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Chen L, Zeng Z, Li W. Poly(acrylic acid)-Assisted Intrafibrillar Mineralization of Type I Collagen: A Review. Macromol Rapid Commun 2023; 44:e2200827. [PMID: 36662644 DOI: 10.1002/marc.202200827] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 01/06/2023] [Indexed: 01/21/2023]
Abstract
The mineralization of type I collagen is a biological process occurring in vertebrates by which some hard tissues such as bone and dentin are constructed. Due to the extensive clinical needs for bone defect repair and remineralization of mineral-depleted dentin, biomimetic mineralization of collagen is attracting more and more interests. Synthetic analogs of noncollagenous proteins are necessary for directing the in vitro mineralization. In this paper, the function and mechanism of poly(acrylic acid) (PAA) in regulating the mineralization, especially intrafibrillar mineralization (IM) of collagen are reviewed. As two mineralization patterns (extrafibrillar and intrafibrillar) co-exist in natural hard tissues, differences between them in terms of microstructure, biodegradation, cytocompatibility, osteoinduction in vitro, and performance in vivo are systematically compared. Then the roles of PAA in biomimetic collagen IM within one-analog and two-analog systems are discussed, respectively. Moreover, mineralization of some self-mineralizable collagen matrices is described. Due to the interactions between collagen and PAA play a crucial role in the processes of collagen mineralization, some reference researches are also provided involving the collagen/PAA interactions in some other fields. Finally, this review is ended with an outlook for future potential improvements based on the collection of existing bottlenecks in this field.
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Affiliation(s)
- Lei Chen
- Department of Bio-medical Engineering, Southern University of Science and Technology, Shenzhen, 518055, P. R. China
| | - Zhiyong Zeng
- Key Laboratory of Eco-Textiles, Ministry of Education, College of Textile Science and Engineering, Jiangnan University, Wuxi, 214122, P. R. China
| | - Wenbing Li
- Key Laboratory of Eco-Textiles, Ministry of Education, College of Textile Science and Engineering, Jiangnan University, Wuxi, 214122, P. R. China
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Tissue Engineering and Regenerative Medicine in Pediatric Urology: Urethral and Urinary Bladder Reconstruction. Int J Mol Sci 2022; 23:ijms23126360. [PMID: 35742803 PMCID: PMC9224288 DOI: 10.3390/ijms23126360] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 06/03/2022] [Accepted: 06/05/2022] [Indexed: 11/22/2022] Open
Abstract
In the case of pediatric urology there are several congenital conditions, such as hypospadias and neurogenic bladder, which affect, respectively, the urethra and the urinary bladder. In fact, the gold standard consists of a urethroplasty procedure in the case of urethral malformations and enterocystoplasty in the case of urinary bladder disorders. However, both surgical procedures are associated with severe complications, such as fistulas, urethral strictures, and dehiscence of the repair or recurrence of chordee in the case of urethroplasty, and metabolic disturbances, stone formation, urine leakage, and chronic infections in the case of enterocystoplasty. With the aim of overcoming the issue related to the lack of sufficient and appropriate autologous tissue, increasing attention has been focused on tissue engineering. In this review, both the urethral and the urinary bladder reconstruction strategies were summarized, focusing on pediatric applications and evaluating all the biomaterials tested in both animal models and patients. Particular attention was paid to the capability for tissue regeneration in dependence on the eventual presence of seeded cell and growth factor combinations in several types of scaffolds. Moreover, the main critical features needed for urinary tissue engineering have been highlighted and specifically focused on for pediatric application.
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Chen H, Xue L, Gong G, Pan J, Wang X, Zhang Y, Guo J, Qin L. Collagen-based materials in reproductive medicine and engineered reproductive tissues. JOURNAL OF LEATHER SCIENCE AND ENGINEERING 2022. [DOI: 10.1186/s42825-021-00075-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
AbstractCollagen, the main component of mammal skin, has been traditionally used in leather manufacturing for thousands of years due to its diverse physicochemical properties. Collagen is the most abundant protein in mammals and the main component of the extracellular matrix (ECM). The properties of collagen also make it an ideal building block for the engineering of materials for a range of biomedical applications. Reproductive medicine, especially human fertility preservation strategies and reproductive organ regeneration, has attracted significant attention in recent years as it is key in resolving the growing social concern over aging populations worldwide. Collagen-based biomaterials such as collagen hydrogels, decellularized ECM (dECM), and bioengineering techniques including collagen-based 3D bioprinting have facilitated the engineering of reproductive tissues. This review summarizes the recent progress in applying collagen-based biomaterials in reproductive. Furthermore, we discuss the prospects of collagen-based materials for engineering artificial reproductive tissues, hormone replacement therapy, and reproductive organ reconstruction, aiming to inspire new thoughts and advancements in engineered reproductive tissues research.
