Sohrabi, M.; Yekta, B.E.; Rezaie, H.; Naimi-Jamal, M.R.; Kumar, A.; Cochis, A.; Miola, M.; Rimondini, L. Enhancing Mechanical Properties and Biological Performances of Injectable Bioactive Glass by Gelatin and Chitosan for Bone Small Defect Repair. Biomedicines2020, 8, 616.
Sohrabi, M.; Yekta, B.E.; Rezaie, H.; Naimi-Jamal, M.R.; Kumar, A.; Cochis, A.; Miola, M.; Rimondini, L. Enhancing Mechanical Properties and Biological Performances of Injectable Bioactive Glass by Gelatin and Chitosan for Bone Small Defect Repair. Biomedicines 2020, 8, 616.
Sohrabi, M.; Yekta, B.E.; Rezaie, H.; Naimi-Jamal, M.R.; Kumar, A.; Cochis, A.; Miola, M.; Rimondini, L. Enhancing Mechanical Properties and Biological Performances of Injectable Bioactive Glass by Gelatin and Chitosan for Bone Small Defect Repair. Biomedicines2020, 8, 616.
Sohrabi, M.; Yekta, B.E.; Rezaie, H.; Naimi-Jamal, M.R.; Kumar, A.; Cochis, A.; Miola, M.; Rimondini, L. Enhancing Mechanical Properties and Biological Performances of Injectable Bioactive Glass by Gelatin and Chitosan for Bone Small Defect Repair. Biomedicines 2020, 8, 616.
Abstract
Bioactive glass (BG) represents a promising biomaterial for bone healing; here injectable BG pastes biological properties were improved by 25 wt% gelatin or chitosan, as well as mechanical resistance was enhanced by adding 10 or 20 wt% 3-Glycidyloxypropyl trimethoxysilane (GPTMS) cross-linker. Composites exhibited bioactivity as apatite formation was observed by SEM and XRD after 14 days immersion in SBF; moreover, polymers did not enhance degradability as weight loss was >10% after 30 days in physiological conditions. BG-gelatin-20 wt% GPTMS composites demonstrated the highest compressive strength (4.8±0.5 MPa) in comparison with 100% BG control (1.9±0.1 MPa). Cytocompatibility was demonstrated towards human mesenchymal stem cells (hMSC), osteoblasts progenitors and endothelial cells. The presence of 20 wt% GPTMS conferred antibacterial properties thus inhibiting the joint pathogens Staphylococcus aureus and Staphylococcus epidermidis infection. Finally, hMSC osteogenesis was successfully supported in a 3D model as demonstrated by alkaline phosphatase release and osteogenic genes expression.
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