Cutting edge: KIR antisense transcripts are processed into a 28-base PIWI-like RNA in human NK cells.

Cutting edge: KIR antisense transcripts are processed into a 28-base PIWI-like RNA in human NK cells.
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DOI:
10.4049/jimmunol.1000855
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发表时间:
2010-08-15
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Miller JS
Miller JS
中科院分区:
其他
文献类型:
--
作者:
Cichocki F;Lenvik T;Sharma N;Yun G;Anderson SK;Miller JS

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杀伤免疫球蛋白样受体(KIR)以多样的、克隆限制的方式在自然杀伤(NK)细胞上表达,并且是NK细胞功能的重要决定因素。尽管单个KIR基因的沉默与启动子内CpG二核苷酸甲基化的存在密切相关,但尚未确定沉默的机制。我们的研究结果表明,反义转录介导KIR转录沉默通过一种新的PIWI样28碱基的小RNA。虽然PIWI RNA介导的转座因子在生殖细胞内的沉默已被描述,这是第一份报告,确定了PIWI样RNA在免疫体细胞谱系,并确定了一种机制,可广泛用于协调免疫发展。
Killer immunoglobulin-like receptors (KIR) are expressed in a variegated, clonally restricted fashion on natural killer (NK) cells and are important determinants of NK cell function. Although silencing of individual KIR genes is strongly correlated with the presence of CpG dinucleotide methylation within the promoter, the mechanism responsible for silencing has not been identified. Our results show that antisense transcripts mediate KIR transcriptional silencing through a novel PIWI-like 28 base small RNA. Although PIWI RNA-mediated silencing of transposable elements within germ cells have been described, this is the first report that identifies a PIWI-like RNA in an immune somatic cell lineage and identifies a mechanism which may be broadly used in orchestrating immune development.
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影响因子: 5
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