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Enhanced SARS-CoV-2 Neutralization by Secretory IgA in vitro
Zijun Wang1, Julio C C Lorenzi1, Frauke Muecksch2
1Laboratory of Molecular Immunology, The Rockefeller University, New York, NY, USA.
Biorxiv : the Preprint Server for Biology
|September 16, 2020
Summary
Secretory immunoglobulin A (IgA) antibodies, particularly IgA dimers found in the nasopharynx, show potent neutralizing activity against SARS-CoV-2, suggesting their importance for mucosal immunity and vaccine efficacy.
Area of Science:
- Immunology
- Virology
- Mucosal Immunity
Background:
- SARS-CoV-2 infection targets mucosal surfaces.
- Serum antibody responses, like IgG, vary and are often low in mild COVID-19 cases.
- The role of secretory antibodies, such as IgA, in controlling initial viral spread and transmissibility is not well understood.
Conclusions:
- Secretory IgA, especially in dimeric form, may play a crucial role in combating SARS-CoV-2 at mucosal sites.
- IgA responses are a significant factor in controlling viral spread and transmissibility.
- Secretory IgA responses could be vital for enhancing protection against SARS-CoV-2 and improving vaccine efficacy.
