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Casarin M, Toniolo I, Todesco M, Carniel EL, Astolfi L, Morlacco A, Moro FD. Mechanical characterization of porcine ureter for the evaluation of tissue-engineering applications. Front Bioeng Biotechnol 2024; 12:1412136. [PMID: 38952671 PMCID: PMC11215493 DOI: 10.3389/fbioe.2024.1412136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2024] [Accepted: 05/21/2024] [Indexed: 07/03/2024] Open
Abstract
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.
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Affiliation(s)
- Martina Casarin
- Department of Surgery, Oncology and Gastroenterology, University of Padua, Padova, Italy
| | - Ilaria Toniolo
- Department of Industrial Engineering, University of Padua, Padova, Italy
| | - Martina Todesco
- Department of Civil, Environmental and Architectural Engineering, University of Padua, Padova, Italy
| | | | - Laura Astolfi
- Bioacoustics Research Laboratory, Department of Neuroscience DNS, University of Padova, Padova, Italy
| | - Alessandro Morlacco
- Department of Surgery, Oncology and Gastroenterology, University of Padua, Padova, Italy
| | - Fabrizio Dal Moro
- Department of Surgery, Oncology and Gastroenterology, University of Padua, Padova, Italy
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2
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Booth D, Afshari R, Ghovvati M, Shariati K, Sturm R, Annabi N. Advances in 3D bioprinting for urethral tissue reconstruction. Trends Biotechnol 2024; 42:544-559. [PMID: 38057169 DOI: 10.1016/j.tibtech.2023.10.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 10/20/2023] [Accepted: 10/24/2023] [Indexed: 12/08/2023]
Abstract
Urethral conditions affect children and adults, increasing the risk of urinary tract infections, voiding and sexual dysfunction, and renal failure. Current tissue replacements differ from healthy urethral tissues in structural and mechanical characteristics, causing high risk of postoperative complications. 3D bioprinting can overcome these limitations through the creation of complex, layered architectures using materials with location-specific biomechanical properties. This review highlights prior research and describes the potential for these emerging technologies to address ongoing challenges in urethral tissue engineering, including biomechanical and structural mismatch, lack of individualized repair solutions, and inadequate wound healing and vascularization. In the future, the integration of 3D bioprinting technology with advanced biomaterials, computational modeling, and 3D imaging could transform personalized urethral surgical procedures.
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Affiliation(s)
- Daniel Booth
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Ronak Afshari
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Mahsa Ghovvati
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Kaavian Shariati
- David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Renea Sturm
- David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095, USA; Department of Urology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095, USA.
| | - Nasim Annabi
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA; Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA 90095, USA.
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3
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Arabzadeh Bahri R, Peisepar M, Maleki S, Esmaeilpur Abianeh F, A Basti F, Kolahdooz A. Current evidence regarding alternative techniques for enterocystoplasty using regenerative medicine methods: a systematic review. Eur J Med Res 2024; 29:163. [PMID: 38475865 DOI: 10.1186/s40001-024-01757-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 02/29/2024] [Indexed: 03/14/2024] Open
Abstract
Enterocystoplasty is the most commonly used treatment for bladder reconstruction. However, it has some major complications. In this study, we systematically reviewed the alternative techniques for enterocystoplasty using different scaffolds. A comprehensive search was conducted in PubMed, Embase, and Cochrane Library, and a total of 10 studies were included in this study. Five different scaffolds were evaluated, including small intestinal submucosa (SIS), biodegradable scaffolds seeded with autologous bladder muscle and urothelial cells, dura mater, human cadaveric bladder acellular matrix graft, and bovine pericardium. The overall results revealed that bladder reconstruction using regenerative medicine is an excellent alternative method to enterocystoplasty regarding the improvement of bladder capacity, bladder compliance, and maximum detrusor pressure; however, more large-scale studies are required.
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Affiliation(s)
- Razman Arabzadeh Bahri
- Urology Research Center, Tehran University of Medical Sciences, Tehran, Iran.
