依赖IGF2BP3的谷氨胺/BCAA代谢重新连接,使老年人体脂肪衍生的干细胞恢复青春,以增强组织再生
Zichao Li1,2,3, Lin Feng4,5, Xinxin Wei5,6
1Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China.
Cell discovery
|January 20, 2026
概括
衰老会降低干细胞的功能,但通过IGF2BP3-m6A轴恢复分支链氨基酸和谷氨胺代谢,使老年干细胞复原以修复组织.
科学领域:
- 再生医学是一种再生医学.
- 干细胞生物学 干细胞生物学
- 表观遗传学和新陈代谢
背景情况:
- 衰老显著损害了人类脂肪衍生干细胞 (hASCs) 的再生和分化能力.
- 导致hASCs与年龄相关的功能衰退的确切机制尚未完全理解.
- 了解这些机制对于开发增强老化干细胞功能的策略至关重要.
研究的目的:
- 阐明与年龄相关的hASCs功能衰退背后的分子机制.
- 确定参与hASC衰老和衰老的关键调节者和途径.
- 探索潜在的治疗干预措施,以使老年hASCs恢复青春.
主要方法:
- 系统功能测定和体内实验以评估hASC属性.
- 多基因组学分析 (基因组学,转录组学,蛋白质组学,代谢组学) 以确定分子差异.
- 确定分子标和途径的功能验证.
- 涉及基因操纵和营养补充的救援实验.
主要成果:
- 鉴定了一种代谢活跃的ACTA2+TAGLN+亚群,富含婴儿hASC,具有高分支链氨基酸 (BCAA) 和谷氨酸代谢.
- 发现RNA结合蛋白IGF2BP3通过通过METTL3-介导的m6A修饰稳定BCAT1和GLSmRNA来维持hASC干.
- 证明IGF2BP3-m6A-BCAT1/GLS轴与年龄相关的衰减驱动了老年hASC (E-hASC) 的代谢重编程,衰老和功能崩.
- 表明恢复BCAT1/GLS或补充BCAA/谷氨酸可以使E-hASCs复苏,改善增殖,分化和伤口愈合.
结论:
- IGF2BP3是hASC衰老的中心调节者,将m6A表体转录学修饰与代谢重编程联系起来.
- 在IGF2BP3-m6A-BCAT1/GLS轴代表一个可用药物的目标,使老年hASCs.
- 营养补充和m6A调节被提议作为临床可行的策略,以优化老年人hASCs的组织再生.
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