肿瘤产生的本质目前普遍观点认为是细胞增殖的调节失控,而细胞的增殖要通过细胞周期来调控。大量研究发现,许多癌基因的功能与细胞周期的调控密切相关,部分抑癌基因正是作用于细胞周期某些关键环节,以控制细胞的过度增殖,从而防止肿瘤的发生。而一些癌基因的激活则可导致细胞增 The nature of the tumor now widely believed that the regulation of cell proliferation out of control, and the proliferation of cells through the cell cycle to control. A large number of studies have found that many oncogenes are closely related to the regulation of cell cycle. Some tumor suppressor genes act on some key aspects of the cell cycle to control the excessive proliferation of cells and prevent the occurrence of tumors. The activation of some oncogenes can lead to cell proliferation