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Updated: May 21, 2025

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乳酸盐通过Gpr81-Stat3信号传递诱导骨质母细胞中的氧化酸化
Xiping Hu1, Jin Shen1, Ruijian Wang1
1MOE Medical Basic Research Innovation Center for Gut Microbiota and Chronic Diseases, Wuxi School of medicine, Jiangnan University, China; Lab of Modern Environmental Toxicology, School of Public Health Research, Wuxi School of Medicine, Jiangnan University, Wuxi, Jiangsu, China.
Cellular signalling
|May 19, 2025
概括
乳酸盐通过激活Gpr81-Stat3信号来增强骨质细胞分化和氧化酸化 (OXPHOS). 这项研究揭示了乳酸盐.
科学领域:
- 生物化学 生化学
- 细胞生物学 细胞生物学
- 骨生物学 骨生物学 骨生物学
背景情况:
- 乳酸盐,曾经被认为是代谢废物,现在被认为是其在能量代谢和细胞信号传递中的作用.
- 乳酸在骨质分化中的作用及其潜在的代谢机制在很大程度上仍未被探索.
研究的目的:
- 通过代谢重编程,研究乳酸是否促进骨质分化.
- 阐明参与乳酸介导骨质细胞分化中的信号通路.
主要方法:
- 使用骨质前MC3T3-E1细胞进行细胞培养实验.
- 对细胞ATP含量,糖酸脱酶活性和氧气消耗率的分析.
- 微阵列,RNA测序和免疫阻塞分析.
- 药物抑制和信号分子的基因淘汰 (Jak2, Stat3, Gpr81, MCT1). 药物抑制和信号分子的基因淘汰.
- 在缺乏Gpr81的小鼠身上进行的研究.
主要成果:
- 乳酸酸增加了ATP含量,糖酸脱酶活性,以及MC3T3-E1细胞中的氧气消耗率.
- 乳酸盐治疗增强了副甲状腺激素 (PTH) 治疗细胞中的氧化酸化 (OXPHOS).
- 乳酸激活了Jak2-Stat3-Y705和Akt-Stat3-S727信号传递,这对于骨质细胞分化至关重要.
- Gpr81调解了乳酸对Stat3信号,OXPHOS和细胞分化的影响.
- 在小鼠中,骨质细胞特异性Gpr81缺乏导致骨形成减少.
结论:
- 乳酸盐促进骨质分化,并通过Gpr81-Stat3信号通路增强OXPHOS.
- 这项研究揭示了乳酸在调节骨细胞分化和新陈代谢中的新机制.
- 针对乳酸盐-Gpr81-Stat3轴可能为骨疾病提供新的治疗策略.
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