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Infection01:20

Infection

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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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The pathophysiology of urinary tract infections (UTIs) encompasses several progressive stages, beginning with bacterial colonization and culminating in potential systemic complications if untreated. UTIs are primarily initiated by bacteria, such as Escherichia coli, which often originate from the gastrointestinal tract and migrate to the urinary system through the periurethral area. This migration can occur via several routes, including improper hygiene practices, sexual activity, or...
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Cystic fibrosis (CF), an autosomal recessive disorder, significantly affects the function of exocrine glands. This genetically inherited disease is characterized by the production of thick and sticky mucus, which can severely affect various organs and systems in the body.
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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

Masataka Kikuchi1, Akinori Miyashita1, Yu Hirota2

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通过微质多原风险评分 (PRS) 分层的阿尔茨海默氏病 (AD) 患者表现出不同的微质反应性. 这种遗传分层突出了基于个体遗传倾向的AD个性化治疗潜力.

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科学领域:

  • 神经科学是一个神经科学.
  • 遗传学 遗传学 是一个
  • 免疫学 免疫学 免疫学

背景情况:

  • 微质在压力环境中表现出多样化的基因表达,并在对粉样β (Aβ) 积累的反应中变得有反应性,这是阿尔茨海默病 (AD) 的标志.
  • TREM2基因突变与AD的微质反应性降低有关,但多基因影响对于理解AD复杂性至关重要.
  • 开发了一种微质多原风险评分 (PRS),以量化多原效应并分层阿兹海默症患者.

研究的目的:

  • 研究由微质PRS分层的AD患者之间的病理差异.
  • 探索多基因影响对AD微质反应的作用.

主要方法:

  • 对死后大脑样本 (n=100) 的分析,用于老年斑块 (SP) 和神经纤维质 (NFT) 的布拉克分期.
  • 额叶皮层的全基因组测序和大量RNA测序 (RNA-seq).
  • 单核RNA-seq (snRNA-seq) 和空间转录组学在样本子集上进行更高分辨率分析.

主要成果:

  • 在低PRS和高PRS组分为两层的AD患者中,发现了112个与自和炎症相关的差异表达基因.
  • 通过snRNA-seq识别出不同的微质,显示出基于PRS的微质对Aβ反应性的显著变化.
  • 空间转录学支持微质反应的异质性,受类似AD病理中的遗传倾向的影响.

结论:

  • 在阿尔茨海默病中,微质反应性随着遗传倾向的强度而变化,即使有类似的病理诊断.
  • 基于PRS的分层提供了一种方法来识别AD患者的独特遗传特征.
  • 遗传分层可能使得针对AD的定制治疗策略的开发成为可能.