恶性肿瘤转移是一个多因素参与的复杂过程，ｒａｓ癌基因多层次、全方位的影响这个过程。其作用机理包括：与肿瘤病毒的协同作用，导致肿瘤细胞转移表性改变；影响肿瘤细胞表面粘附分子的表达，促进细胞间或基质间的粘附，增强基质的蛋白酶活性；促进基质中的纤维蛋白降解；诱导肿瘤细胞逃避免疫监视，最终导致肿瘤细胞的浸润和转移 Malignant tumor metastasis is a complex process with multiple factors involved. The ras cancer gene influences this process in multiple levels and in all directions. Its mechanism of action includes: synergy with the tumor virus, leading to the metastasis of tumor cells; affect the expression of adhesion molecules on the surface of tumor cells, promote adhesion between cells or matrix, enhance the protease activity of the matrix; promote the fibers in the matrix Protein degradation; Induces tumor cells to evade immune surveillance, eventually leading to tumor cell infiltration and metastasis