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Related Experiment Videos

Spatial visualization of junctional complexes by backscattered electron imaging and silver staining.

F Thiébaut, J P Rigaut, J Reitan

    Ultrastructural Pathology
    |January 1, 1986
    PubMed
    Summary

    This study presents a novel method for observing junctional complexes in intact tissue blocks using scanning electron microscopy and silver staining. This technique allows for transparent visualization of these crucial cell structures without sectioning or dissociation.

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    Area of Science:

    • Cell Biology
    • Microscopy Techniques
    • Histology

    Background:

    • Junctional complexes are vital for tissue integrity and cell communication.
    • Observing these structures typically requires tissue sectioning or dissociation, which can introduce artifacts.
    • Existing imaging methods have limitations in visualizing junctional complexes within intact tissue blocks.

    Purpose of the Study:

    • To develop and present a new method for observing junctional complexes in intact tissue blocks.
    • To utilize backscattered electron imaging in scanning electron microscopy for this purpose.
    • To enable visualization of junctional complexes without tissue dissociation or sectioning.

    Main Methods:

    • A modified silver staining technique, originally for nucleolar organizer regions, was applied 'en bloc' after formalin or glutaraldehyde fixation.

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  • Backscattered electron imaging in scanning electron microscopy was employed.
  • The method was tested on liver, jejunum, and urinary bladder tissues.

    • Main Results:

    • The silver staining effectively revealed junctional complexes in the studied tissues.
    • Backscattered electron imaging allowed clear observation of these complexes on the surface of intact superficial cells.
    • The technique provided visualization 'by transparence' in non-dissociated and non-sectioned tissues.

    Conclusions:

    • This method offers a valuable approach for studying junctional complexes in their native tissue context.
    • It facilitates the observation of junctional complexes without the need for dissociation or sectioning, preserving tissue architecture.
    • The technique enhances the understanding of cell-cell interactions and tissue structure through improved imaging capabilities.