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Zhang Z, Bi F, Huang Y, Guo W. Construction of dental pulp decellularized matrix by cyclic lavation combined with mechanical stirring and its proteomic analysis. Biomed Mater 2024; 19:045002. [PMID: 38653259 DOI: 10.1088/1748-605x/ad4245] [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: 11/05/2023] [Accepted: 04/23/2024] [Indexed: 04/25/2024]
Abstract
The decellularized matrix has a great potential for tissue remodeling and regeneration; however, decellularization could induce host immune rejection due to incomplete cell removal or detergent residues, thereby posing significant challenges for its clinical application. Therefore, the selection of an appropriate detergent concentration, further optimization of tissue decellularization technique, increased of biosafety in decellularized tissues, and reduction of tissue damage during the decellularization procedures are pivotal issues that need to be investigated. In this study, we tested several conditions and determined that 0.1% Sodium dodecyl sulfate and three decellularization cycles were the optimal conditions for decellularization of pulp tissue. Decellularization efficiency was calculated and the preparation protocol for dental pulp decellularization matrix (DPDM) was further optimized. To characterize the optimized DPDM, the microstructure, odontogenesis-related protein and fiber content were evaluated. Our results showed that the properties of optimized DPDM were superior to those of the non-optimized matrix. We also performed the 4D-Label-free quantitative proteomic analysis of DPDM and demonstrated the preservation of proteins from the natural pulp. This study provides a optimized protocol for the potential application of DPDM in pulp regeneration.
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Affiliation(s)
- Zhijun Zhang
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, People's Republic of China
- National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, People's Republic of China
- Department of Pediatric Dentistry, West China School of Stomatology, Sichuan University, Chengdu 610041, People's Republic of China
| | - Fei Bi
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, People's Republic of China
- National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, People's Republic of China
- Department of Orthodontics, West China School of Stomatology, Sichuan University, Chengdu 610041, People's Republic of China
| | - Yibing Huang
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, People's Republic of China
- National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, People's Republic of China
- Department of Pediatric Dentistry, West China School of Stomatology, Sichuan University, Chengdu 610041, People's Republic of China
| | - Weihua Guo
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, People's Republic of China
- National Engineering Laboratory for Oral Regenerative Medicine, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, People's Republic of China
- Department of Pediatric Dentistry, West China School of Stomatology, Sichuan University, Chengdu 610041, People's Republic of China
- Yunnan Key Laboratory of Stomatology, The Affiliated Hospital of Stomatology, School of Stomatology, Kunming Medical University, Kunming 650500, People's Republic of China
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Booth D, Afshari R, Ghovvati M, Shariati K, Sturm R, Annabi N. Advances in 3D bioprinting for urethral tissue reconstruction. Trends Biotechnol 2024; 42:544-559. [PMID: 38057169 DOI: 10.1016/j.tibtech.2023.10.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 10/20/2023] [Accepted: 10/24/2023] [Indexed: 12/08/2023]
Abstract
Urethral conditions affect children and adults, increasing the risk of urinary tract infections, voiding and sexual dysfunction, and renal failure. Current tissue replacements differ from healthy urethral tissues in structural and mechanical characteristics, causing high risk of postoperative complications. 3D bioprinting can overcome these limitations through the creation of complex, layered architectures using materials with location-specific biomechanical properties. This review highlights prior research and describes the potential for these emerging technologies to address ongoing challenges in urethral tissue engineering, including biomechanical and structural mismatch, lack of individualized repair solutions, and inadequate wound healing and vascularization. In the future, the integration of 3D bioprinting technology with advanced biomaterials, computational modeling, and 3D imaging could transform personalized urethral surgical procedures.
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Affiliation(s)
- Daniel Booth
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Ronak Afshari
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Mahsa Ghovvati
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Kaavian Shariati
- David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Renea Sturm
- David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095, USA; Department of Urology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095, USA.
| | - Nasim Annabi
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA; Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA 90095, USA.
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3
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Leng W, Li X, Dong L, Guo Z, Ji X, Cai T, Xu C, Zhu Z, Lin J. The Regenerative Microenvironment of the Tissue Engineering for Urethral Strictures. Stem Cell Rev Rep 2024; 20:672-687. [PMID: 38305981 DOI: 10.1007/s12015-024-10686-7] [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] [Accepted: 01/27/2024] [Indexed: 02/03/2024]
Abstract
Urethral stricture caused by various reasons has threatened the quality of life of patients for decades. Traditional reconstruction methods, especially for long-segment injuries, have shown poor outcomes in treating urethral strictures. Tissue engineering for urethral regeneration is an emerging concept in which special designed scaffolds and seed cells are used to promote local urethral regeneration. The scaffolds, seed cells, various factors and the host interact with each other and form the regenerative microenvironment. Among the various interactions involved, vascularization and fibrosis are the most important biological processes during urethral regeneration. Mesenchymal stem cells and induced pluripotent stem cells play special roles in stricture repair and facilitate long-segment urethral regeneration, but they may also induce carcinogenesis and genomic instability during reconstruction. Nevertheless, current technologies, such as genetic engineering, molecular imaging, and exosome extraction, provide us with opportunities to manage seed cell-related regenerative risks. In this review, we described the interactions among seed cells, scaffolds, factors and the host within the regenerative microenvironment, which may help in determining the exact molecular mechanisms involved in urethral stricture regeneration and promoting clinical trials and the application of urethral tissue engineering in patients suffering from urethral stricture.
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Affiliation(s)
- Wenyuan Leng
- Department of Urology, Peking University First Hospital, Beijing, 100034, China
- Institute of Urology, Peking University, Beijing, 100034, China
- National Urological Cancer Center, No. 8, Street Xishiku, District Xicheng, Beijing, 100034, China
- Beijing Key Laboratory of Urogenital Diseases (Male) Molecular Diagnosis and Treatment Center, Beijing, 100034, China
| | - Xiaoyu Li
- Department of Urology, Peking University First Hospital, Beijing, 100034, China
- Institute of Urology, Peking University, Beijing, 100034, China
- National Urological Cancer Center, No. 8, Street Xishiku, District Xicheng, Beijing, 100034, China
- Beijing Key Laboratory of Urogenital Diseases (Male) Molecular Diagnosis and Treatment Center, Beijing, 100034, China
| | - Lei Dong
- Department of Urology, Peking University First Hospital, Beijing, 100034, China
- Institute of Urology, Peking University, Beijing, 100034, China
- National Urological Cancer Center, No. 8, Street Xishiku, District Xicheng, Beijing, 100034, China
- Beijing Key Laboratory of Urogenital Diseases (Male) Molecular Diagnosis and Treatment Center, Beijing, 100034, China
| | - Zhenke Guo
- Department of Urology, Peking University First Hospital, Beijing, 100034, China
- Institute of Urology, Peking University, Beijing, 100034, China
- National Urological Cancer Center, No. 8, Street Xishiku, District Xicheng, Beijing, 100034, China
- Beijing Key Laboratory of Urogenital Diseases (Male) Molecular Diagnosis and Treatment Center, Beijing, 100034, China
| | - Xing Ji
- Department of Urology, Peking University First Hospital, Beijing, 100034, China
- Institute of Urology, Peking University, Beijing, 100034, China
- National Urological Cancer Center, No. 8, Street Xishiku, District Xicheng, Beijing, 100034, China
- Beijing Key Laboratory of Urogenital Diseases (Male) Molecular Diagnosis and Treatment Center, Beijing, 100034, China
| | - Tianyu Cai
- Department of Urology, Peking University First Hospital, Beijing, 100034, China
- Institute of Urology, Peking University, Beijing, 100034, China
- National Urological Cancer Center, No. 8, Street Xishiku, District Xicheng, Beijing, 100034, China
- Beijing Key Laboratory of Urogenital Diseases (Male) Molecular Diagnosis and Treatment Center, Beijing, 100034, China
| | - Chunru Xu
- Department of Urology, Peking University First Hospital, Beijing, 100034, China
- Institute of Urology, Peking University, Beijing, 100034, China
- National Urological Cancer Center, No. 8, Street Xishiku, District Xicheng, Beijing, 100034, China
- Beijing Key Laboratory of Urogenital Diseases (Male) Molecular Diagnosis and Treatment Center, Beijing, 100034, China
| | - Zhenpeng Zhu
- Department of Urology, Peking University First Hospital, Beijing, 100034, China
- Institute of Urology, Peking University, Beijing, 100034, China
- National Urological Cancer Center, No. 8, Street Xishiku, District Xicheng, Beijing, 100034, China
- Beijing Key Laboratory of Urogenital Diseases (Male) Molecular Diagnosis and Treatment Center, Beijing, 100034, China
| | - Jian Lin
- Department of Urology, Peking University First Hospital, Beijing, 100034, China.
- Institute of Urology, Peking University, Beijing, 100034, China.
- National Urological Cancer Center, No. 8, Street Xishiku, District Xicheng, Beijing, 100034, China.
- Beijing Key Laboratory of Urogenital Diseases (Male) Molecular Diagnosis and Treatment Center, Beijing, 100034, China.
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Hua Y, Wang K, Huo Y, Zhuang Y, Wang Y, Fang W, Sun Y, Zhou G, Fu Q, Cui W, Zhang K. Four-dimensional hydrogel dressing adaptable to the urethral microenvironment for scarless urethral reconstruction. Nat Commun 2023; 14:7632. [PMID: 37993447 PMCID: PMC10665446 DOI: 10.1038/s41467-023-43421-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 11/08/2023] [Indexed: 11/24/2023] Open
Abstract
The harsh urethral microenvironment (UME) after trauma severely hinders the current hydrogel-based urethral repair. In fact, four-dimensional (4D) consideration to mimic time-dependent physiological processes is essential for scarless urethral reconstruction, which requires balancing extracellular matrix (ECM) deposition and remodeling at different healing stages. In this study, we develop a UME-adaptable 4D hydrogel dressing to sequentially provide an early-vascularized microenvironment and later-antifibrogenic microenvironment for scarless urethral reconstruction. With the combination of dynamic boronic ester crosslinking and covalent photopolymerization, the resultant gelatin methacryloyl phenylboronic acid/cis-diol-crosslinked (GMPD) hydrogels exhibit mussel-mimetic viscoelasticity, satisfactory adhesion, and acid-reinforced stability, which can adapt to harsh UME. In addition, a temporally on-demand regulatory (TOR) technical platform is introduced into GMPD hydrogels to create a time-dependent 4D microenvironment. As a result, physiological urethral recovery is successfully mimicked by means of an early-vascularized microenvironment to promote wound healing by activating the vascular endothelial growth factor (VEGF) signaling pathway, as well as a later-antifibrogenic microenvironment to prevent hypertrophic scar formation by timing transforming growth factor-β (TGFβ) signaling pathway inhibition. Both in vitro molecular mechanisms of the physiological healing process and in vivo scarless urethral reconstruction in a rabbit model are effectively verified, providing a promising alternative for urethral injury treatment.
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Affiliation(s)
- Yujie Hua
- Department of Urology, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai Jiao Tong University, Shanghai, 200233, P. R. China
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Tissue Engineering, Shanghai, 200011, P. R. China
| | - Kai Wang
- Clinical Research Center, Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200030, P. R. China
| | - Yingying Huo
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Tissue Engineering, Shanghai, 200011, P. R. China
| | - Yaping Zhuang
- Department of Orthopaedics, Shanghai Institute of Traumatology and Orthopaedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, P. R. China
| | - Yuhui Wang
- Department of Urology, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai Jiao Tong University, Shanghai, 200233, P. R. China
| | - Wenzhuo Fang
- Department of Urology, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai Jiao Tong University, Shanghai, 200233, P. R. China
| | - Yuyan Sun
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Tissue Engineering, Shanghai, 200011, P. R. China
| | - Guangdong Zhou
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Tissue Engineering, Shanghai, 200011, P. R. China
| | - Qiang Fu
- Department of Urology, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai Jiao Tong University, Shanghai, 200233, P. R. China.
| | - Wenguo Cui
- Department of Orthopaedics, Shanghai Institute of Traumatology and Orthopaedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, P. R. China.
| | - Kaile Zhang
- Department of Urology, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai Jiao Tong University, Shanghai, 200233, P. R. China.
