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Title: Accessible detection of SARS-CoV-2 through molecular nanostructures and automated microfluidics
Authors: Zhao, Haitao 
Zhang, Yan 
Chen, Yuan 
Ho, Nicholas RY 
Sundah, Noah R 
Natalia, Auginia 
Liu, Yu 
Miow, Qing Hao 
Wang, Yu 
Tambyah, Paul A 
Ong, Catherine WM 
Shao, Huilin
Keywords: Science & Technology
Life Sciences & Biomedicine
Physical Sciences
Biotechnology & Applied Microbiology
Chemistry, Analytical
Nanoscience & Nanotechnology
Science & Technology - Other Topics
Molecular nanostructures
Automated microfluidics
Nucleic acid detection
Electrochemical sensor
Issue Date: 15-Dec-2021
Citation: Zhao, Haitao, Zhang, Yan, Chen, Yuan, Ho, Nicholas RY, Sundah, Noah R, Natalia, Auginia, Liu, Yu, Miow, Qing Hao, Wang, Yu, Tambyah, Paul A, Ong, Catherine WM, Shao, Huilin (2021-12-15). Accessible detection of SARS-CoV-2 through molecular nanostructures and automated microfluidics. BIOSENSORS & BIOELECTRONICS 194. ScholarBank@NUS Repository.
Abstract: Accurate and accessible nucleic acid diagnostics is critical to reducing the spread of COVID-19 and resuming socioeconomic activities. Here, we present an integrated platform for the direct detection of SARS-CoV-2 RNA targets near patients. Termed electrochemical system integrating reconfigurable enzyme-DNA nanostructures (eSIREN), the technology leverages responsive molecular nanostructures and automated microfluidics to seamlessly transduce target-induced molecular activation into an enhanced electrochemical signal. Through responsive enzyme-DNA nanostructures, the technology establishes a molecular circuitry that directly recognizes specific RNA targets and catalytically enhances signaling; only upon target hybridization, the molecular nanostructures activate to liberate strong enzymatic activity and initiate cascading reactions. Through automated microfluidics, the system coordinates and interfaces the molecular circuitry with embedded electronics; its pressure actuation and liquid-guiding structures improve not only analytical performance but also automated implementation. The developed platform establishes a detection limit of 7 copies of RNA target per μl, operates against the complex biological background of native patient samples, and is completed in <20 min at room temperature. When clinically evaluated, the technology demonstrates accurate detection in extracted RNA samples and direct swab lysates to diagnose COVID-19 patients.
ISSN: 0956-5663
DOI: 10.1016/j.bios.2021.113629
Appears in Collections:Staff Publications

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