title: Synthesis and characterization of chitosan/chondroitin sulfate/nano-SiO2 composite scaffold for bone tissue engineering.
abstract: Chitosan, a natural polymer, is a biomaterial which is known to be osteoconductive but lacking in mechanical strength. In this work, to further enhance the mechanical property and biocompatibility of chitosan, we combined it with both chondroitin sulfate, a natural glycosaminoglycan found in bone, and nano-SiO2. The composite scaffold of chitosan/chondroitin sulfate/nano-SiO2 was fabricated by lyophilization. The nanocomposite scaffold showed enhanced porosity, degradation, mechanical integrity, biomineralization and protein adsorption. Biocompatibility and cell attachment-proliferation studies performed using MG-63 cells, advocate its better performance in vitro. To improve the cell seeding efficiency, we coated the scaffold surface with fibrin, which enhanced the initial cell attachment. The cumulative results suggest this novel nanocomposite scaffold to be a suitable candidate for bone tissue engineering.
authors.affiliation: Amrita Centre for Nanosciences and Molecular Medicine, Amrita Institute of Medical Sciences and Research Centre, Amrita Vishwa Vidyapeetham, Cochin 682041, Kerala, India.
authors.forename: K C
authors.initials: KC
authors.lastname: Kavya
authors.forename: Rachna
authors.initials: R
authors.lastname: Dixit
authors.forename: R
authors.initials: R
authors.lastname: Jayakumar
authors.forename: Shantikumar V
authors.initials: SV
authors.lastname: Nair
authors.forename: Krishna Prasad
authors.initials: KP
authors.lastname: Chennazhi
mesh_terms: D000327:Adsorption; D001798:Blood Proteins / Q000378:metabolism; D001842:Bone and Bones / Q000502:physiology*; D002113:Calcification, Physiologic / Q000187:drug effects; D002448:Cell Adhesion / Q000187:drug effects; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects; D048271:Chitosan / Q000737:chemistry* / Q000494:pharmacology; D002809:Chondroitin Sulfates / Q000737:chemistry* / Q000494:pharmacology; D006801:Humans; D053761:Nanocomposites / Q000737:chemistry*; D016062:Porosity; D012822:Silicon Dioxide / Q000737:chemistry* / Q000494:pharmacology; D023822:Tissue Engineering / Q000379:methods*; D054457:Tissue Scaffolds / Q000737:chemistry*
chemical_list: D001798:Blood Proteins; D012822:Silicon Dioxide; D002809:Chondroitin Sulfates; D048271:Chitosan