P27 is a new kind of tumor suppressor gene ,it acts to contral the cell cycle , to induce apoptosis and to regulate differentiation.The reduced expression of P27 has a relationship with tumorigenesis.

• P27是一种新的肿瘤抑制基因，它参与细胞周期的调控、细胞的凋亡及细胞的分化，与肿瘤的发生有关。