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5
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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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6
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Foster C, Jensen T, Finck C, Rowe CK. Development of a Wound-Healing Protocol for In Vitro Evaluation of Urothelial Cell Growth. Methods Protoc 2023; 6:64. [PMID: 37489431 PMCID: PMC10366823 DOI: 10.3390/mps6040064] [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: 05/08/2023] [Revised: 06/27/2023] [Accepted: 07/01/2023] [Indexed: 07/26/2023] Open
Abstract
Urethral healing is plagued by strictures, impacting quality of life and medical costs. Various growth factors (GFs) have shown promise as therapeutic approaches to improve healing, but there is no protocol for in vitro comparison between GFs. This study focuses the development of a biomimetic in vitro urothelial healing assay designed to mimic early in vivo healing, followed by an evaluation of urothelial cell growth in response to GFs. METHODS Wound-healing assays were developed with human urothelial cells and used to compared six GFs (EGF, FGF-2, IGF-1, PDGF, TGF-β1, and VEGF) at three concentrations (1 ng/mL, 10 ng/mL, and 100 ng/mL) over a 48 h period. A commercial GF-containing medium (EGF, TGF-α, KGF, and Extract P) and a GF-free medium were used as controls. RESULTS There was a statistically significant increase in cell growth for IGF-1 at 10 and 100 ng/mL compared to both controls (p < 0.05). There was a statistically significant increase in cell growth for EGF at all concentrations compared to the GF-free medium control (p < 0.05). CONCLUSION This study shows the development of a clinically relevant wound-healing assay to evaluate urothelial cell growth. It is the first to compare GFs for future use in reconstructive techniques to improve urethral healing.
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Affiliation(s)
- Christopher Foster
- Department of Pediatrics, University of Connecticut School of Medicine, Farmington, CT 06032, USA
| | - Todd Jensen
- Department of Pediatrics, University of Connecticut School of Medicine, Farmington, CT 06032, USA
| | - Christine Finck
- Department of Pediatrics, University of Connecticut School of Medicine, Farmington, CT 06032, USA
- Division of Pediatric General and Thoracic Surgery, Connecticut Children's, Hartford, CT 06108, USA
| | - Courtney K Rowe
- Department of Pediatrics, University of Connecticut School of Medicine, Farmington, CT 06032, USA
- Division of Pediatric Urology, Connecticut Children's, Hartford, CT 06108, USA
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Jiao W, Yu W, Wang Y, Zhang J, Wang Y, He H, Shi G. Fibrinogen/poly(l-lactide-co-caprolactone) copolymer scaffold: A potent adhesive material for urethral tissue regeneration in urethral injury treatment. Regen Ther 2023; 22:136-147. [PMID: 36793307 PMCID: PMC9923042 DOI: 10.1016/j.reth.2022.12.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 10/02/2022] [Accepted: 12/13/2022] [Indexed: 01/30/2023] Open
Abstract
Since a scarcity of sufficient grafting materials, several complications can arise after urothelial defect reconstruction surgery, including severe hypospadias. Accordingly, developing alternative therapies, such as urethral restoration via tissue engineering are needed. In the present study, we developed a potent adhesive and repairing material using fibrinogen-poly(l-lactide-co-caprolactone) copolymer (Fib-PLCL) nanofiber scaffold to achieve effective urethral tissue regeneration after seeding with epithelial cells on the surface. The in vitro result found the Fib-PLCL scaffold promoted the attachment and viability of epithelial cells on their surface. The increased expression levels of cytokeratin and actin filaments were observed in Fib-PLCL scaffold than PLCL scaffold. The in vivo urethral injury repairing potential of Fib-PLCL scaffold was evaluated using a rabbit urethral replacement model. In this study, a urethral defect was surgically excised and replaced with the Fib-PLCL and PLCL scaffolds or autograft. As expected, the animals healed well after surgery in the Fib-PLCL scaffold group, and no significant strictures were identified. As expected, the cellularized Fib/PLCL grafts have induced the luminal epithelialization, urethral smooth muscle cell remodelling, and capillary development all at the same time. Histological analysis revealed that the urothelial integrity in the Fib-PLCL group had progressed to that of a normal urothelium, with enhanced urethral tissue development. Based on the results, the present study suggests that the prepared fibrinogen-PLCL scaffold is more appropriate for urethral defect reconstruction.
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Affiliation(s)
- Wei Jiao
- Department of Urology, Shanghai Fifth People's Hospital, Fudan University, No. 801 Heqing Road, Minhang District, Shanghai 200240, China
| | - Wandong Yu
- Department of Urology, Shanghai Fifth People's Hospital, Fudan University, No. 801 Heqing Road, Minhang District, Shanghai 200240, China
| | - Yangyun Wang
- Department of Urology, Shanghai Fifth People's Hospital, Fudan University, No. 801 Heqing Road, Minhang District, Shanghai 200240, China
| | - Jun Zhang
- Department of Urology, Shanghai Fifth People's Hospital, Fudan University, No. 801 Heqing Road, Minhang District, Shanghai 200240, China
| | - Yang Wang
- Department of Urology, Shanghai Fifth People's Hospital, Fudan University, No. 801 Heqing Road, Minhang District, Shanghai 200240, China
| | - Hongbing He
- Shanghai Songli Biotechnology Co., Ltd, Shanghai 201206, China
| | - Guowei Shi
- Department of Urology, Shanghai Fifth People's Hospital, Fudan University, No. 801 Heqing Road, Minhang District, Shanghai 200240, China
- Corresponding author.
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8
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Sah MK, Mukherjee S, Flora B, Malek N, Rath SN. Advancement in "Garbage In Biomaterials Out (GIBO)" concept to develop biomaterials from agricultural waste for tissue engineering and biomedical applications. JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE & ENGINEERING 2022; 20:1015-1033. [PMID: 36406592 PMCID: PMC9672289 DOI: 10.1007/s40201-022-00815-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 06/27/2022] [Indexed: 06/16/2023]
Abstract
UNLABELLED Presently on a global scale, one of the major concerns is to find effective strategies to manage the agricultural waste to protect the environment. One strategy that has been drawing attention among the researchers is the development of biocompatible materials from agricultural waste. This strategy implies successful conversion of agricultural waste products (e.g.: cellulose, eggshell etc.) into building blocks for biomaterial development. Some of these wastes contain even bioactive compounds having biomedical applications. The replacement and augmentation of human tissue with biomaterials as alternative to traditional method not only bypasses immune-rejection, donor scarcity, and maintenance; but also provides long term solution to damaged or malfunctioning organs. Biomaterials development as one of the key challenges in tissue engineering approach, resourced from natural origin imparts better biocompatibility due to closely mimicking composition with cellular microenvironment. The "Garbage In, Biomaterials Out (GIBO)" concept, not only recycles the agricultural wastes, but also adds to biomaterial raw products for further product development in tissue regeneration. This paper reviews the conversion of garbage agricultural by-products to the biocompatible materials for various biomedical applications. GRAPHICAL ABSTRACT The agro-waste biomass processed, purified, modified, and further utilized for the fabrication of biomaterials-based support system for tissue engineering applications to grow living body parts in vitro or in vivo.
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Affiliation(s)
- Mahesh Kumar Sah
- Department of Biotechnology, Dr. B. R. Ambedkar, National Institute of Technology, Jalandhar, Punjab 144011 India
| | - Sunny Mukherjee
- Department of Biotechnology, Dr. B. R. Ambedkar, National Institute of Technology, Jalandhar, Punjab 144011 India
| | - Bableen Flora
- Department of Biotechnology, Lovely Professional University, Jalandhar, Punjab India
| | - Naved Malek
- Department of Chemistry, S. V. National Institute of Technology, Surat, Gujarat India
| | - Subha Narayan Rath
- Department of Biomedical Engineering, Indian Institute of Technology Hyderabad, Kandi, Medak, Telangana India
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9
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Xuan Z, Zachar V, Pennisi CP. Sources, Selection, and Microenvironmental Preconditioning of Cells for Urethral Tissue Engineering. Int J Mol Sci 2022; 23:ijms232214074. [PMID: 36430557 PMCID: PMC9697333 DOI: 10.3390/ijms232214074] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 11/10/2022] [Accepted: 11/12/2022] [Indexed: 11/18/2022] Open
Abstract
Urethral stricture is a common urinary tract disorder in men that can be caused by iatrogenic causes, trauma, inflammation, or infection and often requires reconstructive surgery. The current therapeutic approach for complex urethral strictures usually involves reconstruction with autologous tissue from the oral mucosa. With the goal of overcoming the lack of sufficient autologous tissue and donor site morbidity, research over the past two decades has focused on cell-based tissue-engineered substitutes. While the main focus has been on autologous cells from the penile tissue, bladder, and oral cavity, stem cells from sources such as adipose tissue and urine are competing candidates for future urethral regeneration due to their ease of collection, high proliferative capacity, maturation potential, and paracrine function. This review addresses the sources, advantages, and limitations of cells for tissue engineering in the urethra and discusses recent approaches to improve cell survival, growth, and differentiation by mimicking the mechanical and biophysical properties of the extracellular environment.
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10
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Guimarães CF, Marques AP, Reis RL. Pushing the Natural Frontier: Progress on the Integration of Biomaterial Cues toward Combinatorial Biofabrication and Tissue Engineering. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2105645. [PMID: 35419887 DOI: 10.1002/adma.202105645] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 03/14/2022] [Indexed: 06/14/2023]
Abstract
The engineering of fully functional, biological-like tissues requires biomaterials to direct cellular events to a near-native, 3D niche extent. Natural biomaterials are generally seen as a safe option for cell support, but their biocompatibility and biodegradability can be just as limited as their bioactive/biomimetic performance. Furthermore, integrating different biomaterial cues and their final impact on cellular behavior is a complex equation where the outcome might be very different from the sum of individual parts. This review critically analyses recent progress on biomaterial-induced cellular responses, from simple adhesion to more complex stem cell differentiation, looking at the ever-growing possibilities of natural materials modification. Starting with a discussion on native material formulation and the inclusion of cell-instructive cues, the roles of shape and mechanical stimuli, the susceptibility to cellular remodeling, and the often-overlooked impact of cellular density and cell-cell interactions within constructs, are delved into. Along the way, synergistic and antagonistic combinations reported in vitro and in vivo are singled out, identifying needs and current lessons on the development of natural biomaterial libraries to solve the cell-material puzzle efficiently. This review brings together knowledge from different fields envisioning next-generation, combinatorial biomaterial development toward complex tissue engineering.
