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Wang F, Wang H, Shan X, Mei J, Wei P, Song Q, Chen W. High-strength and high-toughness ECM films with the potential for peripheral nerve repair. Biomed Mater 2023; 19:015010. [PMID: 38048625 DOI: 10.1088/1748-605x/ad11fa] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Accepted: 12/04/2023] [Indexed: 12/06/2023]
Abstract
Extracellular matrix (ECM) scaffolds are widely applied in the field of regeneration as the result of their irreplaceable biological advantages, and the preparation of ECM scaffolds into ECM hydrogels expands the applications to some extent. However, weak mechanical properties of current ECM materials limit the complete exploitation of ECM's biological advantages. To enable ECM materials to be utilized in applications requiring high strength, herein, we created a kind of new ECM material, ECM film, and evaluated its mechanical properties. ECM films exhibited outstanding toughness with no cracks after arbitrarily folding and crumpling, and dramatically high strength levels of 86 ± 17.25 MPa, the maximum of which was 115 MPa. Such spectacular high-strength and high-toughness films, containing only pure ECM without any crosslinking agents and other materials, far exceed current pure natural polymer gel films and even many composite gel films and synthetic polymer gel films. In addition, both PC12 cells and Schwann cells cultured on the surface of ECM films, especially Schwann cells, showed good proliferation, and the neurite outgrowth of the PC12 cells was promoted, indicating the application potential of ECM film in peripheral nerve repair.
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Affiliation(s)
- Fangfang Wang
- Medical Research Center, The First Affiliated Hospital of Ningbo University; Ningbo University, Ningbo 315010, People's Republic of China
- Key Laboratory of Precision Medicine for Atherosclerotic Diseases of Zhejiang Province, Ningbo 315010, People's Republic of China
- Department of Plastic and Reconstructive Surgery, The First Affiliated Hospital of Ningbo University, Ningbo University, Ningbo 315010, People's Republic of China
| | - Haiyang Wang
- Institute of Bioscaffold Transplantation and Immunology, Wenzhou Medical University, Wenzhou 325035, People's Republic of China
| | - Xiaotong Shan
- Department of Nephrology, The First Affiliated Hospital of Ningbo University, Ningbo University, Ningbo 315010, People's Republic of China
| | - Jin Mei
- Medical Research Center, The First Affiliated Hospital of Ningbo University; Ningbo University, Ningbo 315010, People's Republic of China
- Institute of Bioscaffold Transplantation and Immunology, Wenzhou Medical University, Wenzhou 325035, People's Republic of China
- Department of Plastic and Reconstructive Surgery, The First Affiliated Hospital of Ningbo University, Ningbo University, Ningbo 315010, People's Republic of China
| | - Peng Wei
- Department of Plastic and Reconstructive Surgery, The First Affiliated Hospital of Ningbo University, Ningbo University, Ningbo 315010, People's Republic of China
| | - Qinghua Song
- Department of Plastic and Reconstructive Surgery, The First Affiliated Hospital of Ningbo University, Ningbo University, Ningbo 315010, People's Republic of China
| | - Weiwei Chen
- Department of Plastic and Reconstructive Surgery, The First Affiliated Hospital of Ningbo University, Ningbo University, Ningbo 315010, People's Republic of China
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Wu S, Shen W, Ge X, Ao F, Zheng Y, Wang Y, Jia X, Mao Y, Luo Y. Advances in Large Gap Peripheral Nerve Injury Repair and Regeneration with Bridging Nerve Guidance Conduits. Macromol Biosci 2023; 23:e2300078. [PMID: 37235853 DOI: 10.1002/mabi.202300078] [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: 02/27/2023] [Revised: 05/10/2023] [Indexed: 05/28/2023]
Abstract
Peripheral nerve injury is a common complication of accidents and diseases. The traditional autologous nerve graft approach remains the gold standard for the treatment of nerve injuries. While sources of autologous nerve grafts are very limited and difficult to obtain. Nerve guidance conduits are widely used in the treatment of peripheral nerve injuries as an alternative to nerve autografts and allografts. However, the development of nerve conduits does not meet the needs of large gap peripheral nerve injury. Functional nerve conduits can provide a good microenvironment for axon elongation and myelin regeneration. Herein, the manufacturing methods and different design types of functional bridging nerve conduits for nerve conduits combined with electrical or magnetic stimulation and loaded with Schwann cells, etc., are summarized. It summarizes the literature and finds that the technical solutions of functional nerve conduits with electrical stimulation, magnetic stimulation and nerve conduits combined with Schwann cells can be used as effective strategies for bridging large gap nerve injury and provide an effective way for the study of large gap nerve injury repair. In addition, functional nerve conduits provide a new way to construct delivery systems for drugs and growth factors in vivo.
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Affiliation(s)
- Shang Wu
- School of Biological and Pharmaceutical Sciences, Shaanxi University of Science and Technology, Xi'an, 710021, P. R. China
| | - Wen Shen
- School of Biological and Pharmaceutical Sciences, Shaanxi University of Science and Technology, Xi'an, 710021, P. R. China
| | - Xuemei Ge
- College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing, 210037, P. R. China
| | - Fen Ao
- College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, P. R. China
| | - Yan Zheng
- School of Biological and Pharmaceutical Sciences, Shaanxi University of Science and Technology, Xi'an, 710021, P. R. China
| | - Yigang Wang
- Department of Pharmacy, No. 215 Hospital of Shaanxi Nuclear Industry, Xianyang, Shaanxi, 712000, P. R. China
| | - Xiaoni Jia
- Central Laboratory, Xi'an Mental Health Center, Xi'an, 710061, P. R. China
| | - Yueyang Mao
- School of Biological and Pharmaceutical Sciences, Shaanxi University of Science and Technology, Xi'an, 710021, P. R. China
| | - Yali Luo
- College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing, 210037, P. R. China
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Zhang M, An H, Gu Z, Huang Z, Zhang F, Jiang BG, Wen Y, Zhang P. Mimosa-Inspired Stimuli-Responsive Curling Bioadhesive Tape Promotes Peripheral Nerve Regeneration. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2212015. [PMID: 37205796 DOI: 10.1002/adma.202212015] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 05/14/2023] [Indexed: 05/21/2023]
Abstract
Trauma often results in peripheral nerve injuries (PNIs). These injuries are particularly challenging therapeutically because of variable nerve diameters, slow axonal regeneration, infection of severed ends, fragility of the nerve tissue, and the intricacy of surgical intervention. Surgical suturing is likely to cause additional damage to peripheral nerves. Therefore, an ideal nerve scaffold should possess good biocompatibility, diameter adaptability, and a stable biological interface for seamless biointegration with tissues. Inspired by the curl of Mimosa pudica, this study aimed to design and develop a diameter-adaptable, suture-free, stimulated curling bioadhesive tape (SCT) hydrogel for repairing PNI. The hydrogel is fabricated from chitosan and acrylic acid-N-hydroxysuccinimide lipid via gradient crosslinking using glutaraldehyde. It closely matches the nerves of different individuals and regions, thereby providing a bionic scaffold for axonal regeneration. In addition, this hydrogel rapidly absorbs tissue fluid from the nerve surface achieving durable wet-interface adhesion. Furthermore, the chitosan-based SCT hydrogel loaded with insulin-like growth factor-I effectively promotes peripheral nerve regeneration with excellent bioactivity. This procedure for peripheral nerve injury repair using the SCT hydrogel is simple and reduces the difficulty and duration of surgery, thereby advancing adaptive biointerfaces and reliable materials for nerve repair.
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Affiliation(s)
- Meng Zhang
- Department of Orthopedics and Trauma, Peking University People's Hospital, Key Laboratory of Trauma and Neural Regeneration (Peking University), Ministry of Education, National Center for Trauma Medicine, Beijing, 100044, China
| | - Heng An
- Beijing Key Laboratory for Bioengineering and Sensing Technology, Daxing Research Institute, School of Chemistry & Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Zhen Gu
- Beijing Key Laboratory for Bioengineering and Sensing Technology, Daxing Research Institute, School of Chemistry & Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Zhe Huang
- Beijing Key Laboratory for Bioengineering and Sensing Technology, Daxing Research Institute, School of Chemistry & Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Fengshi Zhang
- Department of Orthopedics and Trauma, Peking University People's Hospital, Key Laboratory of Trauma and Neural Regeneration (Peking University), Ministry of Education, National Center for Trauma Medicine, Beijing, 100044, China
| | - Bao-Guo Jiang
- Department of Orthopedics and Trauma, Peking University People's Hospital, Key Laboratory of Trauma and Neural Regeneration (Peking University), Ministry of Education, National Center for Trauma Medicine, Beijing, 100044, China
| | - Yongqiang Wen
- Beijing Key Laboratory for Bioengineering and Sensing Technology, Daxing Research Institute, School of Chemistry & Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Peixun Zhang
- Department of Orthopedics and Trauma, Peking University People's Hospital, Key Laboratory of Trauma and Neural Regeneration (Peking University), Ministry of Education, National Center for Trauma Medicine, Beijing, 100044, China
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4
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Al-Saedi HF, Ghanimi HA, Khoshnazar SM, Ghayour MB, Abdolmaleki A. Neuroprotective effects of celastrol on sciatic nerve transection model in male Wistar rats. IRANIAN JOURNAL OF BASIC MEDICAL SCIENCES 2022; 25:1251-1259. [PMID: 36311198 PMCID: PMC9588314 DOI: 10.22038/ijbms.2022.66614.14617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Accepted: 09/05/2022] [Indexed: 01/24/2023]
Abstract
Objectives Celastrol is an herbal compound with neuroprotective properties. Our research aimed to assess the neuroprotective properties of celastrol on sciatic nerve transection in rats. Materials and Methods The rats' left sciatic nerve was cut and sutured directly. The animals were then given 1 or 2 mg/kg celastrol intraperitoneally for two weeks. The sensory and locomotor behaviors of the animals were then evaluated for 16 weeks. Immunohistochemistry, ELISA, and real-time PCR were also utilized to evaluate macrophage polarization, cytokine secretion, and neurotrophin expression in injured nerves. Results Results showed that both doses of celastrol significantly accelerated nerve regeneration and improved sensorimotor functional recovery when compared with controls. Nevertheless, administration of 2 mg/kg of celastrol significantly outperforms treatment with a dose of 1 mg/kg. Celastrol treatment-induced M2 polarization in macrophages decreased proinflammatory cytokines at the injury site. It also increased the expression of BDNF mRNA. Conclusion These findings suggest that a two-week treatment with celastrol had neuroprotective effects in a rat sciatic nerve transection model, most likely by inducing macrophage M2 polarization and anti-inflammatory effects.
