Chinese Journal of Tissue Engineering Research ›› 2015, Vol. 19 ›› Issue (45): 7237-7241.doi: 10.3969/j.issn.2095-4344.2015.45.004

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Chondrogenic differentiation of bone marrow mesenchymal stem cells induced by different growth factors

Wang Shu-ying1, Lu Xiao-bing2, Ouyang Lin3   

  1. 1Wulanchabu Medical College, Wulanchabu 012000, Inner Mongolia Autonomous Region, China; 2Changzhou Second People’s Hospital Affiliated to Nanjing Medical University, Changzhou 213003, Jiangsu Province, China; 3Department of of Histology and Embryology, Inner Mongolia Medical University School of Basic Medicine, Hohhot 010110, Inner Mongolia Autonomous Region, China
  • Received:2015-10-06 Online:2015-11-05 Published:2015-11-05
  • About author:Wang Shu-ying, Wulanchabu Medical College, Wulanchabu 012000, Inner Mongolia Autonomous Region, China

Abstract:

BACKGROUND: Articular cartilage is a highly differentiated tissue, which is very limited in its ability to repair after injury. Stem cell therapy for cartilage repair has completely solved this problem.

OBJECTIVE: To investigate the mechanism that different growth factors induce the differentiation of bone marrow mesenchymal stem cells into chondrocytes.
METHODS: Passage 5 rat bone marrow mesenchymal stem cells were induced by different growth factors and their combinations, including transforming growth factor beta 1 (TGF-β1) group, TGF-β1+insulin growth factor-1 (IGF-1) group, and bone morphogenetic protein 2 (BMP-2)+IGF-1 group, TGF-β1+BMP-2 group, TGF-β1+IGF-1+ BMP-2 group, and blank control group. At 21 days of induction, cells were stained with alcian blue and alizarin red; RT-PCR was employed to detect collagen II mRNA expression.
RESULTS AND CONCLUSION: Alcian blue staining showed metachromasia in the cytoplasm and mesenchyma, and proteoglycan was expressed green; alizarin red staining showed no orange calcium nodules. The bone marrow mesenchymal stem cells were preliminarily deduced to differentiate into chondrocytes, but could not express the cell phenotypes of bone cells. In the blank control group, the expression of collagen II mRNA was negative. Compared with the TGF-β1 group, the mRNA expression of collagen II was lower in the BMP-2+IGF-1 group, but higher in the TGF-β1+BMP-2 group and TGF-β1+IGF-1+BMP-2 group (P < 0.05). Moreover, the expression of collagen II mRNA was highest in the TGF-β1+IGF-1+BMP-2 group (P < 0.05). These findings indicate that TGF-β1 alone is able to induce the chondrogenic differentiation of bone marrow mesenchymal stem cells, and the combination of TGF-β1, IGF-1 and BMP-2 can play the biggest role to induce the chondrogenic differentiation of bone marrow mesenchymal stem cells.
中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程

Key words: Bone Marrow, Mesenchymal Stem Cells, Chondrocytes, Transforming Growth Factor beta1, Insulin-Like Growth Factor I, Bone Morphogenetic Proteins, Tissue Engineering