Genome-wide functional analysis reveals factors needed at the transition steps of induced reprogramming.

Genome-wide functional analysis reveals factors needed at the transition steps of induced reprogramming.
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DOI:
10.1016/j.celrep.2014.07.002
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发表时间:
2014-07-24
期刊:
影响因子:
8.8
通讯作者:
Rana TM
Rana TM
中科院分区:
生物学1区
文献类型:
--
作者:
Yang CS;Chang KY;Rana TM

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While transcriptome analysis can uncover the molecular changes that occur during induced reprogramming, the functional requirements for a given factor during step-wise cell-fate transitions are left unclear. Here, we useda genome-wide RNAi screen and performed integrated transcriptome analysis to identify key genes and cellular events required at the transition steps in reprogramming. Genes associated with cell signaling pathways (e.g., Itpr1, Itpr2, Pdia3) constitute the major regulatory networks before cells acquire pluripotency. Activation of a specific gene set (e.g., Utf1, Tdgf1) is important for mature iPSC formation. Strikingly, a major proportion of RNAi targets (~53% to 70%) includes genes whose expression levels are unchanged during reprogramming. Among these nondifferentially expressedgenes, Dmbx1, Hnf4g, Nobox and Asb4, are important, while Nfe2, Cdkn2aip, Msx3, Dbx1, Lzts1, Gtf2i, and Ankrd22 are roadblocks, to reprogramming. Together, our results provide a wealth of information about gene functions required at transition steps during reprogramming.
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