中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (17): 2665-2671.doi: 10.3969/j.issn.2095-4344.1729

• 骨髓干细胞 bone marrow stem cells • 上一篇    下一篇

熊果酸干预骨髓间充质干细胞增殖与成骨分化

刘耀辉1,黄振明1,何精选2,黄玲华1,李建平3   

  1. 1武汉市第九医院骨科,湖北省武汉市 430081;2长江航运总医院骨科,湖北省武汉市 430000;3武汉大学人民医院骨关节外科,湖北省武汉市 430000
  • 修回日期:2019-01-25 出版日期:2019-06-18 发布日期:2019-06-18
  • 通讯作者: 黄振明,主治医师,武汉市第九医院骨科,湖北省武汉市 430081
  • 作者简介:刘耀辉,男,1979年生,2004年湖北科技学院毕业,主治医师,主要从事骨科基础与临床研究工作。
  • 基金资助:

    中央高校基本科研业务费专项资金项目(2042016kf0095),项目负责人:李建平

Effects of ursolic acid on proliferation and differentiation of bone marrow mesenchymal stem cells

Liu Yaohui1, Huang Zhenming1, He Jingxuan2, Huang Linghua1, Li Jianping3   

  1. 1Department of Orthopedics, the Ninth Hospital of Wuhan, Wuhan 430081, Hubei Province, China; 2Department of Orthopedics, Yangtze River Shipping General Hospital, Wuhan 430000, Hubei Province, China; 3Department of Bone and Joint Surgery, Renmin Hospital of Wuhan University, Wuhan 430000, Hubei Province, China
  • Revised:2019-01-25 Online:2019-06-18 Published:2019-06-18
  • Contact: Huang Zhenming, Attending physician, Department of Orthopedics, the Ninth Hospital of Wuhan, Wuhan 430081, Hubei Province, China
  • About author:Liu Yaohui, Attending physician, Department of Orthopedics, the Ninth Hospital of Wuhan, Wuhan 430081, Hubei Province, China
  • Supported by:

    the Fundamental Research Funds for the Central Universities, No. 2042016kf0095 (to LJP)

摘要:

文章快速阅读:

文题释义:
熊果酸:
是一种五环三萜类化合物,广泛存在于枣、枇杷叶、夏枯草等天然植物中,毒性低,具有抗氧化、降血糖、抗肿瘤等活性功能。研究发现,适宜浓度的熊果酸可通过Wnt信号通路抑制破骨细胞增殖分化,对胶原诱导性关节炎模型大鼠有抗炎和骨保护作用,促进骨形成和逆转骨矿物质损失,具有抗骨质疏松作用。
Wnt信号通路:包括Wnt/β-catenin、Wnt/Ca2+、Wnt/PCP等,参与调控生命体生长、发育、衰老和死亡等生命过程,是细胞增殖分化、胚胎和器官发育的关键调控环节和信号转导途径之一。研究发现,Wnt信号通路在骨髓间充质干细胞增殖分化、成骨细胞生成、骨形成、骨重建等方面发挥重要作用,是目前骨骼系统相关疾病发病机制和骨代谢研究的新热点。

 

