Evolution of the human-specific microRNA miR-941.

Evolution of the human-specific microRNA miR-941.
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人类特异性 microRNA miR-941 的进化

DOI:
10.1038/ncomms2146
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发表时间:
2012
影响因子:
16.6
通讯作者:
--
中科院分区:
综合性期刊1区
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--
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microRNA介导的基因调控在许多生理过程中是重要的。在这里,我们探讨了microRNA,miR-941,在人类进化中的作用。我们发现,miR-941在人类谱系中出现于600万至100万年前,来自进化上不稳定的串联重复序列。它的拷贝数在人类中保持多态性,并显示出随着非洲的迁移而减少的趋势。miR-941的出现伴随着miR-941结合位点的加速丧失,可能是为了逃避调控。我们进一步表明,miR-941在多能细胞中高度表达,在分化时受到抑制,并优先靶向hedgehog和胰岛素信号通路中的基因,从而表明在细胞分化中的作用。miR-941调控的人类特异性效应在大脑中可检测到,并影响参与神经递质信号传导的基因。总之,这些结果暗示miR-941在人类进化中,并提供了一个例子,在人类谱系中的快速调控进化。
MicroRNA-mediated gene regulation is important in many physiological processes. Here we explore the roles of a microRNA, miR-941, in human evolution. We find that miR-941 emergedde novoin the human lineage, between six and one million years ago, from an evolutionarily volatile tandem repeat sequence. Its copy-number remains polymorphic in humans and shows a trend for decreasing copy-number with migration out of Africa. Emergence of miR-941 was accompanied by accelerated loss of miR-941-binding sites, presumably to escape regulation. We further show that miR-941 is highly expressed in pluripotent cells, repressed upon differentiation and preferentially targets genes in hedgehog- and insulin-signalling pathways, thus suggesting roles in cellular differentiation. Human-specific effects of miR-941 regulation are detectable in the brain and affect genes involved in neurotransmitter signalling. Taken together, these results implicate miR-941 in human evolution, and provide an example of rapid regulatory evolution in the human linage.
DOI: 10.1101/gr.093781.109
发表时间: 2009-11-01
期刊: GENOME RESEARCH
影响因子: 7
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发表时间: 2008-06-10
影响因子: 11.1
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