维生素D,认知和阿尔茨海默病:观察性和双样本孟德尔随机化研究
Yann Ilboudo1,2, Satoshi Yoshiji1,2,3,4,5, Tianyuan Lu1,6,7
1Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, QC, Canada.
Journal of Alzheimer's disease : JAD
|May 31, 2024
概括
这项研究调查了维生素D水平是否能保护认知. 门德尔随机分析没有明确证据表明,较高的维生素D (25(OH) D保护了欧洲祖先个体的认知表现.
科学领域:
- 营养神经科学 营养神经科学
- 遗传流行病学遗传流行病学
- 阿尔茨海默氏症疾病研究研究
背景情况:
- 观察性研究表明,补充维生素D可以改善认知能力.
- 门德尔随机化 (MR) 研究表明,较高的25-氧维生素D (25(OH) D) 可能可以预防阿尔茨海默病.
- 一个潜在的机制是25(OH) D可以改善认知.
研究的目的:
- 为了研究25(OH) D可以防止认知能力下降的假设.
- 为了检查25...OH) D水平和使用MR的认知测量之间的关系.
主要方法:
- 为了减轻混,进行了双样本的孟德尔随机化 (MR) 分析.
- 基因仪器变量来源于三个大型出版物.
- 评估了基因预测的25(OH) D与七个认知指标之间的关联.
主要成果:
- 观察数据表明,25(OH) D和认知指标之间存在保护性关联 (例如,BetaPACC得分=0.06,p=1.8×10-10).
- 核磁共振分析显示,基因预测的25(OH) D对整体人口的认知指标没有显著影响 (BetaPACC得分 = -0.01,p = 0.53).
- 在60岁以上的个体中没有发现显著的关联 (BetaPACC得分 = 0.03,p = 0.35).
结论:
- 在MR研究中,没有明确的证据支持增加25~OH) D对欧洲祖先个体认知表现的保护作用.
- 在60岁以上的个人中,25...OH) D对PACC分数的潜在有益影响不能完全被驳回.
- 可能需要进一步的研究来澄清维生素D在不同年龄组的认知健康中的作用.
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