For endothelial differentiation, CSC were plated at a density of 50.000 cells/well into 6-well culture plated coated with Endothelial Cell Attachment Factor (Sigma-Aldrich), in EndoGRO (Merck Millipore) and maintained in hypoxia (1% O2 and 5% CO2) in hypoxia chambers (Stem Cells Technologies) for 14 days, as previously described [31 (link)]. CSC-derived TEC were maintained in culture for further 20 passages without observing any loss of phenotype.
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