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Angolkar M, Paramshetti S, Gahtani RM, Al Shahrani M, Hani U, Talath S, Osmani RAM, Spandana A, Gangadharappa HV, Gundawar R. Pioneering a paradigm shift in tissue engineering and regeneration with polysaccharides and proteins-based scaffolds: A comprehensive review. Int J Biol Macromol 2024; 265:130643. [PMID: 38467225 DOI: 10.1016/j.ijbiomac.2024.130643] [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: 10/13/2023] [Revised: 02/16/2024] [Accepted: 03/03/2024] [Indexed: 03/13/2024]
Abstract
In the realm of modern medicine, tissue engineering and regeneration stands as a beacon of hope, offering the promise of restoring form and function to damaged or diseased organs and tissues. Central to this revolutionary field are biological macromolecules-nature's own blueprints for regeneration. The growing interest in bio-derived macromolecules and their composites is driven by their environmentally friendly qualities, renewable nature, minimal carbon footprint, and widespread availability in our ecosystem. Capitalizing on these unique attributes, specific composites can be tailored and enhanced for potential utilization in the realm of tissue engineering (TE). This review predominantly concentrates on the present research trends involving TE scaffolds constructed from polysaccharides, proteins and glycosaminoglycans. It provides an overview of the prerequisites, production methods, and TE applications associated with a range of biological macromolecules. Furthermore, it tackles the challenges and opportunities arising from the adoption of these biomaterials in the field of TE. This review also presents a novel perspective on the development of functional biomaterials with broad applicability across various biomedical applications.
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Affiliation(s)
- Mohit Angolkar
- Department of Pharmaceutics, JSS College of Pharmacy, JSS Academy of Higher Education and Research (JSSAHER), Mysuru 570015, Karnataka, India
| | - Sharanya Paramshetti
- Department of Pharmaceutics, JSS College of Pharmacy, JSS Academy of Higher Education and Research (JSSAHER), Mysuru 570015, Karnataka, India
| | - Reem M Gahtani
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Khalid University, Abha 61421, Saudi Arabia.
| | - Mesfer Al Shahrani
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Khalid University, Abha 61421, Saudi Arabia.
| | - Umme Hani
- Department of Pharmaceutics, College of Pharmacy, King Khalid University, Abha 61421, Saudi Arabia.
| | - Sirajunisa Talath
- Department of Pharmaceutical Chemistry, RAK College of Pharmaceutical Sciences, RAK Medical and Health Sciences University, Ras Al Khaimah 11172, United Arab Emirates.
| | - Riyaz Ali M Osmani
- Department of Pharmaceutics, JSS College of Pharmacy, JSS Academy of Higher Education and Research (JSSAHER), Mysuru 570015, Karnataka, India.
| | - Asha Spandana
- Department of Pharmaceutics, JSS College of Pharmacy, JSS Academy of Higher Education and Research (JSSAHER), Mysuru 570015, Karnataka, India.
| | | | - Ravi Gundawar
- Department of Pharmaceutical Quality Assurance, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education (MAHE), Manipal 576104, Karnataka, India.
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Nishijima T, Okuyama K, Shibata S, Kimura H, Shinozaki M, Ouchi T, Mabuchi Y, Ohno T, Nakayama J, Hayatsu M, Uchiyama K, Shindo T, Niiyama E, Toita S, Kawada J, Iwamoto T, Nakamura M, Okano H, Nagoshi N. Novel artificial nerve transplantation of human iPSC-derived neurite bundles enhanced nerve regeneration after peripheral nerve injury. Inflamm Regen 2024; 44:6. [PMID: 38347645 PMCID: PMC10863150 DOI: 10.1186/s41232-024-00319-4] [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: 10/30/2023] [Accepted: 01/05/2024] [Indexed: 02/15/2024] Open
Abstract
BACKGROUND Severe peripheral nerve damage always requires surgical treatment. Autologous nerve transplantation is a standard treatment, but it is not sufficient due to length limitations and extended surgical time. Even with the available artificial nerves, there is still large room for improvement in their therapeutic effects. Novel treatments for peripheral nerve injury are greatly expected. METHODS Using a specialized microfluidic device, we generated artificial neurite bundles from human iPSC-derived motor and sensory nerve organoids. We developed a new technology to isolate cell-free neurite bundles from spheroids. Transplantation therapy was carried out for large nerve defects in rat sciatic nerve with novel artificial nerve conduit filled with lineally assembled sets of human neurite bundles. Quantitative comparisons were performed over time to search for the artificial nerve with the therapeutic effect, evaluating the recovery of motor and sensory functions and histological regeneration. In addition, a multidimensional unbiased gene expression profiling was carried out by using next-generation sequencing. RESULT After transplantation, the neurite bundle-derived artificial nerves exerted significant therapeutic effects, both functionally and histologically. Remarkably, therapeutic efficacy was achieved without immunosuppression, even in xenotransplantation. Transplanted neurite bundles fully dissolved after several weeks, with no tumor formation or cell proliferation, confirming their biosafety. Posttransplant gene expression analysis highlighted the immune system's role in recovery. CONCLUSION The combination of newly developed microfluidic devices and iPSC technology enables the preparation of artificial nerves from organoid-derived neurite bundles in advance for future treatment of peripheral nerve injury patients. A promising, safe, and effective peripheral nerve treatment is now ready for clinical application.
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Affiliation(s)
- Takayuki Nishijima
- Department of Orthopaedic Surgery, Keio University School of Medicine, 35 Shinanomachi Shinjuku-Ku, Tokyo, 160-8582, Japan
- Department of Physiology, Keio University School of Medicine, 35 Shinanomachi Shinjuku-Ku, Tokyo, 160-8582, Japan
| | - Kentaro Okuyama
- Department of Physiology, Keio University School of Medicine, 35 Shinanomachi Shinjuku-Ku, Tokyo, 160-8582, Japan
- Division of Microscopic Anatomy, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-Dori, Chuo-Ku, Niigata, 951-8510, Japan
| | - Shinsuke Shibata
- Department of Physiology, Keio University School of Medicine, 35 Shinanomachi Shinjuku-Ku, Tokyo, 160-8582, Japan.
