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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...
524
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

Pneumonia II: Pathophysiology

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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

Updated: Jan 8, 2026

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

Yi Lu1, Xuebao Wang1, Nicholas F Fitz1

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

Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 24, 2025
PubMed
概括

在阿尔茨海默氏症中使用贝克萨罗治疗.

科学领域:

  • 神经科学是一个神经科学.
  • 基因组学就是基因组学.
  • 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.

背景情况:

  • 贝克萨罗是一种视网膜X受体 (RXR) 激动剂,在阿尔茨海默氏病 (AD) 模型中显示出神经保护潜力.
  • RXR激活影响神经发育,神经炎症和新陈代谢中的关键基因网络,对大脑功能至关重要.
  • 了解贝克萨罗对AD染色体结构和基因活性的影响对于治疗开发至关重要.

研究的目的:

  • 调查贝克萨罗对APP/PS1 AD小鼠模型大脑中的染色质可访问性和基因表达的影响.
  • 在贝克萨罗治疗后,在单细胞分辨率下绘制转录组和表观组变化的地图.
  • 在AD大脑中识别受RXR激活影响的细胞类型特定调节网络.

主要方法:

  • 单细胞RNA测序 (scRNA-seq) 和单核ATAC测序 (snATAC-seq) 在贝克萨罗治疗和载体治疗的APP/PS1小鼠的大脑细胞上进行.
  • 使用ArchR管道的数据整合确定了细胞群,差异可访问的染色体区域和细胞类型特异的转录因子 (TF).
  • 使用TOBIAS,TF-COMB分析了TF活动和监管网络,并使用ChIP-seq.验证.

主要成果:

  • 一个全面的单细胞地图揭示了贝克萨罗在37,640个细胞和61,353个细胞核中引起的转录组和表观组变化.

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  • 微细胞和内皮细胞显示出最显著的变化,与与发育功能相关的基因发生了变化.
  • 分析确定了RXR和异构体结合活性,阐明了贝克沙罗作用背后的转录调节机制.

    • 结论:

    • 在AD模型中,贝克萨罗调节RXR控制的基因网络在关键的大脑细胞类型中,包括微质细胞和内皮细胞.
    • 综合的多omics数据提供了关于RXR激活如何通过调节神经炎症和粉样蛋白病理来恢复大脑平衡的见解.
    • 这项研究强调了TF信号通路的治疗潜力,特别是RXR激活,用于阿尔茨海默病治疗.