Efficacy of serum-free cultured human umbilical cord mesenchymal stem cells in the treatment of knee osteoarthritis in mice

Figure 7 Western bolt. A: Western bolt original picture; B: The model control group had the lowest expression level of collagen II, while the blank control group had the highest expression level; C: The model control group had the highest expression level of matrix metalloproteinase-1, while the blank control group had the lowest expression level; D: The model control group had the highest expression level of matrix metalloproteinase-13, while the blank control group had the lowest expression level. ^bP < 0.01, comparison with the sham-operated group; ^cP < 0.05, comparison with the modeled control. MMP: Matrix metalloproteinase; N-hUCMSCs: Serum-free human umbilical cord mesenchymal stems; S-hUCMSCs: Serum-cultured human umbilical cord mesenchymal stem cells.