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  • Title: Isolation of human anti-idiotypes broadly cross reactive with anti-dsDNA antibodies from patients with Systemic lupus erythematosus.
    Author: Zhang W, Winkler T, Kalden JR, Reichlin M.
    Journal: Scand J Immunol; 2001 Feb; 53(2):192-7. PubMed ID: 11169224.
    Abstract:
    Antibodies to double stranded (ds)DNA play a central role in clinical diagnosis and disease expression in Systemic lupus erythematosus (SLE). This paper describes the isolation of anti-idiotype reagents (anti/antidsDNA) from four SLE sera and the demonstration of broad and quantitatively similar cross reactivity to both polyclonal and monoclonal anti-dsDNA antibodies isolated from SLE patients. Seven affinity-purified polyclonal and three monoclonal human anti-dsDNA preparations reacted preferentially with anti-idiotype F(ab')(2) coated plates compared to normal immunoglobulin (Ig)G F(ab')(2) coated plates in ELISA. In contrast, autoantibodies of other specificities (anti-Ro/SSA, anti-La/SSB, and anti-U(1)RNP) reacted equally with anti/anti-dsDNA F(ab')(2) and normal IgG F(ab')(2) coated plates. Such anti-idiotypic antibodies could play a significant role in the regulation of anti-dsDNA antibody levels in SLE.
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