Proliferation and differentiation of osteoblast-like MC3T3-E1 cells on biomimetically and electrolytically deposited calcium phosphate coatings
Biomimetic and electrolytic deposition are versatile methods to prepare calcium phosphate coatings. In this article, we compared the effects of biomimetically deposited octacalcium phosphate and carbonate apatite coatings as well as electrolytically deposited carbonate apatite coating on the proliferation and differentiation of mouse osteoblast-like MC3T3-E1 cells. It was found that MC3T3-E1 cells cultured on the biomimetically deposited carbonate apatite coating demonstrated the greatest proliferation rate and the highest differentiation potential. Cells on the biomimetically deposited octacalcium phosphate coating had lower proliferation rate before day 7, but higher after that, than those on the electrolytically deposited carbonate apatite coating. There was no difference on the expression of early differentiation markers, that is, alkaline phosphatase activity and collagen content, between biomimetically deposited octacalcium phosphate and electrolytically deposited carbonate apatite coatings. However, higher expression of late differentiation markers, that is, osteocalcin and bone sialoprotein mRNA, was found on the biomimetically deposited octacalcium phosphate coating on day 14. These results suggest that the difference in in vitro osteoblast cell performance of calcium phosphate coatings might relate to their physicochemical properties. Biomimetic carbonate apatite coating is the most favorable surface for the proliferation and differentiation of MC3T3-E1 cells.
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