3D-Printed Reinforcement Scaffolds with Targeted Biodegradation Properties for the Tissue Engineering of Articular Cartilage.
Autor: | Tosoratti E; Institute for Biomechanics, Otto-Stern-Weg 7, ETH Zürich, Zürich, CH-8093, Switzerland., Fisch P; Institute for Biomechanics, Otto-Stern-Weg 7, ETH Zürich, Zürich, CH-8093, Switzerland., Taylor S; Poly-Med Inc, 51 Technology Drive, Anderson, SC, 29625, USA., Laurent-Applegate LA; Regenerative Therapy Unit, Lausanne University Hospital, University of Lausanne, Épalinges, CH-1066, Switzerland.; Center for Applied Biotechnology and Molecular Medicine, University of Zürich, Zürich, CH-8057, Switzerland., Zenobi-Wong M; Institute for Biomechanics, Otto-Stern-Weg 7, ETH Zürich, Zürich, CH-8093, Switzerland. |
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Jazyk: | angličtina |
Zdroj: | Advanced healthcare materials [Adv Healthc Mater] 2021 Dec; Vol. 10 (23), pp. e2101094. Date of Electronic Publication: 2021 Oct 18. |
DOI: | 10.1002/adhm.202101094 |
Abstrakt: | Achieving regeneration of articular cartilage is challenging due to the low healing capacity of the tissue. Appropriate selection of cell source, hydrogel, and scaffold materials are critical to obtain good integration and long-term stability of implants in native tissues. Specifically, biomechanical stability and in vivo integration can be improved if the rate of degradation of the scaffold material matches the stiffening of the sample by extracellular matrix secretion of the encapsulated cells. To this end, a novel 3D-printed lactide copolymer is presented as a reinforcement scaffold for an enzymatically crosslinked hyaluronic acid hydrogel. In this system, the biodegradable properties of the reinforced scaffold are matched to the matrix deposition of articular chondrocytes embedded in the hydrogel. The lactide reinforcement provides stability to the soft hydrogel in the early stages, allowing the composite to be directly implanted in vivo with no need for a preculture period. Compared to pure cellular hydrogels, maturation and matrix secretion remain unaffected by the reinforced scaffold. Furthermore, excellent biocompatibility and production of glycosaminoglycans and collagens are observed at all timepoints. Finally, in vivo subcutaneous implantation in nude mice shows cartilage-like tissue maturation, indicating the possibility for the use of these composite materials in one-step surgical procedures. (© 2021 The Authors. Advanced Healthcare Materials published by Wiley-VCH GmbH.) |
Databáze: | MEDLINE |
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