Chinese Journal of Applied Chemistry ›› 2024, Vol. 41 ›› Issue (1): 137-146.DOI: 10.19894/j.issn.1000-0518.230083

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A Near-Infrared-Driven Signal Amplification Fluorescence Biosensor Based on Upconversion Beacon Probe for microRNA Detection

Xue-Min ZHOU1, Shu-Zhen LYU2, Guo-Fang ZHANG1, Zhu-Mei CUI1(), Sai BI2()   

  1. 1.The Affiliated Hospital of Qingdao University,Qingdao 266061,China
    2.College of Chemistry and Chemical Engineering,Qingdao University,Qingdao 266071,China
  • Received:2023-03-31 Accepted:2023-05-31 Published:2024-01-01 Online:2024-01-30
  • Contact: Zhu-Mei CUI,Sai BI
  • About author:bisai11@126.com
    cuizhumei1966@126.com
  • Supported by:
    the Beijing Kanghua Foundation for the Development of Traditional Chinese and Western Medicine(KH-2021-LLZX-014);the National Natural Science Foundation of China(22076087);the Natural Science Fund for Distinguished Young Scholars of Shandong Province(ZR2020JQ08)

Abstract:

In this work, a near-infrared light (NIR)-driven fluorescence biosensor is proposed based on the upconversion beacon probe and catalytic hairpin reaction (CHA) for the detection of microRNA. The target microRNA-21 (miRNA-21) can trigger the CHA reaction between the DNA hairpin H1 modified on magnetic beads (MBs) and the DNA hairpin H2 modified on upconversion nanoparticles (UCNPs), resulting in the introduction of UCNPs on the surface of MBs accompanied by the cyclic signal amplification. Through magnetic separation, the UCNPs fixed on MBs are separated and generate upconversion luminescence (UCL) under the excitation of 808 nm NIR, which shows the advantages of good luminescence stability and negligible photodamage. In this biosensor, the linear range of miRNA-21 is 0.1 to 100 nmol/L with the detection limit of 11.3 pmol/L. In addition, this fluorescence biosensor achieves the detection of miRNA-21 in serum samples, showing good practicability.

Key words: Upconversion nanoparticles, Catalytic hairpin reaction, Fluorescence biosensor, MicroRNA, Near-infrared light

CLC Number: