机械拉伸诱导的ATP从骨细胞释放促进骨髓中介质干细胞的骨质生成
Yiwen Ru1,2,3, Hong Gu1,2,3, Lian Sun1,2,3
1Department of Orthodontics, The Affiliated Stomatological Hospital of Nanjing Medical University, 210029 Nanjing, Jiangsu, China.
Discovery medicine
|March 26, 2024
概括
机械拉伸激活骨细胞中的Piezo1,触发流入和ATP释放. 这一过程增强了骨髓介质干细胞 (BM-MSC) 骨质生成,为骨再生疗法提供了新的途径.
科学领域:
- 生物医学工程 生物医学工程
- 细胞生物学 细胞生物学
- 再生医学是一种再生医学.
背景情况:
- 部分心骨质生成 (MDO) 对于面骨的再生至关重要.
- 骨细胞是关键的机械传感器,通过向干细胞发送信号来调解骨重塑.
- 皮埃佐1通道与骨细胞机械传导和信号传递有关.
研究的目的:
- 在MDO中阐明骨细胞机械感知的分子机制.
- 为了识别参与伸展诱导骨形成的信号分子.
- 了解Piezo1在骨细胞介导干细胞分化中的作用.
主要方法:
- 机械拉伸骨细胞样MLO-Y4细胞,有或没有Piezo1敲击.
- 通过ALP和阿利沙林红S染色来评估骨髓介质干细胞 (BM-MSC) 的骨质生成潜力.
- 从骨细胞中测量腺三酸盐 (ATP) 的释放.
- 分析基因和蛋白质表达 (RT-PCR,西部斑,免疫光) 和线粒体形态学 (TEM).
主要成果:
- 从伸展的骨细胞中得到的条件介质显著增强了BM-MSC骨质生成.
- 骨质生成与骨细胞释放的ATP有关.
- 通过Piezo1调解的拉伸诱导的流入,TAZ核转位和ATP产生.
- 这些事件促进了线粒体裂变和ATP释放.
结论:
- 通过机械拉伸激活Piezo1,在骨细胞中启动信号级联,涉及流入,TAZ转位和线粒体变化.
- 这种级联的高潮是ATP释放,增强BM-MSC骨质生成能力.
- 位子1依赖的线粒体能量代谢和ATP释放代表了骨重塑和再生的新型治疗点.
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