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Affiliation(s)
| | | | - Seyedeh Mahdieh Khoshnazar
- Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran
| | - Mohammad B. Ghayour
- Department of Biology, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Arash Abdolmaleki
- Department of Biophysics, Faculty of Advanced Technologies, University of Mohaghegh Ardabili, Namin, Iran
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Ebhodaghe SO. Natural Polymeric Scaffolds for Tissue Engineering Applications. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2021; 32:2144-2194. [PMID: 34328068 DOI: 10.1080/09205063.2021.1958185] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Natural polymeric scaffolds can be used for tissue engineering applications such as cell delivery and cell-free supporting of native tissues. This is because of their desirable properties such as; high biocompatibility, tunable mechanical strength and conductivity, large surface area, porous- and extracellular matrix (ECM)-mimicked structures. Specifically, their less toxicity and biocompatibility makes them suitable for several tissue engineering applications. For these reasons, several biopolymeric scaffolds are currently being explored for numerous tissue engineering applications. To date, research on the nature, chemistry, and properties of nanocomposite biopolymers are been reported, while the need for a comprehensive research note on more tissue engineering application of these biopolymers remains. As a result, this present study comprehensively reviews the development of common natural biopolymers as scaffolds for tissue engineering applications such as cartilage tissue engineering, cornea repairs, osteochondral defect repairs, and nerve regeneration. More so, the implications of research findings for further studies are presented, while the impact of research advances on future research and other specific recommendations are added as well.
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Doblado LR, Martínez-Ramos C, Pradas MM. Biomaterials for Neural Tissue Engineering. FRONTIERS IN NANOTECHNOLOGY 2021. [DOI: 10.3389/fnano.2021.643507] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The therapy of neural nerve injuries that involve the disruption of axonal pathways or axonal tracts has taken a new dimension with the development of tissue engineering techniques. When peripheral nerve injury (PNI), spinal cord injury (SCI), traumatic brain injury (TBI), or neurodegenerative disease occur, the intricate architecture undergoes alterations leading to growth inhibition and loss of guidance through large distance. To improve the limitations of purely cell-based therapies, the neural tissue engineering philosophy has emerged. Efforts are being made to produce an ideal scaffold based on synthetic and natural polymers that match the exact biological and mechanical properties of the tissue. Furthermore, through combining several components (biomaterials, cells, molecules), axonal regrowth is facilitated to obtain a functional recovery of the neural nerve diseases. The main objective of this review is to investigate the recent approaches and applications of neural tissue engineering approaches.
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7
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Micro-grooved nerve guidance conduits combined with microfiber for rat sciatic nerve regeneration. J IND ENG CHEM 2020. [DOI: 10.1016/j.jiec.2020.07.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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8
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Zhang Z, Jørgensen ML, Wang Z, Amagat J, Wang Y, Li Q, Dong M, Chen M. 3D anisotropic photocatalytic architectures as bioactive nerve guidance conduits for peripheral neural regeneration. Biomaterials 2020; 253:120108. [DOI: 10.1016/j.biomaterials.2020.120108] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 04/28/2020] [Accepted: 05/07/2020] [Indexed: 12/12/2022]
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Vijayavenkataraman S. Nerve guide conduits for peripheral nerve injury repair: A review on design, materials and fabrication methods. Acta Biomater 2020; 106:54-69. [PMID: 32044456 DOI: 10.1016/j.actbio.2020.02.003] [Citation(s) in RCA: 237] [Impact Index Per Article: 59.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2019] [Revised: 02/04/2020] [Accepted: 02/04/2020] [Indexed: 12/19/2022]
Abstract
Peripheral nerves can sustain injuries due to loss of structure and/or function of peripheral nerves because of accident, trauma and other causes, which leads to partial or complete loss of sensory, motor, and autonomic functions and neuropathic pain. Even with the extensive knowledge on the pathophysiology and regeneration mechanisms of peripheral nerve injuries (PNI), reliable treatment methods that ensure full functional recovery are scant. Nerve autografting is the current gold standard for treatment of PNI. Given the limitations of autografts including donor site morbidity and limited supply, alternate treatment methods are being pursued by the researchers. Neural guide conduits (NGCs) are increasingly being considered as a potential alternative to nerve autografts. The anatomy of peripheral nerves, classification of PNI, and current treatment methods are briefly yet succinctly reviewed. A detailed review on the various designs of NGCs, the different materials used for making the NGCs, and the fabrication methods adopted is presented in this work. Much progress had been made in all the aspects of making an NGC, including the design, materials and fabrication techniques. The advent of advanced technologies such as additive manufacturing and 3D bioprinting could be beneficial in easing the production of patient-specific NGCs. NGCs with supporting cells or stem cells, NGCs loaded with neurotropic factors and drugs, and 4D printed NGCs are some of the futuristic areas of interest. STATEMENT OF SIGNIFICANCE: Neural guide conduits (NGCs) are increasingly being considered as a potential alternative to nerve autografts in the treatment of peripheral nerve injuries. A detailed review on the various designs of NGCs, the different materials used for making the NGCs, and the fabrication methods (including Additive Manufacturing) adopted is presented in this work.
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Affiliation(s)
- Sanjairaj Vijayavenkataraman
- Division of Engineering, New York University Abu Dhabi, UAE; Department of Mechanical and Aerospace Engineering, Tandon School of Engineering, New York University, NY, USA.
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10
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Jang SR, Kim JI, Park CH, Kim CS. The controlled design of electrospun PCL/silk/quercetin fibrous tubular scaffold using a modified wound coil collector and L-shaped ground design for neural repair. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 111:110776. [PMID: 32279813 DOI: 10.1016/j.msec.2020.110776] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 02/18/2020] [Accepted: 02/24/2020] [Indexed: 12/28/2022]
Abstract
Asymmetrically porous and aligned fibrous tubular conduit with selective permeability as a biomimetic neural scaffold was manufactured using polycaprolactone (PCL), silk, and quercetin by a modified electrospinning method. The outer surface of the randomly oriented fibrous scaffold had microscale pores that could prevent fibrous tissue invasion (FTI), but could permeate neurotrophic factors, nutrients, and oxygen. The inner surface of the aligned fibrous scaffold can be favorable for neurite outgrowth, because of their superior neural cell attachment, migration, and directional growth. In vitro and in vivo studies have demonstrated the therapeutic effect of Quercetin, a ubiquitous flavonoid widely distributed in plants, on neuropathy, by modulating the expression of NRF-2-dependent antioxidant responsive elements. In this study, the controlled inner and outer surface geometry of the 0.5, 1.0, and 2.0 wt% quercetin-containing electrospun PCL/silk fibrous tubular scaffold fabricated via a modified wound coil collector and L-shaped ground design (WCC-LG) was characterized by FE-SEM, TEM, FFT, FT-IR, and XRD. In addition, two types of neural cell lines, PC12 and S42, were used to evaluate the cell proliferation rate of the different amount of quercetin-loaded PCL/silk tubular scaffolds.
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Affiliation(s)
- Se Rim Jang
- Department of Bionanosystem Engineering, Graduate School, Jeonbuk National University, Jeonju 561-756, Republic of Korea
| | - Jeong In Kim
- Department of Bionanosystem Engineering, Graduate School, Jeonbuk National University, Jeonju 561-756, Republic of Korea
| | - Chan Hee Park
- Department of Bionanosystem Engineering, Graduate School, Jeonbuk National University, Jeonju 561-756, Republic of Korea; Division of Mechanical Design Engineering, College of Engineering, Jeonbuk National University, Jeonju 561-756, Republic of Korea.
| | - Cheol Sang Kim
- Department of Bionanosystem Engineering, Graduate School, Jeonbuk National University, Jeonju 561-756, Republic of Korea; Division of Mechanical Design Engineering, College of Engineering, Jeonbuk National University, Jeonju 561-756, Republic of Korea.
