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Wang L, Yu M, Yang Y, Lv Y, Xie H, Chen J, Peng X, Peng Z, Zhou L, Wang Y, Huang Y, Chen F. Porous Photocrosslinkable Hydrogel Functionalized with USC Derived Small Extracellular Vesicles for Corpus Spongiosum Repair. Adv Healthc Mater 2024:e2304387. [PMID: 39036844 DOI: 10.1002/adhm.202304387] [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: 12/11/2023] [Revised: 06/21/2024] [Indexed: 07/23/2024]
Abstract
Reconstruction of a full-thickness spongy urethra is difficult because a corpus spongiosum (CS) defect cannot be repaired using self-healing or substitution urethroplasty. Small extracellular vesicles (sEVs) secreted by urine-derived stem cells (USC-sEVs) strongly promote vascular regeneration. In this study, it is aimed to explore whether USC-sEVs promote the repair of CS defects. To prolong the in vivo effects of USC-sEVs, a void-forming photoinduced imine crosslinking hydrogel (vHG) is prepared and mixed with the USC-sEV suspension. vHG encapsulated with USC-sEVs (vHG-sEVs) is used to repair a CS defect with length of 1.5 cm and width of 0.8 cm. The results show that vHG-sEVs promote the regeneration and repair of CS defects. Histological analysis reveals abundant sinusoid-like vascular structures in the vHG-sEV group. Photoacoustic microscopy indicates that blood flow and microvascular structure of the defect area in the vHG-sEV group are similar to those in the normal CS group. This study confirms that the in situ-formed vHG-sEV patch appears to be a valid and promising strategy for repairing CS defects.
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Affiliation(s)
- Lin Wang
- Department of Urology, Shanghai Children's Hospital, School of medicine, Shanghai Jiao Tong University, Shanghai, 200240, China
- Department of Urology, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, China
- Shanghai Eastern Institute of Urologic Reconstruction, Shanghai, 200233, China
- Department of Urology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Mingming Yu
- Department of Urology, Shanghai Children's Hospital, School of medicine, Shanghai Jiao Tong University, Shanghai, 200240, China
- Department of Ultrasound in Medicine, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, China
| | - Yunlong Yang
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, China
| | - Yiqing Lv
- Department of Urology, Shanghai Children's Hospital, School of medicine, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Hua Xie
- Department of Urology, Shanghai Children's Hospital, School of medicine, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Jiasheng Chen
- Department of Urology, Shanghai Children's Hospital, School of medicine, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Xufeng Peng
- Department of Urology, Shanghai Children's Hospital, School of medicine, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Zhiwei Peng
- Department of Urology, Shanghai Children's Hospital, School of medicine, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Lijun Zhou
- Department of Urology, Shanghai Children's Hospital, School of medicine, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Yang Wang
- Institute of Microsurgery on Extremities, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, China
| | - Yichen Huang
- Department of Urology, Shanghai Children's Hospital, School of medicine, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Fang Chen
- Department of Urology, Shanghai Children's Hospital, School of medicine, Shanghai Jiao Tong University, Shanghai, 200240, China
- Department of Urology, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, China
- Shanghai Eastern Institute of Urologic Reconstruction, Shanghai, 200233, China
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Cheng Q, Zhang L, Zhang J, Zhou X, Wu B, Wang D, Wei T, Shafiq M, Li S, Zhi D, Guan Y, Wang K, Kong D. Decellularized Scaffolds with Double-Layer Aligned Microchannels Induce the Oriented Growth of Bladder Smooth Muscle Cells: Toward Urethral and Ureteral Reconstruction. Adv Healthc Mater 2023; 12:e2300544. [PMID: 37638600 DOI: 10.1002/adhm.202300544] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 06/27/2023] [Indexed: 08/29/2023]
Abstract
There is a great clinical need for regenerating urinary tissue. Native urethras and ureters have bidirectional aligned smooth muscle cells (SMCs) layers, which plays a pivotal role in micturition and transporting urine and inhibiting reflux. Thus far, urinary scaffolds have not been designed to induce the native-mimicking aligned arrangement of SMCs. In this study, a tubular decellularized extracellular matrix (dECM) with an intact internal layer and bidirectional aligned microchannels in the tubular wall, which is realized by the subcutaneous implantation of a template, followed by the removal of the template, and decellularization, is engineered. The dense and intact internal layer effectively increases the leakage pressure of the tubular dECM scaffolds. Rat-derived dECM scaffolds with three different sizes of microchannels are fabricated by tailoring the fiber diameter of the templates. The rat-derived dECM scaffolds exhibiting microchannels of ≈65 µm show suitable mechanical properties, good ability to induce the bidirectional alignment and growth of human bladder SMCs, and elevated higher functional protein expression in vitro. These data indicate that rat-derived tubular dECM scaffolds manifesting double-layer aligned microchannels may be promising candidates to induce the native-mimicking regeneration of SMCs in urethra and ureter reconstruction.
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Affiliation(s)
- Quhan Cheng
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Linli Zhang
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Jingai Zhang
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Xin Zhou
- Department of Medical Imaging, Shanxi Medical University, Taiyuan, 030001, China
| | - Boyu Wu
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Dezheng Wang
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Tingting Wei
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Muhammad Shafiq
- Department of Chemical Engineering, Faculty of Engineering, Graduate School, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Shengbin Li
- Department of Urology, Tianjin Children's Hospital/Tianjin University Children's Hospital, Tianjin, 300134, China
| | - Dengke Zhi
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Yong Guan
- Department of Urology, Tianjin Children's Hospital/Tianjin University Children's Hospital, Tianjin, 300134, China
| | - Kai Wang
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Deling Kong
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, 300071, China
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López-Gutierrez J, Ramos-Payán R, Romero-Quintana JG, Ayala-Ham A, Castro-Salazar Y, Castillo-Ureta H, Jiménez-Gastélum G, Bermúdez M, Aguilar-Medina M. Evaluation of biocompatibility and angiogenic potential of extracellular matrix hydrogel biofunctionalized with the LL-37 peptide. Biomed Mater Eng 2023; 34:545-560. [PMID: 37393490 DOI: 10.3233/bme-230022] [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] [Indexed: 07/03/2023]
Abstract
BACKGROUND Biomaterials must allow revascularization for a successful tissue regeneration process. Biomaterials formulated from the extracellular matrix (ECM) have gained popularity in tissue engineering because of their superior biocompatibility, and due to their rheological properties, ECM-hydrogels can be easily applied in damaged areas, allowing cell colonization and integration into the host tissue. Porcine urinary bladder ECM (pUBM) retains functional signaling and structural proteins, being an excellent option in regenerative medicine. Even some small molecules, such as the antimicrobial cathelicidin-derived LL-37 peptide have proven angiogenic properties. OBJECTIVE The objective of this study was to evaluate the biocompatibility and angiogenic potential of an ECM-hydrogel derived from the porcine urinary bladder (pUBMh) biofunctionalized with the LL-37 peptide (pUBMh/LL37). METHODS Macrophages, fibroblasts, and adipose tissue-derived mesenchymal stem cells (AD-MSC) were exposed pUBMh/LL37, and the effect on cell proliferation was evaluated by MTT assay, cytotoxicity by quantification of lactate dehydrogenase release and the Live/Dead Cell Imaging assays. Moreover, macrophage production of IL-6, IL-10, IL-12p70, MCP-1, INF-γ, and TNF-α cytokines was quantified using a bead-based cytometric array. pUBMh/LL37 was implanted directly by dorsal subcutaneous injection in Wistar rats for 24 h to evaluate biocompatibility, and pUBMh/LL37-loaded angioreactors were implanted for 21 days for evaluation of angiogenesis. RESULTS We found that pUBMh/LL37 did not affect cell proliferation and is cytocompatible to all tested cell lines but induces the production of TNF-α and MCP-1 in macrophages. In vivo, this ECM-hydrogel induces fibroblast-like cell recruitment within the material, without tissue damage or inflammation at 48 h. Interestingly, tissue remodeling with vasculature inside angioreactors was seen at 21 days. CONCLUSIONS Our results showed that pUBMh/LL37 is cytologically compatible, and induces angiogenesis in vivo, showing potential for tissue regeneration therapies.
