Abstract
Bone marrow-derived mesenchymal stem cells have become an attractive cell source for periodontal ligament regeneration treatment because of their potential to engraft to several tissue types after injury. Most researchers have focused on the transplantation process, but few have paid attention to cell safety concerns and rapid proliferation before transplantation. Using serum-free medium to culture stem cells may be an effective method to avoid problems associated with exogenous serum and the addition of growth factors to promote cell proliferation. Here, we randomly divided our serum-free cultures and treated them with different levels of epidermal growth factor (EGF). We then evaluated changes in rates of cell adhesion, proliferation, apoptosis, and cell cycle ratio as well as their differentiation potential. The data showed that all of these parameters were significantly different when comparing serum-free cultures with and without 10 nM/L EGF (p < 0.05/0.01); however, cells with 10 nM/L EGF did not respond differently than cells grown in standard serum-containing media without EGF (p > 0.05). In summary, our results demonstrate that 10 nM/L EGF was the optimal dose for serum-free culture, which can replace traditional standard serum medium for in vitro expansion of miniature pig bone marrow-derived mesenchymal stem cells.
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Acknowledgments
The authors are grateful to Yan Ma and Xiaojuan Bi for guidance in stem cell culture and Shutao Zheng and Ousheng Liu for molecular biology assistance. This work was funded by Youth Fund of Natural Science Foundation of Xinjiang Uygur Autonomous Region, nos.: 2013211B58.
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The authors declare that they have no competing interests.
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Wang, X., Zheng, F., Liu, O. et al. Epidermal growth factor can optimize a serum-free culture system for bone marrow stem cell proliferation in a miniature pig model. In Vitro Cell.Dev.Biol.-Animal 49, 815–825 (2013). https://doi.org/10.1007/s11626-013-9665-6
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DOI: https://doi.org/10.1007/s11626-013-9665-6