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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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Stages of infection describe what happens to a susceptible host once a pathogen invades the human body. The stages of infection are incubation, prodromal, illness, stage of decline, and convalescence. The incubation stage is the period from exposure to a pathogen until symptoms start. The infected person is unaware of impending illness as the pathogens grow and multiply within the body. The duration may vary depending on the type of infection. The incubation period of measles averages ten to...
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基础科学和病原发生学

Aura M Ramirez1, Luciana Bertholim Nasciben1, Sofia Moura1

  • 1University of Miami Miller School of Medicine, Miami, FL, USA.

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概括
此摘要是机器生成的。

祖先显著影响阿尔茨海默病 (AD) 基因调节,特别是在像星球细胞和神经元这样的大脑细胞中. 了解这些祖先特异性差异是开发针对性AD治疗的关键.

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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.
  • 人口遗传学 人口遗传学

背景情况:

  • 全基因组关联研究 (GWAS) 揭示了阿尔茨海默病 (AD) 的遗传变异,在不同人群中具有不同的影响大小.
  • 基因组调节架构 (GRA) 的差异有助于这种变异性.
  • 当地祖先对AD风险的影响在APOE4载体中明显.

研究的目的:

  • 研究AD GWAS基因的祖先和细胞类型特定的调控格局.
  • 使用来自不同祖先 (非洲人,美洲印第安人,欧洲人) 的诱导多能干细胞 (iPSC) 衍生的神经球体.

主要方法:

  • 从具有定义全球祖先的个体的外周血液单核细胞 (PBMC) 生成的iPSC系.
  • 将IPSCs分化为神经球体,其中包含星体细胞,神经元和寡细胞.
  • 进行了多原子分析 (scATAC-seq,scRNA-seq,Hi-C) 来分析依赖于祖先的GRA.

主要成果:

  • 天体细胞显示出差异表达AD GWAS基因 (DEAGG) 的数量最多,其次是神经元.
  • 印第安人的祖先比较在所有细胞类型中产生了最多的DEAGG.
  • 像APOE,PSEN2,SORL1和TMEM106B这样的关键AD基因在特定的细胞类型和祖先中表现出差异性表达.

结论:

  • 祖先在塑造AD相关基因的调节格局方面发挥着关键作用,特别是在星球细胞和神经元中.
  • 这些发现有助于更好地理解AD中的祖先特异性GRA.
  • 为阿尔茨海默病的精准医学方法提供了基础.