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Affiliation(s)
- Jorge López-Gutierrez
- Faculty of Biology, Autonomous University of Sinaloa, Josefa Ortiz de Domínguez s/n y Avenida de las Américas, Culiacan, Sinaloa, México
| | - Rosalío Ramos-Payán
- Faculty of Biological and Chemical Sciences, Autonomous University of Sinaloa, Josefa Ortiz de Domínguez s/n y Avenida de las Américas, Culiacan, Sinaloa, México
| | - Jose Geovanni Romero-Quintana
- Faculty of Biological and Chemical Sciences, Autonomous University of Sinaloa, Josefa Ortiz de Domínguez s/n y Avenida de las Américas, Culiacan, Sinaloa, México
| | - Alfredo Ayala-Ham
- Faculty of Odontology, Autonomous University of Sinaloa, Josefa Ortiz de Domínguez s/n y Avenida de las Américas, Culiacan, Sinaloa, México
| | - Yolanda Castro-Salazar
- Faculty of Odontology, Autonomous University of Sinaloa, Josefa Ortiz de Domínguez s/n y Avenida de las Américas, Culiacan, Sinaloa, México
| | - Hipolito Castillo-Ureta
- Faculty of Biology, Autonomous University of Sinaloa, Josefa Ortiz de Domínguez s/n y Avenida de las Américas, Culiacan, Sinaloa, México
| | - German Jiménez-Gastélum
- Faculty of Biology, Autonomous University of Sinaloa, Josefa Ortiz de Domínguez s/n y Avenida de las Américas, Culiacan, Sinaloa, México
| | - Mercedes Bermúdez
- Faculty of Odontology, Autonomous University of Chihuahua, Circuito Universitario Campus I, Chihuahua, Chihuahua, México
| | - Maribel Aguilar-Medina
- Faculty of Biological and Chemical Sciences, Autonomous University of Sinaloa, Josefa Ortiz de Domínguez s/n y Avenida de las Américas, Culiacan, Sinaloa, México
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Liu X, Wu K, Gao L, Wang L, Shi X. Biomaterial strategies for the application of reproductive tissue engineering. Bioact Mater 2022; 14:86-96. [PMID: 35310354 PMCID: PMC8892081 DOI: 10.1016/j.bioactmat.2021.11.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 11/13/2021] [Accepted: 11/22/2021] [Indexed: 02/06/2023] Open
Abstract
Human reproductive organs are of vital importance to the life of an individual and the reproduction of human populations. So far, traditional methods have a limited effect in recovering the function and fertility of reproductive organs and tissues. Thus, aim to replace and facilitate the regrowth of damaged or diseased tissue, various biomaterials are developed to offer hope to overcome these difficulties and help gain further research progress in reproductive tissue engineering. In this review, we focus on the biomaterials and their four main applications in reproductive tissue engineering: in vitro generation and culture of reproductive cells; development of reproductive organoids and models; in vivo transplantation of reproductive cells or tissues; and regeneration of reproductive tissue. In reproductive tissue engineering, designing biomaterials for different applications with different mechanical properties, structure, function, and microenvironment is challenging and important, and deserves more attention. Various biomaterials have been developed and used in reproductive tissue engineering. 3D culture systems can lead to better cell-cell interactions for in vitro production of reproductive cells. Reproductive organoids and models are formed by biomaterials to simulate the environment of natural reproductive organs. Biomaterials should promote vascular regeneration and resist inflammation for in-situ reproductive tissue regeneration.
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Tissue Engineering and Regenerative Medicine in Pediatric Urology: Urethral and Urinary Bladder Reconstruction. Int J Mol Sci 2022; 23:ijms23126360. [PMID: 35742803 PMCID: PMC9224288 DOI: 10.3390/ijms23126360] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 06/03/2022] [Accepted: 06/05/2022] [Indexed: 11/22/2022] Open
Abstract
In the case of pediatric urology there are several congenital conditions, such as hypospadias and neurogenic bladder, which affect, respectively, the urethra and the urinary bladder. In fact, the gold standard consists of a urethroplasty procedure in the case of urethral malformations and enterocystoplasty in the case of urinary bladder disorders. However, both surgical procedures are associated with severe complications, such as fistulas, urethral strictures, and dehiscence of the repair or recurrence of chordee in the case of urethroplasty, and metabolic disturbances, stone formation, urine leakage, and chronic infections in the case of enterocystoplasty. With the aim of overcoming the issue related to the lack of sufficient and appropriate autologous tissue, increasing attention has been focused on tissue engineering. In this review, both the urethral and the urinary bladder reconstruction strategies were summarized, focusing on pediatric applications and evaluating all the biomaterials tested in both animal models and patients. Particular attention was paid to the capability for tissue regeneration in dependence on the eventual presence of seeded cell and growth factor combinations in several types of scaffolds. Moreover, the main critical features needed for urinary tissue engineering have been highlighted and specifically focused on for pediatric application.
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Yang J, Zhu Z, Liu Y, Zheng Y, Xie Y, Lin J, Cai T. Double-Modified Bacterial Cellulose/Soy Protein Isolate Composites by Laser Hole Forming and Selective Oxidation Used for Urethral Repair. Biomacromolecules 2021; 23:291-302. [PMID: 34874163 DOI: 10.1021/acs.biomac.1c01268] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
In this study, a double-modified bacterial cellulose/soybean protein isolate (DMBC/SPI), a new type of urethral tissue engineering scaffold with good biocompatibility, biodegradability, and cell-oriented growth, was prepared. Bacterial cellulose (BC) was physically and chemically modified by laser hole forming and selective oxidation to obtain the double-modified bacterial cellulose (DMBC). The soybean protein isolate (SPI) was compounded on DMBC to obtain DMBC/SPI with better biocompatibility. DMBC/SPI was used to repair the damaged urethra in rabbits. The results showed that DMBC/SPI was beneficial to heal the damaged urethra and did not cause a milder inflammatory response. The repaired urethra was smooth and continuous. DMBC/SPI has a good urethral repair effect and is expected to be used as a new urethral reconstruction material in clinical applications. In addition, FT-IR spectroscopy, SEM, static contact angle measurements, mechanical property investigation, and cell experiments were also performed to characterize the properties of DMBC/SPI composites.
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Affiliation(s)
- Jiayu Yang
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Zhenpeng Zhu
- Department of Urology, Peking University First Hospital, Beijing 100034, China
| | - Yang Liu
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Yudong Zheng
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Yajie Xie
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Jian Lin
- Department of Urology, Peking University First Hospital, Beijing 100034, China
| | - Tianyu Cai
- Department of Urology, Peking University First Hospital, Beijing 100034, China
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Abbas TO, Elawad A, Pullattayil S. AK, Pennisi CP. Quality of Reporting in Preclinical Urethral Tissue Engineering Studies: A Systematic Review to Assess Adherence to the ARRIVE Guidelines. Animals (Basel) 2021; 11:2456. [PMID: 34438913 PMCID: PMC8388767 DOI: 10.3390/ani11082456] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 08/13/2021] [Accepted: 08/17/2021] [Indexed: 01/12/2023] Open
Abstract
Preclinical research within the area of urethral tissue engineering has not yet been successfully translated into an efficient therapeutic option for patients. This gap could be attributed, in part, to inadequate design and reporting of the studies employing laboratory animals. In this study, a systematic review was conducted to investigate the quality of reporting in preclinical studies utilizing tissue engineering approaches for urethral repair. The scope was on studies performed in rabbits, published between January 2014 and March 2020. Quality assessment of the data was conducted according to the Animal Research: Reporting of in Vivo Experiments (ARRIVE) guidelines by the scoring of a 38-item checklist in different categories. A total of 28 articles that fulfilled the eligibility criteria were included in the study. The range of ARRIVE score was from 0 to 100, taking into consideration having reported the item in question or not. The mean checklist score was 53%. The items that attained the highest scores included the number of animals utilized, the size of control and experimental groups, and the definition of experimental outcomes. The least frequently reported items included the data regarding the experimental procedure, housing and husbandry, determination and justification of the number of animals, and reporting of adverse events. Surprisingly, full disclosure about ethical guidelines and animal protocol approval was missing in 54% of the studies. No paper stated the sample size estimation. Overall, our study found that a large number of studies display inadequate reporting of fundamental information and that the quality of reporting improved marginally over the study period. We encourage a comprehensive implementation of the ARRIVE guidelines in animal studies exploring tissue engineering for urethral repair, not only to facilitate effective translation of preclinical research findings into clinical therapies, but also to ensure compliance with ethical principles and to minimize unnecessary animal studies.
