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Circulating immune complexes in active Behçet's disease

R C Gupta, J D O'Duffy, F C McDuffie

    Clinical and Experimental Immunology
    |November 1, 1978
    PubMed
    Summary
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    Immune complexes (IC) are elevated in Behçet's disease patients, correlating with disease activity. These immune complexes may play a role in the condition's development.

    Area of Science:

    • Immunology
    • Rheumatology

    Background:

    • Behçet's disease is a chronic inflammatory disorder of unknown etiology.
    • Immune complexes (IC) are implicated in the pathogenesis of various autoimmune and inflammatory conditions.

    Purpose of the Study:

    • To investigate the presence and levels of immune complexes (IC) in patients with Behçet's disease.
    • To explore the correlation between IC levels and disease activity, duration, and organ involvement.

    Main Methods:

    • Sera from 18 Behçet's disease patients were analyzed for IC using Raji-cell and C1q-binding radioimmunoassays.
    • IC levels were correlated with disease activity scores.
    • IC were fractionated using sucrose density gradient and Sephadex column techniques.

    Main Results:

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    • Elevated IC levels were detected in 44% of patients by the Raji-cell assay and in 50% by the C1q-binding assay.
    • A significant correlation was found between the presence of IC and disease activity score (P = 0.003).
    • Abnormal IC levels persisted over a 1-year follow-up period.

    Conclusions:

    • Immune complexes (IC) are frequently present in Behçet's disease patients.
    • Elevated IC levels are associated with disease activity.
    • IC may contribute to the pathophysiology of Behçet's disease.