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Parker BJ, Rhodes DI, O'Brien CM, Rodda AE, Cameron NR. Nerve guidance conduit development for primary treatment of peripheral nerve transection injuries: A commercial perspective. Acta Biomater 2021; 135:64-86. [PMID: 34492374 DOI: 10.1016/j.actbio.2021.08.052] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 08/19/2021] [Accepted: 08/30/2021] [Indexed: 12/17/2022]
Abstract
Commercial nerve guidance conduits (NGCs) for repair of peripheral nerve discontinuities are of little use in gaps larger than 30 mm, and for smaller gaps they often fail to compete with the autografts that they are designed to replace. While recent research to develop new technologies for use in NGCs has produced many advanced designs with seemingly positive functional outcomes in animal models, these advances have not been translated into viable clinical products. While there have been many detailed reviews of the technologies available for creating NGCs, none of these have focussed on the requirements of the commercialisation process which are vital to ensure the translation of a technology from bench to clinic. Consideration of the factors essential for commercial viability, including regulatory clearance, reimbursement processes, manufacturability and scale up, and quality management early in the design process is vital in giving new technologies the best chance at achieving real-world impact. Here we have attempted to summarise the major components to consider during the development of emerging NGC technologies as a guide for those looking to develop new technology in this domain. We also examine a selection of the latest academic developments from the viewpoint of clinical translation, and discuss areas where we believe further work would be most likely to bring new NGC technologies to the clinic. STATEMENT OF SIGNIFICANCE: NGCs for peripheral nerve repairs represent an adaptable foundation with potential to incorporate modifications to improve nerve regeneration outcomes. In this review we outline the regulatory processes that functionally distinct NGCs may need to address and explore new modifications and the complications that may need to be addressed during the translation process from bench to clinic.
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Affiliation(s)
- Bradyn J Parker
- Department of Materials Science and Engineering, Monash University, 22 Alliance Lane, Clayton, Victoria 3800, Australia; Commonwealth Scientific and Industrial Research Organisation (CSIRO) Manufacturing, Research Way, Clayton, Victoria 3168, Australia
| | - David I Rhodes
- Department of Materials Science and Engineering, Monash University, 22 Alliance Lane, Clayton, Victoria 3800, Australia; ReNerve Pty. Ltd., Brunswick East 3057, Australia
| | - Carmel M O'Brien
- Commonwealth Scientific and Industrial Research Organisation (CSIRO) Manufacturing, Research Way, Clayton, Victoria 3168, Australia; Australian Regenerative Medicine Institute, Science, Technology, Research and innovation Precinct (STRIP), Monash University, Wellington Road, Clayton, Victoria 3800, Australia
| | - Andrew E Rodda
- Department of Materials Science and Engineering, Monash University, 22 Alliance Lane, Clayton, Victoria 3800, Australia
| | - Neil R Cameron
- Department of Materials Science and Engineering, Monash University, 22 Alliance Lane, Clayton, Victoria 3800, Australia; School of Engineering, University of Warwick, Coventry CV4 7AL, United Kingdom.
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Controllable Degradation of Poly (trimethylene carbonate) via Self-blending with Different Molecular Weights. Polym Degrad Stab 2021. [DOI: 10.1016/j.polymdegradstab.2021.109596] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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3
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Rybak A, Malinowski L, Adamus-Wlodarczyk A, Ulanski P. Thermally Conductive Shape Memory Polymer Composites Filled with Boron Nitride for Heat Management in Electrical Insulation. Polymers (Basel) 2021; 13:polym13132191. [PMID: 34209395 PMCID: PMC8272128 DOI: 10.3390/polym13132191] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 06/27/2021] [Accepted: 06/29/2021] [Indexed: 11/16/2022] Open
Abstract
The evaluation of a possible application of functional shrinkable materials in thermally conductive electrical insulation elements was investigated. The effectiveness of an electron beam and gamma radiation on the crosslinking of a selected high density polyethylene grade was analyzed, both qualitatively and quantitatively. The crosslinked polymer composites filled with ceramic particles were successfully fabricated and tested. On the basis of the performed investigation, it was concluded that the selected filler, namely a boron nitride powder, is suitable for the preparation of the crosslinked polymer composites with enhanced thermal conductivity. The shape memory effect was fully observed in the crosslinked samples with a recovery factor reaching nearly 99%. There was no significant influence of the crosslinking, stretching, and recovery of the polymer composite during shape memory phenomenon on the value of thermal conductivity. The proposed boron nitride filled polyethylene composite subjected to crosslinking is a promising candidate for fabrication of thermally shrinkable material with enhanced heat dissipation functionality for application as electrically insulating components.
