The Journal of Experimental Medicine
Janeway's Immunobiology 7th Edition
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The Journal of Experimental Medicine, Vol 127, 137-154, Copyright © 1968 by The Rockefeller University Press

ARTICLE

STUDIES ON CIRCULATING IMMUNE COMPLEXES : III. FACTORS GOVERNING THE ABILITY OF CIRCULATING COMPLEXES TO LOCALIZE IN BLOOD VESSELS



Charles G. Cochrane M.D.1 and David Hawkins M.D.1

1 From the Department of Experimental Pathology, Scripps Clinic and Research Foundation, La Jolla, California 92037

The relationship between certain physicochemical properties of circulating immune complexes and their ability to localize in vessel walls during a state of increased permeability was studied. The ability to become deposited was related to the large size of complexes, rather than to their net charge or to a specific affinity between complexes and structures of vessel walls.

Soluble complexes with sedimentation rates greater than 19S were capable of being entrapped along the vessel wall membranes, while complexes smaller than this were not. These large complexes were removed rapidly from the circulation, while smaller complexes persisted. Minimal levels of total complexes in the circulation necessary for detectable vascular localization were found to be as low as 15 µg antibody N/ml plasma.

In experimental serum sickness, a disease known to be induced by circulating immune complexes, the development of vascular and glomerular lesions occurred almost exclusively in rabbits having large (greater than 19S) circulating immune complexes. Animals with smaller complexes did not show deposition of complexes in glomeruli or development of glomerulonephritis. Their incidence of vasculitis was markedly reduced.

 Submitted on August 21, 1967


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