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Wu Z, Tang Z, Zheng Z, Tan S. A novel trauma induced urethral stricture in rat model. Sci Rep 2024; 14:6325. [PMID: 38491041 PMCID: PMC10943079 DOI: 10.1038/s41598-024-55408-8] [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: 11/02/2023] [Accepted: 02/22/2024] [Indexed: 03/18/2024] Open
Abstract
Urethral stricture (US) is a longstanding disease, while there has not existed a suitable animal model to mimic the condition. We aimed to establish a trauma-induced US animal model to simulate this clinical scenario. A total of 30 rats were equally distributed into two groups, sham and US group. All rats were anesthetized with isoflurane and undergone cystostomy. In the US group, a 2 mm incision was made in the urethra and sutured to induce US. The sham group only make a skin incision on the ventral side of the anterior urethra. 4 weeks later, ultrasound and cystourethrography were performed to evaluate the degree of urethral stricture, pathological examinations were carried out to evaluate the degree of fibrosis. Urodynamic evaluation and mechanical tissue testing were performed to evaluate the bladder function and urethral tissue stiffness. The results showed that the urethral mucosa was disrupted and urethral lumen was stenosed in the US group. Additionally, the US group showed elevated bladder pressure, prolonged micturition intervals and increased tissue stiffness. In conclusion, the rat urethral stricture model induced by trauma provides a closer representation of the real clinical scenario. This model will significantly contribute to advancing research on the mechanisms underlying traumatic urethral stricture.
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Affiliation(s)
- Ziqiang Wu
- Department of Urology, Xiangya Hospital of Central South University, Changsha, People's Republic of China
- Provincial Laboratory for Diagnosis and Treatment of Genitourinary System Disease, Changsha, People's Republic of China
| | - Zhengyan Tang
- Department of Urology, Xiangya Hospital of Central South University, Changsha, People's Republic of China
- Provincial Laboratory for Diagnosis and Treatment of Genitourinary System Disease, Changsha, People's Republic of China
| | - Zhihuan Zheng
- Department of Urology, Xiangya Hospital of Central South University, Changsha, People's Republic of China.
- Provincial Laboratory for Diagnosis and Treatment of Genitourinary System Disease, Changsha, People's Republic of China.
| | - Shuo Tan
- Department of Urology, Third Xiangya Hospital of Central South University, Changsha, People's Republic of China.
- Provincial Laboratory for Diagnosis and Treatment of Genitourinary System Disease, Changsha, People's Republic of China.
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Abbas TO, Parangusan H, Yalcin HC, Hassan M, Zakrif L, Zandi N, Pennisi CP. Trilayer composite scaffold for urethral reconstruction: in vitroevaluation of mechanical, biological, and angiogenic properties. Biomed Mater 2024; 19:025022. [PMID: 38194708 DOI: 10.1088/1748-605x/ad1c9c] [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: 08/08/2023] [Accepted: 01/09/2024] [Indexed: 01/11/2024]
Abstract
Regeneration of damaged urethral tissue remains a major challenge in the field of lower urinary tract reconstruction. To address this issue, various synthetic and natural biodegradable biomaterials are currently being explored for the fabrication of scaffolds that promote urethral regeneration and healing. In this study, we present an approach to fabricate a trilayer hybrid scaffold comprising a central layer of poly(lactic acid) (PLA) between two layers of chitosan. The chitosan/PLA/chitosan (CPC) scaffolds were fabricated by a sequential electrospinning process and their properties were evaluated for their suitability for urethral tissue engineering. The physical and biological properties of the CPC scaffolds were evaluated in comparison to electrospun PLA scaffolds and acellular dermis (Alloderm) as controls for a synthetic and a natural scaffold, respectively. Compared to the controls, the CPC scaffolds exhibited higher elastic modulus and ultimate tensile strength, while maintaining extensibility and suture retention strength appropriate for clinical use. The CPC scaffolds displayed significant hydrophilicity, which was associated with a higher water absorption capacity of the chitosan nanofibres. The degradation products of the CPC scaffolds did not exhibit cytotoxicity and promoted wound closure by fibroblastsin vitro. In addition, CPC scaffolds showed increased growth of smooth muscle cells, an essential component for functional regeneration of urethral tissue. Furthermore, in a chicken embryo-based assay, CPC scaffolds demonstrated significantly higher angiogenic potential, indicating their ability to promote vascularisation, a crucial aspect for successful urethral reconstruction. Overall, these results suggest that CPC hybrid scaffolds containing both natural and synthetic components offer significant advantages over conventional acellular or synthetic materials alone. CPC scaffolds show promise as potential candidates for further research into the reconstruction of the urethrain vivo.
