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相关概念视频

Infection01:20

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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.
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Urinary Tract Infection II: Pathophysiology01:25

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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.
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基础科学和病原发生学

Susan K Rohde1,2,3,4, Maruelle C Luimes2,3,4, Annemieke J M Rozemuller5,6

  • 1Amsterdam UMC, location VUmc, Amsterdam, Netherlands, Amsterdam, Netherlands, Amsterdam, Netherlands.

Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 23, 2025
PubMed
概括
此摘要是机器生成的。

在百岁老人中,阿尔茨海默病的神经病理变化 (ADNC) 和初级与年龄相关的病 (PART) 显示重叠的模式,与年轻人不同. 然而,特定大脑区域的粉样β (Aβ) 和病态与认知能力下降相关.

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科学领域:

  • 神经病理学神经病理学
  • 神经科学是一个神经科学.
  • 衰老研究研究 衰老研究

背景情况:

  • 阿尔茨海默病的神经病理变化 (ADNC) 和初级与年龄相关的病 (PART) 呈现出不同的海马病理模式.
  • 与ADNC相比,PART是一种粉样β (Aβ) 独立的陶病,CA2/CA1高酸化陶 (pTau) 比率较高.
  • 这些明显的模式在极端年龄的持续性和它们与百岁老人的认知相关性仍然不清楚.

研究的目的:

  • 为了调查不同的海马pTau分布是否会持续到极端的年龄.
  • 检查海马Aβ和pTau分布与百岁老人的认知功能之间的相关性.
  • 为了比较百岁老人的神经病理模式与ADNC与PART.

主要方法:

  • 在8个海马和副海马子区域的量化Aβ和pTau负担在112个百岁老人,11个AD和7个PART病例中.
  • 在满足PART与ADNC标准的百岁老人中比较CA2/CA1-pTau比率.
  • 使用13个神经心理测试评估认知表现,并采用强大的线性回归来将病理与认知联系起来.

主要成果:

  • 百岁老人与PART的CA2/CA1-pTau比率与ADNC的人相似,与年轻人不同.
  • 在百岁老人中,CA2/CA1-pTau比率与Aβ负担,Thal阶段或Braak阶段无关.
  • 较高的海马Aβ负担和准海马pTau负担与较低的认知表现有关.

结论:

  • 在最老的老年人中,PART和ADNC的传统决定因素差异较小.
  • 患有ADNC的百岁老人可能会表现出Aβ积累与PART类型的pTau模式,而PART病例可能并不总是显示PART类型的pTau模式.
  • 海马体的Aβ负担和海马体外的pTau负担与认知能力下降有关,这表明亚区域的脆弱性.