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Prolonged complement activation in mice

I J Simpson, J Moran, D J Evans

    Kidney International
    |June 1, 1978
    PubMed
    Summary
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    Protracted activation of the alternative complement pathway using cobra venom factor did not cause direct kidney injury in B mice. Studies found no evidence of nephrotoxicity from prolonged complement system engagement.

    Area of Science:

    • Immunology
    • Nephrology

    Background:

    • Antibody responses to cobra venom factor (CVF) are T-dependent.
    • B mice lack resistance to CVF's effects, making them suitable for studying prolonged alternative complement pathway activation.

    Purpose of the Study:

    • To investigate potential renal injury from sustained activation of the alternative complement pathway.
    • To determine if prolonged complement system engagement via CVF has a directly nephrotoxic effect.

    Main Methods:

    • Utilized B mice lacking resistance to CVF.
    • Administered CVF for extended periods (up to three months).
    • Assessed renal function and injury through blood urea measurements, proteinuria analysis, and microscopy (light, immunofluorescence, electron).

    Main Results:

    Related Experiment Videos

    • No evidence of direct nephrotoxicity was observed.
    • Blood urea and proteinuria levels remained normal.
    • Microscopic examinations did not reveal complement-mediated renal damage.

    Conclusions:

    • Prolonged activation of the alternative complement pathway by CVF is not directly nephrotoxic.
    • The complement system's alternative pathway can be activated long-term without causing kidney damage.