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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 (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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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.
Phagocytes
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基础科学和病原发生学

Sathyaseelan Chakkarai1, Mohsen Sharifi Tabar2, Xueqiu Jian1

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

Alzheimer's & dementia : the journal of the Alzheimer's Association
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PubMed
概括
此摘要是机器生成的。

这项研究发现了新的基因位置与环境因素相互作用,影响阿尔茨海默病 (AD) 风险标志物. 可修改的生活方式因素显著影响遗传倾向,为AD提供新的预防和治疗策略.

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科学领域:

  • 神经遗传学 神经遗传学
  • 环境健康 环境健康
  • 医疗成像医学成像

背景情况:

  • 流行病学研究将环境暴露与阿尔茨海默病和相关疾病 (ADRD) 风险联系起来.
  • ADRD的临床前阶段很长,因此对环境破坏和大脑影响的分子机制的理解不佳.
  • 由于定义环境变量和研究异质性,研究基因环境相互作用是复杂的.

研究的目的:

  • 识别对大脑结构环境影响敏感的遗传位点 (变异定量特征位点或vQTL).
  • 为了研究环境因素如何在临床前ADRD标志物中调解基因环境相互作用.
  • 利用英国生物银行数据对基因组,成像和风险因素概况进行全面分析.

主要方法:

  • 利用英国生物库数据 (N=45,275) 来绘制海马体积 (HV),白质超强度 (WMH) 和扩散MRI指标 (FA,MD) 的vQTL.
  • 在表型变异中使用偏差来检测具有环境敏感性的vQTL.
  • 应用线性混合模型来识别通过vQTL关联调解的环境暴露.

主要成果:

  • 确定了五个新的全基因组显著的 WMH 负担位置和 HV 和 FA 的暗示位置.
  • 发现,久坐不动的行为和生活方式因素 (吸烟,酒精) 调解了2q12.3 (ST6GAL2),10p11.22 (ZEB1) 和17p11.2 (EPN2) 位点与WMH.
  • 发现ZEB1调节与炎症性肠道疾病相关的肠道微生物群物种,ST6GAL2是与饮酒相关的炎症生物标志物;脏中的风险基因被降低调节,在脏细胞类型中被丰富.

结论:

  • 确定了与环境因素相互作用的全基因组新型位点,并与阿尔茨海默病的临床前MRI标志物相关.
  • 突出了可修改的生活方式因素对ADRD遗传风险的影响.
  • 基于已识别的基因环境相互作用,提出了潜在的预防和治疗策略,并强调了在多样化的队列中复制的必要性.