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Adaptive Immune Features Of Natural Killer Cells

机译:自然杀伤细胞的适应性免疫功能

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摘要

In an adaptive immune response, naive T cells proliferate during infection and generate long-lived memory cells that undergo secondary expansion after a repeat encounter with the same pathogen. Although natural killer (NK) cells have traditionally been classified as cells of the innate immune system, they share many similarities with cytotoxic T lymphocytes. We use a mouse model of cytomegalovirus infection to show that, like T cells, NK cells bearing the virus-specific Ly49H receptor proliferate 100-fold in the spleen and 1,000-fold in the liver after infection. After a contraction phase, Ly49H-positive NK cells reside in lymphoid and non-lymphoid organs for several months. These self-renewing 'memory' NK cells rapidly degranulate and produce cytokines on reactivation. Adoptive transfer of these NK cells into naive animals followed by viral challenge results in a robust secondary expansion and protective immunity. These findings reveal properties of NK cells that were previously attributed only to cells of the adaptive immune system.
机译:在适应性免疫应答中,幼稚T细胞在感染过程中增殖并产生长寿的记忆细胞,这些记忆细胞在与相同病原体反复接触后会经历二次扩增。尽管传统上将自然杀伤(NK)细胞归类为先天免疫系统细胞,但它们与细胞毒性T淋巴细胞具有许多相似之处。我们使用巨细胞病毒感染的小鼠模型显示,感染后,像T细胞一样,带有病毒特异性Ly49H受体的NK细胞在脾脏中增殖100倍,在肝脏中增殖1000倍。收缩期后,Ly49H阳性NK细胞在淋巴和非淋巴器官中驻留数月。这些自我更新的“记忆” NK细胞迅速脱粒并在重新激活时产生细胞因子。这些NK细胞过继转移到幼稚动物中,然后进行病毒攻击,导致了强大的继发性扩张和保护性免疫。这些发现揭示了以前仅归因于适应性免疫系统细胞的NK细胞的特性。

著录项

  • 来源
    《Nature》 |2009年第7229期|p.557-561|共5页
  • 作者单位

    Department of Microbiology and Immunology and the Cancer Research Institute, University of California, San Francisco, California 94143, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 自然科学总论;
  • 关键词

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