1
|
Aydeger A, Aysit N, Baydas G, Cakici C, Erim UC, Arpa MD, Ozcicek I. Design of IKVAV peptide/gold nanoparticle decorated, micro/nano-channeled PCL/PLGA film scaffolds for neuronal differentiation and neurite outgrowth. BIOMATERIALS ADVANCES 2023; 152:213472. [PMID: 37301056 DOI: 10.1016/j.bioadv.2023.213472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 05/02/2023] [Accepted: 05/09/2023] [Indexed: 06/12/2023]
Abstract
In the field of neural tissue engineering, intensive efforts are being made to develop tissue scaffolds that can support an effective functional recovery and neural development by guiding damaged axons and neurites. Micro/nano-channeled conductive biomaterials are considered a promising approach for repairing the injured neural tissues. Many studies have demonstrated that the micro/nano-channels and aligned nanofibers could guide the neurites to extend along the direction of alignment. However, an ideal biocompatible scaffold containing conductive arrays that could promote effective neural stem cell differentiation and development, and also stimulate high neurite guidance has not been fully developed. In the current study, we aimed to fabricate micro/nano-channeled polycaprolactone (PCL)/Poly-d,l-lactic-co-glycolic acid (PLGA) hybrid film scaffolds, decorate their surfaces with IKVAV pentapeptide/gold nanoparticles (AuNPs), and investigate the behavior of PC12 cells and neural stem cells (NSCs) on the developed biomaterial under static/bioreactor conditions. Here we show that channeled groups decorated with AuNPs highly promote neurite outgrowth and neuronal differentiation along linear lines in the presence of electrical stimulation, compared with the polypyrrole (PPy) coating, which has been used traditionally for many years. Hopefully, this newly developed channeled scaffold structure (PCL/PLGA-AuNPs-IKVAV) could help to support long-distance axonal regeneration and neuronal development after different neural damages.
Collapse
Affiliation(s)
- Asel Aydeger
- Graduate School of Health Sciences, Istanbul Medipol University, Istanbul, Turkey
| | - Nese Aysit
- Department of Medical Biology, School of Medicine, Istanbul Medipol University, Istanbul, Turkey; Research Institute for Health Sciences and Technologies (SABITA), Istanbul Medipol University, Istanbul, Turkey
| | - Gulsena Baydas
- Graduate School of Health Sciences, Istanbul Medipol University, Istanbul, Turkey; Research Institute for Health Sciences and Technologies (SABITA), Istanbul Medipol University, Istanbul, Turkey; Department of Physiology, School of Medicine, Istanbul Medipol University, Istanbul, Turkey
| | - Cagri Cakici
- Department of Medical Biochemistry, School of Medicine, Istanbul Medipol University, Istanbul, Turkey
| | - Umit Can Erim
- Department of Analytical Chemistry, School of Pharmacy, Istanbul Medipol University, Istanbul, Turkey
| | - Muhammet Davut Arpa
- Department of Pharmaceutical Technology, School of Pharmacy, Istanbul Medipol University, Istanbul, Turkey
| | - Ilyas Ozcicek
- Department of Medical Biology, School of Medicine, Istanbul Medipol University, Istanbul, Turkey; Research Institute for Health Sciences and Technologies (SABITA), Istanbul Medipol University, Istanbul, Turkey.
| |
Collapse
|
2
|
Pourkhodadad S, Hosseinkazemi H, Bonakdar S, Nekounam H. Biomimetic engineered approaches for neural tissue engineering: Spinal cord injury. J Biomed Mater Res B Appl Biomater 2023; 111:701-716. [PMID: 36214332 DOI: 10.1002/jbm.b.35171] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 07/16/2022] [Accepted: 09/03/2022] [Indexed: 01/21/2023]
Abstract
The healing process for spinal cord injuries is complex and presents many challenges. Current advances in nerve regeneration are based on promising tissue engineering techniques, However, the chances of success depend on better mimicking the extracellular matrix (ECM) of neural tissue and better supporting neurons in a three-dimensional environment. The ECM provides excellent biological conditions, including desirable morphological features, electrical conductivity, and chemical compositions for neuron attachment, proliferation and function. This review outlines the rationale for developing a construct for neuron regrowth in spinal cord injury using appropriate biomaterials and scaffolding techniques.
Collapse
Affiliation(s)
| | - Hessam Hosseinkazemi
- Department of Biomedical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
| | - Shahin Bonakdar
- National Cell Bank Department, Pasteur Institute of Iran, Tehran, Iran
| | - Houra Nekounam
- Department of Medical Nanotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| |
Collapse
|
3
|
Sakpal D, Gharat S, Momin M. Recent advancements in polymeric nanofibers for ophthalmic drug delivery and ophthalmic tissue engineering. BIOMATERIALS ADVANCES 2022; 141:213124. [PMID: 36148709 DOI: 10.1016/j.bioadv.2022.213124] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 09/10/2022] [Accepted: 09/15/2022] [Indexed: 06/16/2023]
Abstract
Nanofibers due to their unique properties such as high surface-to-volume ratio, porous structure, mechanical strength, flexibility and their resemblance to the extracellular matrix, have been researched extensively in the field of ocular drug delivery and tissue engineering. Further, different modifications considering the formulation and process parameters have been carried out to alter the drug release profile and its interaction with the surrounding biological environment. Electrospinning is the most commonly used technique for preparing nanofibers with industrial scalability. Advanced techniques such as co-axial electrospinning and combined system such as embedding nanoparticles in nanofiber provide an alternative approach to enhance the performance of the scaffold. Electrospun nanofibers offers a matrix like structure for cell regeneration. Nanofibers have been used for ocular delivery of various drugs like antibiotics, anti-inflammatory and various proteins. In addition, lens-coated medical devices provide new insights into the clinical use of nanofibers. Through fabricating the nanofibers researchers have overcome the issues of low bioavailability and compatibility with ocular tissue. Therefore, nanofibers have great potential in ocular drug delivery and tissue engineering and have the capacity to revolutionize these therapeutic areas in the field of ophthalmology. This review is mainly focused on the recent advances in the preparation of nanofibers and their applications in ocular drug delivery and tissue engineering. The authors have attempted to emphasize the processing challenges and future perspectives along with an overview of the safety and toxicity aspects of nanofibers.
Collapse
Affiliation(s)
- Darshana Sakpal
- Department of Pharmaceutics, SVKM's Dr. Bhanuben Nanavati College of Pharmacy, University of Mumbai, Maharashtra, India.
| | - Sankalp Gharat
- Department of Pharmaceutics, SVKM's Dr. Bhanuben Nanavati College of Pharmacy, University of Mumbai, Maharashtra, India.
| | - Munira Momin
- Department of Pharmaceutics, SVKM's Dr. Bhanuben Nanavati College of Pharmacy, University of Mumbai, Maharashtra, India; SVKM's Shri C B Patel Research Center for Chemistry and Biological Sciences, Mumbai, Maharashtra, India.
| |
Collapse
|
4
|
Esmaeili Abdar Z, Jafari R, Mohammadi P, Nadri S. The optimal electrical stimulation for neural differentiation of conjunctiva mesenchymal stem cells. Int J Artif Organs 2022; 45:695-703. [PMID: 35773946 DOI: 10.1177/03913988221109618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
AIMS The combination of biomaterial conductive scaffolds and electrical stimulation (ES) dramatically promotes stem cell differentiation into electro-responsive cells like neural cells. In this study, we aimed to fabricate PCL/PPY nanofiber scaffolds through the electrospinning method and investigate the effect of ES duration on neural differentiation of Conjunctiva Mesenchymal Stem Cells (CJMSCs). METHODS The topography of the fabricated scaffold was characterized using SEM and TEM microscopy, and its mechanical and other properties were determined by tensile, TGA, FTIR, and Contact angle tests. CJMSCs were seeded on the scaffolds and then subjected to electrical current (115 V m-1 at 100 Hz) with durations of 1, 3, and 7 min for 3 days. Then the effect of nanofiber scaffold and electrical currents on cell viability and expression of neural marker genes (Nestin, β-tubulin, MAP-2) was investigated by MTT assay and qPCR analysis. RESULTS Our results revealed the good biocompatibility of the PCL-PPy nanofiber scaffold, and according to q-PCR results, the electrical stimulation of 1 min day-1 for 3 days can induce neural differentiation of CJMSCs as indicated by the fold change of gene expression of Nestin (~127), B-tubulin (~30), and MAP-2 (~52). CONCLUSION This study emphasizes that the utilization of an electrically conductive nanofibrous scaffold in conjunction with electrical current has potential applications in the field of neural tissue engineering.
Collapse
Affiliation(s)
- Zahra Esmaeili Abdar
- Department of Medical Nanotechnology, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Rahim Jafari
- Department of Medical Nanotechnology, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Parvin Mohammadi
- Department of Medical Biotechnology, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Samad Nadri
- Zanjan Metabolic Diseases Research Center, Zanjan University of Medical Sciences, Zanjan, Iran.,Zanjan Pharmaceutical Nanotechnology Research Center, Zanjan University of Medical Sciences, Zanjan, Iran
| |
Collapse
|
5
|
Wertheim L, Edri R, Goldshmit Y, Kagan T, Noor N, Ruban A, Shapira A, Gat‐Viks I, Assaf Y, Dvir T. Regenerating the Injured Spinal Cord at the Chronic Phase by Engineered iPSCs-Derived 3D Neuronal Networks. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2105694. [PMID: 35128819 PMCID: PMC9008789 DOI: 10.1002/advs.202105694] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Indexed: 05/08/2023]
Abstract
Cell therapy using induced pluripotent stem cell-derived neurons is considered a promising approach to regenerate the injured spinal cord (SC). However, the scar formed at the chronic phase is not a permissive microenvironment for cell or biomaterial engraftment or for tissue assembly. Engineering of a functional human neuronal network is now reported by mimicking the embryonic development of the SC in a 3D dynamic biomaterial-based microenvironment. Throughout the in vitro cultivation stage, the system's components have a synergistic effect, providing appropriate cues for SC neurogenesis. While the initial biomaterial supported efficient cell differentiation in 3D, the cells remodeled it to provide an inductive microenvironment for the assembly of functional SC implants. The engineered tissues are characterized for morphology and function, and their therapeutic potential is investigated, revealing improved structural and functional outcomes after acute and chronic SC injuries. Such technology is envisioned to be translated to the clinic to rewire human injured SC.
