细胞命运决定由一个形态原-转录因子-染色质修饰器轴决定
Jin Ming1,2,3, Lihui Lin3,4, Jiajun Li1,2
1Laboratory of Cell Fate Control, School of Life Sciences, Westlake University, Hangzhou, China.
Nature communications
|July 29, 2024
概括
像SALL4这样的转录因子 (TF) 使用NuRD复合体来控制细胞命运. BMP4信号破坏了这种相互作用,将细胞引导到原始内皮 (PrE) 而不是多能性.
科学领域:
- 发展生物学 发展生物学
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 细胞命运的决定在胚胎发生过程中至关重要,但在分子层面上理解得很差.
- 转录因子 (TF) 是已知的细胞命运调节者,控制从多能性到分化过程.
- TFs解释信号通路以决定特定细胞命运的精确机制需要进一步阐明.
研究的目的:
- 研究一种关键的转录因子SALL4解释BMP4信号以控制细胞命运决定的分子机制.
- 阐明NuRD (核酶体重塑和脱乙酶) 复合体在调解SALL4依赖细胞命运选择中的作用.
- 建立一个框架,以了解发展途径中的形态原-TF-染色体修饰剂相互作用.
主要方法:
- 利用受控的体外系统研究细胞命运决定.
- 研究了SALL4和NuRD复合体之间的相互作用.
- 分析了BMP4信号对SALL4-NuRD复杂动态和随后的基因调控网络的影响.
主要成果:
- SALL4与NuRD复合体合作,促进小鼠胚胎纤维细胞 (MEF) 的多能性.
- BMP4信号诱导SALL4从NuRD复合体中的物理解离.
- 这种解离会触发一个独特的基因调节网络,导致原始内皮 (PrE) 差异化.
结论:
- SALL4利用NuRD复合体来解释BMP4信号以确定细胞命运.
- BMP4信号作为一个开关,将SALL4与NuRD分离,将细胞引导到一个原始的内皮命运.
- 这些发现为调整细胞在发育过程中的命运决定所规定的形态原-TF-染色体修饰器通路提供了一个模型.
相关概念视频
Master Transcription Regulators
6.9K
Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
6.9K
General Transcription Factors
5.2K
Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
5.2K
Transcription Factors
75.8K
Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
75.8K
Chromatin Position Affects Gene Expression
23.3K
Chromatin is the massive complex of DNA and proteins packaged inside the nucleus. The complexity of chromatin folding and how it is packaged inside the nucleus greatly influences access to genetic information. Generally, the nucleus' periphery is considered transcriptionally repressive, while the cell's interior is considered a transcriptionally active area.
Topologically Associated Domains (TADs)
The 3-dimensional positioning of chromatin in the nucleus influences the...
Topologically Associated Domains (TADs)
The 3-dimensional positioning of chromatin in the nucleus influences the...
23.3K
TGF - β Signaling Pathway
7.3K
The TGF-β signaling pathway regulates cell growth, differentiation, adhesion, motility, and development. TGF-β ligands that induce TGF-β signaling are synthesized in their latent form. Several proteases or cell surface receptors such as integrins act upon the latent form, releasing the active ligand. There are three types of mammalian TGF-βs: (TGF-β1, TGF-β2, and TGF-β3) that bind as homodimers or heterodimers to TGF-β receptors. The TGF-β receptors...
7.3K
Determination
18.3K
During embryogenesis, cells become progressively committed to different fates through a two-step process: specification followed by determination. Specification is demonstrated by removing a segment of an early embryo, “neutrally” culturing the tissue in vitro—for example, in a petri dish with simple medium—and then observing the derivatives. If the cultured region gives rise to cell types that it would normally generate in the embryo, this means that it is specified. In...
18.3K


