Biosynthesis and in vitro evaluation of macroporous mineralized bacterial nanocellulose scaffolds for bone tissue engineering

Article type: Research Article

Authors: Sundberg, Johan | Götherström, Cecilia | Gatenholm, Paul^;

Affiliations: Department of Chemical and Biological Engineering, Biopolymer Technology, Chalmers University of Technology, Göteborg, Sweden | Division of Obstetrics and Gynecology, Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden

Note: [] Address for correspondence: Paul Gatenholm, Arvid Wallgrens Backe 20, lvl 4 SE-413 46 Göteborg, Sweden. Tel.: +46 31 772 3407; Fax: +46 31 772 3407; E-mail: [email protected]

Abstract: Macroporous bacterial nanocellulose (BNC) scaffolds with calcium phosphate coated surfaces is a candidate for future bone tissue engineering applications. The mineralization of the macroporous BNC scaffolds was achieved by a biomimetic process, resulting in an environment resembling native bone tissues' mineralized extra cellular matrix both topographically and chemically. The deposited crystals were analyzed with electron spectroscopy for chemical analysis (ESCA), energy-dispersive X-ray spectroscopy (EDX) and X-ray crystallography (XRD). MSCs were cultured in osteogeneic medium for 21 days on the scaffolds. The results of this study show that macroporous BNC can be mineralized with hydroxyapatite and that MSCs retain their ability to proliferate and differentiate towards an osteoblastic phenotype within the mineralized BNC, showing the promise of this material in bone tissue engineering applications.

Keywords: Bone tissue engineering, bacterial nanocellulose, hydroxyapatite, multipotent mesenchymal stromal cells

DOI: 10.3233/BME-141245

Journal: Bio-Medical Materials and Engineering, vol. 25, no. 1, pp. 39-52, 2015