title: Regulation of GM-CSF-induced dendritic cell development by TGF-beta1 and co-developing macrophages.
abstract: Using a culture system of bone marrow progenitor cells with GM-CSF and TGF-beta1, a study was performed to analyze the effect of TGF-beta1 on the development of dendritic cells (DC) and to elucidate the regulatory role of macrophages co-developing with dendritic cells. The results demonstrate that DC generated in the presence of TGF-beta1 were immature with respect to the expression of CD86, nonspecific esterase activity and cell shape. Such inhibitory effects of TGF-beta1 were dependent on FcR+ macrophages, which were depleted by panning. TGF-beta1 did not appear to inhibit the commitment of progenitor cells to the DC lineage. In addition, TGF-beta1 also acted directly on the intermediate stage of DC to prevent their over-maturation, which results in a preferential decrease in MHC class II, but not in CD86, in the presence of TNF-alpha. FcR+ suppressive macrophages were also shown to facilitate DC maturation when stimulated via FcR-mediated signals even in the presence of TGF-beta1. These results indicate that TGF-beta1 indirectly and directly regulate the development of DC and that co-developing macrophages have a regulatory role in DC maturation.
authors.affiliation: Pharmaceutical Research Laboratory, Kirin Brewery Co., Ltd., Takasaki, Gunma, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Yamaguchi
mesh_terms: D000818:Animals; D015703:Antigens, CD / Q000096:biosynthesis; D051940:B7-2 Antigen; D001854:Bone Marrow Cells / Q000737:chemistry; D002450:Cell Communication; D002454:Cell Differentiation / Q000276:immunology*; D048429:Cell Size; D002478:Cells, Cultured; D003713:Dendritic Cells / Q000166:cytology / Q000187:drug effects* / Q000201:enzymology / Q000276:immunology; D004950:Esterases / Q000378:metabolism; D005260:Female; D005434:Flow Cytometry; D016178:Granulocyte-Macrophage Colony-Stimulating Factor / Q000502:physiology*; D007150:Immunohistochemistry; D008233:Lymphotoxin-alpha / Q000494:pharmacology*; D008264:Macrophages / Q000378:metabolism*; D008562:Membrane Glycoproteins / Q000096:biosynthesis; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D008811:Mice, Inbred DBA
chemical_list: D015703:Antigens, CD; D051940:B7-2 Antigen; C497965:Cd86 protein, mouse; D008233:Lymphotoxin-alpha; D008562:Membrane Glycoproteins; D016178:Granulocyte-Macrophage Colony-Stimulating Factor; D004950:Esterases