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Rahman M, Mahady Dip T, Padhye R, Houshyar S. Review on electrically conductive smart nerve guide conduit for peripheral nerve regeneration. J Biomed Mater Res A 2023; 111:1916-1950. [PMID: 37555548 DOI: 10.1002/jbm.a.37595] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 01/29/2023] [Accepted: 07/26/2023] [Indexed: 08/10/2023]
Abstract
At present, peripheral nerve injuries (PNIs) are one of the leading causes of substantial impairment around the globe. Complete recovery of nerve function after an injury is challenging. Currently, autologous nerve grafts are being used as a treatment; however, this has several downsides, for example, donor site morbidity, shortage of donor sites, loss of sensation, inflammation, and neuroma development. The most promising alternative is the development of a nerve guide conduit (NGC) to direct the restoration and renewal of neuronal axons from the proximal to the distal end to facilitate nerve regeneration and maximize sensory and functional recovery. Alternatively, the response of nerve cells to electrical stimulation (ES) has a substantial regenerative effect. The incorporation of electrically conductive biomaterials in the fabrication of smart NGCs facilitates the function of ES throughout the active proliferation state. This article overviews the potency of the various categories of electroactive smart biomaterials, including conductive and piezoelectric nanomaterials, piezoelectric polymers, and organic conductive polymers that researchers have employed latterly to fabricate smart NGCs and their potentiality in future clinical application. It also summarizes a comprehensive analysis of the recent research and advancements in the application of ES in the field of NGC.
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Affiliation(s)
- Mustafijur Rahman
- Center for Materials Innovation and Future Fashion (CMIFF), School of Fashion and Textiles, RMIT University, Brunswick, Australia
- Department of Dyes and Chemical Engineering, Bangladesh University of Textiles, Dhaka, Bangladesh
| | - Tanvir Mahady Dip
- Department of Materials, University of Manchester, Manchester, UK
- Department of Yarn Engineering, Bangladesh University of Textiles, Dhaka, Bangladesh
| | - Rajiv Padhye
- Center for Materials Innovation and Future Fashion (CMIFF), School of Fashion and Textiles, RMIT University, Brunswick, Australia
| | - Shadi Houshyar
- School of Engineering, RMIT University, Melbourne, Victoria, Australia
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2
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Taylor CS, Barnes J, Prasad Koduri M, Haq S, Gregory DA, Roy I, D'Sa RA, Curran J, Haycock JW. Aminosilane Functionalized Aligned Fiber PCL Scaffolds for Peripheral Nerve Repair. Macromol Biosci 2023; 23:e2300226. [PMID: 37364159 DOI: 10.1002/mabi.202300226] [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: 05/20/2023] [Revised: 06/13/2023] [Indexed: 06/28/2023]
Abstract
Silane modification is a simple and cost-effective tool to modify existing biomaterials for tissue engineering applications. Aminosilane layer deposition has previously been shown to control NG108-15 neuronal cell and primary Schwann cell adhesion and differentiation by controlling deposition of ─NH2 groups at the submicron scale across the entirety of a surface by varying silane chain length. This is the first study toreport depositing 11-aminoundecyltriethoxysilane (CL11) onto aligned Polycaprolactone (PCL) scaffolds for peripheral nerve regeneration. Fibers are manufactured via electrospinning and characterized using water contact angle measurements, atomic force microscopy (AFM), and X-ray photoelectron spectroscopy (XPS). Confirmed modified fibers are investigated using in vitro cell culture of NG108-15 neuronal cells and primary Schwann cells to determine cell viability, cell differentiation, and phenotype. CL11-modified fibers significantly support NG108-15 neuronal cell and Schwann cell viability. NG108-15 neuronal cell differentiation maintains Schwann cell phenotype compared to unmodified PCL fiber scaffolds. 3D ex vivo culture of Dorsal root ganglion explants (DRGs) confirms further Schwann cell migration and longer neurite outgrowth from DRG explants cultured on CL11 fiber scaffolds compared to unmodified scaffolds. Thus, a reproducible and cost-effective tool is reported to modify biomaterials with functional amine groups that can significantly improve nerve guidance devices and enhance nerve regeneration.
