Abstract
In order to induce the chondrogenesis of mesenchymal stem cells (MSCs) in tissue engineering, a variety of growth factors have been adapted and encouraging results have been demonstrated. In this study, we developed a delivery system for dual growth factors using a gelation rate controllable alginate solution (containing BMP-7) and polyion complex nanoparticles (containing TGF-β2) to be applied for the chondrogenesis of MSCs. The dual growth factors (BMP-7/TGF-β2)-loaded nanoparticle/hydrogel system showed a controlled release of both growth factors: a faster release of BMP-7 and a slower release of TGF-β2, ca., approximately 80 and 30% release at the end of an incubation period (21 days), respectively, which may be highly desirable for chondrogenic differentiation of MSCs. On the contrary, the release of each growth factor from the dual growth factors-loaded hydrogel (without the nanoparticles) was much slower than that of the nanoparticle/hydrogel system, approximately 36% (BMP-7) and 16% (TGF-β2) for 21 days, and this is more than likely attributed to the aggregation between growth factors during the hydrogel fabrication step. The nanoparticle/hydrogel system with separate growth factor loading may provide desirable growth factor delivery kinetics for cartilage regeneration, as well as the chondrogenesis of MSCs.
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Acknowledgements
This work was supported by grants from the Korea Science & Engineering Foundation (Grant No. R01-2006-000-10432-0) and the Pioneer Research Center Program through the National Research Foundation of Korea funded by the Ministry of Education, Science and Technology (2010-0002176).
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Lim, S.M., Oh, S.H., Lee, H.H. et al. Dual growth factor-releasing nanoparticle/hydrogel system for cartilage tissue engineering. J Mater Sci: Mater Med 21, 2593–2600 (2010). https://doi.org/10.1007/s10856-010-4118-1
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DOI: https://doi.org/10.1007/s10856-010-4118-1