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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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Pneumonia II: Pathophysiology01:29

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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
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Mouse Footpad Inoculation Model to Study Viral-Induced Neuroinflammatory Responses
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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

Dallin Dressman1,2, Edric D Winford1,3, Badri N Vardarajan1,2,4

  • 1Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University, New York, NY, USA.

Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 25, 2025
PubMed
概括
此摘要是机器生成的。

保持较高比例的天真CD8+T细胞和降低T细胞细胞毒性可能会防止阿尔茨海默病 (AD) 中的大脑缩和认知衰退. 这种免疫特征与中年成年人皮质厚度增加有关.

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科学领域:

  • 免疫学 免疫学 免疫学
  • 神经科学是一个神经科学.
  • 遗传学 是一个遗传学.

背景情况:

  • 老龄化和阿尔茨海默氏症 (AD) 的免疫反应各不相同,受遗传学,社会经济地位,种族和种族的影响.
  • 了解与生物和认知衰老相关的免疫表型可以揭示AD风险因素和潜在的治疗点.

研究的目的:

  • 调查免疫细胞表型和多民族队列中的认知/大脑衰老标志物之间的相关性.
  • 识别可能影响阿尔茨海默病风险和进展的免疫过程.

主要方法:

  • 从205名参与者 (年龄29-81岁) 的439,000多个免疫细胞中单细胞RNA和T/B细胞受体的测序.
  • 分析了86名参与者的等离子体蛋白质组学数据.
  • 评估免疫细胞比例,T细胞扩张,基因表达,认知得分和皮质厚度之间的相关性,控制人口统计.

主要成果:

  • 更高的皮层厚度与增加的天真和粘膜相关的不变T (MAIT) CD8+ T细胞以及减少的效能记忆细胞有关.
  • 更大的皮层厚度与降低的T细胞克隆扩张和T细胞亚型中的抗原呈现/细胞毒性基因的表达率较低有关.
  • 较高的认知分数与马-三角形T细胞中细胞毒性,抗原呈现和抗菌防御基因的表达减少有关.

结论:

  • 较高的天真CD8+T细胞比例和降低的T细胞细胞毒性基因表达与AD相关的大脑区域的皮质厚度较大相关,而不依赖年龄.
  • 针对天真T细胞维护和T细胞细胞毒性/扩张的治疗策略可能在衰老和AD中提供神经保护和认知益处.