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11
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Seven F, Gölcez T, Yaralı ZB, Onak G, Karaman O, Şen M. Guiding neural extensions of PC12 cells on carbon nanotube tracks dielectrophoretically formed in poly(ethylene glycol) dimethacrylate. RSC Adv 2020; 10:26120-26125. [PMID: 35519760 PMCID: PMC9055325 DOI: 10.1039/d0ra04496b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Accepted: 07/04/2020] [Indexed: 11/21/2022] Open
Abstract
The PC12 cell line has been widely used as an in vitro model for studying neuronal differentiation and identifying the factors affecting the process. It has the ability to differentiate in the presence of nerve growth factor (NGF), resulting in neural extensions called dendrites and axons. In this study, first the impact of randomly distributed multi-walled carbon nanotubes (MWCNTs) in poly(ethylene glycol) dimethacrylate (PEGDMA) on PC12 cell differentiation was investigated in terms of neurite length, number of neurite per cell and differentiation marker gene expression profile. Then, dielectrophoretically aligned MWCNTs in PEGDMA was used to guide and support the neuronal differentiation of PC12 cells in the presence of NGF. The method is expected to be useful in revealing the nanotopographical role in fundamental studies and understanding of nanotopographical effects for biomedical applications on nerve regeneration. A schematic illustration of the strategy used to create a microenvironment consisting of micropatterns and CNT tracks. The new microenvironment allowed roughly positioning of PC12 cells and guidance of neural extensions.![]()
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Affiliation(s)
- Fikri Seven
- Izmir Katip Celebi University
- Graduate School of Natural and Applied Sciences
- Department of Biomedical Technologies/Master of Science
- Izmir
- Turkey
| | - Tansu Gölcez
- Izmir Katip Celebi University
- Graduate School of Natural and Applied Sciences
- Department of Biomedical Technologies/Master of Science
- Izmir
- Turkey
| | - Ziyşan Buse Yaralı
- Izmir Katip Celebi University
- Graduate School of Natural and Applied Sciences
- Biomedical Test, Calibration
- Application and Research Center
- Izmir
| | - Günnur Onak
- Izmir Katip Celebi University
- Graduate School of Natural and Applied Sciences
- Biomedical Test, Calibration
- Application and Research Center
- Izmir
| | - Ozan Karaman
- Izmir Katip Celebi University
- Faculty of Engineering and Architecture
- Biomedical Engineering
- Izmir
- Turkey
| | - Mustafa Şen
- Izmir Katip Celebi University
- Faculty of Engineering and Architecture
- Biomedical Engineering
- Izmir
- Turkey
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12
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Tan GZ, Zhou Y. Electrospinning of biomimetic fibrous scaffolds for tissue engineering: a review. INT J POLYM MATER PO 2019. [DOI: 10.1080/00914037.2019.1636248] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- George Z. Tan
- Department of Industrial, Manufacturing and Systems Engineering, Texas Tech University, Lubbock, TX, USA
| | - Yingge Zhou
- Department of Industrial, Manufacturing and Systems Engineering, Texas Tech University, Lubbock, TX, USA
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13
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Quan Q, Meng H, Chang B, Hong L, Li R, Liu G, Cheng X, Tang H, Liu P, Sun Y, Peng J, Zhao Q, Wang Y, Lu S. Novel 3-D helix-flexible nerve guide conduits repair nerve defects. Biomaterials 2019; 207:49-60. [DOI: 10.1016/j.biomaterials.2019.03.040] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 01/17/2019] [Accepted: 03/24/2019] [Indexed: 12/25/2022]
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14
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Cavanaugh M, Silantyeva E, Pylypiv Koh G, Malekzadeh E, Lanzinger WD, Willits RK, Becker ML. RGD-Modified Nanofibers Enhance Outcomes in Rats after Sciatic Nerve Injury. J Funct Biomater 2019; 10:jfb10020024. [PMID: 31146396 PMCID: PMC6637389 DOI: 10.3390/jfb10020024] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 05/13/2019] [Accepted: 05/22/2019] [Indexed: 01/23/2023] Open
Abstract
Nerve injuries requiring surgery are a significant problem without good clinical alternatives to the autograft. Tissue engineering strategies are critically needed to provide an alternative. In this study, we utilized aligned nanofibers that were click-modified with the bioactive peptide RGD for rat sciatic nerve repair. Empty conduits or conduits filled with either non-functionalized aligned nanofibers or RGD-functionalized aligned nanofibers were used to repair a 13 mm gap in the rat sciatic nerve of animals for six weeks. The aligned nanofibers encouraged cell infiltration and nerve repair as shown by histological analysis. RGD-functionalized nanofibers reduced muscle atrophy. During the six weeks of recovery, the animals were subjected to motor and sensory tests. Sensory recovery was improved in the RGD-functionalized nanofiber group by week 4, while other groups needed six weeks to show improvement after injury. Thus, the use of functionalized nanofibers provides cues that aid in in vivo nerve repair and should be considered as a future repair strategy.
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Affiliation(s)
- McKay Cavanaugh
- Department of Biomedical Engineering, The University of Akron, Akron, OH 44325-0302, USA.
| | - Elena Silantyeva
- Department of Polymer Science, The University of Akron, Akron, OH 44325, USA.
| | - Galina Pylypiv Koh
- Department of Biomedical Engineering, The University of Akron, Akron, OH 44325-0302, USA.
| | - Elham Malekzadeh
- Department of Biomedical Engineering, The University of Akron, Akron, OH 44325-0302, USA.
| | | | - Rebecca Kuntz Willits
- Department of Biomedical Engineering, The University of Akron, Akron, OH 44325-0302, USA.
| | - Matthew L Becker
- Department of Polymer Science, The University of Akron, Akron, OH 44325, USA.
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15
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Sun AX, Prest TA, Fowler JR, Brick RM, Gloss KM, Li X, DeHart M, Shen H, Yang G, Brown BN, Alexander PG, Tuan RS. Conduits harnessing spatially controlled cell-secreted neurotrophic factors improve peripheral nerve regeneration. Biomaterials 2019; 203:86-95. [DOI: 10.1016/j.biomaterials.2019.01.038] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 12/15/2018] [Accepted: 01/24/2019] [Indexed: 02/07/2023]
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16
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Imaninezhad M, Pemberton K, Xu F, Kalinowski K, Bera R, Zustiak SP. Directed and enhanced neurite outgrowth following exogenous electrical stimulation on carbon nanotube-hydrogel composites. J Neural Eng 2018; 15:056034. [DOI: 10.1088/1741-2552/aad65b] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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17
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Chang W, Shah MB, Lee P, Yu X. Tissue-engineered spiral nerve guidance conduit for peripheral nerve regeneration. Acta Biomater 2018; 73:302-311. [PMID: 29702292 DOI: 10.1016/j.actbio.2018.04.046] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Revised: 04/10/2018] [Accepted: 04/23/2018] [Indexed: 01/09/2023]
Abstract
Recently in peripheral nerve regeneration, preclinical studies have shown that the use of nerve guidance conduits (NGCs) with multiple longitudinally channels and intra-luminal topography enhance the functional outcomes when bridging a nerve gap caused by traumatic injury. These features not only provide guidance cues for regenerating nerve, but also become the essential approaches for developing a novel NGC. In this study, a novel spiral NGC with aligned nanofibers and wrapped with an outer nanofibrous tube was first developed and investigated. Using the common rat sciatic 10-mm nerve defect model, the in vivo study showed that a novel spiral NGC (with and without inner nanofibers) increased the successful rate of nerve regeneration after 6 weeks recovery. Substantial improvements in nerve regeneration were achieved by combining the spiral NGC with inner nanofibers and outer nanofibrous tube, based on the results of walking track analysis, electrophysiology, nerve histological assessment, and gastrocnemius muscle measurement. This demonstrated that the novel spiral NGC with inner aligned nanofibers and wrapped with an outer nanofibrous tube provided a better environment for peripheral nerve regeneration than standard tubular NGCs. Results from this study will benefit for future NGC design to optimize tissue-engineering strategies for peripheral nerve regeneration. STATEMENT OF SIGNIFICANCE We developed a novel spiral nerve guidance conduit (NGC) with coated aligned nanofibers. The spiral structure increases surface area by 4.5 fold relative to a tubular NGC. Furthermore, the aligned nanofibers was coated on the spiral walls, providing cues for guiding neurite extension. Finally, the outside of spiral NGC was wrapped with randomly nanofibers to enhance mechanical strength that can stabilize the spiral NGC. Our nerve histological data have shown that the spiral NGC had 50% more myelinated axons than a tubular structure for nerve regeneration across a 10 mm gap in a rat sciatic nerve. Results from this study can help further optimize tissue engineering strategies for peripheral nerve repair.
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18
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Wieringa PA, Gonçalves de Pinho AR, Micera S, Wezel RJA, Moroni L. Biomimetic Architectures for Peripheral Nerve Repair: A Review of Biofabrication Strategies. Adv Healthc Mater 2018; 7:e1701164. [PMID: 29349931 DOI: 10.1002/adhm.201701164] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2017] [Revised: 11/13/2017] [Indexed: 12/19/2022]
Abstract
Biofabrication techniques have endeavored to improve the regeneration of the peripheral nervous system (PNS), but nothing has surpassed the performance of current clinical practices. However, these current approaches have intrinsic limitations that compromise patient care. The "gold standard" autograft provides the best outcomes but requires suitable donor material, while implantable hollow nerve guide conduits (NGCs) can only repair small nerve defects. This review places emphasis on approaches that create structural cues within a hollow NGC lumen in order to match or exceed the regenerative performance of the autograft. An overview of the PNS and nerve regeneration is provided. This is followed by an assessment of reported devices, divided into three major categories: isotropic hydrogel fillers, acting as unstructured interluminal support for regenerating nerves; fibrous interluminal fillers, presenting neurites with topographical guidance within the lumen; and patterned interluminal scaffolds, providing 3D support for nerve growth via structures that mimic native PNS tissue. Also presented is a critical framework to evaluate the impact of reported outcomes. While a universal and versatile nerve repair strategy remains elusive, outlined here is a roadmap of past, present, and emerging fabrication techniques to inform and motivate new developments in the field of peripheral nerve regeneration.
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Affiliation(s)
- Paul A. Wieringa
- Department of Complex Tissue RegenerationMERLN Institute for Technology‐Inspired Regenerative MedicineMaastricht University Universiteitssingel 40 Maastricht 6229 ER The Netherlands
| | - Ana Rita Gonçalves de Pinho
- Tissue Regeneration DepartmentMIRA InstituteUniversity of Twente Drienerlolaan 5 Enschede 7522 NB The Netherlands
| | - Silvestro Micera
- BioRobotics InstituteScuola Superiore Sant'Anna Viale Rinaldo Piaggio 34 Pontedera 56025 Italy
- Translational Neural Engineering LaboratoryEcole Polytechnique Federale de Lausanne Ch. des Mines 9 Geneva CH‐1202 Switzerland
| | - Richard J. A. Wezel
- BiophysicsDonders Institute for BrainCognition and BehaviourRadboud University Kapittelweg 29 Nijmegen 6525 EN The Netherlands
- Biomedical Signals and SystemsMIRA InstituteUniversity of Twente Drienerlolaan 5 Enschede 7522 NB The Netherlands
| | - Lorenzo Moroni
- Department of Complex Tissue RegenerationMERLN Institute for Technology‐Inspired Regenerative MedicineMaastricht University Universiteitssingel 40 Maastricht 6229 ER The Netherlands
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19
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Wrobel MR, Sundararaghavan HG. Biomaterial Cues to Direct a Pro-regenerative Phenotype in Macrophages and Schwann Cells. Neuroscience 2018; 376:172-187. [DOI: 10.1016/j.neuroscience.2018.02.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Revised: 01/23/2018] [Accepted: 02/09/2018] [Indexed: 12/11/2022]
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20
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Petcu EB, Midha R, McColl E, Popa-Wagner A, Chirila TV, Dalton PD. 3D printing strategies for peripheral nerve regeneration. Biofabrication 2018; 10:032001. [DOI: 10.1088/1758-5090/aaaf50] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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21
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Del Valle J, Santos D, Delgado-Martínez I, de la Oliva N, Giudetti G, Micera S, Navarro X. Segregation of motor and sensory axons regenerating through bicompartmental tubes by combining extracellular matrix components with neurotrophic factors. J Tissue Eng Regen Med 2018; 12:e1991-e2000. [PMID: 29266822 DOI: 10.1002/term.2629] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Revised: 10/30/2017] [Accepted: 12/11/2017] [Indexed: 12/21/2022]
Abstract
Segregation of regenerating motor and sensory axons may be a good strategy to improve selective functionality of regenerative interfaces to provide closed-loop commands. Provided that extracellular matrix components and neurotrophic factors exert guidance effects on different neuronal populations, we assessed in vivo the potential of separating sensory and motor axons regenerating in a bicompartmental Y-type tube, with each branch prefilled with an adequate combination of extracellular matrix and neurotrophic factors. The severed rat sciatic nerve was repaired using a bicompartmental tube filled with a collagen matrix enriched with fibronectin (FN) and brain-derived neurotrophic factor (BDNF) encapsulated in poly-lactic co-glycolic acid microspheres (FN + MP.BDNF) in one compartment to preferentially attract motor axons and collagen enriched with laminin (LM) and nerve growth factor (NGF) and neurotrophin-3 (NT-3) in microspheres (LM + MP.NGF/NT-3) in the other compartment for promoting sensory axons regeneration. Control animals were implanted with the same Y-tube with a collagen matrix with microspheres (MP) containing PBS (Col + MP.PBS). By using retrotracer labelling, we found that LM + MP.NGF/NT-3 did not attract higher number of regenerated sensory axons compared with controls, and no differences were observed in sensory functional recovery. However, FN + MP.BDNF guided a higher number of regenerating motor axons compared with controls, improving also motor recovery. A small proportion of sensory axons with large soma size, likely proprioceptive neurons, was also attracted to the FN + MP.BDNF compartment. These results demonstrate that muscular axonal guidance can be modulated in vivo by the addition of fibronectin and BDNF.
