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Wang S, Wen X, Fan Z, Ding X, Wang Q, Liu Z, Yu W. Research advancements on nerve guide conduits for nerve injury repair. Rev Neurosci 2024; 35:627-637. [PMID: 38517315 DOI: 10.1515/revneuro-2023-0093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Accepted: 11/19/2023] [Indexed: 03/23/2024]
Abstract
Peripheral nerve injury (PNI) is one of the most serious causes of disability and loss of work capacity of younger individuals. Although PNS has a certain degree of regeneration, there are still challenges like disordered growth, neuroma formation, and incomplete regeneration. Regarding the management of PNI, conventional methods such as surgery, pharmacotherapy, and rehabilitative therapy. Treatment strategies vary depending on the severity of the injury. While for the long nerve defect, autologous nerve grafting is commonly recognized as the preferred surgical approach. Nevertheless, due to lack of donor sources, neurological deficits and the low regeneration efficiency of grafted nerves, nerve guide conduits (NGCs) are recognized as a future promising technology in recent years. This review provides a comprehensive overview of current treatments for PNI, and discusses NGCs from different perspectives, such as material, design, fabrication process, and composite function.
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Affiliation(s)
- Shoushuai Wang
- China-Japan Union Hospital of Jilin University, 126 Xiantai Street, Changchun City 130033, Jilin Province, China
| | - Xinggui Wen
- China-Japan Union Hospital of Jilin University, 126 Xiantai Street, Changchun City 130033, Jilin Province, China
| | - Zheyuan Fan
- China-Japan Union Hospital of Jilin University, 126 Xiantai Street, Changchun City 130033, Jilin Province, China
| | - Xiangdong Ding
- China-Japan Union Hospital of Jilin University, 126 Xiantai Street, Changchun City 130033, Jilin Province, China
| | - Qianqian Wang
- China-Japan Union Hospital of Jilin University, 126 Xiantai Street, Changchun City 130033, Jilin Province, China
| | - Zhongling Liu
- China-Japan Union Hospital of Jilin University, 126 Xiantai Street, Changchun City 130033, Jilin Province, China
| | - Wei Yu
- China-Japan Union Hospital of Jilin University, 126 Xiantai Street, Changchun City 130033, Jilin Province, China
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2
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Garg A, Alfatease A, Hani U, Haider N, Akbar MJ, Talath S, Angolkar M, Paramshetti S, Osmani RAM, Gundawar R. Drug eluting protein and polysaccharides-based biofunctionalized fabric textiles- pioneering a new frontier in tissue engineering: An extensive review. Int J Biol Macromol 2024; 268:131605. [PMID: 38641284 DOI: 10.1016/j.ijbiomac.2024.131605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 03/20/2024] [Accepted: 04/12/2024] [Indexed: 04/21/2024]
Abstract
In the ever-evolving landscape of tissue engineering, medicated biotextiles have emerged as a game-changer. These remarkable textiles have garnered significant attention for their ability to craft tissue scaffolds that closely mimic the properties of natural tissues. This comprehensive review delves into the realm of medicated protein and polysaccharide-based biotextiles, exploring a diverse array of fabric materials. We unravel the intricate web of fabrication methods, ranging from weft/warp knitting to plain/stain weaving and braiding, each lending its unique touch to the world of biotextiles creation. Fibre production techniques, such as melt spinning, wet/gel spinning, and multicomponent spinning, are demystified to shed light on the magic behind these ground-breaking textiles. The biotextiles thus crafted exhibit exceptional physical and chemical properties that hold immense promise in the field of tissue engineering (TE). Our review underscores the myriad applications of drug-eluting protein and polysaccharide-based textiles, including TE, tissue repair, regeneration, and wound healing. Additionally, we delve into commercially available products that harness the potential of medicated biotextiles, paving the way for a brighter future in healthcare and regenerative medicine. Step into the world of innovation with medicated biotextiles-where science meets the art of healing.
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Affiliation(s)
- Ankitha Garg
- Department of Pharmaceutics, JSS College of Pharmacy, JSS Academy of Higher Education and Research (JSSAHER), Mysuru 570015, Karnataka, India
| | - Adel Alfatease
- Department of Pharmaceutics, College of Pharmacy, King Khalid University, Abha 61421, Saudi Arabia.
| | - Umme Hani
- Department of Pharmaceutics, College of Pharmacy, King Khalid University, Abha 61421, Saudi Arabia.
| | - Nazima Haider
- Department of Pathology, College of Medicine, King Khalid University, Abha 61421, Saudi Arabia
| | - Mohammad J Akbar
- Department of Pharmaceutics, College of Clinical Pharmacy, Imam Abdulrahman Bin Faisal University, Dammam 34212, Saudi Arabia.
| | - Sirajunisa Talath
- Department of Pharmaceutical Chemistry, RAK College of Pharmacy, RAK Medical and Health Sciences University, Ras Al Khaimah 11172, United Arab Emirates.
| | - Mohit Angolkar
- Department of Pharmaceutics, JSS College of Pharmacy, JSS Academy of Higher Education and Research (JSSAHER), Mysuru 570015, Karnataka, India
| | - Sharanya Paramshetti
- Department of Pharmaceutics, JSS College of Pharmacy, JSS Academy of Higher Education and Research (JSSAHER), Mysuru 570015, Karnataka, India
| | - Riyaz Ali M Osmani
- Department of Pharmaceutics, JSS College of Pharmacy, JSS Academy of Higher Education and Research (JSSAHER), Mysuru 570015, Karnataka, India.
| | - Ravi Gundawar
- Department of Pharmaceutical Quality Assurance, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education (MAHE), Manipal 576104, Karnataka, India.
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3
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Namini MS, Daneshimehr F, Beheshtizadeh N, Mansouri V, Ai J, Jahromi HK, Ebrahimi-Barough S. Cell-free therapy based on extracellular vesicles: a promising therapeutic strategy for peripheral nerve injury. Stem Cell Res Ther 2023; 14:254. [PMID: 37726794 PMCID: PMC10510237 DOI: 10.1186/s13287-023-03467-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Accepted: 08/22/2023] [Indexed: 09/21/2023] Open
Abstract
Peripheral nerve injury (PNI) is one of the public health concerns that can result in a loss of sensory or motor function in the areas in which injured and non-injured nerves come together. Up until now, there has been no optimized therapy for complete nerve regeneration after PNI. Exosome-based therapies are an emerging and effective therapeutic strategy for promoting nerve regeneration and functional recovery. Exosomes, as natural extracellular vesicles, contain bioactive molecules for intracellular communications and nervous tissue function, which could overcome the challenges of cell-based therapies. Furthermore, the bioactivity and ability of exosomes to deliver various types of agents, such as proteins and microRNA, have made exosomes a potential approach for neurotherapeutics. However, the type of cell origin, dosage, and targeted delivery of exosomes still pose challenges for the clinical translation of exosome therapeutics. In this review, we have focused on Schwann cell and mesenchymal stem cell (MSC)-derived exosomes in nerve tissue regeneration. Also, we expressed the current understanding of MSC-derived exosomes related to nerve regeneration and provided insights for developing a cell-free MSC therapeutic strategy for nerve injury.
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Affiliation(s)
- Mojdeh Salehi Namini
- Department of Tissue Engineering, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
- Regenerative Medicine Group (REMED), Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | - Fatemeh Daneshimehr
- Department of Tissue Engineering, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Nima Beheshtizadeh
- Department of Tissue Engineering, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
- Regenerative Medicine Group (REMED), Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | - Vahid Mansouri
- Digestive Disease Research Institute, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Jafar Ai
- Department of Tissue Engineering, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Hossein Kargar Jahromi
- Research Center for Noncommunicable Diseases, Jahrom University of Medical Sciences, Jahrom, Iran.
| | - Somayeh Ebrahimi-Barough
- Department of Tissue Engineering, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran.
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4
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Xiong F, Wei S, Wu S, Jiang W, Li B, Xuan H, Xue Y, Yuan H. Aligned Electroactive Electrospun Fibrous Scaffolds for Peripheral Nerve Regeneration. ACS APPLIED MATERIALS & INTERFACES 2023; 15:41385-41402. [PMID: 37606339 DOI: 10.1021/acsami.3c09237] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/23/2023]
Abstract
Effective repair and functional recovery of large peripheral nerve deficits are urgent clinical needs. A biofunctional electroactive scaffold typically acts as a "bridge" for the repair of large nerve defects. In this study, we constructed a biomimetic piezoelectric and conductive aligned polypyrrole (PPy)/polydopamine (PDA)/poly-l-lactic acid (PLLA) electrospun fibrous scaffold to improve the hydrophilicity and cellular compatibility of PLLA and restore the weakened piezoelectric effect of PDA, which is beneficial in promoting Schwann cell differentiation and dorsal root ganglion neuronal extension and alignment. The aligned PPy/PDA/PLLA fibrous scaffold bridged the sciatic nerve of Sprague-Dawley rats with a 10 mm deficit, prevented autotomy, and promoted nerve regeneration and functional recovery, thereby activating the calcium and AMP-activated protein kinase signaling pathways. Therefore, electroactive fibrous scaffolds exhibit great potential for neural tissue regeneration.
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Affiliation(s)
- Feng Xiong
- School of Life Sciences, Nantong University, 226019 Nantong, China
| | - Shuo Wei
- School of Life Sciences, Nantong University, 226019 Nantong, China
| | - Shuyuan Wu
- School of Life Sciences, Nantong University, 226019 Nantong, China
| | - Wei Jiang
- School of Life Sciences, Nantong University, 226019 Nantong, China
| | - Biyun Li
- School of Life Sciences, Nantong University, 226019 Nantong, China
| | - Hongyun Xuan
- School of Life Sciences, Nantong University, 226019 Nantong, China
| | - Ye Xue
- School of Life Sciences, Nantong University, 226019 Nantong, China
| | - Huihua Yuan
- School of Life Sciences, Nantong University, 226019 Nantong, China
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5
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Zhang L, Sun R, Wang B, Lang Y, Chang MW. Polycaprolactone/multi-walled carbon nanotube nerve guidance conduits with tunable channels fabricated via novel extrusion-stretching method for peripheral nerve repair. INT J POLYM MATER PO 2023. [DOI: 10.1080/00914037.2023.2196626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
Affiliation(s)
- Longfei Zhang
- State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, Tianjin, China
- Tianjin Key Laboratory of Bio-electromagnetic and Neural Engineering, Hebei University of Technology, Tianjin, China
- Hebei Key Laboratory of Bioelectromagnetics and Neuroengineering, School of Health Sciences and Biomedical Engineering, Hebei University of Technology, Tianjin, China
| | - Renyuan Sun
- State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, Tianjin, China
- Tianjin Key Laboratory of Bio-electromagnetic and Neural Engineering, Hebei University of Technology, Tianjin, China
- Hebei Key Laboratory of Bioelectromagnetics and Neuroengineering, School of Health Sciences and Biomedical Engineering, Hebei University of Technology, Tianjin, China
| | - Baolin Wang
- State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, Tianjin, China
- Tianjin Key Laboratory of Bio-electromagnetic and Neural Engineering, Hebei University of Technology, Tianjin, China
- Hebei Key Laboratory of Bioelectromagnetics and Neuroengineering, School of Health Sciences and Biomedical Engineering, Hebei University of Technology, Tianjin, China
| | - Yuna Lang
- State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, Tianjin, China
- Tianjin Key Laboratory of Bio-electromagnetic and Neural Engineering, Hebei University of Technology, Tianjin, China
- Hebei Key Laboratory of Bioelectromagnetics and Neuroengineering, School of Health Sciences and Biomedical Engineering, Hebei University of Technology, Tianjin, China
| | - Ming-Wei Chang
- Nanotechnology and Integrated Bioengineering Centre, Jordanstown Campus, University of Ulster, Newtownabbey, United Kingdom
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6
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Gregory DA, Fricker ATR, Mitrev P, Ray M, Asare E, Sim D, Larpnimitchai S, Zhang Z, Ma J, Tetali SSV, Roy I. Additive Manufacturing of Polyhydroxyalkanoate-Based Blends Using Fused Deposition Modelling for the Development of Biomedical Devices. J Funct Biomater 2023; 14:jfb14010040. [PMID: 36662087 PMCID: PMC9865795 DOI: 10.3390/jfb14010040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 12/26/2022] [Accepted: 12/30/2022] [Indexed: 01/12/2023] Open
Abstract
In the last few decades Additive Manufacturing has advanced and is becoming important for biomedical applications. In this study we look at a variety of biomedical devices including, bone implants, tooth implants, osteochondral tissue repair patches, general tissue repair patches, nerve guidance conduits (NGCs) and coronary artery stents to which fused deposition modelling (FDM) can be applied. We have proposed CAD designs for these devices and employed a cost-effective 3D printer to fabricate proof-of-concept prototypes. We highlight issues with current CAD design and slicing and suggest optimisations of more complex designs targeted towards biomedical applications. We demonstrate the ability to print patient specific implants from real CT scans and reconstruct missing structures by means of mirroring and mesh mixing. A blend of Polyhydroxyalkanoates (PHAs), a family of biocompatible and bioresorbable natural polymers and Poly(L-lactic acid) (PLLA), a known bioresorbable medical polymer is used. Our characterisation of the PLA/PHA filament suggest that its tensile properties might be useful to applications such as stents, NGCs, and bone scaffolds. In addition to this, the proof-of-concept work for other applications shows that FDM is very useful for a large variety of other soft tissue applications, however other more elastomeric MCL-PHAs need to be used.
