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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

Cystic Fibrosis: Pathogenesis

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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.
CF is primarily caused by a genetic mutation in a chromosome 7 gene coding for the cystic fibrosis transmembrane conductance regulator (CFTR) protein. The most common gene mutation leading to CF is the ΔF508 mutation,...
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The pathophysiology of pneumonia involves the following steps:
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Stages of Infection01:26

Stages of Infection

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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

Defense Against Bacterial Pathogens

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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
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
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相关实验视频

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Mouse Footpad Inoculation Model to Study Viral-Induced Neuroinflammatory Responses
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基础科学和病原发生学

Fulin Ma1, Rody Kingston1, Eliana Brenner1

  • 1University of Pittsburgh, Pittsburgh, PA, USA.

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

这就是阿尔茨海默病的原因.

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科学领域:

  • 神经科学是一个神经科学.
  • 分子生物学分子生物学
  • 遗传学 是一个遗传学.

背景情况:

  • 阿尔茨海默病 (AD) 通常影响65岁以上的人.
  • 粉样蛋白前体蛋白 (APP) 是AD病理学的核心,但它的Aβ独立作用还未得到充分研究.
  • 这项研究将APP视为一种因各种压力而升高的损伤反应蛋白.

研究的目的:

  • 研究阿尔茨海默病 (AD) 中的DNA损伤和粉样蛋白前体蛋白 (APP) 之间的关系.
  • 探索全长APP在阿尔茨海默病发病过程中的潜在作用,除了与粉样β (Aβ) 的关联之外.

主要方法:

  • 在小鼠大脑和培养神经元上利用免疫细胞化学.
  • 使用53BP1,γ-H2AX和TUNEL等标记物追踪DNA损伤.
  • 使用的lentiviruses用于过度表达人类APP和BACE1/γ-分泌酶抑制剂来调节Aβ生产.

主要成果:

  • 神经元刺激和诱导的DNA损伤都会增加APP的表达.
  • 过度表达APP会导致神经元和AD小鼠模型中的DNA损伤增加.
  • 抑制Aβ生产的抑制剂阻断了APP诱导的DNA损伤,但直接的Aβ应用没有,这表明APP细胞内域 (AICD) 有作用.

结论:

  • 建立了DNA损伤,衰老的标志和APP,AD的标志之间的双向联系.
  • 通过其与DNA损伤的联系,确定了全长APP在AD病变发生中的新型作用.
  • 提出了一种涉及APP和DNA损伤的前循环机制,这可能会推动AD的进展.