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Affiliation(s)
- Jaume Del Valle
- Institute of Neurosciences and Department of Cell Biology, Physiology, and Immunology, Universitat Autònoma de Barcelona, Bellaterra, Spain.,Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Bellaterra, Spain.,Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC, and BIST, Bellaterra, Spain
| | - Daniel Santos
- Institute of Neurosciences and Department of Cell Biology, Physiology, and Immunology, Universitat Autònoma de Barcelona, Bellaterra, Spain.,Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Bellaterra, Spain
| | - Ignacio Delgado-Martínez
- Institute of Neurosciences and Department of Cell Biology, Physiology, and Immunology, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Natàlia de la Oliva
- Institute of Neurosciences and Department of Cell Biology, Physiology, and Immunology, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Guido Giudetti
- The Biorobotics Institute, Scuola Superiore Sant'Anna, Pontedera, Italy
| | - Silvestro Micera
- The Biorobotics Institute, Scuola Superiore Sant'Anna, Pontedera, Italy.,Translational Neural Engineering Laboratory, Center for Neuroprosthetics and Institute of Bioengineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Xavier Navarro
- Institute of Neurosciences and Department of Cell Biology, Physiology, and Immunology, Universitat Autònoma de Barcelona, Bellaterra, Spain.,Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Bellaterra, Spain
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22
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Kim JI, Kim CS, Park CH. Harnessing Nanotopography of Electrospun Nanofibrous Nerve Guide Conduits (NGCs) for Neural Tissue Engineering. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1078:395-408. [PMID: 30357634 DOI: 10.1007/978-981-13-0950-2_20] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The anatomical recovery of nerve defects with their neurological functions after an injury caused by diseases or accidents is an important clinical issue. The most efficient surgical technique so far to the nerve defects, which are unrepairable by direct end-to-end suture, can be autograft transplantation. The autograft transplantation, however, has disadvantages including multiple rounds of surgery, a shortage of nerve donor, and function loss at the donor site. Tissue-engineered nerve guide conduits (TENGCs) have emerged as a potential alternative to autologous nerve grafts for nerve regeneration and functional recovery. Various TENGCs researches are being carried out to improve characteristics and enhance functionality such as material selection, biomimetic, topography, and enhancement by the biomolecules additions. Among them, the customizable surface nanotopography of aligned fibrous TENGCs foster neural repair by providing a cell-friendly environment, permissiveness, guidance cues, and directional growth of the cells. Fibrous nerve guide conduits (NGCs) made of longitudinally ordered fibers is a promising candidate for nerve tissue engineering.
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Affiliation(s)
- Jeong In Kim
- Department of Bionanosystem Engineering, Graduate School, Chonbuk National University, Jeonju, South Korea
| | - Cheol Sang Kim
- Department of Bionanosystem Engineering, Graduate School, Chonbuk National University, Jeonju, South Korea. .,Division of Mechanical Design Engineering, College of Engineering, Chonbuk National University, Jeonju, South Korea.
| | - Chan Hee Park
- Department of Bionanosystem Engineering, Graduate School, Chonbuk National University, Jeonju, South Korea. .,Division of Mechanical Design Engineering, College of Engineering, Chonbuk National University, Jeonju, South Korea.
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23
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Kamble P, Sadarani B, Majumdar A, Bhullar S. Nanofiber based drug delivery systems for skin: A promising therapeutic approach. J Drug Deliv Sci Technol 2017. [DOI: 10.1016/j.jddst.2017.07.003] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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24
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Hopkins TM, Little KJ, Vennemeyer JJ, Triozzi JL, Turgeon MK, Heilman AM, Minteer D, Marra K, Hom DB, Pixley SK. Short and long gap peripheral nerve repair with magnesium metal filaments. J Biomed Mater Res A 2017; 105:3148-3158. [PMID: 28782170 DOI: 10.1002/jbm.a.36176] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2017] [Revised: 06/28/2017] [Accepted: 08/01/2017] [Indexed: 11/06/2022]
Abstract
A current clinical challenge is to replace autografts for repair of injury gaps in peripheral nerves, which can occur due to trauma or surgical interruption. Biodegradable metallic magnesium filaments, placed inside hollow nerve conduits, could support nerve repair by providing contact guidance support for axonal regeneration. This was tested by repairing sciatic nerves of adult rats with single magnesium filaments placed inside poly(caprolactone) nerve conduits. Controls were empty conduits, conduits containing titanium filaments and/or isografts from donor rats. With a nerve gap of 6 mm and 6 weeks post-repair, magnesium filaments had partially resorbed. Regenerating cells had attached to the filaments and axons were observed in distal stumps in all animals. Axon parameters were improved with magnesium compared to conduits alone or conduits with single titanium filaments. With a longer gap of 15 mm and 16 weeks post-repair, functional parameters were improved with isografts, but not with magnesium filaments or empty conduits. Magnesium filaments were completely resorbed and no evidence of scarring was seen. While axon outgrowth was not improved with the longer gap, histological measures of the tissues were improved with magnesium compared to empty conduits. Therefore, the use of magnesium filaments is promising because they are biocompatible and improve aspects of nerve regeneration. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 105A: 3148-3158, 2017.
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Affiliation(s)
- Tracy M Hopkins
- Department of Pharmacology and Systems Physiology, University of Cincinnati College of Medicine, 231 Albert Sabin Way, Cincinnati, Ohio 45267
| | - Kevin J Little
- Division of Pediatric Orthopaedics, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave, Cincinnati, Ohio 45229
| | - John J Vennemeyer
- Department of Pharmacology and Systems Physiology, University of Cincinnati College of Medicine, 231 Albert Sabin Way, Cincinnati, Ohio 45267
| | - Jefferson L Triozzi
- Student Affairs, University of Cincinnati College of Medicine, 231 Albert Sabin Way, Cincinnati, Ohio 45267
| | - Michael K Turgeon
- Student Affairs, University of Cincinnati College of Medicine, 231 Albert Sabin Way, Cincinnati, Ohio 45267
| | - Alexander M Heilman
- Student Affairs, University of Cincinnati College of Medicine, 231 Albert Sabin Way, Cincinnati, Ohio 45267
| | - D Minteer
- Department of Plastic Surgery, University of Pittsburgh, 3380 Boulevard of the Allies, Suite 138, Pittsburgh, Pennsylvania 15213
| | - K Marra
- Departments of Plastic Surgery and Bioengineering, 1655E BST, University of Pittsburgh, 200 Lothrop St., Pittsburgh, Pennsylvania 15261
| | - David B Hom
- Division of Facial Plastic & Reconstructive Surgery, Department of Otolaryngology-Head and Neck Surgery, University of Cincinnati College of Medicine, 231 Albert Sabin Way, Cincinnati, Ohio 45267
| | - Sarah K Pixley
- Department of Pharmacology and Systems Physiology, University of Cincinnati College of Medicine, 231 Albert Sabin Way, Cincinnati, Ohio 45267
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25
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Morelli S, Piscioneri A, Drioli E, De Bartolo L. Neuronal Differentiation Modulated by Polymeric Membrane Properties. Cells Tissues Organs 2017; 204:164-178. [PMID: 28787740 DOI: 10.1159/000477135] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/28/2017] [Indexed: 01/19/2023] Open
Abstract
In this study, different collagen-blend membranes were successfully constructed by blending collagen with chitosan (CHT) or poly(lactic-co-glycolic acid) (PLGA) to enhance their properties and thus create new biofunctional materials with great potential use for neuronal tissue engineering and regeneration. Collagen blending strongly affected membrane properties in the following ways: (i) it improved the surface hydrophilicity of both pure CHT and PLGA membranes, (ii) it reduced the stiffness of CHT membranes, but (iii) it did not modify the good mechanical properties of PLGA membranes. Then, we investigated the effect of the different collagen concentrations on the neuronal behavior of the membranes developed. Morphological observations, immunocytochemistry, and morphometric measures demonstrated that the membranes developed, especially CHT/Col30, PLGA, and PLGA/Col1, provided suitable microenvironments for neuronal growth owing to their enhanced properties. The most consistent neuronal differentiation was obtained in neurons cultured on PLGA-based membranes, where a well-developed neuronal network was achieved due to their improved mechanical properties. Our findings suggest that tensile strength and elongation at break are key material parameters that have potential influence on both axonal elongation and neuronal structure and organization, which are of fundamental importance for the maintenance of efficient neuronal growth. Hence, our study has provided new insights regarding the effects of membrane mechanical properties on neuronal behavior, and thus it may help to design and improve novel instructive biomaterials for neuronal tissue engineering.
