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. 1992 Jan;75(1):86–91.

Primary and secondary human in vitro T-cell responses to soluble antigens are mediated by subsets bearing different CD45 isoforms.

M Plebanski 1, M Saunders 1, S S Burtles 1, S Crowe 1, D C Hooper 1
PMCID: PMC1384807  PMID: 1371496

Abstract

A culture system has been developed which consistently supports in vitro proliferative responses to conventional soluble antigens by human CD4+ T cells from non-immunized donors. T cells exposed to an antigen in primary cultures could be restimulated in vitro in an antigen-specific manner to give secondary responses with greater magnitudes and a more rapid onset than the initial reaction. To characterize further the responding T-cell population in primary compared with secondary reactions, T cells were depleted of CD45RA+ or CD45RO+ cells and stimulated with recall and non-recall antigens. It was found that the soluble non-recall antigen keyhole limpet haemocyanin did not stimulate CD45RO+ T cells, yet induced strong proliferative responses from CD45RA+ T cells. Conversely, it was confirmed that human CD45RO+ T cells respond to the recall antigen-purified protein derivative from Mycobacterium tuberculosis. Cell mixing experiments indicated that CD45RO+ T cells are unlikely to have any suppressive effect on the reactivity of CD45RA+ cells to non-recall antigens. These data provide new support for the hypothesis that CD45RA+ represents the naive and CD45RO+ the memory phenotype of human CD4+ T 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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