Fig. 1

Human ASCs differentiation potential. light microscopy: a morphology of undifferentiated hASCs, b hASCs after chondrogenic differentiation, chondropellet stained with Masson’s Trichrome method, collagen deposits are blue; c, d Alizarin Red staining (calcium deposits are red) of hASCs cultured in standard (c) or osteogenic medium (d); Oil Red O staining (lipid droplets are red) of hASCs cultured in standard (e) and adipogenic (f) medium. Representative data from one donor are presented. Scale bars: 50 μm (a, b, c, d); 20 μm (e, f)