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Pathogenesis of SLE: immunopathology in man.
J R Kalden1, T H Winkler, M Herrmann
1Department of Medicine III, University Erlangen-Nürnberg, Federal Republic of Germany.
Rheumatology International
|January 1, 1991
Summary
Antibodies against native DNA are key in systemic lupus erythematosus (SLE) pathogenesis. Studies suggest these antibodies are antigen-driven, potentially linked to retroviral elements in SLE patients.
Area of Science:
- Immunology
- Molecular Biology
- Rheumatology
Background:
- Antibodies against native DNA are specific markers and pathogenic factors in systemic lupus erythematosus (SLE).
- The origin of anti-double-stranded DNA (anti-dsDNA) antibodies remains unclear, as dsDNA is typically non-immunogenic.
- Elevated nucleic acids in SLE sera suggest defective clearance mechanisms.
Purpose of the Study:
- To investigate the antigen-driven origin of anti-dsDNA antibodies in SLE.
- To explore the potential role of plasma nucleic acids in SLE pathogenesis.
Main Methods:
- Establishment and sequence analysis of human anti-dsDNA antibody clones from SLE patients.
- Isolation and structural analysis of plasma nucleic acids from SLE patient immune complexes.
Main Results:
- Evidence suggests anti-dsDNA antibodies are antigen-driven, not germline-encoded.
- Plasma nucleic acids in SLE patients exhibit amino acid sequence homology with HIV-1 gag-pol region.
- Homology may indicate retroviral involvement or endogenous retroviral family similarities.
Conclusions:
- Anti-dsDNA antibodies in SLE are likely antigen-driven.
- Plasma nucleic acid structures in SLE patients warrant further investigation for pathogenic roles.
- Potential links to retroviruses, either exogenous or endogenous, in SLE pathogenesis require clarification.