Collapse
Affiliation(s)
- Lior Wertheim
- Shmunis School of Biomedicine and Cancer ResearchFaculty of Life SciencesTel Aviv UniversityTel Aviv6997801Israel
- The Center for Nanoscience and NanotechnologyTel Aviv UniversityTel Aviv6997801Israel
- The Department of Materials Science and EngineeringFaculty of EngineeringTel Aviv UniversityTel Aviv6997801Israel
| | - Reuven Edri
- Shmunis School of Biomedicine and Cancer ResearchFaculty of Life SciencesTel Aviv UniversityTel Aviv6997801Israel
| | - Yona Goldshmit
- Shmunis School of Biomedicine and Cancer ResearchFaculty of Life SciencesTel Aviv UniversityTel Aviv6997801Israel
- Steyer School of Health ProfessionsSackler Faculty of MedicineTel‐Aviv UniversityTel Aviv6997801Israel
| | - Tomer Kagan
- Shmunis School of Biomedicine and Cancer ResearchFaculty of Life SciencesTel Aviv UniversityTel Aviv6997801Israel
| | - Nadav Noor
- Shmunis School of Biomedicine and Cancer ResearchFaculty of Life SciencesTel Aviv UniversityTel Aviv6997801Israel
| | - Angela Ruban
- Steyer School of Health ProfessionsSackler Faculty of MedicineTel‐Aviv UniversityTel Aviv6997801Israel
| | - Assaf Shapira
- Shmunis School of Biomedicine and Cancer ResearchFaculty of Life SciencesTel Aviv UniversityTel Aviv6997801Israel
| | - Irit Gat‐Viks
- Shmunis School of Biomedicine and Cancer ResearchFaculty of Life SciencesTel Aviv UniversityTel Aviv6997801Israel
| | - Yaniv Assaf
- School of Neurobiology, Biochemistry and BiophysicsFaculty of Life SciencesTel Aviv UniversityTel Aviv6997801Israel
- Sagol School of NeuroscienceTel Aviv UniversityTel Aviv6997801Israel
| | - Tal Dvir
- Shmunis School of Biomedicine and Cancer ResearchFaculty of Life SciencesTel Aviv UniversityTel Aviv6997801Israel
- The Center for Nanoscience and NanotechnologyTel Aviv UniversityTel Aviv6997801Israel
- Sagol School of NeuroscienceTel Aviv UniversityTel Aviv6997801Israel
- The Department of Biomedical EngineeringFaculty of EngineeringTel Aviv UniversityTel Aviv6997801Israel
- Sagol Center for Regenerative BiotechnologyTel Aviv UniversityTel Aviv6997801Israel
| |
Collapse
|
6
|
Strategies for effective neural circuit reconstruction after spinal cord injury: use of stem cells and biomaterials. World Neurosurg 2022; 161:82-89. [PMID: 35144032 DOI: 10.1016/j.wneu.2022.02.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Revised: 02/01/2022] [Accepted: 02/02/2022] [Indexed: 01/11/2023]
Abstract
Spinal cord injury (SCI), a serious disease of the central nervous system, often with irreversible loss of motor or sensory functions. Failure of axon connection and inhibition of microenvironment after SCI severely hinder the regeneration of damaged tissue and neuron function. Therefore, the new perspective of treatment of spinal cord injury is the reconstruction of neural circuit. Stem cells are a kind of cells with differentiation potential. They reconstruct local circulation by differentiating into neurons to replace damaged cells. It can also secrete various factors to regulate the host microenvironment and play a therapeutic role. Biomaterials can fill the cavity at the site of spinal cord injury, load therapeutic drugs, provide adsorption sites for transplanted cells and play a bridging role. In this review, the therapeutic role of stem cells and biomaterials is discussed, together with their properties, advantages, limitations, and future perspectives, providing a reference for basic and clinical research on SCI treatment.
Collapse
|
7
|
Asghari Niari S, Rahbarghazi R, Salehi R, Kazemi L, Fathi Karkan S, Karimipour M. Fabrication, characterization and evaluation of the effect of PLGA and PLGA-PEG biomaterials on the proliferation and neurogenesis potential of human neural SH-SY5Y cells. Microsc Res Tech 2021; 85:1433-1443. [PMID: 34859937 DOI: 10.1002/jemt.24006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 10/26/2021] [Accepted: 11/05/2021] [Indexed: 12/18/2022]
Abstract
In recent years with regard to the development of nanotechnology and neural stem cell discovery, the combinatorial therapeutic strategies of neural progenitor cells and appropriate biomaterials have raised the hope for brain regeneration following neurological disorders. This study aimed to explore the proliferation and neurogenic effect of PLGA and PLGA-PEG nanofibers on human SH-SY5Y cells in in vitro condition. Nanofibers of PLGA and PLGA-PEG biomaterials were synthesized and fabricated using electrospinning method. Physicochemical features were examined using HNMR, FT-IR, and water contact angle assays. Ultrastructural morphology, the orientation of nanofibers, cell distribution and attachment were visualized by SEM imaging. Cell survival and proliferation rate were measured. Differentiation capacity was monitored by immunofluorescence staining of Map-2. HNMR, FT-IR assays confirmed the integration of PEG to PLGA backbone. Water contact angel assay showed increasing surface hydrophilicity in PLGA-PEG biomaterial compared to the PLGA substrate. SEM analysis revealed the reduction of PLGA-PEG nanofibers' diameter compared to the PLGA group. Cell attachment was observed in both groups while PLGA-PEG had a superior effect in the promotion of survival rate compared to other groups (p < .05). Compared to the PLGA group, PLGA-PEG increased the number of Ki67+ cells (p < .01). PLGA-PEG biomaterial induced neural maturation by increasing protein Map-2 compared to the PLGA scaffold in a three-dimensional culture system. According to our data, structural modification of PLGA with PEG could enhance orientated differentiation and the dynamic growth of neural cells.
Collapse
Affiliation(s)
- Shabnam Asghari Niari
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Anatomical Sciences, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Reza Rahbarghazi
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Applied Cell Sciences, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Roya Salehi
- Department of Nanotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Leila Kazemi
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Anatomical Sciences, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Sonia Fathi Karkan
- Department of Nanotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran.,Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Karimipour
- Department of Anatomical Sciences, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Applied Cell Sciences, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| |
Collapse
|
8
|
Behtaj S, Öchsner A, Anissimov YG, Rybachuk M. Retinal Tissue Bioengineering, Materials and Methods for the Treatment of Glaucoma. Tissue Eng Regen Med 2020; 17:253-269. [PMID: 32390117 PMCID: PMC7260329 DOI: 10.1007/s13770-020-00254-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 03/17/2020] [Accepted: 03/19/2020] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Glaucoma, a characteristic type of optic nerve degeneration in the posterior pole of the eye, is a common cause of irreversible vision loss and the second leading cause of blindness worldwide. As an optic neuropathy, glaucoma is identified by increasing degeneration of retinal ganglion cells (RGCs), with consequential vision loss. Current treatments only postpone the development of retinal degeneration, and there are as yet no treatments available for this disability. Recent studies have shown that replacing lost or damaged RGCs with healthy RGCs or RGC precursors, supported by appropriately designed bio-material scaffolds, could facilitate the development and enhancement of connections to ganglion cells and optic nerve axons. The consequence may be an improved retinal regeneration. This technique could also offer the possibility for retinal regeneration in treating other forms of optic nerve ailments through RGC replacement. METHODS In this brief review, we describe the innovations and recent developments in retinal regenerative medicine such as retinal organoids and gene therapy which are specific to glaucoma treatment and focus on the selection of appropriate bio-engineering principles, biomaterials and cell therapies that are presently employed in this growing research area. RESULTS Identification of optimal sources of cells, improving cell survival, functional integration upon transplantation, and developing techniques to deliver cells into the retinal space without provoking immune responses are the main challenges in retinal cell replacement therapies. CONCLUSION The restoration of visual function in glaucoma patients by the RGC replacement therapies requires appropriate protocols and biotechnology methods. Tissue-engineered scaffolds, the generation of retinal organoids, and gene therapy may help to overcome some of the challenges in the generation of clinically safe RGCs.
Collapse
Affiliation(s)
- Sanaz Behtaj
- School of Engineering and Built Environment, Griffith University, Engineering Drive, Southport, QLD, 4222, Australia
- Queensland Micro- and Nanotechnology Centre, Griffith University, West Creek Road, Nathan, QLD, 4111, Australia
- Department of Cell and Molecular Biology, Cell Science Research Centre, Royan Institute for Biotechnology, Isfahan, Iran
| | - Andreas Öchsner
- Faculty of Mechanical Engineering, Esslingen University of Applied Sciences, Kanalstrasse 33, 73728, Esslingen, Germany
| | - Yuri G Anissimov
- Queensland Micro- and Nanotechnology Centre, Griffith University, West Creek Road, Nathan, QLD, 4111, Australia
- School of Environment and Science, Griffith University, Parklands Drive, Southport, QLD, 4222, Australia
- Institute of Molecular Medicine, I.M. Sechenov First Moscow State Medical University, Moscow, 119146, Russia
| | - Maksym Rybachuk
- Queensland Micro- and Nanotechnology Centre, Griffith University, West Creek Road, Nathan, QLD, 4111, Australia.
- School of Engineering and Built Environment, Griffith University, 170 Kessels Road, Nathan, QLD, 4111, Australia.
| |
Collapse
|
9
|
Recent Advances in Carbon Nanotubes for Nervous Tissue Regeneration. ADVANCES IN POLYMER TECHNOLOGY 2020. [DOI: 10.1155/2020/6861205] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Regenerative medicine has taken advantage of several nanomaterials for reparation of diseased or damaged tissues in the nervous system involved in memory, cognition, and movement. Electrical, thermal, mechanical, and biocompatibility aspects of carbon-based nanomaterials (nanotubes, graphene, fullerenes, and their derivatives) make them suitable candidates to drive nerve tissue repair and stimulation. This review article focuses on key recent advances on the use of carbon nanotube- (CNT-) based technologies on nerve tissue engineering, outlining how neurons interact with CNT interfaces for promoting neuronal differentiation, growth and network reconstruction. CNTs still represent strong candidates for use in therapies of neurodegenerative pathologies and spinal cord injuries.
Collapse
|
10
|
Arslan YE, Efe B, Sezgin Arslan T. A novel method for constructing an acellular 3D biomatrix from bovine spinal cord for neural tissue engineering applications. Biotechnol Prog 2019; 35:e2814. [PMID: 30963718 DOI: 10.1002/btpr.2814] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 03/21/2019] [Accepted: 04/03/2019] [Indexed: 12/29/2022]
Abstract
In this study, we aimed at generating 3-dimensional (3D) decellularized bovine spinal cord extracellular matrix-based scaffolds (3D-dCBS) for neural tissue engineering applications. Within this scope, bovine spinal cord tissue pieces were homogenized in 0.1 M NaOH and this viscous mixture was molded to attain 3D bioscaffolds. After resultant bioscaffolds were chemically crosslinked, the decellularization process was conducted with detergent, buffer, and enzyme solutions. Nuclear remnants in the native tissue and 3D-dCBS were determined with DNA content analysis and agarose gel electrophoresis. Afterward, 3D-dCBS were biochemically characterized in depth via glycosaminoglycan (GAG) content, hydroxyproline (HYP) assay, and sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). Cellular survival of human adipose-derived mesenchymal stem cells (hAMSCs) on the 3D-dCBS for 3rd, 7th, and 10th days was assessed via MTT assay. Scaffold and cell/scaffold constructs were also evaluated with scanning electron microscopy and histochemical studies. DNA contents for native and 3D-dCBS were respectively found to be 520.76 ± 18.11 and 28.80 ± 0.20 ng/mg dry weight (n = 3), indicating a successful decellularization process. GAG content, HYP assay, and SDS-PAGE results proved that the extracellular matrix was substantially preserved during the decellularization process. In conclusion, it is believed that the novel decellularization method may allow fabricating 3D bioscaffolds with desired geometry from soft nervous system tissues.
