Abstract
Purpose
The aim of this study was to compare bone marrow-derived mesenchymal stem cells (MSCs) with bone marrow nucleated cells (BNCs) as seed cells in the treatment of cartilage defects.
Methods
Twenty Guizhou minipigs were used to create full-thickness chondral defects of 6.0 mm in diameter in the knee joints and divided between two time points (four and eight weeks) for final assessment. At every time point, animals were separated into four groups: the CON group which underwent no implantation; the collagen type II hydrogel group (COL); the collagen type II hydrogel + bone marrow-derived MSCs group; and the collagen type II hydrogel + BNCs group. The samples were grossly examined, observed through a stereo microscope, histologically analysed and evaluated with the O’Driscoll scoring system, respectively.
Results
The cartilage repair of the two cell-treated groups was improved markedly compared to the CON and the COL groups, while the repair tissues of the two cell-treated groups showed no significant difference eight weeks after surgery.
Conclusions
These data indicate that BNCs contribute to the repair of cartilage with collagen type II hydrogel as scaffolds, which have comparable results with bone marrow-derived MSCs. Moreover, the transplantation of autologous BNCs as seed cells may be a more economical and convenient technique for cartilage repair in clinical applications.
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Acknowledgments
We thank Professor Yujiang Fan for his provision of collagen type II hydrogel and Li Yin M.D. for statistical analysis. This work was supported by National Natural Science Foundation of China (No. 30870639), Clinical project of National 863 program (No. 2006AA02A125) and the Key Project of Medical Science in the Military “11th 5-year Plan”, China (06 G079).
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The authors declare that they have no conflict of interest.
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Zhang, Y., Wang, F., Chen, J. et al. Bone marrow-derived mesenchymal stem cells versus bone marrow nucleated cells in the treatment of chondral defects. International Orthopaedics (SICOT) 36, 1079–1086 (2012). https://doi.org/10.1007/s00264-011-1362-z
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DOI: https://doi.org/10.1007/s00264-011-1362-z