Fig. 4.

β cells viability (%); treatment with different concentrations of growth factors (HGF, EGF, and TGF-β) and small molecules (WS6 and harmine) (ng/ml). A: The concentration of 20 ng/ml of harmine significantly decreased cell viability. B: Concentrations of 100 and 200 ng/ml of HGF significantly decreased cell viability compared to other concentrations. C: The concentration of 2.5 ng/ml of WS6 resulted in the lowest percentage of cell viability. D: The concentration of 25 ng/ml of TGF had the most toxic effect on the cells. E: concentrations of 50 and 100 ng/ml of EGF almost similarly caused the most toxic effect on cells