- Division of Microscopic Anatomy, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-Dori, Chuo-Ku, Niigata, 951-8510, Japan.
- Electron Microscope Laboratory, Keio University School of Medicine, 35 Shinanomachi Shinjuku-Ku, Tokyo, 160-8582, Japan.
| | - Hiroo Kimura
- Department of Orthopaedic Surgery, Keio University School of Medicine, 35 Shinanomachi Shinjuku-Ku, Tokyo, 160-8582, Japan
- Department of Orthopaedic Surgery, Kitasato Institute Hospital, 9-1, Shirokane 5-Chome, Minato-Ku, Tokyo, 108-8642, Japan
| | - Munehisa Shinozaki
- Department of Physiology, Keio University School of Medicine, 35 Shinanomachi Shinjuku-Ku, Tokyo, 160-8582, Japan
| | - Takehito Ouchi
- Department of Physiology, Tokyo Dental College, 2-9-18, Kanda-Misaki-Cho, Chiyoda-Ku, Tokyo, 101-0061, Japan
| | - Yo Mabuchi
- Department of Clinical Regenerative Medicine, Fujita Medical Innovation Center, Fujita Health University, Floor 4, Haneda Innovation City Zone A, 1-1-4, Hanedakuko, Ota-Ku, Tokyo, 144-0041, Japan
| | - Tatsukuni Ohno
- Oral Health Science Center, Tokyo Dental College, 2-9-18 Kanda-Misaki-Cho, Chiyoda-Ku, Tokyo, 101-0061, Japan
| | - Junpei Nakayama
- Division of Microscopic Anatomy, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-Dori, Chuo-Ku, Niigata, 951-8510, Japan
| | - Manabu Hayatsu
- Division of Microscopic Anatomy, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-Dori, Chuo-Ku, Niigata, 951-8510, Japan
| | - Keiko Uchiyama
- Division of Microscopic Anatomy, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-Dori, Chuo-Ku, Niigata, 951-8510, Japan
| | - Tomoko Shindo
- Department of Physiology, Keio University School of Medicine, 35 Shinanomachi Shinjuku-Ku, Tokyo, 160-8582, Japan
- Electron Microscope Laboratory, Keio University School of Medicine, 35 Shinanomachi Shinjuku-Ku, Tokyo, 160-8582, Japan
| | - Eri Niiyama
- Division of Microscopic Anatomy, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-Dori, Chuo-Ku, Niigata, 951-8510, Japan
- Jiksak Bioengineering, Inc, Cybernics Medical Innovation Base-A Room 322, 3-25-16 Tonomachi, Kawasaki-Ku, Kawasaki-Shi, Kanagawa, 210-0821, Japan
| | - Sayaka Toita
- Division of Microscopic Anatomy, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-Dori, Chuo-Ku, Niigata, 951-8510, Japan
- Jiksak Bioengineering, Inc, Cybernics Medical Innovation Base-A Room 322, 3-25-16 Tonomachi, Kawasaki-Ku, Kawasaki-Shi, Kanagawa, 210-0821, Japan
- Present address: Faculty of Materials for Energy, Graduate School of Natural Science and Technology, Shimane University, Matsue, Shimane, Japan
| | - Jiro Kawada
- Department of Physiology, Keio University School of Medicine, 35 Shinanomachi Shinjuku-Ku, Tokyo, 160-8582, Japan
- Division of Microscopic Anatomy, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-Dori, Chuo-Ku, Niigata, 951-8510, Japan
- Jiksak Bioengineering, Inc, Cybernics Medical Innovation Base-A Room 322, 3-25-16 Tonomachi, Kawasaki-Ku, Kawasaki-Shi, Kanagawa, 210-0821, Japan
| | - Takuji Iwamoto
- Department of Orthopaedic Surgery, Keio University School of Medicine, 35 Shinanomachi Shinjuku-Ku, Tokyo, 160-8582, Japan
| | - Masaya Nakamura
- Department of Orthopaedic Surgery, Keio University School of Medicine, 35 Shinanomachi Shinjuku-Ku, Tokyo, 160-8582, Japan
| | - Hideyuki Okano
- Department of Physiology, Keio University School of Medicine, 35 Shinanomachi Shinjuku-Ku, Tokyo, 160-8582, Japan
| | - Narihito Nagoshi
- Department of Orthopaedic Surgery, Keio University School of Medicine, 35 Shinanomachi Shinjuku-Ku, Tokyo, 160-8582, Japan.
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Ardhani R, Ana ID, Tabata Y. Gelatin hydrogel membrane containing carbonate hydroxyapatite for nerve regeneration scaffold. J Biomed Mater Res A 2020; 108:2491-2503. [PMID: 32418269 DOI: 10.1002/jbm.a.37000] [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: 01/08/2020] [Revised: 04/11/2020] [Accepted: 04/19/2020] [Indexed: 12/26/2022]
Abstract
A scaffold that mimics physicochemical structure of nerve and supplies calcium ions in axonal environment is an attractive alternative for nerve regeneration, especially when applied in critical nerve defect. Various scaffold material, design, including their combination with several growth-induced substances and cells application have been being investigated and used in the area of nerve tissue engineering. However, the development remains challenges today because they are still far from ideal concerning their stability, reproducibility, including complicated handling related to the poor mechanical strength. In view of the current basis, in this study, the introduction of carbonated hydroxyapatite (CHA) as promising candidate to increase mechanical properties of nerve scaffold is reported. The incorporation of CHA was not only expected to provide better mechanical properties of the scaffold. Under physiological condition, CHA is known to be the most stable phases of calcium phosphate compound. Therefore, CHA was expected to provide controlled release calcium for better axonal environment and promote fasten nerve regeneration. This study shows that CHA incorporated gelatin membrane has ideal microstructure to prevent fibrous tissue ingrowth into the injury site, while retaining its capability to survive nerve tissue by allowing adequate glucose and specific proteins diffusion. The provided Ca2+ release to the environment promoted neuronal growth, without suppressing acetylcholine esterase release activity. Neurite elongation was dramatically higher in the gelatin membrane incorporated with CHA. Introduction of CHA into gelatin membrane represents a new generation medical device for nerve reconstruction, with CHA was considered as a promising factor.
