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Related Experiment Videos

Sinusoidal cells in rats with portacaval shunt: a morphometric study

L Dubuisson, P Bioulac-Sage, C Bedin

    Journal of Submicroscopic Cytology
    |July 1, 1982
    PubMed
    Summary

    Portacaval shunt in rats caused liver atrophy but maintained sinusoidal cell numbers. Kupffer and Ito cells showed increased volume density, suggesting endotoxemia relates to shunting, not impaired reticuloendothelial system function.

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    Area of Science:

    • Hepatology
    • Cell Biology
    • Surgical Research

    Background:

    • Portacaval shunt alters blood flow and can lead to endotoxemia.
    • The impact of shunting on liver sinusoidal cells requires detailed investigation.
    • Reticuloendothelial system function is crucial for liver health.

    Purpose of the Study:

    • To investigate the ultrastructural and morphometric changes in liver sinusoidal cells after portacaval shunt in rats.
    • To correlate observed cellular changes with potential endotoxemia.
    • To assess the role of the reticuloendothelial system in post-shunt liver adaptation.

    Main Methods:

    • Portacaval shunt surgery and sham operation in rats.
    • Liver perfusion with glutaraldehyde for tissue fixation.

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  • Morphometric and ultrastructural analysis of liver parenchyma, focusing on sinusoidal cells (Kupffer, Ito) in periportal and centrolobular zones.

    • Main Results:

    • Liver atrophy was observed post-shunt.
    • Hepatocyte and Kupffer cell numbers per parenchymal unit remained comparable between shunted and sham rats.
    • Sinusoids were slightly enlarged, with increased Kupffer cell volume density and lysosomal-like structures.
    • Ito cell number and volume density showed a slight increase.

    Conclusions:

    • Sinusoidal cell ultrastructure remains largely normal two weeks post-shunt.
    • Increased Kupffer cell activity suggests a response to altered liver environment.
    • Endotoxemia following portal blood shunting may be more directly linked to the shunt itself than to a depressed reticuloendothelial system.