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A monoclonal antibody against staphylococcal enterotoxin B superantigen inhibits SARS-CoV-2 entry in vitro
Mary Hongying Cheng; Rebecca A. Porritt; Magali Noval Rivas; James Krieger; Asli Beyza Ozdemir; Gustavo Garcia Jr.; Vaithilingaraja Arumugaswami; Bettina C. Fries; Moshe Arditi; Ivet Bahar.
Afiliación
  • Mary Hongying Cheng; University of Pittsburgh
  • Rebecca A. Porritt; Cedars-Sinai Medical Center
  • Magali Noval Rivas; Cedars-Sinai Medical Center
  • James Krieger; University of Pittsburgh
  • Asli Beyza Ozdemir; Cedars-Sinai Medical Center
  • Gustavo Garcia Jr.; University of California, Los Angeles
  • Vaithilingaraja Arumugaswami; University of California, Los Angeles
  • Bettina C. Fries; Stony Brook University Hospital
  • Moshe Arditi; Cedars-Sinai Medical Center
  • Ivet Bahar; University of Pittsburgh
Preprint en En | PREPRINT-BIORXIV | ID: ppbiorxiv-395079
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ABSTRACT
We recently discovered a superantigen-like motif, similar to Staphylococcal enterotoxin B (SEB), near the S1/S2 cleavage site of SARS-CoV-2 Spike protein, which might explain the multisystem-inflammatory syndrome (MIS-C) observed in children and cytokine storm in severe COVID-19 patients. We show here that an anti-SEB monoclonal antibody (mAb), 6D3, can bind this viral motif, and in particular its PRRA insert, to inhibit infection by blocking the access of host cell proteases, TMPRSS2 or furin, to the cleavage site. The high affinity of 6D3 for the furin-cleavage site originates from a poly-acidic segment at its heavy chain CDR2, a feature shared with SARS-CoV-2-neutralizing mAb 4A8. The affinity of 6D3 and 4A8 for this site points to their potential utility as therapeutics for treating COVID-19, MIS-C, or common cold caused by human coronaviruses (HCoVs) that possess a furin-like cleavage site.
Licencia
cc_by_nc_nd
Texto completo: 1 Colección: 09-preprints Base de datos: PREPRINT-BIORXIV Idioma: En Año: 2020 Tipo del documento: Preprint
Texto completo: 1 Colección: 09-preprints Base de datos: PREPRINT-BIORXIV Idioma: En Año: 2020 Tipo del documento: Preprint