中国组织工程研究 ›› 2022, Vol. 26 ›› Issue (20): 3236-3242.doi: 10.12307/2022.627

• 软骨组织构建 cartilage tissue construction • 上一篇    下一篇

黄芪多糖干预对骨关节炎模型小鼠关节软骨损伤的修复

史桂荣1,任博文2,张仲博2,王莉莎2,张啟威2,史栋梁2   

  1. 1商丘医学高等专科学校临床医学院中医教研室,河南省商丘市   476299;2河南省中医院骨病一科,河南省郑州市   450000
  • 收稿日期:2021-04-30 接受日期:2021-07-10 出版日期:2022-07-18 发布日期:2022-01-19
  • 通讯作者: 史栋梁,硕士,副主任医师,主要从事骨损伤方面的研究。
  • 作者简介:史桂荣,女,1970年生,河南省商丘市人,汉族,2006年河南省中医院毕业,硕士,副教授,主要从事骨与关节相关疾病的研究。

Astragalus polysaccharides repair articular cartilage damage in a mouse osteoarthritis model

Shi Guirong1, Ren Bowen2, Zhang Zhongbo2, Wang Lisha2, Zhang Qiwei2, Shi Dongliang2   

  1. 1Department of Traditional Chinese Medicine, Clinical College of Shangqiu Medical College, Shangqiu 476299, Henan Province, China; 2First Department of Orthopedics, Henan Province Hospital of Traditional Chinese Medicine, Zhengzhou 450000, Henan Province, China
  • Received:2021-04-30 Accepted:2021-07-10 Online:2022-07-18 Published:2022-01-19
  • Contact: Shi Dongliang, Master, Associate chief physician, First Department of Orthopedics, Henan Province Hospital of Traditional Chinese Medicine, Zhengzhou 450000, Henan Province, China
  • About author:Shi Guirong, Master, Associate professor, Department of Traditional Chinese Medicine, Clinical College of Shangqiu Medical College, Shangqiu 476299, Henan Province, China

摘要:

文题释义:
骨关节炎:又称为骨关节病、退行性关节病和骨质增生,是一种最常见的关节疾病。该病不仅发生关节软骨损害,还累及整个关节,包括软骨下骨、韧带、关节囊、滑膜和关节周围肌肉,最终发生关节软骨退变、纤维化、断裂、溃疡及整个关节面的损害。典型的临床表现包括疼痛、僵硬和关节变形。
泛素化:是指泛素蛋白在一系列特殊酶的作用下,将细胞内的蛋白质分类,从中选出靶蛋白分子,并对靶蛋白进行特异性修饰的过程。蛋白质泛素化的结果是使得被标记的蛋白质被蛋白酶分解为较小的多肽、氨基酸以及可以重复使用的泛素。

背景:黄芪多糖对骨关节炎有确切疗效,但其作用机制还不清楚。
目的:探讨黄芪多糖调控包含WW域的E3泛素蛋白连接酶2(WW domain containing E3 ubiquitin protein ligase 2,WWP2)介导的Notch受体1泛素化对骨关节炎的影响。
方法:①体内实验:30只C57BL/6小鼠随机分为假手术组、模型组、黄芪多糖组,每组10只。除假手术组外,构建小鼠骨关节炎模型,黄芪多糖组给予黄芪多糖干预,干预4周后麻醉小鼠取膝关节组织,番红O染色法、国际骨关节炎研究协会评分评估小鼠关节软骨损伤情况。②体外实验:采用5 μg/L白细胞介素1β培养C28/12细胞24 h建立骨关节炎细胞模型,分为对照组、白细胞介素1β组、50 mg/L 黄芪多糖处理组、黄芪多糖联合Notch受体1过表达或WWP2干扰组。MTT法检测细胞增殖,流式细胞术测凋亡,蛋白质免疫共沉淀实验用于验证WWP2和Notch受体1的结合,泛素化实验分析黄芪多糖对WWP2介导的Notch受体1泛素化水平的影响,酶联免疫吸附法检测小鼠膝关节组织和C28/12细胞中蛋白聚糖、Ⅱ型胶原、基质金属蛋白酶3和基质金属蛋白酶13水平,免疫印迹法检测小鼠膝关节组织和C28/12细胞中WWP2、Notch受体1、锯齿状Notch配体1和Notch胞内域1蛋白的表达。
结果与结论:①体内实验结果证实,黄芪多糖干预缓解了小鼠软骨损伤,抑制了膝关节组织基质金属蛋白酶3和基质金属蛋白酶13水平,增加了蛋白聚糖和Ⅱ型胶原表达水平;②体外实验结果证实,黄芪多糖干预促进了细胞增殖、蛋白聚糖、Ⅱ型胶原及WWP2的表达,抑制了细胞凋亡、基质金属蛋白酶3和基质金属蛋白酶13水平、Notch受体1、锯齿状Notch配体1和Notch胞内域1蛋白的表达,Notch受体1过表达和WWP2干扰逆转了黄芪多糖的作用;③黄芪多糖促进了WWP2介导的Notch受体1的泛素化水平;④结果表明,黄芪多糖通过提高WWP2介导的Notch受体1泛素化水平,抑制Notch信号通路,对小鼠骨关节炎起到一定的治疗作用。
缩略语:包含WW域的E3泛素蛋白连接酶2:WW domain containing E3 ubiquitin protein ligase 2,WWP2;国际骨关节炎研究协会:Osteoarthritis Research Society International,OARSI