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Affiliation(s)
- Carlos F Guimarães
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães, 4805-017, Portugal
- ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Alexandra P Marques
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães, 4805-017, Portugal
- ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Rui L Reis
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães, 4805-017, Portugal
- ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
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Yang M, Liu G, Ying Q. Study on Protein Nanomarker Combined with Vascular Endothelial Growth Factor to Improve Vascularization of Rabbit Urethral Defect Tissue Engineering. J BIOMATER TISS ENG 2022. [DOI: 10.1166/jbt.2022.2949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
To construct the tissue engineering urethral material that is closest to the normal urethral structure in the true sense in vitro. Abdominal ADSC from a 2-month-old New Zealand white rabbit was extracted and directly compounded with non-woven polyglycolic acid (PGA) (control
group) to induce the differentiation of myoblasts and epithelial-like cells in vitro and shaped into urethral structure lumen Observation group); After Gd chelating protein nano-labeling and VEGF-loaded sustained release, the rabbit model of a long urethral defect was replanted and
cultured for 4 weeks, 8 weeks and 12 weeks, respectively. There was no difference in urinary tract patency rate, urinary tract infection, and renal dysfunction rate between the two groups (P > 0.05). The urine flow rate in the observation group was significantly higher than that
in the control group, and the residual volume decreased (P < 0.05). The blood vessel density and CD31 percentage in the observation group increased (P < 0.05). Compared with the conventional ADSC directly in contact with the composite material to construct the urethra,
in vitro induction of ADSC to myoblasts and epithelial-like cells respectively, and then use the cell membrane technology to build a tissue engineering urethral material that is closest to the normal urethral structure in the true sense, and loaded with VEGF Loop release technology
can significantly improve urodynamic functions, optimize tissue engineering urethral structure and vascularization, and is expected to become a new technology for constructing new tissue engineering urethral materials.
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Affiliation(s)
- Min Yang
- Department of Obstetrics and Gynecology, Shaxiyuan District, Luzhou People’s Hospital, Sichuan Province, 646000, China
| | - Guixi Liu
- Department of Urology, The Third Hospital of Mianyang (Sichuan Mental Health Center), Sichuan Province, 621000, China
| | - Qiao Ying
- Department of Urology, People’s Hospital of Guang’an City (West China-Guang’an Hospital, Sichuan University), 638000, China
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Ławkowska K, Rosenbaum C, Petrasz P, Kluth L, Koper K, Drewa T, Pokrywczynska M, Adamowicz J. Tissue engineering in reconstructive urology-The current status and critical insights to set future directions-critical review. Front Bioeng Biotechnol 2022; 10:1040987. [PMID: 36950181 PMCID: PMC10026841 DOI: 10.3389/fbioe.2022.1040987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Accepted: 12/13/2022] [Indexed: 03/05/2023] Open
Abstract
Advanced techniques of reconstructive urology are gradually reaching their limits in terms of their ability to restore urinary tract function and patients' quality of life. A tissue engineering-based approach to urinary tract reconstruction, utilizing cells and biomaterials, offers an opportunity to overcome current limitations. Although tissue engineering studies have been heralding the imminent introduction of this method into clinics for over a decade, tissue engineering is only marginally applied. In this review, we discuss the role of tissue engineering in reconstructive urology and try to answer the question of why such a promising technology has not proven its clinical usability so far.
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Affiliation(s)
- Karolina Ławkowska
- Department of Regenerative Medicine, Collegium Medicum, Nicolaus Copernicus University, Bydgoszcz, Poland
- *Correspondence: Karolina Ławkowska, ; Clemens Rosenbaum, ; Piotr Petrasz, ; Krzysztof Koper, ; Luis Kluth, ; Tomasz Drewa, ; Marta Pokrywczynska, ; Jan Adamowicz,
| | - Clemens Rosenbaum
- Department of Urology Asklepios Klinik Barmbek Germany, Urologist in Hamburg, Hamburg, Germany
- *Correspondence: Karolina Ławkowska, ; Clemens Rosenbaum, ; Piotr Petrasz, ; Krzysztof Koper, ; Luis Kluth, ; Tomasz Drewa, ; Marta Pokrywczynska, ; Jan Adamowicz,
| | - Piotr Petrasz
- Department of Urology Voivodeship Hospital Gorzów Wielkopolski, Gorzów Wielkopolski, Poland
- *Correspondence: Karolina Ławkowska, ; Clemens Rosenbaum, ; Piotr Petrasz, ; Krzysztof Koper, ; Luis Kluth, ; Tomasz Drewa, ; Marta Pokrywczynska, ; Jan Adamowicz,
| | - Luis Kluth
- Department of Urology, University Medical Center Frankfurt, Frankfurt am Main, Germany
- *Correspondence: Karolina Ławkowska, ; Clemens Rosenbaum, ; Piotr Petrasz, ; Krzysztof Koper, ; Luis Kluth, ; Tomasz Drewa, ; Marta Pokrywczynska, ; Jan Adamowicz,
| | - Krzysztof Koper
- Department of Clinical Oncology and Nursing, Collegium Medicum, Nicolaus Copernicus University, Curie-Skłodowskiej 9, Bydgoszcz, Poland
- *Correspondence: Karolina Ławkowska, ; Clemens Rosenbaum, ; Piotr Petrasz, ; Krzysztof Koper, ; Luis Kluth, ; Tomasz Drewa, ; Marta Pokrywczynska, ; Jan Adamowicz,
| | - Tomasz Drewa
- Department of Regenerative Medicine, Collegium Medicum, Nicolaus Copernicus University, Bydgoszcz, Poland
- *Correspondence: Karolina Ławkowska, ; Clemens Rosenbaum, ; Piotr Petrasz, ; Krzysztof Koper, ; Luis Kluth, ; Tomasz Drewa, ; Marta Pokrywczynska, ; Jan Adamowicz,
| | - Marta Pokrywczynska
- Department of Regenerative Medicine, Collegium Medicum, Nicolaus Copernicus University, Bydgoszcz, Poland
- *Correspondence: Karolina Ławkowska, ; Clemens Rosenbaum, ; Piotr Petrasz, ; Krzysztof Koper, ; Luis Kluth, ; Tomasz Drewa, ; Marta Pokrywczynska, ; Jan Adamowicz,
| | - Jan Adamowicz
- Department of Regenerative Medicine, Collegium Medicum, Nicolaus Copernicus University, Bydgoszcz, Poland
- *Correspondence: Karolina Ławkowska, ; Clemens Rosenbaum, ; Piotr Petrasz, ; Krzysztof Koper, ; Luis Kluth, ; Tomasz Drewa, ; Marta Pokrywczynska, ; Jan Adamowicz,
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Gallo N, Natali ML, Curci C, Picerno A, Gallone A, Vulpi M, Vitarelli A, Ditonno P, Cascione M, Sallustio F, Rinaldi R, Sannino A, Salvatore L. Analysis of the Physico-Chemical, Mechanical and Biological Properties of Crosslinked Type-I Collagen from Horse Tendon: Towards the Development of Ideal Scaffolding Material for Urethral Regeneration. MATERIALS (BASEL, SWITZERLAND) 2021; 14:7648. [PMID: 34947245 PMCID: PMC8707771 DOI: 10.3390/ma14247648] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 12/05/2021] [Accepted: 12/09/2021] [Indexed: 11/19/2022]
Abstract
Urethral stenosis is a pathological condition that consists in the narrowing of the urethral lumen because of the formation of scar tissue. Unfortunately, none of the current surgical approaches represent an optimal solution because of the high stricture recurrence rate. In this context, we preliminarily explored the potential of an insoluble type-I collagen from horse tendon as scaffolding material for the development of innovative devices for the regeneration of injured urethral tracts. Non-porous collagen-based substrates were produced and optimized, in terms of crosslinking density of the macromolecular structure, to either provide mechanical properties compliant with the urinary tract physiological stress and better sustain tissue regeneration. The effect of the adopted crosslinking strategy on the protein integrity and on the substrate physical-chemical, mechanical and biological properties was investigated in comparison with a decellularized matrix from porcine small intestinal submucosa (SIS patch), an extensively used xenograft licensed for clinical use in urology. The optimized production protocols allowed the preservation of the type I collagen native structure and the realization of a substrate with appealing end-use properties. The biological response, preliminarily investigated by immunofluorescence experiments on human adult renal stem/progenitor cells until 28 days, showed the formation of a stem-cell monolayer within 14 days and the onset of spheroids within 28 days. These results suggested the great potential of the collagen-based material for the development of scaffolds for urethral plate regeneration and for in vitro cellular studies.
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Affiliation(s)
- Nunzia Gallo
- Department of Engineering for Innovation, University of Salento, 73100 Lecce, Italy; (M.L.N.); (A.S.); (L.S.)
| | - Maria Lucia Natali
- Department of Engineering for Innovation, University of Salento, 73100 Lecce, Italy; (M.L.N.); (A.S.); (L.S.)
- Typeone Biomaterials, Via Vittorio Veneto 64/C, 73036 Muro Leccese, Italy
| | - Claudia Curci
- Department of Basic Medical Sciences, Neurosciences and Sense Organs, University of Bari “Aldo Moro”, 70124 Bari, Italy; (C.C.); (A.G.)
| | - Angela Picerno
- Nephrology Unit, Department of Emergency and Organ Transplantation, University of Bari “Aldo Moro”, 70124 Bari, Italy;
| | - Anna Gallone
- Department of Basic Medical Sciences, Neurosciences and Sense Organs, University of Bari “Aldo Moro”, 70124 Bari, Italy; (C.C.); (A.G.)
| | - Marco Vulpi
- Urology and Andrology Unit, Department of Emergency and Organ Transplant, University of Bari “Aldo Moro”, 70124 Bari, Italy; (M.V.); (A.V.); (P.D.)
| | - Antonio Vitarelli
- Urology and Andrology Unit, Department of Emergency and Organ Transplant, University of Bari “Aldo Moro”, 70124 Bari, Italy; (M.V.); (A.V.); (P.D.)
| | - Pasquale Ditonno
- Urology and Andrology Unit, Department of Emergency and Organ Transplant, University of Bari “Aldo Moro”, 70124 Bari, Italy; (M.V.); (A.V.); (P.D.)
| | - Mariafrancesca Cascione
- Department of Mathematics and Physics “Ennio De Giorgi”, University of Salento, 73100 Lecce, Italy; (M.C.); (R.R.)
| | - Fabio Sallustio
- Department of Interdisciplinary Medicine, University of Bari “Aldo Moro”, 70124 Bari, Italy;
| | - Rosaria Rinaldi
- Department of Mathematics and Physics “Ennio De Giorgi”, University of Salento, 73100 Lecce, Italy; (M.C.); (R.R.)
| | - Alessandro Sannino
- Department of Engineering for Innovation, University of Salento, 73100 Lecce, Italy; (M.L.N.); (A.S.); (L.S.)
| | - Luca Salvatore
- Department of Engineering for Innovation, University of Salento, 73100 Lecce, Italy; (M.L.N.); (A.S.); (L.S.)
- Typeone Biomaterials, Via Vittorio Veneto 64/C, 73036 Muro Leccese, Italy
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Abstract
Tissue engineering could play a major role in the setting of urinary diversion. Several conditions cause the functional or anatomic loss of urinary bladder, requiring reconstructive procedures on the urinary tract. Three main approaches are possible: (i) incontinent cutaneous diversion, such as ureterocutaneostomy, colonic or ileal conduit, (ii) continent pouch created using different segments of the gastrointestinal system and a cutaneous stoma, and (iii) orthotopic urinary diversion with an intestinal segment with spherical configuration and anastomosis to the urethra (neobladder, orthotopic bladder substitution). However, urinary diversions are associated with numerous complications, such as mucus production, electrolyte imbalances and increased malignant transformation potential. In this context, tissue engineering would have the fundamental role of creating a suitable material for urinary diversion, avoiding the use of bowel segments, and reducing complications. Materials used for the purpose of urinary substitution are biological in case of acellular tissue matrices and naturally derived materials, or artificial in case of synthetic polymers. However, only limited success has been achieved so far. The aim of this review is to present the ideal properties of a urinary tissue engineered scaffold and to examine the results achieved so far. The most promising studies have been highlighted in order to guide the choice of scaffolds and cells type for further evolutions.
