Fig. 4

Histological staining. BMSC (4-A), NsP (4-B), DPSC (4-C), AuP (4-D) cells cultured for 14 days under chondrogenic induction in normoxic and hypoxic were stained for histology. HE: Hematoxylin-Eosin, SO: Safranin O, AB: Alcian blue, MT: Masson’s trichrome. Scale bar: 500 μm