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Affiliation(s)
- Tariq O. Abbas
- Regenerative Medicine Research Group, Department of Health Science and Technology, Aalborg University, 9220 Aalborg, Denmark;
- Pediatric Urology Section, Sidra Medicine, Doha 26999, Qatar;
- College of Medicine, Qatar University, Doha 2713, Qatar
- Weill Cornell Medicine Qatar, Doha 24144, Qatar
| | - Abubakr Elawad
- Pediatric Urology Section, Sidra Medicine, Doha 26999, Qatar;
| | | | - Cristian Pablo Pennisi
- Regenerative Medicine Research Group, Department of Health Science and Technology, Aalborg University, 9220 Aalborg, Denmark;
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Genitourinary Tissue Engineering: Reconstruction and Research Models. Bioengineering (Basel) 2021; 8:bioengineering8070099. [PMID: 34356206 PMCID: PMC8301202 DOI: 10.3390/bioengineering8070099] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 06/28/2021] [Accepted: 07/06/2021] [Indexed: 01/15/2023] Open
Abstract
Tissue engineering is an emerging field of research that initially aimed to produce 3D tissues to bypass the lack of adequate tissues for the repair or replacement of deficient organs. The basis of tissue engineering protocols is to create scaffolds, which can have a synthetic or natural origin, seeded or not with cells. At the same time, more and more studies have indicated the low clinic translation rate of research realised using standard cell culture conditions, i.e., cells on plastic surfaces or using animal models that are too different from humans. New models are needed to mimic the 3D organisation of tissue and the cells themselves and the interaction between cells and the extracellular matrix. In this regard, urology and gynaecology fields are of particular interest. The urethra and vagina can be sites suffering from many pathologies without currently adequate treatment options. Due to the specific organisation of the human urethral/bladder and vaginal epithelium, current research models remain poorly representative. In this review, the anatomy, the current pathologies, and the treatments will be described before focusing on producing tissues and research models using tissue engineering. An emphasis is made on the self-assembly approach, which allows tissue production without the need for biomaterials.
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Vasyutin I, Butnaru D, Lyundup A, Timashev P, Vinarov A, Kuznetsov S, Atala A, Zhang Y. Frontiers in urethra regeneration: current state and future perspective. Biomed Mater 2021; 16. [PMID: 32503009 DOI: 10.1088/1748-605x/ab99d2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Accepted: 06/05/2020] [Indexed: 12/13/2022]
Abstract
Despite the positive achievements attained, the treatment of male urethral strictures and hypospadiases still remains a challenge, particularly in cases of severe urethral defects. Complications and the need for additional interventions in such cases are common. Also, shortage of autologous tissue for graft harvesting and significant morbidity in the location of harvesting present problems and often lead to staged treatment. Tissue engineering provides a promising alternative to the current sources of grafts for urethroplasty. Since the first experiments in urethral substitution with tissue engineered grafts, this topic in regenerative medicine has grown remarkably, as many different types of tissue-engineered grafts and approaches in graft design have been suggested and testedin vivo. However, there have been only a few clinical trials of tissue-engineered grafts in urethral substitution, involving hardly more than a hundred patients overall. This indicates that the topic is still in its inception, and the search for the best graft design is continuing. The current review focuses on the state of the art in urethral regeneration with tissue engineering technology. It gives a comprehensive overview of the components of the tissue-engineered graft and an overview of the steps in graft development. Different cell sources, types of scaffolds, assembling approaches, options for vascularization enhancement and preclinical models are considered.
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Affiliation(s)
- Igor Vasyutin
- Sechenov University, 8-2 Trubetskaya str., Moscow 119991, Russia
| | - Denis Butnaru
- Sechenov University, 8-2 Trubetskaya str., Moscow 119991, Russia
| | - Alexey Lyundup
- Sechenov University, 8-2 Trubetskaya str., Moscow 119991, Russia
| | - Peter Timashev
- Sechenov University, 8-2 Trubetskaya str., Moscow 119991, Russia
| | - Andrey Vinarov
- Sechenov University, 8-2 Trubetskaya str., Moscow 119991, Russia
| | - Sergey Kuznetsov
- Sechenov University, 8-2 Trubetskaya str., Moscow 119991, Russia
| | - Anthony Atala
- Wake Forest Institute for Regenerative Medicine, 391 Technology Way NE, Winston-Salem, NC 27101, United States of America
| | - Yuanyuan Zhang
- Sechenov University, 8-2 Trubetskaya str., Moscow 119991, Russia.,Wake Forest Institute for Regenerative Medicine, 391 Technology Way NE, Winston-Salem, NC 27101, United States of America
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10
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Albersheim J, Smith DW, Pariser JJ, Dahm P. The reporting quality of randomized controlled trials and experimental animal studies for urethroplasty. World J Urol 2020; 39:2677-2683. [PMID: 33175208 DOI: 10.1007/s00345-020-03501-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Accepted: 10/14/2020] [Indexed: 12/31/2022] Open
Abstract
OBJECTIVES To assess the reporting quality of randomized controlled trials and experimental animal studies examining urethroplasty in reconstructive urological surgery literature. METHODS We performed a comprehensive literature search to identify all urethroplasty-related RCTs examining humans as well as animal models. We used the Consolidated Standards of Reporting Trials (CONSORT) and the Animals in Research: Reporting in vivo Experiments (ARRIVE) guidelines to assess reporting quality. Two reviewers performed data abstraction independently and in duplicate. We then generated descriptive statistics including CONSORT (0-25) and ARRIVE (0-20) summary scores using the median and interquartile range. RESULTS Twenty studies were ultimately included; 14 randomized controlled trials and 6 experimental animal studies. All studies were two-armed, parallel group studies. Median sample sizes (and interquartile range) of the human and animal studies were 48.5 (31.8-53.8) and 18 (15.3-27.5), respectively. The median CONSORT and ARRIVE scores were 10.0 (8.75-12.63) and 7.97 (6.79-8.64), respectively. Human randomized controlled trials did not consistently report the method of allocation concealment (6/14; 42.9%), blinding (2/14; 14.3%), or discuss the generalizability of the results (6/14; 42.9%). Animal studies infrequently reported why a given animal model was used (1/6; 16.7%), how they were allocated to groups (0/6; 0%) or what the experimental primary and secondary outcomes were (0/6; 0%). CONCLUSIONS Urethroplasty literature is marked by a paucity of both randomized controlled trials and experimental design animal studies. The existing studies are inconsistently reported and are therefore of uncertain methodological quality.
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Affiliation(s)
- Jacob Albersheim
- Urology Section, Minneapolis VA Health Care System, 112D, One Veterans Drive, Minneapolis, MN, 55417, USA.,Department of Urology, University of Minnesota, Minneapolis, MN, USA
| | - Daniel W Smith
- Urology Section, Minneapolis VA Health Care System, 112D, One Veterans Drive, Minneapolis, MN, 55417, USA.,Department of Urology, University of Minnesota, Minneapolis, MN, USA
| | - Joseph J Pariser
- Department of Urology, University of Minnesota, Minneapolis, MN, USA
| | - Philipp Dahm
- Urology Section, Minneapolis VA Health Care System, 112D, One Veterans Drive, Minneapolis, MN, 55417, USA. .,Department of Urology, University of Minnesota, Minneapolis, MN, USA.
