中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (2): 191-196.doi: 10.3969/j.issn.2095-4344.2016.02.007

• 软骨组织构建 cartilage tissue construction • 上一篇    下一篇

体外静水压环境下细胞因子诱导骨髓间充质干细胞向髓核样细胞分化

陈 江1,贾育松1,柳根哲2,孙 旗1,白文博1,王 利1   

  1. 1北京中医药大学东直门医院骨伤一科,北京市 100700;2首都医科大学附属北京中医医院骨科,北京市 100010
  • 收稿日期:2015-11-05 出版日期:2016-01-08 发布日期:2016-01-08
  • 通讯作者: 贾育松,博士,主任医师,硕士生导师,北京中医药大学东直门医院骨伤一科,北京市 100700
  • 作者简介:陈江,男,1983年生,湖北省宜昌市人,汉族,2011年北京中医药大学毕业,博士,主治医师,主要从事脊柱退行性疾病研究。
  • 基金资助:
    北京市自然科学基金资助项目(7142076);2015年度北京中医药大学基本科研业务费项目(中青年教师类,2015-JYB-JSMS084)

Cytokine-induced differentiation of bone marrow mesenchymal stem cells into nucleus pulposus-like cells under hydrostatic pressure in vitro

Chen Jiang1, Jia Yu-song1, Liu Gen-zhe2, Sun Qi1, Bai Wen-bo1, Wang Li1   

  1. 1First Department of Orthopaedics, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing 100700, China; 2Department of Orthopaedics, Beijing Hospital of Traditional Chinese Medicine, Capital Medical University, Beijing 100010, China
  • Received:2015-11-05 Online:2016-01-08 Published:2016-01-08
  • Contact: Jia Yu-song, M.D., Chief physician, Master’s supervisor, First Department of Orthopaedics, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing 100700, China
  • About author:Chen Jiang, M.D., Attending physician, First Department of Orthopaedics, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing 100700, China
  • Supported by:

     Beijing Municipal Natural Science Foundation, No. 7142076; 2015 Fundamental Research Fund of Beijing University of Chinese Medicine (Middle and Young Teachers), No. 2015-JYB-JSMS084

摘要:

文章快速阅读:

文题释义:

静水压:是指液体所产生的压强,生理学上的静水压就是机体某部位积聚的液体对其周围组织产生的压强。静水压是椎间盘髓核组织在人体直立、弯腰、负重等日常活动中承受载荷的主要力学形式,当椎间盘承受外负荷时,髓核静水压升高,向各方向均匀作用,使纤维环承受张应力。静水压对椎间盘髓核细胞的生长代谢及基因表达具有重要的调节作用,异常压力将导致椎间盘生物力学性能改变及其细胞代谢紊乱。

髓核样细胞:又称类髓核细胞,主要指具有类似髓核细胞功能表达的细胞。椎间盘的髓核细胞为类软骨细胞,但其本身不具备软骨细胞表面特异性的分子标记物,目前尚无公认的鉴定髓核细胞的分子标记物之金标准,试验中常根据髓核细胞分泌Ⅱ型胶原、蛋白多糖为主的表型特点来进行鉴定。在体外特定的条件下,干细胞被诱导分化成为具有类似髓核细胞功能表达的细胞,称之为“髓核样细胞”

 

背景:骨髓间充质干细胞的诱导分化受到综合因素的共同作用,体外通过一定的细胞力学刺激结合细胞因子复合体共同作用,以期进一步提高干细胞髓核样细胞分化的效率。

目的:观察在体外静水压环境下转化生长因子β1联合类胰岛素生长因子 1诱导骨髓间充质干细胞向髓核样细胞表型分化的效果。

方法:取成年大鼠骨髓间充质干细胞,体外培养、分离及纯化,传代至第3代后分为:静压药物组在体外静水压加载系统中运用转化生长因子β1联合类胰岛素生长因子1诱导骨髓间充质干细胞分化;单纯药物组在体外常压环境下使用转化生长因子β1联合类胰岛素生长因子1诱导干细胞分化;空白对照组将骨髓间充质干细胞置于体外常压环境下普通培养基中培养。

结果与结论:培养14 d时,静压药物组可见多角形的髓核样细胞,单纯药物组细胞呈不规则形,空白对照组细胞变化不明显。静压药物组细胞中Ⅱ型胶原蛋白及DNA含量高于其他2组。说明在静水压环境下转化生长因子β1联合类胰岛素生长因子1可成功诱导骨髓间充质干细胞向髓核样细胞分化,且诱导效率高于常压。 

ORCID: 0000-0002-3203-5182(贾育松)

关键词: 组织构建, 组织工程, 转化生长因子β1, 类胰岛素生长因子1, 骨髓间充质干细胞, 静水压, 髓核样细胞, 诱导分化, 体外实验, 北京市自然科学基金

Abstract:

BACKGROUND: Differentiation of bone marrow mesenchymal stem cells is induced by integrated factors. In vitro interaction of cytokine complex and certain cell mechanical stimulation is carried out to further improve the efficiency of bone marrow mesenchymal stem cells differentiating into nucleus pulposus-like cells.
OBJECTIVE: To investigate the differentiation of bone marrow mesenchymal stem cells into nucleus pulposus-like cells induced by transforming growth factor-β1 and insulin-like growth factor-1 under hydrostatic pressure.
METHODS: Bone marrow mesenchymal stem cells from adult rats were separated, cultured and purified in vitro. Passage 3 cells were induced in vitro with transforming growth factor-β1 and insulin-like growth factor-1 under hydrostatic pressure (hydrostatic pressure group), with transforming growth factor-β1 and insulin-like growth factor-1 under normal pressure (drug group), or with normal culture medium under normal pressure (blank control group).
RESULTS AND CONCLUSION: At day 14 after culture, polygonal nucleus pulposus-like cells were observed in the hydrostatic pressure group, but irregular cells in the drug group. There was no obvious change in the blank control group. Levels of collagen type II and DNA were higher in the hydrostatic pressure group than the other two groups. These findings indicate that the combination of transforming growth factor-β1 and insulin-like growth factor-1 can successfully induce the differentiation of bone marrow mesenchymal stem cells into nucleus pulposus-like cells under hydrostatic pressure, and the differentiation efficiency is higher under hydrostatic pressure than under normal pressure.