臨床所見
Sulakshna Aggarwal1, Priya Chatterjee2, Hitesh Pradhan2
1Centre for Brain Research, Bangalore, Karnataka, India.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 25, 2025
まとめ
ビタミンB12の状態に関わらず、農村部の成人ではホモシステイン高値は認知機能の低下および脳容量の縮小と関連しています。早期のホモシステインスクリーニングは、認知機能低下のリスクのある個人を特定するのに役立つ可能性があります。
科学分野:
- 神経学
- 栄養神経科学
- 老年学
背景:
- ビタミンB12は、潜在的にホモシステインレベルを介して認知機能に影響を与えます。
- 農村インドにおけるビタミンB12、ホモシステイン、および認知/脳の健康に関するデータは限られています。
研究 の 目的:
- 農村部のインドの高齢者集団における血清ビタミンB12、ホモシステイン、MRI脳容量、および認知パフォーマンスとの関連を評価すること。
- ビタミンB12と認知/脳アウトカムとの間のホモシステインの潜在的な媒介効果を調査すること。
主な方法:
- CBR-SANSCOGコホートの2784人の非認知症参加者(45歳以上)の横断的分析。
- HMSEおよびCOGNITOバッテリーを使用した認知評価;サブセット(n=1268)でのMRI脳容量測定。
- 複数の共変量を調整した一般線形モデルを使用した統計分析。
主要な成果:
- ビタミンB12レベルと認知パフォーマンスまたは脳容量との間に関連は見られませんでした。
- ホモシステインレベルの上昇は、HMSEおよび視覚的注意スコアの低下、および海馬体積の減少と相関していました。
- ホモシステインは、ビタミンB12と認知/脳アウトカムとの関係を媒介しませんでした。
結論:
- 血清ホモシステインの増加は、ビタミンB12レベルとは独立して、この集団における認知パフォーマンスと負の相関があります。
- ホモシステインの早期スクリーニングは、認知機能障害のリスクのある個人を特定する可能性があります。
- ホモシステインは、早期認知機能障害検出のための多因子バイオマーカーの構成要素である可能性があります。
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