基础科学和病原发生学
Holly C Hunsberger1,2, Kameron Kaplan1, Lainey B Toennies1
1Rosalind Franklin University, North Chicago, IL, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 23, 2025
概括
焦虑会加剧阿尔茨海默病 (AD) 在女性中的进展,影响海马体通路. 类药物可能会恶化记忆力,而更年期引起的焦虑表明潜在的脑补偿.
科学领域:
- 神经科学是一个神经科学.
- 老年学是一门学科.
- 药理学 药理学是指药理学的学科.
背景情况:
- 在雌性阿尔茨海默病 (APP/PS1) 小鼠的初步研究表明,早期的焦虑和认知衰退与不平衡的大脑网络有关.
- 对阿尔茨海默病神经成像倡议 (ADNI) 数据集的人类分析证实了女性阿尔茨海默病患者的焦虑程度更高,粉样蛋白沉积女性的痴呆过渡速度更快,焦虑女性的大脑体积更小,焦虑是痴呆过渡的关键预测因素.
研究的目的:
- 研究抗焦虑药物治疗对老鼠阿尔茨海默病 (AD) 病理学的影响.
- 为了剖析焦虑背后的神经回路.
- 为了确定更年期是否加速AD病理.
主要方法:
- 在控制和AD小鼠中,在恐惧记忆任务之前服用阿尔普拉佐拉姆 (Xanax),以测量海马神经元激活.
- 将霍乱毒素B注入杏仁体和横向下丘脑,以映射到控制和AD小鼠的腹部海马体的投影.
- 使用VCD诱导更年期以评估类似焦虑的行为和记忆功能.
主要成果:
- 阿尔普拉佐拉姆治疗降低了雄性和雌性小鼠的记忆保留,可能是由于腹部海马检索细胞激活的减少.
- 绝经前的小鼠早些时候表现出类似焦虑的行为和认知衰退,而绝经后的反弹表明了补偿机制.
- 与对照和雄性相比,在雌性AD小鼠中预测腹部海马体的投射增加.
结论:
- 神经精神症状通过特定性别的海马路径影响认知衰退.
- 对于阿尔茨海默病患者来说,二zepines可能没有益处.
- 更年期可以触发焦虑表型,但大脑可能拥有对荷尔蒙变化的补偿机制.
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