NK细胞(Natunal killer cell)是近年来发现的除巨噬细胞、细胞毒T细胞和K细胞(介导ADCC的)之外,又一类细胞毒效应细胞。这类细胞非粘附、非吞噬,又无通常的B和T细胞表面标志,存在于正常人和动物的外周血、脾、骨髓和肺。不需预先免疫刺激,就能溶解或破坏多种肿瘤细胞和某些病毒或细菌感 The NK cell (Natal killer cell) is another type of cytotoxic effector cell that has been found in recent years in addition to macrophages, cytotoxic T cells and K cells (mediating ADCC). Such cells are non-adherent, non-phagocytic, and lack the usual surface markers of B and T cells, present in peripheral blood, spleen, bone marrow and lung of normal humans and animals. Without pre-immune stimulation, can dissolve or destroy a variety of tumor cells and some viruses or bacteria