Cited by 763Influenza Virus Research StudiesMonoclonal and Polyclonal Antibodies ResearchSARS-CoV-2 and COVID-19 Research

Broadly neutralizing hemagglutinin stalk–specific antibodies require FcγR interactions for protection against influenza virus in vivo

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DiLillo, David J, Tan, Gene S, Palese, Peter, Ravetch, Jeffrey V·2014·Nature Medicine

Abstract

Neutralizing antibodies against influenza viruses have traditionally been thought to provide protection exclusively through their variable region; the contributions of mechanisms conferred by the Fc domain remain controversial. We investigated the in vivo contributions of Fc interactions with their cognate receptors for a collection of neutralizing anti-influenza antibodies. Whereas five broadly neutralizing monoclonal antibodies (bNAbs) targeting the conserved stalk region of hemagglutinin (HA) required interactions between the antibody Fc and Fc receptors for IgG (FcγRs) to confer protection from lethal H1N1 challenge, three strain-specific monoclonal Abs (mAbs) against the variable head domain of HA were equally protective in the presence or absence of FcγR interactions. Although all antibodies blocked infection, only anti-stalk bNAbs were capable of mediating cytotoxicity of infected cells, which accounts for their FcγR dependence. Immune complexes generated with anti-HA stalk mAb efficiently interacted with FcγRs, but anti-HA head immune complexes did not. These results suggest that FcγR binding capacity by anti-HA antibodies was dependent on the interaction of the cognate Fab with antigen. We exploited these disparate mechanisms of mAb-mediated protection to reengineer an anti-stalk bNAb to selectively enhance FcγR engagement to augment its protective activity. These findings reveal a previously uncharacterized property of bNAbs and guide an approach toward enhancing mAb-mediated antiviral therapeutics.

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  • T cells are important in the host response to SARS-CoV-2 by killing infected cells, helping B cells and antibody production, and possibly lowering the risk of vaccine-induced enhanced disease.

    “As expected for a viral infection, T cells are also important mediators in the host response to SARS-CoV-2 infection, by killing infected cells, supporting B cell function and antibody responses, and, possibly, reducing the risk of vaccine-induced enhanced disease39,40”
  • Non-neutralizing binding antibodies have shown protective effects in many viral infections.

    “Binding, non-neutralizing antibodies have also been shown to have a protective effect in many viral infections (Asthagiri Arunkumar et al., 2019; DiLillo et al., 2014; Saphire et al., 2018)”

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Authors
DiLillo, D. J., Tan, G. S., Palese, P., & Ravetch, J. V.
Affiliations
  • Rockefeller University (US)
  • Icahn School of Medicine at Mount Sinai (US)
Corresponding author
Ravetch, Jeffrey V
Venue
Nature Medicine
Published
2014-01-12
Volume
20
Issue
2
Pages
143-151
ISSN
  • 1078-8956 (ISSN-L)
  • 1546-170X
OpenAlex
W2161738112
Cited by
749
References
53
Citations by year
2026: 38 · 2025: 44 · 2024: 32 · 2023: 58 · 2022: 59 · 2021: 77 · 2020: 52 · 2019: 86 · 2018: 68 · 2017: 74 · 2016: 64 · 2015: 62 · 2014: 32 · 2013: 1 · 2012: 1
FWCI
54.50
Type
journal article
Language
en
Open access
Locations
  • Nature Medicine (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Bill and Melinda Gates Foundation
  • Leukemia and Lymphoma Society
  • National Institutes of Health
  • National Institute of Allergy and Infectious Diseases (U19AI109946, HHSN266200700010C, P01AI097092, R01AI035875, AI097092, P01AI081677, U54AI057158)
  • Army Research Office
  • Army Research Laboratory
Topics
  • Health Sciences › Medicine › Epidemiology › Influenza Virus Research Studies
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Monoclonal and Polyclonal Antibodies Research
  • Health Sciences › Medicine › Infectious Diseases › SARS-CoV-2 and COVID-19 Research
Keywords
influenza virus, hemagglutinin stalk, broadly neutralizing antibodies, Fc gamma receptor, antibody-dependent cellular cytotoxicity, antibody-mediated protection, immune complexes, H1N1 influenza, antibody engineering, neutralizing monoclonal antibodies
MeSH terms
Animals, Antibodies, Monoclonal, Antigen-Antibody Complex, Cell Line, Chick Embryo, Dogs, Enzyme-Linked Immunosorbent Assay, Humans, Killer Cells, Natural, Mice, Inbred C57BL, Neutralization Tests, Receptors, IgG, Mice, Knockout, Hemagglutinin Glycoproteins, Influenza Virus, Surface Plasmon Resonance, Mice, Influenza A Virus, H1N1 Subtype, Kaplan-Meier Estimate, Antibodies, Neutralizing

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