Fig. 2
The determination of TNF-α and triptolide concentrations. (A, B, C) CCK-8 assay demonstrated the proliferation of hPDLSCs treated for 1 (A), 3 (B), 5 (C) days with control, TNF-α (10, 20ng/ml) or triptolide (10− 9M, 10− 10M, 10− 11M, 10− 12M). (D) The growth curves of the control, TNF-α or triptolide treated at different concentration on day 1, 3, 5. (E) ALP activity under control, TNF-α (5, 10, 20ng/ml) or/and triptolide (10− 9M, 10− 10M, 10− 11M, 10− 12M) treatment