https://orcid.org/0000-0003-1120-1417 (史桂荣) 

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程

关键词: 黄芪多糖, WWP2, 泛素化, Notch受体1, 骨关节炎

Abstract: BACKGROUND: Astragalus polysaccharide has a definite effect on osteoarthritis, but its mechanism of action is still unclear.  
OBJECTIVE: To investigate the effects of astragalus polysaccharide on osteoarthritis through regulating ubiquitination of Notch receptor 1 mediated by WW domain containing E3 ubiquitin protein ligase 2 (WWP2).
METHODS:  In the in vivo experiment, 30 C57BL/6 mice were randomly divided into 3 groups (n=10): a sham operation group, a model group, and an astragalus polysaccharide group. A mouse osteoarthritis model was established in the model and astragalus polysaccharide groups. Mice in the astragalus polysaccharide group were treated with astragalus polysaccharide. After 4 weeks of intervention, the knee joint tissue was taken under anesthesia. Safranin O staining method and Osteoarthritis Research Society International score were used to evaluate the damage of articular cartilage in mice. In the in vitro experiment, C28/12 cells were cultured with 5 μg/L interleukin 1β for 24 hours to establish osteoarthritis cell models, which were divided into a control group, an interleukin 1β group, a 50 mg/L astragalus polysaccharide group, and an astragalus polysaccharide-Notch receptor 1 overexpression and a WWP2 interference group. 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay was used to detect cell proliferation. Flow cytometry was used to detect apoptosis. Co-immunoprecipitation assay was used to verify the binding of WWP2 and Notch receptor 1. Ubiquitination experiment was used to analyze the effect of astragalus polysaccharides on the ubiquitination of Notch receptor 1 mediated by WWP2. Enzyme-linked immunosorbent assay was used to detect the levels of proteoglycans, type II collagen, matrix metallopeptidase 3, and matrix metallopeptidase 13 in mouse knee joint tissue and C28/12 cells. Western blot assay was used to detect the protein expression of WWP2, Notch receptor 1, jagged canonical Notch ligand 1, and Notch intracellular domain 1 in mouse knee joint tissue and C28/12 cells.  
RESULTS AND CONCLUSION: The results of in vivo experiments confirmed that intervention of astragalus polysaccharides alleviated cartilage damage in mice, inhibited the levels of matrix metallopeptidase 3 and matrix metallopeptidase 13, and promoted the expression of proteoglycans and type II collagen in mouse knee joint tissue. The results of in vitro experiments confirmed that the intervention of astragalus polysaccharides promoted cell proliferation and the expression of proteoglycan, type II collagen, and WWP2, and inhibited cell apoptosis and the expression of matrix metallopeptidase 3 and matrix metallopeptidase 13, Notch receptor 1, jagged canonical Notch ligand 1, and Notch intracellular domain 1, while Notch receptor 1 overexpression and WWP2 interference reversed the effect of astragalus polysaccharides. Astragalus polysaccharides promoted the ubiquitination of Notch receptor 1 mediated by WWP2. To conclude, astragalus polysaccharides can play a certain therapeutic effect on mouse osteoarthritis by increasing the WWP2-mediated ubiquitination level of Notch receptor 1 and inhibiting the Notch signaling pathway.

Key words: astragalus polysaccharide, WW domain containing E3 ubiquitin protein ligase 2, ubiquitination, Notch receptor 1, osteoarthritis

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