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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

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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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

Daniel M Ramos1, Matthew P Nelson1, Liz Calzada1

  • 1Center for Alzheimer's and Related Dementias, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA.

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。

我们开发了一种可诱导的CRISPRi系统,用于从诱导多能干细胞 (iPSC) 衍生的神经元中基因敲除. 这种工具可以发现神经元特异性疾病修饰剂和潜在的治疗点.

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科学领域:

  • 干细胞生物学 干细胞生物学
  • 基因组工程是基因组工程.
  • 神经科学是一个神经科学.

背景情况:

  • iPSC神经退行性疾病倡议 (iNDI) 是一个大型项目,使用诱导多能干细胞 (iPSC) 建模了100多种阿尔茨海默病相关痴呆症 (ADRD) 突变.
  • 克里斯普尔干扰 (CRISPRi) 屏幕对于识别疾病机制是有价值的,但目前的工具并没有针对iPSC衍生的神经元 (iNeurons) 进行优化.

研究的目的:

  • 开发一种Cre-lox可诱导的CRISPRi系统 (CRISPRi-Cre),用于在转基因后i神经元中向基因敲除.
  • 为了能够识别与神经退行性疾病相关的神经元特异性修饰剂.

主要方法:

  • 通过修改dCas9转录抑制器等离子体,用合的STOP磁带构建了一个可诱导Cre的CRISPRi系统.
  • 该系统的功能在iPSC和iNeurons中使用流细胞计和sgRNAs进行了验证.
  • 在iNeurons中进行了全基因组CRISPRi生存选,以评估该系统的广泛适用性.

主要成果:

  • 在CRISPRi-Cre系统证明了dCas9在没有Cre的情况下是不活跃的,并且在Cre传递到iNeurons时具有强大的基因淘汰.
  • 使用CRISPRi-Cre进行全基因组选,确定了已知的和新的神经元特异性基因调节者.
  • 该系统成功地发现了以前的CRISPRi屏幕中没有发现的神经元特定的命中.

结论:

  • 一个强大的CRE诱导CRISPRi系统被开发用于iPSC衍生的神经元中的转基因后基因淘汰.
  • 这种工具有助于发现神经元特异性疾病机制,修饰剂和治疗点.
  • 该CRISPRi-Cre系统增强了相关细胞模型中神经退行性疾病的研究.