高脂肪和高碳水化合物饮食通过TGF-β依赖的控制骨细胞功能来增加骨脆弱性
Neha S Dole1,2, Andrés Betancourt-Torres1, Serra Kaya1
1Department of Orthopaedic Surgery, University of California, San Francisco, San Francisco, California, USA.
JCI insight
|August 22, 2024
概括
肥胖通过TGF-β信号传递损害骨细胞功能,削弱骨. 抑制这种途径可以改善肥胖小鼠的骨质量和代谢健康,提供潜在的治疗点.
科学领域:
- 骨生物学 骨生物学
- 代谢性疾病研究研究.
- 蜂信号传输是如何进行的
背景情况:
- 肥胖与骨脆弱性增加有关,尽管骨质量正常.
- 骨质差,由于基因材料缺陷,是关键因素.
- 与肥胖相关的骨脆弱性背后的细胞和分子机制尚未完全理解.
研究的目的:
- 调查TGF-β信号传递在肥胖引起的骨脆弱性中的作用.
- 了解饮食诱导的肥胖如何影响骨细胞功能和骨质.
- 探索调节骨细胞中TGF-β信号传递的治疗潜力.
主要方法:
- 使用的雄性小鼠模型食高碳水化合物和高脂肪饮食以诱导肥胖.
- 研究了骨细胞中的TGF-β信号通路.
- 评估了线粒体功能,细胞衰老和periacunar/canalicular重塑.
- 在骨细胞中基因抑制的TGF-β信号传递 (DMP1-Cre介导的TGF-β受体II的删除).
- 评估了骨的机械特性和代谢参数.
主要成果:
- 高碳水化合物和高脂肪饮食增加了骨细胞中的TGF-β信号传递.
- 这种增加导致线粒体功能受损,衰老增加,骨质受损.
- 抑制骨细胞中TGF-β信号传递对骨质,沟网络和机械性质的负面影响有所缓解.
- 删除TGF-β受体II也改善了能量平衡和新陈代谢.
结论:
- 骨细胞在调节骨质量方面发挥着至关重要的作用,以应对饮食引起的代谢变化.
- 骨细胞中的TGF-β信号传递是与肥胖相关的骨脆弱性的关键调解者.
- 向骨细胞功能和TGF-β信号传递可能提供一种策略,以打击代谢性疾病中的骨脆弱性.
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