Abstract
Current therapeutic strategies for osteochondral restoration showed a limited regenerative potential. In fact, to promote the growth of articular cartilage and subchondral bone is a real challenge, due to the different functional and anatomical properties. To this purpose, alginate is a promising biomaterial for a scaffold-based approach, claiming optimal biocompatibility and good chondrogenic potential. A previously developed mineralized alginate scaffold was investigated in terms of the ability to support osteochondral regeneration both in a large and medium size animal model. The results were evaluated macroscopically and by microtomography, histology, histomorphometry, and immunohistochemical analysis. No evidence of adverse or inflammatory reactions was observed in both models, but limited subchondral bone formation was present, together with a slow scaffold resorption time.
The implantation of this biphasic alginate scaffold provided partial osteochondral regeneration in the animal model. Further studies are needed to evaluate possible improvement in terms of osteochondral tissue regeneration for this biomaterial.
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Acknowledgements
This study was supported by European Project OPHIS-COMPOSITE PHENOTYPIC TRIGGERS FOR BONE AND CARTILAGE REPAIR (FP7-NMP-2009-SMALL 3-246373).
Author contributions
GF: conception and design of the study, animal surgery, manuscript drafting. FP: collaboration for animal surgery, macroscopic evaluations, manuscript drafting. MG: scaffold development and production, manuscript drafting. MF: manuscript drafting, analysis and interpretation of the data, final approval of the article. FD: scaffold development and production, manuscript drafting. MM: senior scientific consultant, critical revision of the article. APP: microtomography analysis. AR: logistic support, assembly of the data, manuscript drafting. FS: histological and histomorphometric analysis on sheep. MS: histological analysis on rabbits. KS: scaffold development and production, manuscript drafting. EK: obtaining of funding, conception and design of the study, animal surgery, final approval of the article
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GF is consultant for: Finceramica Faenza S.p.A, Italy; Fidia farmaceutica, Italy; CartiHeal ltd (2009) Israel, EON Medica, Italy. MM receives royalties from Finceramica Faenza S.p.A., Italy. EK is consultant for Finceramica Faenza S.p.A., Italy; CartiHeal (2009) ltd, Israel. GF, EK, MM receive Institutional Support from FinCeramica Faenza S.p.A.; Fidia farmaceutica, Italy, IGEA Biomedical, Italy, Zimmer-BIOMET, USA, Kensey Nash, USA. The remaing authors declare that they have no conflict of interest.
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Filardo, G., Perdisa, F., Gelinsky, M. et al. Novel alginate biphasic scaffold for osteochondral regeneration: an in vivo evaluation in rabbit and sheep models. J Mater Sci: Mater Med 29, 74 (2018). https://doi.org/10.1007/s10856-018-6074-0
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DOI: https://doi.org/10.1007/s10856-018-6074-0