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Circulating immune complexes in multiple sclerosis: relation with disease activity

M K Dasgupta, K G Warren, K V Johny

    Neurology
    |September 1, 1982
    PubMed
    Summary
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    Circulating immune complexes (CIC) were detected in 35% of multiple sclerosis (MS) patients. The Raji-RIA assay showed the highest sensitivity for detecting CIC, which were more prevalent in active MS disease states.

    Area of Science:

    • Immunology
    • Neurology
    • Clinical Chemistry

    Background:

    • Circulating immune complexes (CIC) are implicated in various autoimmune and inflammatory conditions.
    • Understanding the role of CIC in multiple sclerosis (MS) may provide insights into disease pathogenesis and activity.

    Purpose of the Study:

    • To investigate the prevalence and significance of CIC in patients with multiple sclerosis (MS).
    • To compare the sensitivity of different assays for CIC detection in MS sera.

    Main Methods:

    • Sera from 254 MS patients were analyzed for CIC using three distinct assays: Raji-RIA, Clq-PEG, and Conglutinin-BA.
    • CIC detection rates were compared across different MS disease states (acute relapse, progressive, remission, stable) and with normal and neurologic controls.
    • Association with HLA-B7 was also examined.

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    Main Results:

    • Thirty-five percent of MS patients tested positive for CIC by at least one assay.
    • The Raji-RIA assay demonstrated the highest sensitivity (29.4%) for CIC detection.
    • CIC incidence was notably higher in patients with acute relapse (33.3%) and progressive MS (30.2%) compared to controls.
    • A significant difference in CIC incidence was observed between neurologic controls and patients with acute relapse and progressive MS.

    Conclusions:

    • Circulating immune complexes are present in a substantial proportion of MS patients, particularly during active disease phases.
    • The Raji-RIA assay is a sensitive method for detecting CIC in MS.
    • Elevated CIC levels in active MS suggest a potential role in disease activity and warrant further investigation.