CD36は慢性統合ストレス応答を介して筋分化を調節する-筋老化への影響
Xin Ye1,2, He-Qiang Jia1, Chen Yuan1
1Department of Pathology, College of Basic Medicine, Beihua University, Jilin, 132013, Jilin, P.R. China.
Journal of muscle research and cell motility
|January 22, 2026
まとめ
CD36(クラスター化分化36)は、統合ストレス応答(ISR)およびミトコンドリア性タンパク質不折症応答(UPRmt)と相互作用することにより、筋細胞分化に影響を与え、サルコペニアの潜在的な治療法を提供する。
科学分野:
- 筋生物学
- 細胞ストレス応答
- ミトコンドリアダイナミクス
背景:
- 統合ストレス応答(ISR)およびミトコンドリア性タンパク質不折症応答(UPRmt)は、筋衛星細胞分化に不可欠である。
- 老化筋は、分化障害、CD36発現の増加、およびCD36のミトコンドリア局在を示す。
- 分化中のCD36とISR/UPRmtの相互作用は、依然として十分に理解されていない。
主な方法:
- 分化3日目のC2C12筋芽細胞におけるCD36ノックダウン。
- ISR関連タンパク質(例:ATF4)およびUPRmt関連タンパク質(例:ATF5、HSP60、HSP10)の分析。
- 筋分化マーカー(ミオゲニン、Myh1)、ミト核タンパク質バランス、およびミトコンドリア機能の評価。
- 老化筋におけるCD36とmTORの相互作用の調査。
結論:
- CD36は老化筋においてミトコンドリアに局在し、C2C12細胞における初期筋分化中のISRおよびUPRmtに影響を与える。
- CD36モジュレーションは、ストレス応答経路および筋分化マーカーの主要タンパク質に影響を与える。
- CD36ノックダウン後には、ミトコンドリア機能不全およびミト核バランスの不均衡が生じる。
- ストレス応答におけるmTORとの相互作用およびCD36の役割は、サルコペニアに対する潜在的な治療的意義を示唆している。
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