Immunoregulatory Effects of Covalent Antigen-antibody Complexes. III. Enhancement or Suppression Depending on the Time of Administration of Complex Relative to a T-independent Antigen

Overview

Journal Immunology

Specialty Allergy & Immunology

Date 1981 Feb 1

PMID 7007223

Citations 3

Authors

J P Tite

C A Morrison

R B Taylor

Affiliations

Soon will be listed here.

Abstract

The photosensitive affinity label NAP (4-azido-2-nitrophenyl) was used to make a stable covalent-bonded monomeric immune complex (Ag2Ab) between rabbit anti-NAP antibody and a bihaptenic compound containing NAP linked to fluorescein (NAP-aminocaproyl-lysyl-Fl). This complex injected into mice had marked effects on their subsequent response to fluorescein coupled to a thymus-independent carrier (Fl-ficoll). Depending on the time at which the complex was administered relative to challenge, it was possible to obtain either enhancing or suppressive effects. The enhancing but not the suppressive effect of complex was dependent on immune recognition of the rabbit IgG carrier. While the suppressive effect probably results from complex-mediated inactivation of T-independent B cells, it is suggested that the enhancing effect results from priming of the T-dependent B cells by Fl-Ficoll followed by their triggering into antibody production by rabbit IgG-specific helper cells.

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