生物标志物 生物标志物
Molly R LaPoint1, Rachel A Whitmer2, Sirena Gutierrez3
1Kaiser Permanente Northern California Division of Research, Pleasanton, CA, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 25, 2025
概括
大脑体积的性别差异随着年龄的增长而变化. 在年轻人中,女性性别与尾体积较小和心室体积较大有关,但在老年人群中,这些关联消失了.
科学领域:
- 神经成像是一种神经成像.
- 老年学是一门学科.
- 神经退行发生神经退行.
背景情况:
- 衰老和痴呆相关的神经退行症的性别差异在整个生命周期中尚未完全理解.
- 研究性如何影响大脑结构的变化随着时间的推移对于理解与年龄相关的认知衰退至关重要.
研究的目的:
- 为了检查不同年龄组大脑区域体积的性别差异.
- 为了确定性别与大脑结构之间的关联是否随年龄而变化.
主要方法:
- 利用了来自838个种族和种族多样化的老年人 (346名男性,492名女性) 的3T MRI数据.
- 分析了皮质灰质总量,海马体,心室,额头,头,头顶和叶体积.
- 使用线性回归模型和年龄分层分析 (50-74岁,75-89岁,90岁以上) 来评估性别特异性影响.
主要成果:
- 在50-74岁的成年人中,女性性别与尾体积较小和心室体积较大有关.
- 在老年人群 (75-89岁和90岁以上) 中,这些关联并不显著.
- 在90岁以上的人群中,与年轻人群相比,尾和心室体积的关联方向不同.
结论:
- 性别和大脑区域体积之间的关系取决于年龄.
- 在年轻的老年人中,女性的性别与特定的大脑体积差异 (头,心室) 有关,但在老年年龄组中并非如此.
- 需要进一步的研究来了解驱动这些性别年龄相互作用的机制及其对认知的影响.
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