Figure 2. Morphology of the dorsal skin keratinocytes (DSKs), mesenchymal stromal cells (MSCs), partially differentiated MSC (PMSCs) and CD71 positive PMSC population (PMSC_CD71+). A. DSKs exhibited a typical cobblestone appearance. B. MSC typical spindle-shape form changed into a polygonal cobblestone-like appearance (C) after treatment with keratinocyte-conditioned medium for 14 days. D. PMSC_CD71+ cells shared keratinocyte-like appearance. Original magnification × 10.