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7
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Osouli-Bostanabad K, Masalehdan T, Kapsa RMI, Quigley A, Lalatsa A, Bruggeman KF, Franks SJ, Williams RJ, Nisbet DR. Traction of 3D and 4D Printing in the Healthcare Industry: From Drug Delivery and Analysis to Regenerative Medicine. ACS Biomater Sci Eng 2022; 8:2764-2797. [PMID: 35696306 DOI: 10.1021/acsbiomaterials.2c00094] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Three-dimensional (3D) printing and 3D bioprinting are promising technologies for a broad range of healthcare applications from frontier regenerative medicine and tissue engineering therapies to pharmaceutical advancements yet must overcome the challenges of biocompatibility and resolution. Through comparison of traditional biofabrication methods with 3D (bio)printing, this review highlights the promise of 3D printing for the production of on-demand, personalized, and complex products that enhance the accessibility, effectiveness, and safety of drug therapies and delivery systems. In addition, this review describes the capacity of 3D bioprinting to fabricate patient-specific tissues and living cell systems (e.g., vascular networks, organs, muscles, and skeletal systems) as well as its applications in the delivery of cells and genes, microfluidics, and organ-on-chip constructs. This review summarizes how tailoring selected parameters (i.e., accurately selecting the appropriate printing method, materials, and printing parameters based on the desired application and behavior) can better facilitate the development of optimized 3D-printed products and how dynamic 4D-printed strategies (printing materials designed to change with time or stimulus) may be deployed to overcome many of the inherent limitations of conventional 3D-printed technologies. Comprehensive insights into a critical perspective of the future of 4D bioprinting, crucial requirements for 4D printing including the programmability of a material, multimaterial printing methods, and precise designs for meticulous transformations or even clinical applications are also given.
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Affiliation(s)
- Karim Osouli-Bostanabad
- Biomaterials, Bio-engineering and Nanomedicine (BioN) Lab, Institute of Biomedical and Biomolecular, Sciences, School of Pharmacy and Biomedical Sciences, University of Portsmouth, White Swan Road, Portsmouth PO1 2DT, United Kingdom
| | - Tahereh Masalehdan
- Department of Materials Engineering, Institute of Mechanical Engineering, University of Tabriz, Tabriz 51666-16444, Iran
| | - Robert M I Kapsa
- Biomedical and Electrical Engineering, School of Engineering, RMIT University, Melbourne, Victoria 3000, Australia.,Department of Medicine, St Vincent's Hospital Melbourne, University of Melbourne, Fitzroy, Victoria 3065, Australia
| | - Anita Quigley
- Biomedical and Electrical Engineering, School of Engineering, RMIT University, Melbourne, Victoria 3000, Australia.,Department of Medicine, St Vincent's Hospital Melbourne, University of Melbourne, Fitzroy, Victoria 3065, Australia
| | - Aikaterini Lalatsa
- Biomaterials, Bio-engineering and Nanomedicine (BioN) Lab, Institute of Biomedical and Biomolecular, Sciences, School of Pharmacy and Biomedical Sciences, University of Portsmouth, White Swan Road, Portsmouth PO1 2DT, United Kingdom
| | - Kiara F Bruggeman
- Laboratory of Advanced Biomaterials, Research School of Chemistry and the John Curtin School of Medical Research, The Australian National University, Canberra, Australian Capital Territory 2601, Australia.,Research School of Electrical, Energy and Materials Engineering, The Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Stephanie J Franks
- Laboratory of Advanced Biomaterials, Research School of Chemistry and the John Curtin School of Medical Research, The Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Richard J Williams
- Institute of Mental and Physical Health and Clinical Translation, School of Medicine, Deakin University, Waurn Ponds, Victoria 3216, Australia
| | - David R Nisbet
- Laboratory of Advanced Biomaterials, Research School of Chemistry and the John Curtin School of Medical Research, The Australian National University, Canberra, Australian Capital Territory 2601, Australia.,The Graeme Clark Institute, The University of Melbourne, Melbourne, Victoria 3010, Australia.,Department of Biomedical Engineering, Faculty of Engineering and Information Technology, The University of Melbourne, Melbourne, Victoria 3010, Australia
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Abdelbasset WK, Jasim SA, Sharma SK, Margiana R, Bokov DO, Obaid MA, Hussein BA, Lafta HA, Jasim SF, Mustafa YF. Alginate-Based Hydrogels and Tubes, as Biological Macromolecule-Based Platforms for Peripheral Nerve Tissue Engineering: A Review. Ann Biomed Eng 2022; 50:628-653. [PMID: 35446001 DOI: 10.1007/s10439-022-02955-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Accepted: 03/20/2022] [Indexed: 12/25/2022]
Abstract
Unlike the central nervous system, the peripheral nervous system (PNS) has an inherent capacity to regenerate following injury. However, in the case of large nerve defects where end-to-end cooptation of two nerve stumps is not tension-free, autologous nerve grafting is often utilized to bridge the nerve gaps. To address the challenges associated with autologous nerve grafting, neural guidance channels (NGCs) have been successfully translated into clinic. Furthermore, hydrogel-based drug delivery systems have been extensively studied for the repair of PNS injuries. There are numerous biomaterial options for the production of NGCs and hydrogels. Among different candidates, alginate has shown promising results in PNS tissue engineering. Alginate is a naturally occurring polysaccharide which is biocompatible, non-toxic, non-immunogenic, and possesses modifiable properties. In the current review, applications, challenges, and future perspectives of alginate-based NGCs and hydrogels in the repair of PNS injuries will be discussed.
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Affiliation(s)
- Walid Kamal Abdelbasset
- Department of Health and Rehabilitation Sciences, College of Applied Medical Sciences, Prince Sattam Bin Abdulaziz University, P.O. Box. 173, Al-Kharj, 11942, Saudi Arabia. .,Department of Physical Therapy, Kasr Al-Aini Hospital, Cairo University, Giza, 12613, Egypt.
| | - Saade Abdalkareem Jasim
- Medical Laboratory Techniques Department, Al-maarif University College, Al-anbar-Ramadi, Iraq
| | - Satish Kumar Sharma
- Pharmacology Department, Glocal School of Pharmacy, The Glocal University, Saharanpur, India
| | - Ria Margiana
- Department of Anatomy, Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia. .,Master's Programme Biomedical Sciences, Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia. .,Dr. Soetomo General Academic Hospital, Surabaya, Indonesia.
| | - Dmitry Olegovich Bokov
- Institute of Pharmacy, Sechenov First Moscow State Medical University, 8 Trubetskaya St., bldg. 2, Moscow, Russian Federation, 119991.,Laboratory of Food Chemistry, Federal Research Center of Nutrition, Biotechnology and Food Safety, 2/14 Ustyinsky pr, Moscow, Russian Federation, 109240
| | - Maithm A Obaid
- College of Pharmacy, National University of Science and Technology, Thi Qar, Iraq
| | | | | | - Sara Firas Jasim
- Department of Pharmaceutical Chemistry, College of Pharmacy, University of Mosul, Mosul, 41001, Iraq
| | - Yasser Fakri Mustafa
- Department of Pharmaceutical Chemistry, College of Pharmacy, University of Mosul, Mosul, 41001, Iraq
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Schwieger J, Frisch AS, Rau TS, Lenarz T, Hügl S, Scheper V. 3D Printed Cell Culture Chamber for Testing the Effect of Pump-Based Chronic Drug Delivery on Inner Ear Tissue. Biomolecules 2022; 12:biom12040589. [PMID: 35454178 PMCID: PMC9032916 DOI: 10.3390/biom12040589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 04/11/2022] [Accepted: 04/15/2022] [Indexed: 11/16/2022] Open
Abstract
Cochlear hair cell damage and spiral ganglion neuron (SGN) degeneration are the main causes of sensory neural hearing loss. Cochlear implants (CIs) can replace the function of the hair cells and stimulate the SGNs electrically. The condition of the SGNs and their spatial distance to the CI are key factors for CI-functionality. For a better performance, a high number of neurons and a closer contact to the electrode are intended. Neurotrophic factors are able to enhance SGN survival and neurite outgrowth, and thereby might optimize the electrode-nerve interaction. This would require chronic factor treatment, which is not yet established for the inner ear. Investigations on chronic drug delivery to SGNs could benefit from an appropriate in vitro model. Thus, an inner ear inspired Neurite Outgrowth Chamber (NOC), which allows the incorporation of a mini-osmotic pump for long-term drug delivery, was designed and three-dimensionally printed. The NOC’s function was validated using spiral ganglion explants treated with ciliary neurotrophic factor, neurotrophin-3, or control fluid released via pumps over two weeks. The NOC proved to be suitable for explant cultivation and observation of pump-based drug delivery over the examined period, with neurotrophin-3 significantly increasing neurite outgrowth compared to the other groups.
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Affiliation(s)
- Jana Schwieger
- Department of Otorhinolaryngology, Head and Neck Surgery, Hannover Medical School, 30625 Hannover, Germany; (A.S.F.); (T.S.R.); (T.L.); (S.H.); (V.S.)
- Lower Saxony Center for Biomedical Engineering, Implant Research and Development (NIFE), Stadtfelddamm 34, 30625 Hannover, Germany
- Cluster of Excellence “Hearing4all” EXC 1077/2, 30625 Hannover, Germany
- Correspondence: ; Tel.: +49-5115327262
| | - Anna Sophie Frisch
- Department of Otorhinolaryngology, Head and Neck Surgery, Hannover Medical School, 30625 Hannover, Germany; (A.S.F.); (T.S.R.); (T.L.); (S.H.); (V.S.)
- Lower Saxony Center for Biomedical Engineering, Implant Research and Development (NIFE), Stadtfelddamm 34, 30625 Hannover, Germany
| | - Thomas S. Rau
- Department of Otorhinolaryngology, Head and Neck Surgery, Hannover Medical School, 30625 Hannover, Germany; (A.S.F.); (T.S.R.); (T.L.); (S.H.); (V.S.)
- Lower Saxony Center for Biomedical Engineering, Implant Research and Development (NIFE), Stadtfelddamm 34, 30625 Hannover, Germany
- Cluster of Excellence “Hearing4all” EXC 1077/2, 30625 Hannover, Germany
| | - Thomas Lenarz
- Department of Otorhinolaryngology, Head and Neck Surgery, Hannover Medical School, 30625 Hannover, Germany; (A.S.F.); (T.S.R.); (T.L.); (S.H.); (V.S.)
- Lower Saxony Center for Biomedical Engineering, Implant Research and Development (NIFE), Stadtfelddamm 34, 30625 Hannover, Germany
- Cluster of Excellence “Hearing4all” EXC 1077/2, 30625 Hannover, Germany
| | - Silke Hügl
- Department of Otorhinolaryngology, Head and Neck Surgery, Hannover Medical School, 30625 Hannover, Germany; (A.S.F.); (T.S.R.); (T.L.); (S.H.); (V.S.)
- Lower Saxony Center for Biomedical Engineering, Implant Research and Development (NIFE), Stadtfelddamm 34, 30625 Hannover, Germany
- Cluster of Excellence “Hearing4all” EXC 1077/2, 30625 Hannover, Germany
| | - Verena Scheper
- Department of Otorhinolaryngology, Head and Neck Surgery, Hannover Medical School, 30625 Hannover, Germany; (A.S.F.); (T.S.R.); (T.L.); (S.H.); (V.S.)
- Lower Saxony Center for Biomedical Engineering, Implant Research and Development (NIFE), Stadtfelddamm 34, 30625 Hannover, Germany
- Cluster of Excellence “Hearing4all” EXC 1077/2, 30625 Hannover, Germany
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10
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Siriwardane ML, Derosa K, Collins G, Pfister BJ. Engineering Fiber-Based Nervous Tissue Constructs for Axon Regeneration. Cells Tissues Organs 2021; 210:105-117. [PMID: 34198287 DOI: 10.1159/000515549] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Accepted: 03/02/2021] [Indexed: 11/19/2022] Open
Abstract
Biomaterial-based scaffolds used in nerve conduits including channels for confining regenerating axons and 3-dimensional (3D) gels as substrates for growth have made improvements in models of nerve repair. Many biomaterial strategies, however, continue to fall short of autologous nerve grafts, which remain the current gold standard in repairing severe nerve lesions (<20 mm). Intraluminal nerve conduit fibers have also shown considerable promise in directing regenerating axons in vitro and in vivo and have gained increasing interest for nerve repair. It is unknown, however, how growing axons respond to a fiber when encountered in a 3D environment. In this study, we considered a construct consisting of a compliant collagen hydrogel matrix and a fiber component to assess contact-guided axon growth. We investigated preferential axon outgrowth on synthetic and natural polymer fibers by utilizing small-diameter microfibers of poly-L-lactic acid and type I collagen representing 2 different fiber stiffnesses. We found that axons growing freely in a 3D hydrogel culture preferentially attach, turn and follow fibers with outgrowth rates and distances that far exceed outgrowth in a hydrogel alone. Wet-spun type I collagen from rat tail tendon performed the best, associated with highly aligned and accelerated outgrowth. This study also evaluated the response of dorsal root ganglion neurons from adult rats to provide data more relevant to axon regenerative potential in nerve repair. We found that ECM treatments on fibers enhanced the regeneration of adult axons indicating that both the physical and biochemical presentation of the fibers are essential for enhancing axon guidance and growth.
