ZFP281控制着转录和表观遗传变化,通过DNMT3和TET1促进小鼠的多能状态过渡
Xin Huang1, Sophie Balmer2, Cong Lyu3
1Department of Medicine, Columbia Center for Human Development and Stem Cell Therapies, Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, NY 10032, USA.
Developmental cell
|January 18, 2024
概括
转录因子ZFP281直接激活DNA甲基转移酶 (DNMT3A/3B),并与TET1协调调节多能干细胞转换期间的DNA甲基化动态,保持原始多能性.
科学领域:
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 干细胞生物学 干细胞生物学
- 发展生物学 发展生物学
背景情况:
- 多能干细胞状态 (天真,形成,原始) 模仿早期胚胎发育.
- 这些状态之间的过渡涉及由de novo DNA甲基转移酶调节的DNA甲基化变化.
- 协调这些表观遗传事件的上游调节者尚未完全理解.
研究的目的:
- 在多能状态转换期间识别DNA甲基化动态的上游调节者.
- 研究ZFP281在协调干细胞内表观遗传重编程中的作用.
主要方法:
- 使用Zfp281淘汰赛小鼠模型和降低诺金细胞系.
- 分析了ZFP281和TET1.1的染色体同时占用情况.
- 研究了ZFP281向基因促进体的R-循环形成.
主要成果:
- 在多能干细胞中,ZFP281直接激活Dnmt3a和Dnmt3b的转录.
- ZFP281和TET1的共同占用表现出一个动态模式,受到R循环的影响.
- 这种动态调节控制了DNA甲基化和基因表达在天真-形成-原始过渡期间.
- ZFP281对于保持DNA甲基化在原始化的多能性中至关重要.
结论:
- 在多能状态转换期间,ZFP281在编排DNA甲基化变化方面发挥着关键作用.
- ZFP281协调DNMT3A/3B和TET1的功能,以促进这些发展过程.
- 这确定了干细胞命运决定中的表观遗传调节的新机制.
相关概念视频
Chromatin Modification in iPS Cells
1.7K
Chromatin modification alters gene expression; therefore, scientists can add histone-modifying enzymes, histone variants, and chromatin remodeling complexes to somatic cells to aid reprogramming into pluripotent stem (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...
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...
1.7K
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
Methods of Nuclear Reprogramming
1.8K
Nuclear reprogramming is a process of transforming one cell type into an unrelated cell type by epigenetic changes that alter the cell’s original gene expression pattern. Such epigenetic changes force cells to express a different set of genes, which play a significant role in inducing transformation into other cell types. Nuclear reprogramming offers applications in reproductive cloning for livestock propagation and regenerative medicine — developing patient-specific cells for...
1.8K
Combinatorial Gene Control
8.3K
Combinatorial gene control is the synergistic action of several transcriptional factors to regulate the expression of a single gene. The absence of one or more of these factors may lead to a significant difference in the level of gene expression or repression.
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...
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...
8.3K
Epigenetic Regulation
3.0K
Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
X-chromosome...
X-chromosome...
3.0K
Somatic to iPS Cell Reprogramming
2.2K
Reprogramming alters the gene expression in somatic cells, transforming them into induced pluripotent stem (iPS) cells over several generations. Scientists can reprogram cells by introducing genes for four transcription factors—Oct4, Sox2, Klf4, and c-Myc (OSKM) by viral or non-viral methods. These factors are also known as Yamanaka factors after Shinya Yamanaka, who first generated iPS cells using mouse skin cells. Yamanaka was awarded the Nobel Prize in Physiology or Medicine in 2012...
2.2K