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Affiliation(s)
- Caroline S Taylor
- Department of Materials Science & Engineering, Kroto Research Institute, Broad Lane, Sheffield, S3 7HQ, UK
| | - Joseph Barnes
- Department of Mechanical, Materials and Aerospace, School of Engineering, University of Liverpool, Harrison Hughes Building, Liverpool, L69 3GH, UK
| | - Manohar Prasad Koduri
- Department of Mechanical, Materials and Aerospace, School of Engineering, University of Liverpool, Harrison Hughes Building, Liverpool, L69 3GH, UK
| | - Shamsal Haq
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool, L69 7ZD, UK
| | - David A Gregory
- Department of Materials Science & Engineering, Kroto Research Institute, Broad Lane, Sheffield, S3 7HQ, UK
| | - Ipsita Roy
- Department of Materials Science & Engineering, Kroto Research Institute, Broad Lane, Sheffield, S3 7HQ, UK
| | - Raechelle A D'Sa
- Department of Mechanical, Materials and Aerospace, School of Engineering, University of Liverpool, Harrison Hughes Building, Liverpool, L69 3GH, UK
| | - Judith Curran
- Department of Mechanical, Materials and Aerospace, School of Engineering, University of Liverpool, Harrison Hughes Building, Liverpool, L69 3GH, UK
| | - John W Haycock
- Department of Materials Science & Engineering, Kroto Research Institute, Broad Lane, Sheffield, S3 7HQ, UK
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Taylor CS, Behbehani M, Glen A, Basnett P, Gregory DA, Lukasiewicz BB, Nigmatullin R, Claeyssens F, Roy I, Haycock JW. Aligned Polyhydroxyalkanoate Blend Electrospun Fibers as Intraluminal Guidance Scaffolds for Peripheral Nerve Repair. ACS Biomater Sci Eng 2023; 9:1472-1485. [PMID: 36848250 PMCID: PMC10015431 DOI: 10.1021/acsbiomaterials.2c00964] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Accepted: 02/02/2023] [Indexed: 03/01/2023]
Abstract
The use of nerve guidance conduits (NGCs) to treat peripheral nerve injuries is a favorable approach to the current "gold standard" of autografting. However, as simple hollow tubes, they lack specific topographical and mechanical guidance cues present in nerve grafts and therefore are not suitable for treating large gap injuries (30-50 mm). The incorporation of intraluminal guidance scaffolds, such as aligned fibers, has been shown to increase neuronal cell neurite outgrowth and Schwann cell migration distances. A novel blend of PHAs, P(3HO)/P(3HB) (50:50), was investigated for its potential as an intraluminal aligned fiber guidance scaffold. Aligned fibers of 5 and 8 μm diameter were manufactured by electrospinning and characterized using SEM. Fibers were investigated for their effect on neuronal cell differentiation, Schwann cell phenotype, and cell viability in vitro. Overall, P(3HO)/P(3HB) (50:50) fibers supported higher neuronal and Schwann cell adhesion compared to PCL fibers. The 5 μm PHA blend fibers also supported significantly higher DRG neurite outgrowth and Schwann cell migration distance using a 3D ex vivo nerve injury model.