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Affiliation(s)
- Mevan L Siriwardane
- Department of Biomedical Engineering, New Jersey Institute of Technology, Newark, New Jersey, USA
| | - Kathleen Derosa
- Department of Biomedical Engineering, New Jersey Institute of Technology, Newark, New Jersey, USA
| | - George Collins
- Department of Biomedical Engineering, New Jersey Institute of Technology, Newark, New Jersey, USA
| | - Bryan J Pfister
- Department of Biomedical Engineering, New Jersey Institute of Technology, Newark, New Jersey, USA
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11
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Doblado LR, Martínez-Ramos C, Pradas MM. Biomaterials for Neural Tissue Engineering. FRONTIERS IN NANOTECHNOLOGY 2021. [DOI: 10.3389/fnano.2021.643507] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The therapy of neural nerve injuries that involve the disruption of axonal pathways or axonal tracts has taken a new dimension with the development of tissue engineering techniques. When peripheral nerve injury (PNI), spinal cord injury (SCI), traumatic brain injury (TBI), or neurodegenerative disease occur, the intricate architecture undergoes alterations leading to growth inhibition and loss of guidance through large distance. To improve the limitations of purely cell-based therapies, the neural tissue engineering philosophy has emerged. Efforts are being made to produce an ideal scaffold based on synthetic and natural polymers that match the exact biological and mechanical properties of the tissue. Furthermore, through combining several components (biomaterials, cells, molecules), axonal regrowth is facilitated to obtain a functional recovery of the neural nerve diseases. The main objective of this review is to investigate the recent approaches and applications of neural tissue engineering approaches.
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12
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Fundamentals and Current Strategies for Peripheral Nerve Repair and Regeneration. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2020; 1249:173-201. [PMID: 32602098 DOI: 10.1007/978-981-15-3258-0_12] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A body of evidence indicates that peripheral nerves have an extraordinary yet limited capacity to regenerate after an injury. Peripheral nerve injuries have confounded professionals in this field, from neuroscientists to neurologists, plastic surgeons, and the scientific community. Despite all the efforts, full functional recovery is still seldom. The inadequate results attained with the "gold standard" autograft procedure still encourage a dynamic and energetic research around the world for establishing good performing tissue-engineered alternative grafts. Resourcing to nerve guidance conduits, a variety of methods have been experimentally used to bridge peripheral nerve gaps of limited size, up to 30-40 mm in length, in humans. Herein, we aim to summarize the fundamentals related to peripheral nerve anatomy and overview the challenges and scientific evidences related to peripheral nerve injury and repair mechanisms. The most relevant reports dealing with the use of both synthetic and natural-based biomaterials used in tissue engineering strategies when treatment of nerve injuries is envisioned are also discussed in depth, along with the state-of-the-art approaches in this field.
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Donsante A, Xue J, Poth KM, Hardcastle NS, Diniz B, O'Connor DM, Xia Y, Boulis NM. Controlling the Release of Neurotrophin-3 and Chondroitinase ABC Enhances the Efficacy of Nerve Guidance Conduits. Adv Healthc Mater 2020; 9:e2000200. [PMID: 32548984 PMCID: PMC7751830 DOI: 10.1002/adhm.202000200] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 04/30/2020] [Indexed: 12/16/2022]
Abstract
Nerve guidance conduits (NGCs) have the potential to replace autografts in repairing peripheral nerve injuries, but their efficacy still needs to be improved. The efficacy of NGCs is augmented by neurotrophic factors that promote axon growth and by enzymes capable of degrading molecules that inhibit axon growth. In the current study, two types of NGCs loaded with factors (both neurotrophin-3 and chondroitinase ABC) are constructed and their abilities to repair an 8 mm gap in the rat sciatic nerve are examined. The factors are encapsulated in microparticles made of a phase-change material (PCM) or collagen and then sandwiched between two layers of electrospun fibers. The use of PCM allows to achieve pulsed release of the factors upon irradiation with a near-infrared laser. The use of collagen enables slow, continuous release via diffusion. The efficacy is evaluated by measuring compound muscle action potentials (CMAP) in the gastrocnemius muscle and analyzing the nerve histology. Continuous release of the factors from collagen results in enhanced CMAP amplitude and increased axon counts in the distal nerve relative to the plain conduit. In contrast, pulsed release of the same factors from PCM shows a markedly adverse impact on the efficacy, possibly by inhibiting axon growth.
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Affiliation(s)
- Anthony Donsante
- Department of Neurosurgery, Emory University, Atlanta, GA, 30322, USA
| | - Jiajia Xue
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, 30332, USA
| | - Kelly M Poth
- Department of Neurosurgery, Emory University, Atlanta, GA, 30322, USA
| | | | - Bruna Diniz
- Department of Neurosurgery, Emory University, Atlanta, GA, 30322, USA
| | | | - Younan Xia
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, 30332, USA
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Nicholas M Boulis
- Department of Neurosurgery, Emory University, Atlanta, GA, 30322, USA
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Dalton PD, Woodfield TBF, Mironov V, Groll J. Advances in Hybrid Fabrication toward Hierarchical Tissue Constructs. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:1902953. [PMID: 32537395 PMCID: PMC7284200 DOI: 10.1002/advs.201902953] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 01/17/2020] [Indexed: 05/05/2023]
Abstract
The diversity of manufacturing processes used to fabricate 3D implants, scaffolds, and tissue constructs is continuously increasing. This growing number of different applicable fabrication technologies include electrospinning, melt electrowriting, volumetric-, extrusion-, and laser-based bioprinting, the Kenzan method, and magnetic and acoustic levitational bioassembly, to name a few. Each of these fabrication technologies feature specific advantages and limitations, so that a combination of different approaches opens new and otherwise unreachable opportunities for the fabrication of hierarchical cell-material constructs. Ongoing challenges such as vascularization, limited volume, and repeatability of tissue constructs at the resolution required to mimic natural tissue is most likely greater than what one manufacturing technology can overcome. Therefore, the combination of at least two different manufacturing technologies is seen as a clear and necessary emerging trend, especially within biofabrication. This hybrid approach allows more complex mechanics and discrete biomimetic structures to address mechanotransduction and chemotactic/haptotactic cues. Pioneering milestone papers in hybrid fabrication for biomedical purposes are presented and recent trends toward future manufacturing platforms are analyzed.
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Affiliation(s)
- Paul D. Dalton
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer InstituteUniversity of WürzburgWürzburg97070Germany
| | - Tim B. F. Woodfield
- Christchurch Regenerative Medicine and Tissue Engineering (CReaTE) GroupDepartment of Orthopaedic Surgery and Musculoskeletal MedicineCentre for Bioengineering & NanomedicineUniversity of Otago ChristchurchChristchurch8011New Zealand
- New Zealand Medical Technologies Centre of Research Excellence (MedTech CoRE)Auckland0600‐2699New Zealand
| | - Vladimir Mironov
- 3D Bioprinting SolutionsMoscow115409Russia
- Institute for Regenerative MedicineSechenov Medical UniversityMoscow119992Russia
| | - Jürgen Groll
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer InstituteUniversity of WürzburgWürzburg97070Germany
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15
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Vijayavenkataraman S. Nerve guide conduits for peripheral nerve injury repair: A review on design, materials and fabrication methods. Acta Biomater 2020; 106:54-69. [PMID: 32044456 DOI: 10.1016/j.actbio.2020.02.003] [Citation(s) in RCA: 233] [Impact Index Per Article: 58.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2019] [Revised: 02/04/2020] [Accepted: 02/04/2020] [Indexed: 12/19/2022]
Abstract
Peripheral nerves can sustain injuries due to loss of structure and/or function of peripheral nerves because of accident, trauma and other causes, which leads to partial or complete loss of sensory, motor, and autonomic functions and neuropathic pain. Even with the extensive knowledge on the pathophysiology and regeneration mechanisms of peripheral nerve injuries (PNI), reliable treatment methods that ensure full functional recovery are scant. Nerve autografting is the current gold standard for treatment of PNI. Given the limitations of autografts including donor site morbidity and limited supply, alternate treatment methods are being pursued by the researchers. Neural guide conduits (NGCs) are increasingly being considered as a potential alternative to nerve autografts. The anatomy of peripheral nerves, classification of PNI, and current treatment methods are briefly yet succinctly reviewed. A detailed review on the various designs of NGCs, the different materials used for making the NGCs, and the fabrication methods adopted is presented in this work. Much progress had been made in all the aspects of making an NGC, including the design, materials and fabrication techniques. The advent of advanced technologies such as additive manufacturing and 3D bioprinting could be beneficial in easing the production of patient-specific NGCs. NGCs with supporting cells or stem cells, NGCs loaded with neurotropic factors and drugs, and 4D printed NGCs are some of the futuristic areas of interest. STATEMENT OF SIGNIFICANCE: Neural guide conduits (NGCs) are increasingly being considered as a potential alternative to nerve autografts in the treatment of peripheral nerve injuries. A detailed review on the various designs of NGCs, the different materials used for making the NGCs, and the fabrication methods (including Additive Manufacturing) adopted is presented in this work.
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Affiliation(s)
- Sanjairaj Vijayavenkataraman
- Division of Engineering, New York University Abu Dhabi, UAE; Department of Mechanical and Aerospace Engineering, Tandon School of Engineering, New York University, NY, USA.
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16
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de Ru JA, M Thomeer HGX, Tijink BM, van Doormaal TPC. Neurocap Use for the Treatment of Iatrogenic Neuropathic Pain: Preliminary Operative Results in 3 Patients. EAR, NOSE & THROAT JOURNAL 2020; 100:830S-834S. [PMID: 32192381 DOI: 10.1177/0145561320912048] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Painful neuromas are a devastating condition that is notoriously difficult to treat. The large number of techniques that have been attempted suggest that no one technique is superior. Neuromas often occur in the extremities, but iatrogenically caused pain in the head and neck area has also been described. This article describes 3 consecutive patients diagnosed with traumatic neuroma who underwent transection of the causative nerve, followed by capping of the nerve stump with a Neurocap. With a follow-up of 7 to 24 months, our results show a marked reduction in the pain scores of all 3 patients. The preliminary results indicate that this technique might be a viable treatment option for patients with a suspected neuroma in the head and neck area.
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Affiliation(s)
- J Alexander de Ru
- Department of Otolaryngology, Head & Neck Surgery, 8124Central Military Hospital Utrecht, the Netherlands.,Department of Otolaryngology, Head & Neck Surgery, 8124University Medical Center Utrecht, the Netherlands
| | - Hans G X M Thomeer
- Department of Otolaryngology, Head & Neck Surgery, 8124University Medical Center Utrecht, the Netherlands
| | - Bernard M Tijink
- Department of Head and Neck Surgical Oncology, 8124University Medical Center Utrecht, the Netherlands
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Quigley AF, Cornock R, Mysore T, Foroughi J, Kita M, Razal JM, Crook J, Moulton SE, Wallace GG, Kapsa RMI. Wet-Spun Trojan Horse Cell Constructs for Engineering Muscle. Front Chem 2020; 8:18. [PMID: 32154210 PMCID: PMC7044405 DOI: 10.3389/fchem.2020.00018] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Accepted: 01/08/2020] [Indexed: 11/15/2022] Open
Abstract
Engineering of 3D regenerative skeletal muscle tissue constructs (skMTCs) using hydrogels containing muscle precursor cells (MPCs) is of potential benefit for repairing Volumetric Muscle Loss (VML) arising from trauma (e.g., road/industrial accident, war injury) or for restoration of functional muscle mass in disease (e.g., Muscular Dystrophy, muscle atrophy). Additive Biofabrication (AdBiofab) technologies make possible fabrication of 3D regenerative skMTCs that can be tailored to specific delivery requirements of VML or functional muscle restoration. Whilst 3D printing is useful for printing constructs of many tissue types, the necessity of a balanced compromise between cell type, required construct size and material/fabrication process cyto-compatibility can make the choice of 3D printing a secondary alternative to other biofabrication methods such as wet-spinning. Alternatively, wet-spinning is more amenable to formation of fibers rather than (small) layered 3D-Printed constructs. This study describes the fabrication of biosynthetic alginate fibers containing MPCs and their use for delivery of dystrophin-expressing cells to dystrophic muscle in the mdx mouse model of Duchenne Muscular Dystrophy (DMD) compared to poly(DL-lactic-co-glycolic acid) copolymer (PLA:PLGA) topically-seeded with myoblasts. In addition, this study introduces a novel method by which to create 3D layered wet-spun alginate skMTCs for bulk mass delivery of MPCs to VML lesions. As such, this work introduces the concept of "Trojan Horse" Fiber MTCs (TH-fMTCs) and 3d Mesh-MTCs (TH-mMTCs) for delivery of regenerative MPCs to diseased and damaged muscle, respectively.
