The Journal of Experimental Medicine
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© The Rockefeller University Press, 0022-1007/1997/3/1101/ $5.00
The Journal of Experimental Medicine, Volume 185, Number 6, March 17, 1997 1101-1112


Articles

The Enigmatic Plasmacytoid T Cells Develop into Dendritic Cells with Interleukin (IL)-3 and CD40-Ligand

Géraldine Grouard*, Marie-Clotilde Rissoan*, Luis Filgueira{ddagger}, Isabelle Durand*, Jacques Banchereau*, and Yong-Jun Liu*

From * Schering-Plough, Laboratory for Immunological Research, 69571 Dardilly, France; and {ddagger} Institute of Anatomy, Division of Cell Biology, University Irchel-Zurich, 8057 Zurich, Switzerland

A subset of CD4+CD11cCD3 blood cells was recently shown to develop into dendritic cells when cultured with monocyte conditioned medium. Here, we demonstrate that CD4+ CD11cCD3 cells, isolated from tonsils, correspond to the so-called plasmacytoid T cells, an obscure cell type that has long been observed by pathologists within secondary lymphoid tissues. They express CD45RA, but not markers specific for known lymphoid- or myeloid-derived cell types. They undergo rapid apoptosis in culture, unless rescued by IL-3. Further addition of CD40-ligand results in their differentiation into dendritic cells that express low levels of myeloid antigens CD13 and CD33.


Address correspondence to Yong-Jun Liu, Schering-Plough, Laboratory for Immunological Research, 27 Chemin des Peupliers, BP 11, 69571 Dardilly, France.

G. Grouard was supported by the Foundation Marcel Merieux, Lyon, France.

1Abbreviations used in this paper: DC, dendritic cell; GCDC, dendritic cells within germinal centers; HEV, high endothelial veinules; RER, rough endoplasmic reticulum; SEM, scanning electron microscopy; TEM, transmission electron microscopy.


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