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Infection01:20

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When a pathogen enters the body and reproduces, it can cause an infection, damage body cells, and cause illness symptoms that eventually lead to disease. Therefore, its prevention requires breaking the chain of infection.
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基础科学和病原发生学

Liyong Wang1, Wanying Xu2, Maria C Robayo1

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此摘要是机器生成的。

欧洲血统显示出更强的APOE基因相互作用,这可能解释了阿尔茨海默氏症风险更高. 非洲祖先抑制了这些相互作用,揭示了阿尔茨海默病的祖先特异性调节机制.

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科学领域:

  • 基因组学就是基因组学.
  • 神经科学是一个神经科学.
  • 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:

  • APOEε4等位基因是阿尔茨海默病 (AD) 的主要遗传风险因素.
  • APOEε4的效应大小因祖先种群而异,非西班牙裔白人比非裔美国人更大.
  • 在APOE周围的本地祖先 (LA) 影响遗传风险和基因表达,欧洲 (EU) LA与非洲 (AF) LA相比具有更高的风险和表达.

研究的目的:

  • 为了研究不同祖先背景的APOE位点的3D基因组结构.
  • 为了检查APOE中的染色质相互作用如何在欧洲和非洲当地祖先之间存在差异.

主要方法:

  • 在额叶皮层和iPSC衍生的微质细胞 (iMGLs) 上利用了增强的Hi-C捕获分析 (eHiCA).
  • 在APOE中分析了来自具有同卵性非洲 (AF) 和欧洲 (EU) LA的ε4/ε4载体的样本.
  • 使用HiCorr和DeepLoop处理的Hi-C数据用于增强的染色体相互作用映射.

主要成果:

  • 在前皮层的APOE位置和iMGL中观察到祖先偏差的染色体相互作用.
  • 在EU LA中表现出显著的长距离染色体相互作用 (190 kb和440 kb的APOE下游),而不是在AF LA中.
  • 在AFLA中,长距离相互作用被抑制,在两种祖先中只存在短距离相互作用.

结论:

  • 与AF基因组相比,EU基因组在APOE表现出更强烈和更多的染色质相互作用.
  • 这些相互作用与欧盟LA中染色质可访问性增加相关,这可能解释了欧盟大脑中APOEε4表达的增加.
  • eHiCA确定了祖先偏见的染色体相互作用,提供了对AD调节机制和更广泛的AD调节格局的见解.