来自MSCs的HGF通过调节mitoSTAT3控制的铜流和呼吸来缓解AKI后的衰老
Kaiting Zhuang1, Wenjuan Wang1, Cheng Xu1
1Department of Nephrology, First Medical Center of Chinese PLA General Hospital, National Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Beijing Key Laboratory of Kidney Diseases Research, Beijing, 100853, China.
Stem cell research & therapy
|September 30, 2025
概括
人类带衍生中干细胞 (hUC-MSCs) 通过增强线粒体功能来逆转损伤衰老. 它们促进STAT3转移到线粒体,改善铜恒常性,减少细胞衰老.
科学领域:
- 再生医学是一种再生医学.
- 线粒体生物学 线粒体生物学
- 损伤研究 损伤研究
背景情况:
- 人类带衍生中干细胞 (hUC-MSCs) 显示出通过维护线粒体平衡来逆转急性损伤 (AKI) 后衰老的潜力.
- 铜积累和STAT3核转位与衰老有关,但它们在MSC治疗后线粒体局部化中的作用尚未完全理解.
研究的目的:
- 阐明hUC-MSCs减轻衰老的机制,重点关注铜恒温,STAT3线粒体转位和线粒体功能之间的相互作用.
- 研究cMet/HGFR信号传导在调解这些效应中的作用.
主要方法:
- 患有单边缺血再输损伤 (uIRI) 的小鼠用hUC-MSCs进行治疗.
- 用RNA测序,共免疫沉降,分子对接和分子动力学模拟来分析衰老,STAT3线粒体转移 (mitoSTAT3) 和铜恒温.
- 使用cMet/HGFR,mitoSTAT3和COX17的抑制来验证分子相互作用.
主要成果:
- hUC-MSCs治疗改善了功能,减少了衰老标志物,同时在Ser727 (STAT3pSer727) 和COX17水平上增加了STAT3酸化.
- RNA测序表明了衰老调节,铜平衡和线粒体呼吸链复合体IV之间的联系.
- 阻断MSC衍生的HGF或抑制cMet导致STAT3pSer727,COX17和线粒体复合体IV亚单元mt-Co1的减少,伴随着线粒体铜积累增加和管状上皮细胞 (RTEC) 的衰老恶化.
- 同免疫沉和分子对接证实了STAT3pSer727和COX17之间的直接相互作用.
结论:
- 介质干细胞衍生的HGF通过cMet受体促进STAT3线粒体转位.
- 这一过程增强了由COX17介导的线粒体呼吸和铜分泌,最终减少了AKI中的衰老.
- 针对HGF/cMet/STAT3/COX17轴为AKI诱导的衰老提供了一个潜在的治疗策略.
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