中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (19): 2777-2782.doi: 10.3969/j.issn.2095-4344.2016.19.006

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

辛伐他汀对骨髓基质干细胞特异性成骨分化基因表达的影响

刘  昊1,张  岩1,刘家寅1,刘光源1,张克忠1,张国彬2,邢  磊1,田发明3   

  1. 华北理工大学,1附属医院,2研究生学院,3医学实验研究中心,河北省唐山市  063000
  • 收稿日期:2016-03-17 出版日期:2016-05-06 发布日期:2016-05-06
  • 通讯作者: 田发明,博士,副教授,硕士生导师,华北理工大学医学实验研究中心,河北省唐山市 063000
  • 作者简介:刘昊,男,1982年生,河北省衡水市人,汉族,2008年华北煤炭医学院研究生部毕业,硕士,主治医师,主要从事骨与关节退行性疾病的研究。
  • 基金资助:

    河北省高等学校科学研究计划(QN20131007);河北省自然科学基金(H2013209255);唐山市老年医学重点实验室资助项目(14140221B)

Simvastatin effects on the expressions of specific osteogenic genes in bone marrow stromal stem cells

Liu Hao1, Zhang Yan1, Liu Jia-yin1, Liu Guang-yuan1, Zhang Ke-zhong1, Zhang Guo-bin2, Xing Lei1,Tian Fa-ming3   

  1. 1Affiliated Hospital, 2Graduate School, 3Medical Research Center, North China University of Science and Technology, Tangshan 063000, Hebei Province, China
  • Received:2016-03-17 Online:2016-05-06 Published:2016-05-06
  • Contact: Tian Fa-ming, M.D., Associate professor, Master’s supervisor, Medical Research Center of North China University of Science and Technology, Tangshan 063000, Hebei Province, China
  • About author:Liu Hao, Master, Attending physician, Affiliated Hospital of North China University of Science and Technology, Tangshan 063000, Hebei Province, China
  • Supported by:

    the Natural Science Foundation of Hebei, No. H2013209255; the Scientific Research Project of Hebei Universities and Colleges, No. QN20131007; Tangshan Key Laboratory Project of Geriatric Medicine, No. 14140221B

摘要:

文章快速阅读:


文题释义:
骨形态发生蛋白:
是转化生长因子超家族成员之一,其中骨形态发生蛋白2是公认的骨髓基质干细胞成骨分化的关键蛋白,不仅可以促进成骨细胞及其前体细胞的增殖,而且能够促进成骨细胞的分化,是骨髓基质干细胞成骨分化中晚期表达的特异性标志蛋白,国外首次发现辛伐他汀的成骨潜能即是通过筛选发现辛伐他汀可以刺激骨形态发生蛋白2启动子活性。
Ⅰ型胶原:由成骨细胞以原胶原的形式分泌,在骨骼与结缔组织中通过形成和保持骨架的完整性来发挥作用,在形成特定的细胞外微环境中也起到主要作用,而这些微环境对于维持细胞的完整性及传递细胞外信号起到关键作用。

摘要
背景:
以往研究表明降脂类药物辛伐他汀具有促进体外培养骨髓基质干细胞向成骨细胞分化的潜能,有望成为新型促成骨类药物,但干预不同时间点相应特异性成骨分化基因的表达是否有差异尚不得而知。
目的:观察辛伐他汀体外刺激不同时间点大鼠骨髓基质干细胞骨形态发生蛋白2和Ⅰ型胶原的表达。
方法:取第1代骨髓基质干细胞分为两组,对照组加入成骨诱导培养基培养,辛伐他汀组在对照组基础上加入终浓度为10-7 mol/L的辛伐他汀培养,干预第7天检测第3代细胞碱性磷酸酶的表达。取第4代骨髓基质干细胞分为两组,对照组加入成骨诱导培养基培养,辛伐他汀组在对照组基础上加入终浓度为10-7 mol/L的辛伐他汀培养,干预12 h和36 h提取细胞RNA及蛋白,采用Realtime PCR 和Western blot 法检测骨形态发生蛋白2和Ⅰ型胶原的表达。
结果与结论:①两组细胞均有碱性磷酸酶分泌,辛伐他汀组大鼠碱性磷酸酶阳性细胞比例显著高于对照组(P < 0.05);②辛伐他汀组2个时间点骨形态发生蛋白2和Ⅰ型胶原mRNA表达均显著高于对照组 (P < 0.05);③Western blot 法检测辛伐他汀组2个时间点骨形态发生蛋白2的表达均显著高于对照组(P < 0.05);辛伐他汀组Ⅰ型胶原蛋白的表达于12 h显著高于对照组(P < 0.05),36 h无显著差别;④以上结果提示,辛伐他汀可以促进大鼠骨髓基质干细胞向成骨细胞分化晚期特异性标志蛋白骨形态发生蛋白2和Ⅰ型胶原的表达,药物刺激12 h较36 h作用更显著。 

关键词: 干细胞, 骨髓基质干细胞, 辛伐他汀, 碱性磷酸酶, 骨形态发生蛋白2, Ⅰ型胶原, 河北省自然科学基金

Abstract:

BACKGROUND: Previous studies have demonstrated that simvastatin that can promote osteogenic differentiation of bone marrow stromal stem cells in vitro, is likely to be a new osteogenic drug. While it is still unknown whether there is time-dependent stimulation of simvastatin on the expressions of bone morphogenetic protein 2 and collagen type I.
OBJECTIVE: To investigate the expressions of bone morphogenetic protein 2 and collagen type I in rat bone marrow stromal stem cells in vitro stimulated by simvastatin at different time points.
METHODS: Passage 1 bone marrow stromal cells were divided into control and simvastatin group, followed by cultured in osteogenic differetiation medium with or uithout 10-7 mol/L simvastatin. After 7-day intervention, expression of alkaline phosphatase was detected in passage 3 cells. Passage 4 cells were divided and cultured as described above, and afterwards, RNA and proteins were extracted at 12 and 36 hours to detect the expressions of bone morphogenetic protein 2 and collagen type I using real-time PCR and western blot assay.
RESULTS AND CONCLUSION: Both two groups could express alkaline phosphatase, while the rate of positive cells significantly increased in the simvastatin group compared with the control group (P < 0.05); at 12 and 36 hours after intervention, mRNA expressions of bone morphogenetic protein 2 and collagen type I in the simvastatin group were significantly higher than those in the control group (P < 0.05). Besides, western blot assay showed: at both 12 and 36 hours, simvastatin significantly enhanced the expression of bone morphometric protein 2, while the expression of collagen type I significantly increased at 12 hours (P < 0.05), but not at 36 hours. In conclusion, simvastatin can promote the expressions of bone morphometric protein 2 and collagen type I in rat bone marrow stromal cells, with more favorable outcomes after 12-hour treatment.

 

 

Key words: Bone Marrow, Mesenchymal Stem Cells, Simvastatin, Bone Morphogenetic Proteins, Collagen Type I, Tissue Engineering

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