101. De-epithelialization of porcine tracheal allografts as an approach for tracheal tissue engineering
- Author
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Hankyu Lee, John P. Soleas, Fabio Gava Aoki, David A. Romero, Ratna Varma, Siba Haykal, Alexander H. Li, Henrique Takachi Moriya, Golnaz Karoubi, Alba E. Marin-Araujo, Kayla Soon, Cristina H. Amon, and Thomas K. Waddell
- Subjects
0301 basic medicine ,Pathology ,medicine.medical_specialty ,Cell Survival ,Swine ,Population ,Fluorescent Antibody Technique ,lcsh:Medicine ,Respiratory Mucosa ,Regenerative Medicine ,Article ,Chondrocyte ,03 medical and health sciences ,Chondrocytes ,0302 clinical medicine ,Re-Epithelialization ,Tissue engineering ,medicine ,Animals ,Transplantation, Homologous ,lcsh:Science ,education ,Mechanical Phenomena ,Tracheal Epithelium ,education.field_of_study ,Multidisciplinary ,Decellularization ,Tissue Engineering ,business.industry ,Cartilage ,lcsh:R ,Allografts ,Epithelium ,Extracellular Matrix ,Trachea ,Transplantation ,030104 developmental biology ,medicine.anatomical_structure ,lcsh:Q ,business ,030217 neurology & neurosurgery - Abstract
Replacement of large tracheal defects remains an unmet clinical need. While recellularization of acellular tracheal grafts appeared to be a viable pathway, evidence from the clinic suggests otherwise. In hindsight, complete removal of chondrocytes and repopulation of the tracheal chondroid matrix to achieve functional tracheal cartilage may have been unrealistic. In contrast, the concept of a hybrid graft whereby the epithelium is removed and the immune-privileged cartilage is preserved is a radically different path with initial reports indicating potential clinical success. Here, we present a novel approach using a double-chamber bioreactor to de-epithelialize tracheal grafts and subsequently repopulate the grafts with exogenous cells. A 3 h treatment with sodium dodecyl sulfate perfused through the inner chamber efficiently removes the majority of the tracheal epithelium while the outer chamber, perfused with growth media, keeps most (68.6 ± 7.3%) of the chondrocyte population viable. De-epithelialized grafts support human bronchial epithelial cell (BEAS-2B) attachment, viability and growth over 7 days. While not without limitations, our approach suggests value in the ultimate use of a chimeric allograft with intact donor cartilage re-epithelialized with recipient-derived epithelium. By adopting a brief and partial decellularization approach, specifically removing the epithelium, we avoid the need for cartilage regeneration.
- Published
- 2019