Collapse
Affiliation(s)
- Yavuz Emre Arslan
- Regenerative Biomaterials Laboratory, Department of Bioengineering, Engineering Faculty, Canakkale Onsekiz Mart University, Canakkale, Turkey
| | - Burcu Efe
- Regenerative Biomaterials Laboratory, Department of Bioengineering, Engineering Faculty, Canakkale Onsekiz Mart University, Canakkale, Turkey
| | - Tugba Sezgin Arslan
- Regenerative Biomaterials Laboratory, Department of Bioengineering, Engineering Faculty, Canakkale Onsekiz Mart University, Canakkale, Turkey
| |
Collapse
|
11
|
Rahmani A, Nadri S, Kazemi HS, Mortazavi Y, Sojoodi M. Conductive electrospun scaffolds with electrical stimulation for neural differentiation of conjunctiva mesenchymal stem cells. Artif Organs 2019; 43:780-790. [PMID: 30674064 DOI: 10.1111/aor.13425] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 01/13/2019] [Accepted: 01/17/2019] [Indexed: 12/23/2022]
Abstract
An electrical stimulus is a new approach to neural differentiation of stem cells. In this work, the neural differentiation of conjunctiva mesenchymal stem cells (CJMSCs) on a new 3D conductive fibrous scaffold of silk fibroin (SF) and reduced graphene oxide (rGo) were examined. rGo (3.5% w/w) was dispersed in SF-acid formic solution (10% w/v) and conductive nanofibrous scaffold was fabricated using the electrospinning method. SEM and TEM microscopies were used for fibrous scaffold characterization. CJMSCs were cultured on the scaffold and 2 electrical impulse models (Current 1:115 V/m, 100-Hz frequency and current 2:115 v/m voltages, 0.1-Hz frequency) were applied for 7 days. Also, the effect of the fibrous scaffold and electrical impulses on cell viability and neural gene expression were examined using MTT assay and qPCR analysis. Fibrous scaffold with the 220 ± 20 nm diameter and good dispersion of graphene nanosheets at the surface of nanofibers were fabricated. The MTT result showed the viability of cells on the scaffold, with current 2 lower than current 1. qPCR analysis confirmed that the expression of β-tubulin (2.4-fold P ≤ 0.026), MAP-2 (1.48-fold; P ≤ 0.03), and nestin (1.5-fold; P ≤ 0.03) genes were higher in CJMSCs on conductive scaffold with 100-Hz frequency compared to 0.1-Hz frequency. Collectively, we proposed that SF-rGo fibrous scaffolds, as a new conductive fibrous scaffold with electrical stimulation are good strategies for neural differentiation of stem cells and the type of electrical pulses has an influence on neural differentiation and proliferation of CJMSCs.
Collapse
Affiliation(s)
- Ali Rahmani
- Department of Medical Nanotechnology, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Samad Nadri
- Department of Medical Nanotechnology, Zanjan University of Medical Sciences, Zanjan, Iran.,Zanjan Metabolic Diseases Research Center, Zanjan University of Medical Sciences, Zanjan, Iran.,Zanjan Pharmaceutical Nanotechnology Research Center, Zanjan University of Medical Sciences, Zanjan, Iran.,Cancer Gene Therapy Research Center, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Habib Sayed Kazemi
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, Iran
| | - Yousef Mortazavi
- Cancer Gene Therapy Research Center, Zanjan University of Medical Sciences, Zanjan, Iran.,Department of Medical Biotechnology, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Mahdi Sojoodi
- Department of Electrical and Computer Engineering, Tarbiat Modares University, Tehran, Iran
| |
Collapse
|
12
|
Zhu W, Zhang H, Chen X, Jin K, Ning L. Numerical characterization of regenerative axons growing along a spherical multifunctional scaffold after spinal cord injury. PLoS One 2018; 13:e0205961. [PMID: 30365562 PMCID: PMC6203361 DOI: 10.1371/journal.pone.0205961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Accepted: 10/04/2018] [Indexed: 11/18/2022] Open
Abstract
Spinal cord injury (SCI) followed by extensive cell loss, inflammation, and scarring, often permanently damages neurological function. Biomaterial scaffolds are promising but currently have limited applicability in SCI because after entering the scaffold, regenerating axons tend to become trapped and rarelyre-enter the host tissue, the reasons for which remain to be completely explored. Here, we propose a mathematical model and computer simulation for characterizing regenerative axons growing along a scaffold following SCI, and how their growth may be guided. The model assumed a solid, spherical, multifunctional, biomaterial scaffold, that would bridge the rostral and caudal stumps of a completely transected spinal cord in a rat model and would guide the rostral regenerative axons toward the caudal tissue. Other assumptions include the whole scaffold being coated with extracellular matrix components, and the caudal area being additionally seeded with chemoattractants. The chemical factors on and around the scaffold were formulated to several coupled variables, and the parameter values were derived fromexisting experimental data. Special attention was given to the effects of coating strength, seeding location, and seeding density, as well as the ramp slope of the scaffold, on axonal regeneration. In numerical simulations, a slimmer scaffold provided a small slope at the entry "on-ramp" area that improved the success rate of axonal regeneration. If success rates are high, an increased number of regenerative axons traverse through the narrow channels, causing congestion and lowering the growth rate. An increase in the number of severed axons (300-12000) did not significantly affect the growth rate, but it reduced the success rate of axonal regeneration. However, an increase in the seeding densities of the complexes on the whole scaffold, and that in the seeding densities of the chemoattractants on the caudal area, improved both the success and growth rates. However, an increase in the density of thecomplexes on the whole scaffold risks an over-eutrophic surface that harms axonal regeneration.Although theoretical predictions are yet to be validated directly by experiments, this theoretical tool can advance the treatment of SCI, and is also applicable to scaffolds with other architectures.
Collapse
Affiliation(s)
- Weiping Zhu
- Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai, People's Republic of China
- * E-mail:
| | - Han Zhang
- Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai, People's Republic of China
| | - Xuning Chen
- Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai, People's Republic of China
| | - Kan Jin
- Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai, People's Republic of China
| | - Le Ning
- Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai, People's Republic of China
| |
Collapse
|
13
|
Reddy S, Xu X, Guo T, Zhu R, He L, Ramakrishana S. Allotropic carbon (graphene oxide and reduced graphene oxide) based biomaterials for neural regeneration. CURRENT OPINION IN BIOMEDICAL ENGINEERING 2018. [DOI: 10.1016/j.cobme.2018.05.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
14
|
Borah R, Ingavle GC, Sandeman SR, Kumar A, Mikhalovsky S. Electrically conductive MEH-PPV:PCL electrospun nanofibres for electrical stimulation of rat PC12 pheochromocytoma cells. Biomater Sci 2018; 6:2342-2359. [DOI: 10.1039/c8bm00559a] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Electrically conductive, porous, mechanically strong and bioactive electrospun MEH-PPV:PCL nanofibres with blended and core-sheath formulations for enhanced neurite formation and neurite outgrowth.
Collapse
Affiliation(s)
- Rajiv Borah
- Materials Research Laboratory
- Department of Physics
- Tezpur University
- Tezpur
- India
| | - Ganesh C. Ingavle
- Biomaterials and Medical Devices Research Group
- School of Pharmacy and Biomolecular Sciences
- Huxley Building
- University of Brighton
- Brighton BN2 4GJ
| | - Susan R. Sandeman
- Biomaterials and Medical Devices Research Group
- School of Pharmacy and Biomolecular Sciences
- Huxley Building
- University of Brighton
- Brighton BN2 4GJ
| | - Ashok Kumar
- Materials Research Laboratory
- Department of Physics
- Tezpur University
- Tezpur
- India
| | - Sergey Mikhalovsky
- Biomaterials and Medical Devices Research Group
- School of Pharmacy and Biomolecular Sciences
- Huxley Building
- University of Brighton
- Brighton BN2 4GJ
| |
Collapse
|
15
|
Oh SH, Kang JG, Kim TH, Namgung U, Song KS, Jeon BH, Lee JH. Enhanced peripheral nerve regeneration through asymmetrically porous nerve guide conduit with nerve growth factor gradient. J Biomed Mater Res A 2017; 106:52-64. [DOI: 10.1002/jbm.a.36216] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Revised: 08/27/2017] [Accepted: 08/30/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Se Heang Oh
- Department of Nanobiomedical Science; Dankook University; Cheonan 31116 Republic of Korea
- Department of Pharmaceutical Engineering; Dankook University; Cheonan 31116 Republic of Korea
| | - Jun Goo Kang
- Department of Advanced Materials and Chemical Engineering; Hannam University; Daejeon 34054 Republic of Korea
| | - Tae Ho Kim
- Department of Advanced Materials and Chemical Engineering; Hannam University; Daejeon 34054 Republic of Korea
| | - Uk Namgung
- Department of Oriental Medicine; Daejeon University; Daejeon 34520 Republic of Korea
| | - Kyu Sang Song
- Department of Pathology, School of Medicine; Chungnam National University; Daejeon 35015 Republic of Korea
| | - Byeong Hwa Jeon
- Department of Physiology, School of Medicine; Chungnam National University; Daejeon 35015 Republic of Korea
| | - Jin Ho Lee
- Department of Advanced Materials and Chemical Engineering; Hannam University; Daejeon 34054 Republic of Korea
| |
Collapse
|
16
|
Zhou JF, Wang YG, Cheng L, Wu Z, Sun XD, Peng J. Preparation of polypyrrole-embedded electrospun poly(lactic acid) nanofibrous scaffolds for nerve tissue engineering. Neural Regen Res 2016; 11:1644-1652. [PMID: 27904497 PMCID: PMC5116845 DOI: 10.4103/1673-5374.193245] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/01/2016] [Indexed: 12/17/2022] Open
Abstract
Polypyrrole (PPy) is a biocompatible polymer with good conductivity. Studies combining PPy with electrospinning have been reported; however, the associated decrease in PPy conductivity has not yet been resolved. We embedded PPy into poly(lactic acid) (PLA) nanofibers via electrospinning and fabricated a PLA/PPy nanofibrous scaffold containing 15% PPy with sustained conductivity and aligned topography. There was good biocompatibility between the scaffold and human umbilical cord mesenchymal stem cells as well as Schwann cells. Additionally, the direction of cell elongation on the scaffold was parallel to the direction of fibers. Our findings suggest that the aligned PLA/PPy nanofibrous scaffold is a promising biomaterial for peripheral nerve regeneration.
Collapse
Affiliation(s)
- Jun-feng Zhou
- Key Laboratory of Advanced Materials of Ministry of Education of China, School of Materials Science and Engineering, Tsinghua University, Beijing, China
| | - Yi-guo Wang
- Institute of Orthopedics, Chinese PLA General Hospital, Beijing, China
- School of Medicine, Nankai University, Tianjin, China
| | - Liang Cheng
- Key Laboratory of Advanced Materials of Ministry of Education of China, School of Materials Science and Engineering, Tsinghua University, Beijing, China
| | - Zhao Wu
- Key Laboratory of Advanced Materials of Ministry of Education of China, School of Materials Science and Engineering, Tsinghua University, Beijing, China
| | - Xiao-dan Sun
- Key Laboratory of Advanced Materials of Ministry of Education of China, School of Materials Science and Engineering, Tsinghua University, Beijing, China
| | - Jiang Peng
- Institute of Orthopedics, Chinese PLA General Hospital, Beijing, China
- The Neural Regeneration Co-innovation Center of Jiangsu Province, Nantong, Jiangsu Province, China
| |
Collapse
|
17
|
Chamling X, Sluch VM, Zack DJ. The Potential of Human Stem Cells for the Study and Treatment of Glaucoma. Invest Ophthalmol Vis Sci 2016; 57:ORSFi1-6. [PMID: 27116666 PMCID: PMC5110236 DOI: 10.1167/iovs.15-18590] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Accepted: 01/05/2016] [Indexed: 01/01/2023] Open
Abstract
PURPOSE Currently, the only available and approved treatments for glaucoma are various pharmacologic, laser-based, and surgical procedures that lower IOP. Although these treatments can be effective, they are not always sufficient, and they cannot restore vision that has already been lost. The goal of this review is to briefly assess current developments in the application of stem cell biology to the study and treatment of glaucoma and other forms of optic neuropathy. METHODS A combined literature review and summary of the glaucoma-related discussion at the 2015 "Sight Restoration Through Stem Cell Therapy" meeting that was sponsored by the Ocular Research Symposia Foundation (ORSF). RESULTS Ongoing advancements in basic and eye-related developmental biology have enabled researchers to direct murine and human stem cells along specific developmental paths and to differentiate them into a variety of ocular cell types of interest. The most advanced of these efforts involve the differentiation of stem cells into retinal pigment epithelial cells, work that has led to the initiation of several human trials. More related to the glaucoma field, there have been recent advances in developing protocols for differentiation of stem cells into trabecular meshwork and retinal ganglion cells. Additionally, efforts are being made to generate stem cell-derived cells that can be used to secrete neuroprotective factors. CONCLUSIONS Advancing stem cell technology provides opportunities to improve our understanding of glaucoma-related biology and develop models for drug development, and offers the possibility of cell-based therapies to restore sight to patients who have already lost vision.
