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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.
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在学习和记忆中的表观遗传学.

Brigitte van Zundert1,2,3, Martin Montecino4,5

  • 1Faculty of Medicine and Faculty of Life Sciences, Institute of Biomedical Sciences (ICB), Universidad Andres Bello, Santiago, Chile. bvanzundert@unab.cl.

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概括
此摘要是机器生成的。

记忆的形成涉及engram细胞中的特定基因调节. 表观遗传修饰和3D基因组组织控制基因表达波对记忆和认知健康至关重要.

关键词:
3D染色体架构的3D染色体架构脑子 脑子 脑子 脑子认知 认知是一种认知.英格拉姆 (Engram) 是一个电子书.增强者促销者互动的互动.流行病药物 流行病药物表观遗传编辑 在表观遗传编辑.表观基因组是一个表观基因组.突触突触是一个突触突触.

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科学领域:

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

背景情况:

  • 记忆的形成依赖于经历物理/化学变化的恩格拉姆细胞.
  • 突触传输在学习阶段 (获取,巩固,回忆) 诱导基因调节.
  • NMDAR-Ca2+-CREB途径通过表观遗传修饰和染色体组织影响基因表达.

研究的目的:

  • 研究调控即时早期基因 (IEG) 和可塑性相关基因 (PRG) 在记忆电图中的表达的分子机制.
  • 探索表观遗传学和3D基因组架构在控制记忆形成期间的基因转录中的作用.
  • 了解这些机制如何促进长期记忆和认知功能.

主要方法:

  • 使用了取决于活动的engram标记策略 (例如,TRAP小鼠).
  • 采用多omics分析,包括RNA-seq,ChiP-seq,ATAC-seq和Hi-C.
  • 在小鼠的背景恐惧条件化 (CFC) 后,研究了英格拉姆细胞中的基因表达变化.

主要成果:

  • 相关的表观基因组景观和3D基因组架构与engram细胞中的转录波发生变化.
  • 证明了特定表观遗传机制在控制基因转录波中的作用.
  • 突出了3D染色体组织在调节记忆合奏中的基因表达中的重要性.

结论:

  • 表观遗传修饰和3D基因组组织对于调节记忆细胞中的基因转录至关重要.
  • 这些分子机制对长期记忆的形成和回忆至关重要.
  • 了解这些过程可以为治疗阿尔茨海默病等认知障碍的策略提供信息.