缺氧特异性转录凝聚剂驱动转移
Steven Ingersoll1, Xiaojun Ren2
1Division of Medical Oncology, Department of Medicine, University of Colorado Denver, Anschutz Medical Campus, Aurora, CO 80045, USA.
Trends in cell biology
|May 16, 2025
概括
缺氧会触发细胞中的相分离凝聚物,改变染色质组织并影响与转移相关的基因转录. 这项研究揭示了环境压力期间细胞调节的新机制.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 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.
背景情况:
- 通过相位分离进行细胞分离是基因调节的关键.
- 将环境信号与遗传活动联系在一起的机制仍然不太清楚.
研究的目的:
- 调查缺氧如何影响相位分离和转录调节.
- 探索染色体组织在缺氧诱导的基因表达中的作用.
主要方法:
- 细胞成像技术观察凝结物形成.
- 染色体免疫沉测试分析染色体组织.
- 转录组分析以评估基因表达变化.
主要成果:
- 过氧被证明可以诱导形成明显的相隔凝结物.
- 发现这些凝结物可以重组染色质结构.
- 与转移相关的基因转录受到这些变化的显著影响.
结论:
- 阶段分离是细胞对低氧反应的关键机制.
- 缺氧诱导的冷凝物通过染色体重塑来调节转移相关的基因.
- 这项工作揭示了环境线索,相分离和基因表达之间的相互作用.
相关概念视频
Electron Carriers
Electron carriers can be thought of as electron shuttles. These compounds can easily accept electrons (i.e., be reduced) or lose them (i.e., be oxidized). They play an essential role in energy production because cellular respiration is contingent on the flow of electrons.
Over the many stages of cellular respiration, glucose breaks down into carbon dioxide and water. Electron carriers pick up electrons lost by glucose in these reactions, temporarily storing and releasing them into the electron...
Over the many stages of cellular respiration, glucose breaks down into carbon dioxide and water. Electron carriers pick up electrons lost by glucose in these reactions, temporarily storing and releasing them into the electron...
Master Transcription Regulators
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...
The Supercomplexes in the Crista Membrane
The mitochondrial cristae membrane is the primary site for the oxidative phosphorylation (OXPHOS) process of energy conversion mediated through respiratory complexes I to V. These complexes have been widely studied for decades, and it has been proven that they form supramolecular structures called respiratory supercomplexes (SC). These higher-order complexes may be crucial in maintaining the biochemical structure and improving the physiological activity of the individual complexes while...
Energy to Drive Translocation
Mitochondrial protein import is powered by two distinct energy sources: ATP hydrolysis and electrochemical potential across the inner membrane. Newly synthesized precursors are bound by cytosolic chaperones of the Hsp70 family, which guide them to the import receptors on the mitochondrial surface. Utilizing the energy of ATP hydrolysis, Hsp70 chaperones transfer these precursors to the TOM receptors on the mitochondrial outer membrane.
Generally, polypeptides are unfolded by two distinct...
Generally, polypeptides are unfolded by two distinct...
Exon Recombination
The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes.
Exon shuffling follows “splice frame rules.” Each exon has three reading...
Exon shuffling follows “splice frame rules.” Each exon has three reading...
Master Transcription Regulators
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...


