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遗传变异影响白质超强度 (WMH) 与阿尔茨海默病 (AD) 的相关性. 18号染色体上的特定单核酸多态 (SNP) 修改了这种关系,表明小核RNA (snRNA) 在AD病变发生过程中发挥了作用.

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科学领域:

  • 神经遗传学 神经遗传学
  • 阿尔茨海默氏症疾病研究研究
  • 血管神经学 血管神经学

背景情况:

  • 大脑白质高强度 (WMH) 在阿尔茨海默病 (AD) 中很常见,并且与粉样蛋白水平有关.
  • 连接WMH和AD粉样蛋白病理的分子机制尚未完全理解.

研究的目的:

  • 为了确定单核酸多态 (SNPs),修改WMH和AD粉样蛋白生物标记物之间的关联.
  • 为了阐明AD中WMH-粉样蛋白关系的遗传基础.

主要方法:

  • 在ADNI参与者中进行全基因组相互作用研究,评估SNP-WMH在CSF Aβ42.2.上的相互作用.
  • 在英国生物库中的复制和在ROSMAP中对粉样蛋白病理学SNP-WMH相互作用的调查.
  • 用于WMH的自动化MRI细分和用于Aβ42定量化的免疫测试/LC-MS.

主要成果:

  • 18号染色体上的一个新的28变体位点,顶部SNP rs72899960,与WMH显著相互作用,预测CSF Aβ42.
  • 这种SNP-WMH相互作用在英国生物库中复制,并与ROSMAP中的扩散斑块负担相关.
  • rs72899960的小等位基因表现出一种保护作用,与较高的Aβ42和较低的斑块负担相关,在WMH较大的个体中.

结论:

  • 基因组变异,特别是涉及snRNA,调节了AD中WMH和粉样蛋白生物标志物之间的关系.
  • 这突显了snRNA途径在血管疾病和AD病理学之间的相互作用中的潜在调节作用.
  • 研究结果表明,通过专注于snRNA和相关途径,对阿尔茨海默病提出了新的治疗点.