title: Dendritic cell maturation overrules H-2D-mediated natural killer T (NKT) cell inhibition: critical role for B7 in CD1d-dependent NKT cell interferon gamma production.
abstract: Given the broad expression of H-2 class Ib molecules on hematopoietic cells, antigen presentation pathways among CD1d expressing cells might tightly regulate CD1d-restricted natural killer T (NKT) cells. Bone marrow-derived dendritic cells (BM-DCs) and not adherent splenocytes become capable of triggering NK1.1(+)/T cell receptor (TCR)(int) hepatic NKT cell activation when (a) immature BM-DCs lack H-2D(b)-/- molecules or (b) BM-DCs undergo a stress signal of activation. In such conditions, BM-DCs promote T helper type 1 predominant CD1d-restricted NKT cell stimulation. H-2 class Ia-mediated inhibition involves more the direct H-2D(b) presentation than the indirect Qa-1(b) pathway. Such inhibition can be overruled by B7/CD28 interactions and marginally by CD40/CD40L or interleukin 12. These data point to a unique regulatory role of DCs in NKT cell innate immune responses and suggest that H-2 class Ia and Ib pathways differentially control NKT cell recognition of DC antigens.
authors.affiliation: Unité d'Immunologie, Département de Biologie Clinique, Institut Gustave Roussy, 94805 Villejuif Cedex, France.
authors.forename: Y
authors.initials: Y
authors.lastname: Ikarashi
authors.forename: R
authors.initials: R
authors.lastname: Mikami
authors.forename: A
authors.initials: A
authors.lastname: Bendelac
authors.forename: M
authors.initials: M
authors.lastname: Terme
authors.forename: N
authors.initials: N
authors.lastname: Chaput
authors.forename: M
authors.initials: M
authors.lastname: Terada
authors.forename: T
authors.initials: T
authors.lastname: Tursz
authors.forename: E
authors.initials: E
authors.lastname: Angevin
authors.forename: F A
authors.initials: FA
authors.lastname: Lemonnier
authors.forename: H
authors.initials: H
authors.lastname: Wakasugi
authors.forename: L
authors.initials: L
authors.lastname: Zitvogel
mesh_terms: D000818:Animals; D000941:Antigens / Q000235:genetics / Q000276:immunology; D018949:Antigens, CD1 / Q000235:genetics / Q000276:immunology*; D055610:Antigens, CD1d; D000950:Antigens, Ly; D000954:Antigens, Surface; D018122:B7-1 Antigen / Q000276:immunology*; D001854:Bone Marrow Cells / Q000166:cytology / Q000276:immunology; D018106:CD28 Antigens / Q000276:immunology; D002454:Cell Differentiation; D002478:Cells, Cultured; D003713:Dendritic Cells / Q000166:cytology / Q000276:immunology*; D005260:Female; D006183:H-2 Antigens / Q000235:genetics / Q000276:immunology*; D064532:Histocompatibility Antigen H-2D; D007371:Interferon-gamma / Q000096:biosynthesis*; D007694:Killer Cells, Natural / Q000276:immunology*; D037181:Lectins, C-Type; D051379:Mice; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D055651:NK Cell Lectin-Like Receptor Subfamily B; D011506:Proteins / Q000235:genetics / Q000276:immunology; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000276:immunology; D015398:Signal Transduction / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D000941:Antigens; D018949:Antigens, CD1; D055610:Antigens, CD1d; D000950:Antigens, Ly; D000954:Antigens, Surface; D018122:B7-1 Antigen; D018106:CD28 Antigens; D006183:H-2 Antigens; D064532:Histocompatibility Antigen H-2D; C527211:Klrb1c protein, mouse; D037181:Lectins, C-Type; D055651:NK Cell Lectin-Like Receptor Subfamily B; D011506:Proteins; D016693:Receptors, Antigen, T-Cell, alpha-beta; D007371:Interferon-gamma