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オートファギーは,老化を防ぐことによって,茎の長さを維持する
Laura García-Prat1, Marta Martínez-Vicente2, Eusebio Perdiguero1
1Cell Biology Group, Department of Experimental and Health Sciences, Pompeu Fabra University (UPF), CIBER on Neurodegenerative diseases (CIBERNED), E-08003 Barcelona, Spain.
Nature
|January 8, 2016
まとめ
基礎的オートファギーは 筋肉幹細胞の静止状態と 老化中の再生機能を維持するために不可欠です オートファギーの回復は 年齢に起因する幹細胞の衰えを逆転させ 筋肉の修復を改善します
科学分野:
- 筋肉幹細胞生物学
- 細胞の老化
- オートファジーと老化
背景:
- 筋肉幹細胞の再生機能は 年齢とともに低下し 衰えていきます
- 幹細胞の静止状態を維持し,老化を防ぐメカニズムは不明です.
- 細胞の分解プロセスであるオートファギーは 年齢とともに衰えることが知られています
研究 の 目的:
- 筋肉幹細胞の静止状態を維持する基礎的自の役割を調査する.
- オートファギーの不全が年齢に関係する幹細胞の老化に寄与するかどうかを判断する.
- 筋肉の再生のための 自動食性の回復の可能性を探るため
主な方法:
- オートファギー欠乏症の老いたマウスと遺伝子組み換えの若いマウスを研究した.
- 幹細胞機能,老化マーカー,プロテオスタシス,ミトコンドリア機能,酸化ストレスについて評価した.
- 老いた衛星細胞における自己消化の再確立の効果を研究した.
主要な成果:
- 筋肉の幹細胞の静止状態を維持するために基本的オートファギーは不可欠です.
- オートファジー不全は,プロテオスタシスの喪失,ミトコンドリア機能障害,酸化ストレスによって老化を誘発する.
- オートファギーの回復は老化を逆転させ,老いた衛星細胞の再生能力を回復します.
- 人間の老年サテライト細胞では,オートファギーの減少が観察されています.
結論:
- オートファギーは 筋肉幹細胞の運命と機能の 重要な調節因子です
- 年齢に伴う筋肉衰弱とサルコペニアの治療策として,オートファギーをターゲットにしています.
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