these growth factors ( platelet-derived growth factor of 80 ng/ml , nerve growth factor of 10 ng/ml or epidermal growth factor of 10 ng/ml ) caused disappearance of actin filaments from the peripheral region of a cell in 1 or 2 h and change of cell configuration to spindle shape in 3 or 4 h .
C0018284
growth factors
C0032200
platelet-derived growth factor