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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: 4] [Impact Index Per Article: 1.3] [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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Tissue engineering: recent advances and review of clinical outcome for urethral strictures. Curr Opin Urol 2021; 31:498-503. [PMID: 34397507 DOI: 10.1097/mou.0000000000000921] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
PURPOSE OF REVIEW Urethrotomy remains the first-line therapy in the treatment of a urethral stricture despite data showing no real chance of a cure after repeated urethrotomies. An anastomotic or an augmentation urethroplasty using oral mucosa can be offered to patients following failed urethrotomy. The potential for a tissue engineered solution as an alternative to native tissue has been explored in recent years and is reviewed in this article. RECENT FINDINGS More than 80 preclinical studies have investigated a tissue-engineered approach for urethral reconstruction mostly using decellularized natural scaffolds derived from natural extracellular matrix with or without cell seeding. The animal models used in preclinical testing are not representative of disease processes seen with strictures in man. The available clinical studies are based on small noncontrolled series. SUMMARY There is a potential role for tissue engineering to provide a material for substitution urethroplasty and work has demonstrated this. Further work will require a rigorous basic science programme and adequate evaluation of the material prior to its introduction into clinical practice. The research with tissue engineering applied to the urethra has not yet been resulted in a widely available material for clinical use that approaches the efficacy seen with the use of autologous grafts.
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Li D, Shen Z, Xu Y. Tubularized urethral reconstruction using everted saphenous vein graft in a beagle model. BMC Urol 2021; 21:63. [PMID: 33865365 PMCID: PMC8052832 DOI: 10.1186/s12894-021-00833-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2020] [Accepted: 04/12/2021] [Indexed: 12/04/2022] Open
Abstract
Background A long segment stricture in the anterior urethra is a challenge in urology. We conducted a study to investigate the efficacy of anterior urethral reconstruction using an everted saphenous vein graft (SVG) in a tubular fashion.
Methods Twelve male beagles were randomly divided into three groups: experimental group (n = 5), control group (n = 5) and normal group (n = 2). A 3 cm defect in the anterior urethra was created. Autologous SVG was harvested. In the experimental group, urethral defect was replaced by an everted SVG in a tubular fashion. In the control group, urethral reconstruction was performed using an uneverted SVG. Beagles in all groups received retrograde urethrography to evaluate urethral patency and were killed for histological examination 6 months after operation. Results Four beagles in the experimental group had no voiding difficulty and the other one could not void spontaneously. Retrograde urethrography showed the four beagles in experimental group had wide urethral lumens. Ether urethral stricture or fistula were detected in all animals in the control group. Histological analysis of the four beagles in the experimental group indicated the everted SVG completely integrated into the urethra. The reconstructed urethra contained a wide lumen and was completely covered by urothelium. The periurethral collagen and muscle fibers formed and were highly organized. Everted SVG showed a high ability of neovascularization. In the control group, the reconstructed segment showed a fibrotic urethral lumen where the urothelium was not intact. Only few new capillaries were formed. Conclusions Everted SVG demonstrates for a promising strategy for potential urethral stricture repair.
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Affiliation(s)
- Dan Li
- Department of General Practice, The First Affiliated Hospital of Wannan Medical College (Yijishan Hospital of Wannan Medical College), Wuhu, 241000, China
| | - Zhou Shen
- Department of Urology, Anhui Provincial Hospital, Anhui Medical University, Hefei, Anhui, China
| | - Yujie Xu
- Department of Urology, The First Affiliated Hospital of Wannan Medical College (Yijishan Hospital of Wannan Medical College), 2 Zheshan West Road, Wuhu, 241000, Anhui Province, China.
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Niu Y, Liu G, Fu M, Chen C, Fu W, Zhang Z, Xia H, Stadler FJ. Designing a multifaceted bio-interface nanofiber tissue-engineered tubular scaffold graft to promote neo-vascularization for urethral regeneration. J Mater Chem B 2021; 8:1748-1758. [PMID: 32031190 DOI: 10.1039/c9tb01915d] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Reconstitution of urethral defects through a tissue-engineered autologous urethra is an exciting area of clinical urology research. Despite rapid advances in this field, a tissue-engineered urethra is still inaccessible to clinical applications because of the poor vascularization of the current scaffold materials, especially for the reconstruction of complex urethral defects. In this study, we report the preparation of multifaceted bio-interfacing tissue-engineered autologous scaffolds based on alternating block polyurethane (abbreviated as PU-alt), a kind of tubular scaffold with a hierarchical nanofiber architecture, flexible mechanical properties and a hydrophilic PEGylation interface capable of promoting adhesion, oriented elongation, and proliferation of New Zealand rabbit autologous urethral epithelial cells (ECs) and smooth muscle cells (SMCs) simultaneously, and also upregulating the expression of keratin (AE1/AE3) in ECs and contractile protein (α-SMA) in SMCs as well as the subsequent synthesis of elastin. Three months in vivo scaffold substitution of rabbit urethras displayed that the engineered autologous PU-alt scaffold grafts, with a coating rich in seed cell-matrix, could induce local neo-vascularization, facilitating oriented SMC remodeling and lumen epithelialization as well as patency. Our findings indicate a central role of the synergistic interplay of seed cell-matrix bio-interface and nano-topographic cues in the vascularized urethral reconstruction.
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Affiliation(s)
- Yuqing Niu
- Department of Pediatric Surgery, Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510623, Guangdong, China. and Nanshan District Key Lab for Biopolymers and Safety Evaluation, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518055, P. R. China. and State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, 430071, China
| | - Guochang Liu
- Department of Pediatric Urology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510623, Guangdong, China
| | - Ming Fu
- Department of Pediatric Urology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510623, Guangdong, China
| | - Chuangbi Chen
- Nanshan District Key Lab for Biopolymers and Safety Evaluation, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518055, P. R. China.
| | - Wen Fu
- Department of Pediatric Urology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510623, Guangdong, China
| | - Zhao Zhang
- Department of Pediatric Urology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510623, Guangdong, China
| | - Huimin Xia
- Department of Pediatric Surgery, Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510623, Guangdong, China. and State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, 430071, China
| | - Florian J Stadler
- Nanshan District Key Lab for Biopolymers and Safety Evaluation, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518055, P. R. China.
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Encapsulated three-dimensional bioprinted structure seeded with urothelial cells: a new construction technique for tissue-engineered urinary tract patch. Chin Med J (Engl) 2020; 133:424-434. [PMID: 31977553 PMCID: PMC7046243 DOI: 10.1097/cm9.0000000000000654] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Traditional tissue engineering methods to fabricate urinary tract patch have some drawbacks such as compromised cell viability and uneven cell distribution within scaffold. In this study, we combined three-dimensional (3D) bioprinting and tissue engineering method to form a tissue-engineered urinary tract patch, which could be employed for the application on Beagles urinary tract defect mode to verify its effectiveness on urinary tract reconstruction. METHODS Human adipose-derived stem cells (hADSCs) were dropped into smooth muscle differentiation medium to generate induced microtissues (ID-MTs), flow cytometry was utilized to detect the positive percentage for CD44, CD105, CD45, and CD34 of hADSCs. Expression of vascular endothelial growth factor A (VEGFA) and tumor necrosis factor-stimulated gene-6 (TSG-6) in hADSCs and MTs were identified by Western blotting. Then the ID-MTs were employed for 3D bioprinting. The bioprinted structure was encapsulated by transplantation into the subcutaneous tissue of nude mice for 1 week. After retrieval of the encapsulated structure, hematoxylin and eosin and Masson's trichrome staining were performed to demonstrate the morphology and reveal collagen and smooth muscle fibers, integral optical density (IOD) and area of interest were calculated for further semi-quantitative analysis. Immunofluorescent double staining of CD31 and α-smooth muscle actin (α-SMA) were used to reveal vascularization of the encapsulated structure. Immunohistochemistry was performed to evaluate the expression of interleukin-2 (IL-2), α-SMA, and smoothelin of the MTs in the implanted structure. Afterward, the encapsulated structure was seeded with human urothelial cells. Immunofluorescent staining of cytokeratins AE1/AE3 was applied to inspect the morphology of seeded encapsulated structure. RESULTS The semi-quantitative assay showed that the relative protein expression of VEGFA was 0.355 ± 0.038 in the hADSCs vs. 0.649 ± 0.150 in the MTs (t = 3.291, P = 0.030), while TSG-6 expression was 0.492 ± 0.092 in the hADSCs vs. 1.256 ± 0.401 in the MTs (t = 3.216, P = 0.032). The semi-quantitative analysis showed that the mean IOD of IL-2 in the MT group was 7.67 ± 1.26, while 12.6 ± 4.79 in the hADSCs group, but semi-quantitative analysis showed that there was no statistical significance in the difference between the two groups (t = 1.724, P = 0.16). The semi-quantitative analysis showed that IOD was 71.7 ± 14.2 in non-induced MTs (NI-MTs) vs. 35.7 ± 11.4 in ID-MTs for collagen fibers (t = 3.428, P = 0.027) and 12.8 ± 1.9 in NI-MTs vs. 30.6 ± 8.9 in ID-MTs for smooth muscle fibers (t = 3.369, P = 0.028); furthermore, the mean IOD was 0.0613 ± 0.0172 in ID-MTs vs. 0.0017 ± 0.0009 in NI-MTs for α-SMA (t = 5.994, P = 0.027), while 0.0355 ± 0.0128 in ID-MTs vs. 0.0035 ± 0.0022 in NI-MTs for smoothelin (t = 4.268, P = 0.013), which indicate that 3D bioprinted structure containing ID-MTs could mimic the smooth muscle layer of native urinary tract. After encapsulation of the urinary tract patch for additional cell adhesion, urothelial cells were seeded onto the encapsulated structures, and a monolayer urothelial cell was observed. CONCLUSION Through 3D bioprinting and tissue engineering methods, we provided a promising way to fabricate tissue-engineered urinary tract patch for further investigation.
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Preparation and Characterization of Nano-Laponite/PLGA Composite Scaffolds for Urethra Tissue Engineering. Mol Biotechnol 2020; 62:192-199. [PMID: 32016781 DOI: 10.1007/s12033-020-00237-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The purpose of this study was to construct a biomimetic urethral repair substitute. The nano-Laponite/polylactic acid-glycolic acid copolymer (PLGA) fiber scaffolds were produced to replicate the natural human urethra tissue microenvironment. PLGA (molar ratio 50:50) and Laponite were used in this study as raw materials. The nano-Laponite/PLGA scaffolds were fabricated via electrospinning technology. After preparing the material, the microstructural and mechanical properties of the nano-Laponite/PLGA scaffold were tested via scanning electron microscopy and electronic universal testing. The effects of different amounts of Laponite on the degradation of the nano-Laponite/PLGA scaffold were studied. Human umbilical vein endothelial cells (HUVECs) were co-cultured with PLGA and nano-Laponite/PLGA scaffolds for 24, 48, or 72 h. Scanning electron microscopy results illustrated that the microstructure of the scaffold fabricated by electrospinning was similar to that of the natural extracellular matrix. When the electrospinning liquid contained 10% Laponite, the nano-Laponite/PLGA stress-strain curve illustrated that the scaffold has strong elastic deformation ability. HUVECs exhibited good growth on the nano-Laponite/PLGA scaffold. When the scaffold contained 1% Laponite, the cell proliferation rate in the CCK-8 test was significantly better than that for the other three materials, displaying good cell culture characteristics. The 1% nano-Laponite/PLGA composite scaffold can be used as a suitable urethral repair material, but its performance requires further development and research.
