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. 1983 Jun;40(3):894–902. doi: 10.1128/iai.40.3.894-902.1983

Antibody responses induced by immunization of inbred mice susceptible and resistant to African trypanosomes.

L A Mitchell, T W Pearson
PMCID: PMC348136  PMID: 6852924

Abstract

We tested the ability of inbred mice that were either susceptible (strain A/J) or resistant (strain C57BL/6 and A/J X C57BL/6 hybrids) to African trypanosomes to produce specific antibodies to trypanosome antigens in the absence of living parasites. This experiment was carried out to eliminate the influence of trypanosome growth or metabolism on immune responsiveness. Mice were immunized with keyhole limpet hemocyanin or solubilized Trypanosoma brucei gambiense, and serum antibodies were measured in solid-phase radioimmunometric assays after primary and challenge injections. Both susceptible and resistant mice showed increases in keyhole limpet hemocyanin-specific or trypanosome-specific immunoglobulin M and immunoglobulin G after immunization. When immunized with trypanosome antigens, resistant mice made qualitatively and quantitatively superior specific immunoglobulin M responses, particularly to the trypanosome major variable surface glycoprotein. Susceptible A/J mice produced good specific antibody responses, although these were predominantly of the immunoglobulin G isotypes. These results show that A/J and C57BL/6 mice respond differentially in terms of immunoglobulin isotype and repertoire in response to injected antigens. The possibility that this differential antibody response influences susceptibility to African trypanosomes is discussed.

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Selected References

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