intracellular stability and low cytotoxicity, allowing for Intracellular detection and imaging studies. The simple self-assembly process and the rapid and sensitive detection with the target are of great importance for the clinical detection of tumor markers and have a broad application prospect.
Key words:ratio-based fluorescent nanoprobe; FRET; miRNA-155; cell imaging
收稿日期:2025-10-12
基金项目:山东省自然科学基金项目(ZR2020MB065).
作者简介:严鸿哲(1999—),男,硕士研究生 . * 通信联系人