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11
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Wang L, Yu M, Peng X, Wang Y, Chen F. Assessing the potential regeneration ability of corpus spongiosum in rabbit models. Andrologia 2020; 53:e13901. [PMID: 33141934 DOI: 10.1111/and.13901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 09/30/2020] [Accepted: 10/19/2020] [Indexed: 11/30/2022] Open
Abstract
Most congenital or acquired urethral diseases are usually accompanied by corpus spongiosum (CS) defects. However, Substitution urethroplasty can only reconstruct urethral lumen, not the CS. Many long-term complications occur due to the lack of protection from CS. Is CS a kind of tissue that cannot be repaired by regeneration and self-healing? In this study, the CS defect with urethral mucosa intact model was established in rabbits by removing the ventral CS tissue. Based on this model, three groups of different CS defect sizes, with lengths of 0.5 cm (Group A), 1.0 cm (Group B) and 1.5 cm (Group C), were then constructed, respectively, to assess the potential regeneration ability of CS. Three months later, the entire urethra, including the CS defect, was assessed by histological staining. Results showed that the vascular sinusoids were completely removed from urethral mucosa. The rabbit model of CS defect was established successfully. Three months post-operatively, the CS defects in all the 3 groups were replaced by disordered collagen instead of regenerating typical sinusoid-like vascular structure, which is significantly different from the normal CS rich in vascular sinusoids. The CS defects could not be repaired through self-healing. The potential regeneration ability of CS is extremely poor.
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Affiliation(s)
- Lin Wang
- Department of Urology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Mingming Yu
- Department of Urology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Xufeng Peng
- Department of Urology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Yang Wang
- Institute of Microsurgery on Extremities, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Fang Chen
- Department of Urology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, China.,Department of Urology, Shanghai Jiaotong University Affiliated Sixth People's Hospital, Shanghai, China.,Shanghai Eastern Institute of Urologic Reconstruction, Shanghai, China
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12
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Mackiewicz AG, Klekiel T, Kurowiak J, Piasecki T, Bedzinski R. Determination of Stent Load Conditions in New Zealand White Rabbit Urethra. J Funct Biomater 2020; 11:jfb11040070. [PMID: 32992694 PMCID: PMC7712058 DOI: 10.3390/jfb11040070] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 09/17/2020] [Accepted: 09/21/2020] [Indexed: 12/18/2022] Open
Abstract
Background: Frequency of urethral stenosis makes it necessary to develop new innovative methods of treating this disease. This pathology most often occurs in men and manifests itself in painful urination, reduced urine flow, or total urinary retention. This is a condition that requires immediate medical intervention. Methods: Experimental tests were carried out on a rabbit in order to determine the changes of pressure in the urethra system and to estimate the velocity of urine flow. For this purpose, a measuring system was proposed to measure the pressure of a fluid-filled urethra. A fluoroscope was used to observe the deformability of the bladder and urethra canal. Results: Based on these tests, the range of changes in the urethra tube diameter, the pressures inside the system, and the flow velocity during micturition were determined. Conclusions: The presented studies allowed determining the behavior of the urethra under the conditions of urinary filling. The fluid-filled bladder and urethra increased their dimensions significantly. Such large changes require that the stents used for the treatment of urethral stenosis should not have a fixed diameter but should adapt to changing urethral dimensions.
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Affiliation(s)
- Agnieszka G. Mackiewicz
- Department of Biomedical Engineering, Institute of Material and Biomedical Engineering, University of Zielona Gora, Licealna 9 Street, 65-417 Zielona Gora, Poland; (T.K.); (J.K.); (R.B.)
- Correspondence:
| | - Tomasz Klekiel
- Department of Biomedical Engineering, Institute of Material and Biomedical Engineering, University of Zielona Gora, Licealna 9 Street, 65-417 Zielona Gora, Poland; (T.K.); (J.K.); (R.B.)
| | - Jagoda Kurowiak
- Department of Biomedical Engineering, Institute of Material and Biomedical Engineering, University of Zielona Gora, Licealna 9 Street, 65-417 Zielona Gora, Poland; (T.K.); (J.K.); (R.B.)
| | - Tomasz Piasecki
- Department of Epizootiology and Clinic of Birds and Exotic Animals, Faculty of Veterinary Medicine, Wroclaw University of Environmental and Life Sciences, C. K. Norwida 25 Street, 50-375 Wroclaw, Poland;
| | - Romuald Bedzinski
- Department of Biomedical Engineering, Institute of Material and Biomedical Engineering, University of Zielona Gora, Licealna 9 Street, 65-417 Zielona Gora, Poland; (T.K.); (J.K.); (R.B.)
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13
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Liu Y, Huang L, Yuan W, Zhang D, Gu Y, Huang J, Murphy S, Ali M, Zhang Y, Song L. Sustained release of stromal cell-derived factor-1 alpha from silk fibroin microfiber promotes urethral reconstruction in rabbits. J Biomed Mater Res A 2020; 108:1760-1773. [PMID: 32276293 DOI: 10.1002/jbm.a.36943] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 03/10/2020] [Accepted: 03/18/2020] [Indexed: 12/18/2022]
Abstract
We developed a stromal cell-derived factor-1 alpha (SDF-1α)-aligned silk fibroin (SF)/three-dimensional porous bladder acellular matrix graft (3D-BAMG) composite scaffold for long-section ventral urethral regeneration and repair in vivo. SDF-1α-aligned SF microfiber/3D-BAMG, aligned SF microfiber/3D-BAMG, and nonaligned SF microfiber/3D-BAMG scaffolds were prepared using electrostatic spinning and wet processing. Adipose-derived stem cell (ADSC) and bone marrow stromal cell (BMSC) migration was assessed in the SDF-1α-loaded scaffolds. Sustained SDF-1α release in vitro and vivo was analyzed using enzyme-linked immunosorbent assay (ELISA) and western blotting, respectively. The scaffolds were used to repair a 1.5 × 1 cm2 ventral urethral defect in male rabbits in vivo. General observation and retrograde urinary tract contrast assessment were used to examine urethral lumen patency and continuity at 1 and 3 months post-surgery. Postoperative rehabilitation was evaluated using histological detection. The composite scaffolds sustained SDF-1α release for over 16 days in vitro. SDF-1α-aligned SF nanofiber promoted regeneration of urethral mucosa, submucosal smooth muscles, and microvasculature, increased cellular proliferation, and reduced collagen deposition. SDF-1α expression was increased in reconstructed urethra at 3 months post-surgery in SDF-1α-aligned SF group. SDF-1α-aligned SF microfiber/3D-BAMG scaffolds may be used to repair and reconstruct long urethral defects because they accelerate urethral regeneration.
