中国组织工程研究 ›› 2013, Vol. 17 ›› Issue (19): 3421-3429.doi: 10.3969/j.issn.2095-4344.2013.19.001

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

胰岛素样生长因子1对骨髓间充质干细胞软骨分化及基质金属蛋白酶表达的影响

邬 波,马 旭,朱大木,刘素媛,王景续,张 毅,付爱民,潘 梁   

  1. 沈阳市骨科医院关节外科,辽宁省沈阳市  110044
  • 收稿日期:2012-12-07 修回日期:2013-03-06 出版日期:2013-05-07 发布日期:2013-05-07
  • 通讯作者: 邬波★,男,1962年生,汉族,吉林省大安市人,2002年中国医科大学毕业,硕士,主任医师,博士生导师,主要从事创伤骨科、脊柱与关节外科研究。 wabc967@126.com
  • 作者简介:邬波★,男,1962年生,汉族,吉林省大安市人,2002年中国医科大学毕业,硕士,主任医师,博士生导师,主要从事创伤骨科、脊柱与关节外科研究。 wabc967@126.com
  • 基金资助:

    课题受沈阳市科技计划资助项目(F11-262-9-30)资助

Effect of insulin-like growth factor-1 on chondrogenic differentiation of bone marrow mesenchymal stem cells and expression of matrix metalloproteinase

Wu Bo, Ma Xu, Zhu Da-mu, Liu Su-yuan, Wang Jing-xu, Zhang Yi, Fu Ai-min, Pan Liang   

  1. Department of Joint Surgery, Orthopaedic Hospital of Shenyang, Shenyang 110044, Liaoning Province, China
  • Received:2012-12-07 Revised:2013-03-06 Online:2013-05-07 Published:2013-05-07
  • Contact: Wu Bo, Master, Chief physician, Doctoral supervisor, Department of Joint Surgery, Orthopaedic Hospital of Shenyang, Shenyang 110044, Liaoning Province, China wabc967@126.com
  • About author:Wu Bo★, Master, Chief physician, Doctoral supervisor, Department of Joint Surgery, Orthopaedic Hospital of Shenyang, Shenyang 110044, Liaoning Province, China
  • Supported by:

    Science and Technology Projects of Shenyang City, No. F11-262-9-30*

摘要:

背景:以往促进骨髓间充质干细胞软骨分化的研究,多将胰岛素样生长因子1作为辅助因子与其他细胞因子联合应用,而胰岛素样生长因子1单独应用能否促进骨髓间充质干细胞分泌软骨特异性胶原仍存在争议,其对骨髓间充质干细胞软骨分化及软骨胶原纤维稳定性的影响尚不清楚。
目的:观察胰岛素样生长因子1对骨髓间充质干细胞软骨分化以及基质金属蛋白酶表达的影响。
方法:构建含有胰岛素样生长因子1基因完整编码区的表达载体,稳定转染至大鼠骨髓间充质干细胞,设为胰岛素样生长因子1稳定转染组,同时设未转染组作对照。
结果与结论:MTT检测结果显示,实验成功筛选得到胰岛素样生长因子1稳定过表达的骨髓间充质干细胞,转染后4 d,细胞增殖能力显著增强(P < 0.05)。RT-PCR,Western blot法及免疫细胞化学检测结果显示,与未转染组相比,胰岛素样生长因子1稳定转染组细胞胰岛素样生长因子1,Ⅱ型胶原 mRNA和蛋白的表达水平均显著升高(P < 0.01),基质金属蛋白酶1,2,3 mRNA表达显著降低(P < 0.01)。结果证实,单独应用胰岛素样生长因子1能够有效促进骨髓间充质干细胞的增殖以及软骨分化,并维持软骨胶原纤维的稳定性。

关键词: 干细胞, 骨髓干细胞, 胰岛素样生长因子1, 骨髓间充质干细胞, 载体构建, 细胞增殖, 软骨分化, Ⅱ型胶原, 基质金属蛋白酶, 组织工程软骨, 其他基金, 干细胞图片文章

Abstract:

BACKGROUND: Studies have shown that insulin-like growth factor-1 serves as a helper factor and is combined combines with other factors to promote the differentiation of bone marrow mesenchymal stem
cells into chondrocytes. However, whether insulin-like growth factor-1 alone could promote the secretion of cartilage specific collagen remains controversial, and its effect on cell proliferation and stability of cartilage collagenfiber has been rarely reported.
OBJECTIVE: To investigate the effect of insulin-like growth factor-1 on chondrogenic differentiation and matrix metalloproteinase expression of bone marrow mesenchymal stem cells.
METHODS: The expression vector carrying complete coding sequence of insulin-like growth factor-1 was constructed, and stably transfected to rat bone marrow mesenchymal stem cells, serving as insulin-like growth factor-1 stable transfection group. Meanwhile, the non-transfection group was taken as the control.
RESULTS AND CONCLUSION: The 3-(4,5)-dimethylthiahiazo-2-yl-3,5-di-phenytetrazoliumromide assay showed that, insulin-like growth factor-1 stable expressing bone marrow mesenchymal stem cells was successfully established, and cell proliferation was significantly increased after 4 days of transfection (P < 0.05). Reverse transcription-polymerase chain reaction, western blot analysis and immunocytochemistry detection showed that, the mRNA and protein levels of insulin-like growth factor-1 and collagen type Ⅱ were significantly increased in the stable transfection group (P < 0.01), while mRNA levels of matrix metalloproteinase-1, -2 and -3 were significantly decreased compared with the non-transfection group (P < 0.01). Experimental findings confirm that, insulin-like growth factor-1 alone can promote the proliferation of bone marrow mesenchymal stem cells as well as chondrogenic differentiation, and maintain the stability of collagen fibers.

Key words: stem cells, bone marrow-derived stem cells, insulin-like growth factor-1, bone marrow mesenchymal stem cells, vector construction, cell proliferation, chondrogenic differentiation, collagen type Ⅱ, matrix metalloproteinase, tissue-engineered cartilage, other grants-supported paper, stem cell photographs-containing paper

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