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Neuroimmunological electron microscopy with microwave-accelerated fixation.

P J Armati1, J D Pollard, D Van Reyk

  • 1School of Biological Sciences, University of Sydney, NSW, Australia.

Journal of Immunological Methods
|June 13, 1988
PubMed
Summary
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Microwave treatment shortens glutaraldehyde fixation time, preserving immune complexes for immunoelectron microscopy. This method effectively demonstrates MHC class I antigen on Schwann cells using the peroxidase method.

Area of Science:

  • Immunoelectron microscopy
  • Cellular immunology
  • Histology

Background:

  • Immunoelectron microscopy is crucial for locating immune complexes.
  • Standard glutaraldehyde fixation destroys these complexes, limiting analysis.
  • Preserving antigen integrity during fixation is essential for accurate results.

Purpose of the Study:

  • To develop a method for preserving immune complexes during glutaraldehyde fixation.
  • To optimize fixation conditions for immunoelectron microscopy.
  • To effectively demonstrate MHC class I antigen on Schwann cells.

Main Methods:

  • Concomitant microwave treatment was used to shorten glutaraldehyde fixation periods.
  • A 1.25% glutaraldehyde concentration was employed.

Related Experiment Videos

  • The peroxidase method was utilized for antigen demonstration.

    • Main Results:

    • Microwave-assisted fixation significantly improved the preservation of immune complexes.
    • Ideal preservation and demonstration of MHC class I antigen on Schwann cells were achieved.
    • The optimized method allows for precise localization of antigens.

    Conclusions:

    • Microwave treatment is a valuable adjunct to glutaraldehyde fixation for immunoelectron microscopy.
    • This technique enhances the preservation of delicate immune complexes.
    • The method provides reliable demonstration of MHC class I antigen on Schwann cells.