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相关概念视频

Spreading of Chromatin Modifications02:25

Spreading of Chromatin Modifications

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The histone proteins in the nucleosomes are post-translationally modified (PTM) to increase or decrease access to DNA. The commonly observed PTMs are methylation, acetylation, phosphorylation, and ubiquitination of lysine amino acids in the histone H3 tail region. These histone modifications have specific meaning for the cell. Hence, they are called "histone code". The protein complex involved in histone modification is termed as "reader-writer" complex.
Writers
The writer...
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Chromatin Modification in iPS Cells01:32

Chromatin Modification in iPS Cells

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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...
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Histone Modification02:32

Histone Modification

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The histone proteins have a flexible N-terminal tail extending out from the nucleosome. These histone tails are often subjected to post-translational modifications such as acetylation, methylation, phosphorylation, and ubiquitination. Particular combinations of these modifications form “histone codes” that influence the chromatin folding and tissue-specific gene expression.
Acetylation
The enzyme histone acetyltransferase adds acetyl group to the histones. Another enzyme, histone...
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Chromatin Structure Regulates pre-mRNA Processing02:41

Chromatin Structure Regulates pre-mRNA Processing

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In eukaryotic cells, nascent mRNA transcripts need to undergo many post-transcriptional modifications to reach the cell cytoplasm and translate into functional proteins. For a long time, transcription and pre-mRNA processing were considered two independent events that occur sequentially in the cell. However, it has now been well established that transcription and pre-mRNA processing are two simultaneous processes that are precisely regulated inside the cell.
The chromatin structure, especially...
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Epigenetic Regulation01:37

Epigenetic Regulation

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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...
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Inheritance of Chromatin Structures03:17

Inheritance of Chromatin Structures

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Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying...
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相关实验视频

Updated: Sep 19, 2025

Isolation and Cultivation of Neural Progenitors Followed by Chromatin-Immunoprecipitation of Histone 3 Lysine 79 Dimethylation Mark
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Isolation and Cultivation of Neural Progenitors Followed by Chromatin-Immunoprecipitation of Histone 3 Lysine 79 Dimethylation Mark

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神经发育中的染色体修饰剂

Sarallah Rezazadeh1, Hong Ji2, Cecilia Giulivi3,4

  • 1Department of Neurology, Icahn School of Medicine at Mount Sinai, New York, NY, United States.

Frontiers in molecular neuroscience
|June 5, 2025
PubMed
概括
此摘要是机器生成的。

染色体调节器在大脑发育和神经系统疾病中至关重要. 针对这些机制提供了治疗神经系统功能障碍的潜力,甚至在晚年.

关键词:
通过DNA甲基化.自闭症自闭症是什么皮质形成的原因是皮质生成.表观遗传学是指表观遗传学.智力障碍 智力障碍是一种智力障碍.神经发育的神经发育

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Repressing Gene Transcription by Redirecting Cellular Machinery with Chemical Epigenetic Modifiers

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Author Spotlight: Enhancements in Gene Expression Regulation Research
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相关实验视频

Last Updated: Sep 19, 2025

Isolation and Cultivation of Neural Progenitors Followed by Chromatin-Immunoprecipitation of Histone 3 Lysine 79 Dimethylation Mark
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Repressing Gene Transcription by Redirecting Cellular Machinery with Chemical Epigenetic Modifiers
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Author Spotlight: Enhancements in Gene Expression Regulation Research
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科学领域:

  • 分子生物学分子生物学
  • 神经科学是一个神经科学.
  • 遗传学 遗传学 是一个

背景情况:

  • 新兴的测序研究揭示了染色质调节机制在人类疾病,特别是神经发育和神经系统疾病中的关键作用.
  • 研究强调了染色体调节器在神经发育中的复杂参与,引发了关于这些蛋白质突变如何导致神经系统功能障碍的问题.

研究的目的:

  • 批判性地评估当前对染色质修饰剂的理解,重点关注甲基化.
  • 突出它们在早期大脑发育和神经系统疾病中的关键作用.
  • 激发对具有挑战性的神经疾病的创新治疗方法的进步.

主要方法:

  • 关于染色体修饰剂的现有文献的小综述.
  • 专注于关键的修饰剂:基因组甲基转移酶NSD1和ASH1L,甲基-CpG结合抑制剂MeCP2和酶抑制剂EZH2.2.
  • 评估甲基化在神经发育和神经系统疾病中的作用.

主要成果:

  • 虽然一些染色体修饰剂 (NSD1,ASH1L,MeCP2,EZH2) 的功能已经得到了相对较好的研究,但神经发育中的许多其他功能仍然不太了解.
  • 目前针对染色体修饰剂的现有疗法显示出有前途,其中一些获得了临床成功.
  • 神经功能障碍在以后的生活中可能是可以治疗的,强调染色体修饰剂的治疗潜力.

结论:

  • 染色体修饰剂在早期大脑发育和神经系统疾病中起着关键作用.
  • 优先考虑染色体修饰剂作为治疗点,对于开发创新的治疗方法至关重要.
  • 为了推进治疗策略,需要对不太了解的染色质修饰剂进行进一步的研究.