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Affiliation(s)
- Sabrina Morelli
- Institute on Membrane Technology, National Research Council of Italy, ITM-CNR, Rende, Italy
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26
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Stenberg L, Stößel M, Ronchi G, Geuna S, Yin Y, Mommert S, Mårtensson L, Metzen J, Grothe C, Dahlin LB, Haastert-Talini K. Regeneration of long-distance peripheral nerve defects after delayed reconstruction in healthy and diabetic rats is supported by immunomodulatory chitosan nerve guides. BMC Neurosci 2017; 18:53. [PMID: 28720074 PMCID: PMC5516317 DOI: 10.1186/s12868-017-0374-z] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Accepted: 07/10/2017] [Indexed: 12/31/2022] Open
Abstract
Background Delayed reconstruction of transection or laceration injuries of peripheral nerves is inflicted by a reduced regeneration capacity. Diabetic conditions, more frequently encountered in clinical practice, are known to further impair regeneration in peripheral nerves. Chitosan nerve guides (CNGs) have recently been introduced as a new generation of medical devices for immediate peripheral nerve reconstruction. Here, CNGs were used for 45 days delayed reconstruction of critical length 15 mm rat sciatic nerve defects in either healthy Wistar rats or diabetic Goto-Kakizaki rats; the latter resembling type 2 diabetes. In short and long-term investigations, we comprehensively analyzed the performance of one-chambered hollow CNGs (hCNGs) and two-chambered CNGs (CFeCNGs) in which a chitosan film has been longitudinally introduced. Additionally, we investigated in vitro the immunomodulatory effect provided by the chitosan film. Results Both types of nerve guides, i.e. hCNGs and CFeCNGs, enabled moderate morphological and functional nerve regeneration after reconstruction that was delayed for 45 days. These positive findings were detectable in generally healthy as well as in diabetic Goto-Kakizaki rats (for the latter only in short-term studies). The regenerative outcome did not reach the degree as recently demonstrated after immediate reconstruction using hCNGs and CFeCNGs. CFeCNG-treatment, however, enabled tissue regrowth in all animals (hCNGs: only in 80% of animals). CFeCNGs did further support with an increased vascularization of the regenerated tissue and an enhanced regrowth of motor axons. One mechanism by which the CFeCNGs potentially support successful regeneration is an immunomodulatory effect induced by the chitosan film itself. Our in vitro results suggest that the pro-regenerative effect of chitosan is related to the differentiation of chitosan-adherent monocytes into pro-healing M2 macrophages. Conclusions No considerable differences appear for the delayed nerve regeneration process related to healthy and diabetic conditions. Currently available chitosan nerve grafts do not support delayed nerve regeneration to the same extent as they do after immediate nerve reconstruction. The immunomodulatory characteristics of the biomaterial may, however, be crucial for their regeneration supportive effects. Electronic supplementary material The online version of this article (doi:10.1186/s12868-017-0374-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Lena Stenberg
- Department of Translational Medicine - Hand Surgery, Lund University, 20502, Malmö, Sweden
| | - Maria Stößel
- Institute of Neuroanatomy and Cell Biology, Hannover Medical School, 30625, Hannover, Germany.,Center for Systems Neuroscience (ZSN), 30559, Hannover, Germany
| | - Giulia Ronchi
- Department of Clinical and Biological Sciences, and Cavalieri Ottolenghi Neuroscience Institute, University of Turin, 10043, Orbassano, Turin, Italy
| | - Stefano Geuna
- Department of Clinical and Biological Sciences, and Cavalieri Ottolenghi Neuroscience Institute, University of Turin, 10043, Orbassano, Turin, Italy
| | - Yaobin Yin
- Department of Translational Medicine - Hand Surgery, Lund University, 20502, Malmö, Sweden
| | - Susanne Mommert
- Division of Immunodermatology and Allergy Research, Department of Dermatology and Allergy, Hannover Medical School, 30625, Hannover, Germany
| | - Lisa Mårtensson
- Department of Translational Medicine - Hand Surgery, Lund University, 20502, Malmö, Sweden
| | - Jennifer Metzen
- Institute of Neuroanatomy and Cell Biology, Hannover Medical School, 30625, Hannover, Germany
| | - Claudia Grothe
- Institute of Neuroanatomy and Cell Biology, Hannover Medical School, 30625, Hannover, Germany.,Center for Systems Neuroscience (ZSN), 30559, Hannover, Germany
| | - Lars B Dahlin
- Department of Translational Medicine - Hand Surgery, Lund University, 20502, Malmö, Sweden.,Department of Hand Surgery, Skåne University Hospital, 20502, Malmö, Sweden
| | - Kirsten Haastert-Talini
- Institute of Neuroanatomy and Cell Biology, Hannover Medical School, 30625, Hannover, Germany. .,Center for Systems Neuroscience (ZSN), 30559, Hannover, Germany.
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27
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Abstract
Injuries to the peripheral nervous system are major sources of disability and often result in painful neuropathies or the impairment of muscle movement and/or normal sensations. For gaps smaller than 10 mm in rodents, nearly normal functional recovery can be achieved; for longer gaps, however, there are challenges that have remained insurmountable. The current clinical gold standard used to bridge long, nonhealing nerve gaps, the autologous nerve graft (autograft), has several drawbacks. Despite best efforts, engineering an alternative "nerve bridge" for peripheral nerve repair remains elusive; hence, there is a compelling need to design new approaches that match or exceed the performance of autografts across critically sized nerve gaps. Here an immunomodulatory approach to stimulating nerve repair in a nerve-guidance scaffold was used to explore the regenerative effect of reparative monocyte recruitment. Early modulation of the immune environment at the injury site via fractalkine delivery resulted in a dramatic increase in regeneration as evident from histological and electrophysiological analyses. This study suggests that biasing the infiltrating inflammatory/immune cellular milieu after injury toward a proregenerative population creates a permissive environment for repair. This approach is a shift from the current modes of clinical and laboratory methods for nerve repair, which potentially opens an alternative paradigm to stimulate endogenous peripheral nerve repair.
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28
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Hejazi F, Mirzadeh H, Contessi N, Tanzi MC, Faré S. Novel class of collector in electrospinning device for the fabrication of 3D nanofibrous structure for large defect load-bearing tissue engineering application. J Biomed Mater Res A 2017; 105:1535-1548. [DOI: 10.1002/jbm.a.35822] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2016] [Revised: 06/06/2016] [Accepted: 06/28/2016] [Indexed: 12/13/2022]
Affiliation(s)
- Fatemeh Hejazi
- Department of Polymer Engineering and Color Technology; Amirkabir University of Technology (Tehran Polytechnic); 424 Hafez Avenue Tehran Iran
- Department of Chemistry; Materials and Chemical Engineering ‘‘G. Natta’’; Politecnico Di Milano, P.Zza Leonardo Da Vinci 32 Milan 20133 Italy
| | - Hamid Mirzadeh
- Department of Polymer Engineering and Color Technology; Amirkabir University of Technology (Tehran Polytechnic); 424 Hafez Avenue Tehran Iran
| | - Nicola Contessi
- Department of Chemistry; Materials and Chemical Engineering ‘‘G. Natta’’; Politecnico Di Milano, P.Zza Leonardo Da Vinci 32 Milan 20133 Italy
| | - Maria Cristina Tanzi
- Department of Chemistry; Materials and Chemical Engineering ‘‘G. Natta’’; Politecnico Di Milano, P.Zza Leonardo Da Vinci 32 Milan 20133 Italy
| | - Silvia Faré
- Department of Chemistry; Materials and Chemical Engineering ‘‘G. Natta’’; Politecnico Di Milano, P.Zza Leonardo Da Vinci 32 Milan 20133 Italy
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29
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Santos D, Wieringa P, Moroni L, Navarro X, Valle JD. PEOT/PBT Guides Enhance Nerve Regeneration in Long Gap Defects. Adv Healthc Mater 2017; 6. [PMID: 27973708 DOI: 10.1002/adhm.201600298] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Revised: 11/07/2016] [Indexed: 12/21/2022]
Abstract
Development of new nerve guides is required for replacing autologous nerve grafts for the repair of long gap defects after nerve injury. A nerve guide comprised only of electrospun fibers able to bridge a critical (15 mm) nerve gap in a rat animal model is reported for the first time. The nerve conduits are made of poly(ethylene oxide terephthalate) and poly(butylene terephthalate) (PEOT/PBT), a biocompatible copolymer composed of alternating amorphous, hydrophilic poly(ethylene oxide terephthalate), and crystalline, hydrophobic poly(butylene terephthalate) segments. These guides show suitable mechanical properties, high porosity, and fibers aligned in the longitudinal axis of the guide. In vitro studies show that both neurites and Schwann cells exhibit growth alignment with PA fibers. In vivo studies reveal that, after rat sciatic nerve transection and repair with PEOT/PBT guides, axons grow occupying a larger area compared to silicone tubes. Moreover, after repair of limiting (10 mm) and critical (15 mm) nerve gaps, PEOT/PBT guides significantly increase the percentage of regenerated nerves, the number of regenerated myelinated axons, and improve motor, sensory, and autonomic reinnervation in both gaps. This nerve conduit design combines the properties of PEOT/PBT with electrospun structure, demonstrating that nerve regeneration through long gaps can be achieved through the design of instructive biomaterial constructs.
