双極性障害における体重増加と海馬縮の関連 - 934人の参加者を対象とした縦断的な調査
Julia Fraiha-Pegado1, Sean R McWhinney1, Martin Alda1
1Department of Psychiatry, Dalhousie University, Halifax Canada.
Biological psychiatry
|February 20, 2026
まとめ
体重増加は,特に双極性障害 (BD) と低体量指数 (BMI) の個体において,海馬縮症に寄与する. 体重管理は,海馬の神経保護効果をもたらす可能性があります.
科学分野:
- 神経科学は神経科学である.
- 精神科医は精神病を患っている.
- 放射線学 放射線学
背景:
- 肥満は双極性障害 (BD) で一般的であり,海馬体積の減少に関連しています.
- 肥満とBDにおける脳の変化の間の時間的関係は不明である.
- 脳構造に対するBMIとBDの双方向効果を調査することは極めて重要です.
研究 の 目的:
- BDと健康な対照群 (CN) の個体において,ボディマス指数 (BMI) と海馬体積 (hippocampal volume) の間の縦断的な関係を調べる.
- BMIまたは体重増加が将来の海馬体積変化を予測するかどうかを判断する.
- ベースラインの脳構造が将来の体重変化を予測するかどうかを評価する.
主な方法:
- 233人のBD参加者および701人のCNからの長距離T1加重型MRIデータを分析した.
- FreeSurferの縦流を用いて,皮質下部の量を推定した.
- 線形混合モデルでは,BMI/体重変化と海馬体積/体積変化の双方向関係を評価した.
主要な成果:
- ベースラインのBMIは将来の海馬縮を予測したが,脳構造は体重変化を予測しなかった.
- より大きな体重増加は,特にBDにおいて,海馬縮の増加と相関する.
- 低ベースラインのBMIは,将来のより大きなヒポカンパの体積損失を予測しました.
結論:
- 体重増加は,特にBMIとBDが低い個体において,海馬縮の修正可能な危険因子です.
- 体重増加を防ぐことは,BDにおける海馬の神経保護効果をもたらす可能性があります.
- 体重管理をターゲットにすることは,BDの脳構造を保存するための戦略かもしれません.
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