Graphical abstract
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Keshel SH, Rahimi A, Hancox Z, Ebrahimi M, Khojasteh A, Sefat F. The promise of regenerative medicine in the treatment of urogenital disorders. J Biomed Mater Res A 2020; 108:1747-1759. [PMID: 32270582 DOI: 10.1002/jbm.a.36942] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 03/16/2020] [Accepted: 03/17/2020] [Indexed: 12/20/2022]
Abstract
Polymers and scaffolds are the most significant tools in regenerative medicine. Urogenital disorders are an important group of diseases that greatly affect the patient's life expectancy and quality. Reconstruction of urogenital defects is one of the current challenges in regenerative medicine. Regenerative medicine, as well as tissue engineering, may offer suitable approaches, while the tools needed are appropriate materials and cells. Autologous urothelial cells obtained from biopsy, bone marrow-derived stem cells, adipose stem cells and urine-derived stem cells that expressed mesenchymal cell markers are the cells that mainly used. In addition, two main types of biomaterials mainly exist; synthetic polymers and composite scaffolds that are biodegradable polymers with controllable properties and naturally derived biomaterials such as extracellular matrix components and acellular tissue matrices. In this review, we present and evaluate the most appropriate and suitable scaffolds (naturally derived and synthetic polymers) and cells applied in urogenital reconstruction.
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Affiliation(s)
- Saeed Heidari Keshel
- Department of Tissue Engineering and Applied Cell Sciences, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Azam Rahimi
- Department of Tissue Engineering and Applied Cell Sciences, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Zoe Hancox
- Department of Biomedical and Electronics Engineering, School of Engineering, University of Bradford, Bradford, UK
| | - Maryam Ebrahimi
- Department of Biomedical and Electronics Engineering, School of Engineering, University of Bradford, Bradford, UK
| | - Arash Khojasteh
- Department of Tissue Engineering and Applied Cell Sciences, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Farshid Sefat
- Department of Biomedical and Electronics Engineering, School of Engineering, University of Bradford, Bradford, UK.,Interdisciplinary Research Centre in Polymer Science & Technology (Polymer IRC), University of Bradford, Bradford, UK
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Abbas TO, Yalcin HC, Pennisi CP. From Acellular Matrices to Smart Polymers: Degradable Scaffolds that are Transforming the Shape of Urethral Tissue Engineering. Int J Mol Sci 2019; 20:E1763. [PMID: 30974769 PMCID: PMC6479944 DOI: 10.3390/ijms20071763] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 03/29/2019] [Accepted: 04/02/2019] [Indexed: 12/24/2022] Open
Abstract
Several congenital and acquired conditions may result in severe narrowing of the urethra in men, which represent an ongoing surgical challenge and a significant burden on both health and quality of life. In the field of urethral reconstruction, tissue engineering has emerged as a promising alternative to overcome some of the limitations associated with autologous tissue grafts. In this direction, preclinical as well as clinical studies, have shown that degradable scaffolds are able to restore the normal urethral architecture, supporting neo-vascularization and stratification of the tissue. While a wide variety of degradable biomaterials are under scrutiny, such as decellularized matrices, natural, and synthetic polymers, the search for scaffold materials that could fulfill the clinical performance requirements continues. In this article, we discuss the design requirements of the scaffold that appear to be crucial to better resemble the structural, physical, and biological properties of the native urethra and are expected to support an adequate recovery of the urethral function. In this context, we review the biological performance of the degradable polymers currently applied for urethral reconstruction and outline the perspectives on novel functional polymers, which could find application in the design of customized urethral constructs.
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Affiliation(s)
- Tariq O Abbas
- Laboratory for Stem Cell Research, Department of Health Science and Technology, Aalborg University, 9220 Aalborg, Denmark.
- Pediatric Surgery Department, Hamad General Hospital, 3050 Doha, Qatar.
- College of Medicine, Qatar University, 2713 Doha, Qatar.
