目前认为,细胞凋亡是在生理或病理条件下,有核细胞接受某种信号的刺激和触发后,启动自身内部程序,主要通过内源性ＤＮＡ内切酶的激活而发生的细胞自然死亡过程。肿瘤的发生,可认为是细胞群体凋亡和增殖的平衡受到破坏,异常细胞增殖速度超过凋亡速度,从而过度积累形成肿瘤。细胞 At present, it is considered that apoptosis is a process in which the nucleated cells undergo stimulation and triggering of certain signals under physiological or pathological conditions, and initiate their own internal procedures, and the natural death process of cells occurs mainly through the activation of endogenous DNA endonucleases. . The occurrence of tumor can be considered as the destruction of the balance of apoptosis and proliferation of the cell population. The abnormal cell proliferation rate exceeds the rate of apoptosis, resulting in excessive accumulation of tumors. cell