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. 1971 May;20(5):693–705.

Identification by density separation of antigen-specific surface receptors on the progenitors of antibody-producing cells

R M Gorczynski, R G Miller, R A Phillips
PMCID: PMC1455865  PMID: 5317482

Abstract

Initiation of an immune response to sheep erythrocytes by the transplantation of spleen cells into irradiated recipients is thought to involve an interaction between two functionally different lymphoid cells. If such populations actually exist, it should be possible to separate them from each other and to study the properties of each type of cell. To this end, mouse spleen cells have been fractionated using equilibrium centrifugation in density gradients of Ficoll. Two functionally different populations of spleen cells were obtained. Neither population was active in initiating an immune response by itself on transplantation into irradiated mice, but mixtures of the two populations were. One population of spleen cells was also active when transplanted together with normal mouse bone marrow and the other population was active when mixed with thymus cells from normal mice. These results indicate that two different spleen cells must interact to initiate an immune response in vivo.

The specificity of the cell that synergizes with thymus cells was investigated further and shown to have antigen-specific receptors on its surface. These cells can be recognized by their ability to make rosettes with erythrocyte antigens. Thus, the `background' rosette-forming cells found in unimmunized mice are actually progenitors of antibody-producing cells.

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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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