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Preparation of in situ hardening composite microcarriers: Calcium phosphate cement combined with alginate for bone regeneration

Park, J-H; Lee, E-J; Knowles, JC; Kim, H-W; (2014) Preparation of in situ hardening composite microcarriers: Calcium phosphate cement combined with alginate for bone regeneration. Journal of Biomaterials Applications , 28 (7) 1079 - 1084. 10.1177/0885328213496486. Green open access

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Abstract

Novel microcarriers consisting of calcium phosphate cement and alginate were prepared for use as three-dimensional scaffolds for the culture and expansion of cells that are effective for bone tissue engineering. The calcium phosphate cement-alginate composite microcarriers were produced by an emulsification of the composite aqueous solutions mixed at varying ratios (calcium phosphate cement powder/alginate solution = 0.8–1.2) in an oil bath and the subsequent in situ hardening of the compositions during spherodization. Moreover, a porous structure could be easily created in the solid microcarriers by soaking the produced microcarriers in water and a subsequent freeze-drying process. Bone mineral-like apatite nanocrystallites were shown to rapidly develop on the calcium phosphate cement–alginate microcarriers under moist conditions due to the conversion of the α-tricalcium phosphate phase in the calcium phosphate cement into a carbonate–hydroxyapatite. Osteoblastic cells cultured on the microspherical scaffolds were proven to be viable, with an active proliferative potential during 14 days of culture, and their osteogenic differentiation was confirmed by the determination of alkaline phosphatase activity. The in situ hardening calcium phosphate cement–alginate microcarriers developed herein may be used as potential three-dimensional scaffolds for cell delivery and tissue engineering of bone.

Type: Article
Title: Preparation of in situ hardening composite microcarriers: Calcium phosphate cement combined with alginate for bone regeneration
Open access status: An open access version is available from UCL Discovery
DOI: 10.1177/0885328213496486
Publisher version: http://dx.doi.org/10.1177/0885328213496486
Language: English
Additional information: This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 3.0 License (http://www.creativecommons.org/licenses/by-nc/3.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access page(http://www.uk.sagepub.com/aboutus/openaccess.htm).
Keywords: Microcarriers, calcium phosphate cements, alginate, cell culture, bone regeneration
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Eastman Dental Institute
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Eastman Dental Institute > Biomaterials and Tissue Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1424271
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