Effect of glycyrrhizic acid and 18β-glycyrrhetinic acid on the differentiation of human umbilical cord-mesenchymal stem cells into hepatocytes

Figure 1 Isolation of human umbilical cord-mesenchymal stem cells. Morphological observations of human umbilical cord-mesenchymal stem cells showing passage 0 (P₀) cells at day 10 and day 21 with cells migrating towards the periphery of the adherent tissue, and passage 1 (P1) and passage 2 (P2) cells with homogeneous population showing fusiform- and fibroblast-like appearance after sub-culturing. All images were taken under phase contrast at 10× magnification.