- Surgery Department, Weill Cornell Medicine⁻Qatar, 24144 Doha, Qatar.
| | | | - Cristian P Pennisi
- Laboratory for Stem Cell Research, Department of Health Science and Technology, Aalborg University, 9220 Aalborg, Denmark.
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Abbas TO, Mahdi E, Hasan A, AlAnsari A, Pennisi CP. Current Status of Tissue Engineering in the Management of Severe Hypospadias. Front Pediatr 2018; 5:283. [PMID: 29404308 PMCID: PMC5786532 DOI: 10.3389/fped.2017.00283] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Accepted: 12/13/2017] [Indexed: 01/29/2023] Open
Abstract
Hypospadias, characterized by misplacement of the urinary meatus in the lower side of the penis, is a frequent birth defect in male children. Because of the huge variation in the anatomic presentation of hypospadias, no single urethroplasty procedure is suitable for all situations. Hence, many surgical techniques have emerged to address the shortage of tissues required to bridge the gap in the urethra particularly in the severe forms of hypospadias. However, the rate of postoperative complications of currently available surgical procedures reaches up to one-fourth of the patients having severe hypospadias. Moreover, these urethroplasty techniques are technically demanding and require considerable surgical experience. These limitations have fueled the development of novel tissue engineering techniques that aim to simplify the surgical procedures and to reduce the rate of complications. Several types of biomaterials have been considered for urethral repair, including synthetic and natural polymers, which in some cases have been seeded with cells prior to implantation. These methods have been tested in preclinical and clinical studies, with variable degrees of success. This review describes the different urethral tissue engineering methodologies, with focus on the approaches used for the treatment of hypospadias. At present, despite many significant advances, the search for a suitable tissue engineering approach for use in routine clinical applications continues.
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Affiliation(s)
- Tariq O. Abbas
- Department of Health Science and Technology, Faculty of Medicine, Aalborg University, Aalborg, Denmark
- Department of Pediatric Surgery and Urology, Hamad General Hospital, Doha, Qatar
- College of Medicine, Qatar University, Doha, Qatar
| | - Elsadig Mahdi
- Department of Mechanical and Industrial Engineering, Qatar University, Doha, Qatar
| | - Anwarul Hasan
- Department of Mechanical and Industrial Engineering, Qatar University, Doha, Qatar
| | | | - Cristian Pablo Pennisi
- Department of Health Science and Technology, Faculty of Medicine, Aalborg University, Aalborg, Denmark
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Zupančič D, Mrak Poljšak K, Kreft ME. Co-culturing porcine normal urothelial cells, urinary bladder fibroblasts and smooth muscle cells for tissue engineering research. Cell Biol Int 2017; 42:411-424. [PMID: 29115705 DOI: 10.1002/cbin.10910] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Accepted: 11/05/2017] [Indexed: 12/27/2022]
Abstract
New strategies for culturing and co-culturing of the main types of urinary bladder cells are essential for successful establishment of biomimetic in vitro models, which could be applied for research into, and management of, diverse urological disorders. Porcine normal urothelial cells are available in nearly unlimited amounts and have many properties equivalent to human urothelial cells. In the present study, we established normal differentiated porcine urothelial cells in co-cultures with porcine urinary bladder normal fibroblasts and/or smooth muscle cells. The optimal culture medium for establishment of differentiated urothelial cells, demonstrated by positive immunofluorescence of uroplakins, cytokeratins (CK 7, CK 20), zonula occludens 1 (ZO-1), claudin 4, claudin 8, and E-cadherin, was the medium composed of equal parts of Advanced Dulbecco's modified Eagle's medium (A-DMEM) and MCDB 153 medium with physiological calcium concentration of 2.5 mM and without fetal bovine serum, named UroM (+Ca2+ - S). This medium was also proven to be suitable for culturing of bladder fibroblasts and smooth muscle cells and co-culturing of urothelial cells with these mesenchymal cells. Urothelial cell differentiation was optimal in UroM (+Ca2+ - S) medium in all co-culture conditions and when compared to all conditioned-media combinations. To summarize, these strategies for culturing and co-culturing of urinary bladder urothelial cells with mesenchymal cells could be used as new in vitro models for future basic and applicable research of the urinary bladder and thus potentially also for translational tissue engineering studies.
