Chinese Journal of Tissue Engineering Research ›› 2013, Vol. 17 ›› Issue (19): 3421-3429.doi: 10.3969/j.issn.2095-4344.2013.19.001

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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*

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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