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Affiliation(s)
- Andrzej Rybak
- ABB Corporate Technology Center, Starowislna 13A, 31-038 Krakow, Poland;
- Correspondence: ; Tel.: +48-22-223-8488
| | - Lukasz Malinowski
- ABB Corporate Technology Center, Starowislna 13A, 31-038 Krakow, Poland;
| | - Agnieszka Adamus-Wlodarczyk
- Faculty of Chemistry, Institute of Applied Radiation Chemistry, Lodz University of Technology, Wroblewskiego 15, 93-590 Lodz, Poland; (A.A.-W.); (P.U.)
| | - Piotr Ulanski
- Faculty of Chemistry, Institute of Applied Radiation Chemistry, Lodz University of Technology, Wroblewskiego 15, 93-590 Lodz, Poland; (A.A.-W.); (P.U.)
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Khalaj Amnieh S, Mosaddegh P, Mashayekhi M, Kharaziha M. Biodegradation evaluation of poly (lactic acid) for stent application: Role of mechanical tension and temperature. J Appl Polym Sci 2020. [DOI: 10.1002/app.50389] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Sasan Khalaj Amnieh
- Department of Mechanical Engineering Isfahan University of Technology Isfahan Iran
| | - Peiman Mosaddegh
- Department of Mechanical Engineering Isfahan University of Technology Isfahan Iran
| | - Mohammad Mashayekhi
- Department of Mechanical Engineering Isfahan University of Technology Isfahan Iran
| | - Mahshid Kharaziha
- Department of Materials Engineering Isfahan University of Technology Isfahan Iran
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Guo Z, Kofink S, Chen H, Liang J, Grijpma DW, Poot AA. Synthesis and characterization of rGO-graft-poly(trimethylene carbonate) for nerve regeneration conduits. Biomed Mater 2019; 14:034101. [DOI: 10.1088/1748-605x/ab0269] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Domingues RCC, Pereira CC, Borges CP. Effect of stereoisomerism of poly(lactic acid) during neural guide conduit membrane synthesis. J Appl Polym Sci 2018. [DOI: 10.1002/app.46190] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Rui Carlos Castro Domingues
- COPPE/Chemical Engineering Program; Federal University of Rio de Janeiro, P.O. Box 68502; Rio de Janeiro 21945-970 Brazil
| | - Cristina Cardoso Pereira
- COPPE/Chemical Engineering Program; Federal University of Rio de Janeiro, P.O. Box 68502; Rio de Janeiro 21945-970 Brazil
| | - Cristiano Piacsek Borges
- COPPE/Chemical Engineering Program; Federal University of Rio de Janeiro, P.O. Box 68502; Rio de Janeiro 21945-970 Brazil
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Pestana FM, Domingues RCC, Oliveira JT, Durço DFPA, Goulart CO, Mendonça HR, Dos Santos ACR, de Campos NT, da Silva BT, Pereira CC, Borges CP, Martinez AMB. Comparison of morphological and functional outcomes of mouse sciatic nerve repair with three biodegradable polymer conduits containing poly(lactic acid). Neural Regen Res 2018; 13:1811-1819. [PMID: 30136697 PMCID: PMC6128044 DOI: 10.4103/1673-5374.238712] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Poly(lactic acid) (PLA)-containing nerve guidance conduits (NGCs) are currently being investigated for nerve repair as an alternative to autograft, which leads to permanent functional impairment in the territory innervated by the removed nerve. Combination of polymers modifies the physical properties of the conduits, altering their nerve-guidance properties. Conduits made from PLA-only or combined with other polymers have been used successfully for nerve repair, but their efficiency has not been compared. We compared the morphological and functional outcomes of peripheral nerve repair by using NGCs made of poly(lactic acid) and combined or not with polycaprolactone (PLA/PCL) or polyvinylpyrrolidone (PLA/PVP). To assess the functional recovery, we employed a mechanical hyperalgesia analysis, sciatic functional index (SFI), and electroneuromyography. The mechanical hyperalgesia analysis showed that the PLA group improved more rapidly than the PLA/PVP and PLA/PCL groups; similarly, in the electroneuromyography assay, the PLA group exhibited higher amplitude than the PLA/PCL and PLA/PVP groups. However, the SFI improvement rates did not differ among the groups. Morphologically, the PLA group showed more vascularization, while the nerve fiber regeneration did not differ among the groups. In conclusion, the PLA-only conduits were superior to the other NGCs tested for nerve repair.
