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Photochromic visual sensing chip for isothermal amplification detection of porcine transmissible gastroenteritis virus

文献类型： 外文期刊

作者： Yuan, Ruishuang 1 ; Ma, Hanyu 2 ; Hong, Honghong 2 ; Xiao, Liting 2 ; Li, Bin 3 ; Wang, Kun 1 ;

作者机构： 1.Jiangsu Univ, Sch Agr Engn, Zhenjiang 212013, Peoples R China

2.Jiangsu Univ, Sch Chem & Chem Engn, Zhenjiang 212013, Peoples R China

3.Jiangsu Acad Agr Sci, Inst Vet Med, Nanjing 210014, Peoples R China

关键词： Photochromic sensing chip; Loop-mediated isothermal amplification; Visual detection; Transmissible gastroenteritis virus

期刊名称：BIOSENSORS & BIOELECTRONICS （ 影响因子：12.6； 五年影响因子：10.8 ）

ISSN： 0956-5663

年卷期： 2024 年 246 卷

页码：

收录情况： SCI

摘要： The outbreak of transmissible gastroenteritis virus (TGEV) will cause huge economic losses to the whole pig industry. Hence, there is urgent need to develop a rapid and ultrasensitive method for detection of TGEV. As a nucleic acid detection technique, loop-mediated isothermal amplification (LAMP) can achieve quantitative detection of targeted nucleic acids with high sensitivity and selectivity. Nevertheless, the signal outputs of LAMP method must be acquired by complicated instruments. In this work, we firstly developed a LAMP photochromic sensing chip for porcine TGEV detection by combination of the photochromic sensing chip and nucleic acid amplification. The detection signal was based on color change of electrochromic material rather than electrical signal, and thus the detection signal can be obtained by visualization without relying on complicated instrument. The entire test was performed with small fluorinated indium tin oxide electrodes modified with zinc oxide (ZnO) (a photocatalytic material) and Prussian blue (PB) (an electrochromic material). When photoinduced electrons produced by ZnO were injected into PB under light, the PB was reduced to Prussian white. The higher the concentration of TGEV, the more double-stranded DNA was produced after amplification. The amplified product produced greater impedance, and fewer electron was transferred, which affect the corresponding color change of PB. The sensing chip also showed highly sensitive response to TGEV, with the minimum limit of detection was determined to be 2.5 fg/mu L. The sensing chip developed herein will provide a new avenue for DNA amplification detection by visualization.

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