在细胞融合后,Nanog促进了多能性的转移
José Silva1, Ian Chambers, Steven Pollard
1Centre Development in Stem Cell Biology, Institute for Stem Cell Research, University of Edinburgh, Edinburgh, EH9 3JQ, UK.
Nature
|June 23, 2006
概括
胚胎干细胞 (ES) 中的纳米蛋白驱动着分化细胞的重编程. 增加的纳诺基水平显著提高了重置体细胞表观基因组到多能性的效率.
科学领域:
- 干细胞生物学 干细胞生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 发育生物学是发展生物学.
背景情况:
- 胚胎干细胞 (ES) 具有通过细胞融合重新编程分化细胞核的能力,消除发育编程并强加多能性.
- 识别调解这种重编程的分子对于理解多能诱导至关重要.
研究的目的:
- 为了研究变异性家庭主区蛋白 Nanog 在调解 ES 细胞对分化细胞核的重编程中的作用.
- 量化Nanog对不同体细胞类型的混合殖民地恢复和多能诱导的影响.
主要方法:
- 细胞融合实验涉及ES细胞和各种体细胞 (神经干细胞,胸细胞,纤维细胞).
- 混合殖民地形成的定量分析和它们的ES细胞样性质的表征.
- 评估纳诺基水平及其与多能基因激活和表观遗传重置的相关性.
主要成果:
- 在ES-NS细胞融合中增加的Nanog水平刺激了多能基因激活,并增加了混合殖民地恢复的200倍.
- 纳诺基增强了与胸细胞和纤维细胞的融合中的混合产量,尽管效率低于NS细胞,表明细胞类型特定的重编程易感性.
- 提升的Nanog使初级NS x ES细胞杂交物能够发展成高频率的ES细胞殖民地,证明足够的表观遗传重置到多能性.
结论:
- 纳诺基是ES细胞机械所需建立多能性的关键协调者.
- 纳诺格可以有效地将体细胞表观基因组重置到多能状态,其效率取决于体细胞的分化状态.
- 这项研究强调了纳诺格在细胞重编程和多能诱导中的关键作用.
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