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Affiliation(s)
- Daša Zupančič
- Institute of Cell Biology, Faculty of Medicine, University of Ljubljana, Vrazov trg 2, 1000 Ljubljana, Slovenia
| | - Katjuša Mrak Poljšak
- Institute of Cell Biology, Faculty of Medicine, University of Ljubljana, Vrazov trg 2, 1000 Ljubljana, Slovenia
| | - Mateja Erdani Kreft
- Institute of Cell Biology, Faculty of Medicine, University of Ljubljana, Vrazov trg 2, 1000 Ljubljana, Slovenia
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Browne BM, Vanni AJ. Use of Alternative Techniques and Grafts in Urethroplasty. Urol Clin North Am 2017; 44:127-140. [DOI: 10.1016/j.ucl.2016.08.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Peng G, Liu H, Fan Y. Biomaterial Scaffolds for Reproductive Tissue Engineering. Ann Biomed Eng 2016; 45:1592-1607. [PMID: 28004214 DOI: 10.1007/s10439-016-1779-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Accepted: 12/16/2016] [Indexed: 01/23/2023]
Abstract
The reproductive system usually involves gamete producing gonads, a series of specialized ducts, accessory glands and the external genitalia. Despite there are many traditional methods such as hormonal and surgical approaches, at present no effective treatments exist to help patients suffering from serious diseases of reproductive system, including congenital and acquired abnormalities, malignant tumor, traumatic, infectious etiologies, inflammation and iatrogenic injuries. Tissue engineering holds promise for reproductive medicine through the development of biological alternative. Till now, a diverse range of biomaterials have been utilized as suitable substrates to match both the mechanical and biological context of reproductive tissues. The current review will focus mainly on the applications of biomaterial scaffolds and their major achievements in each region of reproductive systems.
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Affiliation(s)
- Ge Peng
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Xue Yuan Road No. 37, Haidian District, Beijing, 100191, People's Republic of China
| | - Haifeng Liu
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Xue Yuan Road No. 37, Haidian District, Beijing, 100191, People's Republic of China.
| | - Yubo Fan
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Xue Yuan Road No. 37, Haidian District, Beijing, 100191, People's Republic of China.
- National Research Center for Rehabilitation Technical Aids, Beijing, 100176, People's Republic of China.
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de Kemp V, de Graaf P, Fledderus JO, Ruud Bosch JLH, de Kort LMO. Tissue engineering for human urethral reconstruction: systematic review of recent literature. PLoS One 2015; 10:e0118653. [PMID: 25689740 PMCID: PMC4331084 DOI: 10.1371/journal.pone.0118653] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Accepted: 01/11/2015] [Indexed: 11/19/2022] Open
Abstract
Background Techniques to treat urethral stricture and hypospadias are restricted, as substitution of the unhealthy urethra with tissue from other origins (skin, bladder or buccal mucosa) has some limitations. Therefore, alternative sources of tissue for use in urethral reconstructions are considered, such as ex vivo engineered constructs. Purpose To review recent literature on tissue engineering for human urethral reconstruction. Methods A search was made in the PubMed and Embase databases restricted to the last 25 years and the English language. Results A total of 45 articles were selected describing the use of tissue engineering in urethral reconstruction. The results are discussed in four groups: autologous cell cultures, matrices/scaffolds, cell-seeded scaffolds, and clinical results of urethral reconstructions using these materials. Different progenitor cells were used, isolated from either urine or adipose tissue, but slightly better results were obtained with in vitro expansion of urothelial cells from bladder washings, tissue biopsies from the bladder (urothelium) or the oral cavity (buccal mucosa). Compared with a synthetic scaffold, a biological scaffold has the advantage of bioactive extracellular matrix proteins on its surface. When applied clinically, a non-seeded matrix only seems suited for use as an onlay graft. When a tubularized substitution is the aim, a cell-seeded construct seems more beneficial. Conclusions Considerable experience is available with tissue engineering of urethral tissue in vitro, produced with cells of different origin. Clinical and in vivo experiments show promising results.
