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Progressive systemic sclerosis: autoimmune arteriopathy.

D J Evans, S J Cashman, M Walport

    Lancet (London, England)
    |February 28, 1987
    PubMed
    Summary
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    Progressive systemic sclerosis (PSS) involves widespread IgM deposition in small artery walls. This suggests PSS is an antibody-mediated vasculopathy involving complement fixation.

    Area of Science:

    • Immunology
    • Pathology
    • Rheumatology

    Background:

    • Progressive systemic sclerosis (PSS) is an autoimmune disease characterized by fibrosis and vascular abnormalities.
    • The pathogenesis of PSS involves complex immune dysregulation and tissue damage.

    Observation:

    • Widespread deposition of immunoglobulin M (IgM) was observed in the media and internal elastic lamina of small muscular arteries in a PSS case.
    • Immunoglobulin A (IgA) and complement component 3 (C3) were also detected in some affected vessels.

    Findings:

    • Antibodies eluted from kidney tissue demonstrated binding to the smooth muscle and elastic components of small arteries.
    • These findings indicate a specific autoimmune targeting of vascular structures in PSS.

    Implications:

    Related Experiment Videos

    • The results suggest that PSS can manifest as a vasculopathy.
    • The observed antibody deposition and binding patterns point towards a mechanism involving complement-fixing antibodies in PSS pathogenesis.