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[Familial nephropathy in cocker spaniels].

J P Koeman, J W Ezilius, W J Biewenga

    DTW. Deutsche Tierarztliche Wochenschrift
    |April 1, 1989
    PubMed
    Summary

    This study found that familial nephropathy in Cocker Spaniels is not due to a low number of nephrons but a primary glomerulopathy. This kidney disease causes significant proteinuria and renal insufficiency in affected dogs.

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    Area of Science:

    • Veterinary Pathology
    • Renal Histology
    • Canine Nephrology

    Context:

    • Assessing nephron count is crucial for understanding kidney function and disease.
    • Histological and maceration methods offer different approaches to quantifying nephrons.
    • Cocker Spaniels are susceptible to familial nephropathy, necessitating research into its pathogenesis.

    Purpose:

    • To compare paraffin sectioning and maceration methods for calculating nephron number in canine kidneys.
    • To investigate the number of glomeruli in Cocker Spaniels with familial nephropathy.
    • To determine the underlying cause of familial nephropathy in Cocker Spaniels.

    Summary:

    • Both histological and maceration methods yielded comparable glomeruli counts (approx. 500-515 x 1000 per kidney) in normal dogs.
    • Nephropathic Cocker Spaniels showed a glomerular count not significantly lower than healthy controls, suggesting hypoplasia is not the cause.
    • Pathological findings revealed membranoproliferative-sclerosing glomerulonephritis leading to glomerular obsolescence, proteinuria, and renal insufficiency.

    Impact:

    • The study refutes cortical hypoplasia as the cause of familial nephropathy in Cocker Spaniels.
    • It establishes a primary glomerulopathy as the likely pathogenesis of this breed-specific kidney disease.
    • Findings aid in understanding and potentially managing canine kidney disease, improving diagnostic accuracy.

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