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Related Experiment Videos

Hepatic macrophage complement receptor clearance function following injury.

B G Cuddy, D J Loegering, F A Blumenstock

    The Journal of Surgical Research
    |March 1, 1986
    PubMed
    Summary
    This summary is machine-generated.

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    Depressed hepatic macrophage complement receptor function, which clears EIgM-coated cells, is linked to various host defense impairments, including trauma and bacteremia, but not arterial cannulation.

    Area of Science:

    • Immunology
    • Sepsis Research
    • Surgical Complications

    Background:

    • Hepatic macrophage complement receptor clearance function is known to be impaired after thermal injury.
    • The role of this function in other conditions of compromised host defense is not well understood.

    Purpose of the Study:

    • To investigate whether impaired hepatic complement receptor function is associated with various experimental conditions that depress host defense.
    • To determine the specific mechanisms behind this impairment.

    Main Methods:

    • Hepatic uptake of IgM-coated erythrocytes (EIgM) was measured in rats following interventions such as thermal injury, hemorrhagic shock, trauma, bacteremia, and endotoxemia.
    • Hepatic blood flow and complement levels were assessed to rule out alternative causes for altered clearance.

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    Main Results:

    • Hepatic EIgM uptake was significantly depressed following most interventions, including trauma, shock, thermal injury, bacteremia, and endotoxemia.
    • This depression in clearance function was not attributable to reduced hepatic blood flow or complement depletion.
    • Arterial cannulation did not result in a depression of hepatic complement receptor function.

    Conclusions:

    • Impairment of hepatic macrophage complement receptor clearance function is a common feature across multiple conditions that compromise host defense.
    • This dysfunction represents a significant aspect of depressed host defense mechanisms in various physiological and pathological states.