相关实验视频
Updated: May 10, 2026

Chromatin Immunoprecipitation from Human Embryonic Stem Cells
Published on: July 22, 2008
希斯 arginine甲基化调节了早期小鼠胚胎中的多能性
Maria-Elena Torres-Padilla1, David-Emlyn Parfitt, Tony Kouzarides
1The Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Tennis Court Road, Cambridge CB2 1QN, UK.
早期的小鼠胚胎细胞显示出基于基质子修饰的独特的发育潜力. 基因组H3氨酸甲基化标记了用于内部细胞质的细胞,影响了早期胚胎发育和细胞命运的决定.
科学领域:
- 发育生物学 发展生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 细胞生物学 细胞生物学
背景情况:
- 哺乳动物胚胎的发育传统上假设细胞的身份在内部细胞质量和体形成后出现.
- 最近的研究表明,细胞命运和活性差异早在小鼠胚胎的四细胞阶段就存在.
- 这些早期的细胞差异与分裂分裂的方向和顺序有关.
研究的目的:
- 调查表观遗传机制的作用,特别是基因组修饰,在早期细胞命运的决定.
- 确定与哺乳动物胚胎细胞功率和发育命运相关的最早的表观遗传标记.
- 探索基氨酸甲基化对芽细胞体分化和对胚胎血统的贡献的影响.
主要方法:
- 在四细胞阶段芽细胞体中分析 histone H3 arginine 甲基化水平.
- 甲基化水平与细胞对内部细胞质量 (ICM) 和皮的贡献的相关性.
- 化学胚胎研究,以评估不同甲基化水平的芽细胞的发育潜力.
- 过度表达CARM1 (H3特异性氨酸甲基转移酶) 来操纵表观遗传标记并观察细胞命运和基因表达的影响 (Nanog, Sox2).
主要成果:
- 在注定为ICM和极地 trofhectoderm的四细胞母细胞体中,histon H3 arginine的甲基化水平是最大的.
- 较低的H3氨酸甲基化水平与对壁面 trofhectoderm 和发展受损的贡献相关.
- 过度表达CARM1将胚芽细胞的后代引导到ICM,并上调多能性基因Nanog和Sox2.
- 特定的基因素修饰被确定为影响ICM发展的最早的表观遗传标记.
结论:
- 基因组H3氨酸甲基化是影响哺乳动物胚胎发育的最早已知的表观遗传标记物.
- 表观遗传修饰,特别是H3氨酸甲基化,在早期胚胎中决定细胞命运和功效方面发挥着至关重要的作用.
- 对表观遗传信息的操纵可以直接决定细胞命运,提供对发育可塑性的见解.
更多相关视频
10:09Isolation and Cultivation of Neural Progenitors Followed by Chromatin-Immunoprecipitation of Histone 3 Lysine 79 Dimethylation Mark
Published on: January 26, 2018
12:06Generation of Human Primordial Germ Cell-like Cells at the Surface of Embryoid Bodies from Primed-pluripotency Induced Pluripotent Stem Cells
Published on: January 11, 2019
相关概念视频
Histone Modification
Acetylation
The enzyme histone acetyltransferase adds acetyl group to the histones. Another enzyme, histone deacetylase,...
Combinatorial Gene Control
The expression of more than 30,000 genes is controlled by approximately 2000-3000 transcription factors. This is possible because a single transcription factor can recognize more than one regulatory sequence. The specificity in gene...
Maintenance of the ES Cell State
Somatic to iPS Cell Reprogramming
Chromatin Modification in iPS Cells
Compact chromatin makes reprogramming difficult. Enzymes, such as histone demethylases and acetyltransferases, are often added during reprogramming to loosen the chromatin, making the DNA more accessible to transcription factors. Molecules that inhibit histone...
Methods of Nuclear Reprogramming