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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: 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.
Phagocytes
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基础科学和病原发生学

Hidetomo Tanaka1, Lauren E Black2, Shelley L Forrest1

  • 1Tanz Centre for Research in Neurodegenerative Disease and Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada.

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概括
此摘要是机器生成的。

慢性创伤性脑病变 (CTE) 中重复的头部冲击会导致脊髓中的陶氏体病理,以及其他错误折叠的蛋白质,如TDP-43,Aβ和α-Syn. 星球细胞病理是CTE脊髓的一个独特特征.

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科学领域:

  • 神经科学是一个神经科学.
  • 神经病理学神经病理学

背景情况:

  • 慢性创伤性脑病变 (CTE) 与大脑tau病理有关,但脊髓蛋白质异常的理解不足.
  • CTE通常与其他神经退行性疾病同时发生,使诊断和理解复杂化.

研究的目的:

  • 调查CTE患者脊髓中错误折叠蛋白病理的存在和特征.
  • 为了比较CTE中脊髓病理与阿尔茨海默病 (AD) 和对照病例.

主要方法:

  • 28例脊髓组织 (14例CTE,6例AD,1例重复头部撞击,7例对照) 通过免疫组织化学分析.
  • 针对的特定标记物包括酸化 (p-tau),TDP-43,α-synuclein (α-Syn) 和β-粉样蛋白 (Aβ).

主要成果:

  • 错误折叠的蛋白质沉积在CTE脊髓中普遍存在:p-tau (100%),Aβ (93%),p-TDP-43 (64%) 和α-Syn (50%).
  • 在86%的CTE病例中观察到突出的星性病理,AD和对照组中缺少这一特征.
  • 观察到Aβ沉积的脑脊髓差异,脊髓中的α-Syn病理与大脑中的Lewy体病理相关.

结论:

  • 重复的创伤事件可以诱导脊髓的病态,除了大脑.
  • 脊髓中的星细胞病理是CTE的潜在独特生物标志物.
  • 在CTE脊髓中出现多个错误折叠的蛋白质的同时发生表明,重复头部创伤对蛋白质聚合有更广泛的影响.