1.Department of Environmental Health, School of Public Health, Shanxi Medical University, Taiyuan,030001;2.Institute of Disease Control and Prevention, PLA, Beijing 100071
This work was supported by grants from National Science and Technology Major Project of China(2018ZX10711001003002, 2015AA020929) and Beijing Nova Program (Z141107001814071)
Rapid point-of-care (POC) detection of influenza A virus is critical for timely and effective flu prevention and control. In this study, we developed a hybridization chain reaction (HCR)-based assay, through coupling HCR reaction with fluorescence quenching by graphene oxide (GO), for the rapid detection of influenza A virus. The target is detected as it triggers HCR, which results in the extension of short DNA chains, protecting the 6-carboxy-fluorescein amidite (FAM) group from GO quenching. The results demonstrate that it could specifically recognize target nucleic acid fragment of influenza A virus from other pathogen, and even from single-base mismatched oligonucleotides. A good linear correlation between fluorescence intensity and the target concentrations ranging from 10 to 40 nmol/L was achieved, with a detection limit of 5 nmol/L. Its detection performance was verified on nasopharyngeal swab samples, which is the first clinical application of HCR-based influenza assay. This HCR-based method shows many advantages including the enzyme-free amplification of nucleic acids, simple reaction system and convenient protocols, suggesting its availability for POC detection.
SUN Ming-Xuan, ZHAO Rong-Tao, LI Yang, KONG Wen, YANG Yi, GUO Xu-Dong, LIU Wan-Ying, SONG Hong-Bin, ZHANG Zhi-Hong, HAO Rong-Zhang. Hybridization Chain Reaction-based Assay for The Detection of Influenza A Virus[J]. Progress in Biochemistry and Biophysics,2018,45(6):644-652
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