Fig. 5

Production of TLR4 and TLR2 proteins on the surface of hDPSCs by flow cytometry. Cells are stimulated with E. coli or P. gingivalis LPS (1 μg/mL) for 24 h. Cells without LPS stimulus serve as the control group. Expression levels of A–C TLR4 and D–F TLR2 on the cell surface. Red-filled or unfilled histograms refer to TLR4 and TLR2, respectively, whereas blue-filled or unfilled histograms refer to the Isotype control IgG