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相关概念视频

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.
The chain begins with pathogens: bacteria, viruses, fungi, prions, or parasites such as protozoa helminths. These can be present on the skin as transient or resident flora, or they can be acquired from the environment. Identifying and treating the type of infection and...
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Urinary Tract Infection II: Pathophysiology01:25

Urinary Tract Infection II: Pathophysiology

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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: Pathogenesis01:23

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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 Infection01:26

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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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Defense Against Bacterial Pathogens01:31

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The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
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基础科学和病原发生学

Mohsen Sharifi Tabar1, Dongyu Wang2, Gina M Peloso2

  • 1The University of Texas Health Science Center at San Antonio, San Antonio, TX, USA.

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此摘要是机器生成的。

遗传因素影响阿尔茨海默病 (AD) 的时间. 这项研究将APOE识别为关键和新型位点,如ROR1,ROR2,ADAMTS8和SHISA6,这表明随着时间的推移对AD发病有着不同的遗传影响.

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科学领域:

  • 遗传学和基因组学 遗传学和基因组学
  • 神经科学是一个神经科学.
  • 精准医学是一门精准的医学.

背景情况:

  • 阿尔茨海默病 (AD) 风险受到复杂的遗传因素的影响,全基因组关联研究 (GWAS) 确定了几个AD相关的位置.
  • 虽然遗传因素在AD发病时间上起作用,但专门关注AD发病时间的GWAS是有限的.

研究的目的:

  • 使用全基因组测序 (WGS) 数据识别与阿尔茨海默病 (AD) 发病时间相关的遗传变异.
  • 为了研究遗传因素在AD发病时间上的作用,跨越多样化的祖先群体.

主要方法:

  • 利用了来自阿尔茨海默氏病测序项目 (ADSP) 和Trans-Omics for Precision Medicine (TOPMed) 计划的数据,其中包括超过14,000名具有时间到AD和WGS数据的个人.
  • 在非西班牙裔白人,黑人和西班牙裔人口中,采用了特定于祖先的考克斯比例危险模型,调整了人口统计和遗传因素.
  • 分析的变体具有小等位基频率 (MAF) >1%.

主要成果:

  • 在ADSP和TOPMed数据集中,APOE地区与AD发病时间的关联最强.
  • 对于映射到ROR1,ROR2,ADAMTS8和SHISA6的变异,涉及神经元发育,突触功能和神经可塑性的基因,已达到全基因组显著性.
  • 在时间到AD的GWAS结果和传统的病例控制GWAS结果之间观察到有限的重叠,除了APOE.

结论:

  • 初步发现证实了APOE在AD发病时间方面的关键作用,并确定了新的潜在位置.
  • 与AD总体风险相比,随着时间的推移,不同的遗传因素可能会影响AD风险.
  • 进一步的元分析,罕见变体评估和多祖先分析正在进行中,以扩大发现.