Effect of a novel recombinant protein of fibronectinIII7-10/cadherin 11 EC1-2 on osteoblastic adhesion and differentiation
Abstract
The limitations of specific adhesion and osteoblastic differentiation are current problems in bone tissue engineering. The aim of this study was to investigate the effect of a novel recombinant protein of fibronectin module III7-10/cadherin 11 EC1-2 (rFN/CDH) on cell adhesion and differentiation. Gene coding rFN/CDH was engineered by a homology modeling strategy, and an expression plasmid was constructed by standard DNA techniques. The rFN/CDH protein was expressed in Rosetta-gami (DE3), an improved Escherichia coli system. MC3T3-E1 cell centrifugal adhesive assay indicated that the adhesive capacity of rFN/CDH was significantly improved. Quantitative analysis of two osteogenic markers, osteocalcin mRNA expression and alkaline phosphatase activity, indicated that they were further up-regulated when human mesenchymal stem cells were cultured for 7-10 d on rFN/CDH pre-coated surfaces. These results suggest that rFN/CDH possesses an enhanced dual biofunctionality in osteoblastic adhesion and differentiation, and a promising application can be expected in biomimetic strategies and biomaterial development.
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