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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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基础科学和病原发生学

S Dahyun Park1, Cheryl R McCreary1, Myrlene Gee2

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大脑粉样性血管病变 (CAA) 和阿尔茨海默病 (AD) 显示淋巴清除受损,脑血管反应性降低 (CVR). 这些CAA和AD的血管变化可能源于血液流动动态的改变,而不是扩张能力.

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科学领域:

  • 神经成像是一种神经成像.
  • 神经学 神经学
  • 脑血管疾病 脑血管疾病

背景情况:

  • 大脑粉样蛋白血管病变 (CAA) 涉及大脑血管中的粉样蛋白β沉积,增加出血和痴呆风险,并且在阿尔茨海默病 (AD) 中很常见.
  • 缺陷的淋巴清除和降低的脑血管反应率 (CVR) 是对粉样β沉积的假设贡献者.
  • 之前的研究并未在患有CAA或AD的患者中同时研究这些因素.

研究的目的:

  • 为了研究CAA和AD患者的淋巴功能和CVR.
  • 在这些患者群体中探索淋巴功能和CVR之间的关系.

主要方法:

  • 在43名CAA患者,16名AD患者和53名健康对照 (HC) 进行了MRI,包括沿周血管空间 (DTI-ALPS) 进行扩散张力成像和具有超性挑战的BOLD成像.
  • 使用DTI-ALPS量化了淋巴功能,CVR被测量为BOLD信号的百分比变化,每mmHg增加尾潮CO2.
  • 根据年龄,性别和高血压进行调整的统计分析.

主要成果:

  • 与HC相比,CAA和AD患者的DTI-ALPS和CVR显著降低 (p < 0.001).
  • 在研究组中,DTI-ALPS与灰质,白质或全球CVR之间没有发现显著的关联.
  • CAA和AD参与者主要是男性,年长,高血压率高于HC.

结论:

  • 降低CAA和AD的淋巴功能与大脑血管变化有关.
  • 在CAA和AD中,血管对淋巴功能受损的贡献可能与改变的血管运动和血液流动脉动性有关,而不仅仅是扩张能力.