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Antibody avidity for native DNA in lupus nephritis
Contributions to Nephrology
|January 1, 1975
Summary
Antibody avidity to native DNA is linked to lupus nephritis activity. Higher avidity correlates with increased disease severity and distinct immune complex deposition patterns in the kidneys.
Area of Science:
- Immunology
- Nephrology
- Rheumatology
Background:
- Investigating the role of antibody avidity in the pathogenesis of lupus nephritis.
- Measuring antibody avidity to native DNA in Systemic Lupus Erythematosus (SLE) patients.
Observation:
- Antibody avidity to native DNA was generally below 40% in SLE patients.
- A positive correlation was observed between antibody avidity and histological activity of lupus nephritis.
- Higher avidity sera were found in active lupus nephritis groups compared to inactive or nephritis-free groups.
Findings:
- High-avidity antibody complexes deposited in subendothelial and mesangial areas of the glomerular basement membrane (GBM).
- Low-avidity antibody complexes localized to the subepithelial side of the GBM.
- In vitro studies showed high-avidity antibody complexes were larger than low-avidity complexes, exceeding 19S.
Implications:
- Host immune response variability, specifically antibody avidity, significantly impacts immune complex formation.
- Antibody avidity influences the histological activity and nephritogenicity of lupus nephritis.
- Understanding antibody avidity may offer insights into lupus nephritis pathogenesis and potential therapeutic targets.