Fig. 2

Effects of different concentrations and durations of epidermal growth factor (EGF) on HaCaT cell migration. a and c. The effects of different concentrations (0, 1, 5, 10, and 100 ng/ml) of EGF on the migration distance of HaCaT cells (0 ng/ml: 103.37 ± 15.37 μm, 1 ng/ml: 309.34 ± 22.68 μm, 5 ng/ml: 410.63 ± 18.60 μm, 10 ng/ml: 525.24 ± 25.79 μm, 100 ng/ml: 213.94 ± 17.40 μm). b and d. The effects of different durations (2, 10, and 30 min) and a set concentration (10 ng/ml) of EGF on the migration distance of HaCaT cells (2 min: 461.46 ± 20.84 μm, 10 min: 522.18 ± 15.59 μm, 30 min: 558.35 ± 26.68 μm). The scale bar is 500 μm. Data are shown as means ± SD, **P < 0.01