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. 2020 Jul 10;11:276. doi: 10.1186/s13287-020-01781-w

Fig. 4.

Fig. 4

a Immunohistochemical staining of COL2A1 and MMP13 proteins in the cartilage tissue. Scale bar = 50 μm. b Detection of serum inflammatory factors in OA rats by ELISA. *< 0.05, **< 0.001, ***< 0.001, compared with the sham group. #< 0.05, ###< 0.001, compared with the OA group. n = 8 for each group