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Immune complexes in diabetes mellitus.

J A Charlesworth, L V Campbell, J Quin

    Australian and New Zealand Journal of Medicine
    |August 1, 1979
    PubMed
    Summary
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    Immune complexes are common in diabetics, particularly those on standard insulins or oral agents. Monocomponent insulins showed significantly fewer immune complexes, suggesting a potential role in diabetes complications.

    Area of Science:

    • Immunology
    • Endocrinology
    • Diabetology

    Background:

    • Immune complex formation is a potential factor in diabetic microvascular complications.
    • Understanding immune complex prevalence across different diabetes management strategies is crucial.

    Purpose of the Study:

    • To investigate the presence of immune complexes in well-controlled diabetic patients.
    • To compare immune complex levels in patients using standard insulins, monocomponent insulins, oral hypoglycemic agents, or diet alone.

    Main Methods:

    • Sera from 86 diabetic patients were analyzed for immune complexes using complement component measurement, Clq binding assay (BA), and Raji cell radioimmunoassay (RIA).
    • Patients were categorized based on their treatment: standard insulins, monocomponent insulins, oral hypoglycemic agents, or dietary restriction.

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    Main Results:

    • Complement components were normal in all patients.
    • Positive immune complex assays (Raji cell RIA or Clq-BA) were observed in 31% of patients on standard insulins and 54% on oral agents.
    • Immune complex detection was notably lower in patients receiving monocomponent insulins (one mildly positive Raji cell RIA) and diet alone (one positive on both assays).

    Conclusions:

    • Immune complex production is prevalent in both insulin-dependent and non-insulin-dependent diabetes mellitus.
    • Monocomponent insulins are associated with a significantly lower incidence of immune complex formation compared to standard insulins and oral agents.
    • These findings may have implications for understanding the pathogenesis of microvascular complications in diabetes.