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相关概念视频

Infection01:20

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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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Urinary Tract Infection II: Pathophysiology01:25

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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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基础科学和病原发生学

Ryan Douglas Hallam1,2, Natasha K Fletcher1,2, Gregory Foran1,2,3

  • 1Brock University, St. Catharines, ON, Canada.

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概括
此摘要是机器生成的。

大脑衍生神经营养因子 (BDNF) 通过改变BACE1酶分布来减少粉样蛋白前体蛋白 (APP) 的β分裂. 这种机制可能会降低粉样β (Aβ) 的产生,从而提供治疗潜力.

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科学领域:

  • 神经科学是一个神经科学.
  • 分子生物学分子生物学
  • 生物化学 生物化学

背景情况:

  • 大脑衍生神经营养因子 (BDNF) 影响神经元功能和生存.
  • 运动后血清中BDNF的升高降低了粉样蛋白前体蛋白 (APP) 的β分裂,但机制尚不清楚.
  • APP和BACE1的亚细胞局部化影响了APP的处理.

研究的目的:

  • 研究BDNF降低APPβ分裂的机制.
  • 为了确定BDNF对BACE1亚细胞分布的影响.
  • 探索内细胞分裂在BDNF介导的APP处理中的作用.

主要方法:

  • 人类神经母细胞瘤细胞 (SH-SY5Y) 用BDNF或载体进行治疗.
  • 在APP裂变产品 (sAPPα,sAPPβ) 的变化通过西式涂抹进行了评估.
  • 用光标记蛋白和共聚焦显微镜可视化BACE1的亚细胞局部.

主要成果:

  • BDNF治疗降低了sAPPβ水平,并增加了sAPPα/sAPPβ比率.
  • BDNF增加了BACE1与血的同位化,并减少了与内分泌体的同位化.
  • 克拉特林介导的内细胞酶抑制增加了sAPPα裂变,但没有影响sAPPβ水平.

结论:

  • 通过改变BACE1亚细胞分布,BDNF降低了APPβ分裂,促进了血膜局部化和减少了内细胞分裂.
  • 这种效应独立于克拉斯林介导的内细胞分裂.
  • 通过调节BACE1局部化,BDNF可能会减少粉样β (Aβ) 的产生.