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Affiliation(s)
- Anita F. Quigley
- ARC Centre for Electromaterials Science, Intelligent Polymer Research Institute, University of Wollongong, Fairy Meadow, NSW, Australia
- Centre for Clinical Neurosciences and Neurological Research, St. Vincent's Hospital Melbourne, Fitzroy, VIC, Australia
- School of Engineering, Royal Melbourne Institute of Technology, Melbourne, VIC, Australia
| | - Rhys Cornock
- ARC Centre for Electromaterials Science, Intelligent Polymer Research Institute, University of Wollongong, Fairy Meadow, NSW, Australia
| | - Tharun Mysore
- School of Medicine and Faculty of Health, Deakin University, Waurn Ponds, VIC, Australia
| | - Javad Foroughi
- ARC Centre for Electromaterials Science, Intelligent Polymer Research Institute, University of Wollongong, Fairy Meadow, NSW, Australia
| | - Magdalena Kita
- ARC Centre for Electromaterials Science, Intelligent Polymer Research Institute, University of Wollongong, Fairy Meadow, NSW, Australia
- Centre for Clinical Neurosciences and Neurological Research, St. Vincent's Hospital Melbourne, Fitzroy, VIC, Australia
| | - Joselito M. Razal
- Institute for Frontier Materials, Deakin University, Waurn Ponds, VIC, Australia
| | - Jeremy Crook
- ARC Centre for Electromaterials Science, Intelligent Polymer Research Institute, University of Wollongong, Fairy Meadow, NSW, Australia
- Illawarra Health and Medical Research Institute, University of Wollongong, Wollongong, NSW, Australia
- Department of Surgery, St Vincent's Hospital, The University of Melbourne, Fitzroy, VIC, Australia
| | - Simon E. Moulton
- Department of Biomedical Engineering, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, VIC, Australia
| | - Gordon G. Wallace
- ARC Centre for Electromaterials Science, Intelligent Polymer Research Institute, University of Wollongong, Fairy Meadow, NSW, Australia
| | - Robert M. I. Kapsa
- ARC Centre for Electromaterials Science, Intelligent Polymer Research Institute, University of Wollongong, Fairy Meadow, NSW, Australia
- Centre for Clinical Neurosciences and Neurological Research, St. Vincent's Hospital Melbourne, Fitzroy, VIC, Australia
- School of Engineering, Royal Melbourne Institute of Technology, Melbourne, VIC, Australia
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18
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Houshyar S, Pillai MM, Saha T, Sathish-Kumar G, Dekiwadia C, Sarker SR, Sivasubramanian R, Shanks RA, Bhattacharyya A. Three-dimensional directional nerve guide conduits fabricated by dopamine-functionalized conductive carbon nanofibre-based nanocomposite ink printing. RSC Adv 2020; 10:40351-40364. [PMID: 35520827 PMCID: PMC9057509 DOI: 10.1039/d0ra06556k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 12/10/2020] [Accepted: 10/05/2020] [Indexed: 12/20/2022] Open
Abstract
Directional growth induced by dopamine-functionalized CNF-based nanocomposite ink printing.
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Affiliation(s)
- Shadi Houshyar
- School of Engineering
- College of Science, Engineering and Health
- RMIT University
- Melbourne 3001
- Australia
| | - Mamatha M. Pillai
- Tissue Engineering Laboratory
- PSG Institute of Advanced Studies
- Coimbatore-641004
- India
| | - Tanushree Saha
- School of Engineering
- College of Science, Engineering and Health
- RMIT University
- Melbourne 3001
- Australia
| | - G. Sathish-Kumar
- Functional, Innovative and Smart Textiles
- PSG Institute of Advanced Studies
- Coimbatore-641004
- India
| | - Chaitali Dekiwadia
- RMIT Microscopy and Microanalysis Facility
- College of Science, Engineering and Health
- RMIT University
- Melbourne 3001
- Australia
| | - Satya Ranjan Sarker
- Department of Biotechnology and Genetic Engineering
- Jahangirnagar University
- Dhaka-1342
- Bangladesh
| | - R. Sivasubramanian
- Electrochemistry Laboratory
- PSG Institute of Advanced Studies
- Coimbatore- 641004
- India
| | - Robert A. Shanks
- School of Science
- College of Science, Engineering and Health
- RMIT University
- Melbourne 3000
- Australia
| | - Amitava Bhattacharyya
- Functional, Innovative and Smart Textiles
- PSG Institute of Advanced Studies
- Coimbatore-641004
- India
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19
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Carvalho CR, Oliveira JM, Reis RL. Modern Trends for Peripheral Nerve Repair and Regeneration: Beyond the Hollow Nerve Guidance Conduit. Front Bioeng Biotechnol 2019; 7:337. [PMID: 31824934 PMCID: PMC6882937 DOI: 10.3389/fbioe.2019.00337] [Citation(s) in RCA: 160] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Accepted: 10/30/2019] [Indexed: 12/13/2022] Open
Abstract
Peripheral nerve repair and regeneration remains among the greatest challenges in tissue engineering and regenerative medicine. Even though peripheral nerve injuries (PNIs) are capable of some degree of regeneration, frail recovery is seen even when the best microsurgical technique is applied. PNIs are known to be very incapacitating for the patient, due to the deprivation of motor and sensory abilities. Since there is no optimal solution for tackling this problem up to this day, the evolution in the field is constant, with innovative designs of advanced nerve guidance conduits (NGCs) being reported every day. As a basic concept, a NGC should act as a physical barrier from the external environment, concomitantly acting as physical guidance for the regenerative axons across the gap lesion. NGCs should also be able to retain the naturally released nerve growth factors secreted by the damaged nerve stumps, as well as reducing the invasion of scar tissue-forming fibroblasts to the injury site. Based on the neurobiological knowledge related to the events that succeed after a nerve injury, neuronal subsistence is subjected to the existence of an ideal environment of growth factors, hormones, cytokines, and extracellular matrix (ECM) factors. Therefore, it is known that multifunctional NGCs fabricated through combinatorial approaches are needed to improve the functional and clinical outcomes after PNIs. The present work overviews the current reports dealing with the several features that can be used to improve peripheral nerve regeneration (PNR), ranging from the simple use of hollow NGCs to tissue engineered intraluminal fillers, or to even more advanced strategies, comprising the molecular and gene therapies as well as cell-based therapies.
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Affiliation(s)
- Cristiana R. Carvalho
- 3B's Research Group, I3Bs – Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Guimarães, Portugal
- ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
- The Discoveries Centre for Regenerative and Precision Medicine, Headquarters at University of Minho, Avepark, Guimarães, Portugal
| | - Joaquim M. Oliveira
- 3B's Research Group, I3Bs – Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Guimarães, Portugal
- ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
- The Discoveries Centre for Regenerative and Precision Medicine, Headquarters at University of Minho, Avepark, Guimarães, Portugal
| | - Rui L. Reis
- 3B's Research Group, I3Bs – Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Guimarães, Portugal
- ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
- The Discoveries Centre for Regenerative and Precision Medicine, Headquarters at University of Minho, Avepark, Guimarães, Portugal
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20
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Nazeri N, Tajerian R, Arabpour Z, Hadjighassem MR, Gheibi N, Manouchehrabadi M, Ghanbari H. Bioinspired immobilization of carbon nanotubes on scaffolds for nerve regeneration. BIOINSPIRED BIOMIMETIC AND NANOBIOMATERIALS 2019. [DOI: 10.1680/jbibn.18.00033] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Niloofar Nazeri
- Department of Medical Nanotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Roksana Tajerian
- Department of Tissue Engineering and Applied Cell Sciences, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Zohreh Arabpour
- Department of Tissue Engineering and Applied Cell Sciences, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahmoud Reza Hadjighassem
- Department of Neuroscience, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Nematollah Gheibi
- Cellular and Molecular Research Center, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Mahboubeh Manouchehrabadi
- Department of Neuroscience, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Hossein Ghanbari
- Department of Medical Nanotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran; Medical Biomaterials Research Center, Tehran University of Medical Sciences, Tehran, Iran; Research Center for Advanced Technologies in Cardiovascular Medicine, Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran
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21
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Houshyar S, Bhattacharyya A, Shanks R. Peripheral Nerve Conduit: Materials and Structures. ACS Chem Neurosci 2019; 10:3349-3365. [PMID: 31273975 DOI: 10.1021/acschemneuro.9b00203] [Citation(s) in RCA: 97] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Peripheral nerve injuries (PNIs) are the most common injury types to affect the nervous system. Restoration of nerve function after PNI is a challenging medical issue. Extended gaps in transected peripheral nerves are only repaired using autologous nerve grafting. This technique, however, in which nerve tissue is harvested from a donor site and grafted onto a recipient site in the same body, has many limitations and disadvantages. Recent studies have revealed artificial nerve conduits as a promising alternative technique to substitute autologous nerves. This Review summarizes different types of artificial nerve grafts used to repair peripheral nerve injuries. These include synthetic and natural polymers with biological factors. Then, desirable properties of nerve guides are discussed based on their functionality and effectiveness. In the final part of this Review, fabrication methods and commercially available nerve guides are described.
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Affiliation(s)
- Shadi Houshyar
- School of Engineering, RMIT University, Melbourne, Victoria 3000, Australia
| | - Amitava Bhattacharyya
- Nanoscience and Technology, Department of Electronics and Communication, PSG College of Technology, Coimbatore − 641004, India
| | - Robert Shanks
- School of Science, RMIT University, Melbourne, Victoria 3000, Australia
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22
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Dong R, Liu Y, Yang Y, Wang H, Xu Y, Zhang Z. MSC-Derived Exosomes-Based Therapy for Peripheral Nerve Injury: A Novel Therapeutic Strategy. BIOMED RESEARCH INTERNATIONAL 2019; 2019:6458237. [PMID: 31531362 PMCID: PMC6719277 DOI: 10.1155/2019/6458237] [Citation(s) in RCA: 84] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Revised: 07/06/2019] [Accepted: 07/25/2019] [Indexed: 12/15/2022]
Abstract
Although significant advances have been made in synthetic nerve conduits and surgical techniques, complete regeneration following peripheral nerve injury (PNI) remains far from optimized. The repair of PNI is a highly heterogeneous process involving changes in Schwann cell phenotypes, the activation of macrophages, and the reconstruction of the vascular network. At present, the efficacy of MSC-based therapeutic strategies for PNI can be attributed to paracrine secretion. Exosomes, as a product of paracrine secretion, are considered to be an important regulatory mediator. Furthermore, accumulating evidence has demonstrated that exosomes from mesenchymal stem cells (MSCs) can shuttle bioactive components (proteins, lipids, mRNA, miRNA, lncRNA, circRNA, and DNA) that participate in almost all of the abovementioned processes. Thus, MSC exosomes may represent a novel therapeutic tool for PNI. In this review, we discuss the current understanding of MSC exosomes related to peripheral nerve repair and provide insights for developing a cell-free MSC therapeutic strategy for PNI.
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Affiliation(s)
- Ruiqi Dong
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, Henan 471023, China
| | - Yumei Liu
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, Henan 471023, China
| | - Yuxiang Yang
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, Henan 471023, China
| | - Haojie Wang
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, Henan 471023, China
| | - Yaolu Xu
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, Henan 471023, China
| | - Ziqiang Zhang
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, Henan 471023, China
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23
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Electrochemical Strategies for Titanium Implant Polymeric Coatings: The Why and How. COATINGS 2019. [DOI: 10.3390/coatings9040268] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Among the several strategies aimed at polymeric coatings deposition on titanium (Ti) and its alloys, metals commonly used in orthopaedic and orthodontic prosthesis, electrochemical approaches have gained growing interest, thanks to their high versatility. In this review, we will present two main electrochemical procedures to obtain stable, low cost and reliable polymeric coatings: electrochemical polymerization and electrophoretic deposition. Distinction should be made between bioinert films—having mainly the purpose of hindering corrosive processes of the underlying metal—and bioactive films—capable of improving biological compatibility, avoiding inflammation or implant-associated infection processes, and so forth. However, very often, these two objectives have been pursued and achieved contemporaneously. Indeed, the ideal coating is a system in which anti-corrosion, anti-infection and osseointegration can be obtained simultaneously. The ultimate goal of all these coatings is the better control of properties and processes occurring at the titanium interface, with a special emphasis on the cell-coating interactions. Finally, advantages and drawbacks of these electrochemical strategies have been highlighted in the concluding remarks.
