miR-137 forms a regulatory loop with nuclear receptor TLX and LSD1 in neural stem cells.

miR-137 forms a regulatory loop with nuclear receptor TLX and LSD1 in neural stem cells.
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DOI:
10.1038/ncomms1532
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发表时间:
2011-11-08
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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MIR-137是一种富含大脑的microRNA。它在神经发育中的作用尚不清楚。在这里,我们表明miR-137在控制胚胎神经干细胞命运的决定中起着至关重要的作用。MIR-137负向调节细胞增殖,加速胚胎神经干细胞的神经分化。此外,我们还发现组蛋白去甲基酶LSD1是核受体TLX的转录共抑制因子,是miR-137的下游靶标。胎鼠脑内电穿孔miR-137基因可导致转基因细胞的提前分化和向外迁移。引入缺失miR-137识别位点的LSD1表达载体,挽救了miR-137诱导的早熟分化。此外,我们证明了TLX是神经干细胞自我更新的重要调节因子,通过将LSD1招募到miR-137的基因组区域来抑制miR-137的表达。因此,miR-137与TLX和LSD1形成反馈调控环,在神经发育过程中控制神经干细胞增殖和分化之间的动态。
miR-137 is a brain-enriched microRNA. Its role in neural development remains unknown. Here we show that miR-137 plays an essential role in controlling embryonic neural stem cell fate determination. miR-137 negatively regulates cell proliferation and accelerates neural differentiation of embryonic neural stem cells. In addition, we show that histone demethylase LSD1, a transcriptional co-repressor of nuclear receptor TLX, is a downstream target of miR-137. In utero electroporation of miR-137 in embryonic mouse brains led to premature differentiation and outward migration of the transfected cells. Introducing a LSD1 expression vector lacking the miR-137 recognition site rescued miR-137-induced precocious differentiation. Furthermore, we demonstrate that TLX, an essential regulator of neural stem cell self-renewal, represses the expression of miR-137 by recruiting LSD1 to the genomic regions of miR-137. Thus, miR-137 forms a feedback regulatory loop with TLX and LSD1 to control the dynamics between neural stem cell proliferation and differentiation during neural development.
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