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Generation of CMRF-44+ monocyte-derived dendritic cells:: Insights into phenotype and function
被引:0
作者:
Vuckovic, S
[1
]
Fearnley, DB
[1
]
Mannering, SI
[1
]
Dekker, J
[1
]
Whyte, LF
[1
]
Hart, DNJ
[1
]
机构:
[1] Christchurch Hosp, Haematol Immunol Res Grp, Christchurch, New Zealand
关键词:
dendritic cells;
antigen presentation;
CMRF-44;
CD83;
CD1a;
D O I:
暂无
中图分类号:
R5 [内科学];
学科分类号:
1002 ;
100201 ;
摘要:
The CMRF-44 monoclonal antibody (MoAb) recognizes an intermediate stage of blood dendritic cell (DC) differentiation as well as mature CD83(+) blood DC. Here we describe the use of the CMRF-44 MoAb to monitor the in vitro development of DC-like cells from peripheral blood mononuclear cells. Neither granulocyte-macrophage colony-stimulating factor (GM-CSF) nor GM-CSF plus tumor necrosis factor-alpha (TNF-alpha) supported the development of CMRF-44(+) cells. However, GM-CSF plus interleukin (IL)-4 generated a substantial number of CMRF-44(+) cells among the heterogeneous CD14(-) myeloid cell population, produced after 7 or 10 days of culture. The addition of TNF-alpha to GM-CSF+IL-4 on the fifth day of culture enhanced the generation of CMRF-44(+) cells from days 7 to 14. A concentration of 50 U/mL of IL-4 was sufficient to allow the development of CMRF-44(+) cells. The presence of GM-CSF was essential, but a wide range of concentrations (50-800 U/mL) was effective for supporting IL-4-induced generation of CMRF-44(+) cells. TNF-alpha at concentrations of 20 or 50 ng/mL induced a maximal increase in the number of CMRF-44(+) cells. The CMRF-44(+) DCs generated in the presence of GM-CSF+IL-4 were large, irregularly shaped cells with variable CD1a expression and have CD83 transcripts but no CD83 surface expression. Additional TNF-alpha treatment induced prominent dendritic processes and surface expression of CD83 on CMRF-44+ DCs. The CMRF-44+ DCs generated in GM-CSF+IL-4 showed higher allostimulatory activity than CMRF-44(-) cells but were less efficient at processing and presenting soluble antigen to T-lymphocyte lines. TNF-alpha treatment reduced antigen uptake but increased the allostimulatory activity of CMRF-44+ DCs. CMRF-44+ DC differentiation from blood CD14(+) monocytes was not radiosensitive and thus does not involve cell division. We conclude that the MoAb CMRF-44 identifies both intermediate and fully mature stages of monocyte-DC differentiation and may be a useful marker in establishing the optimal timing for antigen loading of in vitro-generated monocyte-derived DCs.
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页码:1255 / 1264
页数:10
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