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Zhang ZY, Yang J, Fan ZH, Wang DL, Wang YY, Zhang T, Yu LM, Yu CY. Fresh human amniotic membrane effectively promotes the repair of injured common peroneal nerve. Neural Regen Res 2019; 14:2199-2208. [PMID: 31397360 PMCID: PMC6788240 DOI: 10.4103/1673-5374.262596] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Suture and autologous nerve transplantation are the primary therapeutic measures for completely severed nerves. However, imbalances in the microenvironment and adhesion of surrounding tissues can affect the quality of nerve regeneration and repair. Previous studies have shown that human amniotic membrane can promote the healing of a variety of tissues. In this study, the right common peroneal nerve underwent a 5-mm transection in rats. Epineural nerve repair was performed using 10/0 non-absorbable surgical suture. The repair site was wrapped with a two-layer amniotic membrane with α-cyanoacrylate rapid medical adhesive after suture. Hindlimb motor function was assessed using footprint analysis. Conduction velocity of the common peroneal nerve was calculated by neural electrical stimulation. The retrograde axoplasmic transport of the common peroneal nerve was observed using fast blue BB salt retrograde fluorescent staining. Hematoxylin-eosin staining was used to detect the pathological changes of the common peroneal nerve sputum. The mRNA expression of axon regeneration-related neurotrophic factors and inhibitors was measured using real-time polymerase chain reaction. The results showed that the amniotic membrane significantly improved the function of the injured nerve; the toe spread function rapidly recovered, the nerve conduction velocity was restored, and the number of fast blue BB salt particles were increased in the spinal cord. The amniotic membrane also increased the recovery rate of the tibialis anterior muscle and improved the tissue structure of the muscle. Meanwhile, mRNA expression of nerve growth factor, growth associated protein-43, collapsin response mediator protein-2, and brain-derived neurotrophic factor recovered to near-normal levels, while Lingo-1 mRNA expression decreased significantly in spinal cord tissues. mRNA expression of glial-derived neurotrophic factor did not change significantly. Changes in mRNA levels were more significant in amniotic-membrane-wrapping-treated rats compared with model and nerve sutured rats. These results demonstrate that fresh amniotic membrane wrapping can promote the functional recovery of sutured common peroneal nerve via regulation of expression levels of neurotrophic factors and inhibitors associated with axonal regeneration. The study was approved by the Committee on Animal Research and Ethics at the Affiliate Hospital of Zunyi Medical University, China (approval No. 112) on December 1, 2017.
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Affiliation(s)
- Zhong-Yuan Zhang
- Key Laboratory of Cell Engineering in Guizhou Province, The Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou Province, China
| | - Jin Yang
- Key Laboratory of Cell Engineering in Guizhou Province, The Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou Province; Department of Thyroid and Breast Surgery, Fifth People's Hospital of Chengdu, Chengdu, Sichuan Province, China
| | - Zhen-Hai Fan
- Key Laboratory of Cell Engineering in Guizhou Province, The Affiliated Hospital of Zunyi Medical University; The Team of Scientific and Technological Innovation Talents on The Basic and Clinical Research of Amniotic Membrane and Bone Marrow Stem Cells in Guizhou Province, Zunyi, Guizhou Province, China
| | - Da-Li Wang
- Department of Burn and Plastic Surgery, The Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou Province, China
| | - Yu-Ying Wang
- Key Laboratory of Cell Engineering in Guizhou Province, The Affiliated Hospital of Zunyi Medical University; The Team of Scientific and Technological Innovation Talents on The Basic and Clinical Research of Amniotic Membrane and Bone Marrow Stem Cells in Guizhou Province, Zunyi, Guizhou Province, China
| | - Tao Zhang
- Key Laboratory of Cell Engineering in Guizhou Province, The Affiliated Hospital of Zunyi Medical University; The Team of Scientific and Technological Innovation Talents on The Basic and Clinical Research of Amniotic Membrane and Bone Marrow Stem Cells in Guizhou Province, Zunyi, Guizhou Province, China
| | - Li-Mei Yu
- Key Laboratory of Cell Engineering in Guizhou Province, The Affiliated Hospital of Zunyi Medical University; The Team of Scientific and Technological Innovation Talents on The Basic and Clinical Research of Amniotic Membrane and Bone Marrow Stem Cells in Guizhou Province, Zunyi, Guizhou Province, China
| | - Chang-Yin Yu
- Department of Neurology, The Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou Province, China
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25
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Duffy P, McMahon S, Wang X, Keaveney S, O'Cearbhaill ED, Quintana I, Rodríguez FJ, Wang W. Synthetic bioresorbable poly-α-hydroxyesters as peripheral nerve guidance conduits; a review of material properties, design strategies and their efficacy to date. Biomater Sci 2019; 7:4912-4943. [DOI: 10.1039/c9bm00246d] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Implantable tubular devices known as nerve guidance conduits (NGCs) have drawn considerable interest as an alternative to autografting in the repair of peripheral nerve injuries.
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Affiliation(s)
- Patrick Duffy
- The Charles Institute of Dermatology
- School of Medicine
- University College Dublin
- Dublin
- Ireland
| | - Seán McMahon
- Ashland Specialties Ireland Ltd
- Synergy Centre
- Dublin
- Ireland
| | - Xi Wang
- The Charles Institute of Dermatology
- School of Medicine
- University College Dublin
- Dublin
- Ireland
| | - Shane Keaveney
- School of Mechanical & Materials Engineering
- UCD Centre for Biomedical Engineering
- UCD Conway Institute of Biomolecular and Biomedical Research
- University College Dublin
- Dublin
| | - Eoin D. O'Cearbhaill
- School of Mechanical & Materials Engineering
- UCD Centre for Biomedical Engineering
- UCD Conway Institute of Biomolecular and Biomedical Research
- University College Dublin
- Dublin
| | - Iban Quintana
- IK4-Tekniker
- Surface Engineering and Materials Science Unit
- Eibar
- Spain
| | | | - Wenxin Wang
- The Charles Institute of Dermatology
- School of Medicine
- University College Dublin
- Dublin
- Ireland
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26
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Langert KA, Brey EM. Strategies for Targeted Delivery to the Peripheral Nerve. Front Neurosci 2018; 12:887. [PMID: 30542262 PMCID: PMC6277764 DOI: 10.3389/fnins.2018.00887] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Accepted: 11/13/2018] [Indexed: 12/17/2022] Open
Abstract
Delivery of compounds to the peripheral nervous system has the potential to be used as a treatment for a broad range of conditions and applications, including neuropathic pain, regional anesthesia, traumatic nerve injury, and inherited and inflammatory neuropathies. However, efficient delivery of therapeutic doses can be difficult to achieve due to peripheral neuroanatomy and the restrictiveness of the blood-nerve barrier. Depending on the underlying integrity of the blood-nerve barrier in the application at hand, several strategies can be employed to navigate the peripheral nerve architecture and facilitate targeted delivery to the peripheral nerve. This review describes different applications where targeted delivery to the peripheral nervous system is desired, the challenges that the blood-nerve barrier poses in each application, and bioengineering strategies that can facilitate delivery in each application.
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Affiliation(s)
- Kelly A Langert
- Department of Veterans Affairs, Research Service, Edward Hines, Jr. VA Hospital, Hines, IL, United States.,Department of Biomedical Engineering, Illinois Institute of Technology, Chicago, IL, United States
| | - Eric M Brey
- Audie L. Murphy VA Hospital, San Antonio, TX, United States.,Department of Biomedical Engineering, University of Texas at San Antonio, San Antonio, TX, United States
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27
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Dos Santos FP, Peruch T, Katami SJV, Martini APR, Crestani TA, Quintiliano K, Maurmann N, Sanches EF, Netto CA, Pranke P, de Souza Pagnussat A. Poly (lactide-co-glycolide) (PLGA) Scaffold Induces Short-term Nerve Regeneration and Functional Recovery Following Sciatic Nerve Transection in Rats. Neuroscience 2018; 396:94-107. [PMID: 30452974 DOI: 10.1016/j.neuroscience.2018.11.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 11/06/2018] [Accepted: 11/08/2018] [Indexed: 01/27/2023]
Abstract
Peripheral nerve injury is an important cause of incapability and has limited available treatment. Autologous donor nerve implant is the golden standard treatment, however, may cause secondary deficits. Stem cells show positive results in preclinical settings, preserving tissue and function. We tested the efficacy of stem cells derived from human exfoliated deciduous teeth seeded in poly (lactide-co-glycolide) scaffolds in sciatic nerve transection model. Seventy-two adult male Wistar rats had 7-mm nerve gap bridge using scaffolds with (or without) stem cells. Animals were randomly divided into: sham-operated; sham-operated without scaffold; sham-operated + scaffold + stem cells; sciatic transection + no treatment; sciatic transection + acellular scaffolds; sciatic transection + scaffold + stem cells. Sciatic Functional Index and Ladder Rung Walking tests were performed before (-1), 14 and 28 days after surgery. Morphometric nerve measurement and muscle weights were assessed. Scaffolds with stem cells improved function in Sciatic Functional Index. Acellular scaffold was effective, promoting functional recovery and nerve regeneration following nerve injury. Scaffolds provide better nerve regeneration and functional recovery after sciatic transection. Despite cell therapy promoting faster recovery after sciatic transection in the Sciatic Index Score, stem cells did not improve functional and morphological recovery after nerve injury. This is the first study testing the potential use of scaffolds combined with stem cells in the early stages after injury. Scaffolds with stem cells could accelerate nerve recovery and favor adjuvant therapies, evidencing the need for further studies to increase the knowledge about stem cells' mechanisms.
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Affiliation(s)
- Franciele Pereira Dos Santos
- Post-graduation Program in Health Sciences, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Brazil
| | - Thais Peruch
- Department of Physical Therapy, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Brazil
| | | | - Ana Paula Rodrigues Martini
- Post-graduation Program in Neuroscience, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Thayane Antoniolli Crestani
- Hematology and Stem Cell Laboratory, Faculty of Pharmacy, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil; Post-graduation Program in Neuroscience, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Kerlin Quintiliano
- Hematology and Stem Cell Laboratory, Faculty of Pharmacy, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil; Post-graduation Program in Neuroscience, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Natasha Maurmann
- Hematology and Stem Cell Laboratory, Faculty of Pharmacy, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil; Post-graduation Program in Physiology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Eduardo Farias Sanches
- Department of Biochemistry, Institute of Basic Health Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil; Post-graduation Program in Neuroscience, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.
| | - Carlos Alexandre Netto
- Department of Biochemistry, Institute of Basic Health Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Patricia Pranke
- Hematology and Stem Cell Laboratory, Faculty of Pharmacy, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil; Post-graduation Program in Physiology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil; Stem Cell Research Institute (SCRI), Porto Alegre, RS, Brazil
| | - Aline de Souza Pagnussat
- Post-graduation Program in Rehabilitation Sciences, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Brazil; Department of Physical Therapy, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Brazil; Post-graduation Program in Health Sciences, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Brazil
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28
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Vijayavenkataraman S, Zhang S, Thaharah S, Sriram G, Lu WF, Fuh JYH. Electrohydrodynamic Jet 3D Printed Nerve Guide Conduits (NGCs) for Peripheral Nerve Injury Repair. Polymers (Basel) 2018; 10:E753. [PMID: 30960678 PMCID: PMC6403768 DOI: 10.3390/polym10070753] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 07/05/2018] [Accepted: 07/06/2018] [Indexed: 12/31/2022] Open
Abstract
The prevalence of peripheral nerve injuries resulting in loss of motor function, sensory function, or both, is on the rise. Artificial Nerve Guide Conduits (NGCs) are considered an effective alternative treatment for autologous nerve grafts, which is the current gold-standard for treating peripheral nerve injuries. In this study, Polycaprolactone-based three-dimensional porous NGCs are fabricated using Electrohydrodynamic jet 3D printing (EHD-jetting) for the first time. The main advantage of this technique is that all the scaffold properties, namely fibre diameter, pore size, porosity, and fibre alignment, can be controlled by tuning the process parameters. In addition, EHD-jetting has the advantages of customizability, repeatability, and scalability. Scaffolds with five different pore sizes (125 to 550 μm) and porosities (65 to 88%) are fabricated and the effect of pore size on the mechanical properties is evaluated. In vitro degradation studies are carried out to investigate the degradation profile of the scaffolds and determine the influence of pore size on the degradation rate and mechanical properties at various degradation time points. Scaffolds with a pore size of 125 ± 15 μm meet the requirements of an optimal NGC structure with a porosity greater than 60%, mechanical properties closer to those of the native peripheral nerves, and an optimal degradation rate matching the nerve regeneration rate post-injury. The in vitro neural differentiation studies also corroborate the same results. Cell proliferation was highest in the scaffolds with a pore size of 125 ± 15 μm assessed by the PrestoBlue assay. The Reverse Transcription-Polymerase Chain Reaction (RT-PCR) results involving the three most important genes concerning neural differentiation, namely β3-tubulin, NF-H, and GAP-43, confirm that the scaffolds with a pore size of 125 ± 15 μm have the highest gene expression of all the other pore sizes and also outperform the electrospun Polycaprolactone (PCL) scaffold. The immunocytochemistry results, expressing the two important nerve proteins β3-tubulin and NF200, showed directional alignment of the neurite growth along the fibre direction in EHD-jet 3D printed scaffolds.
