title: Dynamics of dendritic cell phenotype and interactions with CD4+ T cells in airway inflammation and tolerance.
abstract: An emerging concept is that different types of dendritic cells (DCs) initiate different immune outcomes, such as tolerance vs inflammation. In this study, we have characterized the DCs from the lung draining lymph nodes of mice immunized for allergic airway inflammation or tolerance and examined their interactions with CD4(+) T cells. The DC population derived from tolerized mice was predominantly CD11c(+), B220(+), Gr-1(+), CD11b(-), and MHC class II(low), which resembled plasmacytoid-type DCs whereas DCs from the inflammatory condition were largely CD11c(+), B220(-), Gr-1(-), CD11b(+), and MHC class II(high) resembling myeloid-type DCs. The DCs from the tolerogenic condition were poor inducers of T cell proliferation. DCs from both conditions induced T cell IL-4 production but the T cells cultured with tolerogenic DCs were unresponsive to IL-4 as indicated by inhibition of STAT6 activation and expression of growth factor-independent 1, which has been recently shown to be important for STAT6-activated Th2 cell expansion. Our data suggest that airway tolerance vs inflammation is determined by the DC phenotype in lung draining lymph nodes.
authors.affiliation: Division of Pulmonary, Allergy, and Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA.
authors.forename: Timothy B
authors.initials: TB
authors.lastname: Oriss
authors.forename: Marina
authors.initials: M
authors.lastname: Ostroukhova
authors.forename: Carole
authors.initials: C
authors.lastname: Seguin-Devaux
authors.forename: Barbara
authors.initials: B
authors.lastname: Dixon-McCarthy
authors.forename: Donna B
authors.initials: DB
authors.lastname: Stolz
authors.forename: Simon C
authors.initials: SC
authors.lastname: Watkins
authors.forename: Brendan
authors.initials: B
authors.lastname: Pillemer
authors.forename: Prabir
authors.initials: P
authors.lastname: Ray
authors.forename: Anuradha
authors.initials: A
authors.lastname: Ray
mesh_terms: D000281:Administration, Intranasal; D000818:Animals; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology* / Q000378:metabolism; D002450:Cell Communication / Q000276:immunology*; D002469:Cell Separation; D002478:Cells, Cultured; D002772:Cholera Toxin / Q000008:administration & dosage / Q000276:immunology; D018920:Coculture Techniques; D003713:Dendritic Cells / Q000276:immunology* / Q000378:metabolism* / Q000648:ultrastructure; D007108:Immune Tolerance; D016130:Immunophenotyping; D007249:Inflammation / Q000276:immunology / Q000473:pathology; D008168:Lung / Q000276:immunology* / Q000473:pathology* / Q000648:ultrastructure; D008198:Lymph Nodes / Q000276:immunology / Q000473:pathology; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D008822:Mice, Transgenic; D010047:Ovalbumin / Q000008:administration & dosage / Q000276:immunology
chemical_list: D010047:Ovalbumin; D002772:Cholera Toxin