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Affiliation(s)
- Retno Ardhani
- Department of Dental Biomedical Sciences, Faculty of Dentistry, Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - Ika Dewi Ana
- Department of Dental Biomedical Sciences, Faculty of Dentistry, Universitas Gadjah Mada, Yogyakarta, Indonesia
| | - Yasuhiko Tabata
- Laboratory of Biomaterials, Department of Regeneration Science and Engineering Institute for Frontier Life and Medical Sciences, Kyoto University, Kyoto, Japan
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Gong H, Fei H, Xu Q, Gou M, Chen HH. 3D‐engineered GelMA conduit filled with ECM promotes regeneration of peripheral nerve. J Biomed Mater Res A 2019; 108:805-813. [PMID: 31808270 DOI: 10.1002/jbm.a.36859] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2019] [Revised: 11/21/2019] [Accepted: 11/22/2019] [Indexed: 02/05/2023]
Affiliation(s)
| | | | | | - Maling Gou
- Department of Biotherapy Cancer Center, West China Hospital, Sichuan University Chengdu China
| | - Harry H. Chen
- StemEasy Biotech Jiangyin China
- Department of Biotherapy Cancer Center, West China Hospital, Sichuan University Chengdu China
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Okuda A, Horii-Hayashi N, Sasagawa T, Shimizu T, Shigematsu H, Iwata E, Morimoto Y, Masuda K, Koizumi M, Akahane M, Nishi M, Tanaka Y. Bone marrow stromal cell sheets may promote axonal regeneration and functional recovery with suppression of glial scar formation after spinal cord transection injury in rats. J Neurosurg Spine 2017; 26:388-395. [DOI: 10.3171/2016.8.spine16250] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
OBJECTIVE
Transplantation of bone marrow stromal cells (BMSCs) is a theoretical potential as a therapeutic strategy in the treatment of spinal cord injury (SCI). Although a scaffold is sometimes used for retaining transplanted cells in damaged tissue, it is also known to induce redundant immunoreactions during the degradation processes. In this study, the authors prepared cell sheets made of BMSCs, which are transplantable without a scaffold, and investigated their effects on axonal regeneration, glial scar formation, and functional recovery in a completely transected SCI model in rats.
METHODS
BMSC sheets were prepared from the bone marrow of female Fischer 344 rats using ascorbic acid and were cryopreserved until the day of transplantation. A gelatin sponge (GS), as a control, or BMSC sheet was transplanted into a 2-mm-sized defect of the spinal cord at the T-8 level. Axonal regeneration and glial scar formation were assessed 2 and 8 weeks after transplantation by immunohistochemical analyses using anti-Tuj1 and glial fibrillary acidic protein (GFAP) antibodies, respectively. Locomotor function was evaluated using the Basso, Beattie, and Bresnahan scale.
RESULTS
The BMSC sheets promoted axonal regeneration at 2 weeks after transplantation, but there was no significant difference in the number of Tuj1-positive axons between the sheet- and GS-transplanted groups. At 8 weeks after transplantation, Tuj1-positive axons elongated across the sheet, and their numbers were significantly greater in the sheet group than in the GS group. The areas of GFAP-positive glial scars in the sheet group were significantly reduced compared with those of the GS group at both time points. Finally, hindlimb locomotor function was ameliorated in the sheet group at 4 and 8 weeks after transplantation.
CONCLUSIONS
The results of the present study indicate that an ascorbic acid–induced BMSC sheet is effective in the treatment of SCI and enables autologous transplantation without requiring a scaffold.
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Affiliation(s)
- Akinori Okuda
- 1Department of Orthopaedic Surgery, Nara Medical University, Kashihara
- 2Department of Anatomy and Cell Biology, Faculty of Medicine, Nara Medical University, Kashihara
| | - Noriko Horii-Hayashi
- 2Department of Anatomy and Cell Biology, Faculty of Medicine, Nara Medical University, Kashihara
| | - Takayo Sasagawa
- 2Department of Anatomy and Cell Biology, Faculty of Medicine, Nara Medical University, Kashihara
| | - Takamasa Shimizu
- 1Department of Orthopaedic Surgery, Nara Medical University, Kashihara
| | - Hideki Shigematsu
- 1Department of Orthopaedic Surgery, Nara Medical University, Kashihara
| | - Eiichiro Iwata
- 1Department of Orthopaedic Surgery, Nara Medical University, Kashihara
| | - Yasuhiko Morimoto
- 1Department of Orthopaedic Surgery, Nara Medical University, Kashihara
| | - Keisuke Masuda
- 1Department of Orthopaedic Surgery, Nara Medical University, Kashihara
| | - Munehisa Koizumi
- 3Spine and Spinal Cord Surgery Center, Nara Prefecture General Medical Center; and
| | - Manabu Akahane
- 4Department of Public Health, Health Management, and Policy, Nara Medical University, Kashihara, Nara, Japan
| | - Mayumi Nishi
- 2Department of Anatomy and Cell Biology, Faculty of Medicine, Nara Medical University, Kashihara
| | - Yasuhito Tanaka
- 1Department of Orthopaedic Surgery, Nara Medical University, Kashihara
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Luo L, Gan L, Liu Y, Tian W, Tong Z, Wang X, Huselstein C, Chen Y. Construction of nerve guide conduits from cellulose/soy protein composite membranes combined with Schwann cells and pyrroloquinoline quinone for the repair of peripheral nerve defect. Biochem Biophys Res Commun 2015; 457:507-13. [DOI: 10.1016/j.bbrc.2014.12.121] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2014] [Accepted: 12/31/2014] [Indexed: 01/19/2023]
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Hazer DB, Bal E, Nurlu G, Benli K, Balci S, Öztürk F, Hazer B. In vivo application of poly-3-hydroxyoctanoate as peripheral nerve graft. J Zhejiang Univ Sci B 2014; 14:993-1003. [PMID: 24190445 DOI: 10.1631/jzus.b1300016] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE This study aims to investigate the degree of biocompatibility and neuroregeneration of a polymer tube, poly-3-hydroxyoctanoate (PHO) in nerve gap repair. METHODS Forty Wistar Albino male rats were randomized into two groups: autologous nerve gap repair group and PHO tube repair group. In each group, a 10-mm right sciatic nerve defect was created and reconstructed accordingly. Neuroregeneration was studied by sciatic function index (SFI), electromyography, and immunohistochemical studies on Days 7, 21, 45 and 60 of implantation. Biocompatibility was analyzed by the capsule formation around the conduit. Biodegradation was analyzed by the molecular weight loss in vivo. RESULTS Electrophysiological and histomorphometric assessments demonstrated neuroregeneration in both groups over time. In the experimental group, a straight alignment of the Schwann cells parallel to the axons was detected. However, autologous nerve graft seems to have a superior neuroregeneration compared to PHO grafts. Minor biodegradation was observed in PHO conduit at the end of 60 d. CONCLUSIONS Although neuroregeneration is detected in PHO grafts with minor degradation in 60 d, autologous nerve graft is found to be superior in axonal regeneration compared to PHO nerve tube grafts. PHO conduits were found to create minor inflammatory reaction in vivo, resulting in good soft tissue response.
