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相关概念视频

Epigenetic Regulation01:46

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Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
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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.
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EpiAgent:为单细胞表观基因组学的基础模型.

Xiaoyang Chen1, Keyi Li1, Xuejian Cui1

  • 1Ministry of Education Key Laboratory of Bioinformatics, Bioinformatics Division at the Beijing National Research Center for Information Science and Technology, Center for Synthetic and Systems Biology, Department of Automation, Tsinghua University, Beijing, China.

Nature methods
|September 25, 2025
PubMed
概括
此摘要是机器生成的。

EpiAgent是一种用于分析单细胞ATAC测序 (scATAC-seq) 数据的新基础模型. 它有效地编码细胞染色质模式,有助于细胞类型的注释和预测细胞对干扰的反应.

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科学领域:

  • 基因组学就是基因组学.
  • 计算生物学 计算生物学
  • 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:

  • 使用测序 (scATAC-seq) 检测转化酶可访问染色质的单细胞测定对于理解细胞转录调节至关重要.
  • 当前的计算方法难以应对scATAC-seq数据的复杂性和多样化的应用.

研究的目的:

  • 为 scATAC-seq 数据分析开发一种复杂而通用的计算方法.
  • 引入EpiAgent,这是一个旨在解决现有工具局限性的基础模型.

主要方法:

  • 在大型的人类-scATAC-Corpus上进行了EpiAgent的预训练.
  • 该模型使用双向注意力将染色质可访问性编码为"细胞句子".
  • 它在诸如特征提取,细胞类型注释和数据归算等任务上进行了基准测试.

主要成果:

  • 在无监督特征提取,监督细胞类型注释和数据归算方面,EpiAgent表现出卓越的性能.
  • 该模型成功地预测了细胞对遗传干扰的反应,并集成了参考数据.
  • EpiAgent通过in silico cis-regulatory元素淘汰表现出模拟细胞状态变化的潜力,并启用零射击细胞类型注释.

结论:

  • EpiAgent为scATAC-seq数据分析提供了一种强大且可适应的基础模型.
  • 它增强了对细胞异质性和调控网络的理解.
  • 该模型具有广泛的应用,包括响应预测,数据集成和细胞类型注释.