title: The role of B-cell memory in secondary IgG and IgM responses.
abstract: Mice were primed with the hapten 3-nitro-4-hydroxy-5 iodophenacetic acid (NIP) conjugated to chicken globulin (cg) and were boosted 2, 6, or 12 months later with CG conjugates of the related haptens 3,5-diiodo-4-hydroxyphenacetic acid (DIP) or 3-nitro-4-hydroxphenacetic acid (NP). Accelerated secondary responses were demonstrated both in the 7S and 19S class. Fine-specificities of secondary-response antibodies were studied by the hapten inhibition method of haptenated bacteriophage inactivation. 7S antibodies were found to have the fine-specificity of anti-NIP antibodies regardless of whether DIP or NP was the booster hapten ('original antigenic sin'). 19S antibodies had the fine-specificity of anti-DIP when DIP was the booster hapten. NP as the booster hapten resulted in 19S antibodies whose fine-specificity was intermediate between anti-NIP and anti-NP. A strong B-cell memory could thus be demonstrated in the 7S antibody response and a weak B-cell memory in the 19S antibody response.
mesh_terms: D000818:Animals; D000906:Antibodies / Q000032:analysis; D000917:Antibody Formation / Q000187:drug effects; D000918:Antibody Specificity; D001402:B-Lymphocytes / Q000276:immunology*; D005916:Globulins / Q000494:pharmacology; D006241:Haptens / Q000494:pharmacology; D007117:Immunization, Secondary; D007074:Immunoglobulin G; D007075:Immunoglobulin M; D007156:Immunologic Memory / Q000187:drug effects; D051379:Mice; D008808:Mice, Inbred CBA; D009592:Nitrohydroxyiodophenylacetate / Q000494:pharmacology
chemical_list: D000906:Antibodies; D005916:Globulins; D006241:Haptens; D007074:Immunoglobulin G; D007075:Immunoglobulin M; D009592:Nitrohydroxyiodophenylacetate