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. 1971 May;20(5):707–718.

Requirement for continuous antigenic stimulation in the development and differentiation of antibody-forming cells. Effect of antigen dose

M G Hanna Jr, Leona C Peters
PMCID: PMC1455882  PMID: 4950863

Abstract

The concept that antigen has a continuous role in the recruitment and differentiation of immune progenitor cells was tested with optimum and suboptimum doses of heterologous erythrocytes in mice. These studies further evaluated an immune cell maturation scheme in which continuous antigenic stimulation is required for both the recruitment of `antigen-sensitive units' and the expansive proliferation of a distinct sensitized cell compartment, which undergoes irreversible differentiation to functional antibody-forming cells. Haemolytic plaque-forming cell capacity during both the primary and secondary immune reactions were studied, both in the intact animal and with the spleen cell transfer technique. This in vivo culture technique was used to measure the sensitized cell compartment in the absence of existing antibody regulatory mechanisms. The results clearly demonstrate a higher detectable secondary immune capacity in the suboptimum antigen dose group than in the optimum antigen dose group. This was demonstrated for both the 19S and 7S cellular responses, as well as with humoral antibody levels measured in the spleen cell recipient mice. It can be concluded that in the presence of a suboptimum dose of antigen, which rapidly diminishes during the early intervals of the primary response, there is adequate recruitment with subsequent preservation or rescue from antigen-mediated depletion of the sensitized cell compartment, at the expense of the detectable primary response.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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