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高葡萄糖会通过线粒体功能障碍诱导突介质干细胞的衰老
Shuyi Tan1, Wangxi Wu1, Yifan Chen1
1Stomatological Hospital, School of Stomatology, Southern Medical University, Guangzhou, 510280, China.
BMC oral health
|April 15, 2025
概括
高葡萄糖加快突介质干细胞 (SMSC) 衰老,导致线粒体功能障碍,包括ROS增加和线粒细胞衰老受损. 逆转高葡萄糖水平恢复了细胞功能,表明线粒体健康是SMSC衰老的关键.
科学领域:
- 细胞生物学 细胞生物学
- 干细胞生物学 干细胞生物学
- 线粒体生物学 线粒体生物学
背景情况:
- 突介质干细胞 (SMSCs) 在关节健康和组织修复中起着至关重要的作用.
- 众所周知,糖尿病特征的高葡萄糖状况会诱导细胞应激和功能障碍.
- 了解高葡萄糖如何影响SMSC对于开发相关病理的治疗方法至关重要.
研究的目的:
- 为了研究高葡萄糖对SMSC衰老的影响.
- 阐明线粒体功能障碍在高葡萄糖诱导的SMSC衰老中的作用.
- 探索葡萄糖正常化的潜力,以扭转这些影响.
主要方法:
- 在不同的时间 (24h, 48h) 中,SMSC暴露于高葡萄糖 (25 mmol/L) 或低葡萄糖 (5.5 mmol/L).
- 评估了增殖,衰老标志物 (SASP基因,SA-β-gal活性),线粒体ROS,线粒体分裂和线粒体分裂.
- 通过切换到低葡萄糖介质来研究高葡萄糖效应的可逆性.
主要成果:
- 高葡萄糖加速了SMSC衰老,由增加的SASP基因表达和SA-β-阳性细胞证明.
- 观察到线粒体ROS升高,线粒体裂变增加,并抑制了线粒体吸食 (减少PINK1,PARKIN,LC3B).
- 高葡萄糖的影响,包括抑制基因/蛋白质表达和增加氧化应激,在葡萄糖正常化后是可逆的.
结论:
- 高葡萄糖通过线粒体功能障碍诱导SMSC衰老,其特点是ROS积累,过度裂变和线粒细胞衰变抑制.
- 葡萄糖正常化有效地逆转了衰老表型,恢复了线粒细胞和减少了氧化应激.
- 线粒体功能障碍是高葡萄糖诱导的SMSC衰老的一个关键机制.
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