title: In the absence of a CD40 signal, B cells are tolerogenic.
abstract: When B cells are deprived of signaling through CD40, they exhibit the ability to induce T cell tolerance. The in vivo administration of anti-gp39 and allogeneic B cells diminished the ability of mice to mount an allogeneic response. Tolerance induction was specific for the haplotype expressed on the allogeneic B cells. Selective allospecific unresponsiveness was induced in the CD8 and CD4 compartments by the administration of anti-gp39 and class II-deficient B cells or class I-deficient B cells, respectively. As predicted by studies with anti-gp39 treatment, diminished allospecific responsiveness was induced by the administration of B cells to mice genetically deficient in gp39. Taken together, these data are consistent with the premise that deprivation of CD40 signaling engenders B cells with enhanced tolerogenicity. These studies provide insights into the tolerogenic capacity of resting B cells and outlines a practical approach to exploit this function.
authors.affiliation: Department of Microbiology, Dartmouth Medical School, Lebanon, New Hampshire 03756, USA.
authors.forename: J E
authors.initials: JE
authors.lastname: Buhlmann
authors.forename: T M
authors.initials: TM
authors.lastname: Foy
authors.forename: A
authors.initials: A
authors.lastname: Aruffo
authors.forename: K M
authors.initials: KM
authors.lastname: Crassi
authors.forename: J A
authors.initials: JA
authors.lastname: Ledbetter
authors.forename: W R
authors.initials: WR
authors.lastname: Green
authors.forename: J C
authors.initials: JC
authors.lastname: Xu
authors.forename: L D
authors.initials: LD
authors.lastname: Shultz
authors.forename: D
authors.initials: D
authors.lastname: Roopesian
authors.forename: R A
authors.initials: RA
authors.lastname: Flavell
mesh_terms: D000818:Animals; D000906:Antibodies / Q000494:pharmacology; D000911:Antibodies, Monoclonal / Q000276:immunology; D015703:Antigens, CD / Q000276:immunology*; D000944:Antigens, Differentiation, B-Lymphocyte / Q000276:immunology*; D001402:B-Lymphocytes / Q000187:drug effects / Q000276:immunology*; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology; D019013:CD40 Antigens; D023201:CD40 Ligand; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology; D005260:Female; D006087:Graft vs Host Reaction / Q000276:immunology; D015395:Histocompatibility Antigens Class I / Q000276:immunology; D000949:Histocompatibility Antigens Class II / Q000276:immunology; D007108:Immune Tolerance / Q000276:immunology*; D008070:Lipopolysaccharides / Q000494:pharmacology; D007959:Lymphocyte Culture Test, Mixed; D008562:Membrane Glycoproteins / Q000276:immunology; D051379:Mice; D008815:Mice, Inbred Strains; D018345:Mice, Knockout; D015398:Signal Transduction / Q000276:immunology*; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology
chemical_list: D000906:Antibodies; D000911:Antibodies, Monoclonal; D015703:Antigens, CD; D000944:Antigens, Differentiation, B-Lymphocyte; D019013:CD40 Antigens; D015395:Histocompatibility Antigens Class I; D000949:Histocompatibility Antigens Class II; D008070:Lipopolysaccharides; D008562:Membrane Glycoproteins; D023201:CD40 Ligand