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Affiliation(s)
- Yang Liu
- Department of Urology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China.,Shanghai Eastern Institute of Urologic Reconstruction, Shanghai, China.,Department of Urology, Weifang People's Hospital, Weifang Medical University, Weifang, Shandong, China
| | - Li Huang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, China
| | - Wei Yuan
- Department of Urology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China.,Shanghai Eastern Institute of Urologic Reconstruction, Shanghai, China.,Department of Urology, Weifang People's Hospital, Weifang Medical University, Weifang, Shandong, China.,State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, China
| | - Dongliang Zhang
- Department of Urology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Yubo Gu
- Department of Urology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Jianwen Huang
- Department of Urology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Sean Murphy
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, North Carolina
| | - Mohamed Ali
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, North Carolina.,Department of Chemistry, Faculty of Science, Zagazig University, Zagazig, Egypt
| | - Yaopeng Zhang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, China
| | - Lujie Song
- Department of Urology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
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14
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Use of Acellular Dermal Matrix for Urethroplasty Coverage in Proximal Hypospadias Repair: a Pilot Study. Adv Ther 2020; 37:1425-1435. [PMID: 32062814 PMCID: PMC7140736 DOI: 10.1007/s12325-020-01254-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Indexed: 12/26/2022]
Abstract
Introduction The complication rates of proximal hypospadias, especially fistula, are much higher than those of distal hypospadias. Urethral coverage is an effective method for reducing fistulas. Acellular dermal matrix (ADM) has been shown to exhibit structural compatibility and biocompatibility, both of which promote tissue healing. Methods The present non-randomized study evaluated the efficiency, feasibility, and safety of using ADM for urethroplasty coverage in patients with proximal hypospadias. This prospective study enrolled 35 patients (age range 15–60 months) with proximal hypospadias who underwent operation between September 2018 and March 2019 at Beijing Children’s Hospital (Beijing, China). Urethroplasties were performed by the transverse preputial island flap (TPIF) technique. ADM was applied and sutured over the urethroplasty as an additional covering layer. Patient outcomes were compared with those of 80 non-matched control patients with proximal hypospadias who underwent the same procedure, with dartos as a covering layer. Results During a median follow-up of 11.56 months (range 9–15 months), urethral fistula occurred in six patients (17.1%) in the ADM group and 28 patients (35%) in the dartos group. Superficial wound infection was observed in six patients (17.1%) in the ADM group and 10 patients (12.5%) in the dartos group. One patient in the ADM group had diverticulum, compared with five patients (6.25%) in the dartos group. Meatal stenosis and urethral stricture were observed in four patients (11.4%) in the ADM group and six patients (7.5%) in the dartos group; all of these complications were treated conservatively. No glans dehiscence was observed in either group. Conclusion Use of ADM may be a safe and efficient covering technique to provide an additional coverage layer for proximal hypospadias repair, thereby reducing the incidence of fistula formation, especially among patients who have poor-quality covering materials.
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15
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Fan S, Chen K, Yuan W, Zhang D, Yang S, Lan P, Song L, Shao H, Zhang Y. Biomaterial-Based Scaffolds as Antibacterial Suture Materials. ACS Biomater Sci Eng 2020; 6:3154-3161. [DOI: 10.1021/acsbiomaterials.0c00104] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Suna Fan
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Shanghai Belt and Road Joint Laboratory of Advanced Fiber and Low-Dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, P. R. China
| | - Kai Chen
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Shanghai Belt and Road Joint Laboratory of Advanced Fiber and Low-Dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, P. R. China
| | - Wei Yuan
- Department of Urology, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai 200233, P. R. China
| | - Dongliang Zhang
- Department of Urology, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai 200233, P. R. China
| | - Siqing Yang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Shanghai Belt and Road Joint Laboratory of Advanced Fiber and Low-Dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, P. R. China
| | - Ping Lan
- Key Laboratory of Yarn Materials Forming and Composite Processing Technology of Zhejiang Province, Jiaxing College, Jiaxing, 314001, P.R. China
| | - Lujie Song
- Department of Urology, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai 200233, P. R. China
| | - Huili Shao
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Shanghai Belt and Road Joint Laboratory of Advanced Fiber and Low-Dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, P. R. China
| | - Yaopeng Zhang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Shanghai Belt and Road Joint Laboratory of Advanced Fiber and Low-Dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, P. R. China
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16
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The current state of tissue engineering in the management of hypospadias. Nat Rev Urol 2020; 17:162-175. [DOI: 10.1038/s41585-020-0281-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/06/2020] [Indexed: 12/20/2022]
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17
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Wang B, Lv X, Li Z, Zhang M, Yao J, Sheng N, Lu M, Wang H, Chen S. Urethra-inspired biomimetic scaffold: A therapeutic strategy to promote angiogenesis for urethral regeneration in a rabbit model. Acta Biomater 2020; 102:247-258. [PMID: 31734410 DOI: 10.1016/j.actbio.2019.11.026] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Revised: 11/11/2019] [Accepted: 11/12/2019] [Indexed: 12/21/2022]
Abstract
Limited angiogenesis and epithelialization make urethral regeneration using conventional tissue-engineered grafts a great challenge. Consequently, inspired from the native urethra, bacterial cellulose (BC) and bladder acellular matrix (BAM) were combined to design a three dimensional (3D) biomimetic scaffold. The developed BC/BAM scaffold was engineered for accelerating urethral regeneration by enhancing angiogenesis and epithelialization. The BC/BAM scaffold reveals the closest mimic of native urethra in terms of the 3D porous nanofibrous structure and component including collagen, glycosaminoglycans, and intrinsic vascular endothelial growth factor (VEGF). In vitro studies showed that the bioinspired BC/BAM scaffold promoted in vitro angiogenesis by facilitating human umbilical vein endothelial cells (HUVECs) growth, expression of endothelial function related proteins and capillary-like tube formation. Effect of the BC/BAM scaffold on angiogenesis and epithelialization was studied by its implantation in a rabbit urethral defect model for 1 and 3 months. Results demonstrated that the improved blood vessels formation in the urethra-inspired BC/BAM scaffold significantly promoted epithelialization and accelerated urethral regeneration. The urethra-inspired BC/BAM scaffold provides us a new design approach to construct grafts for urethral regeneration. STATEMENT OF SIGNIFICANCE: Findings in urethral regeneration demonstrate that an ideal tissue-engineered urethra should have adequate angiogenesis to support epithelialization for urethral regeneration in vivo. In this study, inspired from the native urethra, a bioinspired bacterial cellulose/bladder acellular matrix (BC/BAM) scaffold was developed to promote angiogenesis and epithelialization. The designed scaffold showed the closest physical structure and component to natural urethra, which is beneficial to angiogenesis and regeneration of urethral epithelium. This is the first time to utilize BC and dissolved BAM to develop biomimetic scaffold in urethral tissue engineering. Our biomimetic strategy on urethra graft design provided enhanced angiogenesis and epithelialization to achieve an accelerated and successful rabbit urethral repair. We believe that our urethra-inspired biomimetic scaffold would provide new insights into the design of urethral tissue engineering grafts.
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18
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Pederzoli F, Joice G, Salonia A, Bivalacqua TJ, Sopko NA. Regenerative and engineered options for urethroplasty. Nat Rev Urol 2019; 16:453-464. [PMID: 31171866 DOI: 10.1038/s41585-019-0198-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/04/2019] [Indexed: 02/07/2023]
Abstract
Surgical correction of urethral strictures by substitution urethroplasty - the use of grafts or flaps to correct the urethral narrowing - remains one of the most challenging procedures in urology and is frequently associated with complications, restenosis and poor quality of life for the affected individual. Tissue engineering using different cell types and tissue scaffolds offers a promising alternative for tissue repair and replacement. The past 30 years of tissue engineering has resulted in the development of several therapies that are now in use in the clinic, especially in treating cutaneous, bone and cartilage defects. Advances in tissue engineering for urethral replacement have resulted in several clinical applications that have shown promise but have not yet become the standard of care.
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Affiliation(s)
- Filippo Pederzoli
- Division of Experimental Oncology/Unit of Urology, URI, IRCCS Ospedale San Raffaele, Milan, Italy
- Department of Urology, James Buchanan Brady Urological Institute, Johns Hopkins Medical Institutions, Baltimore, MD, USA
- Università Vita-Salute San Raffaele, Milan, Italy
| | - Gregory Joice
- Department of Urology, James Buchanan Brady Urological Institute, Johns Hopkins Medical Institutions, Baltimore, MD, USA
| | - Andrea Salonia
- Division of Experimental Oncology/Unit of Urology, URI, IRCCS Ospedale San Raffaele, Milan, Italy
- Università Vita-Salute San Raffaele, Milan, Italy
| | - Trinity J Bivalacqua
- Department of Urology, James Buchanan Brady Urological Institute, Johns Hopkins Medical Institutions, Baltimore, MD, USA
| | - Nikolai A Sopko
- Department of Urology, James Buchanan Brady Urological Institute, Johns Hopkins Medical Institutions, Baltimore, MD, USA.
