Figure 4. Effect of TGF-β1 on the growth of SHED. (A) Number of viable SHED after exposure to TGF-β1 for 5 days as estimated by MTT assay. Results were expressed as cell viability (% of control, Mean ± SE). (B) Effect of SB431542 on the TGF-β1-induced growth of SHED as analyzed by MTT assay. (C) Effect of 5z-7oxozeaenol on the TGF-β1-induced growth of SHED as analyzed by MTT assay. (D) Effect of U0126 on the TGF-β1-induced growth of SHED as analyzed by MTT assay. (E) Effect of SB203580 on the TGF-β1-induced growth of SHED as analyzed by MTT assay. *Denotes statistically significant difference when compared to control, #denotes statistically significant difference when compared with TGF-β1 (5 ng/ml)-treated group.