Abstract:
:In an attempt to find a direct method for the determination of circulating immune complexes in pathological sera we studied the ability of Cibacron Blue 3GA covalently bound to Sepharose 4B to bind heat- or antigen-aggregated human IgG. Blue-Sepharose was found to bind significant amounts of aggregated IgG (about 1.5 mg/ml packed gel) but very low amounts of monomeric IgG (about 0.1 mg/ml gel). The ability of Blue-Sepharose to bind immune complexes was tested on human pathological sera containing variable amounts of circulating immune complexes. Using both a turbidimetric measurement and Barkas' method we found that Blue-Sepharose is able to remove a very high percent of circulating immune complexes (greater than 80%) from sera. Considering the above observations a new method is described for the direct determination of circulating immune complexes using Blue-Sepharose as serum adsorbent and either 125I-labeled protein A or 125I-labeled rabbit IgG anti-human IgG to demonstrate the binding of immune complexes.
journal_name
J Immunol Methodsjournal_title
Journal of immunological methodsauthors
Dobre MA,Moţa Gdoi
10.1016/0022-1759(83)90317-4subject
Has Abstractpub_date
1983-12-16 00:00:00pages
207-15issue
1-2eissn
0022-1759issn
1872-7905pii
0022-1759(83)90317-4journal_volume
65pub_type
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