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Wan X, Zheng D, Yao H, Fu S, Wei Z, Wang Z, Xie M. An extracellular matrix-mimicking, bilayered, heterogeneous, porous, nanofibrous scaffold for anterior urethroplasty in a rabbit model. ACTA ACUST UNITED AC 2020; 15:065008. [PMID: 32580173 DOI: 10.1088/1748-605x/ab9fd0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Anterior urethral reconstruction is still a challenging clinical task, and tissue engineering technology offers new options for anterior urethroplasty. In this work, we evaluated an extracellular matrix (ECM) mimicking scaffold for anterior urethral reconstruction in a New Zealand white rabbit model. After the creation of a urethral defect, the ECM-mimicking scaffold was applied in six rabbits, and small intestinal submucosa (SIS) was used in three rabbits. The outcomes of urethrography and histological analysis were evaluated six months postoperatively. A larger urethral diameter was observed in the ECM-mimicking scaffolds (3.01 ± 0.12 mm) than in the SIS grafts (0.95 ± 0.07 mm). Urethral fistulae and stenosis were observed in the SIS grafts. Urothelial and smooth muscle cells were observed in all rabbits, but the ECM-mimicking scaffold showed better performance. The ECM-mimicking scaffold may be an effective clinical treatment option for congenital and acquired urethral pathologies.
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Affiliation(s)
- Xiang Wan
- Department of Urology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200001, People's Republic of China. These authors have contributed equally
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Mahara A, Li M, Ohya Y, Yamaoka T. Small-Diameter Synthetic Vascular Graft Immobilized with the REDV Peptide Reduces Early-Stage Fibrin Clot Deposition and Results in Graft Patency in Rats. Biomacromolecules 2020; 21:3092-3101. [DOI: 10.1021/acs.biomac.0c00457] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Atsushi Mahara
- Department of Biomedical Engineering, National Cerebral and Cardiovascular Center Research Institute, Kishibe Shim-machi, Suita, Osaka 5645-8565, Japan
| | - Minglun Li
- Department of Biomedical Engineering, National Cerebral and Cardiovascular Center Research Institute, Kishibe Shim-machi, Suita, Osaka 5645-8565, Japan
- Faculty of Chemistry, Materials and Bioengineering, Kansai University, 3-3-35 Yamatecho, Suita, Osaka 565-8680, Japan
| | - Yuichi Ohya
- Faculty of Chemistry, Materials and Bioengineering, Kansai University, 3-3-35 Yamatecho, Suita, Osaka 565-8680, Japan
| | - Tetsuji Yamaoka
- Department of Biomedical Engineering, National Cerebral and Cardiovascular Center Research Institute, Kishibe Shim-machi, Suita, Osaka 5645-8565, Japan
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RAZAVI MEHDI, PRIMAVERA ROSITA, KEVADIYA BHAVESHD, WANG JING, BUCHWALD PETER, THAKOR AVNESHS. A Collagen Based Cryogel Bioscaffold that Generates Oxygen for Islet Transplantation. ADVANCED FUNCTIONAL MATERIALS 2020; 30:1902463. [PMID: 33071709 PMCID: PMC7567341 DOI: 10.1002/adfm.201902463] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Indexed: 05/24/2023]
Abstract
The aim of this work was to develop, characterize and test a novel 3D bioscaffold matrix which can accommodate pancreatic islets and provide them with a continuous, controlled and steady source of oxygen to prevent hypoxia-induced damage following transplantation. Hence, we made a collagen based cryogel bioscaffold which incorporated calcium peroxide (CPO) into its matrix. The optimal concentration of CPO integrated into bioscaffolds was 0.25wt.% and this generated oxygen at 0.21±0.02mM/day (day 1), 0.19±0.01mM/day (day 6), 0.13±0.03mM/day (day 14), and 0.14±0.02mM/day (day 21). Accordingly, islets seeded into cryogel-CPO bioscaffolds had a significantly higher viability and function compared to islets seeded into cryogel alone bioscaffolds or islets cultured alone on traditional cell culture plates; these findings were supported by data from quantitative computational modelling. When syngeneic islets were transplanted into the epididymal fat pad (EFP) of diabetic mice, our cryogel-0.25wt.%CPO bioscaffold improved islet function with diabetic animals re-establishing glycemic control. Mice transplanted with cryogel-0.25wt.%CPO bioscaffolds showed faster responses to intraperitoneal glucose injections and had a higher level of insulin content in their EFP compared to those transplanted with islets alone (P<0.05). Biodegradability studies predicted that our cryogel-CPO bioscaffolds will have long-lasting biostability for approximately 5 years (biodegradation rate: 16.00±0.65%/year). Long term implantation studies (i.e. 6 months) showed that our cryogel-CPO bioscaffold is biocompatible and integrated into the surrounding fat tissue with minimal adverse tissue reaction; this was further supported by no change in blood parameters (i.e. electrolyte, metabolic, chemistry and liver panels). Our novel oxygen-generating bioscaffold (i.e. cryogel-0.25wt.%CPO) therefore provides a biostable and biocompatible 3D microenvironment for islets which can facilitate islet survival and function at extra-hepatic sites of transplantation.
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Affiliation(s)
- MEHDI RAZAVI
- Interventional Regenerative Medicine and Imaging Laboratory, Stanford University School of Medicine, Department of Radiology, Palo Alto, California 94304, USA
- Biionix™ (Bionic Materials, Implants & Interfaces) Cluster, Department of Internal Medicine, College of Medicine, University of Central Florida, Orlando, Florida 32827, USA
| | - ROSITA PRIMAVERA
- Interventional Regenerative Medicine and Imaging Laboratory, Stanford University School of Medicine, Department of Radiology, Palo Alto, California 94304, USA
| | - BHAVESH D KEVADIYA
- Interventional Regenerative Medicine and Imaging Laboratory, Stanford University School of Medicine, Department of Radiology, Palo Alto, California 94304, USA
| | - JING WANG
- Interventional Regenerative Medicine and Imaging Laboratory, Stanford University School of Medicine, Department of Radiology, Palo Alto, California 94304, USA
| | - PETER BUCHWALD
- Diabetes Research Institute, Miller School of Medicine, University of Miami, Miami, Florida 33136, USA
| | - AVNESH S THAKOR
- Interventional Regenerative Medicine and Imaging Laboratory, Stanford University School of Medicine, Department of Radiology, Palo Alto, California 94304, USA
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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: 6] [Impact Index Per Article: 1.5] [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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Liu G, Fu M, Li F, Fu W, Zhao Z, Xia H, Niu Y. Tissue-engineered PLLA/gelatine nanofibrous scaffold promoting the phenotypic expression of epithelial and smooth muscle cells for urethral reconstruction. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 111:110810. [PMID: 32279818 DOI: 10.1016/j.msec.2020.110810] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2019] [Revised: 03/02/2020] [Accepted: 03/02/2020] [Indexed: 01/31/2023]
Abstract
The repair and regeneration of tissues using tissue-engineered scaffolds represent the ultimate goal of regenerative medicine. Despite rapid developments in the field, urethral tissue engineering methods are still insufficient to replicate natural urethral tissue because the bioactivity of existing scaffolds is inefficient, especially for large tissue defects, which require large tissue-engineered scaffolds. Here, we describe the efficiency of gelatine-functionalized, tubular nanofibrous scaffolds of poly(l-lactic acid) (PLLA) in regulating the phenotypic expression of epithelial cells (ECs) and smooth muscle cells (SMCs) for urethral reconstruction. Flexible PLLA/gelatine tubular nanofibrous scaffolds with hierarchical architecture were fabricated by electrospinning. The PLLA/gelatine nanofibrous scaffold exhibited enhanced hydrophilicity and significantly promoted the adhesion, oriented elongation, and proliferation of New Zealand rabbit autologous ECs and SMCs simultaneously. Compared with pure PLLA nanofibrous scaffold, PLLA/gelatine nanofibrous scaffolds upregulated the expression of keratin (AE1/AE3) in ECs and actin (α-SMA) in SMCs as well as the synthesis of elastin. Three months of in vivo scaffold replacement of New Zealand rabbit urethras indicated that a tubular cellularized PLLA/gelatine nanofibrous scaffold maintained urethral patency and facilitated oriented SMC remodeling, lumen epithelialization, and angiogenesis. Our observations showed the synergistic effects of nano-morphology and biochemical clues in the design of biomimetic scaffolds, which can effectively promote urethral regeneration.
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Affiliation(s)
- Guochang Liu
- Department of Pediatric Surgery, Guangdong Provincial Key Laboratory of Research in Structural Birth Defect Disease, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510623, Guangdong, China
| | - Ming Fu
- Department of Pediatric Surgery, Guangdong Provincial Key Laboratory of Research in Structural Birth Defect Disease, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510623, Guangdong, China
| | - Feng Li
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, China
| | - Wen Fu
- Department of Pediatric Surgery, Guangdong Provincial Key Laboratory of Research in Structural Birth Defect Disease, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510623, Guangdong, China
| | - Zhang Zhao
- Department of Pediatric Surgery, Guangdong Provincial Key Laboratory of Research in Structural Birth Defect Disease, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510623, Guangdong, China
| | - Huimin Xia
- Department of Pediatric Surgery, Guangdong Provincial Key Laboratory of Research in Structural Birth Defect Disease, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510623, Guangdong, China.
| | - Yuqing Niu
- Department of Pediatric Surgery, Guangdong Provincial Key Laboratory of Research in Structural Birth Defect Disease, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510623, Guangdong, China; State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430071, China.
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26
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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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Niu Y, Liu G, Chen C, Fu M, Fu W, Zhao Z, Xia H, Stadler FJ. Urethral reconstruction using an amphiphilic tissue-engineered autologous polyurethane nanofiber scaffold with rapid vascularization function. Biomater Sci 2020; 8:2164-2174. [DOI: 10.1039/c9bm01911a] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
We report the efficient application of a well-layered tubular amphiphilic nanofiber of a polyurethane copolymer (PU-ran) for the regulation the phenotypic expression of epithelial cells (ECs) and smooth muscle cells (SMCs) for vascularized urethral reconstruction.
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Affiliation(s)
- Yuqing Niu
- Department of Pediatric Surgery
- Guangzhou Institute of Pediatrics
- Guangzhou Women and Children's Medical Center
- Guangzhou Medical University
- Guangzhou 510623
| | - Guochang Liu
- Department of Pediatric Urology
- Guangzhou Women and Children's Medical Center
- Guangzhou Medical University
- Guangzhou 510623
- China
| | - Chuangbi Chen
- Nanshan District Key Lab for Biopolymers and Safety Evaluation
- Shenzhen Key Laboratory of Polymer Science and Technology
- Guangdong Research Center for Interfacial Engineering of Functional Materials
- College of Materials Science and Engineering
- Shenzhen University
| | - Ming Fu
- Department of Pediatric Urology
- Guangzhou Women and Children's Medical Center
- Guangzhou Medical University
- Guangzhou 510623
- China
| | - Wen Fu
- Department of Pediatric Urology
- Guangzhou Women and Children's Medical Center
- Guangzhou Medical University
- Guangzhou 510623
- China
| | - Zhang Zhao
- Department of Pediatric Urology
- Guangzhou Women and Children's Medical Center
- Guangzhou Medical University
- Guangzhou 510623
- China
| | - Huimin Xia
- Department of Pediatric Surgery
- Guangzhou Institute of Pediatrics
- Guangzhou Women and Children's Medical Center
- Guangzhou Medical University
- Guangzhou 510623
| | - Florian J. Stadler
- Nanshan District Key Lab for Biopolymers and Safety Evaluation
- Shenzhen Key Laboratory of Polymer Science and Technology
- Guangdong Research Center for Interfacial Engineering of Functional Materials
- College of Materials Science and Engineering
- Shenzhen University
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Wang C, Chen C, Guo M, Li B, Han F, Chen W. Stretchable collagen-coated polyurethane-urea hydrogel seeded with bladder smooth muscle cells for urethral defect repair in a rabbit model. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2019; 30:135. [PMID: 31802280 DOI: 10.1007/s10856-019-6342-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 11/16/2019] [Indexed: 06/10/2023]
Abstract
The major challenge to treat the clinical adverse effects of long-segment urethra is in achieving viable tissue substitution. The substituted construct's properties-such as its resilience, contraction, and ability to minimize scar-stenosis formation should be considered. In the present work, a unique polyurethane-urea (PUU) fibrous membrane is fabricated by electrospinning. Then PUU was coated by collagen and formed the elasticity hydrogel after immersed in collagen solution. Meanwhile, the cPUU hydrogel exhibited a fibrous microstructure. This cPUU hydrogel had outstanding stretching property with 404 ± 40% elongation at break compared with traditional hydrogels, which satisfied the requirement of urethra. The cPUU hydrogel also supported the adhesion and growth of bladder smooth-muscle cells (BSMCs) in natural state cell morphology. Urethral defects in New Zealand male rabbits were repaired with cPUU seeded with BSMCs in vivo. After three months, more smooth-surface area of reconstructed urethral tissues was observed in the cPUU hydrogel-BMSCs groups compared with that of the control group. The luminal patency and the incidence of complications-including calculus formation, urinary fistula, and urethral-stricture occurrence were significantly lower in the cPUU group compared with that of the control group. Hence, cPUU fibrous hydrogels are promising scaffolds for application in urological tissue engineering.