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Affiliation(s)
- Fernanda Marques Pestana
- Pós Graduação em Ciências Morfológicas, Instituto de Ciências Biomédicas-UFRJ; Laboratório de Neurodegeneração e Reparo - Faculdade de Medicina - HUCFF-UFRJ, Rio de Janeiro, RJ, Brazil
| | | | - Júlia Teixeira Oliveira
- Anatomia Patológica - Faculdade de Medicina - HUCFF -UFRJ; Laboratório de Neurodegeneração e Reparo - Faculdade de Medicina - HUCFF-UFRJ, Rio de Janeiro, RJ, Brazil
| | - Daniela F P A Durço
- Anatomia Patológica - Faculdade de Medicina - HUCFF -UFRJ; Laboratório de Neurodegeneração e Reparo - Faculdade de Medicina - HUCFF-UFRJ, Rio de Janeiro, RJ, Brazil
| | - Camila Oliveira Goulart
- Anatomia Patológica - Faculdade de Medicina - HUCFF -UFRJ; Laboratório de Neurodegeneração e Reparo - Faculdade de Medicina - HUCFF-UFRJ, Rio de Janeiro, RJ, Brazil
| | - Henrique Rocha Mendonça
- Anatomia Patológica - Faculdade de Medicina - HUCFF -UFRJ; Laboratório de Neurodegeneração e Reparo - Faculdade de Medicina - HUCFF-UFRJ, Rio de Janeiro, RJ; Polo Universitário de Macaé, Laboratório Integrado de Produtos Bioativos e Biociências, Macaé, UFRJ, Brazil
| | - Anne Caroline Rodrigues Dos Santos
- Anatomia Patológica - Faculdade de Medicina - HUCFF -UFRJ; Laboratório de Neurodegeneração e Reparo - Faculdade de Medicina - HUCFF-UFRJ, Rio de Janeiro, RJ, Brazil
| | - Natália Tavares de Campos
- Anatomia Patológica - Faculdade de Medicina - HUCFF -UFRJ; Laboratório de Neurodegeneração e Reparo - Faculdade de Medicina - HUCFF-UFRJ, Rio de Janeiro, RJ, Brazil
| | - Beatriz Theodoro da Silva
- Anatomia Patológica - Faculdade de Medicina - HUCFF -UFRJ; Laboratório de Neurodegeneração e Reparo - Faculdade de Medicina - HUCFF-UFRJ, Rio de Janeiro, RJ, Brazil
| | | | | | - Ana Maria Blanco Martinez
- Pós Graduação em Ciências Morfológicas, Instituto de Ciências Biomédicas-UFRJ; Anatomia Patológica - Faculdade de Medicina - HUCFF -UFRJ; Laboratório de Neurodegeneração e Reparo - Faculdade de Medicina - HUCFF-UFRJ, Rio de Janeiro, RJ, Brazil
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Domingues RCC, Pereira CC, Borges CP. Morphological control and properties of poly(lactic acid) hollow fibers for biomedical applications. J Appl Polym Sci 2017. [DOI: 10.1002/app.45494] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Rui Carlos Castro Domingues
- Chemical Engineering Program, Alberto Luiz Coimbra Institute for Graduate Studies and Research in Engineering (COPPE); Federal University of Rio de Janeiro; P.O. Box 68502, Rio de Janeiro 21945-970 Brazil
| | - Cristina Cardoso Pereira
- Chemical Engineering Program, Alberto Luiz Coimbra Institute for Graduate Studies and Research in Engineering (COPPE); Federal University of Rio de Janeiro; P.O. Box 68502, Rio de Janeiro 21945-970 Brazil
| | - Cristiano Piacsek Borges
- Chemical Engineering Program, Alberto Luiz Coimbra Institute for Graduate Studies and Research in Engineering (COPPE); Federal University of Rio de Janeiro; P.O. Box 68502, Rio de Janeiro 21945-970 Brazil
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Mechanical properties and permeability of porous chitosan–poly(p-dioxanone)/silk fibroin conduits used for peripheral nerve repair. J Mech Behav Biomed Mater 2015; 50:192-205. [DOI: 10.1016/j.jmbbm.2015.06.016] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2015] [Revised: 06/14/2015] [Accepted: 06/15/2015] [Indexed: 12/11/2022]
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10
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Wan Y, Zhang J, Luo Y, Zhou T, Wu H. Preparation and degradation of chitosan-poly(p-dioxanone)/silk fibroin porous conduits. Polym Degrad Stab 2015. [DOI: 10.1016/j.polymdegradstab.2015.05.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Yuan Y, Jin X, Fan Z, Li S, Lu Z. In vivo degradation of copolymers prepared from L-lactide, 1,3-trimethylene carbonate and glycolide as coronary stent materials. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2015; 26:139. [PMID: 25716020 DOI: 10.1007/s10856-015-5384-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Accepted: 09/12/2014] [Indexed: 06/04/2023]
Abstract
