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Related Experiment Videos

Lysosomal involvement in beryllium phosphate toxicity

D Dinsdale

    British Journal of Experimental Pathology
    |February 1, 1982
    PubMed
    Summary

    Intravenously administered beryllium phosphate particles are rapidly endocytosed by rat liver Kupffer cells. These cells undergo lysosomal swelling and rupture, leading to cell death and beryllium release.

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    Area of Science:

    • Toxicology
    • Cell Biology
    • Hepatology

    Background:

    • Beryllium compounds are known toxicants.
    • Understanding the cellular fate of inhaled or injected beryllium is crucial for risk assessment.

    Purpose of the Study:

    • To investigate the cellular uptake and intracellular fate of beryllium phosphate particles in rat liver.

    Main Methods:

    • Intravenous administration of beryllium phosphate particles to rats.
    • Liver tissue analysis using transmission electron microscopy.

    Main Results:

    • Beryllium phosphate particles were rapidly endocytosed by Kupffer cells within 15 minutes.
    • Particles were degraded in secondary lysosomes, causing significant lysosomal swelling and cell distension.
    • Vacuolation and cell death were observed exclusively in Kupffer cells, particularly in the pericanalicular region.
    • Lysosomal rupture led to the release of beryllium within Kupffer cells.

    Conclusions:

    • Kupffer cells are the primary target for beryllium phosphate particles in the liver.
    • The observed lysosomal pathology in Kupffer cells is a key mechanism of beryllium-induced hepatotoxicity.

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