Figure 1. Upregulation of HDAC6 in mouse knees and chondrocytes. (A, B) Typical Safranin O staining of the cartilage and subchondral cortical bone in each group of mice, scale bar = 200 μm, scale bar (enlarged) = 50 μm. (C, D) IF staining and quantification of the changes in HDAC6 in control and OA mice, scale bar = 50 μm, scale bar (enlarged) = 10 μm. (E, F) Western blotting and quantification of HDAC6 in chondrocytes subjected to different concentrations of TBHP for 12 hours. (G, H) Western blotting and quantification of HDAC6 in chondrocytes subjected to 50 μM of TBHP in a time-dependent manner. N = 5, GAPDH was the loading control, significance: *P<0.05, **P<0.01, ***P<0.001.