Figure 4. In vitro culturing with hAMSCs-CM (condition media of hAMSCs) and hAECs-CM (condition media of hAECs) inhibits keratinocyte differentiation. (A) Histogram plots show relative mRNA levels of CK1 (Cytokeratin 1), CK10 (Cytokeratin 10), Involucrin and Filaggrin in keratinocytes grown in control medium, hAMSCs-CM and hAECs-CM. (B) Representative image (Top) and histogram plot (bottom) shows western blot analysis of involucrin protein levels relative to β-actin in keratinocytes grown in control medium, hAMSCs-CM and hAECs-CM. Note: The values are expressed as means ±SEM. ****p < 0.0001; ***p < 0.001; **p < 0.01; *p < 0.05