Bone marrow-derived progenitor cells were isolated from femurs, tibiae and hip bones of non-transgenic C57BL/6J mice according to established protocols (30 (link)). Progenitor cells were cultivated in RPMI-1640 with 10% (v/v) FBS (heat-inactivated), GlutaMAX supplement (1:100 from stock, Gibco, Thermo Scientific), 50 μM β-mercaptoethanol (Sigma) and 200 U/ml murine Granulocyte-Macrophage Colony-Stimulating Factor (GM-CSF, PeproTech) at 0.2 Mio. cells/ml. After 9 days of incubation at 37°C and 5% CO2, progenitor cells completely differentiated into immature bone marrow-derived dendritic cells (BM-DCs).
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