基于70岁的认知能力正常的人群中与大脑灰质模式相关的风险和保护因素
Research square
|September 5, 2025
概括
老年人表现出与健康因素相关的不同脑灰质衰老模式. 解决心血管和社会心理风险可能有助于在晚年保持认知功能和大脑健康.
科学领域:
- 神经科学
- 老年学
- 放射学
背景情况:
- 大脑衰老涉及多种灰质损失模式,可能与痴呆症重叠.
- 在认知正常的老年人中了解这些模式对于识别不同的形状和轨迹至关重要.
研究的目的:
- 在认知不受损的老年人中确定明显的灰质 (GM) 衰老模式.
- 描述与这些转基因模式相关的临床,认知和纵向特征.
- 研究心血管和心理社会因素对大脑衰老的影响.
主要方法:
- 利用哥德堡H70研究中的746名参与者的MRI数据 (皮质厚度,皮质下体积) 进行随机森林聚类.
- 检查了与临床变量,APOE状态和脑脊液 (CSF) 的阿尔茨海默病生物标志物之间的关联.
- 使用回归模型评估了5年的认知和大脑结构轨迹.
主要成果:
- 确定了五个不同的转基因集群,主要在前端平行区域不同.
- 群体2表现出与糖尿病,酒精消费和认知表现较差,下降速度较快的扩散性转基因损失.
- 第4组显示保存的转基因与更健康的生活方式因素,高等教育和更好的认知相关;第5组与心脏病相关.
结论:
- 心血管和心理因素在衰老中显著决定了灰质 (GM) 完整性和认知功能.
- 识别和准可修改的风险因素,如糖尿病,酒精使用和心脏病, 可能是保持大脑健康的关键.
- 即使在认知上正常的个体中, 也存在着不同的大脑衰老模式, 这凸显了个性化的健康方法的重要性.
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