title: 4-1BB ligand stimulation enhances myeloid dendritic cell maturation from human umbilical cord blood CD34+ progenitor cells.
abstract: In humans, at least two subsets of dendritic cells (DCs) are identified on the basis of differential surface expression of CD11c antigens. CD11c(+) and CD11c(-) cells are respectively of myeloid and lympholoid origin and functionally distinct, eliciting inflammatory and tolerant T cell responses. We investigated whether 4-1BB ligand (4-1BBL), a member of the tumor necrosis factor (TNF) family, is involved in the maturation process to mature myeloid DCs during in vitro DC differentiation from immature DCs derived from human umbilical cord blood (CB) CD34(+) progenitor cells. Enhanced levels of CD11c as well as immunostimulatory molecules such as CD86, MHC class II, and 4-1BBL were induced in response to 4-1BBL stimulation. These changes were accompanied by noticeable morphological transition from nonadherent to adherent myeloid-like DCs. Stimulation of 4-1BBL on DCs with 4-1BB-Fc or with 4-1BB-transfected Jurkat cells resulted in acquisition of capacity for the immature DCs to produce interleukin-12 (IL-12). This suggests that 4-1BBL may be an important mediator for maturation of CD11c(+) myeloid DCs, information of possible relevance for the design of DC-based vaccines with enhanced activity.
authors.affiliation: Department of Microbiology and Immunology, Walther Oncology Center, Indiana University School of Medicine, Indianapolis, IN 46202-5254, USA.
authors.forename: Young-June
authors.initials: YJ
authors.lastname: Kim
authors.forename: Geling
authors.initials: G
authors.lastname: Li
authors.forename: Hal E
authors.initials: HE
authors.lastname: Broxmeyer
mesh_terms: D053330:4-1BB Ligand; D015703:Antigens, CD; D018952:Antigens, CD34; D039521:CD11c Antigen / Q000032:analysis; D002448:Cell Adhesion; D002454:Cell Differentiation; D003713:Dendritic Cells / Q000166:cytology*; D005312:Fetal Blood / Q000166:cytology; D006412:Hematopoietic Stem Cells / Q000166:cytology*; D006801:Humans; D018664:Interleukin-12 / Q000096:biosynthesis; D022423:Myeloid Cells / Q000166:cytology; D017475:Receptors, Nerve Growth Factor / Q000502:physiology; D018124:Receptors, Tumor Necrosis Factor / Q000502:physiology; D053261:Tumor Necrosis Factor Receptor Superfamily, Member 9; D014409:Tumor Necrosis Factor-alpha / Q000378:metabolism / Q000502:physiology*
chemical_list: D053330:4-1BB Ligand; D015703:Antigens, CD; D018952:Antigens, CD34; D039521:CD11c Antigen; D017475:Receptors, Nerve Growth Factor; D018124:Receptors, Tumor Necrosis Factor; C505714:TNFRSF9 protein, human; C505974:TNFSF9 protein, human; D053261:Tumor Necrosis Factor Receptor Superfamily, Member 9; D014409:Tumor Necrosis Factor-alpha; D018664:Interleukin-12