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Affiliation(s)
- Caroline S. Taylor
- Department
of Materials Science & and Engineering, The University of Sheffield, Sheffield S3 7HQ, United Kingdom
| | - Mehri Behbehani
- The
Electrospinning Company, Unit 5, Zephyr Building, Eighth St., Harwell Campus,
Harwell, Didcot OX11 0RL, United Kingdom
| | - Adam Glen
- Department
of Materials Science & and Engineering, The University of Sheffield, Sheffield S3 7HQ, United Kingdom
| | - Pooja Basnett
- School
of Life Sciences, College of Liberal Arts and Sciences, University of Westminster, London W1B 2HW, United Kingdom
| | - David A. Gregory
- Department
of Materials Science & and Engineering, The University of Sheffield, Sheffield S3 7HQ, United Kingdom
| | - Barbara B. Lukasiewicz
- School
of Life Sciences, College of Liberal Arts and Sciences, University of Westminster, London W1B 2HW, United Kingdom
| | - Rinat Nigmatullin
- School
of Life Sciences, College of Liberal Arts and Sciences, University of Westminster, London W1B 2HW, United Kingdom
| | - Frederik Claeyssens
- Department
of Materials Science & and Engineering, The University of Sheffield, Sheffield S3 7HQ, United Kingdom
| | - Ipsita Roy
- Department
of Materials Science & and Engineering, The University of Sheffield, Sheffield S3 7HQ, United Kingdom
| | - John W. Haycock
- Department
of Materials Science & and Engineering, The University of Sheffield, Sheffield S3 7HQ, United Kingdom
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De Stefano P, Federici AS, Draghi L. In Vitro Models for the Development of Peripheral Nerve Conduits, Part I: Design of a Fibrin Gel-Based Non-Contact Test. Polymers (Basel) 2021; 13:3573. [PMID: 34685331 PMCID: PMC8540146 DOI: 10.3390/polym13203573] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 10/01/2021] [Accepted: 10/06/2021] [Indexed: 02/07/2023] Open
Abstract
Current clinical strategies to repair peripheral nerve injuries draw on different approaches depending on the extent of lost tissue. Nerve guidance conduits (NGCs) are considered to be a promising, off-the-shelf alternative to autografts when modest gaps need to be repaired. Unfortunately, to date, the implantation of an NGC prevents the sacrifice of a healthy nerve at the price of suboptimal clinical performance. Despite the significant number of materials and fabrication strategies proposed, an ideal combination has not been yet identified. Validation and comparison of NGCs ultimately requires in vivo animal testing due to the lack of alternative models, but in the spirit of the 3R principles, a reliable in vitro model for preliminary screening is highly desirable. Nevertheless, more traditional in vitro tests, and direct cell seeding on the material in particular, are not representative of the actual regeneration scenario. Thus, we have designed a very simple set-up in the attempt to appreciate the relevant features of NGCs through in vitro testing, and we have verified its applicability using electrospun NGCs. To this aim, neural cells were encapsulated in a loose fibrin gel and enclosed within the NGC membrane. Different thicknesses and porosity values of two popular polymers (namely gelatin and polycaprolactone) were compared. Results indicate that, with specific implementation, the system might represent a useful tool to characterize crucial NGC design aspects.
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Affiliation(s)
- Paola De Stefano
- Department of Chemistry, Materials and Chemical Engineering “G. Natta”, Politecnico di Milano, Via Mancinelli 7, 20131 Milan, Italy; (A.S.F.); (L.D.)
| | - Angelica Silvia Federici
- Department of Chemistry, Materials and Chemical Engineering “G. Natta”, Politecnico di Milano, Via Mancinelli 7, 20131 Milan, Italy; (A.S.F.); (L.D.)
- Local Unit Politecnico di Milano, INSTM—National Interuniversity Consortium of Materials Science and Technology, P.zza Leonardo da Vinci 32, 20133 Milan, Italy
| | - Lorenza Draghi
- Department of Chemistry, Materials and Chemical Engineering “G. Natta”, Politecnico di Milano, Via Mancinelli 7, 20131 Milan, Italy; (A.S.F.); (L.D.)
