Dynamic single-cell imaging of direct reprogramming reveals an early specifying event.

Dynamic single-cell imaging of direct reprogramming reveals an early specifying event.
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DOI:
10.1038/nbt.1632
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发表时间:
2010-05
影响因子:
46.9
通讯作者:
--
中科院分区:
工程技术1区
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--
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诱导多能干细胞的产生是一个可重复但效率低下的过程。虽然基因组学方法此前已被用于研究重编程,但它们是对大量细胞群体进行平均测量,其中大多数细胞未能诱导出多能性。在此,我们利用高分辨率的实时延时成像技术,追踪从单个供体细胞到多能性因子阳性集落的重编程过程。通过追溯成功重编程的集落,我们计算出一种标准化的起源细胞重编程效率,该效率仅限于形成集落的反应性细胞群。我们的数据详细描述了重编程群体的具体特征,并揭示了从体细胞形态和增殖指数到多能细胞的稳健的连续轨迹,这暗示了一个早期的定型事件。我们的结果阐明并扩展了先前提出的理论模型,并为仍不明确的直接重编程过程提供了重要的新见解。
Generation of induced pluripotent stem cells is a reproducible but inefficient procedure. While genomic approaches have previously been used to study reprogramming, they average measurements across a large population of cells, the majority of which fail to induce pluripotency. Here, we used high-resolution, live time–lapse imaging to trace the reprogramming process from single donor cells to pluripotency factor positive colonies. Tracing back successfully reprogrammed colonies, we calculate a normalized cell-of-origin reprogramming efficiency that is limited to the pool of responding cells that form colonies. Our data provided a detailed physical description of the specific characteristics of reprogramming populations and reveal a robust, sequential trajectory from a somatic morphology and proliferative index to those of pluripotent cells, suggestive of an early specifying event. Our results clarify and expand previously proposed theoretical models, and provide important new insights into the still poorly defined process of direct reprogramming.
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