𝔖 Bobbio Scriptorium
✦   LIBER   ✦

The interaction of antibody/dna immune complexes with complement

✍ Scribed by Ronald P. Taylor; Jeffrey C. Edberg; Gregory A. Kujala; Andrew J. Sloman; Cara C. Wilson; Mary E. Cronin

Publisher
John Wiley and Sons
Year
1987
Tongue
English
Weight
967 KB
Volume
30
Category
Article
ISSN
0004-3591

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✦ Synopsis

In 28 serum and plasma samples from patients with systemic lupus erythematosus, we examined the importance of antibody class with respect to complement-mediated binding to human red blood cells (RBC) of antibody/DNA immune complexes (IC) prepared with anti-DNA antibodies. We used both 3H-double-stranded DNA and 3H-single-stranded DNA (ssDNA). Generally, double-stranded DNA IC showed considerably higher binding than did ssDNA IC in the RBC binding assay. Further analysis indicated that although ssDNA IC fix complement, it is necessary that these IC contain IgM anti-DNA antibodies in order for them to bind to RBC. The results suggest that the mechanisms of clearance and pathogenic potential of these IC may depend upon both the DNA conformation and antibody class. In particular, complement-fixing IC which contain IgG anti-DNA antibodies and ssDNA may not be cleared via the erythrocyte clearance mechanism, and therefore,

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