- Local Unit Politecnico di Milano, INSTM—National Interuniversity Consortium of Materials Science and Technology, P.zza Leonardo da Vinci 32, 20133 Milan, Italy
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Aldskogius H, Kozlova EN. Dorsal Root Injury-A Model for Exploring Pathophysiology and Therapeutic Strategies in Spinal Cord Injury. Cells 2021; 10:2185. [PMID: 34571835 PMCID: PMC8470715 DOI: 10.3390/cells10092185] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 08/19/2021] [Accepted: 08/20/2021] [Indexed: 12/12/2022] Open
Abstract
Unraveling the cellular and molecular mechanisms of spinal cord injury is fundamental for our possibility to develop successful therapeutic approaches. These approaches need to address the issues of the emergence of a non-permissive environment for axonal growth in the spinal cord, in combination with a failure of injured neurons to mount an effective regeneration program. Experimental in vivo models are of critical importance for exploring the potential clinical relevance of mechanistic findings and therapeutic innovations. However, the highly complex organization of the spinal cord, comprising multiple types of neurons, which form local neural networks, as well as short and long-ranging ascending or descending pathways, complicates detailed dissection of mechanistic processes, as well as identification/verification of therapeutic targets. Inducing different types of dorsal root injury at specific proximo-distal locations provide opportunities to distinguish key components underlying spinal cord regeneration failure. Crushing or cutting the dorsal root allows detailed analysis of the regeneration program of the sensory neurons, as well as of the glial response at the dorsal root-spinal cord interface without direct trauma to the spinal cord. At the same time, a lesion at this interface creates a localized injury of the spinal cord itself, but with an initial neuronal injury affecting only the axons of dorsal root ganglion neurons, and still a glial cell response closely resembling the one seen after direct spinal cord injury. In this review, we provide examples of previous research on dorsal root injury models and how these models can help future exploration of mechanisms and potential therapies for spinal cord injury repair.
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Affiliation(s)
- Håkan Aldskogius
- Laboratory of Regenertive Neurobiology, Biomedical Center, Department of Neuroscience, Uppsala University, 75124 Uppsala, Sweden;
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Huang Y, Wu W, Liu H, Chen Y, Li B, Gou Z, Li X, Gou M. 3D printing of functional nerve guide conduits. BURNS & TRAUMA 2021; 9:tkab011. [PMID: 34212061 PMCID: PMC8240533 DOI: 10.1093/burnst/tkab011] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Nerve guide conduits (NGCs), as alternatives to nerve autografts and allografts, have been widely explored as an advanced tool for the treatment of peripheral nerve injury. However, the repairing efficiency of NGCs still needs significant improvements. Functional NGCs that provide a more favorable microenvironment for promoting axonal elongation and myelination are of great importance. In recent years, 3D printing technologies have been widely applied in the fabrication of customized and complex constructs, exhibiting great potential for tissue engineering applications, especially for the construction of functional NGCs. In this review, we introduce the 3D printing technologies for manufacturing functional NGCs, including inkjet printing, extrusion printing, stereolithography-based printing and indirect printing. Further, we summarize the current methods and strategies for constructing functional NGCs, such as designing special conduit architectures, using appropriate materials and co-printing with different biological cues. Finally, the challenges and prospects for construction of functional NGCs are also presented.
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Affiliation(s)
- Yulan Huang
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Wenbi Wu
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Haofan Liu
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Yuwen Chen
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Bo Li
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Zhiyuan Gou
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Xun Li
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, 610041, China.,Department of Ophthalmology, West China Hospital, Sichuan University, Chengdu, China
| | - Maling Gou
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, 610041, China
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Taylor CS, Chen R, D' Sa R, Hunt JA, Curran JM, Haycock JW. Cost effective optimised synthetic surface modification strategies for enhanced control of neuronal cell differentiation and supporting neuronal and Schwann cell viability. J Biomed Mater Res B Appl Biomater 2021; 109:1713-1723. [PMID: 33749114 DOI: 10.1002/jbm.b.34829] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 02/06/2021] [Accepted: 02/23/2021] [Indexed: 11/11/2022]
Abstract
Enriching a biomaterial surface with specific chemical groups has previously been considered for producing surfaces that influence cell response. Silane layer deposition has previously been shown to control mesenchymal stem cell adhesion and differentiation. However, it has not been used to investigate neuronal or Schwann cell responses in vitro to date. We report on the deposition of aminosilane groups for peripheral neurons and Schwann cells studying two chain lengths: (a) 3-aminopropyl triethoxysilane (short chain-SC) and (b) 11-aminoundecyltriethoxysilane (long chain-LC) by coating glass substrates. Surfaces were characterised by water contact angle, AFM and XPS. LC-NH2 was produced reproducibly as a homogenous surface with controlled nanotopography. Primary neuron and NG108-15 neuronal cell differentiation and primary Schwann cell responses were investigated in vitro by S100β, p75, and GFAP antigen expression. Both amine silane surface supported neuronal and Schwann cell growth; however, neuronal differentiation was greater on LC aminosilanes versus SC. Thus, we report that silane surfaces with an optimal chain length may have potential in peripheral nerve repair for the modification and improvement of nerve guidance devices.
