慢性间歇性缺氧会通过调节基因素乳化来损害BM-MSC骨质生成和长骨生长
Fang Chen1, Meizhen Gu1, Hongming Xu1
1Department of Otolaryngology-Head and Neck Surgery, Shanghai Children's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200062, China.
Journal of translational medicine
|July 29, 2025
概括
慢性间歇性缺氧 (CIH) 通过促进骨髓干细胞中的脂肪细胞分化来抑制长骨生长. 一种PPARγ抑制剂,T0070907,显示出治疗CIH诱导的骨质发育不良的潜力.
科学领域:
- 骨生物学和骨发育研究
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 代谢障碍 代谢障碍 代谢障碍
背景情况:
- 慢性间歇性缺氧 (CIH),通常是由阻塞性睡眠呼吸暂停 (OSA) 引起的,导致严重的健康并发症.
- CIH对骨生长和发育的影响是一个经常被忽视的研究领域.
研究的目的:
- 研究CIH对长骨发育的影响.
- 阐明CIH诱导的骨生长抑制背后的分子机制.
- 评估针对CIH相关骨质发育不良的PPARγ的治疗潜力.
主要方法:
- CIH在受控环境中诱导了4周.
- 通过物理测量,微型CT和组织学来评估骨生长.
- 使用多组学分析 (代谢学,单细胞转录学) 和分子测试 (西方斑点,ChIP-qPCR) 来探索机制.
- PPARγ抑制剂T0070907的疗效在CIH暴露的受试者身上进行了测试.
主要成果:
- CIH显著抑制了长骨生长.
- CIH诱导了厌氧糖解和脂生成分化,同时降低了骨髓中介质干细胞 (BM-MSC) 的骨质生成能力.
- 在CIH下,乳酸积累导致H3K18在PPARγ促进体上乳化,增加PPARγ转录,并促进脂肪生成而不是骨质生成.
- T0070907 部分挽救了CIH引起的骨发育异常.
结论:
- CIH通过一种涉及PPARγ激活的表观遗传机制诱导长骨发育不良.
- 用T0070907等药物准PPARγ为CIH诱导的骨发育障碍提供了潜在的治疗策略.
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