Fig. 2From: Exosomes derived from platelet-rich plasma present a novel potential in alleviating knee osteoarthritis by promoting proliferation and inhibiting apoptosis of chondrocyte via Wnt/β-catenin signaling pathwayIsolation and identification of chondrocytes: The chondrocytes were obtained from New Zealand white rabbits (4 weeks). Morphology of chondrocytes observed by inverted microscope (a, × 40 and b × 200, bar 100 μm). Identification of chondrocytes performed by Alcian blue staining (c) and immunohistochemistry staining for Col II (d), bar 50 μmBack to article page