Intramolecular enhanced entropy-driven DNA-Au nanodevice for mRNA imaging in living cells

IF 5.3 2区化学 Q1 CHEMISTRY, ANALYTICAL

Microchimica Acta Pub Date : 2025-03-17 DOI:10.1007/s00604-025-06997-2

Chao Guo, Tongnian Gu, Shao-Hua Wen, Yuan Dang, Yuanzhen Zhou, Junping Ma, Sha Yu

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Abstract

An intramolecular enhanced entropy-driven DNA amplifier-tethered gold nanoparticle (DNA-Au) nanodevice has been designed for highly sensitive in situ imaging of messenger ribonucleic acid (mRNA) in living cells. The DNA amplifier is immobilized on a same AuNP and the initial fluorescence of DNA-Au nanodevice is quenched. Upon internalized into the target cancer cells, the nanodevice can be activated by endogenous TK1 mRNA, and promptly release the fluorophore via the intramolecular enhanced DNA strand displacement reaction. The decreasing distance and increasing local concentration of the probes via intramolecular reaction can significantly improve the reaction kinetics of DNA-Au nanodevice, thus achieving the highly sensitive imaging of TK1 mRNA. The excellent sensitivity and selectivity allow the DNA-Au nanodevice to accurately discriminate different cell lines and monitor the variations in intracellular TK1 mRNA expression levels via fluorescence imaging. Therefore, the proposed intramolecular enhanced entropy-driven DNA-Au nanodevice will afford a reliable approach for accurate determination of mRNA in molecular diagnostic systems.

Graphical Abstract

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来源期刊

Microchimica Acta 化学-分析化学

CiteScore

9.80

自引率

5.30%

发文量

410

审稿时长

2.7 months

期刊介绍： As a peer-reviewed journal for analytical sciences and technologies on the micro- and nanoscale, Microchimica Acta has established itself as a premier forum for truly novel approaches in chemical and biochemical analysis. Coverage includes methods and devices that provide expedient solutions to the most contemporary demands in this area. Examples are point-of-care technologies, wearable (bio)sensors, in-vivo-monitoring, micro/nanomotors and materials based on synthetic biology as well as biomedical imaging and targeting.