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Related Experiment Videos

Ultrastructural changes in the liver in heatstroke.

M C Kew, O T Minick, R M Bahu

    The American Journal of Pathology
    |March 1, 1978
    PubMed
    Summary

    Heatstroke causes significant liver cell damage, particularly affecting cell membranes and structures near blood vessels. High temperatures are a primary cause, but other factors like low oxygen also contribute to liver injury.

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    Area of Science:

    • Hepatology
    • Pathology
    • Cell Biology

    Background:

    • Heatstroke is a severe condition with significant morbidity and mortality.
    • Understanding the cellular mechanisms of heatstroke-induced organ damage is crucial for developing effective treatments.

    Purpose of the Study:

    • To describe the ultrastructural changes in human liver tissue following heatstroke.
    • To identify the primary cellular targets of hepatic injury in heatstroke.

    Main Methods:

    • Human liver tissue samples were analyzed 24 to 96 hours post-heatstroke.
    • Transmission electron microscopy was used to examine ultrastructural alterations in hepatocytes and sinusoidal lining cells.

    Main Results:

    • Significant changes were observed at the vascular pole of hepatocytes, including cell membrane damage and microvilli alterations.
    • Sinusoidal lining cells showed degenerative changes, and basement membrane-like material appeared.
    • Intravascular elements and debris were found within hepatocytes and sinusoids, respectively.
    • Hepatocellular changes included endoplasmic reticulum vesiculation, ribosome detachment, and mitochondrial alterations.
    • Evidence of intravascular coagulation and hemolysis was frequently observed.

    Conclusions:

    • Hepatocyte and sinusoidal lining cell membranes are primary targets of heatstroke-induced liver injury.
    • Elevated tissue temperature is a major contributor to hepatic changes, alongside complicating factors like hypoxia and disseminated intravascular coagulation.

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