The detection of antigens in immune complexes.

Abstract:

:A procedure is described for the purification of soluble immune complexes (IC) from biologica fluids and for the detection of antibody-bound antigen. A model IC, prepared with various amounts of human serum albumin (HSA) and constant amounts of anti-HSA, gave a 44% recovery after gel filtration on Sephacryl S-300, affinity chromatography on protein A--Sepharose, and concentration of eluates there from before analysis by sodium dodecyl sulphate--polyacrylamide gel electrophoresis. It was calculated that 20 ng of antibody-bound HSA should be detectable when polyacrylamide gels are subjected to a direct radioimmunoassay involving the use of rabbit anti-HSA, 125I-protein A, and autoradiography, thus defining the sensitivity of the procedure for detecting IC-bound antigen in a model system. The procedure has direct relevance to the examination of IC of unknown composition present in sera of individuals with various diseases.

journal_name

Scand J Immunol

authors

Heimer R,Glick DL,Abruzzo JL

doi

10.1111/j.1365-3083.1981.tb00154.x

subject

Has Abstract

pub_date

1981-01-01 00:00:00

pages

441-6

issue

5

eissn

0300-9475

issn

1365-3083

journal_volume

13

pub_type

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