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19
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Abbas TO, Yalcin HC, Pennisi CP. From Acellular Matrices to Smart Polymers: Degradable Scaffolds that are Transforming the Shape of Urethral Tissue Engineering. Int J Mol Sci 2019; 20:E1763. [PMID: 30974769 PMCID: PMC6479944 DOI: 10.3390/ijms20071763] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 03/29/2019] [Accepted: 04/02/2019] [Indexed: 12/24/2022] Open
Abstract
Several congenital and acquired conditions may result in severe narrowing of the urethra in men, which represent an ongoing surgical challenge and a significant burden on both health and quality of life. In the field of urethral reconstruction, tissue engineering has emerged as a promising alternative to overcome some of the limitations associated with autologous tissue grafts. In this direction, preclinical as well as clinical studies, have shown that degradable scaffolds are able to restore the normal urethral architecture, supporting neo-vascularization and stratification of the tissue. While a wide variety of degradable biomaterials are under scrutiny, such as decellularized matrices, natural, and synthetic polymers, the search for scaffold materials that could fulfill the clinical performance requirements continues. In this article, we discuss the design requirements of the scaffold that appear to be crucial to better resemble the structural, physical, and biological properties of the native urethra and are expected to support an adequate recovery of the urethral function. In this context, we review the biological performance of the degradable polymers currently applied for urethral reconstruction and outline the perspectives on novel functional polymers, which could find application in the design of customized urethral constructs.
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Affiliation(s)
- Tariq O Abbas
- Laboratory for Stem Cell Research, Department of Health Science and Technology, Aalborg University, 9220 Aalborg, Denmark.
- Pediatric Surgery Department, Hamad General Hospital, 3050 Doha, Qatar.
- College of Medicine, Qatar University, 2713 Doha, Qatar.
- Surgery Department, Weill Cornell Medicine⁻Qatar, 24144 Doha, Qatar.
| | | | - Cristian P Pennisi
- Laboratory for Stem Cell Research, Department of Health Science and Technology, Aalborg University, 9220 Aalborg, Denmark.
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20
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Liu W, Cao N, Fan S, Zhang H, Shao H, Song L, Cao C, Huang J, Zhang Y. Angiogenesis Potential of Bladder Acellular Matrix Hydrogel by Compounding Endothelial Cells. ACS APPLIED BIO MATERIALS 2019; 2:1158-1167. [DOI: 10.1021/acsabm.8b00760] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Wenjing Liu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, International Joint Laboratory for Advanced Fiber and Low-Dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, P. R. China
| | - Nailong Cao
- Department of Urology, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai 200233, P. R. China
| | - Suna Fan
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, International Joint Laboratory for Advanced Fiber and Low-Dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, P. R. China
| | - Huihui Zhang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, International Joint Laboratory for Advanced Fiber and Low-Dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, P. R. China
| | - Huili Shao
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, International Joint Laboratory for Advanced Fiber and Low-Dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, P. R. China
| | - Lujie Song
- Department of Urology, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai 200233, P. R. China
- Shanghai Eastern
Institute of Urologic Reconstruction, Shanghai 200233, P. R. China
| | - Chengbo Cao
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P. R. China
- School of Chemistry and Chemical Engineering, YanTai University, YanTai 264005, P. R. China
| | - Jianwen Huang
- Department of Urology, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai 200233, P. R. China
- Shanghai Eastern
Institute of Urologic Reconstruction, Shanghai 200233, P. R. China
| | - Yaopeng Zhang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, International Joint Laboratory for Advanced Fiber and Low-Dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, P. R. China
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21
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Cao N, Song L, Liu W, Fan S, Jiang D, Mu J, Gu B, Xu Y, Zhang Y, Huang J. Prevascularized bladder acellular matrix hydrogel/silk fibroin composite scaffolds promote the regeneration of urethra in a rabbit model. Biomed Mater 2018; 14:015002. [DOI: 10.1088/1748-605x/aae5e2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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22
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Zou Q, Fu Q. Tissue engineering for urinary tract reconstruction and repair: Progress and prospect in China. Asian J Urol 2017; 5:57-68. [PMID: 29736367 PMCID: PMC5934513 DOI: 10.1016/j.ajur.2017.06.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Revised: 03/10/2017] [Accepted: 04/25/2017] [Indexed: 12/11/2022] Open
Abstract
Several urinary tract pathologic conditions, such as strictures, cancer, and obliterations, require reconstructive plastic surgery. Reconstruction of the urinary tract is an intractable task for urologists due to insufficient autologous tissue. Limitations of autologous tissue application prompted urologists to investigate ideal substitutes. Tissue engineering is a new direction in these cases. Advances in tissue engineering over the last 2 decades may offer alternative approaches for the urinary tract reconstruction. The main components of tissue engineering include biomaterials and cells. Biomaterials can be used with or without cultured cells. This paper focuses on cell sources, biomaterials, and existing methods of tissue engineering for urinary tract reconstruction in China. The paper also details challenges and perspectives involved in urinary tract reconstruction.
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Affiliation(s)
- Qingsong Zou
- Department of Urology, Affiliated Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Qiang Fu
- Department of Urology, Affiliated Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai, China
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Yapici AK, Uguz S, Bayram Y, Sari S, Karslioglu Y, Guven A, Ozturk S. Use of a fibrovascular tube in creation of neo-urethra during penile reconstruction. J Pediatr Urol 2017; 13:273.e1-273.e8. [PMID: 28262534 DOI: 10.1016/j.jpurol.2016.12.026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Accepted: 12/15/2016] [Indexed: 11/26/2022]
Abstract
INTRODUCTION There are several techniques employed in the surgical treatment of total or partial penile reconstruction, hypospadias surgery, and urethral stricture. Urethral reconstruction is performed in different ways applying these techniques. OBJECTIVE We evaluated use of a fibrovascular sheath to create a neo-urethra formed around a silicon tube. MATERIAL AND METHODS We used nine male New Zealand rabbits for this study. In the first step, we placed a silicone tube under the skin in the lower abdomen of the rabbits and waited for the formation of a fibrovascular sheath to totally surround the tube. In the second step, the silicone tube was removed and the formed fibrovascular sheath was anastomosed with penile urethra over a silicone 8F Foley catheter. Ten days after the second step, the silicone Foley catheter was removed. Twenty days after the second step, we evaluated the newly created neo-urethra with a retrograde urethrogram. Thirty days after the second step, the rabbits were sacrificed and the bladder, urethra, and neo-urethra were removed for histopathological examination. RESULTS Six of the rabbits completed the study. After the first operation, in the third month, formation of the fibrovascular sheath was observed around the silicon tube. After anastomosis and removal of the silicon Foley catheter, urine was seen to pass through the neo-urethral meatus. Urethrocystography showed that the neo-urethra and penile urethra were aligned and urine flow was regular. Histopathological evaluation showed that the structural integrity of the newly formed urethra was comparable with the structure of the regular urethra (Table) and the calibration did not change over time, although the newly formed urethra was not covered with uroepithelium. CONCLUSIONS In this study, we achieved promising results with use of a newly formed fibrovascular sheath as a neo-urethra.
