MicroRNAs Induce a Permissive Chromatin Environment that Enables Neuronal Subtype-Specific Reprogramming of Adult Human Fibroblasts.

MicroRNAs Induce a Permissive Chromatin Environment that Enables Neuronal Subtype-Specific Reprogramming of Adult Human Fibroblasts.
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DOI:
10.1016/j.stem.2017.08.002
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发表时间:
2017-09-07
期刊:
影响因子:
23.9
通讯作者:
Yoo AS
Yoo AS
中科院分区:
医学1区
文献类型:
--
作者:
Abernathy DG;Kim WK;McCoy MJ;Lake AM;Ouwenga R;Lee SW;Xing X;Li D;Lee HJ;Heuckeroth RO;Dougherty JD;Wang T;Yoo AS

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Directed reprogramming of human fibroblasts into fully-differentiated neurons requires massive changes in epigenetic and transcriptional states. Induction of a chromatin environment permissive to acquiring neuronal subtype identity is therefore a major barrier to fate conversion. Here we show that the brain-enriched miRNAs miR-9/9* and miR-124 (miR-9/9*-124) trigger reconfiguration of chromatin accessibility, DNA methylation, and mRNA expression to induce a default neuronal state. MiR-9/9*-124-induced neurons (miNs) are functionally excitable and are uncommitted towards specific subtypes yet possess open chromatin at neuronal subtype-specific loci, suggesting such identity can be imparted by additional lineage-specific transcription factors. Consistently, we show ISL1 and LHX3 selectively drive conversion to a highly homogenous population of human spinal cord motor neurons. Taken together, this study shows modular synergism between miRNAs and neuronal subtype-specific transcription factors can drive lineage-specific neuronal reprogramming, thereby providing a general platform for high-efficiency generation of distinct subtypes of human neurons.
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