自然杀伤(NK)细胞在对抗某些肿瘤上据证有重要作用,它可能代表一种不依赖吞噬作用的 T细胞监视机制。最近观察到,NK 细胞与骨髓移植物的排斥密切相关。因此推测它在体内也具有生理功能。虽然 NK 细胞的靶‘抗原’尚未完全确定。但很多恶性与非恶性细胞也包括正常胸腺细胞与骨髓细胞都对低水平 NK-介导的胞溶作用敏感。我们提供的证据表明。NK 细胞可能涉及到胸腺内正 Natural killer (NK) cells have an important role in fighting certain tumors and may represent a phagocytosis-independent T-cell surveillance mechanism. Recently, it has been observed that NK cells are closely related to the rejection of bone marrow transplants. Therefore, it is speculated that it also has physiological functions in vivo. Although the target ‘antigen’ of NK cells has not been completely determined. However, many malignant and non-malignant cells, including normal thymocytes and bone marrow cells, are sensitive to low levels of NK-mediated lysis. We provide evidence. NK cells may be involved in positive thymus