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Affiliation(s)
- Abdul Kerim Yapici
- Department of Plastic, Reconstructive and Aesthetic Surgery, Gulhane Military Medical Academy, Ankara, Turkey.
| | - Sami Uguz
- Department of Urology, Gulhane Military Medical Academy, Ankara, Turkey
| | - Yalcin Bayram
- Department of Plastic, Reconstructive and Aesthetic Surgery, Gulhane Military Medical Academy, Ankara, Turkey
| | - Sebahattin Sari
- Department of Radiology, Gulhane Military Medical Academy, Ankara, Turkey
| | | | - Ahmet Guven
- Department of Pediatric Surgery, Gulhane Military Medical Academy, Ankara, Turkey
| | - Serdar Ozturk
- Department of Plastic, Reconstructive and Aesthetic Surgery, Gulhane Military Medical Academy, Ankara, Turkey
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Liu Y, Ma W, Liu B, Wang Y, Chu J, Xiong G, Shen L, Long C, Lin T, He D, Butnaru D, Alexey L, Zhang Y, Zhang D, Wei G. Urethral reconstruction with autologous urine-derived stem cells seeded in three-dimensional porous small intestinal submucosa in a rabbit model. Stem Cell Res Ther 2017; 8:63. [PMID: 28279224 PMCID: PMC5345143 DOI: 10.1186/s13287-017-0500-y] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2016] [Revised: 12/31/2016] [Accepted: 02/09/2017] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Urethral reconstruction is one of the great surgical challenges for urologists. A cell-based tissue-engineered urethra may be an alternative for patients who have complicated long strictures and need urethral reconstruction. Here, we demonstrated the feasibility of using autologous urine-derived stem cells (USCs) seeded on small intestinal submucosa (SIS) to repair a urethral defect in a rabbit model. METHODS Autologous USCs were obtained and characterized, and their capacity to differentiate into urothelial cells (UCs) and smooth muscle cells (SMCs) was tested. Then, USCs were labeled with PKH67, seeded on SIS, and transplanted to repair a urethral defect. The urethral defect model was surgically established in New Zealand white male rabbits. A ventral urethral gap was created, and the urethral mucosa was completely removed, with a mean rabbit penile urethra length of 2 cm. The urethral mucosal defect was repaired with a SIS scaffold (control group: SIS with no USCs; experimental group: autologous USC-seeded SIS; n = 12 for each group). A series of tests, including a retrograde urethrogram, histological analysis, and immunofluorescence, was undertaken 2, 3, 4, and 12 weeks after the operation to evaluate the effect of the autologous USCs on urethral reconstruction. RESULTS Autologous USCs could be easily collected and induced to differentiate into UCs and SMCs. In addition, the urethral caliber, speed of urothelial regeneration, content of smooth muscle, and vessel density were significantly improved in the group with autologous USC-seeded SIS. Moreover, inflammatory cell infiltration and fibrosis were found in the control group with only SIS, but not in the experimental autologous USC-seeded SIS group. Furthermore, immunofluorescence staining demonstrated that the transplanted USCs differentiated into UCs and SMCs in vivo. CONCLUSIONS Autologous USCs can be used as an alternative cell source for cell-based tissue engineering for urethral reconstruction.
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Affiliation(s)
- Yang Liu
- Department of Urology, Children’s Hospital of Chongqing Medical University, Chongqing, 400014 China
- Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, China International Science and Technology Cooperation base of Child development and Critical Disorders, Chongqing Key Laboratory of Child Urogenital Development and Tissue Engineering, Chongqing, 400014 China
| | - Wenjun Ma
- Department of Urology, Children’s Hospital of Chongqing Medical University, Chongqing, 400014 China
- Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, China International Science and Technology Cooperation base of Child development and Critical Disorders, Chongqing Key Laboratory of Child Urogenital Development and Tissue Engineering, Chongqing, 400014 China
- Chongqing Engineering Research Center of Stem Cell Therapy, Children’s Hospital of Chongqing Medical University, Chongqing, China
| | - Bo Liu
- Department of Urology, Children’s Hospital of Chongqing Medical University, Chongqing, 400014 China
- Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, China International Science and Technology Cooperation base of Child development and Critical Disorders, Chongqing Key Laboratory of Child Urogenital Development and Tissue Engineering, Chongqing, 400014 China
| | - Yangcai Wang
- Department of Urology, Children’s Hospital of Chongqing Medical University, Chongqing, 400014 China
- Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, China International Science and Technology Cooperation base of Child development and Critical Disorders, Chongqing Key Laboratory of Child Urogenital Development and Tissue Engineering, Chongqing, 400014 China
| | - Jiaqiang Chu
- Department of Urology, Children’s Hospital of Chongqing Medical University, Chongqing, 400014 China
- Chongqing Engineering Research Center of Stem Cell Therapy, Children’s Hospital of Chongqing Medical University, Chongqing, China
| | - Geng Xiong
- Department of Urology, Children’s Hospital of Chongqing Medical University, Chongqing, 400014 China
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Winston-Salem, NC 27101 USA
| | - Lianju Shen
- Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, China International Science and Technology Cooperation base of Child development and Critical Disorders, Chongqing Key Laboratory of Child Urogenital Development and Tissue Engineering, Chongqing, 400014 China
| | - Chunlan Long
- Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, China International Science and Technology Cooperation base of Child development and Critical Disorders, Chongqing Key Laboratory of Child Urogenital Development and Tissue Engineering, Chongqing, 400014 China
| | - Tao Lin
- Department of Urology, Children’s Hospital of Chongqing Medical University, Chongqing, 400014 China
| | - Dawei He
- Department of Urology, Children’s Hospital of Chongqing Medical University, Chongqing, 400014 China
| | - Denis Butnaru
- Research Institute for Uronephrology, Sechenov First Moscow State Medical University, Moscow, 119991 Russia
| | - Lyundup Alexey
- Biomedical Research Department of Institute of Molecular Medicine, Sechenov First Moscow State Medical University, Moscow, 119991 Russia
| | - Yuanyuan Zhang
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Winston-Salem, NC 27101 USA
| | - Deying Zhang
- Department of Urology, Children’s Hospital of Chongqing Medical University, Chongqing, 400014 China
- Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, China International Science and Technology Cooperation base of Child development and Critical Disorders, Chongqing Key Laboratory of Child Urogenital Development and Tissue Engineering, Chongqing, 400014 China
| | - Guanghui Wei
- Department of Urology, Children’s Hospital of Chongqing Medical University, Chongqing, 400014 China
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Development of a cell-seeded modified small intestinal submucosa for urethroplasty. Heliyon 2016; 2:e00087. [PMID: 27441265 PMCID: PMC4946073 DOI: 10.1016/j.heliyon.2016.e00087] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Revised: 01/28/2016] [Accepted: 03/01/2016] [Indexed: 11/21/2022] Open
Abstract
OBJECTIVE To explore the feasibility of a modified 3D porous small intestinal submucosa (SIS) scaffold seeded with urothelial cells (UC) for surgical reconstruction in a rabbit model. MATERIAL AND METHODS Eighteen New England white male rabbits were divided into three groups and a 0.8 × 1.5 cm(2) section of the anterior urethral mucosa was removed from each animal. Ventral onlay urethroplasty was performed with a 1.0 × 1.7 cm(2) SIS scaffold that was either cell-seeded and treated with 5% peracetic acid (PAA) (n = 6), or cell-seeded and untreated (n = 6), or unseeded and treated with 5% PAA (n = 6). Animals were sacrificed at 6 months post-repair and retrograde urethrography and histological analyses performed. RESULTS In animals implanted with cell-seeded and PAA treated SIS scaffolds, urethrography showed wide-caliber urethra without any signs of stricture or fistulae, and histological analyses confirmed a complete urethral structure. In contrast, ulceration and fistula occurred in the reconstructed urethra of animals implanted with cell-seeded but untreated SIS scaffolds, and evident stricture was present in the unseeded, PAA treated group. Histological analyses demonstrated less urothelial coverage and smooth muscle in the cell-seeded and untreated SIS scaffold group, and serious fibrosis formation occurred in the unseeded, treated group. CONCLUSIONS A modified 3D porous SIS scaffold seeded with UC and treated with PAA produces better urethroplasty results than cell-seeded untreated SIS scaffolds, or unseeded PAA treated SIS scaffolds.
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Qi N, Li WJ, Tian H. A systematic review of animal and clinical studies on the use of scaffolds for urethral repair. ACTA ACUST UNITED AC 2016; 36:111-117. [PMID: 26838750 DOI: 10.1007/s11596-016-1551-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Revised: 09/29/2015] [Indexed: 12/26/2022]
Abstract
Replacing urethral tissue with functional scaffolds has been one of the challenging problems in the field of urethra reconstruction or repair over the last several decades. Various scaffold materials have been used in animal studies, but clinical studies on use of scaffolds for urethral repair are scarce. The aim of this study was to review recent animal and clinical studies on the use of different scaffolds for urethral repair, and to evaluate these scaffolds based on the evidence from these studies. PubMed and OVID databases were searched to identify relevant studies, in conjunction with further manual search. Studies that met the inclusion criteria were systematically evaluated. Of 555 identified studies, 38 were included for analysis. It was found that in both animal and clinical studies, scaffolds seeded with cells were used for repair of large segmental defects of the urethra, such as in tubular urethroplasty. When the defect area was small, cell-free scaffolds were more likely to be applied. A lot of pre-clinical and limited clinical evidence showed that natural or artificial materials could be used as scaffolds for urethral repair. Urinary tissue engineering is still in the immature stage, and the safety, efficacy, cost-effectiveness of the scaffolds are needed for further study.
