Fig. 4

A NPMSCs before transfection (magnification, × 200); B Recombinant NPMSCs after transfection (magnification, × 200); C Cell proliferation of NPMSCs in three groups at days 1, 4, and 7, respectively (P < 0.01); D qRT-PCR results: mRNA levels of KRT8, KRT18, and KRT19 significantly increased in the transfection group compared to the other two groups (P < 0.01). E WB detected the protein levels of KRT8, KRT19, and KRT19 in the three groups. F WB results: protein levels of KRT8, KRT18, and KRT19 significantly increased in the transfection group compared to the other two groups (P < 0.01)