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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

Lavinia Perquim1, Marco Antônio De Bastiani1, Oak Hatzimanolis2

  • 1Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil.

Alzheimer's & dementia : the journal of the Alzheimer's Association
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概括
此摘要是机器生成的。

在阿尔茨海默氏病 (AD) 的小鼠模型中,失调的循环RNA (circRNAs) 随疾病严重程度的增加而增加. 这些发现揭示了影响AD相关基因的保护性调节网络,为疾病机制提供了洞察力.

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科学领域:

  • 基因组学就是基因组学.
  • 神经科学是一个神经科学.
  • 分子生物学分子生物学

背景情况:

  • 非编码RNAs,包括circRNAs和miRNAs,是重要的基因表达调节者.
  • 对circRNAs和miRNAs的异常表达与阿尔茨海默病 (AD) 病原发生有关.
  • 海马,一个易受阿尔茨海默病影响的大脑区域,正在研究circRNA变化.

研究的目的:

  • 为了评估转基因AD小鼠模型海马中的circRNA转录变化.
  • 探索circRNAs,miRNAs和mRNAs在AD中的综合调节作用.
  • 识别与AD相关的保存的circRNA及其下游目标.

主要方法:

  • 使用NCBI数据集,在4,6和8个月的APPswe/PSEN1dE9小鼠中分析海马环RNA.
  • 通过CIRI2算法识别circRNA,并使用DESeq2 (p<0.01) 进行差异表达分析.
  • 构建circRNA-miRNA调节网络 (circFunBase) 和miRNA-mRNA相互作用 (miRDB),然后进行基因本体学 (GO) 丰富分析.

主要成果:

  • 分别在4,6和8个月时识别了41,82和425个差异表达的环RNA.
  • 在不同年龄组中,有18个circRNA被持续改变,包括circRNA HOMER1,它与36个miRNA相互作用.
  • 这些miRNA针对1682个基因,GO分析揭示了51个与AD病理生理学相关的相关本体学.

结论:

  • 在APPswe/PSEN1dE9模型中,循环RNA失调随着疾病进展而升级,反映了人类的发现.
  • 该研究强调了保存的circRNA及其与miRNA和mRNA的调节相互作用.
  • 确定的途径包括神经分化,GABAergic信号传递,应激反应和神经炎症,为脆弱大脑区域的AD机制提供了洞察力.