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Affiliation(s)
- Vincent de Kemp
- Department of Urology, University Medical Centre Utrecht, Utrecht, The Netherlands
| | - Petra de Graaf
- Department of Urology, University Medical Centre Utrecht, Utrecht, The Netherlands
- * E-mail: (PdG); (LdK)
| | - Joost O. Fledderus
- Department of Nephrology and Hypertension, University Medical Center Utrecht, Utrecht, The Netherlands
| | - J. L. H. Ruud Bosch
- Department of Urology, University Medical Centre Utrecht, Utrecht, The Netherlands
| | - Laetitia M. O. de Kort
- Department of Urology, University Medical Centre Utrecht, Utrecht, The Netherlands
- * E-mail: (PdG); (LdK)
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Jang YJ, Chun SY, Kim GN, Kim JR, Oh SH, Lee JH, Kim BS, Song PH, Yoo ES, Kwon TG. Characterization of a novel composite scaffold consisting of acellular bladder submucosa matrix, polycaprolactone and Pluronic F127 as a substance for bladder reconstruction. Acta Biomater 2014; 10:3117-25. [PMID: 24632539 DOI: 10.1016/j.actbio.2014.03.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2013] [Revised: 02/28/2014] [Accepted: 03/04/2014] [Indexed: 01/30/2023]
Abstract
The bladder is an organ susceptible to a variety of congenital anomalies, injuries and disorders. To address the clinical limitations of existing scaffolds, we fabricated a novel scaffold that can be applied to morphological and functional bladder reconstruction. As a first step to prove the benefit of the scaffold, intensive in vitro and in vivo analyses were conducted. The novel composite scaffold was fabricated using polycaprolactone/Pluronic F127 (PCL/F127) and variable proportions (1, 3, 5 and 10wt.%) of porcine acellular bladder submucosa matrix (BSM). Physicochemical properties and biocompatibilities of the scaffolds were characterized. For cell-mediated analysis, upper-urinary-tract-derived urine stem cells were used. Observations of tensile strength, modulus, porosity, cell adhesion, viability and proliferation characteristics of scaffolds indicated that the optimum proportion of BSM in the composite scaffolds was 3 or 5 wt.%. Based on comparison of 3 and 5 wt.% BSM/PCL/F127 scaffolds with respect to degradability, hydrophilicity, surface properties and functional group presence, the 3 wt.% BSM was chosen for in vivo studies. 8 weeks after kidney-subcapsular implantation of the 3 wt.% BSM/PCL/F127 scaffold, cells remained attached to the surface and there was no evidence of teratomas. A BSM content of 3 wt.% was the optimum proportion for fabrication of the neo scaffold. We predict that the 3 wt.% BSM/PCL/F127 composite scaffold could act as an ideal matrix after cystectomy based on its favorable physicochemical properties and biocompatibilities.
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Sayeg K, Freitas-Filho LG, Waitzberg ÂFL, Arias VEA, Laks M, Egydio FM, Oliveira AS. Integration of collagen matrices into the urethra when implanted as onlay graft. Int Braz J Urol 2014; 39:414-23. [PMID: 23849574 DOI: 10.1590/s1677-5538.ibju.2013.03.16] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Accepted: 04/29/2013] [Indexed: 01/10/2023] Open
Abstract
OBJECTIVE To assess the integration of decellularized heterologous collagen matrices into the urethra, when implanted with no cells or when seeded with autologous smooth muscle cells. MATERIALS AND METHODS Eighteen New Zealand rabbits were randomly assigned to two groups: Group I (n = 9) - animals undergoing urethral segment resection with interposition of a patch of heterologous collagen matrix seeded with autologous smooth muscle cells; Group II (n = 9) - animals undergoing resection of a urethral segment with interposition of a decellularized heterologous collagen matrix patch. Two animals from each group were sacrificed on postoperative days seven, fourteen and twenty-eight; three animals from each group were sacrificed at the end of three postoperative months. At the end of the third month one animal from each group underwent urethroscopy for urethral integrity assessment and one animal from each group had its microcirculation image captured by a SDF device (Side-stream Dark Field - Microscan Analysis Software). One animal from each group in each euthanasia period underwent cystourethrography so as the urethra could be viewed at flow time. The matrices integration was assessed through histological examination using hematoxylin and eosin (H & E), Masson trichrome (MT), Picrosirius red and Von Willebrand staining. In a blind study with two pathologists all the slides were studied. RESULTS The matrices whether seeded or not with autologous muscle cells were able to restore the architecture of the urethra, but were eliminated from the first week on, before incorporation. Microcirculation of the neourethra, at the end of the third month, showed the same characteristics as a normal urethra in both groups of animals. CONCLUSION Natural heterologous matrices implanted in the urethra as onlay graft were not incorporated into its walls but were able to fully restore the cell architecture of the organ, regardless of being seeded or not with autologous muscle cells.
