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Related Concept Videos

Immune Response Against Viral Pathogens01:29

Immune Response Against Viral Pathogens

The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
Cross-reactivity00:42

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Related Experiment Video

Updated: May 22, 2026

Detection of Neutralization-sensitive Epitopes in Antigens Displayed on Virus-Like Particle (VLP)-Based Vaccines Using a Capture Assay
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Structural basis for differential neutralization of ebolaviruses.

Shridhar Bale1, Joao M Dias, Marnie L Fusco

  • 1Dept. of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA 92037, USA.

Viruses
|May 17, 2012
PubMed
Summary

Antibody effectiveness against ebolaviruses is complex. Lower affinity antibodies can neutralize better than higher affinity ones, depending on epitope access and viral glycoprotein structure.

Keywords:
EbolaFilovirusSudan virusantibodiesebolavirusneutralization: glycoproteinstructure

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Area of Science:

  • Virology
  • Immunology
  • Structural Biology

Background:

  • Five ebolaviruses cause hemorrhagic fever; neutralization relies on antibodies targeting the surface glycoprotein (GP₁,₂).
  • Existing neutralizing antibodies show variable in vitro and in vivo efficacy, complicating therapeutic development.

Purpose of the Study:

  • To investigate factors influencing neutralizing and protective antibody responses against ebolaviruses.
  • To elucidate the structural basis of neutralization by characterizing the Sudan virus GP₁,₂-antibody complex.

Main Methods:

  • Comparative analysis of antibody affinity, epitope access, and neutralization efficacy.
  • X-ray crystallography to determine the structure of Sudan virus GP₁,₂ complexed with the neutralizing antibody 16F6.

Main Results:

  • A lower affinity antibody with restricted epitope access demonstrated superior neutralization compared to a higher affinity antibody.
  • The crystal structure revealed details of the GP₁-GP₂ clamp and differential antibody interactions, highlighting structural variations between Sudan virus variants.

Conclusions:

  • Antibody neutralization susceptibility is influenced by subtle epitope differences and GP₁,₂ molecular characteristics.
  • Structural insights into the GP₁,₂-antibody complex provide a foundation for designing effective ebolavirus therapeutics.