title: Differential expression of major histocompatibility complex class Ia, Ib, and II molecules on monocytes-derived dendritic and macrophagic cells.
abstract: Blood monocyte derived antigen presenting cells (APC) such as dendritic cells and macrophages are considered as major promising tools for antitumoral immunotherapy. In order to contribute to their phenotype characterization, we have precisely investigated their levels of expression of MHC class Ia, Ib (HLA-G) and II molecules using mainly flow cytometry quantification assays. APC were generated from monocytes cultured for 7 days in the presence of GM-CSF and IL-4 or M-CSF. These cells, which exhibited known morphological and immunological features of dendritic cells and macrophages respectively, were evidenced to display high expression of MHC class Ia and class II antigens in comparison to that found in monocytes. Dendritic cells and macrophages thus expressed 2-fold more and 4-fold more MHC class Ia molecules and 5-fold and 3-fold more MHC class II DR molecules than parental monocytes. In addition, expression of MHC class II DP and DQ molecules, not or only barely detected in monocytes, was clearly demonstrated in the two kinds of APC. In contrast, monocytes, dendritic cells and macrophages failed to express MHC class Ib HLA-G antigen. The up-regulation in monocyte-derived APC of MHC class Ia and II molecules mediating the presentation of antigen peptides to lymphocytes fully supports the interest of such APC in antitumoral immunotherapy.
authors.affiliation: Laboratoire Universitaire d'Hématologie et de la Biologie des Cellules Sanguines (UPRES EA2233/GRI4U006B), Faculté de Médecine, Université de Rennes I, France.
authors.forename: B
authors.initials: B
authors.lastname: Laupéze
authors.forename: O
authors.initials: O
authors.lastname: Fardel
authors.forename: M
authors.initials: M
authors.lastname: Onno
authors.forename: N
authors.initials: N
authors.lastname: Bertho
authors.forename: B
authors.initials: B
authors.lastname: Drénou
authors.forename: R
authors.initials: R
authors.lastname: Fauchet
authors.forename: L
authors.initials: L
authors.lastname: Amiot
mesh_terms: D002478:Cells, Cultured; D003713:Dendritic Cells / Q000166:cytology / Q000187:drug effects / Q000276:immunology*; D016178:Granulocyte-Macrophage Colony-Stimulating Factor / Q000276:immunology / Q000494:pharmacology; D006680:HLA Antigens / Q000096:biosynthesis; D059951:HLA-G Antigens; D015395:Histocompatibility Antigens Class I / Q000096:biosynthesis*; D000949:Histocompatibility Antigens Class II / Q000096:biosynthesis*; D006801:Humans; D016130:Immunophenotyping; D015847:Interleukin-4 / Q000276:immunology / Q000494:pharmacology; D008264:Macrophages / Q000166:cytology / Q000187:drug effects / Q000276:immunology*; D009000:Monocytes / Q000166:cytology / Q000187:drug effects / Q000276:immunology*; D020298:U937 Cells
chemical_list: D006680:HLA Antigens; D059951:HLA-G Antigens; D015395:Histocompatibility Antigens Class I; D000949:Histocompatibility Antigens Class II; D015847:Interleukin-4; D016178:Granulocyte-Macrophage Colony-Stimulating Factor