A poptosis induced by irradiation is due to upregula-tion of the bax protein or downregulation of the bcl-2 protein.

• 放射线可能通过调整凋亡相关基因及基表达产物bax蛋白及bcl-2蛋白的水平诱发细胞凋亡而达到治疗肿瘤的目的。