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Affiliation(s)
- Chengyuan Wang
- Department of Urology, The First Affiliated Hospital, Soochow University, Suzhou, Jiangsu, 215006, China
| | - Chunyang Chen
- Department of Urology, The First Affiliated Hospital, Soochow University, Suzhou, Jiangsu, 215006, China
| | - Mingyu Guo
- Orthopaedic Institute, College of Chemistry, Chemical Engineering and Material Science, Soochow University, Suzhou, Jiangsu, 215006, China
| | - Bin Li
- Orthopaedic Institute, College of Chemistry, Chemical Engineering and Material Science, Soochow University, Suzhou, Jiangsu, 215006, China.
| | - Fengxuan Han
- Orthopaedic Institute, College of Chemistry, Chemical Engineering and Material Science, Soochow University, Suzhou, Jiangsu, 215006, China.
| | - Weiguo Chen
- Department of Urology, The First Affiliated Hospital, Soochow University, Suzhou, Jiangsu, 215006, China.
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Culenova M, Bakos D, Ziaran S, Bodnarova S, Varga I, Danisovic L. Bioengineered Scaffolds as Substitutes for Grafts for Urethra Reconstruction. MATERIALS 2019; 12:ma12203449. [PMID: 31652498 PMCID: PMC6829564 DOI: 10.3390/ma12203449] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Revised: 10/16/2019] [Accepted: 10/18/2019] [Indexed: 12/25/2022]
Abstract
Urethral defects originating from congenital malformations, trauma, inflammation or carcinoma still pose a great challenge to modern urology. Recent therapies have failed many times and have not provided the expected results. This negatively affects patients' quality of life. By combining cells, bioactive molecules, and biomaterials, tissue engineering can provide promising treatment options. This review focused on scaffold systems for urethra reconstruction. We also discussed different technologies, such as electrospinning and 3D bioprinting which provide great possibility for the preparation of a hollow structure with well-defined architecture.
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Affiliation(s)
- Martina Culenova
- Institute of Medical Biology, Genetics and Clinical Genetics, Faculty of Medicine, Comenius University, Sasinkova 4, 811 08 Bratislava, Slovakia.
| | - Dusan Bakos
- International Centre for Applied Research and Sustainable Technology, Jamnickeho 19, 841 04 Bratislava, Slovakia.
| | - Stanislav Ziaran
- Department of Urology, Faculty of Medicine, Comenius University, Limbova 5, 833 05 Bratislava, Slovakia.
| | - Simona Bodnarova
- Department of Biomedical Engineering and Measurement, Faculty of Mechanical Engineering, Technical University of Kosice, Letna 9, 042 00 Kosice, Slovakia.
| | - Ivan Varga
- Institute of Histology and Embryology, Faculty of Medicine, Comenius University, Sasinkova 4, 811 08 Bratislava, Slovakia.
| | - Lubos Danisovic
- Institute of Medical Biology, Genetics and Clinical Genetics, Faculty of Medicine, Comenius University, Sasinkova 4, 811 08 Bratislava, Slovakia.
- Regenmed Ltd., Medena 29, 811 01 Bratislava, Slovakia.
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Wang X, Li Y, Zhao Z, Meng Y, Bian J, Bao R, Zhu K, Yang T. IGFBP7 regulates sepsis-induced epithelial-mesenchymal transition through ERK1/2 signaling. Acta Biochim Biophys Sin (Shanghai) 2019; 51:799-806. [PMID: 31287495 DOI: 10.1093/abbs/gmz072] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Indexed: 01/20/2023] Open
Abstract
The epithelial-mesenchymal transition (EMT) process results in fibrosis of renal tubular epithelial cells and is of great importance in the development of acute kidney injury (AKI). Urinary IGF-binding protein-7 (IGFBP7) was obviously increased in AKI and is considered to be a biomarker for AKI. However, whether it has an effect on the inhibition of lipopolysaccharide (LPS)-induced EMT in human HK2 cells and on that of cecal ligation and puncture (CLP)-induced EMT in human HK2 cells and in mice remains to be elucidated. Western blot analysis was performed to examine the phosphorylation of ERK1/2 level and expressions of IGFBP7, ERK1/2, EMT markers, such as E-cadherin, α-SMA, and vimentin, and EMT regulatory factors, such as Snail, transforming growth factor-β1 (TGF-β1), and connective tissue growth factor (CTGF). The levels of IGFBP7, TGF-β1, and CTGF were detected by enzyme linked immunosorbent assay (ELISA). Concentrations of creatinine (Cr), blood urea nitrogen (BUN), and albumin (ALB) were measured by biochemical analysis. Here, we found that LPS promoted EMT and ERK1/2 activation in HK2 cells, which were inhibited by silencing of IGFBP7. Furthermore, IGFBP7 overexpression significantly increased EMT and ERK1/2 activation in HK2 cells, which were inhibited by ERK1/2 signaling inhibitor PD98059. IGFBP7 knockdown effectively attenuated renal fibrosis, concentrations of Cr, BUN and ALB, and activation of ERK1/2 signaling in CLP-induced mice. These results suggest that inhibiting IGFBP7 can effectively protect the renal tubular epithelial cells from EMT induced by LPS or CLP both in vitro and in vivo, which may be associated with inactivation of ERK1/2 signaling.
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Affiliation(s)
- Xiaolin Wang
- Faculty of Anesthesiology, Changhai Hospital, Naval Medical University, Shanghai, China
| | - Yan Li
- Faculty of Anesthesiology, Changhai Hospital, Naval Medical University, Shanghai, China
| | - Zhenzhen Zhao
- Faculty of Anesthesiology, Changhai Hospital, Naval Medical University, Shanghai, China
| | - Yan Meng
- Faculty of Anesthesiology, Changhai Hospital, Naval Medical University, Shanghai, China
| | - Jinjun Bian
- Faculty of Anesthesiology, Changhai Hospital, Naval Medical University, Shanghai, China
| | - Rui Bao
- Faculty of Anesthesiology, Changhai Hospital, Naval Medical University, Shanghai, China
| | - Kaimin Zhu
- Faculty of Anesthesiology, Changhai Hospital, Naval Medical University, Shanghai, China
- Department of Intensive Care Unit, Shanghai General Hospital of Chinese Armed Police Force, Shanghai, China
| | - Tao Yang
- Faculty of Anesthesiology, Changhai Hospital, Naval Medical University, Shanghai, China
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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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Shinchi M, Kushibiki T, Mayumi Y, Ito K, Asano T, Ishihara M, Horiguchi A. Insulin-like growth factor 1 sustained-release collagen on urethral catheter prevents stricture after urethral injury in a rabbit model. Int J Urol 2019; 26:572-577. [PMID: 30806004 DOI: 10.1111/iju.13931] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Accepted: 01/28/2019] [Indexed: 12/19/2022]
Abstract
OBJECTIVES To evaluate the preventive effect of an insulin-like growth factor 1 sustained-release collagen urethral catheter on urethral stricture after urethral injury in a rabbit model. METHODS We made urethral catheters coated either with insulin-like growth factor 1 impregnated collagen or with only collagen, and we divided 19 male Japanese white rabbits into three groups according to the kind of catheter inserted immediately after the rabbit's urethra was injured by electrocoagulation. Group 1 (n = 7) had a catheter coated with insulin-like growth factor 1 impregnated collagen inserted; group 2 (n = 7) had a catheter coated with only collagen inserted; and group 3 (n = 5) had an uncoated catheter inserted. A total of 14 days later, the injured urethras were evaluated by urethrography and urethroscopy, and were also histologically examined. RESULTS Urethrography showed that the ratio of the urethral lumen diameter in injured urethra to that in normal urethra was the largest in group 1 (P < 0.0001). In addition, five of the seven rabbits in group 1 (71.4%) had a urethral lumen large enough for passage of a urethroscope, a fraction larger than the corresponding fractions in groups 2 (57.1%) and 3 (20%). On histological analysis, the injured area not covered with regenerated urethral epithelium tended to be smaller in group 1 than the other two groups, but the mean difference was not significant (P = 0.19). CONCLUSIONS An insulin-like growth factor 1 sustained-release collagen urethral catheter significantly improves wound healing and prevents urethral stricture after urethral injury.
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Affiliation(s)
- Masayuki Shinchi
- Department of Urology, National Defense Medical College, Tokorozawa, Saitama, Japan
| | - Toshihiro Kushibiki
- Department of Medical Engineering, National Defense Medical College, Tokorozawa, Saitama, Japan
| | - Yoshine Mayumi
- Department of Medical Engineering, National Defense Medical College, Tokorozawa, Saitama, Japan
| | - Keiichi Ito
- Department of Urology, National Defense Medical College, Tokorozawa, Saitama, Japan
| | - Tomohiko Asano
- Department of Urology, National Defense Medical College, Tokorozawa, Saitama, Japan
| | - Miya Ishihara
- Department of Medical Engineering, National Defense Medical College, Tokorozawa, Saitama, Japan
| | - Akio Horiguchi
- Department of Urology, National Defense Medical College, Tokorozawa, Saitama, Japan
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33
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Larsson HM. Is tissue engineering of patient-specific oral mucosa grafts the future of urethral reconstruction? EBioMedicine 2017; 24:30-31. [PMID: 28899606 PMCID: PMC5652003 DOI: 10.1016/j.ebiom.2017.09.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 09/06/2017] [Indexed: 11/18/2022] Open
Affiliation(s)
- Hans M Larsson
- Institute of Bioengineering, École Polytechnique Fédérale de Lausanne, Switzerland.
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Žiaran S, Galambošová M, Danišovič L. Tissue engineering of urethra: Systematic review of recent literature. Exp Biol Med (Maywood) 2017; 242:1772-1785. [PMID: 28893083 DOI: 10.1177/1535370217731289] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
The purpose of this article was to perform a systematic review of the recent literature on urethral tissue engineering. A total of 31 articles describing the use of tissue engineering for urethra reconstruction were included. The obtained results were discussed in three groups: cells, scaffolds, and clinical results of urethral reconstructions using these components. Stem cells of different origin were used in many experimental studies, but only autologous urothelial cells, fibroblasts, and keratinocytes were applied in clinical trials. Natural and synthetic scaffolds were studied in the context of urethral tissue engineering. The main advantage of synthetic ones is the fact that they can be obtained in unlimited amount and modified by different techniques, but scaffolds of natural origin normally contain chemical groups and bioactive proteins which increase the cell attachment and may promote the cell proliferation and differentiation. The most promising are smart scaffolds delivering different bioactive molecules or those that can be tubularized. In two clinical trials, only onlay-fashioned transplants were used for urethral reconstruction. However, the very promising results were obtained from animal studies where tubularized scaffolds, both non-seeded and cell-seeded, were applied. Impact statement The main goal of this article was to perform a systematic review of the recent literature on urethral tissue engineering. It summarizes the most recent information about cells, seeded or non-seeded scaffolds and clinical application with respect to regeneration of urethra.
