中年早期的卵巢切除与下部后部海马体功能有关
Alana Brown1, Laura Gravelsins1, Nicole J Gervais1,2
1Department of Psychology, University of Toronto, Toronto, Ontario, Canada.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 28, 2024
概括
由于卵巢切除 (双侧沙卵巢切除术) 的早期更年期可能会通过在记忆编码期间改变后部海马活动来增加阿尔茨海默病的风险. 雌激素治疗可能有助于减轻这些大脑功能变化.
科学领域:
- 神经科学是一个神经科学.
- 内分泌学 在内分泌学.
- 老年学是指老年学的学科.
背景情况:
- 与那些经历过自发更年期 (SM) 的女性相比,接受早期双边卵切除术 (BSO) 的女性面临患阿尔茨海默病 (AD) 的风险更高.
- 关联BSO与AD风险增加的潜在机制,特别是有关早期认知变化 (如关联性记忆缺陷) 的机制,仍未得到充分研究.
研究的目的:
- 研究BSO在关联记忆任务期间对大脑活动的影响.
- 为了比较患有BSO的女性 (有或没有雌激素治疗) 和具有完整卵巢的年龄匹配对照的女性之间的海马激活模式.
主要方法:
- 功能磁共振成像 (fMRI) 用于评估在面部名称关联记忆任务期间的大脑活动.
- 参与者包括早期中年妇女BSO (n=28),BSO与雌激素治疗 (ET) (n=35) 和年龄匹配对照 (AMCs) (n=40).
- 在关联编码和检索过程中,沿前后轴的海马活动进行了比较.
主要成果:
- 与AMC组相比,两个BSO组在记忆编码过程中表现出较低的后部海马激活.
- 在BSO组中,这种下降的海马激活与他们在关联记忆任务上的表现没有显著的相关性.
结论:
- 在BSO后17β-雌激醇的早期损失可能会在关联记忆编码过程中对后部海马活动产生负面影响.
- 这些海马功能变化可能是痴呆风险增加的早期指标,可能会影响晚年AD.
- 雌激素治疗可以通过改善与中年卵巢切除相关的功能性大脑变化提供保护作用.
关键词:
雌二醇是雌二醇的一种药物.功能性磁共振成像技术 功能性磁共振成像技术在海马体内,海马体激素疗法激素疗法是一种激素疗法.更年期 绝经 绝经卵巢切除术 (Oophorectomy) 是一种切除卵巢的方法.更多相关视频
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