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Affiliation(s)
- Na Qi
- Department of Medical Genetics, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Wen-Jiao Li
- Department of Medical Genetics, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Hong Tian
- Department of Medical Genetics, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
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Huang JW, Lv XG, Li Z, Song LJ, Feng C, Xie MK, Li C, Li HB, Wang JH, Zhu WD, Chen SY, Wang HP, Xu YM. Urethral reconstruction with a 3D porous bacterial cellulose scaffold seeded with lingual keratinocytes in a rabbit model. ACTA ACUST UNITED AC 2015; 10:055005. [PMID: 26358641 DOI: 10.1088/1748-6041/10/5/055005] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The goal of this study was to evaluate the effects of urethral reconstruction with a three-dimensional (3D) porous bacterial cellulose (BC) scaffold seeded with lingual keratinocytes in a rabbit model. A novel 3D porous BC scaffold was prepared by gelatin sponge interfering in the BC fermentation process. Rabbit lingual keratinocytes were isolated, expanded, and seeded onto 3D porous BC. BC alone (group 1, N = 10), 3D porous BC alone (group 2, N = 10), and 3D porous BC seeded with lingual keratinocytes (group 3, N = 10) were used to repair rabbit ventral urethral defects (2.0 × 0.8 cm). Scanning electron microscopy revealed that BC consisted of a compact laminate while 3D porous BC was composed of a porous sheet buttressed by a dense outer layer. The average pore diameter and porosity of the 3D porous BC were 4.23 ± 1.14 μm and 67.00 ± 6.80%, respectively. At 3 months postoperatively, macroscopic examinations and retrograde urethrograms of urethras revealed that all urethras maintained wide calibers in group 3. Strictures were found in all rabbits in groups 1 and 2. Histologically, at 1 month postoperatively, intact epithelium occurred in group 3, and discontinued epithelium was found in groups 1 and 2. However, groups 2 and 3 exhibited similar epithelial regeneration, which was superior to that of group 1 at 3 months (p < 0.05). Comparisons of smooth muscle content and endothelia density among the three groups revealed a significant increase at each time point (p < 0.05). Our results demonstrated that 3D porous BC seeded with lingual keratinocytes enhanced urethral tissue regeneration. 3D porous BC could potentially be used as an optimized scaffold for urethral reconstruction.
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Affiliation(s)
- Jian-Wen Huang
- Department of Urology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai, 200233, People's Republic of China
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Huang JW, Xu YM, Li ZB, Murphy SV, Zhao W, Liu QQ, Zhu WD, Fu Q, Zhang YP, Song LJ. Tissue performance of bladder following stretched electrospun silk fibroin matrix and bladder acellular matrix implantation in a rabbit model. J Biomed Mater Res A 2015; 104:9-16. [PMID: 26148477 DOI: 10.1002/jbm.a.35535] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Revised: 06/07/2015] [Accepted: 06/25/2015] [Indexed: 12/26/2022]
Affiliation(s)
- Jian-Wen Huang
- Department of Urology; Shanghai Jiao Tong University Affiliated Sixth People's Hospital; Shanghai 200233 China
| | - Yue-Min Xu
- Department of Urology; Shanghai Jiao Tong University Affiliated Sixth People's Hospital; Shanghai 200233 China
| | - Zhao-Bo Li
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials; College of Materials Science and Engineering, Donghua University; Shanghai 201620 China
| | - Sean V. Murphy
- Wake Forest Institute for Regenerative Medicine, Wake Forest University Health Sciences, Medical Center Blvd; Winston Salem North Carolina 27157
| | - Weixin Zhao
- Wake Forest Institute for Regenerative Medicine, Wake Forest University Health Sciences, Medical Center Blvd; Winston Salem North Carolina 27157
| | - Qiang-Qiang Liu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials; College of Materials Science and Engineering, Donghua University; Shanghai 201620 China
| | - Wei-Dong Zhu
- Department of Urology; Shanghai Jiao Tong University Affiliated Sixth People's Hospital; Shanghai 200233 China
| | - Qiang Fu
- Department of Urology; Shanghai Jiao Tong University Affiliated Sixth People's Hospital; Shanghai 200233 China
| | - Yao-Peng Zhang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials; College of Materials Science and Engineering, Donghua University; Shanghai 201620 China
| | - Lu-Jie Song
- Department of Urology; Shanghai Jiao Tong University Affiliated Sixth People's Hospital; Shanghai 200233 China
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Rana D, Zreiqat H, Benkirane-Jessel N, Ramakrishna S, Ramalingam M. Development of decellularized scaffolds for stem cell-driven tissue engineering. J Tissue Eng Regen Med 2015; 11:942-965. [PMID: 26119160 DOI: 10.1002/term.2061] [Citation(s) in RCA: 143] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Revised: 04/22/2015] [Accepted: 05/04/2015] [Indexed: 12/19/2022]
Abstract
Organ transplantation is an effective treatment for chronic organ dysfunctioning conditions. However, a dearth of available donor organs for transplantation leads to the death of numerous patients waiting for a suitable organ donor. The potential of decellularized scaffolds, derived from native tissues or organs in the form of scaffolds has been evolved as a promising approach in tissue-regenerative medicine for translating functional organ replacements. In recent years, donor organs, such as heart, liver, lung and kidneys, have been reported to provide acellular extracellular matrix (ECM)-based scaffolds through the process called 'decellularization' and proved to show the potential of recellularization with selected cell populations, particularly with stem cells. In fact, decellularized stem cell matrix (DSCM) has also emerged as a potent biological scaffold for controlling stem cell fate and function during tissue organization. Despite the proven potential of decellularized scaffolds in tissue engineering, the molecular mechanism responsible for stem cell interactions with decellularized scaffolds is still unclear. Stem cells interact with, and respond to, various signals/cues emanating from their ECM. The ability to harness the regenerative potential of stem cells via decellularized ECM-based scaffolds has promising implications for tissue-regenerative medicine. Keeping these points in view, this article reviews the current status of decellularized scaffolds for stem cells, with particular focus on: (a) concept and various methods of decellularization; (b) interaction of stem cells with decellularized scaffolds; (c) current recellularization strategies, with associated challenges; and (iv) applications of the decellularized scaffolds in stem cell-driven tissue engineering and regenerative medicine. Copyright © 2015 John Wiley & Sons, Ltd.
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Affiliation(s)
- Deepti Rana
- Centre for Stem Cell Research (CSCR), Institute for Stem Cell Biology and Regenerative Medicine (Bengaluru) Christian Medical College Campus, Vellore, India
| | - Hala Zreiqat
- Biomaterials and Tissue Engineering Research Unit, Faculty of Engineering and Bosch Institute, University of Sydney, NSW, Australia
| | - Nadia Benkirane-Jessel
- INSERM, Osteoarticular and Dental Regenerative Nanomedicine Laboratory, UMR 1109, Faculté de Médecine, Strasbourg, France
| | - Seeram Ramakrishna
- Centre for Nanofibres and Nanotechnology, Department of Mechanical Engineering, National University of Singapore
| | - Murugan Ramalingam
- Centre for Stem Cell Research (CSCR), Institute for Stem Cell Biology and Regenerative Medicine (Bengaluru) Christian Medical College Campus, Vellore, India
- WPI Advanced Institute for Materials Research, Tohoku University, Sendai, Japan
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Editorial Comment. Urology 2015; 85:1488. [PMID: 25868734 DOI: 10.1016/j.urology.2015.01.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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