Abstract
Growth factors that regulate proliferation, migration, and invasion of ovine mesenchymal stem cells (oMSCs) are not well defined. In this study, we have evaluated five growth factors for their ability to initiate and support in vitro proliferation, migration, and invasion of oMSCs. oMSCs were exposed to different doses and combinations of the growth factors: basic fibroblast growth factor (bFGF), transforming growth factor-β (TGF-β), epidermal growth factor (EGF), insulin growth factor-I (IGF-I), connective tissue growth factor, and platelet-derived growth factor-AB (PDGF-AB). Cellular proliferation, motility, and invasiveness were assayed. The most proliferative stimulating growth factors are PDGF-AB+TGF-β and PDGF-AB+IGF-I. Combinations EGF+bFGF and EGF+bFGF+PDGF-AB demonstrated the greatest ability to stimulate migration. Moreover, the triple cocktail EGF+bFGF+TGF-β has the most significant effect on invasion. Different growth factor cocktails are required to enhance proliferation, migration, and invasion. These results may be useful for the development of a tissue-engineered heart valve by stimulating cellular repopulation.
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