Adipose-Derived Stem Cells Cocultured with Chondrocytes Promote the Proliferation of Chondrocytes

Figure 3

Stem cell marker expression in ADSCs. The stem cell markers in ADSCs were identified by specific antibody reactions with CD44 (a), CD31 (b), CD90 (c), CD34 (d), CD73 (e), and CD45 (f), respectively. More than 90% of ADSCs were positively stained by CD44 (a) and CD90 (c). However, less than 70% of ADSCs expressed CD73 (e), and less than 20% of ADSCs exhibited CD45 (f). On the other hand, very few ADSCs were positively stained by CD31 (b) and CD34 (d). The images were obtained by an inverted fluorescent microscope. Bars: 100 μm.

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