Collapse
Affiliation(s)
- Xitiz Chamling
- Department of Ophthalmology Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
| | - Valentin M. Sluch
- Department of Ophthalmology Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
- Department of Molecular Biology and Genetics, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
| | - Donald J. Zack
- Department of Ophthalmology Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
- Department of Molecular Biology and Genetics, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
- The Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
- Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
| |
Collapse
|
18
|
Chen C, Kong X, Lee IS. Modification of surface/neuron interfaces for neural cell-type specific responses: a review. ACTA ACUST UNITED AC 2015; 11:014108. [PMID: 26694886 DOI: 10.1088/1748-6041/11/1/014108] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Surface/neuron interfaces have played an important role in neural repair including neural prostheses and tissue engineered scaffolds. This comprehensive literature review covers recent studies on the modification of surface/neuron interfaces. These interfaces are identified in cases both where the surfaces of substrates or scaffolds were in direct contact with cells and where the surfaces were modified to facilitate cell adhesion and controlling cell-type specific responses. Different sources of cells for neural repair are described, such as pheochromocytoma neuronal-like cell, neural stem cell (NSC), embryonic stem cell (ESC), mesenchymal stem cell (MSC) and induced pluripotent stem cell (iPS). Commonly modified methods are discussed including patterned surfaces at micro- or nano-scale, surface modification with conducting coatings, and functionalized surfaces with immobilized bioactive molecules. These approaches to control cell-type specific responses have enormous potential implications in neural repair.
Collapse
Affiliation(s)
- Cen Chen
- Bio-X Center, College of Life Sciences, Zhejiang Sci-Tech University, Hangzhou 310018, People's Republic of China
| | | | | |
Collapse
|
19
|
Wang B, Yuan J, Xu J, Xie J, Wang G, Dong P. Neurotrophin expression and laryngeal muscle pathophysiology following recurrent laryngeal nerve transection. Mol Med Rep 2015; 13:1234-42. [PMID: 26677138 PMCID: PMC4732864 DOI: 10.3892/mmr.2015.4684] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Accepted: 11/19/2015] [Indexed: 11/05/2022] Open
Abstract
Laryngeal palsy often occurs as a result of recurrent laryngeal or vagal nerve injury during oncological surgery of the head and neck, affecting quality of life and increasing economic burden. Reinnervation following recurrent laryngeal nerve (RLN) injury is difficult despite development of techniques, such as neural anastomosis, nerve grafting and creation of a laryngeal muscle pedicle. In the present study, due to the limited availability of human nerve tissue for research, a rat model was used to investigate neurotrophin expression and laryngeal muscle pathophysiology in RLN injury. Twenty-five male Sprague-Dawley rats underwent right RLN transection with the excision of a 5-mm segment. Vocal fold movements, vocalization, histology and immunostaining were evaluated at different time-points (3, 6, 10 and 16 weeks). Although vocalization was restored, movement of the vocal fold failed to return to normal levels following RLN injury. The expression of brain‑derived neurotrophic factor and glial cell line-derived neurotrophic factor differed in the thyroarytenoid (TA) and posterior cricoarytenoid muscles. The number of axons did not increase to baseline levels over time. Furthermore, normal muscle function was unlikely with spontaneous reinnervation. During regeneration following RLN injury, differences in the expression levels of neurotrophic factors may have resulted in preferential reinnervation of the TA muscles. Data from the present study indicated that neurotrophic factors may be applied for restoring the function of the laryngeal nerve following recurrent injury.
Collapse
Affiliation(s)
- Baoxin Wang
- Department of Otolaryngology, Head and Neck Surgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 201620, P.R. China
| | - Junjie Yuan
- Department of Orthopedics, Shanghai Fengxian District Central Hospital, Shanghai Jiao Tong University Affiliated Sixth People's Hospital South Campus, Shanghai 200011, P.R. China
| | - Jiafeng Xu
- School of Economics and Finance, Shanghai International Studies University, Shanghai 200083, P.R. China
| | - Jin Xie
- Department of Otolaryngology, Head and Neck Surgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 201620, P.R. China
| | - Guoliang Wang
- Department of Otolaryngology, Head and Neck Surgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 201620, P.R. China
| | - Pin Dong
- Department of Otolaryngology, Head and Neck Surgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 201620, P.R. China
| |
Collapse
|
20
|
Zhan J, Liu J, Wang C, Fan C, EI-Hamshary HA, Al-Deyab SS, Mo X. Electrospun silk fibroin–poly (lactic-co-glycolic acid) membrane for nerve tissue engineering. J BIOACT COMPAT POL 2015. [DOI: 10.1177/0883911515602709] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Silk fibroin–poly(lactic-co-glycolic acid) fibrous membranes were electrospun by varying the weight ratios for silk fibroin to poly(lactic-co-glycolic acid). The hydrophilicity, mechanical property, and biodegradability of the fibrous in vitro were evaluated. Contact angle test demonstrated that the hydrophilicity of poly(lactic-co-glycolic acid) fibrous membrane could be improved by introducing silk fibroin ingredient. Mechanical test showed that the strain–elongation performances of silk fibroin–poly(lactic-co-glycolic acid) fibrous can be controlled by changing the silk fibroin percentage. 3-(4,5-Dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium assay test showed that the silk fibroin–poly(lactic-co-glycolic acid) 2:8 fibrous enhanced the nerve cell proliferation compared to poly(lactic-co-glycolic acid) fibrous. Silk fibroin–poly(lactic-co-glycolic acid) fibrous membrane has been made into the nerve guidance conduit by the reeling and the sewing processing. The poly(lactic-co-glycolic acid) nerve guidance conduit and silk fibroin–poly(lactic-co-glycolic acid) nerve guidance conduit were implanted into a 10-mm sciatic nerve defect part of mice for nerve regeneration and the nerve regenerated at 12 weeks. Nerve regeneration test showed that the regenerated nerve in the silk fibroin–poly(lactic-co-glycolic acid) nerve guidance conduit group was more organized and mature than that in the poly(lactic-co-glycolic acid) nerve guidance conduit group. The results suggest that the silk fibroin–poly(lactic-co-glycolic acid) (2:8) nerve guidance conduits have potential applications in nerve regeneration.
Collapse
Affiliation(s)
- Jianchao Zhan
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, China
- College of Materials and Textile Engineering, Jiaxing University, Jiaxing, China
| | - Junyi Liu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, China
| | - Chunyang Wang
- Department of Orthopedic Surgery, Shanghai Sixth People’s Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Cunyi Fan
- Department of Orthopedic Surgery, Shanghai Sixth People’s Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Hany A EI-Hamshary
- Department of Chemistry, College of Science, King Saud University, Riyadh, Kingdom of Saudi Arabia
- Department of Chemistry, Faculty of Science, Tanta University, Tanta, Egypt
| | - Salem S Al-Deyab
- Department of Chemistry, College of Science, King Saud University, Riyadh, Kingdom of Saudi Arabia
| | - Xiumei Mo
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, China
- Department of Chemistry, College of Science, King Saud University, Riyadh, Kingdom of Saudi Arabia
| |
Collapse
|
21
|
Hydrogels and Cell Based Therapies in Spinal Cord Injury Regeneration. Stem Cells Int 2015; 2015:948040. [PMID: 26124844 PMCID: PMC4466497 DOI: 10.1155/2015/948040] [Citation(s) in RCA: 108] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Accepted: 12/14/2014] [Indexed: 01/01/2023] Open
Abstract
Spinal cord injury (SCI) is a central nervous system- (CNS-) related disorder for which there is yet no successful treatment. Within the past several years, cell-based therapies have been explored for SCI repair, including the use of pluripotent human stem cells, and a number of adult-derived stem and mature cells such as mesenchymal stem cells, olfactory ensheathing cells, and Schwann cells. Although promising, cell transplantation is often overturned by the poor cell survival in the treatment of spinal cord injuries. Alternatively, the therapeutic role of different cells has been used in tissue engineering approaches by engrafting cells with biomaterials. The latter have the advantages of physically mimicking the CNS tissue, while promoting a more permissive environment for cell survival, growth, and differentiation. The roles of both cell- and biomaterial-based therapies as single therapeutic approaches for SCI repair will be discussed in this review. Moreover, as the multifactorial inhibitory environment of a SCI suggests that combinatorial approaches would be more effective, the importance of using biomaterials as cell carriers will be herein highlighted, as well as the recent advances and achievements of these promising tools for neural tissue regeneration.
Collapse
|
22
|
Carballo-Molina OA, Velasco I. Hydrogels as scaffolds and delivery systems to enhance axonal regeneration after injuries. Front Cell Neurosci 2015; 9:13. [PMID: 25741236 PMCID: PMC4330895 DOI: 10.3389/fncel.2015.00013] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Accepted: 01/09/2015] [Indexed: 01/24/2023] Open
Abstract
Damage caused to neural tissue by disease or injury frequently produces a discontinuity in the nervous system (NS). Such damage generates diverse alterations that are commonly permanent, due to the limited regeneration capacity of the adult NS, particularly the Central Nervous System (CNS). The cellular reaction to noxious stimulus leads to several events such as the formation of glial and fibrous scars, which inhibit axonal regeneration in both the CNS and the Peripheral Nervous System (PNS). Although in the PNS there is some degree of nerve regeneration, it is common that the growing axons reinnervate incorrect areas, causing mismatches. Providing a permissive substrate for axonal regeneration in combination with delivery systems for the release of molecules, which enhances axonal growth, could increase regeneration and the recovery of functions in the CNS or the PNS. Currently, there are no effective vehicles to supply growth factors or cells to the damaged/diseased NS. Hydrogels are polymers that are biodegradable, biocompatible and have the capacity to deliver a large range of molecules in situ. The inclusion of cultured neural cells into hydrogels forming three-dimensional structures allows the formation of synapses and neuronal survival. There is also evidence showing that hydrogels constitute an amenable substrate for axonal growth of endogenous or grafted cells, overcoming the presence of axonal regeneration inhibitory molecules, in both the CNS and PNS. Recent experiments suggest that hydrogels can carry and deliver several proteins relevant for improving neuronal survival and axonal growth. Although the use of hydrogels is appealing, its effectiveness is still a matter of discussion, and more results are needed to achieve consistent recovery using different parameters. This review also discusses areas of opportunity where hydrogels can be applied, in order to promote axonal regeneration of the NS.
