title: Intrinsic characteristics of contact and respiratory allergens influence production of polarizing cytokines by dendritic cells.
abstract: Type 1 and type 2 cytokines are primary mediators in contact allergy and aeroallergen-mediated disorders, respectively. For both types of disease, dendritic cells (DCs) are pivotal in initiating immune hyperresponsiveness. We studied whether contact and respiratory allergens possess intrinsic capacities to polarize DC towards DC1 and DC2 functions, independent of environmental factors. Human monocyte-derived DCs were exposed to the positive controls [type 1: lipopolysaccharide (LPS) + interferon-gamma; type 2: LPS + prostaglandin E(2)], contact allergens [2,4-dinitrochlorobenzene (DNCB), oxazolone (OXA), and nickel sulfate (NiSO(4))], and respiratory allergens [trimellitic anhydride (TMA) and the protein allergen derived from Dermatophagoides pteronyssinus (Der p1)]. The polarizing potentials of the allergens on DCs were determined by the secretion of type 1 [tumour necrosis factor-alpha (TNF-alpha), CXCL10, and interleukin (IL)-12p70] and type 2 (IL-10) cytokines. The contact allergens, DNCB and OXA, induced strict type 1 DC polarization, whereas the respiratory allergens, TMA and Der p1, showed strict type 2 DC polarization. The contact allergen, NiSO(4), induced both DC1 (TNF-alpha and CXCL10 production) and DC2 (decreased IL-12p70/IL-10 ratio) features. These results support the view that allergens have an intrinsic capacity to skew immune responses at the DC level, irrespective of local factors such as those determined by cutaneous or mucosal epithelial microenvironments.
authors.affiliation: Department of Dermatology, VU University Medical Centre, Amsterdam, The Netherlands.
authors.forename: Mascha J
authors.initials: MJ
authors.lastname: Toebak
authors.forename: Heleen
authors.initials: H
authors.lastname: Moed
authors.forename: Mary B E
authors.initials: MB
authors.lastname: von Blomberg
authors.forename: Derk P
authors.initials: DP
authors.lastname: Bruynzeel
authors.forename: Susan
authors.initials: S
authors.lastname: Gibbs
authors.forename: Rik J
authors.initials: RJ
authors.lastname: Scheper
authors.forename: Thomas
authors.initials: T
authors.lastname: Rustemeyer
mesh_terms: D000485:Allergens / Q000276:immunology / Q000494:pharmacology*; D054357:Chemokine CXCL10; D019743:Chemokines, CXC / Q000096:biosynthesis; D016207:Cytokines / Q000096:biosynthesis*; D003713:Dendritic Cells / Q000187:drug effects / Q000276:immunology / Q000378:metabolism*; D017449:Dermatitis, Allergic Contact / Q000276:immunology*; D004797:Enzyme-Linked Immunosorbent Assay; D006801:Humans; D018664:Interleukin-12 / Q000096:biosynthesis; D008070:Lipopolysaccharides; D012130:Respiratory Hypersensitivity / Q000276:immunology*; D014409:Tumor Necrosis Factor-alpha / Q000096:biosynthesis
chemical_list: D000485:Allergens; D054357:Chemokine CXCL10; D019743:Chemokines, CXC; D016207:Cytokines; D008070:Lipopolysaccharides; D014409:Tumor Necrosis Factor-alpha; D018664:Interleukin-12