Plasma cells and their precursors. IV. Cross-reacting and non-cross-reacting, sheep erythrocyte lysing IgG antibody clones induced in rabbits immunized with rat- and chicken-erythrocytes.
Rabbits were i.v. immunized with rat erythrocytes or chicken erythrocytes. The sera were investigated using the IEF technique. A number of the RRBC immunized animals and a high proportion of the CRBC immunized animals contained SRBC-lysing IgG antibody clones in addition to apparently normal anti-RRBC or anti-CRBC antibodies. Intravenous immunization with RRBC, followed by immunization with CRBC, yielded clones of SRBC-lysing IgG antibodies in almost every rabbit tested. By varying the interval between the RRBC- and CRBC injections, we established that the time needed for the RRBC-induced production of the responsible SRBC-specific IgG AFCP is approximately 5 days. These cells show an average functional half-life of 75 days. At least some of the RRBC- and CRBC-evoked SRBC-lysing IgG antibody clones are incapable of lysing either RRBC or CRBC. We suggest that the production of cross-reactive and non-cross-reactive, hetero-specific AFCP provides a natural explanation for the availability of preexistent AFCP responsible for the presence of the "early phase" of the IgG antibody response to several antigens.
D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology*; D002645:Chickens / Q000276:immunology; D003429:Cross Reactions; D004912:Erythrocytes / Q000276:immunology*; D006168:Guinea Pigs; D006461:Hemolysis; D007074:Immunoglobulin G / Q000276:immunology*; D008297:Male; D011817:Rabbits / Q000276:immunology; D051381:Rats / Q000276:immunology; D012756:Sheep / Q000276:immunology
D000911:Antibodies, Monoclonal; D007074:Immunoglobulin G