Collapse
Affiliation(s)
- Oscar A. Carballo-Molina
- Instituto de Fisiología Celular-Neurociencias, Universidad Nacional Autónoma de MéxicoMexico, D.F., Mexico
| | - Iván Velasco
- Instituto de Fisiología Celular-Neurociencias, Universidad Nacional Autónoma de MéxicoMexico, D.F., Mexico
| |
Collapse
|
23
|
Tian L, Prabhakaran MP, Ramakrishna S. Strategies for regeneration of components of nervous system: scaffolds, cells and biomolecules. Regen Biomater 2015; 2:31-45. [PMID: 26813399 PMCID: PMC4669026 DOI: 10.1093/rb/rbu017] [Citation(s) in RCA: 110] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Revised: 08/29/2014] [Accepted: 09/14/2014] [Indexed: 12/12/2022] Open
Abstract
Nerve diseases including acute injury such as peripheral nerve injury (PNI), spinal cord injury (SCI) and traumatic brain injury (TBI), and chronic disease like neurodegeneration disease can cause various function disorders of nervous system, such as those relating to memory and voluntary movement. These nerve diseases produce great burden for individual families and the society, for which a lot of efforts have been made. Axonal pathways represent a unidirectional and aligned architecture allowing systematic axonal development within the tissue. Following a traumatic injury, the intricate architecture suffers disruption leading to inhibition of growth and loss of guidance. Due to limited capacity of the body to regenerate axonal pathways, it is desirable to have biomimetic approach that has the capacity to graft a bridge across the lesion while providing optimal mechanical and biochemical cues for tissue regeneration. And for central nervous system injury, one more extra precondition is compulsory: creating a less inhibitory surrounding for axonal growth. Electrospinning is a cost-effective and straightforward technique to fabricate extracellular matrix (ECM)-like nanofibrous structures, with various fibrous forms such as random fibers, aligned fibers, 3D fibrous scaffold and core-shell fibers from a variety of polymers. The diversity and versatility of electrospinning technique, together with functionalizing cues such as neurotrophins, ECM-based proteins and conductive polymers, have gained considerable success for the nerve tissue applications. We are convinced that in the future the stem cell therapy with the support of functionalized electrospun nerve scaffolds could be a promising therapy to cure nerve diseases.
Collapse
Affiliation(s)
- Lingling Tian
- Mechanical Engineering, Faculty of Engineering, National University of Singapore, 2 Engineering Drive 3, Singapore 117576 and Nanoscience and Nanotechnology Initiative, National University of Singapore, 2 Engineering Drive 3, Singapore 117576
| | - Molamma P Prabhakaran
- Mechanical Engineering, Faculty of Engineering, National University of Singapore, 2 Engineering Drive 3, Singapore 117576 and Nanoscience and Nanotechnology Initiative, National University of Singapore, 2 Engineering Drive 3, Singapore 117576
| | - Seeram Ramakrishna
- Mechanical Engineering, Faculty of Engineering, National University of Singapore, 2 Engineering Drive 3, Singapore 117576 and Nanoscience and Nanotechnology Initiative, National University of Singapore, 2 Engineering Drive 3, Singapore 117576
| |
Collapse
|
24
|
Anderson M, Shelke NB, Manoukian OS, Yu X, McCullough LD, Kumbar SG. Peripheral Nerve Regeneration Strategies: Electrically Stimulating Polymer Based Nerve Growth Conduits. Crit Rev Biomed Eng 2015; 43:131-59. [PMID: 27278739 PMCID: PMC5266796 DOI: 10.1615/critrevbiomedeng.2015014015] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Treatment of large peripheral nerve damages ranges from the use of an autologous nerve graft to a synthetic nerve growth conduit. Biological grafts, in spite of many merits, show several limitations in terms of availability and donor site morbidity, and outcomes are suboptimal due to fascicle mismatch, scarring, and fibrosis. Tissue engineered nerve graft substitutes utilize polymeric conduits in conjunction with cues both chemical and physical, cells alone and or in combination. The chemical and physical cues delivered through polymeric conduits play an important role and drive tissue regeneration. Electrical stimulation (ES) has been applied toward the repair and regeneration of various tissues such as muscle, tendon, nerve, and articular tissue both in laboratory and clinical settings. The underlying mechanisms that regulate cellular activities such as cell adhesion, proliferation, cell migration, protein production, and tissue regeneration following ES is not fully understood. Polymeric constructs that can carry the electrical stimulation along the length of the scaffold have been developed and characterized for possible nerve regeneration applications. We discuss the use of electrically conductive polymers and associated cell interaction, biocompatibility, tissue regeneration, and recent basic research for nerve regeneration. In conclusion, a multifunctional combinatorial device comprised of biomaterial, structural, functional, cellular, and molecular aspects may be the best way forward for effective peripheral nerve regeneration.
Collapse
Affiliation(s)
- Matthew Anderson
- Department of Orthopaedic Surgery, UConn Health, Farmington, CT
- Institute for Regenerative Engineering, UConn Health, Farmington, CT
- Raymond and Beverly Sackler Center for Biomedical, Biological, Physical and Engineering Sciences, UConn Health, Farmington, CT
| | - Namdev B. Shelke
- Department of Orthopaedic Surgery, UConn Health, Farmington, CT
- Institute for Regenerative Engineering, UConn Health, Farmington, CT
- Raymond and Beverly Sackler Center for Biomedical, Biological, Physical and Engineering Sciences, UConn Health, Farmington, CT
| | - Ohan S. Manoukian
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT
| | - Xiaojun Yu
- Department of Chemistry, Chemical Biology and Biomedical Engineering, Stevens Institute of Technology, Hoboken, NJ
| | | | - Sangamesh G. Kumbar
- Department of Orthopaedic Surgery, UConn Health, Farmington, CT
- Institute for Regenerative Engineering, UConn Health, Farmington, CT
- Raymond and Beverly Sackler Center for Biomedical, Biological, Physical and Engineering Sciences, UConn Health, Farmington, CT
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT
| |
Collapse
|
25
|
Leng Z, He X, Li H, Wang D, Cao K. Olfactory ensheathing cell transplantation for spinal cord injury: An 18-year bibliometric analysis based on the Web of Science. Neural Regen Res 2014; 8:1286-96. [PMID: 25206423 PMCID: PMC4107648 DOI: 10.3969/j.issn.1673-5374.2013.14.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2012] [Accepted: 02/22/2013] [Indexed: 11/18/2022] Open
Abstract
OBJECTIVE Olfactory ensheathing cell (OEC) transplantation is a promising new approach for the treatment of spinal cord injury (SCI), and an increasing number of scientific publications are devoted to this treatment strategy. This bibliometric analysis was conducted to assess global research trends in OEC transplantation for SCI. DATA SOURCE All of the data in this study originate from the Web of Science maintained by the Institute for Scientific Information, USA, and includes SCI-EXPANDED, SSCI, A&HCI, CPCI-S, CPCI-SSH, BKCI-S, BKCI-SSH, CCR-EXPANDED and IC. The Institute for Scientific Information's Web of Science was searched using the keywords "olfactory ensheathing cells" or "OECs" or "olfactory ensheathing glia" or "OEG" or "olfactory ensheathing glial cells" or "OEGs" and "spinal cord injury" or "SCI" or "spinal injury" or "spinal transection" for literature published from January 1898 to May 2012. DATA SELECTION Original articles, reviews, proceedings papers and meeting abstracts, book chapters and editorial materials on OEC transplantation for SCI were included. Simultaneously, unpublished literature and literature for which manual information retrieval was required were excluded. MAIN OUTCOME MEASURES ALL SELECTED LITERATURES ADDRESSING OEC TRANSPLANTATION FOR SCI WERE EVALUATED IN THE FOLLOWING ASPECTS: publication year, document type, language, author, institution, times cited, Web of Science category, core source title, countries/territories and funding agency. RESULTS In the Web of Science published by the Institute for Scientific Information, the earliest literature record was in April, 1995. Four hundred and fourteen publications addressing OEC transplantation for SCI were added to the data library in the past 18 years, with an annually increasing trend. Of 415 records, 405 publications were in English. Two hundred and fifty-nine articles ranked first in the distribution of document type, followed by 141 reviews. Thirty articles and 20 reviews, cited more than 55 times by the date the publication data were downloaded by us, can be regarded as the most classical references. The journal Experimental Neurology published the most literature (32 records), followed by Glia. The United States had the most literature, followed by China. In addition, Yale University was the most productive institution in the world, while The Second Military Medical University contributed the most in China. The journal Experimental Neurology published the most OEC transplantation literature in the United States, while Neural Regeneration Research published the most in China. CONCLUSION This analysis provides insight into the current state and trends in OEC transplantation for SCI research. Furthermore, we anticipate that this analysis will help encourage international cooperation and teamwork on OEC transplantation for SCI to facilitate the development of more effective treatments for SCI.
Collapse
Affiliation(s)
- Zikuan Leng
- Department of Orthopedics, the Second Affiliated Hospital, Medical School of Xi'an Jiaotong University, Xi'an 710004, Shaanxi Province, China
| | - Xijing He
- Department of Orthopedics, the Second Affiliated Hospital, Medical School of Xi'an Jiaotong University, Xi'an 710004, Shaanxi Province, China
| | - Haopeng Li
- Department of Orthopedics, the Second Affiliated Hospital, Medical School of Xi'an Jiaotong University, Xi'an 710004, Shaanxi Province, China
| | - Dong Wang
- Department of Orthopedics, the Second Affiliated Hospital, Medical School of Xi'an Jiaotong University, Xi'an 710004, Shaanxi Province, China
| | - Kai Cao
- Department of Orthopedics, the Second Affiliated Hospital, Medical School of Xi'an Jiaotong University, Xi'an 710004, Shaanxi Province, China
| |
Collapse
|
26
|
Spedden E, Wiens MR, Demirel MC, Staii C. Effects of surface asymmetry on neuronal growth. PLoS One 2014; 9:e106709. [PMID: 25184796 PMCID: PMC4153665 DOI: 10.1371/journal.pone.0106709] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Accepted: 08/07/2014] [Indexed: 11/18/2022] Open
Abstract
Detailed knowledge of how the surface physical properties, such as mechanics, topography and texture influence axonal outgrowth and guidance is essential for understanding the processes that control neuron development, the formation of functional neuronal connections and nerve regeneration. Here we synthesize asymmetric surfaces with well-controlled topography and texture and perform a systematic experimental and theoretical investigation of axonal outgrowth on these substrates. We demonstrate unidirectional axonal bias imparted by the surface ratchet-based topography and quantify the topographical guidance cues that control neuronal growth. We describe the growth cone dynamics using a general stochastic model (Fokker-Planck formalism) and use this model to extract two key dynamical parameters: diffusion (cell motility) coefficient and asymmetric drift coefficient. The drift coefficient is identified with the torque caused by the asymmetric ratchet topography. We relate the observed directional bias in axonal outgrowth to cellular contact guidance behavior, which results in an increase in the cell-surface coupling with increased surface anisotropy. We also demonstrate that the disruption of cytoskeletal dynamics through application of Taxol (stabilizer of microtubules) and Blebbistatin (inhibitor of myosin II activity) greatly reduces the directional bias imparted by these asymmetric surfaces. These results provide new insight into the role played by topographical cues in neuronal growth and could lead to new methods for stimulating neuronal regeneration and the engineering of artificial neuronal tissue.
