Deconstructing Stepwise Fate Conversion of Human Fibroblasts to Neurons by MicroRNAs.

Deconstructing Stepwise Fate Conversion of Human Fibroblasts to Neurons by MicroRNAs.
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DOI:
10.1016/j.stem.2020.08.015
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发表时间:
2021-01-07
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:
Cates K;McCoy MJ;Kwon JS;Liu Y;Abernathy DG;Zhang B;Liu S;Gontarz P;Kim WK;Chen S;Kong W;Ho JN;Burbach KF;Gabel HW;Morris SA;Yoo AS

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Cell fate conversion generally requires reprogramming effectors to both introduce fate programs of the target cell type and erase the identity of starting cell population. Here, we reveal insights into the activity of microRNAs, miR-9/9* and miR-124 (miR-9/9*-124) as reprogramming agents that orchestrate direct conversion of human fibroblasts into motor neurons, by first eradicating fibroblast identity and promoting uniform transition to a neuronal state in sequence. We identify KLF-family transcription factors as direct target genes for miR-9/9*-124 and show their repression is critical for erasing fibroblast fate. Subsequent gain of neuronal identity requires upregulation of a small nuclear RNA, RN7SK, which induces accessibilities of chromatin regions and neuronal gene activation to push cells to a neuronal state. Our study defines deterministic components in the microRNA-mediated reprogramming cascade.
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