ミトコンドリア 呼吸 の 細胞外 調節 は 大動脈 閉塞 を 引き起こし ます
Jorge Oller1,2,3, Enrique Gabandé-Rodríguez1,2, María Jesús Ruiz-Rodríguez4
1Departamento de Biología Molecular, Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas Universidad Autónoma de Madrid, Spain (J.O., E.G-R., G.D-M., J.F.A., E.M.B., P.A., M.M.).
Circulation
|March 12, 2021
まとめ
ミトコンドリアの機能障害が マルファン症候群で主動脈動脈瘤を引き起こします ニコチナミドリボシドでミトコンドリアの代謝を回復することは,この遺伝的疾患に対する有望な治療戦略です.
科学分野:
- 心血管生物学
- 遺伝学
- ミトコンドリア生物学
背景:
- マルファン症候群 (MFS) は,FBN1遺伝子変異によって引き起こされる遺伝性結合組織疾患である.
- 胸前動脈動脈瘤は MFS の主要な,生命を脅かす合併症です.
- 現在,MFSにおける大動脈疾患の治療は,外科的介入に限定されています.
研究 の 目的:
- MFSにおける胸動脈動脈瘤の進行におけるミトコンドリア機能障害の役割を調査する.
- MFSに関連する大動脈瘤に対する潜在的な治療方法として,ミトコンドリアの強化戦略を探求する.
主な方法:
- MFSマウスモデルと患者のトランスクリプトミクスと代謝分析の組み合わせ
- 血管の滑らかな筋肉細胞 (VSMC) の特定のミトコンドリア機能障害を持つ条件付きマウスモデルを生成した.
- MFSマウスモデルでTfam増強剤とミトコンドリア呼吸増強剤を試験した.
主要な成果:
- ミトコンドリア機能障害とmtDNA枯渇がMFS大動脈瘤の主要な特徴として特定されました.
- VSMCのミトコンドリアの減少は,大動脈動脈瘤と早死につながることを示した.
- ニコチナミドリボシドは,ミトコンドリアの代謝を回復することによって,MFSマウスにおける大動脈動脈瘤を迅速に逆転させることが示された.
結論:
- 細胞外マトリックスに影響されるVSMCミトコンドリア機能は,MFS大動脈瘤の発達において極めて重要です.
- 血管新生をターゲットにすることで 遺伝的な大動脈動脈瘤の 治療の新たな道が開けます
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