自閉症スペクトル障害におけるNrf2-Keap1-BACH1軸の緩和
Andrea Vallese1, Sara Melija2, Joussef Hayek3
1Dept. of Environmental and Prevention Sciences, University of Ferrara, Ferrara, Italy; Dept. of Bioscience and Agro-Food and Environmental Technology, University of Teramo, Teramo, Italy.
Redox biology
|August 26, 2025
まとめ
研究者らは,Nrf2-Keap1-BACH1経路が自閉症スペクトル障害 (ASD) 線維芽細胞で調節不能であることを発見した. この経路をヘミンで標的にすることで ミトコンドリアの機能と遺伝子発現が回復し,ASDの潜在的な治療戦略を示唆した.
科学分野:
- 神経科学
- 細胞生物学
- 生物化学
背景:
- 自閉症スペクトル障害 (ASD) は,多因子の発端を持つ複雑な神経発達状態です.
- 細胞のリドックスバランスを含むASDの基礎となる正確な分子メカニズムは完全に理解されていません.
研究 の 目的:
- 自閉症患者の皮膚線維細胞における Nrf2信号伝達経路を調査する.
- ASD細胞病理における Nrf2-Keap1-BACH1軸の役割を調査する.
主な方法:
- ASD患者からの一次性皮膚線維芽細胞の分離と培養
- Nrf2経路の成分 (Nrf2,HO1,BACH1,Keap1) を遺伝子およびタンパク質発現で分析する.
- ミトコンドリア機能 (mtROS,膜ポテンシャル) とスルフォラファン (SFN) とヘミン治療に対する反応の評価.
主要な成果:
- ASDの線維芽細胞は,HO1発現が低下し,BACH1核蓄積が増加した構成的なNrf2活性化を示した.
- ASD細胞は,上昇したKeap1レベルによるSFN刺激でNrf2核転移の障害を示した.
- ヘミンの治療は,HO1発現を正常化し,mtROSを減少させ,ASD線維細胞のミトコンドリア膜の潜在能力を回復させた.
結論:
- Nrf2-Keap1-BACH1軸の調節不全がASD線維細胞で確認されている.
- この軸の薬理学的ターゲティング,特にヘミンは,ASDにおけるリドックス不均衡の修正とミトコンドリア機能の改善の可能性を示しています.
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