性差异和阿波利波蛋白E基因型对老年人白质参与的长度影响
Hui Zhang1, Jingrao Zhang1, Chun Liang Hsu1
1Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, 999077 Hong Kong, China.
Brain communications
|July 31, 2025
概括
无脂蛋白E (APOE) ɛ4基因对男性和女性大脑白质产生不同的影响. 高风险的女性表现出与记忆相关的白质活性减少,与男性不同.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 是一个遗传学.
- 认知老龄化 认知老龄化
背景情况:
- 无脂蛋白E (APOE) ɛ4等位基因是阿尔茨海默病 (AD) 的主要遗传风险因素.
- APOE4影响脂质代谢,导致AD病理,如海马缩和认知能力下降.
- 在阿尔茨海默病易受伤害的性别特异性差异,特别是在绝经后的女性中,需要进一步调查.
研究的目的:
- 探索生物性别,APOE4状态,默认模式网络 (DMN) -白质活动和记忆功能之间的关系.
- 调查老年人与或没有APOE4等位基因的DMN白质参与的性别差异.
主要方法:
- 分析了哈佛老化大脑研究的纵向数据.
- 参与者根据APOE4风险状态 (低风险与高风险) 分类.
- 绘制了DMN白质参与的地图,并使用选择性提醒测试来评估记忆.
主要成果:
- 与低风险组相比,高风险组观察到右后冠状辐射中的DMN白质活性显著减少.
- 高风险的雌性在右上纵向囊中表现出减少的DMN白质活性,与自由回忆正相关.
- 在低风险和高风险的男性中,没有发现DMN白质活性的显著变化.
结论:
- 白质参与映射有效地区分了与APOE4和生物性别相关的纵向记忆变化.
- 白质连接性的性别特异性变化可能是APOE4载体差异性认知衰退的基础.
- 这些发现强调了在AD研究中考虑遗传风险和生物性别的重要性.
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