中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (25): 3961-.doi: 10.3969/j.issn.2095-4344.1769

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

辛伐他汀刺激骨髓间充质干细胞的成骨分化

邢  磊1,高静媛1,汪晓旭1,陈俞洁1,迟博婧1,田发明2
  

  1. 1华北理工大学附属医院老年病科,河北省唐山市  063000;2华北理工大学医学实验研究中心,河北省唐山市  063000
  • 修回日期:2019-03-06 出版日期:2019-09-08 发布日期:2019-09-08
  • 通讯作者: 高静媛,副主任医师,华北理工大学附属医院老年病科,河北省唐山市 063000
  • 作者简介:邢磊,男,1978年生,汉族,硕士,副主任医师,主要从事骨质疏松、骨性关节炎等中老年疾病的基础与临床研究。
  • 基金资助:

    河北省自然科学基金项目(H2013209255),项目负责人:田发明;河北省高等学校科学研究计划(QN20131007),项目负责人:田发明

Simvastatin promotes osteogenic differentiation of bone marrow mesenchymal stem cells

Xing Lei1, Gao Jingyuan1, Wang Xiaoxu1, Chen Yujie1, Chi Bojing1, Tian Faming2
  

  1. 1Department of Geriatrics, the Affiliated Hospital of North China University of Science and Technology, Tangshan 063000, Hebei Province, China; 2Medical Experimental Research Center of North China University of Science and Technology, Tangshan 063000, Hebei Province, China
  • Revised:2019-03-06 Online:2019-09-08 Published:2019-09-08
  • Contact: Gao Jingyuan, Associate chief physician, Department of Geriatrics, the Affiliated Hospital of North China University of Science and Technology, Tangshan 063000, Hebei Province, China
  • About author:Xing Lei, Master, Associate chief physician, Department of Geriatrics, the Affiliated Hospital of North China University of Science and Technology, Tangshan 063000, Hebei Province, China
  • Supported by:

    the Natural Science Foundation of Hebei Province, No. H2013209255 (to TFM); Higher Education Research Plan of Hebei Province, No. QN20131007 (to TFM)

摘要:

文章快速阅读:

文题释义:
Hedgehog信号转导通路:
是一个经典的控制胚胎发育的信号转导通路,在胚胎发育和胚胎形成后细胞的生长、分化过程中起着重要的作用。Hedgehog信号通路的异常激活与肿瘤发生有关,很多参与肿瘤细胞增殖、扩散的效应分子(如n-Myc、EGF、CyclinD、CyclinE、CyclinB、BMP等)被证明是Hedgehog信号通路的靶基因或下游分子。此外Hedgehog信号通路与很多已知调控细胞分化增殖的其他信号通路(如Notch、Wnt等)还有交叉作用。
Ⅰ型胶原蛋白:是骨组织中含量最丰富的蛋白质,对于维持骨骼结构完整性及骨强度具有重要作用。Ⅰ型胶原代谢异常可能引起胶原数量减少或结构紊乱,导致骨密度降低、骨强度减弱。

 

摘要
背景:
体外研究显示辛伐他汀有明确的刺激骨髓间充质干细胞成骨分化的作用,但机制不清。最新研究显示Hedgehog信号通路是骨髓间充质干细胞成骨分化的重要信号通路。
目的:结合Hedgehog通路阻断剂环杷明的应用,观察辛伐他汀体外刺激大鼠骨髓间充质干细胞成骨分化的作用机制。
方法:4周龄SPF级雌性 SD大鼠8只,分离出股骨和胫骨并去除干骺端,应用全骨髓贴壁培养法提取骨髓间充质干细胞。选取第2代骨髓间充质干细胞随机分成4组:①对照组:用成骨诱导培养基培养;②辛伐他汀组:用含有10-7 mol/L辛伐他汀的成骨诱导培养基培养;③辛伐他汀+阻断剂组:用含5 μmol/L环杷明的完全培养基预先阻断2 h后,与辛伐他汀组同时加入含辛伐他汀的成骨诱导培养基培养;④阻断剂组:用含有5 μmol/L环杷明的成骨诱导培养基培养。给药第7天行碱性磷酸酶染色,免疫荧光染色法和Western blot检测Ⅰ型胶原、骨钙素的表达;给药第28天行茜素红钙染色。
结果与结论:辛伐他汀组与对照组比较,碱性磷酸酶阳性着色细胞和钙结节增多,Ⅰ型胶原、骨钙素荧光强度和相应蛋白表达增高(P < 0.05);除骨钙素荧光强度和蛋白表达外,其他指标在辛伐他汀+阻断剂组显著低于辛伐他汀组(P < 0.05);阻断剂组各项指标均低于对照组(P < 0.05)。结果证实辛伐他汀通过刺激Hedgehog信号通路促进骨髓间充质干细胞成骨分化,且不完全被环杷明阻断。


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: 0000-0001-6651-0466(高静媛)

关键词: 骨质疏松, 骨髓间充质干细胞, 辛伐他汀, 环杷明, Ⅰ型胶原, 骨钙素, 成骨分化, 河北省自然科学基金

Abstract:

BACKGROUND: In vitro studies have shown that simvastatin can stimulate osteogenic differentiation of bone marrow mesenchymal stem cells, but the mechanism is unclear. Recent studies have shown that the Hedgehog signaling pathway is crucial for osteogenic differentiation of bone marrow mesenchymal stem cells.
OBJECTIVE: In combination with Hedgehog pathway blocker (cyclopamine), to observe the effect of simvastatin on osteogenic differentiation of rat bone marrow mesenchymal stem cells in vitro.
METHODS: Eight 4-week-old Sprague-Dawley female rats, SPF grade, were used in this study. The rats were killed by cervical dislocation and removed of bilateral femur and tibia under sterilization conditions. The second generation of bone marrow mesenchymal stem cells was randomly divided into four groups: control group cultured with osteogenic induction medium; simvastatin group cultured in the induction medium containing 10-7 mol/L simvastatin; simvastatin+cyclopamine group (combination group) cultured in complete culture medium containing 5 μmol/L cyclopamine for 2 hours and then cultured in the induction medium containing 10-7 mol/L simvastatin; cyclopamine group cultured in the osteogenic induction medium containing 5 μmol/L cyclopamine. After 7 days of culture, alkaline phosphatase staining was used. The levels of type I collagen and osteocalcin were evaluated by immunofluorescence and western blot assay. Alizarin red S staining was performed at 28 days of culture.
RESULTS AND CONCLUSION: Compared with the control group, the simvastatin group had more alkaline phosphatase positive cells and calcium nodules, and higher type I collagen and osteocalcin fluorescence intensities (P < 0.05). All the measurement indexes except for osteocalcin fluorescence intensity and protein expression were significantly lower in the combination group than the simvastatin group (P < 0.05). All the measurement indexes in the cyclopamine group were significantly lower than those in the control group (P < 0.05). To conclude, simvastatin can promote osteogenic differentiation of bone marrow mesenchymal stem cells via Hedgehog signaling pathway that cannot be completely blocked by cyclopamine.

Key words: osteoporosis, bone marrow mesenchymal stem cells, simvastatin, cyclopamine, type I collagen, osteocalcin, osteogenic differentiation, Natural Science Foundation of Hebei Province

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