Figure 1From: Adipose-derived mesenchymal stem cells from the sand rat: transforming growth factor beta and 3D co-culture with human disc cells stimulate proteoglycan and collagen type I rich extracellular matrixOsteogenic differentiation of adipose-derived mesenchymal stem cells (AD-MSC). (a) and (b) AD-MSC treated with osteogenic media for three weeks stained with Alizarin red. Red staining marks mineralised matrix produced by osteoblasts. A at × 4 magnification; (b) at × 105 magnification. (c) High density cultures showed formation of a chondrogenic phenotype when cultured in micromass; pink extracellular matrix staining marks proteoglycans stained with toluidine blue × 95.Back to article page