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Gold nephropathy.

D J Davies, J Dowling, J M Xipell

    Pathology
    |October 1, 1977
    PubMed
    Summary
    This summary is machine-generated.

    Gold therapy for rheumatoid arthritis can cause kidney damage (nephropathy) due to immune reactions. Electron microscopy revealed characteristic changes in three patients, including immune deposits and gold inclusions in kidney tubules.

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    Area of Science:

    • Nephrology
    • Rheumatology
    • Immunology

    Background:

    • Gold therapy is used for rheumatoid arthritis.
    • Nephropathy with proteinuria is a known complication of gold therapy.
    • This complication is thought to result from an immune hypersensitivity reaction.

    Purpose of the Study:

    • To describe the structural changes in gold nephropathy.
    • To investigate the role of immune complexes and gold deposits in the kidneys.

    Main Methods:

    • Renal biopsies were performed on three patients with gold nephropathy.
    • Electron microscopy was used to examine the structural changes.
    • Immunofluorescence was used in one case to identify immune deposits.

    Main Results:

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    • Electron microscopy showed early membranous glomerular nephropathy with sub-epithelial immune complex deposits.
    • Immunofluorescence confirmed IgG and complement in the immune deposits.
    • Intracytoplasmic gold inclusions were observed in proximal tubules, best seen with unstained electron microscopy.

    Conclusions:

    • The study demonstrates characteristic structural changes in gold nephropathy.
    • Immune complex deposition and gold accumulation in tubules are key features.
    • Electron microscopy is crucial for diagnosing gold nephropathy.