Morphology of adipose tissue-derived mesenchymal stem cells isolated from SJL/JCrl and C57BL/6 mice strains. Images of the C57-AdMSC and SJL-AdMSC cultures showing the morphology of the populations. Passage 0 (P0) images show cells with rounded morphology and colony growth. Images from passages 1 (P1) to 15 (P15) show that plastic-adherent C57-AdMSCs and SJL-AdMSCs have a fibroblastic morphology and expand primarily over the surface of culture dishes (original magnification 10×). Ad-MSC, adipose tissue-derived mesenchymal stem cell.