In Situ Hydroxyapatite Content Affects the Cell Differentiation on Porous Chitosan/Hydroxyapatite Scaffolds.
Highly porous chitosan/hydroxyapatite composite structures with different weight ratios (100/0; 90/10; 80/20; 70/30; 60/40; 50/50; 40/60) have been prepared by precipitation method and freeze-gelation technique using calcite, urea phosphate and chitosan as starting materials. The composition of prepared composite scaffolds was characterized by X-ray diffraction analysis and Fourier transformed infrared spectroscopy, while morphology of scaffolds was imaged by scanning electron microscopy. Mercury intrusion porosimetry measurements of prepared scaffolds have shown different porosity and microstructure regarding to the HA content, along with SEM observations of scaffolds after being immersed in physiological medium. The results of swelling capacity and compressive strength measured in Dulbecco's phosphate buffer saline (DPBS) have shown higher values for composite scaffolds with lower in situ HA content. Viability, proliferation and differentiation of MC3T3-E1 cells seeded on different scaffolds have been evaluated by live dead assay and confocal scan microscopy. Our results suggest that the increase of HA content enhance osteoblast differentiation confirming osteogenic properties of highly porous CS/HA scaffolds for tissue engineering applications in bone repair.
Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev trg 19, p.p.177, 10001, Zagreb, Croatia. arogina@fkit.hr.
Anamarija
A
Rogina
Center for Biomaterials and Tissue Engineering (CBIT), Universitat Politècnica de València, Camino de Vera s/n, 46022, Valencia, Spain.|Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Zaragoza, Spain.
Patricia
P
Rico
Center for Biomaterials and Tissue Engineering (CBIT), Universitat Politècnica de València, Camino de Vera s/n, 46022, Valencia, Spain.|Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Zaragoza, Spain.
Gloria
G
Gallego Ferrer
Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev trg 19, p.p.177, 10001, Zagreb, Croatia.
Marica
M
Ivanković
Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev trg 19, p.p.177, 10001, Zagreb, Croatia.
Hrvoje
H
Ivanković
D000818:Animals; D002452:Cell Count; D002454:Cell Differentiation; D002460:Cell Line; D002470:Cell Survival; D048271:Chitosan / Q000737:chemistry*; D050659:Core Binding Factor Alpha 1 Subunit / Q000378:metabolism; D017886:Durapatite / Q000737:chemistry*; D058574:Integrin-Binding Sialoprotein / Q000378:metabolism; D051379:Mice; D010006:Osteoblasts / Q000166:cytology* / Q000378:metabolism; D053495:Osteopontin / Q000378:metabolism; D016062:Porosity; D017550:Spectroscopy, Fourier Transform Infrared; D054457:Tissue Scaffolds; D014961:X-Ray Diffraction
D050659:Core Binding Factor Alpha 1 Subunit; C546872:Ibsp protein, mouse; D058574:Integrin-Binding Sialoprotein; C493716:Runx2 protein, mouse; C506896:Spp1 protein, mouse; D053495:Osteopontin; D048271:Chitosan; D017886:Durapatite
Chitosan; Hydroxyapatite; MC3T3-E1 differentiation; Osteogenic markers; Porosity; Scaffold; Unconfined compression