Collapse
Affiliation(s)
- Elise Spedden
- Department of Physics and Astronomy and Center for Nanoscopic Physics, Tufts University, Medford, Massachusetts, United States of America
| | - Matthew R. Wiens
- Department of Physics and Astronomy and Center for Nanoscopic Physics, Tufts University, Medford, Massachusetts, United States of America
| | - Melik C. Demirel
- Materials Research Institute and Department of Engineering Science, Pennsylvania State University, University Park, Pennsylvania, United States of America
| | - Cristian Staii
- Department of Physics and Astronomy and Center for Nanoscopic Physics, Tufts University, Medford, Massachusetts, United States of America
- * E-mail:
| |
Collapse
|
27
|
Li X, Liu X, Zhang N, Wen X. Engineering In Situ Cross-Linkable and Neurocompatible Hydrogels. J Neurotrauma 2014; 31:1431-8. [DOI: 10.1089/neu.2013.3215] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Affiliation(s)
- Xiaowei Li
- Translational Tissue Engineering Center, Whitaker Biomedical Engineering Institute, Johns Hopkins University, Baltimore, Maryland
| | - Xiaoyan Liu
- Institute for Engineering and Medicine, Virginia Commonwealth University, Richmond, Virginia
| | - Ning Zhang
- Institute for Engineering and Medicine, Virginia Commonwealth University, Richmond, Virginia
| | - Xuejun Wen
- Institute for Engineering and Medicine, Virginia Commonwealth University, Richmond, Virginia
- Institute for Biomedical Engineering and Nano Science (iNANO), Tongji Medical School, Tongji University, Shanghai, People's Republic of China
| |
Collapse
|
28
|
Rocha DN, Brites P, Fonseca C, Pêgo AP. Poly(trimethylene carbonate-co-ε-caprolactone) promotes axonal growth. PLoS One 2014; 9:e88593. [PMID: 24586346 PMCID: PMC3937290 DOI: 10.1371/journal.pone.0088593] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2013] [Accepted: 01/13/2014] [Indexed: 12/31/2022] Open
Abstract
Mammalian central nervous system (CNS) neurons do not regenerate after injury due to the inhibitory environment formed by the glial scar, largely constituted by myelin debris. The use of biomaterials to bridge the lesion area and the creation of an environment favoring axonal regeneration is an appealing approach, currently under investigation. This work aimed at assessing the suitability of three candidate polymers – poly(ε-caprolactone), poly(trimethylene carbonate-co-ε-caprolactone) (P(TMC-CL)) (11∶89 mol%) and poly(trimethylene carbonate) - with the final goal of using these materials in the development of conduits to promote spinal cord regeneration. Poly(L-lysine) (PLL) coated polymeric films were tested for neuronal cell adhesion and neurite outgrowth. At similar PLL film area coverage conditions, neuronal polarization and axonal elongation was significantly higher on P(TMC-CL) films. Furthermore, cortical neurons cultured on P(TMC-CL) were able to extend neurites even when seeded onto myelin. This effect was found to be mediated by the glycogen synthase kinase 3β (GSK3β) signaling pathway with impact on the collapsin response mediator protein 4 (CRMP4), suggesting that besides surface topography, nanomechanical properties were implicated in this process. The obtained results indicate P(TMC-CL) as a promising material for CNS regenerative applications as it promotes axonal growth, overcoming myelin inhibition.
Collapse
Affiliation(s)
- Daniela Nogueira Rocha
- INEB – Instituto de Engenharia Biomédica, Universidade do Porto, Porto, Portugal
- FEUP - Faculdade de Engenharia da Universidade do Porto, Porto, Portugal
| | - Pedro Brites
- Nerve Regeneration Group, IBMC – Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, Portugal
| | - Carlos Fonseca
- INEB – Instituto de Engenharia Biomédica, Universidade do Porto, Porto, Portugal
- FEUP - Faculdade de Engenharia da Universidade do Porto, Porto, Portugal
| | - Ana Paula Pêgo
- INEB – Instituto de Engenharia Biomédica, Universidade do Porto, Porto, Portugal
- FEUP - Faculdade de Engenharia da Universidade do Porto, Porto, Portugal
- ICBAS – Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal
- * E-mail:
| |
Collapse
|
29
|
Kilic C, Girotti A, Rodriguez-Cabello JC, Hasirci V. A collagen-based corneal stroma substitute with micro-designed architecture. Biomater Sci 2014; 2:318-29. [DOI: 10.1039/c3bm60194c] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
|
30
|
Carbon nanomaterials for nerve tissue stimulation and regeneration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 34:35-49. [PMID: 24268231 DOI: 10.1016/j.msec.2013.09.038] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2013] [Revised: 09/11/2013] [Accepted: 09/28/2013] [Indexed: 01/25/2023]
Abstract
Nanotechnology offers new perspectives in the field of innovative medicine, especially for reparation and regeneration of irreversibly damaged or diseased nerve tissues due to lack of effective self-repair mechanisms in the peripheral and central nervous systems (PNS and CNS, respectively) of the human body. Carbon nanomaterials, due to their unique physical, chemical and biological properties, are currently considered as promising candidates for applications in regenerative medicine. This chapter discusses the potential applications of various carbon nanomaterials including carbon nanotubes, nanofibers and graphene for regeneration and stimulation of nerve tissue, as well as in drug delivery systems for nerve disease therapy.
Collapse
|
31
|
Ribeiro-Samy S, Silva NA, Correlo VM, Fraga JS, Pinto L, Teixeira-Castro A, Leite-Almeida H, Almeida A, Gimble JM, Sousa N, Salgado AJ, Reis RL. Development and Characterization of a PHB-HV-based 3D Scaffold for a Tissue Engineering and Cell-therapy Combinatorial Approach for Spinal Cord Injury Regeneration. Macromol Biosci 2013; 13:1576-92. [DOI: 10.1002/mabi.201300178] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2013] [Revised: 06/26/2013] [Indexed: 11/08/2022]
Affiliation(s)
- Silvina Ribeiro-Samy
- 3B's Research Group - Biomaterials, Biodegradables and Biomimetics; Department of Polymer Engineering, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine; AvePark, 4806-909 Taipas, Guimarães Portugal
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences; University of Minho-Campus de Gualtar; 4710-057 Braga Portugal
- ICVS/3B's-Associate Laboratory; PT Government Associate Laboratory; Braga/Guimarães Portugal
| | - Nuno A. Silva
- 3B's Research Group - Biomaterials, Biodegradables and Biomimetics; Department of Polymer Engineering, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine; AvePark, 4806-909 Taipas, Guimarães Portugal
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences; University of Minho-Campus de Gualtar; 4710-057 Braga Portugal
- ICVS/3B's-Associate Laboratory; PT Government Associate Laboratory; Braga/Guimarães Portugal
| | - Vitor M. Correlo
- 3B's Research Group - Biomaterials, Biodegradables and Biomimetics; Department of Polymer Engineering, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine; AvePark, 4806-909 Taipas, Guimarães Portugal
- ICVS/3B's-Associate Laboratory; PT Government Associate Laboratory; Braga/Guimarães Portugal
| | - Joana S. Fraga
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences; University of Minho-Campus de Gualtar; 4710-057 Braga Portugal
- ICVS/3B's-Associate Laboratory; PT Government Associate Laboratory; Braga/Guimarães Portugal
| | - Luísa Pinto
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences; University of Minho-Campus de Gualtar; 4710-057 Braga Portugal
- ICVS/3B's-Associate Laboratory; PT Government Associate Laboratory; Braga/Guimarães Portugal
| | - Andreia Teixeira-Castro
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences; University of Minho-Campus de Gualtar; 4710-057 Braga Portugal
- ICVS/3B's-Associate Laboratory; PT Government Associate Laboratory; Braga/Guimarães Portugal
| | - Hugo Leite-Almeida
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences; University of Minho-Campus de Gualtar; 4710-057 Braga Portugal
- ICVS/3B's-Associate Laboratory; PT Government Associate Laboratory; Braga/Guimarães Portugal
| | - Armando Almeida
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences; University of Minho-Campus de Gualtar; 4710-057 Braga Portugal
- ICVS/3B's-Associate Laboratory; PT Government Associate Laboratory; Braga/Guimarães Portugal
| | - Jeffrey M. Gimble
- Pennington Biomedical Research Center; Louisiana State University System; Baton Rouge Louisiana USA
| | - Nuno Sousa
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences; University of Minho-Campus de Gualtar; 4710-057 Braga Portugal
- ICVS/3B's-Associate Laboratory; PT Government Associate Laboratory; Braga/Guimarães Portugal
| | - António J. Salgado
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences; University of Minho-Campus de Gualtar; 4710-057 Braga Portugal
- ICVS/3B's-Associate Laboratory; PT Government Associate Laboratory; Braga/Guimarães Portugal
| | - Rui L. Reis
- 3B's Research Group - Biomaterials, Biodegradables and Biomimetics; Department of Polymer Engineering, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine; AvePark, 4806-909 Taipas, Guimarães Portugal
- ICVS/3B's-Associate Laboratory; PT Government Associate Laboratory; Braga/Guimarães Portugal
| |
Collapse
|
32
|
Chung TW, Lai DM, Chen SD, Lin YI. Poly (ε-caprolactone) scaffolds functionalized by grafting NGF and GRGD promote growth and differentiation of PC12 cells. J Biomed Mater Res A 2013; 102:315-23. [DOI: 10.1002/jbm.a.34693] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2012] [Accepted: 02/22/2013] [Indexed: 01/19/2023]
Affiliation(s)
- Tze-Wen Chung
- Department of Chemical and Materials Engineering; National Yunlin University of Science and Technology; Dou-Liu Yun-Lin 640 Taiwan, ROC
| | - Dar-Ming Lai
- Department of Surgery; National Taiwan University Hospital; National Taiwan University College of Medicine; Taipei Taiwan, ROC
| | - Shin-Der Chen
- Department of Chemical and Materials Engineering; National Yunlin University of Science and Technology; Dou-Liu Yun-Lin 640 Taiwan, ROC
| | - Ya-I Lin
- Department of Chemical and Materials Engineering; National Yunlin University of Science and Technology; Dou-Liu Yun-Lin 640 Taiwan, ROC
| |
Collapse
|
33
|
Krishna V, Konakondla S, Nicholas J, Varma A, Kindy M, Wen X. Biomaterial-based interventions for neuronal regeneration and functional recovery in rodent model of spinal cord injury: a systematic review. J Spinal Cord Med 2013; 36:174-90. [PMID: 23809587 PMCID: PMC3654443 DOI: 10.1179/2045772313y.0000000095] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
CONTEXT There is considerable interest in translating laboratory advances in neuronal regeneration following spinal cord injury (SCI). A multimodality approach has been advocated for successful functional neuronal regeneration. With this goal in mind several biomaterials have been employed as neuronal bridges either to support cellular transplants, to release neurotrophic factors, or to do both. A systematic review of this literature is lacking. Such a review may provide insight to strategies with a high potential for further investigation and potential clinical application. OBJECTIVE To systematically review the design strategies and outcomes after biomaterial-based multimodal interventions for neuronal regeneration in rodent SCI model. To analyse functional outcomes after implantation of biomaterial-based multimodal interventions and to identify predictors of functional outcomes. METHODS A broad PubMed, CINHAL, and a manual search of relevant literature databases yielded data from 24 publications; 14 of these articles included functional outcome information. Studies reporting behavioral data in rat model of SCI and employing biodegradable polymer-based multimodal intervention were included. For behavioral recovery, studies using severe injury models (transection or severe clip compression (>16.9 g) or contusion (50 g/cm)) were categorized separately from those investigating partial injury models (hemisection or moderate-to-severe clip compression or contusion). RESULTS The cumulative mean improvements in Basso, Beattie, and Bresnahan scores after biomaterial-based interventions are 5.93 (95% CI = 2.41 - 9.45) and 4.44 (95% CI = 2.65 - 6.24) for transection and hemisection models, respectively. Factors associated with improved outcomes include the type of polymer used and a follow-up period greater than 6 weeks. CONCLUSION The functional improvement after implantation of biopolymer-based multimodal implants is modest. The relationship with neuronal regeneration and functional outcome, the effects of inflammation at the site of injury, the prolonged survival of supporting cells, the differentiation of stem cells, the effective delivery of neurotrophic factors, and longer follow-up periods are all topics for future elucidation. Future investigations should strive to further define specific factors associated with improved functional outcomes in clinically relevant models.