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Affiliation(s)
- D Burcu Hazer
- Department of Neurosurgery, Faculty of Medicine, Muğla Sıtkı Koçman University, Muğla 48000, Turkey; Atatürk Research and Medical Center, Neurosurgery Clinic, Ministry of Health of the Republic of Turkey, Ankara 06110, Turkey; Department of Neurology, Faculty of Medicine, School of Medicine, Hacettepe University, Ankara 06100, Turkey; Department of Neurosurgery, Faculty of Medicine, School of Medicine, Hacettepe University, Ankara 06100, Turkey; Atatürk Research and Medical Center, Department of Pathology, Yıldırım Beyazıt University, Ankara 06110, Turkey; Department of Histology and Embryology, Faculty of Medicine, Muğla Sıtkı Koçman University, Muğla 48000, Turkey; Department of Chemistry, Bülent Ecevit University, Zonguldak 67100, Turkey
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Cirillo V, Clements BA, Guarino V, Bushman J, Kohn J, Ambrosio L. A comparison of the performance of mono- and bi-component electrospun conduits in a rat sciatic model. Biomaterials 2014; 35:8970-82. [PMID: 25085857 DOI: 10.1016/j.biomaterials.2014.07.010] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Accepted: 07/10/2014] [Indexed: 12/16/2022]
Abstract
Synthetic nerve conduits represent a promising strategy to enhance functional recovery in peripheral nerve injury repair. However, the efficiency of synthetic nerve conduits is often compromised by the lack of molecular factors to create an enriched microenvironment for nerve regeneration. Here, we investigate the in vivo response of mono (MC) and bi-component (BC) fibrous conduits obtained by processing via electrospinning poly(ε-caprolactone) (PCL) and gelatin solutions. In vitro studies demonstrate that the inclusion of gelatin leads to uniform electrospun fiber size and positively influences the response of Dorsal Root Ganglia (DRGs) neurons as confirmed by the preferential extensions of neurites from DRG bodies. This behavior can be attributed to gelatin as a bioactive cue for the cultured DRG and to the reduced fibers size. However, in vivo studies in rat sciatic nerve defect model show an opposite response: MC conduits stimulate superior nerve regeneration than gelatin containing PCL conduits as confirmed by electrophysiology, muscle weight and histology. The G-ratio, 0.71 ± 0.07 for MC and 0.66 ± 0.05 for autograft, is close to 0.6, the value measured in healthy nerves. In contrast, BC implants elicited a strong host response and infiltrating tissue occluded the conduits preventing the formation of myelinated axons. Therefore, although gelatin promotes in vitro nerve regeneration, we conclude that bi-component electrospun conduits are not satisfactory in vivo due to intrinsic limits to their mechanical performance and degradation kinetics, which are essential to peripheral nerve regeneration in vivo.
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Affiliation(s)
- Valentina Cirillo
- Institute of Polymers, Composites and Biomaterials, National Research Council of Italy (IPCB-CNR), Viale Kennedy 54, Naples 80125, Italy; Department of Chemical, Materials and Industrial Production Engineering (DICMAPI), University of Naples Federico II, P.leTecchio 80, Naples 80125, Italy
| | - Basak A Clements
- New Jersey Center for Biomaterials, Rutgers - The State University of NJ, 145 Bevier Road, Piscataway, NJ 08854, USA
| | - Vincenzo Guarino
- Institute of Polymers, Composites and Biomaterials, National Research Council of Italy (IPCB-CNR), Viale Kennedy 54, Naples 80125, Italy.
| | - Jared Bushman
- New Jersey Center for Biomaterials, Rutgers - The State University of NJ, 145 Bevier Road, Piscataway, NJ 08854, USA
| | - Joachim Kohn
- New Jersey Center for Biomaterials, Rutgers - The State University of NJ, 145 Bevier Road, Piscataway, NJ 08854, USA
| | - Luigi Ambrosio
- Institute of Polymers, Composites and Biomaterials, National Research Council of Italy (IPCB-CNR), Viale Kennedy 54, Naples 80125, Italy
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Hsueh YS, Savitha S, Sadhasivam S, Lin FH, Shieh MJ. Design and synthesis of elastin-like polypeptides for an ideal nerve conduit in peripheral nerve regeneration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 38:119-26. [PMID: 24656360 DOI: 10.1016/j.msec.2014.01.058] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2013] [Revised: 12/30/2013] [Accepted: 01/30/2014] [Indexed: 01/26/2023]
Abstract
The study involves design and synthesis of three different elastin like polypeptide (ELP) gene monomers namely ELP1, ELP2 and ELP3 that encode for ELP proteins. The formed ELPs were assessed as an ideal nerve conduit for peripheral nerve regeneration. ELP1 was constructed with a small elongated pentapeptide carrying VPGVG sequence to mimic the natural polypeptide ELP. The ELP2 was designed by the incorporation of 4-penta peptide chains to improve the biocompatibility and mechanical strength. Thus, the third position in unique VPGVG was replaced with alanine to VPAVG and in a similar way modified to VPGKG, VPGEG and VPGIG with the substitution of lysine, glutamic acid and isoleucine. In ELP3, fibronectin C5 domain endowed with REDV sequence was introduced to improve the cell attachment. The ELP1, ELP2 and ELP3 proteins expressed by Escherichia coli were purified by inverse transition cycling (ITC). The purified ELPs were confirmed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) and western blotting. The Schwann cell (SC) morphology and cell adhesion were assessed by fabrication of ELP membrane cross-linked with glutaraledhyde. The Schwann cell proliferation was measured by WST-1 assay. Immunofluorostaining of Schwann cells was accomplished with SC specific phenotypic marker, S100.
