Fluorescence polarization system for rapid COVID-19 diagnosis

Chang Yeol Lee, Ismail Degani, Jiyong Cheong, Jae Hyun Lee, Hyun Jung Choi, Jinwoo Cheon, Hakho Lee

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Prompt diagnosis, patient isolation, and contact tracing are key measures to contain the coronavirus disease 2019 (COVID-19). Molecular tests are the current gold standard for COVID-19 detection, but are carried out at central laboratories, delaying treatment and control decisions. Here we describe a portable assay system for rapid, onsite COVID-19 diagnosis. Termed CODA (CRISPR Optical Detection of Anisotropy), the method combined isothermal nucleic acid amplification, activation of CRISPR/Cas12a, and signal generation in a single assay, eliminating extra manual steps. Importantly, signal detection was based on the ratiometric measurement of fluorescent anisotropy, which allowed CODA to achieve a high signal-to-noise ratio. For point-of-care operation, we built a compact, standalone CODA device integrating optoelectronics, an embedded heater, and a microcontroller for data processing. The developed system completed SARS-CoV-2 RNA detection within 20 min of sample loading; the limit of detection reached 3 copy/μL. When applied to clinical samples (10 confirmed COVID-19 patients; 10 controls), the rapid CODA test accurately classified COVID-19 status, in concordance with gold-standard clinical diagnostics.

Original languageEnglish
Article number113049
JournalBiosensors and Bioelectronics
Volume178
DOIs
Publication statusPublished - 2021 Apr 15

Bibliographical note

Funding Information:
This work was supported in part by the the US National Institutes of Health ( R01CA229777 , R21DA049577 , U01CA233360 , R01CA239078 , R01CA237500 ); the US Department of Defense ( W81XWH1910199 , W81XWH1910194 ); MGH Scholar Fund; and the Korea Institute for Basic Science ( IBS-R026-D1 ).

Funding Information:
This work was supported in part by the the US National Institutes of Health (R01CA229777, R21DA049577, U01CA233360, R01CA239078, R01CA237500); the US Department of Defense (W81XWH1910199, W81XWH1910194); MGH Scholar Fund; and the Korea Institute for Basic Science (IBS-R026-D1).

Publisher Copyright:
© 2021 Elsevier B.V.

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Biophysics
  • Biomedical Engineering
  • Electrochemistry

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