从糖尿病血清中提取的外体细胞加速了骨关节炎的进展
1First Clinical Medical College of Gansu University of Traditional Chinese Medicine, Gansu, 730000, PR China; Department of Orthopedics, Gansu Provincial Hospital, Gansu, 730000, PR China.
Archives of biochemistry and biophysics
|March 21, 2024
概括
糖尿病会通过携带miR-130b-3p的脂肪细胞衍生外体来加剧骨关节炎. 这种微RNA通过向AMPKα1/SIRT1/PGC-1α途径,损害了状细胞的线粒体功能,恶化了关节损伤.
科学领域:
- 生物医学科学 生物医学科学
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 已知糖尿病 (DM) 通过不太了解的机制加速骨关节炎 (OA) 的进展.
- 在DM中,功能障碍的脂肪细胞衍生外体与远程器官损伤有关.
- 这些外体在OA病变发生中的作用需要进一步阐明.
研究的目的:
- 调查是否以及如何糖尿病脂肪细胞衍生外体调解骨关节炎的病理调节.
- 确定参与这种相互作用的特定分子机制.
主要方法:
- 在非糖尿病小鼠体内注射DM血清外体.
- 对状细胞亡,线粒体膜潜力 (ΔΨ) 和分裂的caspase-3表达的分析.
- 在外体和软质细胞中量化miR-130b-3p.
- 用miR-130b-3p模仿染色体的感染以及线粒体功能和关键通路蛋白质 (AMPKα1,SIRT1,PGC-1α) 的评估.
- 使用AICAR进行AMPKα1的药理活性.
主要成果:
- DM血清外基因组加剧了OA损伤,增加了冠状细胞亡和减少了线粒体功能.
- 在DM小鼠和高葡萄糖治疗脂肪细胞的外体中,miR-130b-3p显著升高.
- miR-130b-3p传染损害了冠状细胞的线粒体功能,降低了 ΔΨ,增加了分裂的 caspase-3,并降低了 AMPKα1,SIRT1 和 PGC-1α 表达.
- 艾卡尔治疗逆转了这些影响,表明AMPKα1激活的保护作用.
结论:
- 在糖尿病条件下,由脂肪细胞衍生的外体miR-130b-3p抑制了状细胞的线粒体功能.
- 这种抑制通过向AMPKα1/SIRT1/PGC-1α通路而发生.
- 这种机制有助于糖尿病患者骨关节炎的恶化.
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