Identification of TNF-related apoptosis-inducing ligand and other molecules that distinguish inflammatory from resident dendritic cells in patients with psoriasis. Academic Article uri icon

Overview

abstract

  • BACKGROUND: Previous work has identified CD11c(+)CD1c(-) dendritic cells (DCs) as the major "inflammatory" dermal DC population in patients with psoriasis vulgaris and CD1c(+) DCs as the "resident" cutaneous DC population. OBJECTIVE: We sought to further define molecular differences between these 2 myeloid dermal DC populations. METHODS: Inflammatory and resident DCs were single-cell sorted from lesional skin biopsy specimens of patients with psoriasis, and the transcriptome of CD11c(+)CD1c(-) versus CD1c(+) DCs was determined. Results were confirmed with RT-PCR, flow cytometry, immunohistochemistry, and double-labeled immunofluorescence. Human keratinocytes were cultured for functional studies. RESULTS: TNF-related apoptosis-inducing ligand (TRAIL), Toll-like receptors 1 and 2, S100A12/ENRAGE, CD32, and many other inflammatory products were differentially expressed in inflammatory DCs compared with resident DCs. Flow cytometry and immunofluorescence confirmed higher protein expression on CD1c(-) versus CD1c(+) DCs. TRAIL receptors, death receptor 4, and decoy receptor 2 were expressed in keratinocytes and dermal cells. In vitro culture of keratinocytes with TRAIL induced CCL20 chemokine. CONCLUSIONS: CD11c(+)CD1c(-) inflammatory DCs in psoriatic lesional skin express a wide range of inflammatory molecules compared with skin-resident CD1c(+) DCs. Some molecules made by inflammatory DCs, including TRAIL, could have direct effects on keratinocytes or other skin cell types to promote disease pathogenesis.

publication date

  • May 14, 2010

Research

keywords

  • Biomarkers
  • Langerhans Cells
  • Psoriasis
  • TNF-Related Apoptosis-Inducing Ligand

Identity

PubMed Central ID

  • PMC2910451

Scopus Document Identifier

  • 77952746286

Digital Object Identifier (DOI)

  • 10.1016/j.jaci.2010.03.018

PubMed ID

  • 20471070

Additional Document Info

volume

  • 125

issue

  • 6