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Affiliation(s)
- Daniel Santos
- Institute of Neurosciences; Department of Cell Biology; Physiology and Immunology; Universitat Autònoma de Barcelona, and CIBERNED; 08193 Bellaterra Spain
| | - Paul Wieringa
- Department of Complex Tissue Regeneration; MERLN Institute; Maastricht University; 6229 ER Maastricht The Netherlands
| | - Lorenzo Moroni
- Department of Complex Tissue Regeneration; MERLN Institute; Maastricht University; 6229 ER Maastricht The Netherlands
| | - Xavier Navarro
- Institute of Neurosciences; Department of Cell Biology; Physiology and Immunology; Universitat Autònoma de Barcelona, and CIBERNED; 08193 Bellaterra Spain
| | - Jaume Del Valle
- Institute of Neurosciences; Department of Cell Biology; Physiology and Immunology; Universitat Autònoma de Barcelona, and CIBERNED; 08193 Bellaterra Spain
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30
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Sánchez M, Anitua E, Delgado D, Sanchez P, Prado R, Orive G, Padilla S. Platelet-rich plasma, a source of autologous growth factors and biomimetic scaffold for peripheral nerve regeneration. Expert Opin Biol Ther 2016; 17:197-212. [DOI: 10.1080/14712598.2017.1259409] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Mikel Sánchez
- Arthroscopic Surgery Unit, Hospital Vithas San José, Vitoria-Gasteiz, Spain
| | - Eduardo Anitua
- BTI Biotechnology Institute, Vitoria, Spain
- Eduardo Anitua Foundation, Vitoria, Spain
| | - Diego Delgado
- Arthroscopic Surgery Unit Research, Hospital Vithas San José, Vitoria-Gasteiz, Spain
| | - Peio Sanchez
- Arthroscopic Surgery Unit Research, Hospital Vithas San José, Vitoria-Gasteiz, Spain
| | | | - Gorka Orive
- BTI Biotechnology Institute, Vitoria, Spain
- Eduardo Anitua Foundation, Vitoria, Spain
- Lab of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, University of The Basque Country (UPV/EHU), Vitoria-Gasteiz, Spain
- Centro de Investigación Biomédica en Red, Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid, Spain
| | - Sabino Padilla
- BTI Biotechnology Institute, Vitoria, Spain
- Eduardo Anitua Foundation, Vitoria, Spain
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31
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Advances in peripheral nervous system regenerative therapeutic strategies: A biomaterials approach. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 65:425-32. [DOI: 10.1016/j.msec.2016.04.048] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2015] [Revised: 02/20/2016] [Accepted: 04/14/2016] [Indexed: 01/02/2023]
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32
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Bhutto MA, Zhang J, Sun B, El-Hamshary H, Al-Deyab SS, Mo X. Development of poly (L-lactide-co-caprolactone) multichannel nerve conduit with aligned electrospun nanofibers for Schwann cell proliferation. INT J POLYM MATER PO 2016. [DOI: 10.1080/00914037.2015.1099104] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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33
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Hossain R, Kim B, Pankratz R, Ajam A, Park S, Biswal SL, Choi Y. Handcrafted multilayer PDMS microchannel scaffolds for peripheral nerve regeneration. Biomed Microdevices 2015; 17:109. [DOI: 10.1007/s10544-015-0012-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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34
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Meyer C, Stenberg L, Gonzalez-Perez F, Wrobel S, Ronchi G, Udina E, Suganuma S, Geuna S, Navarro X, Dahlin LB, Grothe C, Haastert-Talini K. Chitosan-film enhanced chitosan nerve guides for long-distance regeneration of peripheral nerves. Biomaterials 2015; 76:33-51. [PMID: 26517563 DOI: 10.1016/j.biomaterials.2015.10.040] [Citation(s) in RCA: 124] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Revised: 10/13/2015] [Accepted: 10/18/2015] [Indexed: 01/15/2023]
Abstract
Biosynthetic nerve grafts are developed in order to complement or replace autologous nerve grafts for peripheral nerve reconstruction. Artificial nerve guides currently approved for clinical use are not widely applied in reconstructive surgery as they still have limitations especially when it comes to critical distance repair. Here we report a comprehensive analysis of fine-tuned chitosan nerve guides (CNGs) enhanced by introduction of a longitudinal chitosan film to reconstruct critical length 15 mm sciatic nerve defects in adult healthy Wistar or diabetic Goto-Kakizaki rats. Short and long term investigations demonstrated that the CNGs enhanced by the guiding structure of the introduced chitosan film significantly improved functional and morphological results of nerve regeneration in comparison to simple hollow CNGs. Importantly, this was detectable both in healthy and in diabetic rats (short term) and the regeneration outcome almost reached the outcome after autologous nerve grafting (long term). Hollow CNGs provide properties likely leading to a wider clinical acceptance than other artificial nerve guides and their performance can be increased by simple introduction of a chitosan film with the same advantageous properties. Therefore, the chitosan film enhanced CNGs represent a new generation medical device for peripheral nerve reconstruction.
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Affiliation(s)
- Cora Meyer
- Institute of Neuroanatomy, Hannover Medical School, Hannover, Germany and Center for Systems Neuroscience (ZSN), Hannover, Germany
| | - Lena Stenberg
- Department of Translational Medicine - Hand Surgery, Lund University, Skåne University Hospital, Malmö, Sweden
| | - Francisco Gonzalez-Perez
- Department of Cell Biology, Physiology, and Immunology, Institute of Neurosciences, Universitat Autonoma de Barcelona and CIBERNED, Bellaterra, Spain
| | - Sandra Wrobel
- Institute of Neuroanatomy, Hannover Medical School, Hannover, Germany and Center for Systems Neuroscience (ZSN), Hannover, Germany
| | - Giulia Ronchi
- Department of Clinical and Biological Sciences, and Cavalieri Ottolenghi Neuroscience Institute, University of Turin, Turin, Italy
| | - Esther Udina
- Department of Cell Biology, Physiology, and Immunology, Institute of Neurosciences, Universitat Autonoma de Barcelona and CIBERNED, Bellaterra, Spain
| | - Seigo Suganuma
- Department of Orthopaedic Surgery, Kanazawa University Hospital, Kanazawa, Japan
| | - Stefano Geuna
- Department of Clinical and Biological Sciences, and Cavalieri Ottolenghi Neuroscience Institute, University of Turin, Turin, Italy
| | - Xavier Navarro
- Department of Cell Biology, Physiology, and Immunology, Institute of Neurosciences, Universitat Autonoma de Barcelona and CIBERNED, Bellaterra, Spain
| | - Lars B Dahlin
- Department of Translational Medicine - Hand Surgery, Lund University, Skåne University Hospital, Malmö, Sweden
| | - Claudia Grothe
- Institute of Neuroanatomy, Hannover Medical School, Hannover, Germany and Center for Systems Neuroscience (ZSN), Hannover, Germany.
| | - Kirsten Haastert-Talini
- Institute of Neuroanatomy, Hannover Medical School, Hannover, Germany and Center for Systems Neuroscience (ZSN), Hannover, Germany
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Jiang J, Carlson MA, Teusink MJ, Wang H, MacEwan MR, Xie J. Expanding Two-Dimensional Electrospun Nanofiber Membranes in the Third Dimension By a Modified Gas-Foaming Technique. ACS Biomater Sci Eng 2015; 1:991-1001. [DOI: 10.1021/acsbiomaterials.5b00238] [Citation(s) in RCA: 95] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
| | | | | | | | - Matthew R. MacEwan
- Department
of Neurosurgery, Washington University School of Medicine, Saint Louis, Missouri 63110, United States
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Hodde D, Gerardo-Nava J, Wöhlk V, Weinandy S, Jockenhövel S, Kriebel A, Altinova H, Steinbusch HWM, Möller M, Weis J, Mey J, Brook GA. Characterisation of cell-substrate interactions between Schwann cells and three-dimensional fibrin hydrogels containing orientated nanofibre topographical cues. Eur J Neurosci 2015. [DOI: 10.1111/ejn.13026] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Dorothee Hodde
- Institute of Neuropathology; Uniklinik RWTH Aachen University; Pauwelsstraße 30 52074 Aachen Germany
- Jülich-Aachen Research Alliance - Translational Brain Medicine (JARA Brain); Jülich Germany
| | - José Gerardo-Nava
- Institute of Neuropathology; Uniklinik RWTH Aachen University; Pauwelsstraße 30 52074 Aachen Germany
- Jülich-Aachen Research Alliance - Translational Brain Medicine (JARA Brain); Jülich Germany
- EURON - European Graduate School of Neuroscience; Maastricht The Netherlands
| | - Vanessa Wöhlk
- Institute of Neuropathology; Uniklinik RWTH Aachen University; Pauwelsstraße 30 52074 Aachen Germany
| | - Stefan Weinandy
- Department of Tissue Engineering and Textile Implants; AME - Helmholtz Institute for Biomedical Engineering and Uniklinik RWTH Aachen University; Aachen Germany
| | - Stefan Jockenhövel
- Department of Tissue Engineering and Textile Implants; AME - Helmholtz Institute for Biomedical Engineering and Uniklinik RWTH Aachen University; Aachen Germany
| | - Andreas Kriebel
- Institute of Biology II; RWTH Aachen University; Aachen Germany
| | - Haktan Altinova
- Institute of Neuropathology; Uniklinik RWTH Aachen University; Pauwelsstraße 30 52074 Aachen Germany
- Jülich-Aachen Research Alliance - Translational Brain Medicine (JARA Brain); Jülich Germany
- Department of Neurosurgery; Evangelic Hospital Bethel; Bielefeld Germany
| | - Harry W. M. Steinbusch
- Department of Psychiatry and Neuropsychology; Division of Neuroscience; Faculty of Health, Medicine and Life Sciences; Maastricht University; Maastricht The Netherlands
| | - Martin Möller
- DWI-Leibniz Institute for Interactive Materials and Institute of Technical and Macromolecular Chemistry; RWTH Aachen University; Aachen Germany
| | - Joachim Weis
- Institute of Neuropathology; Uniklinik RWTH Aachen University; Pauwelsstraße 30 52074 Aachen Germany
- Jülich-Aachen Research Alliance - Translational Brain Medicine (JARA Brain); Jülich Germany
| | - Jörg Mey
- EURON - European Graduate School of Neuroscience; Maastricht The Netherlands
- Institute of Biology II; RWTH Aachen University; Aachen Germany
- Department of Psychiatry and Neuropsychology; Division of Neuroscience; Faculty of Health, Medicine and Life Sciences; Maastricht University; Maastricht The Netherlands
- Laboratorio de Regeneración Nerviosa; Hospital Nacional de Parapléjicos; Toledo Spain
| | - Gary A. Brook
- Institute of Neuropathology; Uniklinik RWTH Aachen University; Pauwelsstraße 30 52074 Aachen Germany
- Jülich-Aachen Research Alliance - Translational Brain Medicine (JARA Brain); Jülich Germany
- EURON - European Graduate School of Neuroscience; Maastricht The Netherlands
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Neural tissue regeneration in experimental brain injury model with channeled scaffolds of acrylate copolymers. Neurosci Lett 2015; 598:96-101. [PMID: 25980992 DOI: 10.1016/j.neulet.2015.05.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Accepted: 05/12/2015] [Indexed: 12/18/2022]
Abstract
The objective of the present study was to evaluate the biocompatibility and cell hosting ability of a copolymer scaffold based on ethyl acrylate (EA) and hydroxyl ethyl acrylate (HEA) in vivo after an experimental brain injury. Wistar rats were subjected to cryogenic traumatic brain injury. We evaluated the tissue response to the implanted materials after 8 weeks. The materials were implanted devoid of cells; they provoked a minimal scar response by the host tissue and permitted the invasion of neurons and glia inside them. We also found new blood vessels surrounding and inside the implant. Thus, the copolymer scaffold proves to offer a suitable environment producing a cellular network potentially useful in brain repair after brain injury.