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Affiliation(s)
- Kleber Sayeg
- Department of Surgery, Federal University of Sao Paulo, Brazil
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Janssen DAW, Geutjes PJ, Odenthal J, van Kuppevelt TH, Schalken JA, Feitz WFJ, Heesakkers JFPA. A new, straightforward ex vivo organoid bladder mucosal model for preclinical research. J Urol 2013; 190:341-9. [PMID: 23306090 DOI: 10.1016/j.juro.2012.12.103] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/27/2012] [Indexed: 10/27/2022]
Abstract
PURPOSE We developed an experimental ex vivo organoid bladder mucosal model that can be used for experimental research purposes to create alternatives to current animal models. MATERIALS AND METHODS We developed an ex vivo organoid bladder mucosal model by immobilizing a type I collagen scaffold on the bottom of a Transwell® insert, creating a 2-compartment system. Mucosal biopsies from porcine bladders were placed on top of the scaffold and cultured in different mediums. We evaluated the morphological aspects of biopsy tissue. Cultured samples were assessed by scanning electron microscopy, and immunohistochemical and histochemical staining for cell identification, proliferation and morphology. RESULTS Cells remained viable in Dulbecco's modified Eagle's medium/F-12 and smooth muscle cell medium for up to 3 weeks. The mucosa retained normal morphological characteristics for up to 1 week. Cells (mostly urothelial cells) proliferated and fully covered the scaffold surface within 3 weeks. CONCLUSIONS We developed an experimental ex vivo organoid model of bladder mucosa for preclinical experimental research. This model could be used for high volume screening for pharmacology and toxicology experiments. It has the potential to replace currently used animal models.
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Affiliation(s)
- Dick A W Janssen
- Department of Urology 659, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
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García-García JM, Quijada-Garrido I, López L, París R, Núñez-López MT, de la Peña Zarzuelo E, Garrido L. The surface modification of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) copolymers to improve the attachment of urothelial cells. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:362-9. [DOI: 10.1016/j.msec.2012.08.052] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2012] [Revised: 08/03/2012] [Accepted: 08/29/2012] [Indexed: 12/20/2022]
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García-García JM, López L, París R, Núñez-López MT, Quijada-Garrido I, de la Peña Zarzuelo E, Garrido L. Surface modification of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) copolymer films for promoting interaction with bladder urothelial cells. J Biomed Mater Res A 2011; 100:7-17. [PMID: 21972181 DOI: 10.1002/jbm.a.33215] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2011] [Revised: 04/19/2011] [Accepted: 06/21/2011] [Indexed: 01/16/2023]
Abstract
Often bladder dysfunction and diseases lead to therapeutic interventions that require partial or complete replacement of damaged tissue. For this reason, the development of biomaterials to repair the bladder by promoting the adhesion and growth of urothelial cells is of interest. With this aim, a modified copolyester of biocompatible and biodegradable poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(HB-co-HV)] was used as scaffold for porcine urothelial cell culture. In addition to good biocompatibility, the surface of P(HB-co-HV) substrates was modified to provide both, higher hydrophilicity and a better interaction with urothelial cells. Chemical treatments with ethylenediamine (ED) and sodium hydroxide (NaOH) led to substrate surfaces with decreasing hydrophobicity and provided functional groups that enable the grafting of bioactive molecules, such as a laminin derived YIGSR sequence. Physico-chemical properties of modified substrates were studied and compared with those of the pristine P(HB-co-HV). Urothelial cell morphology on treated substrates was studied. The results showed that focal attachment and cell-related properties were improved for peptide grafted polymer compared with both, the unmodified and functionalized copolyester.
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Affiliation(s)
- José M García-García
- Departamento de Química-Física de Polímeros, Instituto de Ciencia y Tecnología de Polímeros, Consejo Superior de Investigaciones Científicas-ICTP-CSIC, Juan de la Cierva 3, E-28006 Madrid, Spain
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Abstract
Many medical conditions require surgical reconstruction of hollow organs. Tissue engineering of organs and tissues is a promising new technique without harvest site morbidity. An ideal biomaterial should be biocompatible, support tissue formation and provide adequate structural support. It should degrade gradually and provide an environment allowing for cell-cell interaction, adhesion, proliferation, migration, and differentiation. Although tissue formation is feasible, functionality has never been demonstrated. Mainly the lack of proper innervation and vascularisation are hindering contractility and normal function. In this chapter we critically review the current state of engineering hollow organs with a special focus on innervation and vascularisation.
