Fig. 7
Oln inhibits OA progression in a Fap-dependent manner. a–c Safranin O/Fast Green staining in control, Oln KO and Oln/Fap double KO mouse knee joints 8 weeks after DMM surgery. DMM surgery was performed in 10-week-old mice. Representative cartilage erosion (a, top: femur, bottom: tibia), subchondral bone thickening (b) and synovitis (c) images are shown (n = 7–9 mice per genotype). Yellow dotted lines indicate the subchondral bone plate. Arrows indicate the synovium. Scale bars: 100 μm. d–f Quantification of the OARSI score (d), subchondral bone thickness (e) and synovitis score (f). g, h Immunostaining of Col II in the knee joints (g) with quantification (h) (n = 6 mice per genotype). DAPI staining indicates the nucleus. Scale bars: 100 μm. The statistical significance was assessed using one-way ANOVAs with Tukey’s multiple comparison tests. Data are presented as the mean ± SD (*P < 0.05, **P < 0.01, ***P < 0.001)
