Reconstitution of 6-sulfo LacNAc dendritic cells after allogeneic stem-cell transplantation.

Abstract:

BACKGROUND:Infections and acute graft-versus-host disease (GvHD) represent major complications of allogeneic stem-cell transplantation (SCT). Dendritic cells (DCs) display an extraordinary capacity to induce innate and adaptive immune responses. Therefore, they play a crucial role in the elimination of pathogens and in the pathogenesis of acute GvHD. 6-Sulfo LacNAc DCs (slanDCs) are a major subpopulation of human blood DCs with a high proinflammatory capacity. We investigated for the first time the reconstitution of slanDCs in the blood of patients after SCT and the modulation of their frequency by bacterial infection, cytomegalovirus (CMV) reactivation, and acute GvHD. METHODS:The frequency of slanDCs, CD1c myeloid DCs (mDCs), and plasmacytoid DCs (pDCs) in the peripheral blood was quantified by flow cytometry in 80 patients after SCT. To assess individual DC subsets, we used pregating of the HLADRLin subset and antibodies against slanDCs, blood DC antigen 1 (CD1c mDCs), and blood DC antigen 2 (pDCs). RESULTS:SlanDCs showed the slowest reconstitution in the first month after SCT compared with CD1c mDCs and pDCs. Interestingly, in the second and third months after SCT, their percentage steadily increased, and slanDCs were the most abundant DC subset. In addition, we observed a markedly reduced frequency of slanDCs in the blood of patients with bacterial infection, CMV reactivation, or severe acute GvHD. Furthermore, slanDCs showed the most prominent reduction after steroid treatment of acute GvHD. CONCLUSIONS:These results indicate that SCT-associated complications such as bacterial infection, CMV reactivation, and acute GvHD can significantly modulate the frequency of slanDCs.

journal_name

Transplantation

journal_title

Transplantation

authors

Mager K,Wehner R,Bahr F,Oelschlägel U,Platzbecker U,Wermke M,Shayegi N,Middeke JM,Radke J,Röllig C,Schetelig J,Thiede C,Ehninger G,Schmitz M,Bornhäuser M,Tuve S

doi

10.1097/TP.0b013e31824fd8b4

subject

Has Abstract

pub_date

2012-06-27 00:00:00

pages

1270-5

issue

12

eissn

0041-1337

issn

1534-6080

journal_volume

93

pub_type

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