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Affiliation(s)
- Yu-Sheng Hsueh
- Institute of Biomedical Engineering, College of Engineering, National Taiwan University, Taipei 100, Taiwan; Institute of Biomedical Engineering, College of Medicine, National Taiwan University, Taipei 100, Taiwan
| | - S Savitha
- Institute of Biomedical Engineering, College of Engineering, National Taiwan University, Taipei 100, Taiwan; Department of Biotechnology, Sree Sastha Institute of Engineering and Technology, Chennai, India; Institute of Biomedical Engineering, College of Medicine, National Taiwan University, Taipei 100, Taiwan
| | - S Sadhasivam
- Division of Biomedical Engineering and Nanomedicine Research, National Health Research Institutes, Miaoli 350, Taiwan
| | - Feng-Huei Lin
- Institute of Biomedical Engineering, College of Engineering, National Taiwan University, Taipei 100, Taiwan; Division of Biomedical Engineering and Nanomedicine Research, National Health Research Institutes, Miaoli 350, Taiwan; Institute of Biomedical Engineering, College of Medicine, National Taiwan University, Taipei 100, Taiwan.
| | - Ming-Jium Shieh
- Institute of Biomedical Engineering, College of Engineering, National Taiwan University, Taipei 100, Taiwan; College of Medicine, National Taiwan University Hospital, Taipei 100, Taiwan; Institute of Biomedical Engineering, College of Medicine, National Taiwan University, Taipei 100, Taiwan
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Choi JS, Oh SH, An HY, Kim YM, Lee JH, Lim JY. Functional regeneration of recurrent laryngeal nerve injury during thyroid surgery using an asymmetrically porous nerve guide conduit in an animal model. Thyroid 2014; 24:52-9. [PMID: 24015805 PMCID: PMC3887462 DOI: 10.1089/thy.2013.0338] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND Vocal cord paralysis (VCP) caused by recurrent laryngeal nerve (RLN) damage during thyroidectomy commonly results in serious medico-legal problems. The purpose of this study was to evaluate the usefulness of an asymmetrically porous polycaprolactone (PCL)/Pluronic F127 nerve guide conduit (NGC) for functional regeneration in a RLN injury animal model. METHODS A biodegradable, asymmetrically porous PCL/F127 NGC with selective permeability was fabricated for use in this study. A 10-mm segment of left RLN was resected in 28 New Zealand white rabbits, and then an asymmetrically porous NGC or a nonporous silicone tube was interposed between both stumps and securely fixed. Vocal cord mobility was endoscopically evaluated at one, four, and eight weeks postoperatively. Nerve growth through NGCs was assessed by toluidine blue staining, and thyroarytenoid (TA) muscle atrophy was evaluated by hematoxylin and eosin staining. Immunohistochemical stainings for acetylcholinesterase (AchE), anti-neurofilament (NF), and anti-S100 protein were also conducted, and transmission electron microscopy (TEM) was used to evaluate functional nerve regeneration. RESULTS At eight weeks postoperatively, endoscopic evaluations showed significantly better recovery from VCP in the asymmetrically porous PCL/F127 NGC group (6 of 10 rabbits) than in the silicone tube group (1 of 10 rabbits). Continued nerve growth on the damaged nerve endings was observed with time in the asymmetrically porous PCL/F127 NGC-interposed RLNs. TA muscle dimensions and AchE expressions in TA muscle were significantly greater in the asymmetrically porous PCL/F127 NGC group than in the silicone tube group. Furthermore, immunohistochemical staining revealed the expression of NF and S100 protein in the regenerated nerves in the asymmetrically porous PCL/F127 NGC group at eight weeks postoperatively, and at this time, TEM imaging showed myelinated axons in the regenerated RLNs. CONCLUSION The study shows that asymmetrically porous PCL/F127 NGC provides a favorable environment for RLN regeneration and that it has therapeutic potential for the regeneration of RLN damage.
