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Defective reticuloendothelial system function in rheumatoid arthritis

B D Williams, B A Pussell, C M Lockwood

    Lancet (London, England)
    |June 23, 1979
    PubMed
    Summary
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    Patients with active rheumatoid arthritis (R.A.) show impaired splenic reticuloendothelial system function, correlating with increased immune complexes. Treatment normalizes this splenic function in inactive R.A.

    Area of Science:

    • Immunology
    • Rheumatology
    • Hematology

    Background:

    • Rheumatoid arthritis (R.A.) is a chronic inflammatory disease.
    • The reticuloendothelial system, particularly the spleen, plays a role in immune regulation.
    • Dysfunction in immune clearance mechanisms may contribute to R.A. pathogenesis.

    Purpose of the Study:

    • To assess the function of the splenic reticuloendothelial system in patients with rheumatoid arthritis.
    • To investigate the relationship between splenic function, disease activity, and circulating immune complexes in R.A.

    Main Methods:

    • Assessed splenic function by measuring the clearance rate of autologous heat-damaged erythrocytes.
    • Quantified circulating immune complexes using a Clq-binding assay.
    • Correlated splenic function with R.A. disease activity and treatment status.

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    Main Results:

    • 11 out of 13 patients with active R.A. exhibited defective erythrocyte clearance, indicating impaired splenic function.
    • A significant inverse correlation was observed between splenic function and levels of circulating immune complexes.
    • Splenic function was normal in patients with inactive R.A. undergoing treatment with gold or prednisone.

    Conclusions:

    • Splenic reticuloendothelial system dysfunction is present in active rheumatoid arthritis.
    • Impaired splenic clearance is associated with elevated circulating immune complexes in R.A.
    • Treatment for inactive R.A. appears to restore normal splenic function.