title: Dendritic cells generated from human blood in granulocyte macrophage-colony stimulating factor and interleukin-7.
abstract: Dendritic cells (DC), with potentially important clinical applications, have been generated from human peripheral blood monocytes in the presence of GM-CSF and IL-4 (G4 DC). In the present report we show that DC with a novel phenotype can be generated from blood adherent mononuclear cells in the presence of GM-CSF and IL-7 (G7 DC). Adherent cells from PBMC, cultured in GM-CSF (600 U/ml) and IL-7 (6 U/ml), were transformed over 7 days into cells with DC morphology, at a yield of 1.2-1.6 x 10(6) per 10(7) PBMC. G7 DC not only expressed class I and class II MHC, CD1a, CD11c, CD23, CD40, CD54, CD58, CD80, CD86 and CD95, like G4 DC, but also CD21, which is the complement receptor type 2, a ligand for CD23 and a receptor for EBV and IFN-alpha. G7 DC were at least one log more effective in the autologous MLR and at least two logs more effective in the allogeneic MLR, than PBMC. They elicited proliferative responses of CD4 T cells to tetanus toxoid and CD8 T cells to an EBV peptide, and stronger T-cell cytotoxicity to EBV peptide than G4 DC. Expression of CD21 by G7 DC suggests that IL-7 delivers a distinct signal to DC precursors and that G7 DC may be functionally distinct.
authors.affiliation: Walter and Eliza Hall Institute of Medical Research, Royal Melbourne Hospital, Parkville, Victoria, Australia.
authors.forename: K
authors.initials: K
authors.lastname: Takahashi
authors.forename: M C
authors.initials: MC
authors.lastname: Honeyman
authors.forename: L C
authors.initials: LC
authors.lastname: Harrison
mesh_terms: D017951:Antigen Presentation; D018949:Antigens, CD1 / Q000032:analysis; D003713:Dendritic Cells / Q000187:drug effects*; D016178:Granulocyte-Macrophage Colony-Stimulating Factor / Q000494:pharmacology*; D004854:Herpesvirus 4, Human / Q000276:immunology; D006801:Humans; D015851:Interleukin-7 / Q000494:pharmacology*; D018950:Lipopolysaccharide Receptors / Q000032:analysis; D008213:Lymphocyte Activation; D017464:Receptors, Complement 3d / Q000502:physiology; D013602:T-Lymphocytes, Cytotoxic / Q000502:physiology
chemical_list: D018949:Antigens, CD1; D015851:Interleukin-7; D018950:Lipopolysaccharide Receptors; D017464:Receptors, Complement 3d; D016178:Granulocyte-Macrophage Colony-Stimulating Factor