临床表现 临床表现
Chandra A Reynolds1, Nathan A Gillespie2, Michael C Neale2
1University of Colorado Boulder, Boulder, CO, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 25, 2025
概括
在晚年生活中,记忆力MCI的遗传性接近阿尔茨海默病的水平. 在这项双胞胎研究中,阿尔茨海默氏症和教育的遗传风险得分并不能显著预测MCI发展.
科学领域:
- 老年学是指老年学的学科.
- 遗传学 遗传学 是一个
- 神经科学是一个神经科学.
背景情况:
- 轻度认知障碍 (MCI) 是阿尔茨海默病 (AD) 的前体,遗传概率估计有所不同.
- 随着长时间的随访和随着时间的推移考虑诊断稳定性,MCI的遗传性可能会增加.
- 通过多基因分数 (PGS) 调查AD和教育的遗传贡献至关重要.
研究的目的:
- 在纵向双胞胎队列中确定晚年MCI的遗传性.
- 评估阿尔茨海默病和教育成绩多基因分数对MCI风险的影响.
- 检查诊断稳定性对MCI遗传性估计的影响.
主要方法:
- 对1593名男性双胞胎 (越南时代双胞胎衰老研究) 的纵向分析,年龄为52.1至78.5.5.
- 基于Jak/Bondi标准的MCI诊断,根据早期认知能力进行调整;不稳定的诊断被排除在外.
- 生物识别分析模拟遗传性,控制年龄;AD和教育的PGS被纳入.
主要成果:
- 无记忆性MCI (aMCI) 的遗传率估计为57.9% (当不包括不稳定的诊断时增加到61.1%)
- 一般MCI遗传率为42.1% (增加至46.9%),而非amnestic MCI遗传率无法估计.
- 对阿尔茨海默病和教育的多基因评分显示,与一般或aMCI风险的相关性很小 (<1%).
结论:
- 在晚年生活中,记忆力MCI的遗传性与AD估计值可比,突出显著的遗传影响.
- 目前阿尔茨海默病和教育的多基因评分没有充分捕捉到MCI的遗传风险.
- 需要进一步的研究来确定有助于MCI发展的特定遗传因素.
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