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Updated: Sep 23, 2025

A Rapid, Multiplex Dual Reporter IgG and IgM SARS-CoV-2 Neutralization Assay for a Multiplexed Bead-Based Flow Analysis System
Published on: April 6, 2021
Cytopathic Effect (CPE )-Based Drug Screening Assay for SARS-CoV-2
Yan Ling Ng1, Chee Keng Mok1,2, Justin Jang Hann Chu3,4,5,6
1Laboratory of Molecular RNA Virology and Antiviral Strategies, Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
Developing a rapid assay to screen for effective COVID-19 antivirals is crucial. This study presents a cytopathic effect-based method for quickly identifying promising drug candidates from compound libraries to combat the SARS-CoV-2 pandemic.
Area of Science:
- Virology
- Drug Discovery
- Microbiology
Background:
- The emergence of SARS-CoV-2 presented significant challenges in identifying effective treatments.
- Rapid identification of antiviral drugs is critical for managing the COVID-19 pandemic.
Purpose of the Study:
- To develop and describe a rapid cytopathic effect (CPE)-based drug screening assay for SARS-CoV-2.
- To enable quick assessment of compound libraries for potential antiviral drug candidates.
Main Methods:
- A cytopathic effect (CPE)-based assay was developed for SARS-CoV-2 screening.
- The assay allows for pre- or post-treatment drug screening procedures.
- Evaluation of drug efficacy was performed using light microscopy by comparing virus-induced CPE in treated versus control cells.
Main Results:
- The described assay allows for the rapid assessment of drug compound libraries against SARS-CoV-2.
- Potent drug candidates can be quickly identified through this method.
- The assay facilitates efficient identification for further downstream studies.
Conclusions:
- A novel and rapid CPE-based drug screening assay for SARS-CoV-2 has been established.
- This assay is a valuable tool for accelerating the discovery of effective antiviral treatments for COVID-19.
- The method aids in the prompt identification of promising drug candidates for further investigation.

