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神经精神症状 (NPS) 与在认知上没有受损的个体中与阿尔茨海默病 (AD) 病理学有关. 与预期相反,这些关联在男性中更强,而不是女性,对于白质超强度体积.

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科学领域:

  • 神经学 神经学
  • 神经成像是一种神经成像.
  • 精神病学是一个精神病学.

背景情况:

  • 神经精神症状 (NPS) 在阿尔茨海默病 (AD) 中很常见,可能表明疾病的早期阶段.
  • 以前的研究将NPS与粉样β (Aβ) 和病理的增加联系起来,特别是在像杏仁体这样的脆弱大脑区域.
  • 白质高强度 (WMH) 体积和性别差异也与阿尔茨海默病的进展和NPS严重程度有关.

研究的目的:

  • 为了研究NPS和AD的关键生物标志物之间的关联:Aβ负担,杏仁核沉积和额头白质过强度 (WMH) 量.
  • 探索这些关联中潜在的基于性别的差异,假设由于报告的NPS患病率更高,女性的联系更强.

主要方法:

  • 利用PET成像 (粉样和) 和MRI (WMH体积) 对来自PREVENT-AD队列的208名认知不受损的参与者.
  • 采用线性回归模型,将性别作为交互术语来分析NPS (冷漠,焦虑,抑郁,压力,坚持性思维,神经性) 和生物标志物之间的关系.
  • 在所有分析中对年龄,教育,APOE4状态和心血管风险因素进行控制.

主要成果:

  • 发现NPS和AD标志物之间存在显著的关联,特别是WMH体积,在男性中比女性更明显.
  • 在男性中观察到压力和抑郁症与粉样蛋白和杏仁核之间的关联.
  • 确定了女性的坚持性思维和杏仁核之间的关联.

结论:

  • 在高风险,认知不受损的个体中,NPS和AD生物标志物 (MRI和PET) 之间的证实关联.
  • 反驳了最初的假设,揭示了某些标记物在男性中更强烈的关联,尽管女性的NPS患病率更高.
  • 突出了NPS,性别和AD病理之间的复杂相互作用,需要进一步研究性别特异性机制.