By paracrine secretion VEGF effects on vascular endothelial cell receptor, through PTK converying access, promoting VEC hyperplasia, generating profuse capillary vesse;

• VEGF通过旁分泌方式作用于血管内皮细胞受体，经酪氨酸激酶传导通路发挥功效，促进血管内皮细胞增生，生成大量微血管；