- Universal Scientific Education and Research Network (USERN), Tehran, Iran.
| | - Maral Peisepar
- Universal Scientific Education and Research Network (USERN), Tehran, Iran
- School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Saba Maleki
- School of Medicine, Guilan University of Medical Sciences, Rasht, Iran
| | - Fatemeh Esmaeilpur Abianeh
- Universal Scientific Education and Research Network (USERN), Tehran, Iran
- School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Fatemeh A Basti
- Tehran Medical Branch, Islamic Azad University, Tehran, Iran
| | - Ali Kolahdooz
- Student Research Committee, School of Medicine, Alborz University of Medical Sciences, Karaj, Iran
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4
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Elia E, Caneparo C, McMartin C, Chabaud S, Bolduc S. Tissue Engineering for Penile Reconstruction. Bioengineering (Basel) 2024; 11:230. [PMID: 38534504 DOI: 10.3390/bioengineering11030230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 02/19/2024] [Accepted: 02/23/2024] [Indexed: 03/28/2024] Open
Abstract
The penis is a complex organ with a development cycle from the fetal stage to puberty. In addition, it may suffer from either congenital or acquired anomalies. Penile surgical reconstruction has been the center of interest for many researchers but is still challenging due to the complexity of its anatomy and functionality. In this review, penile anatomy, pathologies, and current treatments are described, including surgical techniques and tissue engineering approaches. The self-assembly technique currently applied is emphasized since it is considered promising for an adequate tissue-engineered penile reconstructed substitute.
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Affiliation(s)
- Elissa Elia
- Centre de Recherche en Organogénèse Expérimentale/LOEX, Regenerative Medicine Division, CHU de Québec-Université Laval Research Center, Québec, QC G1J 1Z4, Canada
| | - Christophe Caneparo
- Centre de Recherche en Organogénèse Expérimentale/LOEX, Regenerative Medicine Division, CHU de Québec-Université Laval Research Center, Québec, QC G1J 1Z4, Canada
| | - Catherine McMartin
- Division of Urology, Department of Surgery, CHU de Québec-Université Laval, Québec, QC G1V 4G2, Canada
| | - Stéphane Chabaud
- Centre de Recherche en Organogénèse Expérimentale/LOEX, Regenerative Medicine Division, CHU de Québec-Université Laval Research Center, Québec, QC G1J 1Z4, Canada
| | - Stéphane Bolduc
- Centre de Recherche en Organogénèse Expérimentale/LOEX, Regenerative Medicine Division, CHU de Québec-Université Laval Research Center, Québec, QC G1J 1Z4, Canada
- Division of Urology, Department of Surgery, CHU de Québec-Université Laval, Québec, QC G1V 4G2, Canada
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5
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Yotsova R, Peev S. Biological Properties and Medical Applications of Carbonate Apatite: A Systematic Review. Pharmaceutics 2024; 16:291. [PMID: 38399345 PMCID: PMC10892468 DOI: 10.3390/pharmaceutics16020291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 02/10/2024] [Accepted: 02/15/2024] [Indexed: 02/25/2024] Open
Abstract
Bone defects represent an everyday challenge for clinicians who work in the fields of orthopedic surgery, maxillofacial and oral surgery, otorhinolaryngology, and dental implantology. Various bone substitutes have been developed and utilized, according to the needs of bone reconstructive surgery. Carbonate apatite has gained popularity in recent years, due to its excellent tissue behavior and osteoconductive potential. This systematic review aims to evaluate the role of carbonate apatite in bone reconstructive surgery and tissue engineering, analyze its advantages and limitations, and suggest further directions for research and development. The Web of Science, PubMed, and Scopus electronic databases were searched for relevant review articles, published from January 2014 to 21 July 2023. The study was conducted in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Eighteen studies were included in the present review. The biological properties and medical applications of carbonate apatite (CO3Ap) are discussed and evaluated. The majority of articles demonstrated that CO3Ap has excellent biocompatibility, resorbability, and osteoconductivity. Furthermore, it resembles bone tissue and causes minimal immunological reactions. Therefore, it may be successfully utilized in various medical applications, such as bone substitution, scaffolding, implant coating, drug delivery, and tissue engineering.
