HDAC3はNrf2- GDF11信号を抑制し,関節関節炎におけるコンドロサイトアディポゲネシスを誘導する
Yuqian Shi1, Zhihua Xu1, Fuyin Li1
1State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi International Joint Research Center for Oral Diseases, Department of Oral Anatomy and Physiology and TMD, School of Stomatology, The Fourth Military Medical University, Xi'an 710032, China.
Journal of advanced research
|September 6, 2025
まとめ
関節関節炎 (TMJ OA) の異常な生体力により,HDAC3が上昇し,Nrf2とGDF11が抑制される. これはコンドロサイトアディポゲネシスを促進し,TMJ OAを悪化させますが,HDAC3阻害剤またはNrf2アゴニストで治療することができます.
科学分野:
- 生物化学
- 分子生物学
- 骨関節炎 研究
背景:
- 関節関節炎 (TMJ OA) のとき,異常な生体力によってコンドロサイトアディポゲネシスが起こります.
- 成長分化因子11 (GDF11) が関与しているが,TMJ OAにおける機械感受性ヒストン脱酸化酵素3 (HDAC3) によってその調節は不明である.
研究 の 目的:
- TMJ OAにおけるコンドロサイトアディポゲネシスにおけるGDF11の調節におけるHDAC3の役割を調査する.
- TMJ OAの病原性における生体力学的ストレス,HDAC3,Nrf2,GDF11を結びつける分子メカニズムを解明する.
主な方法:
- 単面前部クロスバイト (UAC) のラットモデルと周期的な牽引力 (CTS) 刺激されたATDC5細胞を確立し,異常な生体力学的な力をシミュレートしました.
- 軟骨変性,コンドロサイトアディポゲネシスマーカー,HDAC3,Nrf2,GDF11の発現を評価した.
- GDF11プロモーターへのNrf2結合を確認するために,二重ルシフェラーゼレポーターアッセイを使用した.
- HDAC3阻害剤RGFP966とNrf2アゴニストのBardoxoloneの治療効果を調査した.
主要な成果:
- UAC誘発のTMJ OAモデルでは,軟骨の薄れ,OARSIスコアの増加,軟骨マトリックスマーカーの減少,および軟骨細胞増殖マーカーの増加が示されました.
- 過剰な生体力作用は,脂質滴の蓄積とアディポネクチンの上昇によって証明された,コンドロサイトアディポゲネシスを加速した.
- Nrf2はGDF11のプロモーターに直接結合する.
- RGFP966とBardoxoloneの治療はGDF11の発現を回復し,アディポゲネシスを弱め,軟骨の退化を緩和しました.
結論:
- 異常な生体力によりHDAC3が上昇し,Nrf2媒介のGDF11のトランザクティベーションが阻害される.
- この経路は軟骨細胞の脂肪形成を促進し,TMJ OAの進行を悪化させる.
- HDAC3やNrf2を標的とした治療は,TMJ OAの潜在的な治療戦略です.
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