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Related Experiment Videos

Hepatocyte perfusion within a centrifuge.

B Eiseman, L Norton, N C Kralios

    Surgery, Gynecology & Obstetrics
    |January 1, 1976
    PubMed
    Summary

    A modified centrifuge effectively functions as a perfusion chamber for hepatocytes, supporting liver functions for up to 12 hours. This system shows promise for developing extracorporeal liver support technologies.

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    Area of Science:

    • Biomedical Engineering
    • Hepatology
    • Bioreactor Design

    Background:

    • Extracorporeal liver support aims to bridge patients awaiting transplantation or recovery.
    • Hepatocyte viability and function are critical for effective liver support systems.
    • Existing perfusion systems face challenges in maintaining adequate oxygenation and cell function.

    Purpose of the Study:

    • To evaluate a standard blood bank centrifuge as a perfusion chamber for hepatocyte suspensions.
    • To assess the suitability of this system for potential extracorporeal liver support applications.
    • To determine optimal perfusion conditions and viability metrics for hepatocytes in this setup.

    Main Methods:

    • Utilized a standard centrifuge as a perfusion chamber for hepatocyte suspensions.
    • Employed cell-free, oxygenated plasma, serum, or tissue culture medium as perfusate (pO2 300 mmHg).
    • Compared intermittent versus continuous flow perfusion, assessing hepatocyte function via pyruvate metabolism to 14CO2.

    Main Results:

    • Continuous flow perfusion at 800 mL/min supported most hepatocyte functions for 6 hours and some for 12 hours.
    • Intermittent perfusion was insufficient for prolonged hepatocyte viability due to inadequate oxygen delivery.
    • Metabolism of 2-14C pyruvate to 14CO2 proved a sensitive indicator of liver function in the system.

    Conclusions:

    • A centrifuge adapted for continuous perfusion of oxygenated plasma is a viable platform for extracorporeal liver support.
    • Centrifugal force effectively retains hepatocytes within the chamber, simplifying bioreactor design.
    • This approach offers a promising foundation for developing advanced artificial liver support devices.

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