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Affiliation(s)
- Ralitsa Yotsova
- Department of Oral Surgery, Faculty of Dental Medicine, Medical University of Varna, bul. Tsar Osvoboditel 84, 9002 Varna, Bulgaria
| | - Stefan Peev
- Department of Periodontology and Dental Implantology, Faculty of Dental Medicine, Medical University of Varna, bul. Tsar Osvoboditel 84, 9002 Varna, Bulgaria;
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6
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Blanco-Elices C, Oruezabal RI, Sánchez-Porras D, Chato-Astrain J, Campos F, Alaminos M, Garzón I, Campos A. A novel 3D biofabrication strategy to improve cell proliferation and differentiation of human Wharton's jelly mesenchymal stromal cells for cell therapy and tissue engineering. Front Bioeng Biotechnol 2023; 11:1235161. [PMID: 37636000 PMCID: PMC10448765 DOI: 10.3389/fbioe.2023.1235161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 08/04/2023] [Indexed: 08/29/2023] Open
Abstract
Purpose: Obtaining sufficient numbers of cells in a short time is a major goal of cell culturing in cell therapy and tissue engineering. However, current bidimensional (2D) culture methods are associated to several limitations, including low efficiency and the loss of key cell differentiation markers on cultured cells. Methods: In the present work, we have designed a novel biofabrication method based on a three-dimensional (3D) culture system (FIBRIAGAR-3D). Human Wharton's jelly mesenchymal stromal cells (HWJSC) were cultured in 3D using 100%, 75%, 50%, and 25% concentrations of fibrin-agarose biomaterials (FA100, FA75, FA50 and FA25 group) and compared with control cells cultured using classical 2D systems (CTR-2D). Results: Our results showed a significant increase in the number of cells generated after 7 days of culture, with cells displaying numerous expansions towards the biomaterial, and a significant overexpression of the cell proliferation marker KI67 was found for the FA75 and FA100 groups. TUNEL and qRT-PCR analyses demonstrated that the use of FIBRIAGAR-3D was not associated with an induction of apoptosis by cultured cells. Instead, the 3D system retained the expression of typical phenotypic markers of HWJSC, including CD73, CD90, CD105, NANOG and OCT4, and biosynthesis markers such as types-I and IV collagens, with significant increase of some of these markers, especially in the FA100 group. Finally, our analysis of 8 cell signaling molecules revealed a significant decrease of GM-CSF, IFN-g, IL2, IL4, IL6, IL8, and TNFα, suggesting that the 3D culture system did not induce the expression of pro-inflammatory molecules. Conclusion: These results confirm the usefulness of FIBRIAGAR-3D culture systems to increase cell proliferation without altering cell phenotype of immunogenicity and opens the door to the possibility of using this novel biofabrication method in cell therapy and tissue engineering of the human cornea, oral mucosa, skin, urethra, among other structures.
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Affiliation(s)
- Cristina Blanco-Elices
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, Universidad de Granada, Granada, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
| | | | - David Sánchez-Porras
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, Universidad de Granada, Granada, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
| | - Jesús Chato-Astrain
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, Universidad de Granada, Granada, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
| | - Fernando Campos
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, Universidad de Granada, Granada, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
| | - Miguel Alaminos
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, Universidad de Granada, Granada, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
| | - Ingrid Garzón
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, Universidad de Granada, Granada, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
| | - Antonio Campos
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, Universidad de Granada, Granada, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
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7
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Topoliova K, Harsanyi S, Danisovic L, Ziaran S. Tissue Engineering and Stem Cell Therapy in Neurogenic Bladder Dysfunction: Current and Future Perspectives. MEDICINA (KAUNAS, LITHUANIA) 2023; 59:1416. [PMID: 37629705 PMCID: PMC10456466 DOI: 10.3390/medicina59081416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 07/21/2023] [Accepted: 07/31/2023] [Indexed: 08/27/2023]
Abstract
Tissue engineering (TE) is a rapidly evolving biomedical discipline that can play an important role in treating neurogenic bladder dysfunction and compensating for current conventional options' shortcomings. This review aims to analyze the current status of preclinical and clinical trials and discuss what could be expected in the future based on the current state of the art. Although most preclinical studies provide promising results on the effectiveness of TE and stem cell therapies, the main limitations are mainly the very slow translation of preclinical trials to clinical trials, lack of quality research on neurogenic preconditions of neurogenic bladder dysfunction outside of the spinal cord injury and varying therapeutic methods of the existing research that lacks a standardized approach.
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Affiliation(s)
- Katarina Topoliova
- National Institute of Rheumatic Diseases, Nabrezie I. Krasku 4, 921 12 Piestany, Slovakia; (K.T.); (S.H.); (S.Z.)
- Department of Urology, Faculty of Medicine, Comenius University in Bratislava, Limbova 5, 833 05 Bratislava, Slovakia
| | - Stefan Harsanyi
- National Institute of Rheumatic Diseases, Nabrezie I. Krasku 4, 921 12 Piestany, Slovakia; (K.T.); (S.H.); (S.Z.)
