机体对肿瘤细胞具有免疫监督功能的学说已存在了很长时间,这一学说认为,尽管宿主体内会因多种致瘤因素而出现细胞的转化,但因宿主的免疫系统能有效地识别和排除这些转化的细胞,而使之不能形成肿瘤。目前,仅有很有限的直接证据支持这一观点。T细胞在体内的存在对于体内免疫监督功能具有重要的作用。但是,由于缺乏抗原提呈细胞所提供的共刺激信号,体内能对肿瘤特异性 The theory that the body has immune surveillance function on tumor cells has existed for a long time. This theory believes that although the host cell will be transformed due to various tumorigenic factors, the host’s immune system can effectively identify and eliminate These transformed cells make them unable to form tumors. Currently, there is very limited direct evidence to support this view. The presence of T cells in vivo plays an important role in the immune surveillance function in vivo. However, due to the lack of co-stimulatory signals provided by antigen-presenting cells, the body can be specific for tumors.