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Antibodies to a Conserved Influenza Head Interface Epitope Protect by an IgG Subtype-Dependent Mechanism

Journal Article · · Cell
 [1];  [2];  [1];  [3];  [4];  [4];  [4];  [3];  [2];  [1];  [5];  [5];  [6];  [6];  [6];  [4];  [7];  [5]
  1. Duke Univ., Durham, NC (United States)
  2. Boston Children’s Hospital, Harvard Medical School, Boston, MA (United States). Lab. of Molecular Medicine
  3. Ragon Inst. and Harvard Medical School, Cambridge, MA (United States)
  4. National Inst. of Infectious Diseases, Tokyo (Japan)
  5. Duke Univ., Durham, NC (United States). Duke Human Vaccine Inst.
  6. Boston Univ., MA (United States). School of Medicine
  7. Boston Children’s Hospital, Harvard Medical School, Boston, MA (United States). Lab. of Molecular Medicine; Howard Hughes Medical Inst., Boston, MA (United States)
Vaccines to generate durable humoral immunity against antigenically evolving pathogens such as the influenza virus must elicit antibodies that recognize conserved epitopes. Analysis of single memory B cells from immunized human donors has led us to characterize a previously unrecognized epitope of influenza hemagglutinin (HA) that is immunogenic in humans and conserved among influenza subtypes. Structures show that an unrelated antibody from a participant in an experimental infection protocol recognized the epitope as well. IgGs specific for this antigenic determinant do not block viral infection in vitro, but passive administration to mice affords robust IgG subtype-dependent protection against influenza infection. The epitope, occluded in the pre-fusion form of HA, is at the contact surface between HA head domains; reversible molecular “breathing” of the HA trimer can expose the interface to antibody and B cells. Lastly, antigens that present this broadly immunogenic HA epitope may be good candidates for inclusion in “universal” flu vaccines.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
National Institutes of Health (NIH). National Institute of General Medical Sciences (NIGMS); USDOE Office of Science (SC)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1524669
Journal Information:
Cell, Journal Name: Cell Journal Issue: 5 Vol. 177; ISSN 0092-8674
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
ENGLISH

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Cited By (8)

“Breathing” Hemagglutinin Reveals Cryptic Epitopes for Universal Influenza Vaccine Design journal May 2019
Exposure of an occluded hemagglutinin epitope drives selection of a class of cross-protective influenza antibodies journal August 2019
Antibodies to Cryptic Epitopes in Distant Homologues Underpin a Mechanism of Heterologous Immunity between Plasmodium vivax PvDBP and Plasmodium falciparum VAR2CSA journal October 2019
M2e-based universal influenza vaccines: a historical overview and new approaches to development journal October 2019
Influenza and Antibody-Dependent Cellular Cytotoxicity journal June 2019
Recombinant Influenza Vaccines: Saviors to Overcome Immunodominance journal January 2020
The Case for Exploiting Cross-Species Epitopes in Malaria Vaccine Design journal February 2020
Minding the gap: The impact of B‐cell tolerance on the microbial antibody repertoire journal September 2019

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