Fig. 3From: Attenuation of osteoarthritis progression through intra-articular injection of a combination of synovial membrane-derived MSCs (SMMSCs), platelet-rich plasma (PRP) and conditioned medium (secretome)Special staining of knee articular cartilage. Safranin O/ alcian blue staining showed more GAGs (black arrow) in treatment groups c1, e1 and f1. Immunohistochemistry for Col2 (black arrow) revealed better expression in treatment groups (c2 and f2)Back to article page