Fig. 1From: Exosomes from embryonic mesenchymal stem cells alleviate osteoarthritis through balancing synthesis and degradation of cartilage extracellular matrixEstablishment and identification of ESC-MSCs. a Morphology of the ESCs (left) and induced MSCs (right). Scale bars, 500 μm. b Colony formation by ESC-MSCs. Gross view of the whole well was shown in the small image. Scale bars, 500 μm. c Surface molecular profile of the ESC-MSCs, which were negative in CD34 and CD45 expression, but positive in CD73, CD90, and CD105 expression. The dotted lines indicate isotype-matched mouse IgG Ab control staining. d Identification of osteogenic, chondrogenic and adipogenic cells by Alizarin red staining, oil red staining and Safranin O staining respectively. Scale bars, 200 μm. ESC-MSCs embryonic stem cell-derived mesenchymal stem cellsBack to article page