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A Simplified SARS-CoV-2 Pseudovirus Neutralization Assay.

Gaetano Donofrio1, Valentina Franceschi1, Francesca Macchi1

  • 1Department of Medical-Veterinary Science, University of Parma, 43126 Parma, Italy.

Vaccines
|April 30, 2021
PubMed
Summary

A simplified SARS-CoV-2 pseudovirus neutralization assay was developed to quantify neutralizing antibodies from COVID-19 vaccination. This accessible method supports global pandemic control by validating vaccine efficacy.

Keywords:
COVID-19SARS-CoV-2neutralization assayneutralizing antibodypseudovirus

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Area of Science:

  • Virology
  • Immunology
  • Vaccinology

Background:

  • The COVID-19 pandemic necessitates effective strategies for eradication and spread control.
  • Validating vaccine efficacy requires quantifying neutralizing antibodies, which correlate with protection against SARS-CoV-2.

Purpose of the Study:

  • To develop a simplified, accurate, and accessible SARS-CoV-2 pseudovirus neutralization assay.
  • To support COVID-19 vaccination campaigns by providing a reliable method for assessing neutralizing antibody induction.

Main Methods:

  • A replication-incompetent lentivirus system expressing the SARS-CoV-2 S protein was utilized.
  • A cell line stably expressing human ACE2 and TMPRSS2 receptors was employed.
  • The assay protocol was minimized for ease of use without compromising accuracy.

Main Results:

  • A simplified SARS-CoV-2 pseudovirus neutralization assay was successfully established.
  • The assay maintains sensitivity and quantitative reliability comparable to classical methods.
  • The system is adaptable to emerging coronavirus variants by modifying the pseudotyping vector.

Conclusions:

  • The developed assay offers an easy and accessible approach for medical laboratories to evaluate COVID-19 vaccine-induced neutralizing antibodies.
  • This tool can significantly aid in monitoring vaccination campaign effectiveness and controlling the pandemic.
  • The assay's adaptability ensures its utility against future SARS-CoV-2 variants.