Fig. 6From: Periodic injections of adipose-derived stem cell sheets attenuate osteoarthritis progression in an experimental rabbit modelImmunohistochemical analysis for MMP-1. a Representative specimens 8 weeks after ACLT. Medial femoral condyles from the same individuals are shown. Brown staining = MMP-1 positive cells. Scale bars = 500 μm. b The proportion of MMP-1–positive cells (n = 6)Back to article page