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Imani S, Zagari Z, Rezaei Zarchi S, Jorjani M, Nasri S. Functional Recovery of Carbon Nanotube/Nafion Nanocomposite in Rat Model of Spinal Cord Injury. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2015; 44:144-9. [DOI: 10.3109/21691401.2015.1024844] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Silk-tropoelastin protein films for nerve guidance. Acta Biomater 2015; 14:1-10. [PMID: 25481743 DOI: 10.1016/j.actbio.2014.11.045] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2014] [Revised: 11/16/2014] [Accepted: 11/24/2014] [Indexed: 12/24/2022]
Abstract
Peripheral nerve regeneration may be enhanced through the use of biodegradable thin film biomaterials as highly tuned inner nerve conduit liners. Dorsal root ganglion neuron and Schwann cell responses were studied on protein films comprising silk fibroin blended with recombinant human tropoelastin protein. Tropoelastin significantly improved neurite extension and enhanced Schwann cell process length and cell area, while the silk provided a robust biomaterial template. Silk-tropoelastin blends afforded a 2.4-fold increase in neurite extension, when compared to silk films coated with poly-d-lysine. When patterned by drying on grooved polydimethylsiloxane (3.5 μm groove width, 0.5 μm groove depth), these protein blends induced both neurite and Schwann cell process alignment. Neurons were functional as assessed using patch-clamping, and displayed action potentials similar to those cultured on poly(lysine)-coated glass. Taken together, silk-tropoelastin films offer useful biomaterial interfacial platforms for nerve cell control, which can be considered for neurite guidance, disease models for neuropathies and surgical peripheral nerve repairs.
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Gore RK, Choi Y, Bellamkonda R, English A. Functional recordings from awake, behaving rodents through a microchannel based regenerative neural interface. J Neural Eng 2015; 12:016017. [PMID: 25605627 DOI: 10.1088/1741-2560/12/1/016017] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
OBJECTIVE Neural interface technologies could provide controlling connections between the nervous system and external technologies, such as limb prosthetics. The recording of efferent, motor potentials is a critical requirement for a peripheral neural interface, as these signals represent the user-generated neural output intended to drive external devices. Our objective was to evaluate structural and functional neural regeneration through a microchannel neural interface and to characterize potentials recorded from electrodes placed within the microchannels in awake and behaving animals. APPROACH Female rats were implanted with muscle EMG electrodes and, following unilateral sciatic nerve transection, the cut nerve was repaired either across a microchannel neural interface or with end-to-end surgical repair. During a 13 week recovery period, direct muscle responses to nerve stimulation proximal to the transection were monitored weekly. In two rats repaired with the neural interface, four wire electrodes were embedded in the microchannels and recordings were obtained within microchannels during proximal stimulation experiments and treadmill locomotion. MAIN RESULTS In these proof-of-principle experiments, we found that axons from cut nerves were capable of functional reinnervation of distal muscle targets, whether regenerating through a microchannel device or after direct end-to-end repair. Discrete stimulation-evoked and volitional potentials were recorded within interface microchannels in a small group of awake and behaving animals and their firing patterns correlated directly with intramuscular recordings during locomotion. Of 38 potentials extracted, 19 were identified as motor axons reinnervating tibialis anterior or soleus muscles using spike triggered averaging. SIGNIFICANCE These results are evidence for motor axon regeneration through microchannels and are the first report of in vivo recordings from regenerated motor axons within microchannels in a small group of awake and behaving animals. These unique findings provide preliminary evidence that efferent, volitional motor potentials can be recorded from the microchannel-based peripheral neural interface; a critical requirement for any neural interface intended to facilitate direct neural control of external technologies.
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Affiliation(s)
- Russell K Gore
- Department of Neurology, Emory University School of Medicine, 550 Peachtree Street NE, 9th Floor MOT, Atlanta, GA 30308, USA. Wallace H Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory School of Medicine, 1760 Haygood Drive NE, Atlanta, GA 30322, USA
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41
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Characterization of Olfactory Ensheathing Glial Cells Cultured on Polyurethane/Polylactide Electrospun Nonwovens. INT J POLYM SCI 2015. [DOI: 10.1155/2015/908328] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The aim of this research was to evaluate novel biomaterials for neural regeneration. The investigated materials were composed of polyurethane (PU) and polylactide (PLDL) blended at three different w/w ratios, that is, 5/5, 6/4, and 8/2 of PU/PLDL. Ultrathin fibrous scaffolds were prepared using electrospinning. The scaffolds were investigated for their applicability for nerve regeneration by culturing rat olfactory ensheathing glial cells. Cells were cultured on the materials for seven days, during which cellular morphology, phenotype, and metabolic activity were analysed. SEM analysis of the fabricated fibrous scaffolds showed fibers of a diameter mainly lower than 600 μm with unimportant volume of protrusions situated along the fibers, with nonsignificant differences between all analysed materials. Cells cultured on the materials showed differences in their morphology and metabolic activity, depending on the blend composition. The most proper morphology, with numerous p75+and GFAP+cells present, was observed in the sample 6/4, whereas the highest metabolic activity was measured in the sample 5/5. However, none of the investigated samples showed cytotoxicity or negatively influenced cellular morphology. Therefore, the novel electrospun fibrous materials may be considered for regenerative medicine applications, and especially when contacting with highly sensitive nervous cells.
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42
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Srinivasan A, Tahilramani M, Bentley JT, Gore RK, Millard DC, Mukhatyar VJ, Joseph A, Haque AS, Stanley GB, English AW, Bellamkonda RV. Microchannel-based regenerative scaffold for chronic peripheral nerve interfacing in amputees. Biomaterials 2014; 41:151-65. [PMID: 25522974 DOI: 10.1016/j.biomaterials.2014.11.035] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Revised: 10/25/2014] [Accepted: 11/07/2014] [Indexed: 12/17/2022]
Abstract
Neurally controlled prosthetics that cosmetically and functionally mimic amputated limbs remain a clinical need because state of the art neural prosthetics only provide a fraction of a natural limb's functionality. Here, we report on the fabrication and capability of polydimethylsiloxane (PDMS) and epoxy-based SU-8 photoresist microchannel scaffolds to serve as viable constructs for peripheral nerve interfacing through in vitro and in vivo studies in a sciatic nerve amputee model where the nerve lacks distal reinnervation targets. These studies showed microchannels with 100 μm × 100 μm cross-sectional areas support and direct the regeneration/migration of axons, Schwann cells, and fibroblasts through the microchannels with space available for future maturation of the axons. Investigation of the nerve in the distal segment, past the scaffold, showed a high degree of organization, adoption of the microchannel architecture forming 'microchannel fascicles', reformation of endoneurial tubes and axon myelination, and a lack of aberrant and unorganized growth that might be characteristic of neuroma formation. Separate chronic terminal in vivo electrophysiology studies utilizing the microchannel scaffolds with permanently integrated microwire electrodes were conducted to evaluate interfacing capabilities. In all devices a variety of spontaneous, sensory evoked and electrically evoked single and multi-unit action potentials were recorded after five months of implantation. Together, these findings suggest that microchannel scaffolds are well suited for chronic implantation and peripheral nerve interfacing to promote organized nerve regeneration that lends itself well to stable interfaces. Thus this study establishes the basis for the advanced fabrication of large-electrode count, wireless microchannel devices that are an important step towards highly functional, bi-directional peripheral nerve interfaces.
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Affiliation(s)
- Akhil Srinivasan
- Wallace H Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA 30332, USA
| | - Mayank Tahilramani
- Wallace H Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA 30332, USA
| | - John T Bentley
- Wallace H Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA 30332, USA
| | - Russell K Gore
- Wallace H Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA 30332, USA; Department of Neurology, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Daniel C Millard
- Wallace H Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA 30332, USA
| | - Vivek J Mukhatyar
- Wallace H Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA 30332, USA
| | - Anish Joseph
- Wallace H Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA 30332, USA
| | - Adel S Haque
- Wallace H Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA 30332, USA
| | - Garrett B Stanley
- Wallace H Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA 30332, USA
| | - Arthur W English
- Department of Cell Biology, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Ravi V Bellamkonda
- Wallace H Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA 30332, USA.
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Vennemeyer JJ, Hopkins T, Hershcovitch M, Little KD, Hagen MC, Minteer D, Hom DB, Marra K, Pixley SK. Initial observations on using magnesium metal in peripheral nerve repair. J Biomater Appl 2014; 29:1145-54. [PMID: 25281648 DOI: 10.1177/0885328214553135] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Biodegradable magnesium metal filaments placed inside biodegradable nerve conduits might provide the physical guidance support needed to improve the rate and extent of regeneration of peripheral nerves across injury gaps. In this study, we examined basic issues of magnesium metal resorption and biocompatibility by repairing sub-critical size gap injuries (6 mm) in one sciatic nerve of 24 adult male Lewis rats. Separated nerve stumps were connected with poly(caprolactone) nerve conduits, with and without magnesium filaments (0.25 mm diameter, 10 mm length), with two different conduit filler substances (saline and keratin hydrogel). At 6 weeks after implantation, magnesium degradation was examined by micro-computed tomography and histological analyses. Magnesium degradation was significantly greater when the conduits were filled with an acidic keratin hydrogel than with saline (p < 0.05). But magnesium filaments in some animals remained intact for 6 weeks. Using histological and immunocytochemical analyses, good biocompatibility of the magnesium implants was observed at 6 weeks, as shown by good development of regenerating nerve mini-fascicles and only mild inflammation in tissues even after complete degradation of the magnesium. Nerve regeneration was not interrupted by complete magnesium degradation. An initial functional evaluation, determination of size recovery of the gastrocnemius muscle, showed a slight improvement due to magnesium with the saline but not the keratin filler, compared with respective control conduits without magnesium. These results suggest that magnesium filament implants have the potential to improve repair of injured peripheral nerve defects in this rodent model.
