口腔医学研究 ›› 2015, Vol. 31 ›› Issue (6): 571-574.

• 基础研究论著 • 上一篇    下一篇

骨形态发生蛋白6对张应力下大鼠骨髓间充质干细胞成骨分化的影响

张号, 熊波, 蒋校文*, 鲁坤, 李芬芳   

  1. 南华大学附属郴州市第一人民医院口腔科·南华大学转化医学研究所 湖南 郴州 423000
  • 收稿日期:2014-11-05 出版日期:2015-06-28 发布日期:2016-04-29
  • 通讯作者: 蒋校文,电话:0735-2343899
  • 作者简介:张号(1984~ ),男,江苏人,硕士在读,主治医师,主要从事口腔科的临床治疗工作。
  • 基金资助:
    国家自然基金(编号:81301651);郴州市科技局项目(编号:CZ2013067)

Effect of BMP-6 on the Osteogenesis of Rat Bone Marrow Mesenchymal Stem Cells under Stress Tensile.

ZHANG Hao, XIONG Bo, JIANG Xiao-wen, et al.   

  1. Department of Stomatology, the First People’s Hospital of Chenzhou & Institute of Translation Medicine, University of South China, Chenzhou 423000
  • Received:2014-11-05 Online:2015-06-28 Published:2016-04-29

摘要: 目的:探讨骨形态发生蛋白-6(BMP-6)对张应力作用下大鼠骨髓间充质干细胞(BMMSCs)成骨向分化的影响。方法:应用四点弯曲加力系统对体外分离培养大鼠BMMSCs施加不同大小的周期单一张应力60 min,2 h后检测检测内源性BMP-6的表达量,同时检测碱性磷酸酶、骨钙素表达量和进行成骨细胞转录因子-2mRNA定量分析。然后对体外分离培养转染人BMP-6复制缺陷型病毒的大鼠BMMSCs施加4000μstrain的周期单一张应力60 min,2 h后检测成骨标志表达。结果:随着张应力的增大,BMP-6的表达逐渐增强,同时成骨能力亦增强,但2000 μstrain以后BMP-6的表达与成骨能力均下降。4000 μstrain条件下2 h后转染人BMP-6基因的大鼠BMMSCs各项成骨标志因子的检测明显强于转染空白病毒。结论:适当的张应力可促进BMP-6表达上调和BMMSCs骨向分化,上调BMP-6的表达可以恢复过大张应力所致的成骨能力下降。

关键词: 张应力, 骨髓间充质干细胞, 腺病毒, 骨形态发生蛋白

Abstract: Objective: To evaluate the impact of BMP-6 on the osteogenesis of rat bone marrow-derived mesenchymal stem cells under tensile stress. Methods: Different tensile stress was applied on rat BMMSCs by four-point bending apparatus for 60 minutes. Two hours later, the changes of the BMP-6 mRNA level and alkaline phosphate, osteocalcin and runt-related transcription factor 2 mRNA level were examined. Then under the poor osteogenesis condition(4000μstrain), the BMP-6 adenovirus transfected BMMSCs and control BMMSCs were also performed the same test to evaluate the osteogenic ability. Results: With the increase of tensile stress, the expression of BMP-6 was gradually increased, so was the osteogenic capacity. However, both of the BMP-6 expression and osteogenic capacity decreased obviously after the tensile stress exceeded 2000μstrain. Under the 4000μstrain stress tensile, the transfected cells presented better osteogenic ability than control cells. Conclusion: The proper tensile stress would promote BMP-6 expression and BMMSCs osteogensis. The BMP-6 would recover the compromised osteogenic ability by major stress tensile.

Key words: Tensile stress , Bone marrow-derived mesenchymal stem cells , Adenovirus, BMP

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