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Immunoelectron Microscopy of Viral Antigens

Neetu M Gulati1, Udana Torian1, John R Gallagher1

  • 1National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland.

Current Protocols in Microbiology
|June 21, 2019
PubMed

Insights

Immunoelectron microscopy precisely identifies viral antigens and their locations in vaccines and viruses. This technique enhances understanding of viral structure for improved vaccine development.

Area of Science:

  • Molecular virology
  • Immunology
  • Microscopy

Background:

  • Traditional electron microscopy lacks specificity for identifying viral components.
  • Distinguishing between different antigens within complex viral samples can be challenging.
  • Understanding antigen localization is crucial for vaccine efficacy.

Purpose of the Study:

  • To describe methods for immunoelectron microscopy using immunogold labeling.
  • To demonstrate the application of these methods for analyzing viral antigens.
  • To highlight considerations for sample preparation and morphological analysis.

Main Methods:

  • Immunogold labeling of viral antigens in liquid suspension.
  • Transmission electron microscopy for visualization.
  • Qualitative analysis of particulate samples, including whole viruses and viral-like particles.

Main Results:

  • Successful visualization and localization of viral antigens, exemplified by influenza virus glycoproteins.
  • Demonstration of antigen positioning within viral structures.
  • Assessment of sample morphology relevant to antigen presentation.

Conclusions:

  • Immunoelectron microscopy provides definitive identification and localization of viral antigens.
  • This technique is valuable for analyzing the antigenic composition of viral vaccines and particles.
  • Enhanced understanding of viral antigenic makeup supports molecular virology and vaccine design.

Keywords:
antigen detectionimmunogold labelinginfluenza virustransmission electron microscopyvaccinesviral glycoproteinsviruses

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