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Affiliation(s)
- Jeong-Seok Choi
- Department of Otorhinolaryngology–Head and Neck Surgery, Inha University School of Medicine, Incheon, Republic of Korea
- Translational Research Center, Inha University School of Medicine, Incheon, Republic of Korea
| | - Se Heang Oh
- Department of Nanobiomedical Science & WCU Research Center, Dankook University, Cheonan, Republic of Korea
| | - Hye-Young An
- Department of Otorhinolaryngology–Head and Neck Surgery, Inha University School of Medicine, Incheon, Republic of Korea
- Translational Research Center, Inha University School of Medicine, Incheon, Republic of Korea
| | - Young-Mo Kim
- Department of Otorhinolaryngology–Head and Neck Surgery, Inha University School of Medicine, Incheon, Republic of Korea
- Translational Research Center, Inha University School of Medicine, Incheon, Republic of Korea
| | - Jin Ho Lee
- Department of Advanced Materials, Hannam University, Daejeon, Republic of Korea
| | - Jae-Yol Lim
- Department of Otorhinolaryngology–Head and Neck Surgery, Inha University School of Medicine, Incheon, Republic of Korea
- Translational Research Center, Inha University School of Medicine, Incheon, Republic of Korea
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11
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García-García JM, Bernal MM, Verdejo R, López-Manchado MA, Doncel-Pérez E, Garrido L, Quijada-Garrido I. Semiconductive bionanocomposites of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) and MWCNTs for neural growth applications. ACTA ACUST UNITED AC 2013. [DOI: 10.1002/polb.23417] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- José M. García-García
- Instituto de Ciencia y Tecnología de Polímeros; ICTP-CSIC, Juan de la Cierva 3 Madrid 28006 Spain
| | - M. Mar Bernal
- Instituto de Ciencia y Tecnología de Polímeros; ICTP-CSIC, Juan de la Cierva 3 Madrid 28006 Spain
| | - Raquel Verdejo
- Instituto de Ciencia y Tecnología de Polímeros; ICTP-CSIC, Juan de la Cierva 3 Madrid 28006 Spain
| | - Miguel A. López-Manchado
- Instituto de Ciencia y Tecnología de Polímeros; ICTP-CSIC, Juan de la Cierva 3 Madrid 28006 Spain
| | - Ernesto Doncel-Pérez
- Grupo de Química Neuro-Regenerativa Unidad Neurología Experimental; Hospital Nacional de Parapléjicos; 45071 Toledo Spain
| | - Leoncio Garrido
- Instituto de Ciencia y Tecnología de Polímeros; ICTP-CSIC, Juan de la Cierva 3 Madrid 28006 Spain
| | - Isabel Quijada-Garrido
- Instituto de Ciencia y Tecnología de Polímeros; ICTP-CSIC, Juan de la Cierva 3 Madrid 28006 Spain
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12
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Ikeda M, Uemura T, Takamatsu K, Okada M, Kazuki K, Tabata Y, Ikada Y, Nakamura H. Acceleration of peripheral nerve regeneration using nerve conduits in combination with induced pluripotent stem cell technology and a basic fibroblast growth factor drug delivery system. J Biomed Mater Res A 2013; 102:1370-8. [PMID: 23733515 DOI: 10.1002/jbm.a.34816] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2013] [Revised: 04/02/2013] [Accepted: 05/17/2013] [Indexed: 12/14/2022]
Abstract
Various modifications including addition of Schwann cells or incorporation of growth factors with bioabsorbable nerve conduits have been explored as options for peripheral nerve repair. However, no reports of nerve conduits containing both supportive cells and growth factors have been published as a regenerative therapy for peripheral nerves. In the present study, sciatic nerve gaps in mice were reconstructed in the following groups: nerve conduit alone (control group), nerve conduit coated with induced pluripotent stem cell (iPSc)-derived neurospheres (iPSc group), nerve conduit coated with iPSc-derived neurospheres and basic fibroblast growth factor (bFGF)-incorporated gelatin microspheres (iPSc + bFGF group), and autograft. The fastest functional recovery and the greatest axon regeneration occurred in the autograft group, followed in order by the iPSc + bFGF group, iPSc group, and control group until 12 weeks after reconstruction. Thus, peripheral nerve regeneration using nerve conduits and functional recovery in mice was accelerated by a combination of iPSc-derived neurospheres and a bFGF drug delivery system. The combination of all three fundamental methodologies, iPSc technology for supportive cells, bioabsorbable nerve conduits for scaffolds, and a bFGF drug delivery system for growth factors, was essential for peripheral nerve regenerative therapy.
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Affiliation(s)
- Mikinori Ikeda
- Department of Orthopaedic Surgery, Osaka City University Graduate School of Medicine, Osaka, Japan
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13
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Ganga MVM, Coutinho-Netto J, Colli BO, Marques Junior W, Catalão CHR, Santana RT, Oltramari MRP, Carraro KT, Lachat JJ, Lopes LDS. Sciatic nerve regeneration in rats by a nerve conduit engineering with a membrane derived from natural latex. Acta Cir Bras 2012. [DOI: 10.1590/s0102-86502012001200010] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
PURPOSE: To evaluate the capacity of natural latex membrane to accelerate and improve the regeneration quality of the of rat sciatic nerves. METHODS: Forty male adult Wistar rats were used, anesthetized and operated to cut the sciatic nerve and receive an autograft or a conduit made with a membrane derived from natural latex (Hevea brasiliensis). Four or eight weeks after surgery, to investigate motor nerve recovery, we analyzed the neurological function by walking pattern (footprints analysis and computerized treadmill), electrophysiological evaluation and histological analysis of regenerated nerve (autologous nerve graft or tissue cables between the nerve stumps), and anterior tibial and gastrocnemius muscles. RESULTS: All functional and morphological analysis showed that the rats transplanted with latex conduit had a better neurological recovery than those operated with autologous nerve: quality of footprints, performance on treadmill (p<0.01), electrophysiological response (p<0.05), and quality of histological aspects on neural regeneration. CONCLUSION: The data reported showed behavioral and functional recovery in rats implanted with latex conduit for sciatic nerve repair, supporting a complete morphological and physiological regeneration of the nerve.
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14
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Park SY, Ki CS, Park YH, Lee KG, Kang SW, Kweon HY, Kim HJ. Functional recovery guided by an electrospun silk fibroin conduit after sciatic nerve injury in rats. J Tissue Eng Regen Med 2012; 9:66-76. [DOI: 10.1002/term.1615] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2011] [Revised: 05/15/2012] [Accepted: 08/25/2012] [Indexed: 12/31/2022]
Affiliation(s)
- Sook Young Park
- Department of Dental Anesthesiology and Dental Research Institute, School of Dentistry; Seoul National University; Seoul 110-768 Republic of Korea
| | - Chang Seok Ki
- Cosmetics and Personal Care Research Institute; Amorepacific Corporation R&D Center; Yongin 446-729 Republic of Korea
| | - Young Hwan Park
- Department of Biosystems and Biomaterials Science and Engineering; Seoul National University; Seoul 151-921 Republic of Korea
| | - Kwang Gill Lee
- Rural Development Administration; National Academy of Agricultural Science; Suwon Republic of Korea
| | - Seok Woo Kang
- Rural Development Administration; National Academy of Agricultural Science; Suwon Republic of Korea
| | - Hae Yong Kweon
- Rural Development Administration; National Academy of Agricultural Science; Suwon Republic of Korea
| | - Hyun Jeong Kim
- Department of Dental Anesthesiology and Dental Research Institute, School of Dentistry; Seoul National University; Seoul 110-768 Republic of Korea
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15
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Wang W, Lin JH, Tsai CC, Chuang HC, Ho CY, Yao CH, Chen YS. Biodegradable Glutaraldehyde-crosslinked Casein Conduit Promotes Regeneration after Peripheral Nerve Injury in Adult Rats. Macromol Biosci 2011; 11:914-26. [DOI: 10.1002/mabi.201000498] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2010] [Revised: 03/18/2011] [Indexed: 12/18/2022]
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PDLLA/chondroitin sulfate/chitosan/NGF conduits for peripheral nerve regeneration. Biomaterials 2011; 32:4506-16. [PMID: 21397324 DOI: 10.1016/j.biomaterials.2011.02.023] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2010] [Accepted: 02/12/2011] [Indexed: 01/10/2023]
Abstract
Biodegradable PDLLA/Chondroitin sulfate/Chitosan(PDLLA/CS/CHS) nerve conduits with potentially good biocompatibility and good mechanical property feasible for surgical manipulation have been developed in our previous work. The purpose of this study was to investigate their possible application in repairing damaged nerves and the effect of nerve growth factor (NGF). The PDLLA/CS/CHS/NGF nerve conduits were prepared by immobilizing NGF onto the PDLLA/CS/CHS nerve conduits with carbodiimide. Adult Sprague-Dawley (SD) rats weighing 200-250 g were used as the animal model. The conduits were employed to bridge the 10 mm defects in the sciatic nerve of the SD rats. Nerve conduction velocities (NCVs) were clearly detected in both nerve conduits after 3 months of implantation, indicating a rapid functional recovery for the disrupted nerves. The results of histological sections showed that the internal sides of the conduits were compact enough to prevent the connective tissues from ingrowth. Combined with the strong mechanical properties, good nerve regeneration ability and non-toxicity of its degradation products, PDLLA/CS/CHS nerve conduits would be expected to be useful materials to repair nerve damage and NGF can effectively promote the regeneration of peripheral nerve defect.
