Development of Scaffold-Free Elastic Cartilaginous Constructs with Structural Similarities to Auricular Cartilage
| Autor: | Renata Giardini-Rosa, Kathryn Thomas, Paulo Pinto Joazeiro, Joanna F. Weber, Kristina Collavino, Stephen D. Waldman |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Population
Biomedical Engineering Bioengineering Elastic cartilage Biochemistry Chondrocyte Biomaterials Bioreactors Ear Cartilage Tissue engineering medicine Animals Perichondrium education Auricle education.field_of_study Tissue Engineering Tissue Scaffolds business.industry Cartilage Elastic Cartilage Original Articles Anatomy Immunohistochemistry Elastin Extracellular Matrix medicine.anatomical_structure Female Proteoglycans Collagen Rabbits business Biomedical engineering |
| Zdroj: | Tissue Engineering Part A. 20:1012-1026 |
| ISSN: | 1937-335X 1937-3341 |
| DOI: | 10.1089/ten.tea.2013.0159 |
| Popis: | External ear reconstruction with autologous cartilage still remains one of the most difficult problems in the fields of plastic and reconstructive surgery. As the absence of tissue vascularization limits the ability to stimulate new tissue growth, relatively few surgical approaches are currently available (alloplastic implants or sculpted autologous cartilage grafts) to repair or reconstruct the auricle (or pinna) as a result of traumatic loss or congenital absence (e.g., microtia). Alternatively, tissue engineering can offer the potential to grow autogenous cartilage suitable for implantation. While tissue-engineered auricle cartilage constructs can be created, a substantial number of cells are required to generate sufficient quantities of tissue for reconstruction. Similarly, as routine cell expansion can elicit negative effects on chondrocyte function, we have developed an approach to generate large-sized engineered auricle constructs (≥3 cm(2)) directly from a small population of donor cells (20,000-40,000 cells/construct). Using rabbit donor cells, the developed bioreactor-cultivated constructs adopted structural-like characteristics similar to native auricular cartilage, including the development of distinct cartilaginous and perichondrium-like regions. Both alterations in media composition and seeding density had profound effects on the formation of engineered elastic tissue constructs in terms of cellularity, extracellular matrix accumulation, and tissue structure. Higher seeding densities and media containing sodium bicarbonate produced tissue constructs that were closer to the native tissue in terms of structure and composition. Future studies will be aimed at improving the accumulation of specific tissue constituents and determining the clinical effectiveness of this approach using a reconstructive animal model. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|