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相关概念视频

Heterochromatin02:38

Heterochromatin

12.5K
The extent of chromatin compaction can be studied by staining chromatin using specific DNA binding dyes. Under the microscope, the dense-compacted regions that take up more dye are called heterochromatin. Heterochromatin is further classified into two forms – constitutive heterochromatin and facultative heterochromatin.
Constitutive heterochromatin: It is a highly compact region of chromatin that is mostly concentrated in the centromere and telomere. Unlike euchromatin, the amino acid at...
12.5K
Euchromatin01:01

Euchromatin

6.9K
The extent of chromatin compaction can be studied by staining chromatin using specific DNA binding dyes. Under the microscope, the dense-compacted regions take up more dye, appearing darker, while the less-compact areas take up less dye and appear lighter. Based on the compaction level, chromatins are classified into two primary forms – euchromatin and heterochromatin.
Euchromatin is the less dense region of the chromatin and stains lighter. Euchromatin contains histone H3 extensively...
6.9K
Chromatin Modification in iPS Cells01:32

Chromatin Modification in iPS Cells

1.6K
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...
1.6K

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相关实验视频

Updated: Jun 26, 2025

Mapping Genome-wide Accessible Chromatin in Primary Human T Lymphocytes by ATAC-Seq
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追踪单细胞进化使用时钟式的染色质可访问性位点.

Yu Xiao1,2, Wan Jin2,3, Lingao Ju2

  • 1Department of Urology, Zhongnan Hospital of Wuhan University, Wuhan, China.

Nature biotechnology
|May 9, 2024
PubMed
概括
此摘要是机器生成的。

EpiTrace使用单细胞染色质可访问性测序 (scATAC-seq) 来测量细胞年龄和追踪发育系. 这种方法分析了开放的钟形位置,以揭示各种组织和物种的生物见解.

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科学领域:

  • 基因组学就是基因组学.
  • 发展生物学 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.

背景情况:

  • 单细胞染色体可访问性测序 (scATAC-seq) 用于基于细胞表型的发育轨迹重建.
  • 推断精确的发育轨迹仍然是细胞生物学中的一个重大挑战.
  • 与年龄相关的DNA甲基化 (DNAm) 变化发生在特定的基因组区域,称为时钟式微分甲基化位点 (ClockDML).

研究的目的:

  • 开发一种新的方法,EpiTrace,用于确定细胞年龄,并使用scATAC-seq数据进行血统追踪.
  • 为了利用细胞分裂后钟形位置的染色质可访问性减少的异质性,作为线粒体年龄的衡量标准.
  • 为了验证EpiTrace与已建立的发育层次结构和其他谱系追踪方法的一致性.

主要方法:

  • 开发了EpiTrace,一种分析scATAC-seq数据的计算方法.
  • 量化了开放的钟形位置的分数,以推断细胞年龄.
  • 应用EpiTrace跨多种细胞系和物种,包括血液形成,器官发育和瘤生物学.

主要成果:

  • EpiTrace成功地确定了细胞年龄,并重建了发育轨迹.
  • 该方法与已知的发育层次结构有很强的一致性.
  • 结果与基于DNA甲基化的时钟相对应,并补充了其他谱系追踪技术,如基于突变的追踪和RNA速度.

结论:

  • 使用scATAC-seq.EpiTrace提供了一个强大的工具,用于确定细胞年龄和使用scATAC-seq.追踪血统.
  • 该方法提供了有价值的生物学见解,在发育,免疫力和癌症等领域具有潜在的临床相关性.
  • 通过整合表观遗传和染色质可访问性数据,EpiTrace提高了我们对细胞过程的理解.