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Affiliation(s)
- Stanislav Žiaran
- 1 Department of Urology, Faculty of Medicine, Comenius University in Bratislava, Bratislava 833 05, Slovak Republic
| | - Martina Galambošová
- 2 Institute of Medical Biology, Genetics and Clinical Genetics, Faculty of Medicine, Comenius University in Bratislava, Bratislava 811 08, Slovak Republic
| | - L'uboš Danišovič
- 2 Institute of Medical Biology, Genetics and Clinical Genetics, Faculty of Medicine, Comenius University in Bratislava, Bratislava 811 08, Slovak Republic.,3 Regenmed Ltd, Bratislava 811 02, Slovak Republic
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Del Valle LJ, Díaz A, Puiggalí J. Hydrogels for Biomedical Applications: Cellulose, Chitosan, and Protein/Peptide Derivatives. Gels 2017; 3:E27. [PMID: 30920524 PMCID: PMC6318613 DOI: 10.3390/gels3030027] [Citation(s) in RCA: 99] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Revised: 07/09/2017] [Accepted: 07/10/2017] [Indexed: 12/21/2022] Open
Abstract
Hydrogels based on polysaccharide and protein natural polymers are of great interest in biomedical applications and more specifically for tissue regeneration and drug delivery. Cellulose, chitosan (a chitin derivative), and collagen are probably the most important components since they are the most abundant natural polymers on earth (cellulose and chitin) and in the human body (collagen). Peptides also merit attention because their self-assembling properties mimic the proteins that are present in the extracellular matrix. The present review is mainly focused on explaining the recent advances on hydrogels derived from the indicated polymers or their combinations. Attention has also been paid to the development of hydrogels for innovative biomedical uses. Therefore, smart materials displaying stimuli responsiveness and having shape memory properties are considered. The use of micro- and nanogels for drug delivery applications is also discussed, as well as the high potential of protein-based hydrogels in the production of bioactive matrices with recognition ability (molecular imprinting). Finally, mention is also given to the development of 3D bioprinting technologies.
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Affiliation(s)
- Luís J Del Valle
- Barcelona Research Center for Multiscale Science and Engineering, Universitat Politècnica de Catalunya, Escola d'Enginyeria de Barcelona Est-EEBE, c/Eduard Maristany 10-14, Barcelona 08019, Spain.
| | - Angélica Díaz
- Barcelona Research Center for Multiscale Science and Engineering, Universitat Politècnica de Catalunya, Escola d'Enginyeria de Barcelona Est-EEBE, c/Eduard Maristany 10-14, Barcelona 08019, Spain.
| | - Jordi Puiggalí
- Barcelona Research Center for Multiscale Science and Engineering, Universitat Politècnica de Catalunya, Escola d'Enginyeria de Barcelona Est-EEBE, c/Eduard Maristany 10-14, Barcelona 08019, Spain.
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Fabrication and evaluation of thermosensitive chitosan/collagen/α, β-glycerophosphate hydrogels for tissue regeneration. Carbohydr Polym 2017; 167:145-157. [DOI: 10.1016/j.carbpol.2017.03.053] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 03/11/2017] [Accepted: 03/15/2017] [Indexed: 11/18/2022]
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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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Zhao Y, Xiao Z, Chen B, Dai J. The neuronal differentiation microenvironment is essential for spinal cord injury repair. Organogenesis 2017; 13:63-70. [PMID: 28598297 DOI: 10.1080/15476278.2017.1329789] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Spinal cord injury (SCI) often leads to substantial disability due to loss of motor function and sensation below the lesion. Neural stem cells (NSCs) are a promising strategy for SCI repair. However, NSCs rarely differentiate into neurons; they mostly differentiate into astrocytes because of the adverse microenvironment present after SCI. We have shown that myelin-associated inhibitors (MAIs) inhibited neuronal differentiation of NSCs. Given that MAIs activate epidermal growth factor receptor (EGFR) signaling, we used a collagen scaffold-tethered anti-EGFR antibody to attenuate the inhibitory effects of MAIs and create a neuronal differentiation microenvironment for SCI repair. The collagen scaffold modified with anti-EGFR antibody prevented the inhibition of NSC neuronal differentiation by myelin. After transplantation into completely transected SCI animals, the scaffold-linked antibodies induced production of nascent neurons from endogenous and transplanted NSCs, which rebuilt the neuronal relay by forming connections with each other or host neurons to transmit electrophysiological signals and promote functional recovery. Thus, a scaffold-based strategy for rebuilding the neuronal differentiation microenvironment could be useful for SCI repair.
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Affiliation(s)
- Yannan Zhao
- a State Key Laboratory of Molecular Developmental Biology , Institute of Genetics and Developmental Biology, Chinese Academy of Sciences , Beijing , China
| | - Zhifeng Xiao
- a State Key Laboratory of Molecular Developmental Biology , Institute of Genetics and Developmental Biology, Chinese Academy of Sciences , Beijing , China
| | - Bing Chen
- a State Key Laboratory of Molecular Developmental Biology , Institute of Genetics and Developmental Biology, Chinese Academy of Sciences , Beijing , China
| | - Jianwu Dai
- a State Key Laboratory of Molecular Developmental Biology , Institute of Genetics and Developmental Biology, Chinese Academy of Sciences , Beijing , China
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Zarifpour M, Andersson KE, Kelkar SS, Mohs A, Mendelsohn C, Schneider K, Marini F, Christ GJ. Characterization of a Murine Model of Bioequivalent Bladder Wound Healing and Repair Following Subtotal Cystectomy. Biores Open Access 2017; 6:35-45. [PMID: 28560089 PMCID: PMC5439456 DOI: 10.1089/biores.2017.0011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Previous work demonstrated restoration of a bioequivalent bladder within 8 weeks of removing the majority of the bladder (subtotal cystectomy or STC) in rats. The goal of the present study was to extend our investigations of bladder repair to the murine model, to harness the power of mouse genetics to delineate the cellular and molecular mechanisms responsible for the observed robust bladder regrowth. Female C57 black mice underwent STC, and at 4, 8, and 12 weeks post-STC, bladder repair and function were assessed via cystometry, ex vivo pharmacologic organ bath studies, and T2-weighted magnetic resonance imaging (MRI). Histology was also performed to measure bladder wall thickness. We observed a time-dependent increase in bladder capacity (BC) following STC, such that 8 and 12 weeks post-STC, BC and micturition volumes were indistinguishable from those of age-matched non-STC controls and significantly higher than observed at 4 weeks. MRI studies confirmed that bladder volume was indistinguishable within 3 months (11 weeks) post-STC. Additionally, bladders emptied completely at all time points studied (i.e., no increases in residual volume), consistent with functional bladder repair. At 8 and 12 weeks post-STC, there were no significant differences in bladder wall thickness or in the different components (urothelium, lamina propria, or smooth muscle layers) of the bladder wall compared with age-matched control animals. The maximal contractile response to pharmacological activation and electrical field stimulation increased over time in isolated tissue strips from repaired bladders but remained lower at all time points compared with controls. We have established and validated a murine model for the study of de novo organ repair that will allow for further mechanistic studies of this phenomenon after, for example, genetic manipulation.
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Affiliation(s)
- Mona Zarifpour
- Wake Forest Institute for Regenerative Medicine, Winston-Salem, North Carolina
| | - Karl-Erik Andersson
- Wake Forest Institute for Regenerative Medicine, Winston-Salem, North Carolina
| | - Sneha S Kelkar
- Wake Forest Institute for Regenerative Medicine, Winston-Salem, North Carolina
| | - Aaron Mohs
- Wake Forest Institute for Regenerative Medicine, Winston-Salem, North Carolina.,Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, Nebraska
| | - Cathy Mendelsohn
- Department of Urology, Pathology and Cell Biology, Genetics and Development, Columbia University, New York, New York
| | - Kerry Schneider
- Department of Urology, Pathology and Cell Biology, Genetics and Development, Columbia University, New York, New York
| | - Frank Marini
- Wake Forest Institute for Regenerative Medicine, Winston-Salem, North Carolina
| | - George J Christ
- Wake Forest Institute for Regenerative Medicine, Winston-Salem, North Carolina.,Department of Biomedical Engineering and Orthopaedic Surgery, University of Virginia, Charlottesville, Virginia.,Laboratory of Regenerative Therapeutics, University of Virginia, Charlottesville, Virginia
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40
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Kajbafzadeh AM, Abbasioun R, Sabetkish S, Sabetkish N, Rahmani P, Tavakkolitabassi K, Arshadi H. Future Prospects for Human Tissue Engineered Urethra Transplantation: Decellularization and Recellularization-Based Urethra Regeneration. Ann Biomed Eng 2017; 45:1795-1806. [PMID: 28536786 DOI: 10.1007/s10439-017-1857-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Accepted: 05/17/2017] [Indexed: 01/03/2023]
Abstract
To evaluate the histological characteristics of decellularized human urethra after transplantation into the rat omentum and compare in vivo cell seeding with perfusion-based and cell sheet urethral regeneration. Eight adult human male urethras accompanied with the surrounding corpus spongiosum were obtained. The tissues were decellularized with detergent-based method. The efficacy of decellularization and extracellular matrix preservation was evaluated by several techniques. Decellularized scaffolds were transplanted into the omentum of 12 male rats and located into the scrotum. Biopsies were taken 1, 3, and 6 months postoperatively to assess the natural recellularization. Mesenchymal stem cells obtained from preputial tissue were seeded with perfusion-based and cell sheet techniques as well. Immunohistochemical staining with α-actin, cytokeratin AE1/AE3, synaptophysin, and CD31 antibodies were performed. Removal of nuclear components and preservation of biomechanical properties was confirmed. In-vivo recellularization revealed promising results in progressive angiogenesis and cell seeding of epithelium-like cells in the lining of the urethra as well as smooth muscle cells in the wall structure. In-vitro urethral regeneration revealed that cell sheet engineering was the technique of choice compared to perfusion-based technique. This study may paw the road for clinical application of acellular urethral matrix with the surrounding corpus spongiosum in urological reconstructive surgery.
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Affiliation(s)
- Abdol-Mohammad Kajbafzadeh
- Pediatric Urology and Regenerative Medicine Research Center, Section of Tissue Engineering and Stem Cells Therapy, Children's Hospital Medical Center, Tehran University of Medical Sciences, No. 62, Dr. Gharib's Street, Keshavarz Boulevard, Tehran, 1419433151, Iran.
| | - Reza Abbasioun
- Pediatric Urology and Regenerative Medicine Research Center, Section of Tissue Engineering and Stem Cells Therapy, Children's Hospital Medical Center, Tehran University of Medical Sciences, No. 62, Dr. Gharib's Street, Keshavarz Boulevard, Tehran, 1419433151, Iran
| | - Shabnam Sabetkish
- Pediatric Urology and Regenerative Medicine Research Center, Section of Tissue Engineering and Stem Cells Therapy, Children's Hospital Medical Center, Tehran University of Medical Sciences, No. 62, Dr. Gharib's Street, Keshavarz Boulevard, Tehran, 1419433151, Iran
| | - Nastaran Sabetkish
- Pediatric Urology and Regenerative Medicine Research Center, Section of Tissue Engineering and Stem Cells Therapy, Children's Hospital Medical Center, Tehran University of Medical Sciences, No. 62, Dr. Gharib's Street, Keshavarz Boulevard, Tehran, 1419433151, Iran
| | - Parvin Rahmani
- Pediatric Urology and Regenerative Medicine Research Center, Section of Tissue Engineering and Stem Cells Therapy, Children's Hospital Medical Center, Tehran University of Medical Sciences, No. 62, Dr. Gharib's Street, Keshavarz Boulevard, Tehran, 1419433151, Iran
| | - Kamyar Tavakkolitabassi
- Department of Urology and Renal Transplantation, Imam Reza Hospital, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hamid Arshadi
- Pediatric Urology and Regenerative Medicine Research Center, Section of Tissue Engineering and Stem Cells Therapy, Children's Hospital Medical Center, Tehran University of Medical Sciences, No. 62, Dr. Gharib's Street, Keshavarz Boulevard, Tehran, 1419433151, Iran
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Addi C, Murschel F, De Crescenzo G. Design and Use of Chimeric Proteins Containing a Collagen-Binding Domain for Wound Healing and Bone Regeneration. TISSUE ENGINEERING PART B-REVIEWS 2016; 23:163-182. [PMID: 27824290 DOI: 10.1089/ten.teb.2016.0280] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Collagen-based biomaterials are widely used in the field of tissue engineering; they can be loaded with biomolecules such as growth factors (GFs) to modulate the biological response of the host and thus improve its potential for regeneration. Recombinant chimeric GFs fused to a collagen-binding domain (CBD) have been reported to improve their bioavailability and the host response, especially when combined with an appropriate collagen-based biomaterial. This review first provides an extensive description of the various CBDs that have been fused to proteins, with a focus on the need for accurate characterization of their interaction with collagen. The second part of the review highlights the benefits of various CBD/GF fusion proteins that have been designed for wound healing and bone regeneration.
