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Postembedding immunogold labeling for electron microscopy using "LR White" resin.

B G Timms

    The American Journal of Anatomy
    |February 1, 1986
    PubMed
    Summary
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    This study presents a straightforward postembedding immunogold immunocytochemistry method for LR White-embedded tissues. The technique preserves antigenicity and allows high-resolution immunolabeling for diverse proteins.

    Area of Science:

    • Immunocytochemistry
    • Electron Microscopy
    • Biochemistry

    Background:

    • Postembedding immunogold immunocytochemistry is crucial for high-resolution antigen localization in electron microscopy.
    • LR White resin is commonly used for embedding tissues, but antigenicity preservation can be challenging.

    Purpose of the Study:

    • To develop and validate a robust postembedding immunogold immunocytochemistry protocol for LR White-embedded tissues.
    • To optimize fixation and dehydration steps for maximal antigenicity and structural integrity.

    Main Methods:

    • Tissue fixation using paraformaldehyde-glutaraldehyde mixtures or low glutaraldehyde concentrations followed by partial dehydration.
    • Embedding in LR White resin.
    • Postembedding immunolabeling using purified monoclonal antibodies and colloidal gold conjugates.

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    Main Results:

    • Successful preservation of antigenicity for various proteins across different tissue types.
    • High-resolution immunolabeling achieved due to good structural preservation.
    • The method demonstrated versatility with minimal modifications for different applications.

    Conclusions:

    • The described method offers a straightforward and versatile approach for postembedding immunogold immunocytochemistry.
    • This technique enhances antigen detection and localization in LR White-embedded samples.
    • It holds significant potential for various immunocytochemical research applications.