新しいNADの合成により,ミトコンドリアの機能が向上し,健康が改善される
Elena Katsyuba1, Adrienne Mottis1, Marika Zietak2,3
1Laboratory of Integrative and Systems Physiology, Interfaculty Institute of Bioengineering, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.
Nature
|October 26, 2018
まとめ
ACMSD酵素を阻害すると,細胞内のNAD+レベルが上昇し,ミトコンドリアの機能が向上し,腎臓と肝臓を潜在的に保護します. この発見は 代謝や老化関連の病気の 治療の新たな道を開きます
科学分野:
- 生物化学
- 代謝経路
- ミトコンドリア生物学
背景:
- ニコチナミドアデニンジヌクレオチド (NAD+) は細胞のエネルギーと長寿に不可欠です.
- サーチューインはNAD+に依存する酵素で,代謝と寿命の改善に関連しています.
- 新しいNAD+合成経路の調節は細胞の健康の鍵です.
研究 の 目的:
- NAD+の調節におけるα-アミノ-β-カルボキシムコネート-ε-セミアルデヒドデカルボキシラーゼ (ACMSD) の役割を調査する.
- NAD+レベルとシルトゥインの活性を増強する戦略としてACMSD抑制を調査する.
- 組織保護のためのACMSD阻害剤の治療の可能性を評価する.
主な方法:
- Caenorhabditis elegansとマウスモデルにおける 遺伝子操作
- ACMSDの薬理学的抑制
- 細胞内のNAD+レベルとシルトゥイン1の活性の測定
- ミトコンドリア機能の評価
主要な成果:
- ACMSDは,保存されたメカニズムを通じて,細胞のNAD+レベルの主なレギュレータとして特定されました.
- ACMSDの抑制により,NAD+合成とシルトゥイン1の活性が増加した.
- ACMSDの抑制により,ミトコンドリア機能の強化が観察されました.
- 2つの強力で選択的なACMSD阻害剤が特徴付けられました.
結論:
- ACMSDは細胞のNAD+レベル,シルトゥイン活性,ミトコンドリアのホメオスタシスの重要な調節剤である.
- ACMSDの抑制は,NAD+代謝を強化するための有望な治療戦略です.
- ACMSD阻害剤は,ACMSDの発現が制限されているため,腎臓と肝臓の組織に保護効果をもたらす可能性があります.
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