Radioimmunological detection of soluble immune complexes in serum (author's transl)]

Immune complexes could be measured in sera with the use of plastfixed Clq and 125J-labeled anti-Ig-antibody. The sensitivity of the system is 0.1 microgram aggregated human IgG, the working range is between 0.1 and 10 micrograms per 0.5 ml. In 58% of the sera from patients with systemic lupus erythematosus was found an increase in the immune complex content.