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Lanthanum as an electron microscopic stain.

M Shaklai, M Tavassoli

    The Journal of Histochemistry and Cytochemistry : Official Journal of the Histochemistry Society
    |December 1, 1982
    PubMed
    Summary
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    Lanthanum, an electron-dense tracer, is versatile in electron microscopy for mapping cell structures and studying barrier permeability. Its ability to bind calcium sites enhances its utility as a stain and probe in histochemistry.

    Area of Science:

    • Electron Microscopy
    • Histochemistry
    • Cell Biology

    Background:

    • Lanthanum is an electron-dense trivalent cation with a high affinity for calcium binding sites.
    • Its properties make it suitable for various applications in electron microscopy.

    Purpose of the Study:

    • To review the diverse applications of lanthanum as an electron microscopic tracer.
    • To discuss the methodological considerations for its use.
    • To highlight its emerging role as a stain in histochemistry.

    Main Methods:

    • Review of existing literature on lanthanum's use in electron microscopy.
    • Analysis of lanthanum's binding characteristics to cellular components.
    • Evaluation of methodologies for different tracer applications.

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    Main Results:

    • Lanthanum effectively delineates extracellular spaces and intercellular junctions.
    • It serves as a calcium probe, permeability tracer, intracellular marker, and stain for glycoproteins.
    • Methodologies vary depending on the specific application.

    Conclusions:

    • Lanthanum is a valuable and multifaceted tool in electron microscopy.
    • Its recognition as a reactive stain, beyond a passive tracer, expands its utility in electron microscope histochemistry.