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17
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Wan Y, Gao J, Zhang J, Peng W, Qiu G. Biodegradability of conducting chitosan-g-polycaprolactone/polypyrrole conduits. Polym Degrad Stab 2010. [DOI: 10.1016/j.polymdegradstab.2010.07.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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18
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Controlling dispersion of axonal regeneration using a multichannel collagen nerve conduit. Biomaterials 2010; 31:5789-97. [PMID: 20430432 DOI: 10.1016/j.biomaterials.2010.03.081] [Citation(s) in RCA: 158] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2010] [Accepted: 03/30/2010] [Indexed: 12/17/2022]
Abstract
Single channel conduits are used clinically in nerve repair as an alternative to the autologous nerve graft. Axons regenerating across single channel tubes, however, may disperse resulting in inappropriate target reinnervation. This dispersion may be limited by multichannel nerve conduits as they resemble the structure of nerve multiple basal lamina tubes. In this study, we investigated the influence of channel number on the axonal regeneration using a series of 1-, 2-, 4-, and 7-channel collagen conduits and commercial (NeuraGen) single channel conduits. Nerve conduits were implanted in rats with a 1 cm gap of sciatic nerve. After four months, quantitative results of regeneration were evaluated with nerve morphometry and the accuracy of regeneration was assessed using retrograde tracing: two tracers being applied simultaneously to tibial and peroneal nerves to determine the percentage of motor neurons with double projections. Recovery of function was investigated with compound muscle action potential recordings and ankle motion analysis. We showed that the fabricated 1-channel and 4-channel conduits are superior to other types of conduits in axonal regeneration. Simultaneous tracing showed a significantly lower percentage of motor neurons with double projections after 2- and 4-channel compared with 1-channel conduit repair. This study shows the potential influence of multichannel guidance on limiting dispersion without decreasing quantitative results of regeneration.
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19
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Sinis N, Kraus A, Tselis N, Haerle M, Werdin F, Schaller HE. Functional recovery after implantation of artificial nerve grafts in the rat- a systematic review. J Brachial Plex Peripher Nerve Inj 2009; 4:19. [PMID: 19852862 PMCID: PMC2770034 DOI: 10.1186/1749-7221-4-19] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2009] [Accepted: 10/25/2009] [Indexed: 01/26/2023] Open
Abstract
Purpose The aim of this study was to compare functional data of different nerve-gap bridging materials evaluated in rat experiments by means of a systematic review. Materials and methods A systematic review was conducted, searching MEDLINE, HTS and CENTRAL to identify all trials evaluating functional recovery of artificial nerve conduits in the rat model. Results There was a trend towards a favourable outcome of conduits coated with Schwann-cells compared to the plain synthetics. Histomorphometry, electrophysiology and muscle-weight correlated poorly with functional outcome. Conclusion Schwann-cell coated conduits showed promising results concerning functional recovery. Further standardization in outcome reporting is encouraged.
