alexa In vivo Effects of Bioactive Glass S53P4 or Beta Tricalcium Phosphate on Osteogenic Differentiation of Human Adipose Stem Cells after Incubation with BMP-2 | Abstract
ISSN: 2157-7633

Journal of Stem Cell Research & Therapy
Open Access

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Research Article

In vivo Effects of Bioactive Glass S53P4 or Beta Tricalcium Phosphate on Osteogenic Differentiation of Human Adipose Stem Cells after Incubation with BMP-2

Martin Waselau1,2*, Mimmi Patrikoski2,3,4, Bettina Mannerström2,3,4, Mari Raki5, Kim Bergström5, Brigitte von Rechenberg6 and Susanna Miettinen2,3,4

1Faculty of Veterinary Medicine, Department of Equine and Small Animal Medicine, University of Helsinki, Finland

2Adult stem cell group, Institute of Biomedical Technology, University of Tampere, Finland

3BioMediTech, Tampere, Finland

4Science Center, Tampere University Hospital, Tampere, Finland

5Centre for Drug Research, Faculty of Pharmacy, University of Helsinki, Finland

6Musculoskeletal Research Unit, Competence Center for Applied Biotechnology and Molecular Medicine, Equine Hospital, Vetsuisse Faculty, University Zürich, Switzerland

*Corresponding Author:
Martin Waselau
Faculty of Veterinary Medicine
Department of Equine and Small Animal Medicine
University of Helsinki, Finland
Tel: + 358401901799
Fax: + 358335518498
E-mail: [email protected]

Received date July 11, 2012; Accepted date August 09, 2012; Published date August 11, 2012

Citation: Waselau M, Patrikoski M, Mannerström B, Raki M, Bergström K, et al.(2012) In vivo Effects of Bioactive Glass S53P4 or Beta Tricalcium Phosphate on Osteogenic Differentiation of Human Adipose Stem Cells after Incubation with BMP-2. J Stem Cell Res Ther 2:125. doi:10.4172/2157-7633.1000125

Copyright: © 2012 Waselau M, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


Aims: Human adipose stem cells (hASCs) have been suggested as viable alternative for bone tissue engineering. However, the tissue response and osteogenic potential of BAG S53P4 or β-TCP granules has not been studied in vivo when seeded with hASCs and/or co-incubated with BMP-2 and thus, was evaluated in the current study.
Methods and results: Human ASCs were isolated, expanded and seeded on BAG and β-TCP in vitro and, cell viability was assessed using Live/Dead staining. In a subcutaneous rodent implantation model, the cellular response and osteogenic potential of 1) plain, 2) hASC seeded, 3) BMP-2 co-incubated and 4) hASC seeded and BMP-2 co-incubated BAG and β-TCP granules were investigated using computed tomography and semi-quantitative histologic scores after 4 and 8 weeks. Live/Dead staining confirmed good cell viability on both biomaterials prior to implantation. Overall, implantation of both biomaterials resulted in formation of well-vascularized granulation tissue without excessive inflammation, fibrosis or adverse reactions independent on group assignment and time point evaluated and thus, suggesting safety for prospective applications. However, our results also indicate that β-TCP may temporarily stimulate foreign body giant cell formation after hASCs supplementation suggesting a resorptive response. Both biomaterials required supplementation of hASCs and/or BMP-2 to induce osteoblastic
activity. However, BAG induced calcification exclusively when seeded with BMP-2 activated hASCs, whereas β-TCP required seeding with hASCs only.
Conclusion: BAG and β-TCP granules can be safely implanted subcutaneously, induce a different cellular response and require hASC and/or BMP-2 supplementation to induce osteoblastic activity and calcification. A combination of β-TCP and hASCs appeared to be a feasible way in enhancing osteoblastic activity resulting in early osteogenesis while minimizing safety and regulatory concerns in bone-tissue engineering.


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