A series of high molecular weight polymers were prepared by ring opening polymerization of L-lactide (L-LA), 1,3-trimethylene carbonate (TMC) and glycolide using stannous octoate as catalyst. The resulting polymers were characterized by gel permeation chromatography, (1)H nuclear magnetic resonance, differential scanning calorimeter and tensile tests. All the polymers present high molecular weights. Compared with PLLA and PTLA copolymers, the terpolymers exhibit interesting properties such as improved toughness and lowered crystallinity with only slightly reduced mechanical strength. In vivo degradation was performed by subcutaneous implantation in rats to evaluate the potential of the copolymers as bioresorbable coronary stent material. The results show that all the polymers conserved to a large extent their mechanical properties during the first 90 days, except the strain at break which exhibited a strong decrease. Meanwhile, significant molecular weight decrease and weight loss are detected in the case of terpolymers. Therefore, the PTLGA terpolymers present a good potential for the development of totally bioresorbable coronary stents.
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Affiliation(s)
- Yuan Yuan
- Department of Materials Science, Fudan University, 220 Handan Road, Shanghai, 200433, People's Republic of China
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Li H, Chang J, Qin Y, Wu Y, Yuan M, Zhang Y. Poly(lactide-co-trimethylene carbonate) and polylactide/polytrimethylene carbonate blown films. Int J Mol Sci 2014; 15:2608-21. [PMID: 24534806 PMCID: PMC3958871 DOI: 10.3390/ijms15022608] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Revised: 01/24/2014] [Accepted: 02/08/2014] [Indexed: 11/30/2022] Open
Abstract
In this work, poly(lactide-co-trimethylene carbonate) and polylactide/polytrimethylene carbonate films are prepared using a film blowing method. The process parameters, including temperature and screw speed, are studied, and the structures and properties of the P(LA-TMC) and PLA/PTMC films are investigated. The scanning electron microscope (SEM) images show that upon improving the content of TMC and PTMC, the lamellar structures of the films are obviously changed. With increasing TMC monomer or PTMC contents, the elongation at the break is improved, and the maximum is up to 525%. The water vapor permeability (WVP) results demonstrate that the WVP of the PLA/PTMC film increased with the increase in the PTMC content, whereas the WVP of the P(LA-TMC) film decreased. Thermogravimetric (TG) measurements reveal that the decomposition temperatures of the P(LA-TMC) and PLA/PTMC films decrease with increases in the TMC and PTMC contents, respectively, but the processing temperature is significantly lower than the initial decomposition temperature. P(LA-TMC) or PLA/PTMC film can extend the shelf life of apples, for instance, like commercial LDPE film used in fruit packaging in supermarkets.
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Affiliation(s)
- Hongli Li
- Engineering Research Center of Biopolymer Functional Materials of Yunnan, Yunnan University of Nationalities, 134, Yi Er Yi Avenue, Kunming 650031, Yunnan, China.
| | - Jiangping Chang
- Engineering Research Center of Biopolymer Functional Materials of Yunnan, Yunnan University of Nationalities, 134, Yi Er Yi Avenue, Kunming 650031, Yunnan, China.
| | - Yuyue Qin
- Institute of Chemical Engineering, Kunming University of Science and Technology, Kunming 650550, Yunnan, China.
| | - Yan Wu
- Institute of Chemical Engineering, Kunming University of Science and Technology, Kunming 650550, Yunnan, China.
| | - Minglong Yuan
- Engineering Research Center of Biopolymer Functional Materials of Yunnan, Yunnan University of Nationalities, 134, Yi Er Yi Avenue, Kunming 650031, Yunnan, China.
| | - Yingjie Zhang
- Institute of Chemical Engineering, Kunming University of Science and Technology, Kunming 650550, Yunnan, China.
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Wan Y, Huang J, Zhang J, Yin D, Zheng Z, Liao C, Sun S. Investigation of mechanical properties and degradability of multi-channel chitosan–polycaprolactone/collagen conduits. Polym Degrad Stab 2013. [DOI: 10.1016/j.polymdegradstab.2012.10.020] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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