在具有血统特征的小鼠体细胞中诱导多能性
1MOE Key Laboratory of Cell Proliferation and Differentiation, College of Life Sciences, Peking University, Beijing 100871, China.
Cell
|May 28, 2013
概括
可以在小鼠细胞中使用对抗多能因子的谱系指标诱导多能性,提供一种新的重编程策略. 这一发现挑战了现有的模型,表明竞争因素可以协同实现多能.
科学领域:
- 细胞生物学 细胞生物学
- 发育生物学 发展生物学
- 遗传学 是一个遗传学.
背景情况:
- 诱导多能性的重编程因子通常来自与胚胎干细胞 (ESC) 丰富的多能性相关因子.
- 现有的方法依赖于识别促进多能性的因素,往往忽视了其他途径.
研究的目的:
- 调查通常被认为是多能性竞争对手的血统特征者是否可以在小鼠体细胞重编程期间诱导多能性.
- 探索血统指标在抑制ESC认同中的作用及其替代OCT4和SOX2.2等核心多能性因素的潜力.
主要方法:
- 在小鼠体细胞重编程中,使用谱系指标进行了.
- 进行基因表达分析,观察OCT4/SOX2替代品对外皮 (ECT) 和间皮 (ME) 基因的影响.
- 在实验条件下,在没有OCT4和SOX2.2的情况下,测试了抵消谱系指标的协同效应.
主要成果:
- 发现涉及中皮层 (ME) 和外皮层 (ECT) 规范的谱系指标分别取代了OCT4和SOX2.
- 在重编程过程中,OCT4替代物减少了ECT基因表达,而SOX2替代物减少了ME基因表达.
- 两种相抵消的谱系特征使得即使没有OCT4和SOX2.2,也能协同诱导多能性.
结论:
- 可实现多能诱导使用对抗ESC身份的谱系指标,扩大细胞重编程工具包.
- 提出了一个"摇摆模型",强调多能因素和对立的谱系指标之间的平衡对于成功的重编程至关重要.
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