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Related Experiment Videos

Circulating immune complexes in steroid-responsive nephrotic syndrome.

R J Levinsky, P N Malleson, T M Barratt

    The New England Journal of Medicine
    |January 19, 1978
    PubMed
    Summary

    Immune complexes, specifically IgG complexes, are elevated in children with nephrotic syndrome during relapse. These complexes may play a role in the disease, though their exact mechanism remains unclear.

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    Area of Science:

    • Pediatric Nephrology
    • Immunology

    Background:

    • Steroid-responsive nephrotic syndrome (SRNS) is a common kidney disease in children.
    • The role of immune complexes in SRNS pathogenesis is not fully understood.

    Purpose of the Study:

    • To investigate the presence and characteristics of circulating soluble immune complexes in children with SRNS.
    • To determine if immune complexes correlate with disease activity.

    Main Methods:

    • Serum samples from 39 children with SRNS were analyzed for IgG immune complexes.
    • Levels were compared between children in relapse, remission, and healthy controls.
    • Complex size and C1q binding were assessed in a subset of patients.

    Main Results:

    • Elevated IgG immune complex levels were found in 17 of 18 children with SRNS in relapse (P < 0.001).

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  • Levels were significantly higher in relapsed patients compared to controls and those in remission (P < 0.001).
  • Complexes in SRNS did not bind C1q and differed in size from those in systemic lupus erythematosus.

    • Conclusions:

    • Circulating IgG immune complexes are significantly elevated during relapse in children with SRNS.
    • These findings suggest a potential pathogenic role for immune complexes in SRNS.
    • The precise mechanism linking these complexes to proteinuria requires further investigation.