Immunohistochemical analysis for MMP-1 and TNF-α in cartilage. Photomicrographs of representative specimens evaluated for MMP-1 (A) and TNF-α (B) in medial femoral condyle of OA, 4% RSA and ASC-treated groups. Data are reported as mean ± SD. Scale bars = 100 μm. Statistical values of at least P < 0.01 were observed in all the comparisons.
Desando et al. Arthritis Research & Therapy 2013 15:R22 doi:10.1186/ar4156