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. 2019 Feb 11;9:1761. doi: 10.1038/s41598-018-37981-x

Figure 1.

Figure 1

Microscopic views of Alizarin Red S staining of cultured human dental pulp stem cells (hDPSCs), human gingival fibroblasts (hGFs) and human foreskin fibroblasts (hFFs) cultured for 21 days with control medium (CM; AC) and osteogenic medium (OM; DF). Calcium deposits (red color) are evident in hDPSCs (D) and hFFs (F), but not in hGFs (E), cultured in OM. (G) Quantification of Alizarin Red staining as proportion of Alizarin-red-positive surface (in %). Asterisks: Mann Whitney – U/Wilcox Rank Sum Test, *p < 0.05; **p < 0.01. Colour of asterisks onto each column indicates the column used for the comparison. Abbreviations: CM, control medium; hDPSCs, human dental pulp stem cells; hFF, human foreskin fibroblasts; hGF, human gingival fibroblasts; OM, osteogenic medium. Scale bars: 100 μm.