title: CD2+/CD14+ monocytes rapidly differentiate into CD83+ dendritic cells.
abstract: Since denditric cells (DC) represent the main players linking innate and adaptive immunity, their prompt generation from blood cells would be instrumental for an efficient immune response to infections. Consistent with this, CD2+ monocytes were found to express the DC maturation marker CD83, along with acquisition of high antigen-presenting activity, after a surprisingly short time in culture. This rapid process is associated with expression of IFN-alpha/beta genes and secretion of low levels of pro-inflammatory cytokines. Exposure of monocytes to IFN-alpha, but not to IL-4, induced persistence of CD2+/CD83+ cells, which were fully competent in stimulating primary responses by naive T cells. These results unravel the natural pathway by which infection-induced signals rapidly transform pre-armed monocytes into active DC.
authors.affiliation: Laboratory of Virology, Istituto Superiore di Sanità, Rome, Italy.
authors.forename: Tiziana
authors.initials: T
authors.lastname: Di Pucchio
authors.forename: Caterina
authors.initials: C
authors.lastname: Lapenta
authors.forename: Stefano Maria
authors.initials: SM
authors.lastname: Santini
authors.forename: Mariantonia
authors.initials: M
authors.lastname: Logozzi
authors.forename: Stefania
authors.initials: S
authors.lastname: Parlato
authors.forename: Filippo
authors.initials: F
authors.lastname: Belardelli
mesh_terms: D017951:Antigen Presentation; D015703:Antigens, CD; D018801:CD2 Antigens / Q000096:biosynthesis* / Q000235:genetics; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology; D002454:Cell Differentiation; D016207:Cytokines / Q000378:metabolism; D003713:Dendritic Cells / Q000145:classification* / Q000187:drug effects / Q000276:immunology / Q000378:metabolism; D005786:Gene Expression Regulation / Q000187:drug effects; D015488:HIV Antigens / Q000276:immunology; D015497:HIV-1 / Q000276:immunology; D006801:Humans; D007136:Immunoglobulins / Q000096:biosynthesis* / Q000235:genetics; D007370:Interferon Type I / Q000096:biosynthesis / Q000378:metabolism; D016898:Interferon-alpha / Q000494:pharmacology; D015847:Interleukin-4 / Q000494:pharmacology; D018950:Lipopolysaccharide Receptors / Q000096:biosynthesis* / Q000235:genetics; D007959:Lymphocyte Culture Test, Mixed; D008562:Membrane Glycoproteins / Q000096:biosynthesis* / Q000235:genetics; D009000:Monocytes / Q000166:cytology / Q000187:drug effects*; D000097802:CD83 Antigen
chemical_list: D015703:Antigens, CD; D018801:CD2 Antigens; D016207:Cytokines; D015488:HIV Antigens; D007136:Immunoglobulins; D007370:Interferon Type I; D016898:Interferon-alpha; D015847:Interleukin-4; D018950:Lipopolysaccharide Receptors; D008562:Membrane Glycoproteins; D000097802:CD83 Antigen