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Li B, Liu X, Cao C, Dong Y, Wang Z, Ding C. Biological and antibacterial properties of plasma sprayed wollastonite coatings grafting gentamicin loaded collagen. J Biomed Mater Res A 2008; 87:84-90. [DOI: 10.1002/jbm.a.31776] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Bolenz C, Ikinger EM, Ströbel P, Trojan L, Steidler A, Fernández MI, Honeck P, Gabriel U, Weiss C, Grobholz R, Alken P, Michel MS. Topical chemotherapy in human urothelial carcinoma explants: a novel translational tool for preclinical evaluation of experimental intravesical therapies. Eur Urol 2008; 56:504-11. [PMID: 18691807 DOI: 10.1016/j.eururo.2008.07.042] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2008] [Accepted: 07/18/2008] [Indexed: 12/17/2022]
Abstract
BACKGROUND Urothelial carcinoma (UC) is associated with a high local recurrence rate despite intravesical therapy. There is a lack of representative preclinical models for standardized testing of novel experimental therapies. OBJECTIVE To develop an ex vivo model for human UC and to evaluate its ability to generate reproducible and reliable results when testing cytotoxic agents. DESIGN, SETTING, AND PARTICIPANTS Normal human urothelium (NHU) and bladder UC explants were collected from patients treated at our institution. A total of 195 surgical explants were cultured on a gelatine matrix. Tissue viability was regularly assessed using nicotinamide adenine dinucleotide (NADH) diaphorase enzymehistochemistry. Topical paclitaxel (PTX) or mitomycin C (MMC) chemotherapy was performed in a subset of 45 UC specimens. INTERVENTION All patients underwent radical cystectomy (RC) or primary transurethral resection (TUR) of a bladder UC. MEASUREMENTS Triple immunofluorescence (pan-cytokeratin [pan-CK]; 4',6-diamidin-2'-phenylindol-dihydrochloride [DAPI]; terminal deoxynucleotidyl transferase biotin-dUTP nick-end labelling [TUNEL]) and caspase-3 staining of paraffin sections was performed. Proliferation rates were assessed using Ki-67 labelling indices. Apoptosis (percent) was quantified in representative tissue areas to characterize culture stability and to assess antineoplastic effects. RESULTS AND LIMITATIONS No signs of necrosis and no significant changes in apoptosis were observed during the first 12 d of culture. Of all explants, 88.5% were vital after 20 d. In a highly reproducible fashion, topical chemotherapy resulted in significantly increased apoptosis (37.4% [19.0-75.0%] for PTX and 36.2% [18.8-46.7%] for MMC) compared with controls (7.5% [3.0-26.8%]; p<0.001]). No statistically significant difference was observed regarding the effects of the two chemotherapeutic agents (p=0.119). CONCLUSIONS The presented human ex vivo model takes UC heterogeneity into account and serves as a valuable translational tool. It offers an attractive alternative to preclinical cell line experiments or animal models and may even be used for prospective toxicity and drug efficacy tests in individual patients.
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Affiliation(s)
- Christian Bolenz
- Department of Urology, Mannheim Medical Centre, University of Heidelberg, Germany.
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Hudson AE, Carmean N, Bassuk JA. Extracellular matrix protein coatings for facilitation of urothelial cell attachment. ACTA ACUST UNITED AC 2007; 13:2219-25. [PMID: 17638517 DOI: 10.1089/ten.2006.0337] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Synthetic urothelium is an important goal for the tissue-engineering field that would have great utility for treating diseases and congenital defects affecting the urinary tract. A key step in the development of synthetic tissue is optimizing the conditions for coating biomaterials with cells of interest. Initial cell attachment is an important consideration when designing tissue-engineering scaffolds. The scaffold environment must also be conducive to cell proliferation and differentiation. The most popular materials for tissue-engineering scaffold often have suboptimal properties when analyzed for cell attachment and growth. It would then be of interest to know, for urinary tract tissue-engineering applications, which extracellular matrix protein coatings can facilitate urothelial cell attachment and encourage growth. Cells grown on 96-well cycloolefin plates coated with type IV or type I collagen exhibited improved initial attachment over plates coated with fibronectin or laminin. After 20 h, deoxyribonucleic acid synthesis was found to increase in cultures grown on type IV collagen, fibronectin, and laminin. Total metabolic activity of urothelial cell cultures was also monitored, and no difference was seen between any protein-coating conditions. The development of such reliable assays will be beneficial in monitoring the fate of scaffolds seeded with human urothelial cells.
