A molecular roadmap of reprogramming somatic cells into iPS cells.

A molecular roadmap of reprogramming somatic cells into iPS cells.
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DOI:
10.1016/j.cell.2012.11.039
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发表时间:
2012-12-21
期刊:
影响因子:
64.5
通讯作者:
Hochedlinger K
Hochedlinger K
中科院分区:
生物学1区
文献类型:
--
作者:
Polo JM;Anderssen E;Walsh RM;Schwarz BA;Nefzger CM;Lim SM;Borkent M;Apostolou E;Alaei S;Cloutier J;Bar-Nur O;Cheloufi S;Stadtfeld M;Figueroa ME;Robinton D;Natesan S;Melnick A;Zhu J;Ramaswamy S;Hochedlinger K

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Factor-induced reprogramming of somatic cells into induced pluripotent stem cells (iPSCs) is inefficient, complicating mechanistic studies. Here, we studied defined intermediate cell populations poised to becoming iPSCs by genome-wide analyses. We show that induced pluripotency elicits two transcriptional waves, which are driven by c-Myc/Klf4 (first wave) and Oct4/Sox2/Klf4 (second wave). Cells that become refractory to reprogramming activate the first but fail to initiate the second transcriptional wave and can be rescued by elevated expression of all four factors. The establishment of bivalent domains occurs gradually after the first wave, while changes in DNA methylation take place after the second wave when cells acquire stable pluripotency. This integrative analysis allowed us to identify genes that act as roadblocks during reprogramming and surface markers that further enrich for cells prone to forming iPSCs. Collectively, our data offer new mechanistic insights into the nature and sequence of molecular events inherent to cellular reprogramming.
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