PulmoStent: In Vitro to In Vivo Evaluation of a Tissue Engineered Endobronchial Stent |
| |
| Authors: | Anja Lena Thiebes author-information" >,Nicola Kelly,Caoimhe A. Sweeney,Donnacha J. McGrath,Johanna Clauser,Kathrin Kurtenbach,Valentine N. Gesche,Weiluan Chen,Robbert Jan Kok,Ulrich Steinseifer,Mark Bruzzi,Barry J. O’Brien,Peter E. McHugh,Stefan Jockenhoevel,Christian G. Cornelissen |
| |
| Affiliation: | 1.Department of Biohybrid & Medical Textiles (BioTex) at AME-Helmholtz Institute for Biomedical Engineering, ITA-Institut für Textiltechnik, RWTH Aachen University and at AMIBM Maastricht University, The Netherlands,Aachen,Germany;2.Biomechanics Research Centre, Biomedical Engineering, College of Engineering and Informatics,National University of Ireland,Galway,Ireland;3.Department of Cardiovascular Engineering, Institute of Applied Medical Engineering, Helmholtz Institute,RWTH Aachen University,Aachen,Germany;4.Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences,Utrecht University,Utrecht,The Netherlands;5.Department for Internal Medicine – Section for Pneumology, Medical Faculty,RWTH Aachen University,Aachen,Germany |
| |
| Abstract: | Currently, there is no optimal treatment available for end stage tumour patients with airway stenosis. The PulmoStent concept aims on overcoming current hurdles in airway stenting by combining a nitinol stent with a nutrient-permeable membrane, which prevents tumour ingrowth. Respiratory epithelial cells can be seeded onto the cover to restore mucociliary clearance. In this study, a novel hand-braided dog bone stent was developed, covered with a polycarbonate urethane nonwoven and mechanically tested. Design and manufacturing of stent and cover were improved in an iterative process according to predefined requirements for permeability and mechanical properties and finally tested in a proof of concept animal study in sheep for up to 24 weeks. In each animal two stents were implanted, one of which was cell-seeded by endoscopic spraying in situ. We demonstrated the suitability of this membrane for our concept by glucose transport testing and in vitro culture of respiratory epithelial cells. In the animal study, no migration occurred in any of the twelve stents. There was only mild granulation tissue formation and tissue reaction; no severe mucus plugging was observed. Thus, the PulmoStent concept might be a step forward for palliative treatment of airway stenosis with a biohybrid stent device. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
