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C-type virus expression in systemic lupus erythematosus.

S Panem, N G Ordóñez, W H Kirstein

    The New England Journal of Medicine
    |August 26, 1976
    PubMed
    Summary
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    Lupus nephropathy kidneys show specific C-type viral antigens (HEL-12 virus) deposited with immune complexes. This finding suggests a direct link between this virus and lupus nephropathy development.

    Area of Science:

    • Nephrology
    • Virology
    • Immunology

    Background:

    • Lupus nephropathy is an autoimmune kidney disease characterized by immune complex deposition.
    • The role of viral agents in the pathogenesis of lupus nephropathy remains an area of investigation.

    Purpose of the Study:

    • To investigate the presence of C-type viral antigens in kidneys from patients with lupus nephropathy.
    • To determine if these viral antigens are associated with immune complex deposition in lupus nephropathy.

    Main Methods:

    • Indirect immunofluorescence was used to detect HEL-12 virus antigens in kidney biopsies.
    • Kidney specimens from lupus nephropathy, other glomerulonephritis, and normal controls were analyzed.
    • Antibody eluted from lupus nephropathy kidneys was tested against HEL-12 virus-infected cells.

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    Main Results:

    • HEL-12 virus antigens were detected in all 11 lupus nephropathy specimens, co-localizing with immune complexes.
    • The intensity of HEL-12 antigen detection correlated with immune complex deposition.
    • No HEL-12 virus antigens were found in non-lupus renal lesions or normal kidney tissues.
    • Eluted antibodies from lupus kidneys reacted specifically with HEL-12 virus-infected cells.

    Conclusions:

    • There is a specific association between lupus nephropathy and C-type viral (HEL-12) antigen deposition.
    • These viral antigens are deposited as part of antigen-antiviral antibody complexes in lupus nephropathy.
    • The findings suggest a potential etiological role for HEL-12 virus in lupus nephropathy.