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Natural killer cell memory

机译:自然杀伤细胞记忆

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Natural killer (NK) cells are bone marrow-derived granular lymphocytes that have a key role in immune defense against viral and bacterial infections and malignancies. NK cells are traditionally defined as cells of the innate immune response because they lack RAG recombinase-dependent clonal antigen receptors. However, evidence suggests that specific subsets of mouse NK cells can nevertheless develop long-lived and highly specific memory to a variety of antigens. Here we review published evidence of NK cell-mediated, RAG-independent adaptive immunity. We also compare and contrast candidate mechanisms for mammalian NK cell memory and antigen recognition with other examples of RAG-independent pathways that generate antigen receptor diversity in non-mammalian species and discuss NK cell memory in the context of lymphocyte evolution.
机译:天然杀伤(NK)细胞是源自骨髓的粒状淋巴细胞,在针对病毒和细菌感染以及恶性肿瘤的免疫防御中具有关键作用。 NK细胞传统上被定义为先天性免疫应答的细胞,因为它们缺少RAG重组酶依赖性克隆抗原受体。但是,证据表明,小鼠NK细胞的特定子集仍然可以对多种抗原形成长寿命且高度特异性的记忆。在这里,我们回顾了NK细胞介导的,非RAG独立的适应性免疫的已发表证据。我们还将比较和对比哺乳动物NK细胞记忆和抗原识别的候选机制,以及在非哺乳动物物种中产生抗原受体多样性的RAG独立途径的其他实例,并讨论淋巴细胞进化过程中的NK细胞记忆。

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