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Affiliation(s)
| | - Shuo Zhang
- Department of Mechanical Engineering, National University of Singapore (NUS), Singapore 117575, Singapore.
| | - Siti Thaharah
- Department of Mechanical Engineering, National University of Singapore (NUS), Singapore 117575, Singapore.
| | - Gopu Sriram
- Faculty of Dentistry, National University of Singapore, Singapore 119083, Singapore.
| | - Wen Feng Lu
- Department of Mechanical Engineering, National University of Singapore (NUS), Singapore 117575, Singapore.
| | - Jerry Ying Hsi Fuh
- Department of Mechanical Engineering, National University of Singapore (NUS), Singapore 117575, Singapore.
- NUS Research Institute, Suzhou Industry Park, Suzhou 215123, China.
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29
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Aijie C, Xuan L, Huimin L, Yanli Z, Yiyuan K, Yuqing L, Longquan S. Nanoscaffolds in promoting regeneration of the peripheral nervous system. Nanomedicine (Lond) 2018; 13:1067-1085. [PMID: 29790811 DOI: 10.2217/nnm-2017-0389] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The ability to surgically repair peripheral nerve injuries is urgently needed. However, traditional tissue engineering techniques, such as autologous nerve transplantation, have some limitations. Therefore, tissue engineered autologous nerve grafts have become a suitable choice for nerve repair. Novel tissue engineering techniques derived from nanostructured conduits have been shown to be superior to other successful functional neurological structures with different scaffolds in terms of providing the required structures and properties. Additionally, different biomaterials and growth factors have been added to nerve scaffolds to produce unique biological effects that promote nerve regeneration and functional recovery. This review summarizes the application of different nanoscaffolds in peripheral nerve repair and further analyzes how the nanoscaffolds promote peripheral nerve regeneration.
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Affiliation(s)
- Chen Aijie
- Nanfang Hospital, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou, Guangdong 510515, China
- Guangdong Provincial Key Laboratory of Construction & Detection in Tissue Engineering, Guangzhou 510515, China
| | - Lai Xuan
- Nanfang Hospital, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou, Guangdong 510515, China
| | - Liang Huimin
- Nanfang Hospital, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou, Guangdong 510515, China
| | - Zhang Yanli
- Nanfang Hospital, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou, Guangdong 510515, China
| | - Kang Yiyuan
- Nanfang Hospital, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou, Guangdong 510515, China
| | - Lin Yuqing
- Nanfang Hospital, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou, Guangdong 510515, China
| | - Shao Longquan
- Nanfang Hospital, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou, Guangdong 510515, China
- Guangdong Provincial Key Laboratory of Construction & Detection in Tissue Engineering, Guangzhou 510515, China
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30
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Limongi T, Rocchi A, Cesca F, Tan H, Miele E, Giugni A, Orlando M, Perrone Donnorso M, Perozziello G, Benfenati F, Di Fabrizio E. Delivery of Brain-Derived Neurotrophic Factor by 3D Biocompatible Polymeric Scaffolds for Neural Tissue Engineering and Neuronal Regeneration. Mol Neurobiol 2018; 55:8788-8798. [PMID: 29600349 DOI: 10.1007/s12035-018-1022-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Accepted: 03/16/2018] [Indexed: 01/07/2023]
Abstract
Biopolymers are increasingly employed for neuroscience applications as scaffolds to drive and promote neural regrowth, thanks to their ability to mediate the upload and subsequent release of active molecules and drugs. Synthetic degradable polymers are characterized by different responses ranging from tunable distension or shrinkage to total dissolution, depending on the function they are designed for. In this paper we present a biocompatible microfabricated poly-ε-caprolactone (PCL) scaffold for primary neuron growth and maturation that has been optimized for the in vitro controlled release of brain-derived neurotrophic factor (BDNF). We demonstrate that the designed morphology confers to these devices an enhanced drug delivery capability with respect to monolithic unstructured supports. After incubation with BDNF, micropillared PCL devices progressively release the neurotrophin over 21 days in vitro. Moreover, the bioactivity of released BDNF is confirmed using primary neuronal cultures, where it mediates a consistent activation of BDNF signaling cascades, increased synaptic density, and neuronal survival. These results provide the proof-of-principle on the fabrication process of micropatterned PCL devices, which represent a promising therapeutic option to enhance neuronal regeneration after lesion and for neural tissue engineering and prosthetics.
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Affiliation(s)
- T Limongi
- SMILEs Lab, Physical Science and Engineering (PSE) and Biological and Environmental Science and Engineering (BESE) Divisions, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Kingdom of Saudi Arabia
| | - A Rocchi
- Center for Synaptic Neuroscience and Technology, Istituto Italiano di Tecnologia, Largo Rosanna Benzi 10, 16132, Genoa, Italy
| | - F Cesca
- Center for Synaptic Neuroscience and Technology, Istituto Italiano di Tecnologia, Largo Rosanna Benzi 10, 16132, Genoa, Italy
| | - H Tan
- Analytical Core Lab, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Kingdom of Saudi Arabia
| | - E Miele
- Nanostructures Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genoa, Italy.,Centre for BioImaging Sciences, Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, Singapore, 117543, Singapore
| | - A Giugni
- SMILEs Lab, Physical Science and Engineering (PSE) and Biological and Environmental Science and Engineering (BESE) Divisions, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Kingdom of Saudi Arabia
| | - M Orlando
- Center for Synaptic Neuroscience and Technology, Istituto Italiano di Tecnologia, Largo Rosanna Benzi 10, 16132, Genoa, Italy.,Department of Neurophysiology, NeuroCure Excellence Cluster, Charité Universitäts Medizin, Charitéplatz 1, 10117, Berlin, Germany
| | - M Perrone Donnorso
- Nanostructures Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genoa, Italy
| | - G Perozziello
- Laboratory of Nanotechnology BioNEM Department of Experimental and Clinical Medicine, University "Magna Graecia" of Catanzaro, Viale Europa, Catanzaro, Italy
| | - Fabio Benfenati
- Center for Synaptic Neuroscience and Technology, Istituto Italiano di Tecnologia, Largo Rosanna Benzi 10, 16132, Genoa, Italy.
| | - Enzo Di Fabrizio
- SMILEs Lab, Physical Science and Engineering (PSE) and Biological and Environmental Science and Engineering (BESE) Divisions, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Kingdom of Saudi Arabia.
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31
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López-Cebral R, Silva-Correia J, Reis RL, Silva TH, Oliveira JM. Peripheral Nerve Injury: Current Challenges, Conventional Treatment Approaches, and New Trends in Biomaterials-Based Regenerative Strategies. ACS Biomater Sci Eng 2017; 3:3098-3122. [DOI: 10.1021/acsbiomaterials.7b00655] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- R. López-Cebral
- 3Bs Research Group, Biomaterials, Biodegradables and Biomimetics, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, University of Minho, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal
- ICVS/3Bs, PT Government Associate Laboratory, University of Minho, Braga/Guimarães, Portugal
| | - J. Silva-Correia
- 3Bs Research Group, Biomaterials, Biodegradables and Biomimetics, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, University of Minho, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal
- ICVS/3Bs, PT Government Associate Laboratory, University of Minho, Braga/Guimarães, Portugal
| | - R. L. Reis
- 3Bs Research Group, Biomaterials, Biodegradables and Biomimetics, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, University of Minho, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal
- ICVS/3Bs, PT Government Associate Laboratory, University of Minho, Braga/Guimarães, Portugal
| | - T. H. Silva
- 3Bs Research Group, Biomaterials, Biodegradables and Biomimetics, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, University of Minho, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal
- ICVS/3Bs, PT Government Associate Laboratory, University of Minho, Braga/Guimarães, Portugal
| | - J. M. Oliveira
- 3Bs Research Group, Biomaterials, Biodegradables and Biomimetics, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, University of Minho, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal
- ICVS/3Bs, PT Government Associate Laboratory, University of Minho, Braga/Guimarães, Portugal
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32
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Repairing sciatic nerve injury with an EPO-loaded nerve conduit and sandwiched-in strategy of transplanting mesenchymal stem cells. Biomaterials 2017; 142:90-100. [DOI: 10.1016/j.biomaterials.2017.06.024] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Revised: 06/09/2017] [Accepted: 06/19/2017] [Indexed: 12/14/2022]
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33
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Pyatin VF, Kolsanov AV, Shirolapov IV. Recent medical techniques for peripheral nerve repair: Clinico-physiological advantages of artificial nerve guidance conduits. ADVANCES IN GERONTOLOGY 2017. [DOI: 10.1134/s2079057017020126] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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34
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Gan L, Zhao L, Zhao Y, Li K, Tong Z, Yi L, Wang X, Li Y, Tian W, He X, Zhao M, Li Y, Chen Y. Cellulose/soy protein composite-based nerve guidance conduits with designed microstructure for peripheral nerve regeneration. J Neural Eng 2016; 13:056019. [DOI: 10.1088/1741-2560/13/5/056019] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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35
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Approaches to Peripheral Nerve Repair: Generations of Biomaterial Conduits Yielding to Replacing Autologous Nerve Grafts in Craniomaxillofacial Surgery. BIOMED RESEARCH INTERNATIONAL 2016; 2016:3856262. [PMID: 27556032 PMCID: PMC4983313 DOI: 10.1155/2016/3856262] [Citation(s) in RCA: 119] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Accepted: 06/29/2016] [Indexed: 01/09/2023]
Abstract
Peripheral nerve injury is a common clinical entity, which may arise due to traumatic, tumorous, or even iatrogenic injury in craniomaxillofacial surgery. Despite advances in biomaterials and techniques over the past several decades, reconstruction of nerve gaps remains a challenge. Autografts are the gold standard for nerve reconstruction. Using autografts, there is donor site morbidity, subsequent sensory deficit, and potential for neuroma development and infection. Moreover, the need for a second surgical site and limited availability of donor nerves remain a challenge. Thus, increasing efforts have been directed to develop artificial nerve guidance conduits (ANCs) as new methods to replace autografts in the future. Various synthetic conduit materials have been tested in vitro and in vivo, and several first- and second-generation conduits are FDA approved and available for purchase, while third-generation conduits still remain in experimental stages. This paper reviews the current treatment options, summarizes the published literature, and assesses future prospects for the repair of peripheral nerve injury in craniomaxillofacial surgery with a particular focus on facial nerve regeneration.
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36
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Huang L, Xu F, Guo B, Ma J, Zhao J. Morphological study of dynamic culture of thermosensitive collagen hydrogel in constructing tissue engineering complex. Bioengineered 2016; 7:266-73. [PMID: 27459597 DOI: 10.1080/21655979.2016.1197741] [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: 10/21/2022] Open
Abstract
ABSTACT The purpose of this study is to research the morphologies and functional characteristics of the cell-scaffold complex in vitro constructed under dynamic culture conditions. BMSCs were isolated from the long bones of Fischer344 rats, and performed in vitro amplification to the third generation as seed cells, together with thermosensitive collagen hydrogel (TCH) as cell adhesion matrix, and poly-L-lactic acid (PLLA) as scaffold, to construct cell-scaffold complex. The cell-scaffold complexes in the experiment group and the control group were then performed dynamic culture and static culture. After 7 d of in vitro culture, the complexes in the 2 groups were performed gross observation and SEM; meanwhile, the total DNA content in the complex was detected on D0,1,3, and 7 of culture. After cultured using these 2 ways, collagen could both wrap the PLLA scaffold, forming dense film-like structures on the PLLA surface. The total DNA contents in the cell-scaffold complex of the experiment group on D1,3, and 7 were significantly higher than the control group (P < 0.05). Compared with D0, the total DNA contents on D1,3, and 7 in both groups were gradually increased, but only the total DNA contents on D7 showed statistically significant difference than D0 (P < 0.05). TCH -PLLA fiber joint-constructed complex extracellular matrix had good biocompatibility, and dynamic culture could promote the distribution of BMSCs on the surface and inside the structure, thus promoting cell proliferation, so it could be used for the in vitro construction of tissue engineering complex.
