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Experimental Bence Jones cast nephropathy

M N Koss, C L Pirani, E F Osserman

    Laboratory Investigation; a Journal of Technical Methods and Pathology
    |June 1, 1976
    PubMed
    Summary
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    High doses of lambda Bence Jones protein induced cast nephropathy in mice, mimicking human myeloma kidney. This study establishes a novel animal model for investigating Bence Jones protein-induced kidney disease.

    Area of Science:

    • Nephrology
    • Immunology
    • Pathology

    Background:

    • Bence Jones protein, a product of malignant plasma cells, is implicated in kidney damage.
    • The precise mechanisms of Bence Jones protein nephropathy remain incompletely understood.
    • Existing models do not fully recapitulate the human condition.

    Purpose of the Study:

    • To develop and characterize an experimental model of Bence Jones protein-induced nephropathy.
    • To investigate the pathological changes and inflammatory responses in the kidney following Bence Jones protein administration.
    • To establish a murine model that closely resembles human myeloma kidney.

    Main Methods:

    • Intraperitoneal injections of purified lambda Bence Jones protein (50-200 mg) into C3H mice.
    • Control groups received ovalbumin injections.

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  • Kidney tissues were analyzed using light and electron microscopy, and immunofluorescence.
  • Blood urea nitrogen levels were measured terminally.

    • Main Results:

    • Mice receiving 200 mg of lambda Bence Jones protein developed extensive renal tubular cast formation with crystalloid structures.
    • Casts contained lambda Bence Jones protein initially, followed by Tamm-Horsfall protein.
    • An inflammatory response with polymorphonuclear and mononuclear cells was observed, alongside tubular cell injury.
    • Elevated blood urea nitrogen indicated renal dysfunction.

    Conclusions:

    • A single high dose of lambda Bence Jones protein can induce significant kidney damage in mice.
    • This experimental model closely mimics the morphologic features of human myeloma kidney.
    • The model provides a valuable tool for studying the pathogenesis and potential treatments of Bence Jones protein nephropathy.