- Institute of Medical Biology, Genetics and Clinical Genetics, Faculty of Medicine, Comenius University in Bratislava, Sasinkova 4, 811 08 Bratislava, Slovakia
| | - Lubos Danisovic
- National Institute of Rheumatic Diseases, Nabrezie I. Krasku 4, 921 12 Piestany, Slovakia; (K.T.); (S.H.); (S.Z.)
- Institute of Medical Biology, Genetics and Clinical Genetics, Faculty of Medicine, Comenius University in Bratislava, Sasinkova 4, 811 08 Bratislava, Slovakia
- Regenmed Ltd., Medena 29, 811 02 Bratislava, Slovakia
| | - Stanislav Ziaran
- National Institute of Rheumatic Diseases, Nabrezie I. Krasku 4, 921 12 Piestany, Slovakia; (K.T.); (S.H.); (S.Z.)
- Department of Urology, Faculty of Medicine, Comenius University in Bratislava, Limbova 5, 833 05 Bratislava, Slovakia
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8
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Farzamfar S, Richer M, Rahmani M, Naji M, Aleahmad M, Chabaud S, Bolduc S. Biological Macromolecule-Based Scaffolds for Urethra Reconstruction. Biomolecules 2023; 13:1167. [PMID: 37627232 PMCID: PMC10452429 DOI: 10.3390/biom13081167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 07/17/2023] [Accepted: 07/17/2023] [Indexed: 08/27/2023] Open
Abstract
Urethral reconstruction strategies are limited with many associated drawbacks. In this context, the main challenge is the unavailability of a suitable tissue that can endure urine exposure. However, most of the used tissues in clinical practices are non-specialized grafts that finally fail to prevent urine leakage. Tissue engineering has offered novel solutions to address this dilemma. In this technology, scaffolding biomaterials characteristics are of prime importance. Biological macromolecules are naturally derived polymers that have been extensively studied for various tissue engineering applications. This review discusses the recent advances, applications, and challenges of biological macromolecule-based scaffolds in urethral reconstruction.
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Affiliation(s)
- Saeed Farzamfar
- Centre de Recherche en Organogénèse Expérimentale/LOEX, Regenerative Medicine Division, CHU de Québec-Université Laval Research Center, Quebec, QC G1V 4G2, Canada; (S.F.); (M.R.); (S.C.)
| | - Megan Richer
- Centre de Recherche en Organogénèse Expérimentale/LOEX, Regenerative Medicine Division, CHU de Québec-Université Laval Research Center, Quebec, QC G1V 4G2, Canada; (S.F.); (M.R.); (S.C.)
| | - Mahya Rahmani
- Department of Tissue Engineering and Applied Cell Sciences, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran 1983963113, Iran;
| | - Mohammad Naji
- Urology and Nephrology Research Center, Shahid Beheshti University of Medical Sciences, Tehran 1983963113, Iran;
| | - Mehdi Aleahmad
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran 1417613151, Iran;
| | - Stéphane Chabaud
- Centre de Recherche en Organogénèse Expérimentale/LOEX, Regenerative Medicine Division, CHU de Québec-Université Laval Research Center, Quebec, QC G1V 4G2, Canada; (S.F.); (M.R.); (S.C.)
| | - Stéphane Bolduc
- Centre de Recherche en Organogénèse Expérimentale/LOEX, Regenerative Medicine Division, CHU de Québec-Université Laval Research Center, Quebec, QC G1V 4G2, Canada; (S.F.); (M.R.); (S.C.)
- Department of Surgery, Faculty of Medicine, Laval University, Quebec, QC G1V 0A6, Canada
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9
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Guo L, Hu K, Wang H. Antimicrobial and Mechanical Properties of Ag@Ti 3C 2T x-Modified PVA Composite Hydrogels Enhanced with Quaternary Ammonium Chitosan. Polymers (Basel) 2023; 15:polym15102352. [PMID: 37242927 DOI: 10.3390/polym15102352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 05/11/2023] [Accepted: 05/11/2023] [Indexed: 05/28/2023] Open
Abstract
Polyvinyl alcohol (PVA) is a polymeric material with good biocompatibility, excellent hydrophilicity, and a large number of hydroxyl groups. However, due to its insufficient mechanical properties and poor inhibition of bacteria, it has a lack of applications in wound dressings, stent materials, and other fields. In this study, a simple method was used to prepare composite gel materials: Ag@MXene-HACC-PVA hydrogels with a double-network structure were prepared using an acetal reaction. Due to the double cross-linked interaction, the hydrogel has good mechanical properties and is resistant to swelling. The adhesion and bacterial inhibition were enhanced due to the addition of HACC. In addition, the strain sensing properties of this conductive hydrogel were stable, and the GF (specification factor) was 1.7617 at 40-90% strain. Therefore, the dual-network hydrogel with excellent sensing properties, adhesion properties, antibacterial properties, and cytocompatibility has potential applications in biomedical materials, especially as a tissue engineering repair material.
