Inbred strain 2 and (strain 2 × strain 13) F1 guinea pigs were made allergic by intraperitoneal injections of sulphonamide-chicken γ-globulin (CGG) conjugates. Two sulphonamides were used: 4-sulphanilamide benzoic acid (4-SABA) and sulphamethoxazole (SMX). 4-SABA was coupled to CGG through its carboxylic group and SMX was coupled following diazotization of its sulphanilamide group. The anti-4-SABA and anti-SMX reaginic antibodies formed did not show any cross-reactivity with each other. Injection of 4-SABA coupled to native levan effectively suppressed the allergic responses of these guinea pigs when given either prior to or after immunization with 4-SABA-CGG. This treatment is specific as it did not affect anti-SMX or anti-CGG reaginic responses. Guinea pigs seem more sensitive to the regime used for tolerance induction than correspondingly sensitized mice in that less tolerogen is required on a body weight basis.

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© 1979 S. Karger AG, Basel
1979
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