We next examined if SCF inhibited by siRNA caused increased or decreased proliferation of fibroblasts. The MTT method was used to demonstrate fibroblast proliferation. Compared with the vehicle control group, the cell viability showed no difference between the control (100%) and SCF gene knockdown fibroblasts (103%). Figure 1b demonstrates neither cellular morphology nor cell confluency were altered. Similar results were observed regarding fibroblast morphology, where without cellular atrophy damage, flattened or low confluency were observed in Figure 1c. The data indicated the lack of an SCF gene did not affect cell growth and cellular morphology.