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Affiliation(s)
- Linxinzheng Guo
- Beijing Engineering Research Center of Printed Electronics, Institute of Printing and Packaging Engineering, Beijing Institute of Graphic Communication, Beijing 102600, China
| | - Kun Hu
- Beijing Engineering Research Center of Printed Electronics, Institute of Printing and Packaging Engineering, Beijing Institute of Graphic Communication, Beijing 102600, China
- Collage of Biological Science and Engineering, Fuzhou University, Fuzhou 350108, China
| | - Haibo Wang
- Beijing Engineering Research Center of Printed Electronics, Institute of Printing and Packaging Engineering, Beijing Institute of Graphic Communication, Beijing 102600, China
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10
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Preliminary In Vitro Assessment of Decellularized Porcine Descending Aorta for Clinical Purposes. J Funct Biomater 2023; 14:jfb14030141. [PMID: 36976065 PMCID: PMC10058365 DOI: 10.3390/jfb14030141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 02/28/2023] [Indexed: 03/06/2023] Open
Abstract
Conduit substitutes are increasingly in demand for cardiovascular and urological applications. In cases of bladder cancer, radical cystectomy is the preferred technique: after removing the bladder, a urinary diversion has to be created using autologous bowel, but several complications are associated with intestinal resection. Thus, alternative urinary substitutes are required to avoid autologous intestinal use, preventing complications and facilitating surgical procedures. In the present paper, we are proposing the exploitation of the decellularized porcine descending aorta as a novel and original conduit substitute. After being decellularized with the use of two alternative detergents (Tergitol and Ecosurf) and sterilized, the porcine descending aorta has been investigated to assess its permeability to detergents through methylene blue dye penetration analysis and to study its composition and structure by means of histomorphometric analyses, including DNA quantification, histology, two-photon microscopy, and hydroxyproline quantification. Biomechanical tests and cytocompatibility assays with human mesenchymal stem cells have been also performed. The results obtained demonstrated that the decellularized porcine descending aorta preserves its major features to be further evaluated as a candidate material for urological applications, even though further studies have to be carried out to demonstrate its suitability for the specific application, by performing in vivo tests in the animal model.
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11
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Jiao W, Yu W, Wang Y, Zhang J, Wang Y, He H, Shi G. Fibrinogen/poly(l-lactide-co-caprolactone) copolymer scaffold: A potent adhesive material for urethral tissue regeneration in urethral injury treatment. Regen Ther 2023; 22:136-147. [PMID: 36793307 PMCID: PMC9923042 DOI: 10.1016/j.reth.2022.12.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 10/02/2022] [Accepted: 12/13/2022] [Indexed: 01/30/2023] Open
Abstract
Since a scarcity of sufficient grafting materials, several complications can arise after urothelial defect reconstruction surgery, including severe hypospadias. Accordingly, developing alternative therapies, such as urethral restoration via tissue engineering are needed. In the present study, we developed a potent adhesive and repairing material using fibrinogen-poly(l-lactide-co-caprolactone) copolymer (Fib-PLCL) nanofiber scaffold to achieve effective urethral tissue regeneration after seeding with epithelial cells on the surface. The in vitro result found the Fib-PLCL scaffold promoted the attachment and viability of epithelial cells on their surface. The increased expression levels of cytokeratin and actin filaments were observed in Fib-PLCL scaffold than PLCL scaffold. The in vivo urethral injury repairing potential of Fib-PLCL scaffold was evaluated using a rabbit urethral replacement model. In this study, a urethral defect was surgically excised and replaced with the Fib-PLCL and PLCL scaffolds or autograft. As expected, the animals healed well after surgery in the Fib-PLCL scaffold group, and no significant strictures were identified. As expected, the cellularized Fib/PLCL grafts have induced the luminal epithelialization, urethral smooth muscle cell remodelling, and capillary development all at the same time. Histological analysis revealed that the urothelial integrity in the Fib-PLCL group had progressed to that of a normal urothelium, with enhanced urethral tissue development. Based on the results, the present study suggests that the prepared fibrinogen-PLCL scaffold is more appropriate for urethral defect reconstruction.
