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Human bone marrow hosts polyfunctional memory CD4+ and CD8+ T cells with close contact to IL-15-producing cells

Herndler-Brandstetter, Dietmar and Landgraf, Katja and Jenewein, Brigitte and Tzankov, Alexandar and Brunauer, Regina and Brunner, Stefan and Parson, Walther and Kloss, Frank and Gassner, Robert and Lepperdinger, Günter and Grubeck-Loebenstein, Beatrix. (2011) Human bone marrow hosts polyfunctional memory CD4+ and CD8+ T cells with close contact to IL-15-producing cells. Journal of immunology, Vol. 186, H. 12. pp. 6965-6971.

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Official URL: http://edoc.unibas.ch/dok/A6004846

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Abstract

Recently, a key role in memory T cell homing and survival has been attributed to the bone marrow (BM) in mice. In the human BM, the repertoire, function, and survival niches of CD4(+) and CD8(+) T cells have not yet been elucidated. In this study, we demonstrate that CD4(+) and CD8(+) effector memory T cells accumulate in the human BM and are in a heightened activation state as revealed by CD69 expression. BM-resident memory T cells produce more IFN-? and are frequently polyfunctional. Immunofluorescence analysis revealed that CD4(+) and CD8(+) T cells are in the immediate vicinity of IL-15-producing BM cells, suggesting a close interaction between these two cell types and a regulatory role of IL-15 on T cells. Accordingly, IL-15 induced an identical pattern of CD69 expression in peripheral blood CD4(+) and CD8(+) T cell subsets. Moreover, the IL-15-inducible molecules Bcl-x(L), MIP-1?, MIP-1?, and CCR5 were upregulated in the human BM. In summary, our results indicate that the human BM microenvironment, in particular IL-15-producing cells, is important for the maintenance of a polyfunctional memory CD4(+) and CD8(+) T cell pool.
Faculties and Departments:03 Faculty of Medicine > Bereich Querschnittsfächer (Klinik) > Pathologie USB > Histopathologie (Dirnhofer)
03 Faculty of Medicine > Departement Klinische Forschung > Bereich Querschnittsfächer (Klinik) > Pathologie USB > Histopathologie (Dirnhofer)
UniBasel Contributors:Tzankov, Alexandar
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:American Assoc. of Immunologists
ISSN:0022-1767
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:27 Mar 2014 13:13
Deposited On:27 Mar 2014 13:13

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