中国组织工程研究

• 脂肪干细胞 adipose-derived stem cells • 上一篇    下一篇

联合诱导兔脂肪源性基质细胞的成肌潜能

刘  静1,林婉君1,刘印忠2,李晓眠2,郭洪刚3   

  1. 1天津市中心妇产科医院普妇科,天津市  300100;2天津医科大学基础学院,天津市  300072;3天津医科大学总医院骨科,天津市  300052
  • 收稿日期:2012-08-29 修回日期:2012-10-08 出版日期:2013-07-02 发布日期:2013-07-02
  • 作者简介:刘静☆,女,1969年生,河北省承德市人,满族,2006年天津医科大学妇科学毕业,博士,副主任医师,主要从事妇科盆底疾患、干细胞移植与组织工程学研究。 jeanjingliu@yahoo.com.cn
  • 基金资助:

    天津市卫生局科技基金资助项目(2011KZ68)。

Myogenetic potential of rabbit adipose-derived stromal cells

Liu Jing1, Lin Wan-jun1, Liu Yin-Zhong2, Li Xiao-mian2, Guo Hong-gang3   

  1. 1Department of General Gynecology, Tianjin Central Hospital of Obstetrics and Gynecology, Tianjin  300100, China; 2College of Basic Medicine, Tianjin Medical University, Tianjin  300072, China; 3Department of Orthopedics, General Hospital of Tianjin Medical University, Tianjin  300052, China
  • Received:2012-08-29 Revised:2012-10-08 Online:2013-07-02 Published:2013-07-02
  • About author:Liu Jing☆, M.D., Associate chief physician, Department of General Gynecology, Tianjin Central Hospital of Obstetrics and Gynecology, Tianjin 300100, China jeanjingliu@yahoo.com.cn
  • Supported by:

    the Technology Fund of Tianjin Health Bureau No. 2011KZ68*

摘要:

背景:成肌种子细胞是构建工程化成肌复合物的基础,如何优化其扩增是过渡到临床应用的核心。
目的:分析将MyoD、转化生长因子β1及5-氮杂胞苷不同模式下联合诱导兔脂肪源性基质细胞体外成肌潜能的变化。
方法:取兔腹部脂肪,采用胶原酶消化法分离获取脂肪源性基质细胞,分别以不同方式进行成肌细胞诱导:5-氮杂胞苷诱导组;MyoD+转化生长因子β1诱导;5-氮杂胞苷+ MyoD+转化生长因子β1联合诱导组;并设空白对照。于诱导第1,4,8,12,16,20,24,28天观察细胞形态学特点,行MTT比色法、流式细胞仪和免疫组织化学检测鉴定细胞,检测Ⅲ型胶原含量。
结果与结论:联合诱导组与其他组相比,细胞生长迅速,16 d增殖达高峰,20 d肌管数量增多,体积增大,排列规则,呈结蛋白强阳性表达,细胞周期显示联合诱导组脂肪源性基质细胞的DNA复制期细胞比例增加,间隙期细胞减少,Ⅲ型胶原含量明显增高,差异有显著性意义。结果提示,多因子联合5-氮杂胞苷模式能有效促进脂肪源性基质细胞向成肌细胞定向分化,细胞增殖显著,是成肌细胞体外诱导的理想方法。

关键词: 干细胞, 脂肪干细胞, 脂肪源性基质细胞, 转化生长因子β1, 成肌分化因子, 5-氮杂胞苷, Ⅲ型胶原, 诱导成肌, 成肌细胞, 细胞培养, 结蛋白, 省级基金, 干细胞图片文章

Abstract:

BACKGROUND: Myogenetic seed cells are the fundamental for construction of tissue-engineered smooth muscle, and optimizing the amplification of seed cells is the key in further clinical application.
OBJECTIVE: To analyze the myogenetic potential of rabbit adipose-derived stromal cells induced with the combination of MyoD, transforming growth factor β1 and 5-azacytidine, and to investigate a new way to induce cells.
METHODS: The rabbit abdominal fats were isolated and then the adipose-derived stromal cells were separated by collagenase digestion method for myogenetic induction with different methods: 5-azacytidine induction group, MyoD+transforming growth factor β1 induction group, 5-azacytidine+MyoD+transforming growth factor β1 combination induction group. The blank control group was set. The morphological characteristics of cells were observed at 1, 4, 8, 12, 16, 20, 24 and 28 days after induction, and the collagen type Ⅲ level were detected with 4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay, flow cytometry and immunohistochemistry.
RESULTS AND CONCLUSION: Compared with the other groups, the cell activity was higher in the combination induction group and reached peak at 16 days after induction, the number and volume of myotubes were increased at 20 days with regular arrangement, and desmin showed strong expression. Cell cycle showed the ratio of adipose-derived stromal cells in the DNA replication phase was increased in the combination induction group, the ratio of cells in the clearance period was decreased; the level of collagen type Ⅲ was increased significantly, and the difference was significant. The results indicate that 5-azacytidine combined with multiple factors can promote the differentiation of adipose-derived stromal cells into myoblasts with significant cell proliferation, which is considered as the ideal method to in vitro induction of myoblasts.

Key words: stem cells, adipose-derived stem cells, adipose-derived stromal cells, transforming growth factor β1, myogenetic differentiation factor, 5-azacytidine, collagen type Ⅲ, myoblastic induction, myoblasts, cell culture, desmin, provincial grants-supported paper, stem cell photographs-containing paper

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