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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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TRANSPLANTATION
Brief Report
G-CSF mobilizes slanDCs (6-sulfo LacNAc+ dendritic cells) with a high proinflammatory capacity
Susanne H. C. Baumeister1,
Kristina Hölig2,
Martin Bornhäuser2,
Michael Meurer3,
E. Peter Rieber1, and
Knut Schäkel1,3
1 Institute of Immunology,
2 Department of Internal Medicine Medical Faculty, and
3 Department of Dermatology, Technische Universität Dresden, Dresden, Germany
Donor dendritic cells (DCs) 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 DCs and T cells among mobilized blood leukocytes in the graft. SlanDCs (6-sulfo LacNAc+ DCs), a major source of IL-12 and TNF- in blood, have not been studied in this respect. Here, we demonstrate that slanDCs (14.9 x 106/L to 64.0 x 106/L) are efficiently mobilized by G-CSF and retain their capacity to produce IL-12 and TNF- at high levels. Furthermore, G-CSF–mobilized slanDCs programmed the differentiation of Th1 cells and displayed a particularly strong capacity to stimulate the proliferation of naive allogeneic T cells. Thus, slanDCs transfused into recipients of allogeneic peripheral blood stem cell (PBSC) transplants 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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