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Affiliation(s)
- Cyril Addi
- Biomedical Science and Technology Research Group, Bio-P2 Research Unit , Department of Chemical Engineering, École Polytechnique de Montréal, Montréal, Canada
| | - Frederic Murschel
- Biomedical Science and Technology Research Group, Bio-P2 Research Unit , Department of Chemical Engineering, École Polytechnique de Montréal, Montréal, Canada
| | - Gregory De Crescenzo
- Biomedical Science and Technology Research Group, Bio-P2 Research Unit , Department of Chemical Engineering, École Polytechnique de Montréal, Montréal, Canada
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Alarçin E, Guan X, Kashaf SS, Elbaradie K, Yang H, Jang HL, Khademhosseini A. Recreating composition, structure, functionalities of tissues at nanoscale for regenerative medicine. Regen Med 2016; 11:849-858. [PMID: 27885900 PMCID: PMC5561804 DOI: 10.2217/rme-2016-0120] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Accepted: 10/18/2016] [Indexed: 12/17/2022] Open
Abstract
Nanotechnology offers significant potential in regenerative medicine, specifically with the ability to mimic tissue architecture at the nanoscale. In this perspective, we highlight key achievements in the nanotechnology field for successfully mimicking the composition and structure of different tissues, and the development of bio-inspired nanotechnologies and functional nanomaterials to improve tissue regeneration. Numerous nanomaterials fabricated by electrospinning, nanolithography and self-assembly have been successfully applied to regenerate bone, cartilage, muscle, blood vessel, heart and bladder tissue. We also discuss nanotechnology-based regenerative medicine products in the clinic for tissue engineering applications, although so far most of them are focused on bone implants and fillers. We believe that recent advances in nanotechnologies will enable new applications for tissue regeneration in the near future.
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Affiliation(s)
- Emine Alarçin
- Division of Biomedical Engineering, Department of Medicine, Biomaterials Innovation Research Center, Harvard Medical School, Brigham & Women's Hospital, Boston, MA 02139, USA
- Division of Health Sciences & Technology, Harvard-Massachusetts Institute of Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Marmara University, Istanbul 34668, Turkey
| | - Xiaofei Guan
- Division of Biomedical Engineering, Department of Medicine, Biomaterials Innovation Research Center, Harvard Medical School, Brigham & Women's Hospital, Boston, MA 02139, USA
- Division of Health Sciences & Technology, Harvard-Massachusetts Institute of Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115, USA
| | - Sara Saheb Kashaf
- Division of Biomedical Engineering, Department of Medicine, Biomaterials Innovation Research Center, Harvard Medical School, Brigham & Women's Hospital, Boston, MA 02139, USA
- Division of Health Sciences & Technology, Harvard-Massachusetts Institute of Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Khairat Elbaradie
- Department of Zoology, Faculty of Science, Tanta University, Tanta 31527, Egypt
| | - Huazhe Yang
- Division of Biomedical Engineering, Department of Medicine, Biomaterials Innovation Research Center, Harvard Medical School, Brigham & Women's Hospital, Boston, MA 02139, USA
- Division of Health Sciences & Technology, Harvard-Massachusetts Institute of Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Hae Lin Jang
- Division of Biomedical Engineering, Department of Medicine, Biomaterials Innovation Research Center, Harvard Medical School, Brigham & Women's Hospital, Boston, MA 02139, USA
- Division of Health Sciences & Technology, Harvard-Massachusetts Institute of Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115, USA
| | - Ali Khademhosseini
- Division of Biomedical Engineering, Department of Medicine, Biomaterials Innovation Research Center, Harvard Medical School, Brigham & Women's Hospital, Boston, MA 02139, USA
- Division of Health Sciences & Technology, Harvard-Massachusetts Institute of Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115, USA
- Department of Bioindustrial Technologies, College of Animal Bioscience & Technology, Konkuk University, Seoul 143–701, Republic of Korea
- Department of Physics, King Abdulaziz University, Jeddah 21569, Saudi Arabia
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Pinnagoda K, Larsson HM, Vythilingam G, Vardar E, Engelhardt EM, Thambidorai RC, Hubbell JA, Frey P. Engineered acellular collagen scaffold for endogenous cell guidance, a novel approach in urethral regeneration. Acta Biomater 2016; 43:208-217. [PMID: 27450527 DOI: 10.1016/j.actbio.2016.07.033] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Revised: 07/12/2016] [Accepted: 07/18/2016] [Indexed: 11/18/2022]
Abstract
UNLABELLED The treatment of congenital malformations or injuries of the urethra using existing autologous tissues can be associated with post-operative complications. Using rat-tail collagen, we have engineered an acellular high-density collagen tube. These tubes were made of 2 layers and they could sustain greater burst pressures than the monolayered tubes. Although it remains a weak material this 2 layered tube could be sutured to the native urethra. In 20 male New Zealand white rabbits, 2cm long grafts were sutured in place after subtotal excision of the urethra. This long-term study was performed in Lausanne (Switzerland) and in Kuala Lumpur (Malaysia). No catheter was placed post-operatively. All rabbits survived the surgical implantation. The animals were evaluated at 1, 3, 6, and 9months by contrast voiding cysto-urethrography, histological examination and immunohistochemistry. Spontaneous re-population of urothelial and smooth muscle cells on all grafts was demonstrated. Cellular organization increased with time, however, 20% of both fistula and stenosis could be observed post-operatively. This off-the shelf scaffold with a promising urethral regeneration has a potential for clinical application. STATEMENT OF SIGNIFICANCE In this study we have tissue engineered a novel cell free tubular collagen based scaffold and used it as a urethral graft in a rabbit model. The novelty of our technique is that the tube can be sutured. Testing showed better burst pressures and the grafts could then be successfully implanted after a urethral excision. This long term study demonstrated excellent biocompatibility of the 2cm graft and gradual regeneration with time, challenging the current literature. Finally, the main impact is that we describe an off-the-shelf and cost-effective product with comparable surgical outcome to the cellular grafts.
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Affiliation(s)
- Kalitha Pinnagoda
- Department of Pediatric Surgery, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne, Switzerland; Laboratory for Regenerative Medicine and Pharmacobiology, Institute for Bioengineering, School of Life Sciences and School of Engineering, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Hans M Larsson
- Department of Pediatrics, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne, Switzerland; Laboratory for Regenerative Medicine and Pharmacobiology, Institute for Bioengineering, School of Life Sciences and School of Engineering, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Ganesh Vythilingam
- Department of Surgery, Faculty of Medicine, University Malaya, Kuala Lumpur, Malaysia; Laboratory for Regenerative Medicine and Pharmacobiology, Institute for Bioengineering, School of Life Sciences and School of Engineering, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Elif Vardar
- Laboratory for Regenerative Medicine and Pharmacobiology, Institute for Bioengineering, School of Life Sciences and School of Engineering, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Eva-Maria Engelhardt
- Laboratory for Regenerative Medicine and Pharmacobiology, Institute for Bioengineering, School of Life Sciences and School of Engineering, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | | | - Jeffrey A Hubbell
- Laboratory for Regenerative Medicine and Pharmacobiology, Institute for Bioengineering, School of Life Sciences and School of Engineering, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland; Institute for Molecular Engineering, University of Chicago, Chicago, IL, USA
| | - Peter Frey
- Laboratory for Regenerative Medicine and Pharmacobiology, Institute for Bioengineering, School of Life Sciences and School of Engineering, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.
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Wet-laid soy fiber reinforced hydrogel scaffold: Fabrication, mechano-morphological and cell studies. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 63:308-16. [DOI: 10.1016/j.msec.2016.02.078] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 02/06/2016] [Accepted: 02/29/2016] [Indexed: 11/21/2022]
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Li D, Deng L, Yang Z, Xie X, Kang P, Tan Z. Antigen-free bovine cancellous bone loaded with recombinant human bone morphogenetic protein-2 for the repair of tibial bone defects in goat model. J Biomater Appl 2016; 30:1322-33. [PMID: 26801475 DOI: 10.1177/0885328215627796] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Antigen-free bovine cancellous bone has good performances of porous network structures and mechanics with antigen extracted. To develop a bioactive scaffold for enhancing bone repair and evaluate its biological property, rhBMP-2 loaded with antigen-free bovine cancellous bone was used to treat tibial bone defect. Twenty-four healthy adult goats were chosen to establish goat defects model and randomly divided into four groups. The goats were treated with rhBMP-2/antigen-free bovine cancellous bone scaffolds (group A), autogenous cancellous bone graft (group B), porous tricalciumphosphate scaffolds (group C) and nothing (group D). Animals were evaluated with radiological and histological methods at 4, 8 and 12 weeks after surgery. The gray value of radiographs was used to evaluate the healing of the defects, which revealed that the group A had a better outcome of defect healing compared with group C at 4, 8 and 12 weeks, respectively (p < 0.05), while the difference between groups A and B was without significance at each time (p > 0.05). The newly formed bone area was calculated from histological sections, and the results indicated that the amount of new bone in group A increased significantly compared with that in group C (p < 0.05) but was similar to that in group B (p > 0.05) at 4, 8 and 12 weeks, respectively. In addition, the expression of collagen I and vascular endothelial growth factor by real-time polymerase chain reaction at 12 weeks in group A was significantly higher than that in group C (p = 0.034, p = 0.032, respectively), but no significant differences were found when compared with that in group B (p = 0.36, p = 0.54, respectively). At the same time, group C presented better results than group D on bone defects healing. Therefore, the composites of antigen-free bovine cancellous bone loaded with rhBMP-2 have a good osteoinductive activity and capacity to promote the repair of bone defects.
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Affiliation(s)
- Donghai Li
- Department of Orthopaedics, West China Hospital, Sichuan University, Chengdu, People's Republic of China
| | - Liqing Deng
- Department of Orthopaedics of Cheng Ban hospital, the Branch of West China Hospital, Sichuan University, Chengdu, People's Republic of China
| | - Zhouyuan Yang
- Department of Orthopaedics, West China Hospital, Sichuan University, Chengdu, People's Republic of China
| | - Xiaowei Xie
- Department of Orthopaedics, West China Hospital, Sichuan University, Chengdu, People's Republic of China
| | - Pengde Kang
- Department of Orthopaedics, West China Hospital, Sichuan University, Chengdu, People's Republic of China
| | - Zhen Tan
- Department of Orthopaedics, West China Hospital, Sichuan University, Chengdu, People's Republic of China
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