Collapse
Affiliation(s)
- Vibhor Krishna
- Medical University of South Carolina, Charleston, SC, USA.
| | | | - Joyce Nicholas
- Medical University of South Carolina, Charleston, SC, USA
| | - Abhay Varma
- Medical University of South Carolina, Charleston, SC, USA
| | - Mark Kindy
- Medical University of South Carolina, Charleston, SC, USA
| | - Xuejun Wen
- Medical University of South Carolina, Charleston, SC, USA; and Department of Bioengineering, Clemson University, SC, USA
| |
Collapse
|
34
|
Song JE, Kim MJ, Yoon H, Yoo H, Lee YJ, Kim HN, Lee D, Yuk SH, Khang G. Effect of hyaluronic acid (HA) in a HA/PLGA scaffold on annulus fibrosus regeneration: In vivo tests. Macromol Res 2013. [DOI: 10.1007/s13233-013-1137-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
|
35
|
Lee J, Lee S, Kim S, Kim K, Kim Y, Song J, Lee D, Khang G. Effect of Silk in Silk/PLGA Hybrid Films on Attachment and Proliferation of Human Aortic Endothelial Cells. POLYMER-KOREA 2013. [DOI: 10.7317/pk.2013.37.2.127] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
36
|
Oh SH, Kim JR, Kwon GB, Namgung U, Song KS, Lee JH. Effect of surface pore structure of nerve guide conduit on peripheral nerve regeneration. Tissue Eng Part C Methods 2013; 19:233-43. [PMID: 22871377 PMCID: PMC3557444 DOI: 10.1089/ten.tec.2012.0221] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2012] [Accepted: 08/03/2012] [Indexed: 11/13/2022] Open
Abstract
Polycaprolactone (PCL)/Pluronic F127 nerve guide conduits (NGCs) with different surface pore structures (nano-porous inner surface vs. micro-porous inner surface) but similar physical and chemical properties were fabricated by rolling the opposite side of asymmetrically porous PCL/F127 membranes. The effect of the pore structure on peripheral nerve regeneration through the NGCs was investigated using a sciatic nerve defect model of rats. The nerve fibers and tissues were shown to have regenerated along the longitudinal direction through the NGC with a nano-porous inner surface (Nanopore NGC), while they grew toward the porous wall of the NGC with a micro-porous inner surface (Micropore NGC) and, thus, their growth was restricted when compared with the Nanopore NGC, as investigated by immunohistochemical evaluations (by fluorescence microscopy with anti-neurofilament staining and Hoechst staining for growth pattern of nerve fibers), histological evaluations (by light microscopy with Meyer's modified trichrome staining and Toluidine blue staining and transmission electron microscopy for the regeneration of axon and myelin sheath), and FluoroGold retrograde tracing (for reconnection between proximal and distal stumps). The effect of nerve growth factor (NGF) immobilized on the pore surfaces of the NGCs on nerve regeneration was not so significant when compared with NGCs not containing immobilized NGF. The NGC system with different surface pore structures but the same chemical/physical properties seems to be a good tool that is used for elucidating the surface pore effect of NGCs on nerve regeneration.
Collapse
Affiliation(s)
- Se Heang Oh
- Department of Advanced Materials, Hannam University, Daejeon, South Korea
| | - Jin Rae Kim
- Department of Advanced Materials, Hannam University, Daejeon, South Korea
| | - Gu Birm Kwon
- Department of Oriental Medicine, Daejeon University, Daejeon, South Korea
| | - Uk Namgung
- Department of Oriental Medicine, Daejeon University, Daejeon, South Korea
| | - Kyu Sang Song
- Department of Pathology, School of Medicine, Chungnam National University, Daejeon, South Korea
| | - Jin Ho Lee
- Department of Advanced Materials, Hannam University, Daejeon, South Korea
| |
Collapse
|
37
|
|
38
|
Vago R. Beyond the skeleton: Cnidarian biomaterials as bioactive extracellular microenvironments for tissue engineering. Organogenesis 2012; 4:18-22. [PMID: 19279710 DOI: 10.4161/org.5843] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2008] [Accepted: 03/06/2008] [Indexed: 11/19/2022] Open
Affiliation(s)
- Razi Vago
- Department of Biotechnology Engineering; Ben-Gurion University of the Negev; Beer Sheva, Israel
| |
Collapse
|
39
|
Li X, Katsanevakis E, Liu X, Zhang N, Wen X. Engineering neural stem cell fates with hydrogel design for central nervous system regeneration. Prog Polym Sci 2012. [DOI: 10.1016/j.progpolymsci.2012.02.004] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
40
|
Hou T, Wu Y, Wang L, Liu Y, Zeng L, Li M, Long Z, Chen H, Li Y, Wang Z. Cellular Prostheses Fabricated with Motor Neurons Seeded in Self-Assembling Peptide Promotes Partial Functional Recovery After Spinal Cord Injury in Rats. Tissue Eng Part A 2012; 18:974-85. [PMID: 22115283 DOI: 10.1089/ten.tea.2011.0151] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Affiliation(s)
- Tianyong Hou
- State Key Laboratory of Trauma, Burns and Combined Injury, Department of Neurotrauma, Regeneration and Rehabilitation, Research Institute of Surgery, Daping Hospital, Third Military Medical University, Chongqing, P. R. China
- Department of Orthopaedics, Southwest Hospital, Third Military Medical University, Chongqing, P. R. China
| | - Yamin Wu
- State Key Laboratory of Trauma, Burns and Combined Injury, Department of Neurotrauma, Regeneration and Rehabilitation, Research Institute of Surgery, Daping Hospital, Third Military Medical University, Chongqing, P. R. China
| | - Li Wang
- State Key Laboratory of Trauma, Burns and Combined Injury, Department of Neurotrauma, Regeneration and Rehabilitation, Research Institute of Surgery, Daping Hospital, Third Military Medical University, Chongqing, P. R. China
| | - Yuan Liu
- State Key Laboratory of Trauma, Burns and Combined Injury, Department of Neurotrauma, Regeneration and Rehabilitation, Research Institute of Surgery, Daping Hospital, Third Military Medical University, Chongqing, P. R. China
| | - Lin Zeng
- State Key Laboratory of Trauma, Burns and Combined Injury, Department of Neurotrauma, Regeneration and Rehabilitation, Research Institute of Surgery, Daping Hospital, Third Military Medical University, Chongqing, P. R. China
| | - Min Li
- State Key Laboratory of Trauma, Burns and Combined Injury, Department of Neurotrauma, Regeneration and Rehabilitation, Research Institute of Surgery, Daping Hospital, Third Military Medical University, Chongqing, P. R. China
| | - Zaiyun Long
- State Key Laboratory of Trauma, Burns and Combined Injury, Department of Neurotrauma, Regeneration and Rehabilitation, Research Institute of Surgery, Daping Hospital, Third Military Medical University, Chongqing, P. R. China
| | - Hongsheng Chen
- State Key Laboratory of Trauma, Burns and Combined Injury, Department of Neurotrauma, Regeneration and Rehabilitation, Research Institute of Surgery, Daping Hospital, Third Military Medical University, Chongqing, P. R. China
| | - Yingyu Li
- State Key Laboratory of Trauma, Burns and Combined Injury, Department of Neurotrauma, Regeneration and Rehabilitation, Research Institute of Surgery, Daping Hospital, Third Military Medical University, Chongqing, P. R. China
| | - Zhengguo Wang
- State Key Laboratory of Trauma, Burns and Combined Injury, Department of Neurotrauma, Regeneration and Rehabilitation, Research Institute of Surgery, Daping Hospital, Third Military Medical University, Chongqing, P. R. China
| |
Collapse
|
41
|
Flaibani M, Elvassore N. Gas anti-solvent precipitation assisted salt leaching for generation of micro- and nano-porous wall in bio-polymeric 3D scaffolds. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2012; 32:1632-9. [PMID: 24364970 DOI: 10.1016/j.msec.2012.04.054] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2011] [Revised: 02/26/2012] [Accepted: 04/22/2012] [Indexed: 10/28/2022]
Abstract
The mass transport through biocompatible and biodegradable polymeric 3D porous scaffolds may be depleted by non-porous impermeable internal walls. As consequence the concentration of metabolites and growth factors within the scaffold may be heterogeneous leading to different cell fate depending on spatial cell location, and in some cases it may compromise cell survival. In this work, we fabricated polymeric scaffolds with micro- and nano-scale porosity by developing a new technique that couples two conventional scaffold production methods: solvent casting-salt leaching and gas antisolvent precipitation. 10-15 w/w solutions of a hyaluronic benzyl esters (HYAFF11) and poly-(lactic acid) (PLA) were used to fill packed beds of 0.177-0.425 mm NaCl crystals. The polymer precipitation in micro and nano-porous structures between the salt crystals was induced by high-pressure gas, then its flushing extracted the residual solvent. The salt was removed by water-wash. Morphological analysis by scanning electron microscopy showed a uniform porosity (~70%) and a high interconnectivity between porous. The polymeric walls were porous themselves counting for 30% of the total porosity. This wall porosity did not lead to a remarkable change in compressive modulus, deformation, and rupture pressure. Scaffold biocompatibility was tested with murine muscle cell line C2C12 for 4 and 7 days. Viability analysis and histology showed that micro- and nano-porous scaffolds are biocompatible and suitable for 3D cell culture promoting cell adhesion on the polymeric wall and allowing their proliferation in layers. Micro- and nano-scale porosities enhance cell migration and growth in the inner part of the scaffold.
Collapse
|
42
|
Kijeńska E, Prabhakaran MP, Swieszkowski W, Kurzydlowski KJ, Ramakrishna S. Electrospun bio-composite P(LLA-CL)/collagen I/collagen III scaffolds for nerve tissue engineering. J Biomed Mater Res B Appl Biomater 2012; 100:1093-102. [PMID: 22438340 DOI: 10.1002/jbm.b.32676] [Citation(s) in RCA: 110] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2011] [Revised: 11/21/2011] [Accepted: 01/02/2012] [Indexed: 12/23/2022]
Abstract
One of the biggest challenges in peripheral nerve tissue engineering is to create an artificial nerve graft that could mimic the extracellular matrix (ECM) and assist in nerve regeneration. Bio-composite nanofibrous scaffolds made from synthetic and natural polymeric blends provide suitable substrate for tissue engineering and it can be used as nerve guides eliminating the need of autologous nerve grafts. Nanotopography or orientation of the fibers within the scaffolds greatly influences the nerve cell morphology and outgrowth, and the alignment of the fibers ensures better contact guidance of the cells. In this study, poly (L-lactic acid)-co-poly(ε-caprolactone) or P(LLA-CL), collagen I and collagen III are utilized for the fabrication of nanofibers of different compositions and orientations (random and aligned) by electrospinning. The morphology, mechanical, physical, and chemical properties of the electrospun scaffolds along with their biocompatibility using C17.2 nerve stem cells are studied to identify the suitable material compositions and topography of the electrospun scaffolds required for peripheral nerve regeneration. Aligned P(LLA-CL)/collagen I/collagen III nanofibrous scaffolds with average diameter of 253 ± 102 nm were fabricated and characterized with a tensile strength of 11.59 ± 1.68 MPa. Cell proliferation studies showed 22% increase in cell proliferation on aligned P(LLA-CL)/collagen I/collagen III scaffolds compared with aligned pure P(LLA-CL) scaffolds. Results of our in vitro cell proliferation, cell-scaffold interaction, and neurofilament protein expression studies demonstrated that the electrospun aligned P(LLA-CL)/collagen I/collagen III nanofibrous scaffolds mimic more closely towards the ECM of nerve and have great potential as a substrate for accelerated regeneration of the nerve.
