中国神经再生研究(英文版) ›› 2015, Vol. 10 ›› Issue (1): 119-123.doi: 10.4103/1673-5374.150717

• 原著:脊髓损伤修复保护与再生 • 上一篇    下一篇

背根神经节神经元可促进骨髓间充质干细胞的增殖和成骨分化

  

  • 收稿日期:2014-12-15 出版日期:2015-01-15 发布日期:2015-01-15
  • 基金资助:

    烟台科技发展计划(2011207,2011209),山东省自然科学基金项目(y2008c18);国家自然科学基金(31271284,81301570),教育部新世纪优秀人才支持项目(bmu20110270),中国国家科学技术部973项目规划(2014cb542200)

Dorsal root ganglion neurons promote proliferation and osteogenic differentiation of bone marrow mesenchymal stem cells

Pei-xun Zhang 1, #, Xiao-rui Jiang 2, #, Lei Wang 2, Fang-min Chen 2, Lin Xu 2, *, Fei Huang 3, *   

  1. 1 Department of Trauma and Orthopedics, Peking University People’s Hospital, Beijing, China
    2 Department of Orthopedics, the Affiliated Yantai Hospital of Binzhou Medical University, Yantai, Shandong Province, China
    3 Department of Human Anatomy, Binzhou Medical University, Yantai, Shandong Province, China
  • Received:2014-12-15 Online:2015-01-15 Published:2015-01-15
  • Contact: Lin Xu, M.D., Yantaixulin@126.com. Fei Huang, M.D., hfei22518@163.com.
  • Supported by:

    This study was supported by grants from the National Program on Key Basic Research Project of China (973 Program), No. 2014CB542200; the National Natural Science Foundation of China, No. 31271284, 81301570; Program for New Century Excellent Talents in University of Ministry of Education of China, No. BMU20110270; the Natural Science Foundation of Shandong Province of China, No. Y2008C18; Yantai Science and Technology Development Program  of China, No. 2011207, 2011209. 

摘要:

我们前期的动物实验已经证实了感觉神经纤维对成骨分化有明显的促进作用,而运动神经纤维则影响不显著。那么感觉神经元细胞是否可以促进骨髓间充质干细胞增殖及向成骨方向分化呢?以往的研究均是动物体内实验结果,未见细胞层面的验证结果。鉴于此,实验将体外培养SD大鼠胎鼠的脊髓背根神经节神经元(感觉神经元细胞),和体外向成骨诱导分化3周转染绿色荧光蛋白的骨髓间充质干细胞直接进行共培养,并将单纯骨髓间充质干细胞分化来源的成骨细胞设为对照组。共培养3,5 d时,荧光显微镜观察,大鼠背根神经节神经元对骨髓间充质干细胞来源的成骨细胞有明显促增殖作用;实时定量PCR检测显示共培养组成骨分化相关因子-碱性磷酸酶、骨钙素、骨桥蛋白和骨形态发生蛋白2 mRNA 表达均高于对照组。结果证实背根神经节神经元可以促进骨髓间充质干细胞增殖并向成骨细胞方向分化,此结果为构建神经化组织工程骨提供了体外实验的理论依据。

关键词: 神经再生, 骨髓间充质干细胞, 骨, 成骨细胞, 神经节, 脊柱, 神经元, 共培养技术, 增殖, 分化, 实时定量PCR, 国家自然科学基金

Abstract:

Preliminary animal experiments have confirmed that sensory nerve fibers promote osteoblast differentiation, but motor nerve fibers have no promotion effect. Whether sensory neurons promote the proliferation and osteogenic differentiation of bone marrow mesenchymal stem cells remains unclear. No results at the cellular level have been reported. In this study, dorsal root ganglion neurons (sensory neurons) from Sprague-Dawley fetal rats were co-cultured with bone marrow mesenchymal stem cells transfected with green fluorescent protein 3 weeks after osteogenic differentiation in vitro, while osteoblasts derived from bone marrow mesenchymal stem cells served as the control group. The rat dorsal root ganglion neurons promoted the proliferation of bone marrow mesenchymal stem cell-derived osteoblasts at 3 and 5 days of co-culture, as observed by fluorescence microscopy. The levels of mRNAs for osteogenic differentiation-related factors (including alkaline phosphatase, osteocalcin, osteopontin and bone morphogenetic protein 2) in the co-culture group were higher than those in the control group, as detected by real-time quantitative PCR. Our findings indicate that dorsal root ganglion neurons promote the proliferation and osteogenic differentiation of bone marrow mesenchymal stem cells, which provides a theoretical basis for in vitro experiments aimed at constructing tissue-engineered bone.

Key words: nerve regeneration, bone marrow mesenchymal stem cells, bone, osteoblasts, ganglion,  , spine, neurons, co-culture techniques, proliferation, differentiation, real-time quantitative PCR, NSFC grants, neural regeneration