Issue 9, 2022

CRISPR/Cas12a-mediated electrochemiluminescence platform for environmental and human serum SARS-CoV-2 RNA monitoring using a self-enhanced ruthenium complex linked to zeolitic imidazole framework-8

Abstract

Since the emergence of coronavirus disease 2019 (COVID-19), this highly contagious disease has ravaged the world, cumulatively causing millions of deaths and huge economic losses. As the culprit of COVID-19, severe acute respiratory syndrome β-coronavirus 2 (SARS-CoV-2) is highly infectious and pathogenic, which has caused extreme panic worldwide. Early and rapid monitoring of SARS-CoV-2 has a significant role in suppressing the pandemic and reducing the virus's lethality. In our work, we prepared a self-enhanced ruthenium complex linked to zeolitic imidazole framework-8 (ZIF-8) and used it as an electrochemiluminescence (ECL) emitter. Additionally, a double-stranded specific nuclease (DSN)-assisted target RNA cycling with catalytic hairpin assembly (CHA) signal amplification technology was used to achieve the conversion of target RNA concentration to double-stranded DNA (dsDNA) output which significantly improved the detection sensitivity of target RNA under environmental conditions and in real human serum samples. In addition, we also combined the trans-cleavage property of CRISPR–Cas12a with the adsorption property of C3N4 on a ferrocene (Fc)-labeled DNA probe and obtained target RNA-dependent ECL signals. The reliable detection protocol achieved the transformation of SARS-CoV-2 RNA concentration to ECL responses, obtaining a limit of detection (LOD) of 0.67 fM with high specificity and reproducibility, which was of guiding significance for current detection methods of mutant SARS-CoV-2 and universal RNA.

Graphical abstract: CRISPR/Cas12a-mediated electrochemiluminescence platform for environmental and human serum SARS-CoV-2 RNA monitoring using a self-enhanced ruthenium complex linked to zeolitic imidazole framework-8

Supplementary files

Article information

Article type
Paper
Submitted
21 juin 2022
Accepted
12 juil. 2022
First published
16 juil. 2022

Environ. Sci.: Nano, 2022,9, 3417-3426

CRISPR/Cas12a-mediated electrochemiluminescence platform for environmental and human serum SARS-CoV-2 RNA monitoring using a self-enhanced ruthenium complex linked to zeolitic imidazole framework-8

F. Yang, W. Wang, M. Zhang, W. Tao, Y. Wang, J. Shi, Y. Ding, M. Xie, S. Zhang, Z. Fan and K. Zhang, Environ. Sci.: Nano, 2022, 9, 3417 DOI: 10.1039/D2EN00595F

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