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Blood, 15 October 2007, Vol. 110, No. 8, pp. 3078-3081.
Prepublished online as a Blood First Edition Paper on July 6, 2007; DOI 10.1182/blood-2006-12-062984.
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Submitted December 19, 2006
Accepted June 21, 2007
G-CSF mobilizes slanDC (6-sulfo LacNAc+ dendritic cells) with a high proinflammatory capacity
Susanne H C Baumeister, Kristina Holig, Martin Bornhauser, Michael Meurer, E. Peter Rieber, and Knut Schakel*
Institute of Immunology, Medical Faculty, Technische Universitat Dresden, Dresden, Germany
Department of Internal Medicine, Medical Faculty, Technische Universitat Dresden, Dresden, Germany
Department of Dermatology, Medical Faculty, Technische Universitat Dresden, Dresden, Germany
* Corresponding author; email: knut.schaekel{at}tu-dresden.de.
Donor dendritic cells (DC) play a pivotal role in the induction of immunity and tolerance after peripheral blood stem cell transplantation (PBSCT). Treatment of healthy donors with granulocyte-colony stimulating factor (G-CSF) increases the numbers of tolerogenic DC and T cells among mobilized blood leukocytes in the graft. SlanDC (6-sulfo LacNAc+ DC), a major source of IL-12 and TNF- in blood, have not been studied in this respect. Here, we demonstrate that slanDC (14.9x106/L to 64.0x106/L) are efficiently mobilized by G-CSF and retain their capacity to produce IL-12 and TNF- at high levels. Furthermore, G-CSF-mobilized slanDC programmed the differentiation of Th1 cells and displayed a particularly strong capacity to stimulate the proliferation of naive allogeneic T cells. Thus, slanDC transfused into recipients of allogeneic PBSCT are functionally fully capable and may be critical in supporting graft-versus-host disease as well as graft-versus-leukemia effects.

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