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Interface-constrained catalytic hairpin assembly permits highly sensitive SERS signaling of miRNA.

Authors :
You, Yuanqi
Ren, Yu
Li, Yujun
Xu, Jianguo
Li, Zhi
Song, Shuai
Xia, Jinxing
Shen, Chenlin
Wang, Jie
Source :
Microchimica Acta. Jun2024, Vol. 191 Issue 6, p1-13. 13p.
Publication Year :
2024

Abstract

The rapid and precise monitoring of peripheral blood miRNA levels holds paramount importance for disease diagnosis and treatment monitoring. In this study, we propose an innovative research strategy that combines the catalytic hairpin assembly reaction with SERS signal congregation and enhancement. This combination can significantly enhance the stability of SERS detection, enabling stable and efficient detection of miRNA. Specifically, our paper-based SERS detection platform incorporates a streptavidin-modified substrate, biotin-labeled catalytic hairpin assembly reaction probes, 4-ATP, and primer-co-modified gold nanoparticles. In the presence of miRNA, the 4-ATP and primer-co-modified gold nanoparticles can specifically recognize the miRNA and interact with the biotin-labeled CHA probes to initiate an interfacial catalytic hairpin assembly reaction. This enzyme-free high-efficiency catalytic process can accumulate a large amount of biotin on the gold nanoparticles, which then bind to the streptavidin on the substrate with the assistance of the driving liquid, forming red gold nanoparticle stripes. These provide a multitude of hotspots for SERS, enabling enhanced signal detection. This innovative design achieves a low detection limit of 3.47 fM while maintaining excellent stability and repeatability. This conceptually innovative detection platform offers new technological possibilities and solutions for clinical miRNA detection. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00263672
Volume :
191
Issue :
6
Database :
Academic Search Index
Journal :
Microchimica Acta
Publication Type :
Academic Journal
Accession number :
178027682
Full Text :
https://doi.org/10.1007/s00604-024-06405-1