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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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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

Sally A Frautschy1,2, Kapil Manglani2,3, Xiaohong Zuo1,4

  • 1Veterans Greater Los Angeles Healthcare System, Los Angeles, CA, USA.

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概括
此摘要是机器生成的。

在老鼠中,SARS-CoV-2尖端蛋白会加剧阿尔茨海默病 (AD) 病理和补充激活,特别是在高血压或ApoE4存在时. 这突出了在风险人群中长期Covid神经症状的潜在机制.

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科学领域:

  • 神经科学是一个神经科学.
  • 免疫学 免疫学 免疫学
  • 病理学 病理学 病理学

背景情况:

  • 持续的症状 (长期Covid) 影响7%的COVID-19幸存者.
  • 在SARS-CoV-2中,尖蛋白与ACE2受体结合,从而激活补充通路.
  • 长期COVID患者表现出AD生物标志物和神经炎症的升高.

研究的目的:

  • 研究高血压和ApoE4对阿尔茨海默病 (AD) 鼠标模型中S1尖端蛋白反应的调节效应.
  • 探索蛋白暴露与AD病理,白质损伤和补充激活之间的联系.

主要方法:

  • 使用AD和混合AD (AD与大脑小血管疾病) 的老鼠模型,有或没有ApoE4.
  • 管理的重组S1蛋白和评估的执行功能,AD病理,白质损伤和补充激活.
  • 在大鼠模型和人类神经冠状病毒患者中开发了高通量血测定器,用于血管和中枢神经系统补充激活.

主要成果:

  • 不管是ApoE还是高血压,S1蛋白增加了粉样蛋白病理,ptau217和补充激活 (C3,C5b-9).
  • 高血压和ApoE4协同作用,恶化尖端诱导的血管病理和白细胞粘附.
  • 尖端蛋白诱导执行功能障碍,白质损伤和补体激活,由先前存在的高血压增强.

结论:

  • 尖蛋白强烈增加AD病理和补充激活,导致突触损失和血脑屏障损伤,在老鼠与先前存在的AD和血管条件.
  • 这些发现与老龄化人口中患有并发症的很大一部分相关.
  • 开发可扩展的测试对神经Covid补充激活可以帮助治疗策略.