CD94 is essential for NK cell-mediated resistance to a lethal viral disease.

CD94 is essential for NK cell-mediated resistance to a lethal viral disease.
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DOI:
10.1016/j.immuni.2011.02.015
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发表时间:
2011-04-22
期刊:
影响因子:
32.4
通讯作者:
Sigal LJ
Sigal LJ
中科院分区:
医学1区
文献类型:
--
作者:
Fang M;Orr MT;Spee P;Egebjerg T;Lanier LL;Sigal LJ

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众所周知,自然杀伤 (NK) 细胞具有对许多病毒性疾病的抵抗力,但只有少数情况下,NK 细胞识别病毒感染细胞的分子机制是已知的。在这里,我们表明 CD94(一种由 NK 细胞优先表达的分子)对于 C57BL/6 小鼠对鼠痘(一种由正痘病毒 ectromelia 病毒引起的疾病)的抵抗至关重要。表达主要组织相容性复合体 (MHC) Ib 类分子 Qa-1b 的感染细胞,可被 CD94 和 NKG2E 形成的激活受体特异性识别。由于CD94-NKG2受体及其配体在啮齿动物和人类中高度保守,因此在人类感染天花和猴痘病毒期间可能存在类似的机制,这些病毒与节肢动物病毒高度同源。 ► CD94 缺乏会导致对致命性鼠痘的易感性 ► NK 细胞需要 CD94 来预防鼠痘 ► CD94-NKG2E 以 Qa-1b 依赖性方式识别 ECTV 感染的细胞
It is well established that natural killer (NK) cells confer resistance to many viral diseases, but in only a few instances the molecular mechanisms whereby NK cells recognize virus-infected cells are known. Here we show that CD94, a molecule preferentially expressed by NK cells, is essential for the resistance of C57BL/6 mice to mousepox, a disease caused by the Orthopoxvirus ectromelia virus. Ectromelia virus-infected cells expressing the major histocompatibility complex (MHC) class Ib molecule Qa-1b are specifically recognized by the activating receptor formed by CD94 and NKG2E. Because CD94-NKG2 receptors and their ligands are highly conserved in rodents and humans, a similar mechanism may exist during human infections with the smallpox and monkeypox viruses, which are highly homologous to ectromelia virus. ► Deficiency in CD94 results in susceptibility to lethal mousepox ► NK cells require CD94 to protect from mousepox ► CD94-NKG2E recognizes ECTV-infected cells in a Qa-1b-dependent manner
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