臨床症状
Caitlin S Latimer1, Rod L Walker2, Marika Bogdani1
1University of Washington, Seattle, WA, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 26, 2025
まとめ
アルツハイマー病(AD)の認知症は、認知サブグループ間で神経病理が多様であることを示している。記憶障害および言語障害AD認知症サブグループはLATEおよび海馬硬化症の頻度が高く、視空間認知障害サブグループはThal段階が低かった。
科学分野:
- 神経病理学; 神経科学; 老年医学
背景:
- アルツハイマー病(AD)の認知症は、異質な状態として認識されている。診断時の認知テストの成績に基づいてAD認知症をサブグループ化することで、異なる根本的な病理が明らかになる可能性がある。
研究 の 目的:
- アルツハイマー病の認知症の異なるサブグループ間での神経病理学的所見を比較すること。診断時の認知プロファイルが特定の神経病理学的マーカーと相関するかどうかを調査すること。
主な方法:
- Adult Changes in Thought(ACT)前向きコホート研究のデータを利用した。確率的または可能性のあるAD認知症の参加者を、認知成績(記憶、実行機能、言語、視空間)に基づいてサブグループに分類した。アルツハイマー型病理、LATE、レビー小体、海馬硬化症を含む死後神経病理データについて、順序ロジスティック回帰を用いて分析した。
主要な成果:
- AD認知症の358例を対象に、AD-Memory、AD-Language、AD-Visuospatial、AD-Executiveなどのサブグループに分類して検討した。サブグループ間で神経病理の明確なパターンが認められ、Thal段階はAD-Memoryで最も高く、AD-Visuospatialで最も低かった。AD-LanguageおよびAD-Memoryサブグループでは、AD-Visuospatialサブグループと比較して、LATE段階および海馬硬化症の頻度が高かった。
結論:
- 神経病理学的パターンは、認知的に定義されたアルツハイマー病の認知症のサブグループ間で著しく異なる。これらの所見は、神経病理学的レベルでのAD認知症の異質性を支持する。これらのサブグループ間での自然史およびその他の特徴の違いをさらに探求するための研究が必要である。
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