A rapid diagnosis of SARS-CoV-2 using DNA hydrogel formation on microfluidic pores.

Autor: Kim HS; Department of Mechanical Engineering, Korea University, Seoul, 02841, Republic of Korea., Abbas N; Nano-Biofluignostic Research Center, Korea University, Seoul, 02841, Republic of Korea., Shin S; Department of Mechanical Engineering, Korea University, Seoul, 02841, Republic of Korea; Nano-Biofluignostic Research Center, Korea University, Seoul, 02841, Republic of Korea. Electronic address: lexerdshin@korea.ac.kr.
Jazyk: angličtina
Zdroj: Biosensors & bioelectronics [Biosens Bioelectron] 2021 Apr 01; Vol. 177, pp. 113005. Date of Electronic Publication: 2021 Jan 18.
DOI: 10.1016/j.bios.2021.113005
Abstrakt: The coronavirus disease 2019 (COVID-19) pandemic has been a major public health challenge in 2020. Early diagnosis of COVID-19 is the most effective method to control disease spread and prevent further mortality. As such, a high-precision and rapid yet economic assay method is urgently required. Herein, we propose an innovative method to detect severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) using isothermal amplification of nucleic acids on a mesh containing multiple microfluidic pores. Hybridization of pathogen DNA and immobilized probes forms a DNA hydrogel by rolling circle amplification and, consequently, blocks the pores to prevent fluid movement, as observed. Following optimization of several factors, including pore size, mesh location, and precision microfluidics, the limit of detection (LOD) for SARS-CoV-2 was determined to be 0.7 aM at 15-min incubation. These results indicate rapid, easy, and effective detection with a moderate-sized LOD of the target pathogen by remote point-of-care testing and without the requirement of any sophisticated device.
(Copyright © 2021 The Authors. Published by Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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