Figure 5. Effects of SF on the expression of MMP-13 in MIA-induced OA rats. (A) The immunohistochemical staining was used to identify the expression of MMP13 in the articular cartilage. (B) Data were expressed as mean ± SD (n = 8) (*p < 0.05 MIA group vs. normal control group; ^#p < 0.05 SF+MIA treatment groups vs. MIA group).