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Affiliation(s)
- Tariq O Abbas
- Regenerative Medicine Group, Department of Health Science and Technology, Aalborg University, Aalborg, Denmark
- Pediatric Surgery Department, Hamad General Hospital, Doha, Qatar
- College of Medicine, Qatar University, Doha, Qatar
- Weill Cornell Medicine-Qatar, Doha, Qatar
- Urology Division, Urology Department, Sidra Medicine, Doha, Qatar
| | | | - Huseyin C Yalcin
- Biomedical Research Centre, Qatar University, Doha, Qatar
- Department of Biomedical Science, College of Health Sciences, QU Health, Qatar University, Doha, Qatar
| | - Mohamed Hassan
- Centre for Advanced Materials, Qatar University, Doha, Qatar
| | - Lubna Zakrif
- Biomedical Research Centre, Qatar University, Doha, Qatar
| | - Nooshin Zandi
- Regenerative Medicine Group, Department of Health Science and Technology, Aalborg University, Aalborg, Denmark
| | - Cristian P Pennisi
- Regenerative Medicine Group, Department of Health Science and Technology, Aalborg University, Aalborg, Denmark
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Jin Y, Zhao W, Yang M, Fang W, Gao G, Wang Y, Fu Q. Cell-Based Therapy for Urethral Regeneration: A Narrative Review and Future Perspectives. Biomedicines 2023; 11:2366. [PMID: 37760808 PMCID: PMC10525510 DOI: 10.3390/biomedicines11092366] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Revised: 07/29/2023] [Accepted: 08/16/2023] [Indexed: 09/29/2023] Open
Abstract
Urethral stricture is a common urological disease that seriously affects quality of life. Urethroplasty with grafts is the primary treatment, but the autografts used in clinical practice have unavoidable disadvantages, which have contributed to the development of urethral tissue engineering. Using various types of seed cells in combination with biomaterials to construct a tissue-engineered urethra provides a new treatment method to repair long-segment urethral strictures. To date, various cell types have been explored and applied in the field of urethral regeneration. However, no optimal strategy for the source, selection, and application conditions of the cells is available. This review systematically summarizes the use of various cell types in urethral regeneration and their characteristics in recent years and discusses possible future directions of cell-based therapies.
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Affiliation(s)
- Yangwang Jin
- Department of Urology, Shanghai Sixth People’s Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai Eastern Institute of Urologic Reconstruction, Shanghai Jiao Tong University, Shanghai 200233, China; (Y.J.)
| | - Weixin Zhao
- Wake Forest Institute for Regenerative Medicine, Winston Salem, NC 27157, USA
| | - Ming Yang
- Department of Urology, Shanghai Sixth People’s Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai Eastern Institute of Urologic Reconstruction, Shanghai Jiao Tong University, Shanghai 200233, China; (Y.J.)
| | - Wenzhuo Fang
- Department of Urology, Shanghai Sixth People’s Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai Eastern Institute of Urologic Reconstruction, Shanghai Jiao Tong University, Shanghai 200233, China; (Y.J.)
| | - Guo Gao
- Key Laboratory for Thin Film and Micro Fabrication of the Ministry of Education, School of Sensing Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Ying Wang
- Department of Urology, Shanghai Sixth People’s Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai Eastern Institute of Urologic Reconstruction, Shanghai Jiao Tong University, Shanghai 200233, China; (Y.J.)
| | - Qiang Fu
- Department of Urology, Shanghai Sixth People’s Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai Eastern Institute of Urologic Reconstruction, Shanghai Jiao Tong University, Shanghai 200233, China; (Y.J.)
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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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