Adaptive immune features of natural killer cells.

Adaptive immune features of natural killer cells.
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DOI:
10.1038/nature07665
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发表时间:
2009-01-29
期刊:
影响因子:
64.8
通讯作者:
Lanier, Lewis L.
Lanier, Lewis L.
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Sun, Joseph C.;Beilke, Joshua N.;Lanier, Lewis L.

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In an adaptive immune response, naïve T cells proliferate during infection and generate long-lived memory cells that undergo secondary expansion following re-encounter with the same pathogen. Although Natural Killer cells traditionally have been classified as cells of the innate immune system, they share many similarities with cytotoxic T lymphocytes. In a mouse model of cytomegalovirus (MCMV) infection, we demonstrate that, like T cells, NK cells bearing the virus-specific Ly49H receptor proliferate 100-fold in the spleen and 1000-fold in the liver following infection. Following a contraction phase, Ly49H+ NK cells reside in lymphoid and non-lymphoid organs for several months. These self-renewing “memory” NK cells rapidly degranulate and produce cytokines upon reactivation. Adoptive transfer of these NK cells into naïve animals followed by viral challenge results in a robust secondary expansion and protective immunity. These findings reveal novel properties of NK cells previously attributed only to cells of the adaptive immune system.
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