title: A novel CD4-CD8alpha+CD205+CD11b- murine spleen dendritic cell line: establishment, characterization and functional analysis in a model of vaccination to toxoplasmosis.
abstract: Dendritic cells (DCs) play an essential role in the induction of immune responses to pathogen infections. Native DCs are difficult to obtain in large numbers and consequently the vast majority of DCs employed in all experiments are derived from bone marrow progenitors. In an attempt to solve this problem, we have established a novel CD8alpha(+) DC line (H-2(k)) from spleen, which we have named SRDC line, and which is easy to culture in vitro. These cells display similar morphology, phenotype and activity to CD4(-)CD8alpha(+)CD205(+)CD11b(-) DCs purified ex vivo. Toxoplasma gondii antigen was shown to be taken up by these cells and to increase class I and class II major histocompatibility complex (MHC), CD40, CD80 and CD86 surface expression. We report that vaccination with T. gondii antigen-pulsed SRDCs, which synthesize large amounts of interleukin-12, induced protective immune responses against this intracellular pathogen in syngeneic CBA/J mice. This protection was associated with strong cellular and humoral immune responses at systemic and intestinal levels. Spleen and mesenteric lymph node cell proliferations were correlated with a Th1/Th2-type response and a specific SRDC homing to spleen and intestine was observed. The SRDC or CD4(-)CD8alpha(+)CD205(+)CD11b(-) DC line can be expected to be a very useful tool for immunobiology studies of DC.
authors.affiliation: Université François-Rabelais de Tours, Tours, France.
authors.forename: Sophie
authors.initials: S
authors.lastname: Ruiz
authors.forename: Céline
authors.initials: C
authors.lastname: Beauvillain
authors.forename: Marie-Noëlle
authors.initials: MN
authors.lastname: Mévélec
authors.forename: Philippe
authors.initials: P
authors.lastname: Roingeard
authors.forename: Pascal
authors.initials: P
authors.lastname: Breton
authors.forename: Daniel
authors.initials: D
authors.lastname: Bout
authors.forename: Isabelle
authors.initials: I
authors.lastname: Dimier-Poisson
mesh_terms: D000818:Animals; D015703:Antigens, CD / Q000378:metabolism; D000953:Antigens, Protozoan / Q000276:immunology; D039481:CD11b Antigen / Q000378:metabolism; D015704:CD4 Antigens / Q000378:metabolism; D016827:CD8 Antigens / Q000378:metabolism; D002460:Cell Line; D003713:Dendritic Cells / Q000276:immunology* / Q000378:metabolism / Q000469:parasitology*; D037181:Lectins, C-Type / Q000378:metabolism; D051379:Mice; D008808:Mice, Inbred CBA; D015778:Minor Histocompatibility Antigens; D016052:Protozoan Vaccines / Q000008:administration & dosage* / Q000276:immunology; D011956:Receptors, Cell Surface / Q000378:metabolism; D013154:Spleen / Q000166:cytology; D014122:Toxoplasma / Q000276:immunology*; D014123:Toxoplasmosis / Q000276:immunology* / Q000517:prevention & control; D014611:Vaccination
chemical_list: D015703:Antigens, CD; D000953:Antigens, Protozoan; D039481:CD11b Antigen; D015704:CD4 Antigens; D016827:CD8 Antigens; C093569:DEC-205 receptor; D037181:Lectins, C-Type; D015778:Minor Histocompatibility Antigens; D016052:Protozoan Vaccines; D011956:Receptors, Cell Surface