Microcapsules based on alginate-keratin, alginate dialdehyde (ADA)-keratin and ADA-keratin-45S5 bioactive glass (BG) were successfully prepared. The samples were characterized by light microscopy, scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). The results showed that ADA-based materials possess higher degradation rate compared to alginate–based materials. The incorporation of BG particles (mean particle size: 2.0 µm) improved the bioactivity of the materials. Moreover, the biological properties of the samples were evaluated by encapsulating MG-63 osteosarcoma cells into the microcapsules. The cell viability in all samples increased during 21 days of cultivation. However, the presence of 0.5% BG particle seemed to have initial negative effect on cell growth compared to other samples without BG. On the other hand, the positive effect of CaP formation was visible after 3 weeks in the BG containing samples. The results are relevant to consider the development of cell laden bioinks incorporating inorganic bioactive particles for biofabrication approaches.
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Supachai Reakasame acknowledges the German Academic Exchange Service (DAAD) for financial support. We thank Dr.-Ing. Kai Zheng and Dr. Aldo Leal-Egaña (Institute of Biomaterials, University of Erlangen-Nuremberg) for helpful discussions.
Conflict of interest
The authors declare that they have no conflict of interest.
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Reakasame, S., Trapani, D., Detsch, R. et al. Cell laden alginate-keratin based composite microcapsules containing bioactive glass for tissue engineering applications. J Mater Sci: Mater Med 29, 185 (2018). https://doi.org/10.1007/s10856-018-6195-5