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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.
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.
The...

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Immunogold labelling in environmental scanning electron microscopy: applicative features for complementary

G Cafiero1, F Papale, A Grimaldi

  • 1IX Division of General Surgery and Applied Biotechnology, Department of Anaesthesological, Surgical and Emergency Sciences, Second University of Naples, Piazza Miraglia 1, Naples, Italy.

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|December 2, 2010
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Summary

Environmental scanning electron microscopy (ESEM) combined with immunogold labelling (IGL) and Thin Prep technology enables detailed analysis of cell morphology and surface proteins in fine needle aspirations. This powerful diagnostic tool aids pre-surgical evaluation.

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Area of Science:

  • Electron Microscopy
  • Cell Biology
  • Diagnostic Pathology

Background:

  • Fine needle aspiration (FNA) is crucial for diagnosing thyroid nodules.
  • Current methods for analyzing FNA samples have limitations in visualizing both cell morphology and surface proteins simultaneously.
  • Environmental scanning electron microscopy (ESEM) offers advantages for biological sample analysis due to its less stringent vacuum requirements.

Purpose of the Study:

  • To combine ESEM with immunogold labelling (IGL) and Thin Prep technology for analyzing human FNA samples.
  • To evaluate the preservation of cell morphology and the clarity of surface protein detection using this combined technique.
  • To assess the potential of ESEM-IGL as a diagnostic tool for pre-surgical evaluation.

Main Methods:

  • Human FNA samples from thyroid nodules were processed using Thin Prep technology to create uniform cell monolayers.
  • Samples were analyzed using environmental scanning electron microscopy (ESEM) combined with immunogold labelling (IGL).
  • Optimization of ESEM conditions (vacuum pressure, temperature, humidity) was performed.

Main Results:

  • The combined ESEM-IGL and Thin Prep method successfully preserved cell morphology in FNA samples.
  • Clear immunogold labelling of cell surface proteins was achieved.
  • ESEM provided morphological and compositional information, enhancing diagnostic potential.

Conclusions:

  • The combination of ESEM-IGL and Thin Prep technology is a viable method for analyzing cell morphology and surface proteins in FNA samples.
  • This technique offers a powerful new diagnostic tool for pre-surgical evaluation of thyroid nodules.
  • ESEM-IGL opens new applications for electron microscopy in cytopathology.