PMID- 27982014 OWN - NLM STAT- MEDLINE DCOM- 20180831 LR - 20221109 IS - 2041-1723 (Electronic) IS - 2041-1723 (Linking) VI - 7 DP - 2016 Dec 16 TI - Monocyte-derived inflammatory Langerhans cells and dermal dendritic cells mediate psoriasis-like inflammation. PG - 13581 LID - 10.1038/ncomms13581 [doi] LID - 13581 AB - Dendritic cells (DCs) have been implicated in the pathogenesis of psoriasis but the roles for specific DC subsets are not well defined. Here we show that DCs are required for psoriasis-like changes in mouse skin induced by the local injection of IL-23. However, Flt3L-dependent DCs and resident Langerhans cells are dispensable for the inflammation. In epidermis and dermis, the critical DCs are TNF-producing and IL-1beta-producing monocyte-derived DCs, including a population of inflammatory Langerhans cells. Depleting Ly6C(hi) blood monocytes reduces DC accumulation and the skin changes induced either by injecting IL-23 or by application of the TLR7 agonist imiquimod. Moreover, we find that IL-23-induced inflammation requires expression of CCR6 by DCs or their precursors, and that CCR6 mediates monocyte trafficking into inflamed skin. Collectively, our results imply that monocyte-derived cells are critical contributors to psoriasis through production of inflammatory cytokines that augment the activation of skin T cells. FAU - Singh, Tej Pratap AU - Singh TP AD - Laboratory of Molecular Immunology, National Institute of Allergy and Infectious Diseases, US National Institutes of Health, Bethesda, Maryland 20892, USA. FAU - Zhang, Howard H AU - Zhang HH AD - Laboratory of Molecular Immunology, National Institute of Allergy and Infectious Diseases, US National Institutes of Health, Bethesda, Maryland 20892, USA. FAU - Borek, Izabela AU - Borek I AD - Institute of Pathophysiology and Immunology, Medical University of Graz, 8010 Graz, Austria. FAU - Wolf, Peter AU - Wolf P AD - Department of Dermatology, Medical University of Graz, A-8036 Graz, Austria. FAU - Hedrick, Michael N AU - Hedrick MN AD - Laboratory of Molecular Immunology, National Institute of Allergy and Infectious Diseases, US National Institutes of Health, Bethesda, Maryland 20892, USA. FAU - Singh, Satya P AU - Singh SP AD - Laboratory of Molecular Immunology, National Institute of Allergy and Infectious Diseases, US National Institutes of Health, Bethesda, Maryland 20892, USA. FAU - Kelsall, Brian L AU - Kelsall BL AD - Laboratory of Molecular Immunology, National Institute of Allergy and Infectious Diseases, US National Institutes of Health, Bethesda, Maryland 20892, USA. FAU - Clausen, Bjorn E AU - Clausen BE AD - Institute for Molecular Medicine, University Medical Center of the Johannes Gutenberg-University Mainz, 55131 Mainz, Germany. FAU - Farber, Joshua M AU - Farber JM AD - Laboratory of Molecular Immunology, National Institute of Allergy and Infectious Diseases, US National Institutes of Health, Bethesda, Maryland 20892, USA. LA - eng PT - Journal Article PT - Research Support, N.I.H., Intramural PT - Research Support, Non-U.S. Gov't DEP - 20161216 PL - England TA - Nat Commun JT - Nature communications JID - 101528555 RN - 0 (Adjuvants, Immunologic) RN - 0 (Aminoquinolines) RN - 0 (Interleukin-23) RN - 0 (Membrane Proteins) RN - 0 (flt3 ligand protein) RN - P1QW714R7M (Imiquimod) SB - IM MH - Adjuvants, Immunologic/administration & dosage/pharmacology MH - Aminoquinolines/administration & dosage/pharmacology MH - Animals MH - Dendritic Cells/*physiology MH - Drug Eruptions MH - Gene Expression Regulation/drug effects MH - Humans MH - Imiquimod MH - Inflammation/*chemically induced MH - Interleukin-23/administration & dosage/pharmacology MH - Langerhans Cells/classification/*physiology MH - Major Histocompatibility Complex MH - Membrane Proteins/genetics/metabolism MH - Mice MH - Mice, Knockout MH - Monocytes/*physiology MH - Psoriasis/*pathology MH - Skin/*cytology PMC - PMC5171657 EDAT- 2016/12/17 06:00 MHDA- 2018/09/01 06:00 PMCR- 2016/12/16 CRDT- 2016/12/17 06:00 PHST- 2016/05/25 00:00 [received] PHST- 2016/10/17 00:00 [accepted] PHST- 2016/12/17 06:00 [entrez] PHST- 2016/12/17 06:00 [pubmed] PHST- 2018/09/01 06:00 [medline] PHST- 2016/12/16 00:00 [pmc-release] AID - ncomms13581 [pii] AID - 10.1038/ncomms13581 [doi] PST - epublish SO - Nat Commun. 2016 Dec 16;7:13581. doi: 10.1038/ncomms13581.