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Affiliation(s)
- Amber E Hudson
- Program in Human Urothelial Biology, Seattle Children's Hospital Research Institute, Seattle, Washington, USA
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Li B, Liu X, Cao C, Ding C. Biocompatibility and antibacterial activity of plasma sprayed titania coating grafting collagen and gentamicin. J Biomed Mater Res A 2007; 83:923-930. [PMID: 17567859 DOI: 10.1002/jbm.a.31414] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
In this article, the plasma sprayed titania coatings were treated by grafting pure and gentamicin loaded collagen to improve the biocompatibility and antibacterial activity. The biocompatibility of the titania coating grafting collagen was evaluated by in vitro cell culturing test. The release rate of gentamicin from collagen was measured in tris-HCl buffer using UV spectrophotometer, and the antibacterial activity of the titania coating with gentamicin against Staphylococcus aureus was examined using the zone of inhibition test. The results showed that collagen was successfully grafted on the surface of titania coatings treated by sulfuric acid. The in vitro cell culturing test revealed that collagen significantly improved the cell adhesion and proliferation on the surface of titania coatings. The gentamicin loaded in collagen matrix could retain a sustained release in tris-HCl for 30 days, which was efficient to protect against the postoperative infection caused by S. aureus. The results indicated that the plasma sprayed titania coating grafting collagen and gentamicin would have the antibacterial activity together with the biocompatibility, which might be beneficial for the long term stability and surgical success rate of implants.
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Affiliation(s)
- Baoe Li
- Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China
| | - Xuanyong Liu
- Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China
| | - Cong Cao
- Department of Orthopaedics, Renji Hospital, College of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - Chuanxian Ding
- Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China
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Detomaso L, Gristina R, Senesi GS, d'Agostino R, Favia P. Stable plasma-deposited acrylic acid surfaces for cell culture applications. Biomaterials 2005; 26:3831-41. [PMID: 15626431 DOI: 10.1016/j.biomaterials.2004.10.011] [Citation(s) in RCA: 164] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2004] [Accepted: 10/18/2004] [Indexed: 11/21/2022]
Abstract
Continuous and modulated glow discharges were used to deposit thin films from acrylic acid vapors. Different deposition regimes were investigated, and their effect on chemical composition, morphology and homogeneity of the coatings, as well as on their stability in water and resistance to sterilization. Stable films were utilized in cell adhesion experiments with human fibroblasts.
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Affiliation(s)
- Loredana Detomaso
- Department of Chemistry, University of Bari, Via Orabona 4, Bari 70126, Italy
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André M, Latado H, Felley-Bosco E. Inducible nitric oxide synthase-dependent stimulation of PKGI and phosphorylation of VASP in human embryonic kidney cells. Biochem Pharmacol 2004; 69:595-602. [PMID: 15670578 DOI: 10.1016/j.bcp.2004.11.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2004] [Accepted: 11/09/2004] [Indexed: 10/26/2022]
Abstract
Inducible nitric oxide synthase (iNOS) production of nitric oxide (NO) has been mostly associated with so-called nitrosative stress or interaction with superoxide anion. However, recent investigations have indicated that, as for the other isoenzymes producing NO, guanylyl cyclase (GC) is a very sensitive target of iNOS activity. To further investigate this less explored signaling, the NO-cyclic guanosine 3'-5'-monophosphate (NO-cGMP)-induced vasodilator-stimulated phosphoprotein (VASP) phosphorylation on serine 239 was investigated in human embryonic kidney 293 cells (HEK cells). First, the expression and activity of alpha2 and beta1 NO-sensitive GC subunits was determined by Western blot analysis, reverse transcription-polymerase chain reaction and NO donors administration. Then, the expression of a functional cGMP-dependent protein kinase I (PKGI) was verified by addition of 8-Br-cGMP followed by determination of phosphorylation of VASP on serine 239. Finally, iNOS activation of this signaling pathway was characterized after transfection of HEK cells with human iNOS cDNA. Altogether our data show that iNOS-derived NO activates endogenous NO-sensitive GC and leads to VASP phosphorylation in HEK cells.
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Affiliation(s)
- Muriel André
- Pharmacology and Toxicology Department, Rue du Bugnon 27, 1005 Lausanne, Switzerland
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