Nonstochastic reprogramming from a privileged somatic cell state.

Nonstochastic reprogramming from a privileged somatic cell state.
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DOI:
10.1016/j.cell.2014.01.020
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发表时间:
2014-02-13
期刊:
影响因子:
64.5
通讯作者:
Lu J
Lu J
中科院分区:
生物学1区
文献类型:
--
作者:
Guo S;Zi X;Schulz VP;Cheng J;Zhong M;Koochaki SH;Megyola CM;Pan X;Heydari K;Weissman SM;Gallagher PG;Krause DS;Fan R;Lu J

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Reprogramming somatic cells to induced pluripotency by Yamanaka factors is usually slow and inefficient, and is thought to be a stochastic process. We identified a privileged somatic cell state, from which acquisition of pluripotency could occur in a non-stochastic manner. Subsets of murine hematopoietic progenitors are privileged, whose progeny cells predominantly adopt the pluripotent fate with activation of endogenous Oct4 locus after 4–5 divisions in reprogramming conditions. Privileged cells display an ultrafast cell cycle of ~8 hours. In fibroblasts, a subpopulation cycling at a similar ultrafast speed is observed after 6 days of factor expression, and is increased by p53-knockdown. This ultrafast-cycling population accounts for >99% of the bulk reprogramming activity in wildtype or p53-knockdown fibroblasts. Our data demonstrate that the stochastic nature of reprogramming can be overcome in a privileged somatic cell state, and suggest that cell cycle acceleration toward a critical threshold is an important bottleneck for reprogramming.
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