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Affiliation(s)
- Wei Jiao
- Department of Urology, Shanghai Fifth People's Hospital, Fudan University, No. 801 Heqing Road, Minhang District, Shanghai 200240, China
| | - Wandong Yu
- Department of Urology, Shanghai Fifth People's Hospital, Fudan University, No. 801 Heqing Road, Minhang District, Shanghai 200240, China
| | - Yangyun Wang
- Department of Urology, Shanghai Fifth People's Hospital, Fudan University, No. 801 Heqing Road, Minhang District, Shanghai 200240, China
| | - Jun Zhang
- Department of Urology, Shanghai Fifth People's Hospital, Fudan University, No. 801 Heqing Road, Minhang District, Shanghai 200240, China
| | - Yang Wang
- Department of Urology, Shanghai Fifth People's Hospital, Fudan University, No. 801 Heqing Road, Minhang District, Shanghai 200240, China
| | - Hongbing He
- Shanghai Songli Biotechnology Co., Ltd, Shanghai 201206, China
| | - Guowei Shi
- Department of Urology, Shanghai Fifth People's Hospital, Fudan University, No. 801 Heqing Road, Minhang District, Shanghai 200240, China
- Corresponding author.
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12
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Fu Z, Xiao S, Wang P, Zhao J, Ling Z, An Z, Shao J, Fu W. Injectable, stretchable, toughened, bioadhesive composite hydrogel for bladder injury repair †. RSC Adv 2023; 13:10903-10913. [PMID: 37033438 PMCID: PMC10076968 DOI: 10.1039/d3ra00402c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 03/07/2023] [Indexed: 04/08/2023] Open
Abstract
The bladder is exposed to constant internal and external mechanical forces due to its deformation and the dynamic environment in which it is placed, which can hamper its repair after an injury. Traditional hydrogel materials have limitations regarding their use in the bladder owing to their poor mechanical and tissue adhesion properties. In this study, a composite hydrogel composed of methacrylate gelatine, methacrylated silk fibroin, and Pluronic F127 diacrylate was developed, which combines the characteristics of natural and synthetic polymers. The mechanical properties of the novel hydrogel, such as stretchability, viscoelasticity, and toughness, were improved by virtue of a particular molecular design strategy whereby covalent and non-covalent bond interactions create a cross-linking effect. In addition, the composite hydrogel has important usability properties; it can be injected in liquid format and rapidly transformed into a gel via photo-initiated crosslinking. This was demonstrated on an isolated porcine bladder where the hydrogel closed arbitrarily-shaped tissue defects within 90 s of its application, verifying its effective bioadhesive and sealing properties. This composite hydrogel has great potential for application in bladder injury repair as a tissue-engineering scaffold. An injectable, stretchable, toughened, bioadhesive composite hydrogel offers a new application strategy for sutureless repair and tissue regeneration of injured bladders.![]()
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Affiliation(s)
- Zhouyang Fu
- Department of Urology, The Third Medical Centre, Chinese PLA General HospitalBeijing100853China
- Medical School of Chinese PLABeijing100853China
| | - Shuwei Xiao
- Department of Urology, The Third Medical Centre, Chinese PLA General HospitalBeijing100853China
- Department of Urology, Air Force Medical CenterBeijing100142China
| | - Pengchao Wang
- Medical School of Chinese PLABeijing100853China
- Department of Urology, Hainan Hospital of PLA General HospitalHainan572013China
| | - Jian Zhao
- Department of Urology, The Third Medical Centre, Chinese PLA General HospitalBeijing100853China
- Medical School of Chinese PLABeijing100853China
| | - Zhengyun Ling
- Department of Urology, The Third Medical Centre, Chinese PLA General HospitalBeijing100853China
- Medical School of Chinese PLABeijing100853China
| | - Ziyan An
- Department of Urology, The Third Medical Centre, Chinese PLA General HospitalBeijing100853China
- Medical School of Chinese PLABeijing100853China
| | - Jinpeng Shao
- Department of Urology, The Third Medical Centre, Chinese PLA General HospitalBeijing100853China
- Medical School of Chinese PLABeijing100853China
| | - Weijun Fu
- Department of Urology, The Third Medical Centre, Chinese PLA General HospitalBeijing100853China
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