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. 1986 Aug;58(4):529–534.

Effect of chemical cationization of antigen on glomerular localization of immune complexes in active models of serum sickness nephritis in rabbits.

A Koyama, H Inage, M Kobayashi, M Narita, S Tojo
PMCID: PMC1453099  PMID: 3733152

Abstract

The effect of chemical cationization of antigen on the glomerular localization and formation of immune complexes (IC) was investigated utilizing the models of acute accelerated and chronic serum sickness nephritis in rabbits. In acute accelerated serum sickness, neither antibody nor antigen was detected in the glomerulus before the second injection of antigen. At 15 min after the challenge, rabbits given cationized BSA developed IC deposition along the peripheral capillary walls, whereas no IC deposition was found in rabbits given native BSA. In chronic serum sickness, rabbits injected with a high dose (5 mg/rabbit/day), but not a low dose (500 micrograms/rabbit/day) of cationized BSA developed membranous nephropathy with severe proteinuria. In the group given cationized BSA, the levels and avidity of antibodies were lower than in the group given native BSA. Sucrose density gradient analysis of the complexes composed of 125I-cationized BSA showed that IC formed in vivo were slightly larger than 7S. These antibody characteristics, i.e. low precipitation and low avidity, continued from early on to the late period of immunization. These results suggest that chemical cationization altered the immunogenicity of the antigen and resulted in the formation of antibody of low precipitability and low avidity, even during long-term immunization.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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