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Endothelial cell changes in acute hepatitis. A light and electron microscopic study.

K A Bardadin, P J Scheuer

    The Journal of Pathology
    |November 1, 1984
    PubMed
    Summary
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    Activated hepatic endothelial cells, identified by specific granules, were prominent in acute hepatitis. These cells may help protect liver cells from damage.

    Area of Science:

    • Hepatology
    • Cell Biology
    • Pathology

    Background:

    • Acute hepatitis, caused by viruses or drugs, affects hepatic endothelial cells.
    • Activated endothelial cells exhibit unique morphological and staining characteristics.
    • These cells are observed in various forms of acute hepatitis, particularly in necrotic areas.

    Purpose of the Study:

    • To investigate the characteristics of hepatic endothelial cells in acute hepatitis.
    • To determine the role of activated endothelial cells in liver injury.

    Main Methods:

    • Light and electron microscopy were used to examine liver biopsies from 48 patients with acute hepatitis.
    • Specific staining methods (amylase PAS, Perls' method) were employed.
    • Morphological analysis of endothelial cells and intracytoplasmic granules was performed.

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    Main Results:

    • Swollen hepatic endothelial cells with dense, refractile intracytoplasmic granules were observed.
    • These granules stained positive for PAS and iron, indicating siderosomes.
    • Activated endothelial cells were prevalent in necrotic areas and lined newly formed capillaries.
    • Basement membrane material was present on activated cells in areas of capillarization.

    Conclusions:

    • Activated hepatic endothelial cells, characterized by siderosomes, are a feature of acute hepatitis.
    • These cells are associated with liver necrosis and capillarization.
    • Activated endothelial cells might play a protective role for hepatocytes during acute liver injury.