Mechanical characterization of porcine ureter for the evaluation of tissue-engineering applications.

Autor:	Casarin M; Department of Surgery, Oncology and Gastroenterology, University of Padua, Padova, Italy., Toniolo I; Department of Industrial Engineering, University of Padua, Padova, Italy., Todesco M; Department of Civil, Environmental and Architectural Engineering, University of Padua, Padova, Italy., Carniel EL; Department of Industrial Engineering, University of Padua, Padova, Italy., Astolfi L; Bioacoustics Research Laboratory, Department of Neuroscience DNS, University of Padova, Padova, Italy., Morlacco A; Department of Surgery, Oncology and Gastroenterology, University of Padua, Padova, Italy., Moro FD; Department of Surgery, Oncology and Gastroenterology, University of Padua, Padova, Italy.
Jazyk:	angličtina
Zdroj:	Frontiers in bioengineering and biotechnology [Front Bioeng Biotechnol] 2024 Jun 17; Vol. 12, pp. 1412136. Date of Electronic Publication: 2024 Jun 17 (Print Publication: 2024).
DOI:	10.3389/fbioe.2024.1412136
Abstrakt:	Introduction: Clinics increasingly require readily deployable tubular substitutes to restore the functionality of structures like ureters and blood vessels. Despite extensive exploration of various materials, both synthetic and biological, the optimal solution remains elusive. Drawing on abundant literature experiences, there is a pressing demand for a substitute that not only emulates native tissue by providing requisite signals and growth factors but also exhibits appropriate mechanical resilience and behaviour. Methods: This study aims to assess the potential of porcine ureters by characterizing their biomechanical properties in their native configuration through ring and membrane flexion tests. In order to assess the tissue morphology before and after mechanical tests and the eventual alteration of tissue microstructure that would be inserted in material constitutive description, histological staining was performed on samples. Corresponding computational analyses were performed to mimic the experimental campaign to identify the constitutive material parameters. Results: The absence of any damages to muscle and collagen fibres, which only compacted after mechanical tests, was demonstrated. The experimental tests (ring and membrane flexion tests) showed non-linearity for material and geometry and the viscoelastic behaviour of the native porcine ureter. Computational models were descriptive of the mechanical behaviour ureteral tissue, and the material model feasible. Discussion: This analysis will be useful for future comparison with decellularized tissue for the evaluation of the aggression of cell removal and its effect on microstructure. The computational model could lay the basis for a reliable tool for the prediction of solicitation in the case of tubular substitutions in subsequent simulations. Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. The author(s) declared that they were an editorial board member of Frontiers, at the time of submission. This had no impact on the peer review process and the final decision. (Copyright © 2024 Casarin, Toniolo, Todesco, Carniel, Astolfi, Morlacco and Moro.)
Databáze:	MEDLINE
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