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A New Auto-RPA-Fluorescence Detection Platform for SARS-CoV-2
Jing Tian1, Biao Chen2, Bin Zhang3
1Centers for Disease Control and Prevention, People's Liberation Army Southern Theater Command, Guangzhou, China.
Objective:
The outbreak of COVID-19 caused by SARS-CoV-2 has led to a serious worldwide pandemic. Quantitative reverse transcription-polymerase chain reaction (qRT-PCR)-based methods were recommended for routine detection of SARS-CoV-2 RNA. Because the reaction time and analytical sensitivity of qRT-PCR limits the diagnosis of SARS-CoV-2, development of a quick process of SARS-CoV-2 detection technology with high analytical sensitivity remains urgent.
Methods:
We combined isothermal amplification and fluorescence detection technology to develop a new auto-recombinase polymerase amplification (RPA)-fluorescence platform that could be used in the diagnosis of SARS-CoV-2.
Results:
By optimization of primers and probes, the RPA platform could detect SARS-CoV-2 nucleotides within 15 min. The limits of detection and specificity of the auto-RPA-fluorescence platform were 5 copies/µL and 100%, respectively. The accuracy of detection of the auto-RPA-fluorescence platform in the 16 positive samples was 100%.
Conclusion:
The RPA platform is a potential technology for the diagnosis of SARS-CoV-2 infection.
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