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Affiliation(s)
- J J Vennemeyer
- Department of Biomedical Engineering, University of Cincinnati, OH, USA
| | - T Hopkins
- Department of Molecular and Cellular Physiology, University of Cincinnati, OH, USA
| | - M Hershcovitch
- Department of Otolaryngology-Head & Neck Surgery, University of Cincinnati, OH, USA
| | - K D Little
- Department of Orthopaedic Surgery, University of Cincinnati, OH, USA
| | - M C Hagen
- Department of Pathology and Laboratory Medicine, University of Cincinnati, OH, USA
| | - D Minteer
- Department of Bioengineering, University of Pittsburgh, PA, USA
| | - D B Hom
- Division of Facial Plastic and Reconstructive Surgery, Department of Otolaryngology-Head & Neck Surgery and Dermatology, University of Cincinnati, OH, USA
| | - K Marra
- Department of Bioengineering and Department of Plastic Surgery, University of Pittsburgh, PA, USA
| | - S K Pixley
- Department of Molecular and Cellular Physiology, University of Cincinnati, OH, USA
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Liu H, Wen W, Hu M, Bi W, Chen L, Liu S, Chen P, Tan X. Chitosan conduits combined with nerve growth factor microspheres repair facial nerve defects. Neural Regen Res 2014; 8:3139-47. [PMID: 25206635 PMCID: PMC4158708 DOI: 10.3969/j.issn.1673-5374.2013.33.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2013] [Accepted: 06/10/2013] [Indexed: 01/09/2023] Open
Abstract
Microspheres containing nerve growth factor for sustained release were prepared by a compound method, and implanted into chitosan conduits to repair 10-mm defects on the right buccal branches of the facial nerve in rabbits. In addition, chitosan conduits combined with nerve growth factor or normal saline, as well as autologous nerve, were used as controls. At 90 days post-surgery, the muscular atrophy on the right upper lip was more evident in the nerve growth factor and normal sa-line groups than in the nerve growth factor-microspheres and autologous nerve groups. physiological analysis revealed that the nerve conduction velocity and amplitude were significantly higher in the nerve growth factor-microspheres and autologous nerve groups than in the nerve growth factor and normal saline groups. Moreover, histological observation illustrated that the di-ameter, number, alignment and myelin sheath thickness of myelinated nerves derived from rabbits were higher in the nerve growth factor-microspheres and autologous nerve groups than in the nerve growth factor and normal saline groups. These findings indicate that chitosan nerve conduits bined with microspheres for sustained release of nerve growth factor can significantly improve facial nerve defect repair in rabbits.
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Affiliation(s)
- Huawei Liu
- Institute of Stomatology, Chinese PLA General Hospital, Beijing 100853, China
| | - Weisheng Wen
- Institute of Stomatology, Chinese PLA General Hospital, Beijing 100853, China
| | - Min Hu
- Institute of Stomatology, Chinese PLA General Hospital, Beijing 100853, China
| | - Wenting Bi
- Department of Stomatology, Second Hospital of Beijing Chaoyang District, Beijing 100026, China
| | - Lijie Chen
- Department of Stomatology, First Sanatorium of Qingdao, Jinan Military Area Command of Chinese PLA, Qingdao 266071, Shandong Province, China
| | - Sanxia Liu
- Institute of Stomatology, Chinese PLA General Hospital, Beijing 100853, China
| | - Peng Chen
- Institute of Stomatology, Chinese PLA General Hospital, Beijing 100853, China
| | - Xinying Tan
- Institute of Stomatology, Chinese PLA General Hospital, Beijing 100853, China
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Carriel V, Alaminos M, Garzón I, Campos A, Cornelissen M. Tissue engineering of the peripheral nervous system. Expert Rev Neurother 2014; 14:301-18. [DOI: 10.1586/14737175.2014.887444] [Citation(s) in RCA: 83] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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46
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Mukhatyar V, Pai B, Clements I, Srinivasan A, Huber R, Mehta A, Mukhopadaya S, Rudra S, Patel G, Karumbaiah L, Bellamkonda R. Molecular sequelae of topographically guided peripheral nerve repair. Ann Biomed Eng 2013; 42:1436-55. [PMID: 24356852 DOI: 10.1007/s10439-013-0960-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2013] [Accepted: 12/07/2013] [Indexed: 12/17/2022]
Abstract
Peripheral nerve injuries cause severe disability with decreased nerve function often followed by neuropathic pain that impacts the quality of life. Even though use of autografts is the current gold standard, nerve conduits fabricated from electrospun nanofibers have shown promise to successfully bridge critical length nerve gaps. However, in depth analysis of the role of topographical cues in the context of spatio-temporal progression of the regenerative sequence has not been elucidated. Here, we explored the influence of topographical cues (aligned, random, and smooth films) on the regenerative sequence and potential to successfully support nerve regeneration in critical size gaps. A number of key findings emerged at the cellular, cytokine and molecular levels from the study. Higher quantities of IL-1α and TNF-α were detected in aligned fiber based scaffolds. Differential gene expression of BDNF, NGFR, ErbB2, and ErbB3 were observed suggesting a role for these genes in influencing Schwann cell migration, myelination, etc. that impact the regeneration in various topographies. Fibrin matrix stabilization and arrest of nerve-innervated muscle atrophy was also evident. Taken together, our data shed light on the cascade of events that favor regeneration in aligned topography and should stimulate research to further refine the strategy of nerve regeneration using topographical cues.
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Affiliation(s)
- Vivek Mukhatyar
- Neurological Biomaterials and Cancer Therapeutics Laboratory, Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology/Emory University School of Medicine, UA Whitaker Building, 313 Ferst Drive, Atlanta, GA, 30332-0535, USA
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Ezra M, Bushman J, Shreiber D, Schachner M, Kohn J. Enhanced femoral nerve regeneration after tubulization with a tyrosine-derived polycarbonate terpolymer: effects of protein adsorption and independence of conduit porosity. Tissue Eng Part A 2013; 20:518-28. [PMID: 24011026 DOI: 10.1089/ten.tea.2013.0092] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Following complete nerve transection, entubulation of the nerve stumps helps guide axons to reconnect distally. In this study, a biodegradable and noncytotoxic tyrosine-derived polycarbonate terpolymer composed of 89.5 mol% desaminotyrosyl tyrosine ethyl ester (DTE), 10 mol% desaminotyrosyl tyrosine (DT), and 0.5 mol% poly(ethylene glycol) (PEG, molecular weight [Mw]=1 kDa) [designated as E10-0.5(1K)] was used to fabricate conduits for peripheral nerve regeneration. These conduits were evaluated against commercially available nonporous polyethylene (PE) tubes. The two materials are characterized in vitro for differences in surface properties, and the conduits are then evaluated in vivo in a critical-sized nerve defect in the mouse femoral nerve model. Conduits were fabricated from E10-0.5(1K) in both porous [P-E10-0.5(1K)] and nonporous [NP-E10-0.5(1K)] configurations. The results illustrate that adsorption of laminin, fibronectin, and collagen type I was enhanced on E10-0.5(1K) compared to PE. In addition, in vivo the E10-0.5(1K) conduits improved functional recovery over PE conduits, producing regenerated nerves with a fivefold increase in the number of axons, and an eightfold increase in the percentage of myelinated axons. These increases were observed for both P-E10-0.5(1K) and NP-E10-0.5(1K) after 15 weeks. When conduits were removed at 7 or 14 days following implantation, an increase in Schwann cell proteins and fibrin matrix formation was observed in E10-0.5(1K) conduits over PE conduits. These results indicate that E10-0.5(1K) is a pro-regenerative material for peripheral nerves and that the porosity of P-E10-0.5(1K) conduits was inconsequential in this model of nerve injury.
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Affiliation(s)
- Mindy Ezra
- 1 New Jersey Center for Biomaterials, Rutgers, The State University of New Jersey , Piscataway, New Jersey
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48
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Daly WT, Knight AM, Wang H, de Boer R, Giusti G, Dadsetan M, Spinner RJ, Yaszemski MJ, Windebank AJ. Comparison and characterization of multiple biomaterial conduits for peripheral nerve repair. Biomaterials 2013; 34:8630-9. [DOI: 10.1016/j.biomaterials.2013.07.086] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2013] [Accepted: 07/23/2013] [Indexed: 12/26/2022]
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Kriebel A, Rumman M, Scheld M, Hodde D, Brook G, Mey J. Three-dimensional configuration of orientated fibers as guidance structures for cell migration and axonal growth. J Biomed Mater Res B Appl Biomater 2013; 102:356-65. [DOI: 10.1002/jbm.b.33014] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Revised: 07/11/2013] [Accepted: 07/29/2013] [Indexed: 11/12/2022]
Affiliation(s)
- Andreas Kriebel
- Institut für Biologie II; RWTH Aachen Germany
- EURON Graduate School of Neuroscience; Maastricht University; Netherlands
| | | | | | - Dorothee Hodde
- Institut für Neuropathologie; Universitätsklinikum Aachen; Germany
- Jülich-Aachen Research Alliance - Translational Brain Medicine (JARA Brain); Germany
| | - Gary Brook
- EURON Graduate School of Neuroscience; Maastricht University; Netherlands
- Institut für Neuropathologie; Universitätsklinikum Aachen; Germany
- Jülich-Aachen Research Alliance - Translational Brain Medicine (JARA Brain); Germany
| | - Jörg Mey
- Institut für Biologie II; RWTH Aachen Germany
- EURON Graduate School of Neuroscience; Maastricht University; Netherlands
- Laboratorio de Regeneración Nerviosa; Hospital Nacional de Parapléjicos; Toledo Spain
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Cao X, Zhao L, Song ZB, Qin JQ. The possible influence of varying diameter of aligned electrospun fibers on Schwann cells maturation in culture. Med Hypotheses 2013; 81:887-8. [PMID: 24035687 DOI: 10.1016/j.mehy.2013.07.038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2013] [Revised: 07/17/2013] [Accepted: 07/22/2013] [Indexed: 10/26/2022]
Abstract
The development of Schwann cells, the principal glial cell in the peripheral nervous system, occurs through a series of transitional embryonic and postnatal phases, which are tightly regulated by a number of axonal signals. During the axon ensheathment and myelin growth, the diameter of the axon play an important role in the maturation of Schwann cells. Because of electrospun fibers similar to protein fibers within the native extracellular matrix, the scaffolds are being developed as neural tissue engineering scaffolds. Until now, the correlation between varying diameter of aligned electrospun fibers and Schwann cells maturation has not been investigated. We hypothesize that the different diameter of aligned electrospun fibers may influence the maturation of Schwann cells and may help improve the outcome of cell-based approaches to cure demyelinated lesions or peripheral nerve regeneration.
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Affiliation(s)
- Xin Cao
- Department of Anatomy, Southern Medical University, Guangzhou 510665, China; Department of Neurology, Affiliated Xiao Lan People Hospital, Southern Medical University, zhongshan, 528415, China
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