2,500 cells/cm2 and expanded until cells reached 90% confluency.
For adipogenic, osteogenic, and chondrogenic differentiation, hADSCs were
stimulated for 28, 21 and 14 days in differentiation media (GIBCO, Grand Island,
NY, USA) according to manufacturer’s instructions. Adipogenic, osteogenic, and
chondrogenic differentiation were assessed by staining for Oil red O, Alizarin
Red S and Safranin O, respectively.
Immunophenotype of hADSCs was carried out using flow cytometry for the following
markers: SSEA-4 (MAB4304, Merck-Millipore, Darmstadt, Germany), CD34 (ab81289,
Abcam), CD90 (#561970, BD Pharmingen, San Diego, CA, USA), CD105 (MCA1557,
Bio-rad, Hercules, CA, USA) and HLA-DR (ab92511, Abcam). Samples were analyzed
using a FACS Calibur-S System (BD Immunocytometry Systems, San Jose, CA, USA)
and the obtained data were analyzed with FlowJo software (FlowJo, version
7.6.1).