Collapse
Affiliation(s)
- Ewa Kijeńska
- Health Care and Energy Materials Laboratory, Nanoscience and Nanotechnology Initiative, Faculty of Engineering, National University of Singapore, Singapore
| | | | | | | | | |
Collapse
|
43
|
Cai L, Lu J, Sheen V, Wang S. Lubricated biodegradable polymer networks for regulating nerve cell behavior and fabricating nerve conduits with a compositional gradient. Biomacromolecules 2012; 13:358-68. [PMID: 22206477 PMCID: PMC3544368 DOI: 10.1021/bm201372u] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
We present a method of tuning surface chemistry and nerve cell behavior by photo-cross-linking methoxy poly(ethylene glycol) monoacrylate (mPEGA) with hydrophobic, semicrystalline poly(ε-caprolactone) diacrylate (PCLDA) at various weight compositions of mPEGA (ø(m)) from 2 to 30%. Improved surface wettability is achieved with corresponding decreases in friction, water contact angle, and capability of adsorbing proteins from cell culture media because of repulsive PEG chains tethered in the network. The responses of rat Schwann cell precursor line (SpL201), rat pheochromocytoma (PC12), and E14 mouse neural progenitor cells (NPCs) to the modified surfaces are evaluated. Nonmonotonic or parabolic dependence of cell attachment, spreading, proliferation, and differentiation on ø(m) is identified for these cell types with maximal values at ø(m) of 5-7%. In addition, NPCs demonstrate enhanced neuronal differentiated lineages on the mPEGA/PCLDA network at ø(m) of 5% with intermediate wettability and surface energy. This approach lays the foundation for fabricating heterogeneous nerve conduits with a compositional gradient along the wall thickness, which are able to promote nerve cell functions within the conduit while inhibiting cell attachment on the outer wall to prevent potential fibrous tissue formation following implantation.
Collapse
Affiliation(s)
- Lei Cai
- Department of Materials Science and Engineering, The University of Tennessee, Knoxville, TN 37996
| | - Jie Lu
- Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02115
| | - Volney Sheen
- Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02115
| | - Shanfeng Wang
- Department of Materials Science and Engineering, The University of Tennessee, Knoxville, TN 37996
- Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831
| |
Collapse
|
44
|
He L, Shi Y, Han Q, Zuo Q, Ramakrishna S, Xue W, Zhou L. Surface modification of electrospun nanofibrous scaffolds via polysaccharide–protein assembly multilayer for neurite outgrowth. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm32332j] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
|
45
|
Silva NA, Sousa RA, Pires AO, Sousa N, Salgado AJ, Reis RL. Interactions between Schwann and olfactory ensheathing cells with a starch/polycaprolactone scaffold aimed at spinal cord injury repair. J Biomed Mater Res A 2011; 100:470-6. [DOI: 10.1002/jbm.a.33289] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2011] [Revised: 09/15/2011] [Accepted: 09/26/2011] [Indexed: 11/10/2022]
|
46
|
Prabhakaran MP, Ghasemi-Mobarakeh L, Jin G, Ramakrishna S. Electrospun conducting polymer nanofibers and electrical stimulation of nerve stem cells. J Biosci Bioeng 2011; 112:501-7. [PMID: 21813321 DOI: 10.1016/j.jbiosc.2011.07.010] [Citation(s) in RCA: 163] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2011] [Revised: 06/23/2011] [Accepted: 07/09/2011] [Indexed: 10/17/2022]
Abstract
Tissue engineering of nerve grafts requires synergistic combination of scaffolds and techniques to promote and direct neurite outgrowth across the lesion for effective nerve regeneration. In this study, we fabricated a composite polymeric scaffold which is conductive in nature by electrospinning and further performed electrical stimulation of nerve stem cells seeded on the electrospun nanofibers. Poly-L-lactide (PLLA) was blended with polyaniline (PANi) at a ratio of 85:15 and electrospun to obtain PLLA/PANi nanofibers with fiber diameters of 195 ± 30 nm. The morphology, chemical and mechanical properties of the electrospun PLLA and PLLA/PANi scaffolds were carried out by scanning electron microscopy (SEM), X-ray photo electron spectroscopy (XPS) and tensile instrument. The electrospun PLLA/PANi fibers showed a conductance of 3 × 10⁻⁹ S by two-point probe measurement. In vitro electrical stimulation of the nerve stem cells cultured on PLLA/PANi scaffolds applied with an electric field of 100 mV/mm for a period of 60 min resulted in extended neurite outgrowth compared to the cells grown on non-stimulated scaffolds. Our studies further strengthen the implication of electrical stimulation of nerve stem cells on conducting polymeric scaffolds towards neurite elongation that could be effective for nerve tissue regeneration.
Collapse
Affiliation(s)
- Molamma P Prabhakaran
- Nanoscience and Nanotechnology Initiative, Health Care and Energy Materials Laboratory, Faculty of Engineering, 2 Engineering Drive 3, National University of Singapore, Singapore 117576.
| | | | | | | |
Collapse
|
47
|
Kang KN, Lee JY, Kim DY, Lee BN, Ahn HH, Lee B, Khang G, Park SR, Min BH, Kim JH, Lee HB, Kim MS. Regeneration of completely transected spinal cord using scaffold of poly(D,L-lactide-co-glycolide)/small intestinal submucosa seeded with rat bone marrow stem cells. Tissue Eng Part A 2011; 17:2143-52. [PMID: 21529281 DOI: 10.1089/ten.tea.2011.0122] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Using a complete spinal cord transection model, the present study employed a combinatorial strategy comprising rat bone marrow stem cells (rBMSCs) and polymer scaffolds to regenerate neurological function after spinal cord injury (SCI) of different lengths. SCI models with completely transected lesions were prepared by surgical removal of 1 mm (SC1) or 3 mm (SC3) lengths of spinal cord in the eighth-to-ninth spinal vertebrae, a procedure that resulted in bilateral hindlimb paralysis. A cylindrical poly(D,L-lactide-co-glycolide)/small intestinal submucosa scaffold 1 or 3 mm in length with or without rBMSCs was fitted into the completely transected lesion. Rats in SC1 and SC3 groups implanted with rBMSC-containing scaffolds received Basso-Beattie-Bresnahan scores for hindlimb locomotion of 15 and 8, respectively, compared with ∼3 for control rats in SC1-C and SC3-C groups implanted with scaffolds lacking rBMSCs. The amplitude of motor-evoked potentials recorded in the hindlimb area of the sensorimotor cortex after stimulation of the injured spinal cord averaged ∼100 μV in SC1-C and 10-50 μV in SC3-C groups at 4 weeks, and then declined to nearly zero at 8 weeks. In contrast, the amplitude of motor-evoked potentials increased from ∼300 to 350 μV between 4 and 8 weeks in SC1 rats and from ∼200 to ∼250 μV in SC3 rats. These results demonstrate functional recovery in rBMSC-transplanted rats, especially those with smaller defects. Immunohistochemically stained sections of the injury site showed clear evidence for axonal regeneration only in rBMSC-transplanted SC1 and SC3 models. In addition, rBMSCs were detected at the implanted site 4 and 8 weeks after transplantation, indicating cell survival in SCI. Collectively, our results indicate that therapeutic rBMSCs in a poly(D,L-lactide-co-glycolide)/small intestinal submucosa scaffold induced nerve regeneration in a complete spinal cord transection model and showed that functional recovery further depended on defect length.
Collapse
Affiliation(s)
- Kkot Nim Kang
- Department of Molecular Science and Technology, Ajou University, Suwon, Korea
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
48
|
Wang CY, Zhang KH, Fan CY, Mo XM, Ruan HJ, Li FF. Aligned natural-synthetic polyblend nanofibers for peripheral nerve regeneration. Acta Biomater 2011; 7:634-43. [PMID: 20849984 DOI: 10.1016/j.actbio.2010.09.011] [Citation(s) in RCA: 117] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2010] [Revised: 08/16/2010] [Accepted: 09/07/2010] [Indexed: 10/19/2022]
Abstract
Peripheral nerve regeneration remains a significant clinical challenge to researchers. Progress in the design of tissue engineering scaffolds provides an alternative approach for neural regeneration. In this study aligned silk fibroin (SF) blended poly(L-lactic acid-co-ε-caprolactone) (P(LLA-CL)) nanofibrous scaffolds were fabricated by electrospinning methods and then reeled into aligned nerve guidance conduits (NGC) to promote nerve regeneration. The aligned SF/P(LLA-CL) NGC was used as a bridge implanted across a 10mm defect in the sciatic nerve of rats and the outcome in terms of of regenerated nerve at 4 and 8 weeks was evaluated by a combination of electrophysiological assessment and histological and immunohistological analysis, as well as electron microscopy. The electrophysiological examination showed that functional recovery of the regenerated nerve in the SF/P(LLA-CL) NGC group was superior to that in the P(LLA-CL) NGC group. The morphological analysis also indicated that the regenerated nerve in the SF/P(LLA-CL) NGC was more mature. All the results demonstrated that the aligned SF/P(LLA-CL) NGC promoted peripheral nerve regeneration significantly better in comparison with the aligned P(LLA-CL) NGC, thus suggesting a potential application in nerve regeneration.
Collapse
|
49
|
|
50
|
Yin J, Coutris N, Huang Y. Role of Marangoni instability in fabrication of axially and internally grooved hollow fiber membranes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:16991-16999. [PMID: 20923184 DOI: 10.1021/la102173f] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Hollow fiber membranes (HFMs) are extensively used in different industrial applications. Under some controlled fabrication conditions, axially aligned grooves can be formed on the HFM inner surface during typical immersion precipitation-based phase inversion fabrication processes. Such grooved HFMs are found to be promising for nerve repair and regeneration. The axially aligned grooves appearing on the inner surface of the membrane are considered as hydrodynamic instability patterns. During the immersion precipitation process, a transfer of solvent takes place across the interface between a polymer solution and a nonsolvent. This solvent transfer induces gradients of interfacial tension that are considered to be the driving mechanism for Marangoni instability. The onset of the stationary instability is studied by means of a linear instability theory, and the critical and maximum wavenumbers are determined and discussed in terms of the dimensionless groups characterizing the system: viscosity ratio, diffusivity ratio, Schmidt number, crispation number, adsorption number, Marangoni number, and the polymer bulk concentration. A good agreement is found between the predicted wavelength of the most dangerous wave and the experimental groove width. Consequently, solutal Marangoni instability can explain the groove formation mechanism in HFM fabrication.
Collapse
Affiliation(s)
- Jun Yin
- Department of Mechanical Engineering, Clemson University, Clemson, South Carolina 29634-0921, USA
| | | | | |
Collapse
|