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Affiliation(s)
- Caroline S Taylor
- Department of Materials Science and Engineering, University of Sheffield, Sheffield, UK
| | - Rui Chen
- Department of Mechanical, Materials and Aerospace, University of Liverpool, Liverpool, UK
| | - Raechelle D' Sa
- Department of Mechanical, Materials and Aerospace, University of Liverpool, Liverpool, UK
| | - John A Hunt
- Medical Technologies and Advanced Materials, Nottingham Trent University, Nottingham, UK
| | - Judith M Curran
- Department of Mechanical, Materials and Aerospace, University of Liverpool, Liverpool, UK
| | - John W Haycock
- Department of Materials Science and Engineering, University of Sheffield, Sheffield, UK
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Sandoval‐Castellanos AM, Claeyssens F, Haycock JW. Biomimetic surface delivery of NGF and BDNF to enhance neurite outgrowth. Biotechnol Bioeng 2020; 117:3124-3135. [DOI: 10.1002/bit.27466] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 06/11/2020] [Accepted: 06/18/2020] [Indexed: 11/11/2022]
Affiliation(s)
| | - Frederik Claeyssens
- Department of Materials Science and Engineering The University of Sheffield Sheffield United Kingdom
| | - John W. Haycock
- Department of Materials Science and Engineering The University of Sheffield Sheffield United Kingdom
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Lizarraga‐Valderrama LR, Taylor CS, Claeyssens F, Haycock JW, Knowles JC, Roy I. Unidirectional neuronal cell growth and differentiation on aligned polyhydroxyalkanoate blend microfibres with varying diameters. J Tissue Eng Regen Med 2019; 13:1581-1594. [PMID: 31185133 PMCID: PMC6790610 DOI: 10.1002/term.2911] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 05/08/2019] [Accepted: 05/10/2019] [Indexed: 01/26/2023]
Abstract
Polyhydroxyalkanoates (PHAs) are a family of prokaryotic-derived biodegradable and biocompatible natural polymers known to exhibit neuroregenerative properties. In this work, poly(3-hydroxybutyrate), P(3HB), and poly(3-hydroxyoctanoate), P(3HO), have been combined to form blend fibres for directional guidance of neuronal cell growth and differentiation. A 25:75 P(3HO)/P(3HB) blend (PHA blend) was used for the manufacturing of electrospun fibres as resorbable scaffolds to be used as internal guidance lumen structures in nerve conduits. The biocompatibility of these fibres was studied using neuronal and Schwann cells. Highly aligned and uniform fibres with varying diameters were fabricated by controlling electrospinning parameters. The resulting fibre diameters were 2.4 ± 0.3, 3.7 ± 0.3, and 13.5 ± 2.3 μm for small, medium, and large diameter fibres, respectively. The cell response to these electrospun fibres was investigated with respect to growth and differentiation. Cell migration observed on the electrospun fibres showed topographical guidance in accordance with the direction of the fibres. The correlation between fibre diameter and neuronal growth under two conditions, individually and in coculture with Schwann cells, was evaluated. Results obtained from both assays revealed that all PHA blend fibre groups were able to support growth and guide aligned distribution of neuronal cells, and there was a direct correlation between the fibre diameter and neuronal growth and differentiation. This work has led to the development of a family of unique biodegradable and highly biocompatible 3D substrates capable of guiding and facilitating the growth, proliferation, and differentiation of neuronal cells as internal structures within nerve conduits.
