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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.
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 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.
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基础科学和病原发生学

Meenakshi Umar1, Saifudeen Ismael1, Gregory J Bix1,2,3

  • 1Department of Neurosurgery, Clinical Neuroscience Research Center, Tulane University School of Medicine, New Orleans, LA, USA.

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概括
此摘要是机器生成的。

SARS-CoV-2 感染会加剧MTHFR 缺乏,导致血脑屏障问题和神经炎症. 这可能会增加帕金森氏症.

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科学领域:

  • 神经科学是一个神经科学.
  • 病毒学 病毒学
  • 遗传学 是一个遗传学.

背景情况:

  • 甲四叶酸减少酶 (MTHFR) 对单碳代谢至关重要,影响神经递质合成和DNA甲基化.
  • MTHFR多态性与血管痴呆,帕金森病 (PD) 和COVID-19严重程度的增加有关.
  • 缺乏MTHfr的小鼠表现出认知缺陷和增加PD类病理.

研究的目的:

  • 为了调查SARS-CoV-2感染是否在MTHFR缺乏的小鼠中加速血管痴呆和PD.
  • 模拟MTHFR缺乏对SARS-CoV-2引起的神经效应的影响.

主要方法:

  • 患有MTHFR缺陷 (Mthfr+/-) 和野生型 (WT) littermates的小鼠感染了适应小鼠的SARS-CoV-2 (MA10) 或模拟病毒.
  • 监测小鼠减肥情况,并分析组织病毒载量,炎症,血脑屏障 (BBB) 完整性和PD标志物.
  • 进行了血代谢分析,以评估生化变化.

主要成果:

  • 在Mthfr+/-和WT小鼠中,MA10感染导致了类似的体重减轻和肺病毒标位,没有可检测的脑病毒.
  • Mthfr+/-小鼠表现出增加的BBB干扰,神经炎症 (IL-1β,微质) 和降低的血多巴胺.
  • 在Mthfr+/-小鼠中,SARS-CoV-2感染降低了多巴氨基神经元和铁酸酶水平,同时增加了Mthfr+/-小鼠中的α-synuclein.

结论:

  • 在MTHFR缺乏的小鼠中,SARS-CoV-2感染会诱导BBB功能障碍,神经炎症和多巴胺减少.
  • 这项研究表明,在SARS-CoV-2感染后,MTHFR缺乏的人群中,帕金森病进展的风险增加.