Fig. 4

TLR4 and TLR2 mRNA expression in hDPSCs elicited by E. coli or P. gingivalis LPS. Cells are motivated by E. coli or P. gingivalis LPS (1 μg/mL). Cells without LPS stimulus serve as the control group. TLR4 and TLR2 on mRNA levels at A 1.5 h, B 3 h. C 6 h, D 12 h, and E 24 h. Data are shown as mean ± SD (n = 3). *p < 0.05, **p < 0.01, ***p < 0.001