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Affiliation(s)
- Lanfeng Huang
- a Department of Orthopedics , The Second Hospital of Jilin University , Changchun , China
| | - Feixiang Xu
- a Department of Orthopedics , The Second Hospital of Jilin University , Changchun , China
| | - Bin Guo
- a Department of Orthopedics , The Second Hospital of Jilin University , Changchun , China
| | - Jianchao Ma
- a Department of Orthopedics , The Second Hospital of Jilin University , Changchun , China
| | - Jinsong Zhao
- b Department of Ophthalmology , The Second Hospital of Jilin University , Changchun , China
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37
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Schirmer KSU, Gorkin R, Beirne S, Stewart E, Thompson BC, Quigley AF, Kapsa RMI, Wallace GG. Cell compatible encapsulation of filaments into 3D hydrogels. Biofabrication 2016; 8:025013. [DOI: 10.1088/1758-5090/8/2/025013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Vimal SK, Ahamad N, Katti DS. A simple method for fabrication of electrospun fibers with controlled degree of alignment having potential for nerve regeneration applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 63:616-27. [PMID: 27040257 DOI: 10.1016/j.msec.2016.03.008] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Revised: 01/29/2016] [Accepted: 03/01/2016] [Indexed: 02/04/2023]
Abstract
In peripheral nerve injuries where direct suturing of nerve endings is not feasible, nerve regeneration has been facilitated through the use of artificially aligned fibrous scaffolds that provide directional growth of neurons to bridge the gap. The degree of fiber alignment is crucial and can impact the directionality of cells in a fibrous scaffold. While there have been multiple approaches that have been used for controlling fiber alignment, however, they have been associated with a compromised control on other properties, such as diameter, morphology, curvature, and topology of fibers. Therefore, the present study demonstrates a modified electrospinning set-up, that enabled fabrication of electrospun fibers with controlled degree of alignment from non-aligned (NA), moderately aligned (MA, 75%) to highly aligned (HA, 95%) sub-micron fibers while keeping other physical properties unchanged. The results demonstrate that the aligned fibers (MA and HA) facilitated directional growth of human astrocytoma cells (U373), wherein the aspect ratio of cells was found to increase with an increase in degree of fibers alignment. In contrast to NA and MA fibers, the HA fibers showed improved contact guidance to U373 cells that was demonstrated by a significantly higher cell aspect ratio and nuclear aspect ratio. In conclusion, the present study demonstrated a modified electrospinning setup to fabricate differentially aligned fibrous scaffolds with the HA fibers showing potential for use in neural tissue engineering.
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Affiliation(s)
- Sunil Kumar Vimal
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh, India
| | - Nadim Ahamad
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh, India
| | - Dhirendra S Katti
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh, India.
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Aibibu D, Hild M, Wöltje M, Cherif C. Textile cell-free scaffolds for in situ tissue engineering applications. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2016; 27:63. [PMID: 26800694 PMCID: PMC4723636 DOI: 10.1007/s10856-015-5656-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Accepted: 12/20/2015] [Indexed: 05/12/2023]
Abstract
In this article, the benefits offered by micro-fibrous scaffold architectures fabricated by textile manufacturing techniques are discussed: How can established and novel fiber-processing techniques be exploited in order to generate templates matching the demands of the target cell niche? The problems related to the development of biomaterial fibers (especially from nature-derived materials) ready for textile manufacturing are addressed. Attention is also paid on how biological cues may be incorporated into micro-fibrous scaffold architectures by hybrid manufacturing approaches (e.g. nanofiber or hydrogel functionalization). After a critical review of exemplary recent research works on cell-free fiber based scaffolds for in situ TE, including clinical studies, we conclude that in order to make use of the whole range of favors which may be provided by engineered fibrous scaffold systems, there are four main issues which need to be addressed: (1) Logical combination of manufacturing techniques and materials. (2) Biomaterial fiber development. (3) Adaption of textile manufacturing techniques to the demands of scaffolds for regenerative medicine. (4) Incorporation of biological cues (e.g. stem cell homing factors).
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Affiliation(s)
- Dilbar Aibibu
- Technische Universität Dresden, Fakultät Maschinenwesen, Institut für Textilmaschinen und Textile Hochleistungswerkstofftechnik, 01062, Dresden, Germany.
| | - Martin Hild
- Technische Universität Dresden, Fakultät Maschinenwesen, Institut für Textilmaschinen und Textile Hochleistungswerkstofftechnik, 01062, Dresden, Germany
| | - Michael Wöltje
- Technische Universität Dresden, Fakultät Maschinenwesen, Institut für Textilmaschinen und Textile Hochleistungswerkstofftechnik, 01062, Dresden, Germany
| | - Chokri Cherif
- Technische Universität Dresden, Fakultät Maschinenwesen, Institut für Textilmaschinen und Textile Hochleistungswerkstofftechnik, 01062, Dresden, Germany
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40
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Schirmer KSU, Esrafilzadeh D, Thompson BC, Quigley AF, Kapsa RMI, Wallace GG. Conductive composite fibres from reduced graphene oxide and polypyrrole nanoparticles. J Mater Chem B 2016; 4:1142-1149. [DOI: 10.1039/c5tb02130h] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Wet–spun composite fibres from graphene and polypyrrole nanoparticles show appropriate mechanical properties, high electrical conductivity and good cytocompatibility.
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Affiliation(s)
- K. S. U. Schirmer
- ARC Centre for Electromaterials Science and Intelligent Polymer Research Institute
- AIIM Facility
- Innovation Campus
- University of Wollongong
- Australia
| | - D. Esrafilzadeh
- ARC Centre for Electromaterials Science and Intelligent Polymer Research Institute
- AIIM Facility
- Innovation Campus
- University of Wollongong
- Australia
| | - B. C. Thompson
- ARC Centre for Electromaterials Science and Intelligent Polymer Research Institute
- AIIM Facility
- Innovation Campus
- University of Wollongong
- Australia
| | - A. F. Quigley
- ARC Centre for Electromaterials Science and Intelligent Polymer Research Institute
- AIIM Facility
- Innovation Campus
- University of Wollongong
- Australia
| | - R. M. I. Kapsa
- ARC Centre for Electromaterials Science and Intelligent Polymer Research Institute
- AIIM Facility
- Innovation Campus
- University of Wollongong
- Australia
| | - G. G. Wallace
- ARC Centre for Electromaterials Science and Intelligent Polymer Research Institute
- AIIM Facility
- Innovation Campus
- University of Wollongong
- Australia
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41
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Jenkins PM, Laughter MR, Lee DJ, Lee YM, Freed CR, Park D. A nerve guidance conduit with topographical and biochemical cues: potential application using human neural stem cells. NANOSCALE RESEARCH LETTERS 2015; 10:972. [PMID: 26071111 PMCID: PMC4469602 DOI: 10.1186/s11671-015-0972-6] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Accepted: 06/03/2015] [Indexed: 05/26/2023]
Abstract
Despite major advances in the pathophysiological understanding of peripheral nerve damage, the treatment of nerve injuries still remains an unmet medical need. Nerve guidance conduits present a promising treatment option by providing a growth-permissive environment that 1) promotes neuronal cell survival and axon growth and 2) directs axonal extension. To this end, we designed an electrospun nerve guidance conduit using a blend of polyurea and poly-caprolactone with both biochemical and topographical cues. Biochemical cues were integrated into the conduit by functionalizing the polyurea with RGD to improve cell attachment. Topographical cues that resemble natural nerve tissue were incorporated by introducing intraluminal microchannels aligned with nanofibers. We determined that electrospinning the polymer solution across a two electrode system with dissolvable sucrose fibers produced a polymer conduit with the appropriate biomimetic properties. Human neural stem cells were cultured on the conduit to evaluate its ability to promote neuronal growth and axonal extension. The nerve guidance conduit was shown to enhance cell survival, migration, and guide neurite extension.
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Affiliation(s)
- Phillip M Jenkins
- />Department of Bioengineering, University of Colorado Denver Anschutz Medical Campus, 12800 E. 19th Avenue, Aurora, CO 80045 USA
| | - Melissa R Laughter
- />Department of Bioengineering, University of Colorado Denver Anschutz Medical Campus, 12800 E. 19th Avenue, Aurora, CO 80045 USA
| | - David J Lee
- />Department of Bioengineering, University of Colorado Denver Anschutz Medical Campus, 12800 E. 19th Avenue, Aurora, CO 80045 USA
| | - Young M Lee
- />Division of Clinical Pharmacology and Toxicology, University of Colorado School of Medicine, 12700 E. 19th Avenue, Aurora, CO 80045 USA
| | - Curt R Freed
- />Division of Clinical Pharmacology and Toxicology, University of Colorado School of Medicine, 12700 E. 19th Avenue, Aurora, CO 80045 USA
| | - Daewon Park
- />Department of Bioengineering, University of Colorado Denver Anschutz Medical Campus, 12800 E. 19th Avenue, Aurora, CO 80045 USA
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42
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Sugimura-Wakayama Y, Katagiri W, Osugi M, Kawai T, Ogata K, Sakaguchi K, Hibi H. Peripheral Nerve Regeneration by Secretomes of Stem Cells from Human Exfoliated Deciduous Teeth. Stem Cells Dev 2015; 24:2687-99. [PMID: 26154068 DOI: 10.1089/scd.2015.0104] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Peripheral nerve regeneration across nerve gaps is often suboptimal, with poor functional recovery. Stem cell transplantation-based regenerative therapy is a promising approach for axon regeneration and functional recovery of peripheral nerve injury; however, the mechanisms remain controversial and unclear. Recent studies suggest that transplanted stem cells promote tissue regeneration through a paracrine mechanism. We investigated the effects of conditioned media derived from stem cells from human exfoliated deciduous teeth (SHED-CM) on peripheral nerve regeneration. In vitro, SHED-CM-treated Schwann cells exhibited significantly increased proliferation, migration, and the expression of neuron-, extracellular matrix (ECM)-, and angiogenesis-related genes. SHED-CM stimulated neuritogenesis of dorsal root ganglia and increased cell viability. Similarly, SHED-CM enhanced tube formation in an angiogenesis assay. In vivo, a 10-mm rat sciatic nerve gap model was bridged by silicon conduits containing SHED-CM or serum-free Dulbecco's modified Eagle's medium. Light and electron microscopy confirmed that the number of myelinated axons and axon-to-fiber ratio (G-ratio) were significantly higher in the SHED-CM group at 12 weeks after nerve transection surgery. The sciatic functional index (SFI) and gastrocnemius (target muscle) wet weight ratio demonstrated functional recovery. Increased compound muscle action potentials and increased SFI in the SHED-CM group suggested sciatic nerve reinnervation of the target muscle and improved functional recovery. We also observed reduced muscle atrophy in the SHED-CM group. Thus, SHEDs may secrete various trophic factors that enhance peripheral nerve regeneration through multiple mechanisms. SHED-CM may therefore provide a novel therapy that creates a more desirable extracellular microenvironment for peripheral nerve regeneration.
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Affiliation(s)
- Yukiko Sugimura-Wakayama
- 1 Department of Oral and Maxillofacial Surgery, Nagoya University Graduate School of Medicine , Nagoya, Japan
| | - Wataru Katagiri
- 1 Department of Oral and Maxillofacial Surgery, Nagoya University Graduate School of Medicine , Nagoya, Japan
| | - Masashi Osugi
- 1 Department of Oral and Maxillofacial Surgery, Nagoya University Graduate School of Medicine , Nagoya, Japan
| | - Takamasa Kawai
- 1 Department of Oral and Maxillofacial Surgery, Nagoya University Graduate School of Medicine , Nagoya, Japan
| | - Kenichi Ogata
- 1 Department of Oral and Maxillofacial Surgery, Nagoya University Graduate School of Medicine , Nagoya, Japan .,2 Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University , Fukuoka, Japan
| | - Kohei Sakaguchi
- 1 Department of Oral and Maxillofacial Surgery, Nagoya University Graduate School of Medicine , Nagoya, Japan
| | - Hideharu Hibi
- 1 Department of Oral and Maxillofacial Surgery, Nagoya University Graduate School of Medicine , Nagoya, Japan
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43
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Hardy JG, Geissler SA, Aguilar D, Villancio-Wolter MK, Mouser DJ, Sukhavasi RC, Cornelison RC, Tien LW, Preda RC, Hayden RS, Chow JK, Nguy L, Kaplan DL, Schmidt CE. Instructive Conductive 3D Silk Foam-Based Bone Tissue Scaffolds Enable Electrical Stimulation of Stem Cells for Enhanced Osteogenic Differentiation. Macromol Biosci 2015; 15:1490-6. [PMID: 26033953 DOI: 10.1002/mabi.201500171] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Revised: 05/06/2015] [Indexed: 11/11/2022]
Abstract
Stimuli-responsive materials enabling the behavior of the cells that reside within them to be controlled are vital for the development of instructive tissue scaffolds for tissue engineering. Herein, we describe the preparation of conductive silk foam-based bone tissue scaffolds that enable the electrical stimulation of human mesenchymal stem cells (HMSCs) to enhance their differentiation toward osteogenic outcomes.
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Affiliation(s)
- John G Hardy
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, Florida, 32611, USA. .,Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas, 78712, USA. .,Department of Biomedical Engineering, Tufts University, Medford, Massachusetts, 02155, USA.
| | - Sydney A Geissler
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, Florida, 32611, USA.,Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas, 78712, USA
| | - David Aguilar
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas, 78712, USA
| | - Maria K Villancio-Wolter
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, Florida, 32611, USA
| | - David J Mouser
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas, 78712, USA
| | - Rushi C Sukhavasi
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas, 78712, USA
| | - R Chase Cornelison
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, Florida, 32611, USA.,Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas, 78712, USA
| | - Lee W Tien
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts, 02155, USA
| | - R Carmen Preda
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts, 02155, USA
| | - Rebecca S Hayden
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts, 02155, USA
| | - Jacqueline K Chow
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas, 78712, USA
| | - Lindsey Nguy
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas, 78712, USA
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts, 02155, USA.
| | - Christine E Schmidt
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, Florida, 32611, USA. .,Department of Biomedical Engineering, The University of Texas at Austin, Austin, Texas, 78712, USA.
