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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 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

Dietmar Rudolf Thal1, Xiaohang Li2,3, Katerina Konstatoulea4,5

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概括
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与可溶性粉样β (Aβ) 蛋白的相互作用受损,包括细胞骨建模和陪伴功能中的蛋白质,是阿尔茨海默病 (AD) 病理学的早期指标,甚至在症状出现之前.

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科学领域:

  • 神经科学是一个神经科学.
  • 生物化学 生物化学
  • 病理学 病理学 病理学

背景情况:

  • 阿尔茨海默病 (AD) 涉及粉样β (Aβ) 聚合,形成寡合体和斑块.
  • 在Aβ中的聚合倾向区域 (APR) 是聚合期间蛋白质相互作用的关键.
  • 了解人类大脑中与可溶性Aβ相互作用的蛋白质对于AD的发病过程至关重要.

研究的目的:

  • 系统地识别人类皮质中与AD连续体中可溶性Aβ相互作用的蛋白质.
  • 在无症状和症状的AD中调查Aβ互动组的早期变化.
  • 为了将蛋白质相互作用与AD的神经病理阶段相对应.

主要方法:

  • 使用Aβ特异性抗体 (4G8,6E10) 和非特异性对照物的亲密性净化质谱法.
  • 差异表达分析以确定"Aβ相互作用体".
  • 同表达网络分析和诊断组比较,以评估与AD病理学的相关性.

主要成果:

  • 在Aβ相互作用体中确定了129种蛋白质,包括APOE,GFAP,维丁.
  • 发现一种与Aβ严重程度负相关的蛋白质模块.
  • 在早期AD阶段发现了参与细胞骨建模,内细胞分裂,伴侣功能和Rho GTPase活动的蛋白质水平降低.

结论:

  • 亚β与隔膜中的蛋白质的相互作用,克拉特林介导的内细胞分裂,以及伴侣功能在阿尔茨海默病中减少,即使在无症状的个体中也是如此.
  • 可溶性Aβ的生理蛋白结合受损可能是AD发展的早期病原性事件.