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Affiliation(s)
- Nektarios Sinis
- Clinic for Hand, Plastic, Reconstructive and Burn Surgery, BG Trauma Center, Eberhard-Karls University, Schnarrenbergstrasse 95, D-72076 Tuebingen, Germany
| | - Armin Kraus
- Clinic for Hand, Plastic, Reconstructive and Burn Surgery, BG Trauma Center, Eberhard-Karls University, Schnarrenbergstrasse 95, D-72076 Tuebingen, Germany
| | - Nikolaos Tselis
- Dept of Radiotherapy, Hospital of Offenbach, Starkenburgring 66, D-63069 Offenbach, Germany
| | - Max Haerle
- Dept of Hand and Plastic Surgery, Orthopaedic Hospital Markgroeningen, Kurt-Lindemann-Weg 10 D-71706 Markgroeningen, Germany
| | - Frank Werdin
- Clinic for Hand, Plastic, Reconstructive and Burn Surgery, BG Trauma Center, Eberhard-Karls University, Schnarrenbergstrasse 95, D-72076 Tuebingen, Germany
| | - Hans-Eberhard Schaller
- Clinic for Hand, Plastic, Reconstructive and Burn Surgery, BG Trauma Center, Eberhard-Karls University, Schnarrenbergstrasse 95, D-72076 Tuebingen, Germany
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20
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Preparation and Integration of Human Amnion Nerve Conduits Using a Light-Activated Technique. Plast Reconstr Surg 2009; 124:428-437. [DOI: 10.1097/prs.0b013e3181af010c] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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21
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Benesch J, Mano JF, Reis RL. Proteins and Their Peptide Motifs in Acellular Apatite Mineralization of Scaffolds for Tissue Engineering. TISSUE ENGINEERING PART B-REVIEWS 2008; 14:433-45. [DOI: 10.1089/ten.teb.2008.0121] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Johan Benesch
- 3B's Research Group—Biomaterials, Biodegradables, and Biomimetics, Department of Polymer Engineering, University of Minho, Caldas das Taipas, Portugal
- IBB—Institute for Biotechnology and Bioengineering, PT Government Associated Laboratory, Braga, Portugal
| | - João F. Mano
- 3B's Research Group—Biomaterials, Biodegradables, and Biomimetics, Department of Polymer Engineering, University of Minho, Caldas das Taipas, Portugal
- IBB—Institute for Biotechnology and Bioengineering, PT Government Associated Laboratory, Braga, Portugal
| | - Rui L. Reis
- 3B's Research Group—Biomaterials, Biodegradables, and Biomimetics, Department of Polymer Engineering, University of Minho, Caldas das Taipas, Portugal
- IBB—Institute for Biotechnology and Bioengineering, PT Government Associated Laboratory, Braga, Portugal
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Bian YZ, Wang Y, Aibaidoula G, Chen GQ, Wu Q. Evaluation of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) conduits for peripheral nerve regeneration. Biomaterials 2008; 30:217-25. [PMID: 18849069 DOI: 10.1016/j.biomaterials.2008.09.036] [Citation(s) in RCA: 112] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2008] [Accepted: 09/15/2008] [Indexed: 11/29/2022]
Abstract
Poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBHHx) was investigated for possible application in repairing damaged nerves. Porous nerve conduits with both uniform wall porosity and non-uniform wall porosity were prepared using a particle leaching method. Adult Sprague-Dawley (SD) rats weighing 200-250 g were used as the animal model. The conduits were employed to bridge the 10mm defects in the sciatic nerve of the Sprague-Dawley (SD) rats. Mechanical tests showed that the PHBHHx nerve conduits had proper mechanical properties including maximal loads of 3.1N and 1.3N for the conduits with non-uniform wall porosity and with uniform wall porosity, respectively, and maximal stresses of 2.3 MPa and 0.94 MPa for the conduits with non-uniform wall porosity and with uniform wall porosity, respectively. At the same time, both types of conduits were permeable to three compounds tested including glucose, lysozyme and bovine serum albumin, indicating the suitability of the conduits for free exchanges of nutrients. Compound Muscle Action Potentials (CMAPs) were clearly observed in both types of the PHBHHx nerve conduits after 1 month of implantation, indicating a rapid functional recovery for the disrupted nerves. The results of histological sections demonstrated that the internal sides of the conduits with non-uniform wall porosity were compact enough to prevent the connective tissues from ingrowth penetration. After implantation for 3 months in the rats, the conduits with uniform wall porosity and those with non-uniform wall porosity lost 24% and 20% of their original weight average molecular weights, respectively. Combined with the strong mechanical properties, good nerve regeneration ability and non-toxicity of its degradation products, PHBHHx nerve conduits can be developed into a useful material to repair nerve damage.
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Affiliation(s)
- Yu-Zhu Bian
- Protein Science Laboratory of Ministry of Education, Department of Biological Sciences and Biotechnology, Tsinghua University, Beijing 100084, China
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23
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Oh SH, Kim JH, Song KS, Jeon BH, Yoon JH, Seo TB, Namgung U, Lee IW, Lee JH. Peripheral nerve regeneration within an asymmetrically porous PLGA/Pluronic F127 nerve guide conduit. Biomaterials 2008; 29:1601-9. [DOI: 10.1016/j.biomaterials.2007.11.036] [Citation(s) in RCA: 128] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2007] [Accepted: 11/24/2007] [Indexed: 10/22/2022]
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Abstract
Peripheral nerves are essential connections between the central nervous system and muscles, autonomic structures and sensory organs. Their injury is one of the major causes for severe and longstanding impairment in limb function. Acute peripheral nerve lesion has an important inflammatory component and is considered as ischemia-reperfusion (IR) injury. Surgical repair has been the standard of care in peripheral nerve lesion. It has reached optimal technical development but the end results still remain unpredictable and complete functional recovery is rare. Nevertheless, nerve repair is not primarily a mechanical problem and microsurgery is not the only key to success. Lately, there have been efforts to develop alternatives to nerve graft. Work has been carried out in basal lamina scaffolds, biologic and non-biologic structures in combination with neurotrophic factors and/or Schwann cells, tissues, immunosuppressive agents, growth factors, cell transplantation, principles of artificial sensory function, gene technology, gangliosides, implantation of microchips, hormones, electromagnetic fields and hyperbaric oxygenation (HBO). HBO appears to be a beneficial adjunctive treatment for surgical repair in the acute peripheral nerve lesion, when used at lower pressures and in a timely fashion (<6 hours).
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Affiliation(s)
- E Cuauhtemoc Sanchez
- Hyperbaric Medicine Department, Hospital Angeles del Pedregal, Mexico, DF, Mexico.
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Abstract
Nerve regeneration is a complex biological phenomenon. Once the nervous system is impaired, its recovery is difficult and malfunctions in other parts of the body may occur because mature neurons do not undergo cell division. To increase the prospects of axonal regeneration and functional recovery, researches have focused on designing "nerve guidance channels" or "nerve conduits." When developing ideal tissue-engineered nerve conduits, several components come to mind. They include a biodegradable and porous channel wall, the ability to deliver bioactive growth factors, incorporation of support cells, an internal oriented matrix to support cell migration, intraluminal channels to mimic the structure of nerve fascicles, and electrical activities. This article reviews the factors that are critical for nerve repair, and the advanced technologies that are explored to fabricate nerve conduits. To more accurately mimic natural repair in the body, recent studies have focused on the use of various advanced approaches to create ideal nerve conduits that combine multiple stimuli in an effort to better mimic the complex signals normally found in the body.
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Affiliation(s)
- Yi-Cheng Huang
- Institute of Biomedical Engineering, College of Engineering, College of Medicine, National Taiwan University, Taipei, Taiwan.
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