In vivo enhancement of the specific antibody response via the low-affinity receptor for IgE

Eur J Immunol. 1993 Jul;23(7):1739-42. doi: 10.1002/eji.1830230754.

Abstract

The ability of antigen-specific IgE antibodies to modulate the in vivo antibody response was studied by comparing the antibody response in mice immunized with 2,4,6-trinitrophenyl (TNP)-specific monoclonal IgE followed by bovine serum albumin (BSA)-TNP or with BSA-TNP alone. The serum IgG antibody response against BSA, measured in enzyme-linked immunosorbent assay ELISA, was enhanced up to 100-fold in groups receiving IgE. The enhancement required specific interaction between IgE and antigen, since no effect was seen when unconjugated BSA was used as antigen. Polyclonal activation by IgE/antigen complexes did not occur. IgE given 24 h after specific antigen had no stimulatory capacity. Pretreatment of the mice with Fc epsilon receptor type II (Fc epsilon RII)-specific monoclonal antibody completely inhibited the IgE-mediated enhancement. Thus, the data demonstrate for the first time an in vivo role for Fc epsilon RII in enhancement of specific antibody production.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Antibody Formation*
  • Antigens
  • Immunoglobulin E / immunology*
  • Mice
  • Receptors, IgE / physiology*
  • Signal Transduction

Substances

  • Antigens
  • Receptors, IgE
  • Immunoglobulin E