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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.
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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

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此摘要是机器生成的。

与慢性创伤性脑病变 (CTE) 相关的重复头部冲击可能会通过TDP-43病理导致认知衰退,导致基因错误拼接和EPB41L1和RAP1GAP的蛋白质水平降低.

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科学领域:

  • 神经科学是一个神经科学.
  • 神经病理学神经病理学
  • 遗传学 是一个遗传学.

背景情况:

  • 重复的头部冲击与TDP-43病理有关,特别是在海马和额叶皮质,这是慢性创伤性脑病变 (CTE) 的标志.
  • 在CTE中TDP-43的含有与严重的认知障碍相关,但潜在的机制尚不清楚.
  • 在其他神经退行性疾病 (如ALS和FTLD-TDP) 中,TDP-43病理与基因错误拼接和神秘的外显子表达有关.

研究的目的:

  • 调查CTE中TDP-43病理是否有助于基因错误拼接,选择性蛋白质损失和随后的神经退行.
  • 为了确定受误组合和CTE中蛋白质减少影响的特定基因,并包括TDP-43.
  • 探索这些分子变化与CTE认知障碍之间的关联.

主要方法:

  • 对212名脑捐赠者进行了检查,他们有CTE和TDP-43包括在内的重复头部撞击史.
  • 在背侧前额皮质上进行了大量RNA测序和蛋白质组学.
  • 使用LeafCutter在CTE病例中分析了使用LeafCutter分析的变量拼接事件,其中包括 (CTE-TDP) 和没有TDP-43在海马体或额叶皮层的入.

主要成果:

  • 51%的CTE病例 (72/142) 呈现TDP-43的包括 (CTE-TDP).
  • 在CTE-TDP中的836个基因中发现了改变的拼接,与CTE相比 (FDR<0.01),其中23个与ALS/FTLD-TDP重叠.
  • 在CTE-TDP中观察到EPB41L1和RAP1GAP的蛋白质水平显著降低,与TDP-43负载相关,并与痴呆症相关.

结论:

  • EPB41L1和RAP1GAP对于突触可塑性和信号传递至关重要.
  • 基因错误拼接和EPB41L1和RAP1GAP的蛋白质表达减少可能导致TDP-43病理的CTE神经退行和认知缺陷.
  • 这些发现阐明了潜在的分子机制,将头部创伤,TDP-43病理和CTE的认知障碍联系起来.