摘要
背景:
熊果酸可通过Wnt信号通路抑制破骨细胞增殖分化,对胶原诱导性关节炎模型大鼠有抗炎和骨保护作用,但是熊果酸对大鼠骨髓间充质干细胞增殖、分化以及Wnt/β-catenin信号通路相关基因和蛋白表达的影响尚不明确。
目的:探讨熊果酸对骨髓间充质干细胞增殖、分化及Wnt信号通路的影响。
方法:采用全骨髓贴壁法体外培养大鼠骨髓间充质干细胞,不同浓度(1.0,2.5,5.0,10.0,20.0 μmol/L)熊果酸作用骨髓间充质干细胞,以不含熊果酸的培养基为对照组,MTT法检测熊果酸对骨髓间充质干细胞增殖的影响。用含不同浓度(1.0,2.5,5.0 μmol/L)熊果酸的成骨诱导液培养骨髓间充质干细胞,以不含熊果酸的成骨诱导液为对照组,在诱导后第7天和第14天采用ELISA法检测碱性磷酸酶活性和骨钙素水平,在诱导第14天采用RT-PCR检测成骨基因ALP、COL-I、OCN、OPN、RUNX2 mRNA表达水平,采用RT-PCR和Western blot法检测Wnt信号通路相关Wnt-3α、GSK-3β、β-catenin mRNA和蛋白表达。
结果与结论:①不同浓度熊果酸均可促进骨髓间充质干细胞增殖,浓度为5.0 μmol/L时增殖率最高;②骨髓间充质干细胞成骨诱导第7天和第14天时碱性磷酸酶活性和骨钙素水平均比对照组增高,差异有显著性意义(P < 0.05),且诱导相同时间,随熊果酸浓度增加碱性磷酸酶活性增强,骨钙素水平升高(P < 0.05);③诱导14 d,熊果酸可促进骨髓间充质干细胞分化后成骨基因ALP、COL-I、OCN、OPN、RUNX2 mRNA表达以及Wnt信号通路相关Wnt-3α、GSK-3β、β-catenin mRNA和蛋白表达,随熊果酸浓度增加其表达水平升高(P < 0.05);④结果表明,熊果酸通过Wnt/β-catenin信号通路促进骨髓间充质干细胞向成骨细胞定向分化。


中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程
ORCID:
0000-0001-8175-9104(刘耀辉)

关键词: 熊果酸, 骨髓间充质干细胞, 细胞增殖, 成骨分化, 碱性磷酸酶, 骨钙素, 成骨基因, Wnt信号通路

Abstract:

BACKGROUND: Ursolic acid can inhibit the proliferation and differentiation of osteoclasts through Wnt signaling pathway, to exert anti-inflammatory and osteoprotective effects in rats with collagen-induced arthritis. However, it is unclear about the effects of ursolic acid on proliferation and differentiation of rat bone marrow mesenchymal stem cells and expression of Wnt/β-catenin signaling pathway-related genes and proteins.
OBJECTIVE: To investigate the effects of ursolic acid on proliferation, differentiation and Wnt signaling pathway of bone marrow mesenchymal stem cells. 
METHODS: Rat bone marrow mesenchymal stem cells were cultured in vitro by whole bone marrow adherence method, and then different concentrations of ursolic acid (1.0, 2.5, 5.0, 10.0, 20.0 μmol/L) acted on the cells. Cells with no treatment of ursolic acid were used as control group. MTT assay was used to detect the effect of ursolic acid on the proliferation of bone marrow mesenchymal stem cells. Differentiation of bone marrow mesenchymal stem cells was induced by osteogenic induction solution containing different concentrations of ursolic acid (1.0, 2.5, 5.0 μmol/L). Cells cultured in the osteogenic induction medium with no ursolic acid. Alkaline phosphatase activity and osteocalcin level were detected by ELISA at 7 and 14 days. RT-PCR was used to detect the mRNA levels of ALP, COL-I, OCN, OPN and RUNX2. The expressions of Wnt-3α, GSK-3β and β-catenin mRNAs and proteins related to Wnt signaling pathway were detected by RT-PCR and western blot, respectively. 
RESULTS AND CONCLUSION: (1) Different concentrations of ursolic acid could promote the proliferation of bone marrow mesenchymal stem cells, and the proliferative rate was highest when the cells were treated with 5.0 μmol/L ursolic acid. (2) Compared with the control group, the alkaline phosphatase activity and osteocalcin level were significantly higher at 7 and 14 days after osteoinduction (P < 0.05), and the alkaline phosphatase activity and osteocalcin level increased with the increasing concentration of ursolic acid. (3) At 14 days after osteoinduction, ursolic acid promoted the expression of osteogenic genes ALP, COL-I, OCN, OPN, RUNX2 mRNAs and Wnt signaling pathway-related Wnt-3α, GSK-3β and β-catenin mRNAs and proteins and the expression levels increased with the increasing concentration of ursolic acid (P < 0.05). To conclude, ursolic acid can promote the differentiation of bone marrow mesenchymal stem cells into osteoblasts via Wnt/β-catenin signaling pathway.

Key words: ursolic acid, bone marrow mesenchymal stem cells, cell proliferation, osteogenic differentiation, alkaline phosphatase, osteocalcin, osteogenic gene, Wnt signaling pathway

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