老化白质微观结构及其修饰物的内在变化:对纵向扩散张力成像研究的元分析和系统审查
Andrea Mendez Colmenares1, Ben Prytherch2, Michael L Thomas3
1Department of Human Development and Family Studies/Molecular, Cellular and Integrative Neurosciences, Colorado State University, Fort Collins, CO, United States.
Imaging neuroscience (Cambridge, Mass.)
|August 13, 2025
概括
健康的成年人白质表现出与年龄相关的微观结构下降,特别是分数异构 (FA). 生活方式因素和健康状况可以影响这些变化,这表明针对认知衰退的干预措施的潜力.
科学领域:
- 神经成像是一种神经成像.
- 神经科学是一个神经科学.
- 老年学是一门学科.
背景情况:
- 白质 (WM) 微观结构在整个成年期经历自然变化.
- 了解这些变化对于识别影响认知健康和衰老的因素至关重要.
研究的目的:
- 系统地审查和元分析纵向扩散张力成像 (DTI) 研究.
- 量化成人WM微观结构的内部变化,并确定相关的修饰剂.
主要方法:
- 30个纵向DTI研究的元分析和系统审查.
- 在健康成年人中,随着时间的推移,白质分数异构 (FA) 的变化分析.
- 调查影响WM变化的人口,生活方式和健康相关因素.
主要成果:
- 在整个白质,基因和脏中观察到FA在人体内显著下降.
- 年龄较大,随访时间较长和女性性别与更大的FA下降有关.
- 身体活动和社会参与可能会减缓FA变化,而血管风险因素和酒精消费可能会加速它们.
结论:
- 白质微观结构随着年龄的增长而自然变化,个体差异受到各种因素的影响.
- 脑筋疲劳是旨在缓解认知衰退的干预措施的潜在治疗目标.
- 了解WM变化可能有助于在临床前诊断痴呆症,使得早期治疗.
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