Research Article

Cell-to-Cell Culture Inhibits Dedifferentiation of Chondrocytes and Induces Differentiation of Human Umbilical Cord-Derived Mesenchymal Stem Cells

Figure 4

Quantitative gene expression levels for SOX9 mixed culture with chondrocytes at a ratio of 1 : 1 for 14 days, 21 days, and 28 days, respectively. Undifferentiated hUC-MSCs were also cultured as monolayers and used as a control. ; .