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临床表现 临床表现

Kelly Rombauts1,2,3, Johan Skoog1,2,3, Tobias Skillbäck1,2,3

  • 1Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.

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概括

较低的粉样蛋白-β42/40 (Aβ) 水平与老年人更快的认知处理速度下降有关. 女性表现出比男性慢的认知衰退率,独立于Aβ水平.

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科学领域:

  • 神经学 神经学
  • 老年学是一门学科.
  • 生物化学 生物化学

背景情况:

  • 在临床前阿尔茨海默氏症中早期发现认知能力下降对于干预至关重要.
  • 大脑脊髓液 (CSF) 中的粉样蛋白-β42/40 (Aβ) 的比例是一个潜在的生物标志物.
  • 需要对基于人口的群体进行纵向研究,以了解Aβ在认知衰老中的作用.

研究的目的:

  • 在70岁的70岁人群中,研究脑脊液Aβ42/40水平与5-7年内认知衰退之间的关联.
  • 检查特定认知领域的变化和复合认知评分.
  • 为了探索潜在的认知衰退率的性别差异.

主要方法:

  • 在H70哥德堡出生队列研究中,对250名参与者 (起始年龄为70岁) 的CSF Aβ42,Aβ40,t-tau和p-tau进行分析.
  • 认知功能通过11个神经心理测试在6个领域进行评估,结合成一个复合得分.
  • 多重线性回归模型根据年龄,性别和教育情况进行调整,以评估Aβ42/40与认知变化的关联.

主要成果:

  • 较低的CSF Aβ42/40水平与处理速度 (β=0.123) 的较大下降相关.
  • 在Aβ42/40与其他认知领域的变化或复合得分之间没有发现显著的关联.
  • 与男性相比,女性的综合认知评分下降速度较慢 (β=0.248),独立于Aβ42/40.

结论:

  • 减少的CSF Aβ42/40可能会先于更广泛的认知衰退,特别影响处理速度.
  • 在70至76岁之间,女性的认知能力下降的进展比男性慢.
  • 脑脊髓Aβ42/40比率是早期认知变化的相关生物标志物,特别是处理速度下降.