Research Article

A Small-Sized Population of Human Umbilical Cord Blood-Derived Mesenchymal Stem Cells Shows High Stemness Properties and Therapeutic Benefit

Figure 1

Cell size distribution of UCB-MSCs. (a) UCB-MSCs were observed as spindle-like fibroblastoid cells with heterogeneity regarding shape (upper panel) and single cell (lower panel) at P5. (b) The distribution of cell size was analyzed. (c) Cell size was increased in single cells following expansion. The cells were stained with SA β-gal. (d) Based on cell growth, 10 lots of UCB-MSCs were divided into two groups showing significant differences in cumulative PD, group I (UCB#1 to #4) and group II (UCB#5 to #10). (e) Cell size and (f) the proportion of smaller cells were measured in group I and group II at early stage (P2) (, compared to group I). μm; PD: population doubling.
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