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44
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Chen B, Niu SP, Wang ZY, Wang ZW, Deng JX, Zhang PX, Yin XF, Han N, Kou YH, Jiang BG. Local administration of icariin contributes to peripheral nerve regeneration and functional recovery. Neural Regen Res 2015; 10:84-9. [PMID: 25788925 PMCID: PMC4357123 DOI: 10.4103/1673-5374.150711] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/04/2014] [Indexed: 01/17/2023] Open
Abstract
Our previous study showed that systemic administration of the traditional Chinese medicine Epimedium extract promotes peripheral nerve regeneration. Here, we sought to explore the therapeutic effects of local administration of icariin, a major component of Epimedium extract, on peripheral nerve regeneration. A poly(lactic-co-glycolic acid) biological conduit sleeve was used to bridge a 5 mm right sciatic nerve defect in rats, and physiological saline, nerve growth factor, icariin suspension, or nerve growth factor-releasing microsphere suspension was injected into the defect. Twelve weeks later, sciatic nerve conduction velocity and the number of myelinated fibers were notably greater in the rats treated with icariin suspension or nerve growth factor-releasing microspheres than those that had received nerve growth factor or physiological saline. The effects of icariin suspension were similar to those of nerve growth factor-releasing microspheres. These data suggest that icariin acts as a nerve growth factor-releasing agent, and indicate that local application of icariin after spinal injury can promote peripheral nerve regeneration.
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Affiliation(s)
- Bo Chen
- Department of Trauma and Orthopedics, Peking University People's Hospital, Beijing, China
| | - Su-Ping Niu
- Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Zhi-Yong Wang
- Health Science Center, Peking University, Beijing, China
| | - Zhen-Wei Wang
- Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Jiu-Xu Deng
- Department of Trauma and Orthopedics, Peking University People's Hospital, Beijing, China
| | - Pei-Xun Zhang
- Department of Trauma and Orthopedics, Peking University People's Hospital, Beijing, China
| | - Xiao-Feng Yin
- Department of Trauma and Orthopedics, Peking University People's Hospital, Beijing, China
| | - Na Han
- Department of Trauma and Orthopedics, Peking University People's Hospital, Beijing, China
| | - Yu-Hui Kou
- Department of Trauma and Orthopedics, Peking University People's Hospital, Beijing, China
| | - Bao-Guo Jiang
- Department of Trauma and Orthopedics, Peking University People's Hospital, Beijing, China
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45
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Huang L, Li R, Liu W, Dai J, Du Z, Wang X, Ma J, Zhao J. Dynamic culture of a thermosensitive collagen hydrogel as an extracellular matrix improves the construction of tissue-engineered peripheral nerve. Neural Regen Res 2014; 9:1371-8. [PMID: 25221594 PMCID: PMC4160868 DOI: 10.4103/1673-5374.137590] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/25/2014] [Indexed: 12/15/2022] Open
Abstract
Tissue engineering technologies offer new treatment strategies for the repair of peripheral nerve injury, but cell loss between seeding and adhesion to the scaffold remains inevitable. A thermosensitive collagen hydrogel was used as an extracellular matrix in this study and combined with bone marrow mesenchymal stem cells to construct tissue-engineered peripheral nerve composites in vitro. Dynamic culture was performed at an oscillating frequency of 0.5 Hz and 35° swing angle above and below the horizontal plane. The results demonstrated that bone marrow mesenchymal stem cells formed membrane-like structures around the poly-L-lactic acid scaffolds and exhibited regular alignment on the composite surface. Collagen was used to fill in the pores, and seeded cells adhered onto the poly-L-lactic acid fibers. The DNA content of the bone marrow mesenchymal stem cells was higher in the composites constructed with a thermosensitive collagen hydrogel compared with that in collagen I scaffold controls. The cellular DNA content was also higher in the thermosensitive collagen hydrogel composites constructed with the thermosensitive collagen hydrogel in dynamic culture than that in static culture. These results indicate that tissue-engineered composites formed with thermosensitive collagen hydrogel in dynamic culture can maintain larger numbers of seeded cells by avoiding cell loss during the initial adhesion stage. Moreover, seeded cells were distributed throughout the material.
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Affiliation(s)
- Lanfeng Huang
- Department of Joint Surgery, Orthopedics Hospital of the Second Hospital of Jilin University, Changchun, Jilin Province, China
| | - Rui Li
- Centre of Hand & Foot Surgery and Reparative & Reconstructive Surgery, Orthopedics Hospital of the Second Hospital of Jilin University, Changchun, Jilin Province, China
| | - Wanguo Liu
- Department of Orthopedics Surgery, the Third Hospital of Jilin University, Changchun, Jilin Province, China
| | - Jin Dai
- Department of Joint Surgery, Orthopedics Hospital of the Second Hospital of Jilin University, Changchun, Jilin Province, China
| | - Zhenwu Du
- Institute of Orthopedics, the Second Hospital of Jilin University, Changchun, Jilin Province, China
| | - Xiaonan Wang
- Department of Joint Surgery, Orthopedics Hospital of the Second Hospital of Jilin University, Changchun, Jilin Province, China
| | - Jianchao Ma
- Department of Joint Surgery, Orthopedics Hospital of the Second Hospital of Jilin University, Changchun, Jilin Province, China
| | - Jinsong Zhao
- Department of Ophthalmology, the Second Hospital of Jilin University, Changchun, Jilin Province, China
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46
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Cui Y, Lu C, Meng D, Xiao Z, Hou X, Ding W, Kou D, Yao Y, Chen B, Zhang Z, Li J, Pan J, Dai J. Collagen scaffolds modified with CNTF and bFGF promote facial nerve regeneration in minipigs. Biomaterials 2014; 35:7819-27. [PMID: 24930851 DOI: 10.1016/j.biomaterials.2014.05.065] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Accepted: 05/22/2014] [Indexed: 12/20/2022]
Abstract
Most experiments of peripheral nerve repair after injury have been conducted in the rodent model but the translation of findings from rodent studies to clinical practice is needed partly because the nerve regeneration must occur over much longer distances in humans than in rodents. The reconstruction of long distance nerve injuries still represents a great challenge to surgeons who is engaged in peripheral nerve surgery. Here we used the functional nerve conduit (collagen scaffolds incorporated with neurocytokines CNTF and bFGF) to bridge a 35 mm long facial nerve gap in minipig models. At 6 months after surgery, electrophysiology assessment and histological examination were conducted to evaluate the regeneration of peripheral facial nerves. Based on functional and histological observations, the results indicated that the functional collagen scaffolds promoted nerve reconstruction. The number and arrangement of regenerated nerve fibers, myelination, and nerve function reconstruction was better in the CNTF + bFGF conduit group than the single factor CNTF or bFGF conduit group. The functional composite conduit, which exhibited favorable mechanical properties, may promote facial nerve regeneration in minipigs effectively.
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Affiliation(s)
- Yi Cui
- State key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, 3 Nanyitiao, Zhongguancun, Beijing 100190, China; Reproductive and Genetic Center of National Research Institute for Family Planning, Beijing 100081, China
| | - Chao Lu
- School of Stomatology, Capital Medical University, Beijing 10050, China
| | - Danqing Meng
- State key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, 3 Nanyitiao, Zhongguancun, Beijing 100190, China; Graduate School, Chinese Academy of Sciences, Beijing 100190, China
| | - Zhifeng Xiao
- State key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, 3 Nanyitiao, Zhongguancun, Beijing 100190, China
| | - Xianglin Hou
- State key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, 3 Nanyitiao, Zhongguancun, Beijing 100190, China
| | - Wenyong Ding
- Department of Biochemistry, Dalian Medical University, Dalian 116044, China
| | - Depeng Kou
- Department of Biochemistry, Dalian Medical University, Dalian 116044, China
| | - Yao Yao
- School of Stomatology, Capital Medical University, Beijing 10050, China
| | - Bing Chen
- State key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, 3 Nanyitiao, Zhongguancun, Beijing 100190, China
| | - Zhen Zhang
- School of Stomatology, Capital Medical University, Beijing 10050, China
| | - Jiayin Li
- State key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, 3 Nanyitiao, Zhongguancun, Beijing 100190, China
| | - Juli Pan
- School of Stomatology, Capital Medical University, Beijing 10050, China.
| | - Jianwu Dai
- State key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, 3 Nanyitiao, Zhongguancun, Beijing 100190, China.
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47
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Abstract
Nerve injury secondary to trauma, neurological disease or tumor excision presents a challenge for surgical reconstruction. Current practice for nerve repair involves autologous nerve transplantation, which is associated with significant donor-site morbidity and other complications. Previously artificial nerve conduits made from polycaprolactone, polyglycolic acid and collagen were approved by the FDA (USA) for nerve repair. More recently, there have been significant advances in nerve conduit design that better address the requirements of nerve regrowth. Innovations in materials science, nanotechnology, and biology open the way for the synthesis of new generation nerve repair conduits that address issues currently faced in nerve repair and regeneration. This review discusses recent innovations in this area, including the use of nanotechnology to improve the design of nerve conduits and to enhance nerve regeneration.
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48
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Piskin A, Altunkaynak BZ, Çitlak A, Sezgin H, Yazιcι O, Kaplan S. Immediate versus delayed primary nerve repair in the rabbit sciatic nerve. Neural Regen Res 2013; 8:3410-5. [PMID: 25206663 PMCID: PMC4146006 DOI: 10.3969/j.issn.1673-5374.2013.36.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Accepted: 11/23/2013] [Indexed: 11/18/2022] Open
Abstract
It is well known that peripheral nerve injury should be treated immediately in the clinic, but in some instances, repair can be delayed. This study investigated the effects of immediate versus delayed (3 days after injury) neurorrhaphy on repair of transected sciatic nerve in New Zealand rabbits using stereological, histomorphological and biomechanical methods. At 8 weeks after immediate and delayed neurorrhaphy, axon number and area in the sciatic nerve, myelin sheath and epineurium thickness, Schwann cell morphology, and the mechanical property of nerve fibers did not differ obviously. These results indicate that delayed neurorrhaphy do not produce any deleterious effect on sciatic nerve repair.
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Affiliation(s)
- Ahmet Piskin
- Department of Orthopedics and Traumatology, School of Medicine, Ondokuz Mayıs University, Samsun, Turkey
| | - Berrin Zühal Altunkaynak
- Department of Histology and Embryology, School of Medicine, Ondokuz Mayıs University, Samsun, Turkey
| | - Atilla Çitlak
- Department of Orthopedics and Traumatology, School of Medicine, Giresun University, Giresun, Turkey
| | - Hicabi Sezgin
- Department of Orthopedics and Traumatology, School of Medicine, Ondokuz Mayıs University, Samsun, Turkey
| | - Ozgür Yazιcι
- Department of Orthopedics and Traumatology, School of Medicine, Ondokuz Mayıs University, Samsun, Turkey
| | - Süleyman Kaplan
- Department of Histology and Embryology, School of Medicine, Ondokuz Mayıs University, Samsun, Turkey
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49
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Stoyanova II, van Wezel RJA, Rutten WLC. In vivo testing of a 3D bifurcating microchannel scaffold inducing separation of regenerating axon bundles in peripheral nerves. J Neural Eng 2013; 10:066018. [PMID: 24280623 DOI: 10.1088/1741-2560/10/6/066018] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Artificial nerve guidance channels enhance the regenerative effectiveness in an injured peripheral nerve but the existing design so far has been limited to basic straight tubes simply guiding the growth to bridge the gap. Hence, one of the goals in development of more effective neuroprostheses is to create bidirectional highly selective neuro-electronic interface between a prosthetic device and the severed nerve. A step towards improving selectivity for both recording and stimulation have been made with some recent in vitro studies which showed that three-dimensional (3D) bifurcating microchannels can separate neurites growing on a planar surface and bring them into contact with individual electrodes. Since the growing axons in vivo have the innate tendency to group in bundles surrounded by connective tissue, one of the big challenges in neuro-prosthetic interface design is how to overcome it. Therefore, we performed experiments with 3D bifurcating guidance scaffolds implanted in the sciatic nerve of rats to test if this new channel architecture could trigger separation pattern of ingrowth also in vivo. Our results showed that this new method enabled the re-growth of neurites into channels with gradually diminished width (80, 40 and 20 µm) and facilitated the separation of the axonal bundles with 91% success. It seems that the 3D bifurcating scaffold might contribute towards conveying detailed neural control and sensory feedback to users of prosthetic devices, and thus could improve the quality of their daily life.
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Affiliation(s)
- Irina I Stoyanova
- Neurotechnology Group, Biomedical Signals and Systems, Faculty of Electrical Engineering, Mathematics and Computer Sciences, Institute for Biomedical Engineering and Technical Medicine MIRA, University of Twente, Enschede, The Netherlands
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