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Related Concept Videos

Immunogold Electron Microscopy01:20

Immunogold Electron Microscopy

Immunoelectron microscopy utilizes immunogold labeling of endogenous proteins with specific antibodies to detect and localize these proteins in cells and tissues. The procedure provides insights into the distribution and quantification of protein under different stimulation conditions offering clues about their functions. Conjugating highly electron-dense gold particles with primary or secondary antibodies allow antigen detection on and within cells, with high resolution and specificity.
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The early pioneers of microscopy opened a window into the invisible world of microorganisms. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes that leveraged nonvisible light, such as fluorescence microscopy that uses an ultraviolet light source and electron microscopy that uses short-wavelength electron beams. These advances significantly improved magnification, image resolution, and contrast. By comparison, the...
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Immunofluorescence Microscopy01:12

Immunofluorescence Microscopy

A fluorescence microscope uses fluorescent chromophores called fluorochromes, which can absorb energy from a light source and then emit this energy as visible light. Fluorochromes include naturally fluorescent substances (such as chlorophylls) and fluorescent stains that are added to the specimen to create contrast. Dyes such as Texas red and FITC are examples of fluorochromes. Other examples include the nucleic acid dyes 4’,6’-diamidino-2-phenylindole (DAPI), and acridine orange.
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Nanogold Labeling of the Yeast Endosomal System for Ultrastructural Analyses
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Immunogold probes in electron microscopy.

J E Beesley1

  • 1Wellcome Research Laboratories, Beckenham, UK.

Methods in Molecular Biology (Clifton, N.J.)
|February 22, 2012
PubMed
Summary
This summary is machine-generated.

Electron microscopy and immunocytochemistry reveal cellular structures. Optimizing cell preparation for electron microscopy involves balancing ultrastructure preservation with antigenicity for accurate antibody detection.

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Area of Science:

  • Cell Biology
  • Microscopy Techniques
  • Immunocytochemistry

Background:

  • Electron microscopy (EM) enables high-resolution visualization of cellular ultrastructure and tissue organization.
  • Electron immunocytochemistry (EIC) combines EM with immunolabeling to localize specific antigens within cells at the ultrastructural level.
  • A key challenge in EIC is the chemical fixation required for EM, which can damage antigenicity and reduce antibody binding.

Purpose of the Study:

  • To explore the inherent conflict between optimal fixation for electron microscopy and antigen preservation for immunocytochemistry.
  • To understand the compromise necessary in cell preparation for electron microscopy when performing electron immunocytochemistry.

Main Methods:

  • Review of established protocols for electron microscopy fixation.
  • Analysis of the effects of common fixation procedures on antigenicity.
  • Comparison of different cell preparation techniques for electron immunocytochemistry.

Main Results:

  • Optimal fixation for preserving fine structural detail in EM often leads to significant antigen damage.
  • Antigenicity is compromised during the fixation process essential for ultrastructural preservation.
  • Cell preparation for EM requires a careful balance to maintain both cellular ultrastructure and antigenicity.

Conclusions:

  • Achieving high-resolution ultrastructural detail via EM can negatively impact antigen detection in EIC.
  • Effective EIC relies on a strategic compromise in sample preparation to retain sufficient antigenicity while preserving cellular ultrastructure.
  • Further research may focus on developing novel fixation methods that better preserve both ultrastructure and antigenicity.