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旧的线粒体通过干细胞中的α-甲酸代谢来调节的更新
Simon Andersson1,2, Hien Bui1,2, Arto Viitanen1,2
1Faculty of Biological and Environmental Sciences, University of Helsinki, Helsinki, Finland.
Nature metabolism
|July 14, 2025
概括
线粒体年龄会影响肠道干细胞的命运. 肠干细胞 (ISC) 中的旧线粒体促进帕内斯细胞的形成,有助于组织修复和再生.
科学领域:
- 细胞和分子生物学 细胞和分子生物学
- 干细胞生物学 干细胞生物学
- 代谢调节 代谢调节 代谢调节
背景情况:
- 细胞代谢关键调节细胞的命运.
- 新合成的和旧的有机细胞之间存在代谢异质性.
- 肠干细胞 (ISC) 产生代谢上不同的后代,包括帕内斯细胞 (PC).
研究的目的:
- 调查器官年龄,特别是线粒体在ISC命运和利基形成中的作用.
- 为了确定是否代谢上不同的ISC亚种群可以重建它们的利基.
- 探索针对线粒体新陈代谢进行组织修复的治疗潜力.
主要方法:
- 在小鼠ISC中分析不对称的细胞分裂.
- 在ISC亚种群中的线粒体含量和代谢活性的表征.
- 有机体形成测试以评估独立于利基的生长.
- 使用α-谷氨酸补充剂进行体内研究,以评估其对PC周转率和组织恢复的影响.
主要成果:
- 不对称的ISC分裂产生了一个富含旧线粒体的子集 (ISCmito-O).
- ISCmito-O在代谢上是不同的,产生更多的α-甲酸盐,这推动了促进PC形成的表观遗传变化.
- ISCmito-O可以通过重建PC位,独立于位形成有机体.
- 在体内α-谷氨酸补充剂增强了PC周转率和利基更新,改善了老年小鼠化学疗法损伤的恢复.
结论:
- 具有老线粒体的ISC亚群在代谢上调节细胞命运,特别是促进PC形成.
- 老化的细胞类型的代谢重编程是促进组织修复和再生的可行策略.
- 准线粒体代谢为与年龄相关的组织损伤和再生医学提供了一种新的治疗方法.
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