What is Anti-Double-Stranded DNA Antibody (IgG)?
Anti-dsDNA antibodies arise from dysregulated B-cell tolerance and target the phosphodiester backbone of double-stranded DNA, forming pathogenic immune complexes that deposit in glomeruli and other tissues, driving complement activation and organ inflammation. Titre levels fluctuate dynamically with lupus disease activity, distinguishing anti-dsDNA from most other panel components which remain stable once positive.