New Search

Export article
Open Access

Flow cytometry multiplexed method for the detection of neutralizing human antibodies to the native SARS‐CoV‐2 spike protein

Lydia Horndler, Pilar Delgado, David Abia, Ivaylo Balabanov, Pedro Martínez‐Fleta, Georgina Cornish, Miguel A Llamas, , Francisco Sánchez‐Madrid, Manuel Fresno, ,
Published: 17 February 2021
 by  EMBO
EMBO Molecular Medicine , Volume 13; doi:10.15252/emmm.202013549

Abstract: A correct identification of seropositive individuals for the severe acute respiratory syndrome coronavirus‐2 (SARS‐CoV‐2) infection is of paramount relevance to assess the degree of protection of a human population to present and future outbreaks of the COVID‐19 pandemic. We describe here a sensitive and quantitative flow cytometry method using the cytometer‐friendly non‐adherent Jurkat T‐cell line that stably expresses the full‐length native spike “S” protein of SARS‐CoV‐2 and a truncated form of the human EGFR that serves a normalizing role. S protein and huEGFRt coding sequences are separated by a T2A self‐cleaving sequence, allowing to accurately quantify the presence of anti‐S immunoglobulins by calculating a score based on the ratio of fluorescence intensities obtained by double‐staining with the test sera and anti‐EGFR. The method allows to detect immune individuals regardless of the result of other serological tests or even repeated PCR monitoring. As examples of its use, we show that as much as 28% of the personnel working at the CBMSO in Madrid is already immune. Additionally, we show that anti‐S antibodies with protective neutralizing activity are long‐lasting and can be detected in sera 8 months after infection.
Keywords: method / Immunology / S protein / Methods & Resources / Microbiology, Virology & Host Pathogen Interaction / SARS‐CoV‐2 / flow cytometry / seropositivity

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

Share this article

Click here to see the statistics on "EMBO Molecular Medicine" .
References (17)
    Back to Top Top