Human 6-sulfo LacNAc (slan) dendritic cells have molecular and functional features of an important pro-inflammatory cell type in lupus erythematosus

Lupus erythematosus (LE) is an autoimmune disease with evidence for an IL-23- and IL-17-induced immunopathology. Little is known about the type of dendritic cells supporting this immune response. We recently demonstrated the strong Th1- and Th17-T-cell inducing capacity of human 6-sulfo LacNAcdendri...

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Hauptverfasser: Hänsel, Anja (VerfasserIn) , Bidier, Mona (VerfasserIn) , Lorenz, Hanns-Martin (VerfasserIn) , Döbel, Thomas (VerfasserIn) , Enk, Alexander (VerfasserIn) , Schäkel, Knut (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 2013
In: Journal of autoimmunity
Year: 2012, Jahrgang: 40, Pages: 1-8
ISSN:1095-9157
DOI:10.1016/j.jaut.2012.07.005
Online-Zugang:Verlag, Volltext: http://dx.doi.org/10.1016/j.jaut.2012.07.005
Verlag, Volltext: http://linkinghub.elsevier.com/retrieve/pii/S0896841112001011
Volltext
Verfasserangaben:Anja Hänsel, Claudia Günther, Wojciech Baran, Mona Bidier, Hanns-Martin Lorenz, Marc Schmitz, Michael Bachmann, Thomas Döbel, Alexander H. Enk, Knut Schäkel

MARC

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520 |a Lupus erythematosus (LE) is an autoimmune disease with evidence for an IL-23- and IL-17-induced immunopathology. Little is known about the type of dendritic cells supporting this immune response. We recently demonstrated the strong Th1- and Th17-T-cell inducing capacity of human 6-sulfo LacNAcdendritic cells (slanDCs), and identified slanDCs as inflammatory dermal dendritic cells in psoriasis locally expressing IL-23, TNF-a and inducible nitric oxide synthase (iNOS). In this study, we investigated the role of slanDCs in LE. Using immunohistochemistry, we identified slanDCs at increased frequency in affected skin lesions of cutaneous and systemic LE. slanDCs were found scattered in the dermal compartment and also clustered in lymph follicle-like structures. Here, they colocalized with T cells in the periphery but not with B cells in the center. The positive staining of dermal slanDCs for TNFa indicated their pro-inflammatory status. In vitro the production of TNF-a was induced when slanDCs were cultured in the presence of serum from patients with LE. Stimulatory components of LE serum were previously identified as autoimmune complexes with ssRNA binding to TLR7 and TLR8. We found that slanDCs express mRNA for TLR7 and TLR8. slanDCs stimulated with ssRNA, selective TLR7 or TLR8 ligands responded with high-level TNF-a and IL-12 production. In contrast to slanDCs, the population of CD1cþ DCs and plasmacytoid DCs (pDCs) expressed either TLR7 or TLR8, and their production of TNF-a and IL-12 to respective ligands was far less pronounced. We conclude that slanDCs have molecular and functional features of a pro-inflammatory myeloid DC type relevant for the immunopathogenesis of LE. 
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