Dec 1, 1977

Requirements for inducing tolerance of hapten-specific delayed hypersensitivity: epitope density

The Journal of Immunology : Official Journal of the American Association of Immunologists
M M MoonD C Bauer


Tolerance to hapten-specific antibody formation and delayed hypersensitivity was examined in adult rabbits. The azobenzenearsonate (ABA) or sulfonate-specific antibody response to hapten-hemocyanin immunogens was suppressed by deaggregated hapten-rabbit IgG conjugates given 21 and 14 days before challenge. High affinity antibody was preferentially suppressed. Delayed hypersensitivity to ABA-tyrosine was suppressed by deaggregated ABA-rabbit IgG conjugates injected 17 and 10 days before challenge. Conjugates with a high hapten density, ABA15-23-rabbit IgG were effective tolerogens. Conjugates with four to six ABA groups per carrier molecule were very poor tolerogens. Increasing the amount of low substituted conjugate injected did not improve tolerogenicity. It appears that a high epitope density is required for effective induction of tolerance to ABA-specific delayed hypersensitivity in the rabbit.

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Mentioned in this Paper

Antigenic Specificity
Antibody Formation
Lymphocyte Activation
Plasma Albumin
Hemocyanin Activity
Tyrosine Measurement

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