Fig. 4From: Cartilage progenitor cells combined with PHBV in cartilage tissue engineeringHistological and immunohistochemical staining. Haematoxylin and eosin (HE) staining showed that no cartilage structure in the BMSCs group was observed after 6 weeks of in vivo culture (a), while the formation of a typical cartilage structure was observed in the CPCs group (d) and the chondrocyte group (g). No expression of safranin-O (b) and COL II (c) was observed in the BMSC group, some cells were positive for safranin-O (e) and COL II (f) in the CPCs group, and strong positive expression of safranin-O (h) and COL II (i) was observed in the chondrocyte groupsBack to article page