Potent mouse monoclonal antibodies that block SARS-CoV-2 infection

Youjia Guo, Atsushi Kawaguchi, Masaru Takeshita, Takeshi Sekiya, Mikako Hirohama, Akio Yamashita, Haruhiko Siomi, Kensaku Murano

Research output: Contribution to journalReview articlepeer-review

Abstract

Coronavirus disease 2019 (COVID-19), caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has developed into a global pandemic since its first outbreak in the winter of 2019. An extensive investigation of SARS-CoV-2 is critical for disease control. Various recombinant monoclonal antibodies of human origin that neutralize SARS-CoV-2 infection have been isolated from convalescent patients and will be applied as therapies and prophylaxis. However, the need for dedicated monoclonal antibodies suitable for molecular pathology research is not fully addressed. Here, we produced six mouse anti-SARS-CoV-2 spike monoclonal antibodies that not only exhibit robust performance in immunoassays including western blotting, ELISA, immunofluorescence, and immunoprecipitation, but also demonstrate neutralizing activity against SARS-CoV-2 infection to VeroE6/TMPRSS2 cells. Due to their mouse origin, our monoclonal antibodies are compatible with the experimental immunoassay setups commonly used in basic molecular biology research laboratories, providing a useful tool for future research. Furthermore, in the hope of applying the antibodies of clinical setting, we determined the variable regions of the antibodies and used them to produce recombinant human/mouse chimeric antibodies.

Original languageEnglish
Article number100346
JournalJournal of Biological Chemistry
Volume296
DOIs
Publication statusPublished - 2021 Jan 1

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Cell Biology

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