1972 Volume 16 Issue 2 Pages 115-123
In a previous paper we reported that an inbred strain of SL mice and an outbred strain of CFI mice belonged to the high-responder strains in antibody production after primary immunization with hamster erythrocytes (H-RBC), while inbred strains of C57BL/6, AKR and C3H/He mice belonged to low-responder strains. In the present study we obtained the following results. 1) Pre-sensitization with hamster lymphoma cnhanced antibody production after an intravenous injection of H-RBC. There was no strain difference in the pattern of antibody production against H-RBC among pre-sensitized mice. 2) The pattern of enhanced antibody production after an intravenous injection of H-RBC into pre-sensitized mice assumed the primary type in terms of time of appearance of hemolysin plaque-forming cells (PEC) in the spleens and the conversion from 2-mercaptoethanol sensitive to 2-mercaptoethanol resistant antibody production, when the intervals between both treatments were within 7 days. 3) Pre-sensitization with lymphoma induced not only an increase in numbers of PFC after an intracenous injection of H-RBC, but also an increase in the size of the hemolysin plaques. These results suggested that sensitization with hamster lymphoma stimulated some kinds of immuno-competent cells, which could contribute to antibody production against H-RBC after a booster injection of H-RBC.
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