Rheumatology:二甲双胍通过靶向软骨细胞、滑膜巨噬细胞和脂肪细胞减轻骨关节炎

2022-08-22 紫菀款冬 MedSci原创

探讨二甲双胍对正常饮食(ND)小鼠和高脂饮食(HFD)诱导的肥胖小鼠膝骨关节炎(OA)的治疗作用及其机制。

目的:探讨二甲双胍正常饮食(ND)小鼠高脂饮食(HFD)诱导的肥胖小鼠膝骨关节炎(OA)的治疗作用及其机制。

方法:在ND小鼠或HFD小鼠中进行内侧半月板失稳手术,并在饮用水中添加/不添加二甲双胍。

评估OA关节结构、滑膜巨噬细胞浸润和极化、循环、局部瘦素和脂联素水平的变化

在体外,检测了二甲双胍对软骨细胞和巨噬细胞的影响,以及来自小鼠腹部脂肪的条件培养基对小鼠软骨细胞系ATDC5和小鼠巨噬细胞细胞系RAW264.7的影响。

结果:二甲双胍对OA有保护作用,其特征是治疗10周后OARSI评分降低[ND小鼠为2.00,95% CI(1.15-2.86);HFD小鼠为3.17,95% CI (2.37-3.96)]以及滑膜炎评分降低[ND鼠为1.17,90% CI(0.27-2.06);HFD鼠为2.50,95% CI(1.49-3.51)] 。

此外,HFD小鼠的效果比ND小鼠更显著

从机制上讲,二甲双胍除了减少软骨细胞的凋亡和基质降解酶表达以及滑膜巨噬细胞的浸润和促炎分化外,还减少了HFD小鼠脂肪组织的瘦素分泌。

结论:二甲双胍可通过减少软骨细胞的凋亡和分解代谢,抑制滑膜巨噬细胞的浸润和促炎极化来保护膝关节OA对于肥胖小鼠,二甲双胍通过减少脂肪组织的瘦素分泌,对膝关节OA具有更大的保护作用

 

文献来源:

Li D, Ruan G, Zhang Y, et al. Metformin attenuates osteoarthritis by targeting chondrocytes, synovial macrophages and adipocytes [published online ahead of print, 2022 Aug 19]. Rheumatology (Oxford). 2022;keac467. doi:10.1093/rheumatology/keac467

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    2023-05-04 lisa438
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    2022-12-03 宽新108 来自广东省

    、学习了

    0

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    2022-08-23 lmm397
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