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Updated: Feb 24, 2026

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A Rat Model of EcoHIV Brain Infection
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併存するHIVとコカイン使用は脳の老化を加速させる
bioRxiv : the preprint server for biology
|February 23, 2026
まとめ
併存するHIVとコカインの使用は脳の老化を加速させ、認知障害のリスクを高めます。この脳年齢の差は、特定のネットワークの変化と潜在的な介入ターゲットを強調しています。
科学分野:
- 神経科学
- 神経画像
- 老化研究
背景:
- ヒト免疫不全ウイルス(HIV)感染とコカイン使用(CU)は、独立して認知障害および脳異常と関連しています。
- HIVとCUの併用が脳の老化と認知機能に及ぼす複合的な影響は、完全には理解されていません。
研究 の 目的:
- 併存するHIVとCUと脳の老化の加速との関係を調査すること。
- 脳年齢差(BAG)が、HIVおよび/またはCUを持つ個人における神経認知障害(NCI)とどのように関連するかを調べること。
- 併存するHIVとCUに関連する特定の脳構造の変化を特定すること。
主な方法:
- ヒトコネクトームプロジェクト・エイジング(HCP-A)データを用いて、形態計測ベースの脳年齢モデルをガウス過程回帰で訓練しました。
- モデルを、HIV/CU負担が異なる独立したコホート(HIV-/CU-、単一障害、HIV+/CU+)に適用しました。
- 併存疾患の負担とNCIに関連する脳年齢差(BAG)を、共変量を制御して分析しました。ネットワークレベルの分析にはSHapley Additive exPlanation(SHAP)を使用しました。
主要な成果:
- 併存疾患の負担が脳年齢差(BAG)に用量依存的な影響を与えることが観察され、HIV+/CU+群が最大のBAGを示しました。
- BAGの増加は、神経認知障害(NCI)の可能性が高いことと有意に関連していました。
- BAGは、併存疾患の負担とNCIとの関連を部分的に媒介し、二重障害群でより強い効果を示しました。
結論:
- 併存するHIVとCUは、構造的な脳の老化の加速と関連しています。
- 脳年齢差は、併存するHIV/CUを認知障害に結びつける脳の変化のバイオマーカーとして機能する可能性があります。
- BAGへのネットワーク固有の寄与を特定することは、併存するHIVとCUを持つ個人に向けた標的介入に役立つ可能性があります。
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