title: Chemerin expression marks early psoriatic skin lesions and correlates with plasmacytoid dendritic cell recruitment.
abstract: Psoriasis is a type I interferon-driven T cell-mediated disease characterized by the recruitment of plasmacytoid dendritic cells (pDC) into the skin. The molecules involved in pDC accumulation in psoriasis lesions are unknown. Chemerin is the only inflammatory chemotactic factor that is directly active on human blood pDC in vitro. The aim of this study was to evaluate the role of the chemerin/ChemR23 axis in the recruitment of pDC in psoriasis skin. Prepsoriatic skin adjacent to active lesions and early lesions were characterized by a strong expression of chemerin in the dermis and by the presence of CD15(+) neutrophils and CD123(+)/BDCA-2(+)/ChemR23(+) pDC. Conversely, skin from chronic plaques showed low chemerin expression, segregation of neutrophils to epidermal microabscesses, and few pDC in the dermis. Chemerin expression was localized mainly in fibroblasts, mast cells, and endothelial cells. Fibroblasts cultured from skin of psoriatic lesions expressed higher levels of chemerin messenger RNA and protein than fibroblasts from uninvolved psoriatic skin or healthy donors and promoted pDC migration in vitro in a chemerin-dependent manner. Therefore, chemerin expression specifically marks the early phases of evolving skin psoriatic lesions and is temporally strictly associated with pDC. These results support a role for the chemerin/ChemR23 axis in the early phases of psoriasis development.
authors.affiliation: Istituto Dermopatico dell'Immacolata, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), 00167 Rome, Italy.
authors.forename: Cristina
authors.initials: C
authors.lastname: Albanesi
authors.forename: Claudia
authors.initials: C
authors.lastname: Scarponi
authors.forename: Sabatino
authors.initials: S
authors.lastname: Pallotta
authors.forename: Roberta
authors.initials: R
authors.lastname: Daniele
authors.forename: Daniela
authors.initials: D
authors.lastname: Bosisio
authors.forename: Stefania
authors.initials: S
authors.lastname: Madonna
authors.forename: Paola
authors.initials: P
authors.lastname: Fortugno
authors.forename: Safiyè
authors.initials: S
authors.lastname: Gonzalvo-Feo
authors.forename: Jean-Denis
authors.initials: JD
authors.lastname: Franssen
authors.forename: Marc
authors.initials: M
authors.lastname: Parmentier
authors.forename: Ornella
authors.initials: O
authors.lastname: De Pità
authors.forename: Giampiero
authors.initials: G
authors.lastname: Girolomoni
authors.forename: Silvano
authors.initials: S
authors.lastname: Sozzani
mesh_terms: D000328:Adult; D000911:Antibodies, Monoclonal / Q000276:immunology / Q000494:pharmacology; D015703:Antigens, CD / Q000378:metabolism; D015153:Blotting, Western; D002117:Calcitriol / Q000494:pharmacology; D018414:CD8-Positive T-Lymphocytes / Q000166:cytology / Q000187:drug effects / Q000378:metabolism; D002478:Cells, Cultured; D054357:Chemokine CXCL10 / Q000235:genetics / Q000378:metabolism; D018925:Chemokines / Q000235:genetics / Q000378:metabolism; D002634:Chemotaxis, Leukocyte / Q000187:drug effects / Q000502:physiology; D017077:Culture Media, Conditioned / Q000494:pharmacology; D003713:Dendritic Cells / Q000166:cytology / Q000378:metabolism; D003876:Dermatitis, Atopic / Q000235:genetics / Q000378:metabolism / Q000473:pathology; D048049:Extracellular Signal-Regulated MAP Kinases / Q000378:metabolism; D005347:Fibroblasts / Q000166:cytology / Q000187:drug effects / Q000378:metabolism; D015870:Gene Expression / Q000187:drug effects; D018799:Intercellular Adhesion Molecule-1 / Q000378:metabolism; D036341:Intercellular Signaling Peptides and Proteins; D037181:Lectins, C-Type / Q000235:genetics / Q000378:metabolism; D008562:Membrane Glycoproteins / Q000235:genetics / Q000378:metabolism; D009504:Neutrophils / Q000166:cytology / Q000187:drug effects / Q000378:metabolism; D011565:Psoriasis / Q000235:genetics / Q000378:metabolism / Q000473:pathology; D019707:Receptors, Chemokine / Q000235:genetics / Q000276:immunology / Q000378:metabolism; D011971:Receptors, Immunologic / Q000235:genetics / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction; D012867:Skin / Q000378:metabolism / Q000473:pathology; D014212:Tretinoin / Q000494:pharmacology; D006801:Humans
chemical_list: D000911:Antibodies, Monoclonal; D015703:Antigens, CD; D002117:Calcitriol; D054357:Chemokine CXCL10; D018925:Chemokines; C443299:CLEC4C protein, human; C102741:CMKLR1 protein, human; D017077:Culture Media, Conditioned; C114753:CXCL10 protein, human; D048049:Extracellular Signal-Regulated MAP Kinases; D018799:Intercellular Adhesion Molecule-1; D036341:Intercellular Signaling Peptides and Proteins; D037181:Lectins, C-Type; D008562:Membrane Glycoproteins; C478630:RARRES2 protein, human; D019707:Receptors, Chemokine; D011971:Receptors, Immunologic; D014212:Tretinoin