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Affiliation(s)
- Lorena R. Lizarraga‐Valderrama
- Applied Biotechnology Research Group, School of Life Sciences, College of Liberal Arts and SciencesUniversity of WestminsterLondonUK
| | - Caroline S. Taylor
- Department of Materials Science and EngineeringUniversity of SheffieldSheffieldUK
| | - Frederik Claeyssens
- Department of Materials Science and EngineeringUniversity of SheffieldSheffieldUK
| | - John W. Haycock
- Department of Materials Science and EngineeringUniversity of SheffieldSheffieldUK
| | - Jonathan C. Knowles
- Division of Biomaterials and Tissue EngineeringUCL Eastman Dental InstituteLondonUK
- Department of Nanobiomedical Science and BK21 Plus NBM, Global Research Center for Regenerative MedicineDankook UniversityCheonanSouth Korea
- The Discoveries Centre for Regenerative and Precision MedicineUCL CampusLondonUK
- UCL Eastman‐Korea Dental Medicine Innovation CentreDankook UniversityCheonanSouth Korea
| | - Ipsita Roy
- Applied Biotechnology Research Group, School of Life Sciences, College of Liberal Arts and SciencesUniversity of WestminsterLondonUK
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Shahriari D, Loke G, Tafel I, Park S, Chiang PH, Fink Y, Anikeeva P. Scalable Fabrication of Porous Microchannel Nerve Guidance Scaffolds with Complex Geometries. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1902021. [PMID: 31168865 PMCID: PMC6663568 DOI: 10.1002/adma.201902021] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Revised: 05/15/2019] [Indexed: 05/24/2023]
Abstract
Microchannel scaffolds accelerate nerve repair by guiding growing neuronal processes across injury sites. Although geometry, materials chemistry, stiffness, and porosity have been shown to influence nerve growth within nerve guidance scaffolds, independent tuning of these properties in a high-throughput manner remains a challenge. Here, fiber drawing is combined with salt leaching to produce microchannels with tunable cross sections and porosity. This technique is applicable to an array of biochemically inert polymers, and it delivers hundreds of meters of porous microchannel fibers. Employing these fibers as filaments during 3D printing enables the production of microchannel scaffolds with geometries matching those of biological nerves, including branched topographies. Applied to sensory neurons, fiber-based porous microchannels enhance growth as compared to non-porous channels with matching materials and geometries. The combinatorial scaffold fabrication approach may advance the studies of neural regeneration and accelerate the development of nerve repair devices.
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Affiliation(s)
- Dena Shahriari
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- McGovern Institute for Brain Research, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Gabriel Loke
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Ian Tafel
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- McGovern Institute for Brain Research, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- Department of Neurosurgery, Brigham and Women's Hospital, Boston, MA, 02115, USA
| | - Seongjun Park
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- McGovern Institute for Brain Research, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Po-Han Chiang
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- McGovern Institute for Brain Research, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Yoel Fink
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- Advanced Functional Fabrics of America, Cambridge, MA, 02139, USA
| | - Polina Anikeeva
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- McGovern Institute for Brain Research, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
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11
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Canadas RF, Ren T, Tocchio A, Marques AP, Oliveira JM, Reis RL, Demirci U. Tunable anisotropic networks for 3-D oriented neural tissue models. Biomaterials 2018; 181:402-414. [DOI: 10.1016/j.biomaterials.2018.07.055] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2018] [Revised: 07/24/2018] [Accepted: 07/28/2018] [Indexed: 02/06/2023]
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