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Lee MS, Jeon J, Park S, Lim J, Yang HS. Rationally designed bioactive milk-derived protein scaffolds enhanced new bone formation. Bioact Mater 2023; 20:368-380. [PMID: 35784638 PMCID: PMC9213433 DOI: 10.1016/j.bioactmat.2022.05.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 05/09/2022] [Accepted: 05/23/2022] [Indexed: 12/04/2022] Open
Abstract
Recently, a number of studies reported that casein was composed of various multifunctional bioactive peptides such as casein phosphopeptide and β-casochemotide-1 that bind calcium ions and induce macrophage chemotaxis, which is crucial for bone homeostasis and bone fracture repair by cytokines secreted in the process. We hypothesized that the effects of the multifunctional biopeptides in casein would contribute to improving bone regeneration. Thus, we designed a tissue engineering platform that consisted of casein and polyvinyl alcohol, which was a physical-crosslinked scaffold (milk-derived protein; MDP), via simple freeze-thaw cycles and performed surface modification using 3,4-dihydroxy-l-phenylalanine (DOPA), a mussel adhesive protein, for immobilizing adhesive proteins and cytokines for recruiting cells in vivo (MDP-DOPA). Both the MDP and MDP-DOPA groups proved indirectly contribution of macrophages migration as RAW 264.7 cells were highly migrated toward materials by contained bioactive peptides. We implanted MDP and MDP-DOPA in a mouse calvarial defect orthotopic model and evaluated whether MDP-DOPA showed much faster mineral deposition and higher bone density than that of the no-treatment and MDP groups. The MDP-DOPA group showed the accumulation of host M2 macrophages and mesenchymal stem cells (MSCs) around the scaffold, whereas MDP presented mostly M1 macrophages in the early stage. Bioactive peptide-containing scaffold was fabricated via simple freeze-thaw cycles, and subsequently, the surface was modified with adhesive protein. We confirmed that the multifunctional biopeptides regulated the migration of macrophages and enhanced osteogenic differentiation. The bioactive peptide-containing scaffold showed much faster and higher mineral deposition in vivo animal studies compared to the other groups.
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Affiliation(s)
- Min Suk Lee
- Department of Nanobiomedical Science & BK21 FOUR NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea
- Medical Laser Research Center, College of Medicine, Dankook University, Cheonan, 31116, Republic of Korea
| | - Jin Jeon
- Department of Nanobiomedical Science & BK21 FOUR NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea
| | - Sihyeon Park
- Department of Nanobiomedical Science & BK21 FOUR NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea
| | - Juhan Lim
- Department of Nanobiomedical Science & BK21 FOUR NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea
| | - Hee Seok Yang
- Department of Nanobiomedical Science & BK21 FOUR NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea
- Center for Bio-Medical Engineering Core-Facility, Dankook University, Cheonan, 31116, Republic of Korea
- Corresponding author. Department of Nanobiomedical Science & BK21 FOUR NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea.
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Yuan B, Zheng X, Wu ML, Yang Y, Chen JW, Gao HC, Liu J. Platelet-Rich Plasma Gel-Loaded Collagen/Chitosan Composite Film Accelerated Rat Sciatic Nerve Injury Repair. ACS OMEGA 2023; 8:2931-2941. [PMID: 36713745 PMCID: PMC9878625 DOI: 10.1021/acsomega.2c05351] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2022] [Accepted: 12/27/2022] [Indexed: 06/18/2023]
Abstract
Peripheral nerve injury (PNI) is a common clinical disease caused by severe limb trauma, congenital malformations, and tumor resection, which may lead to significant functional impairment and permanent disability. Nerve conduit as a method for treating peripheral nerve injury shows good application prospects. In this work, the COL/CS composite films with different mass ratios of 1:0, 1:1, and 1:3 were fabricated by combining physical doping. Physicochemical characterization results showed that the COL/CS composite films possessed good swelling properties, ideal mechanical properties, degradability and suitable hydrophilicity, which could meet the requirements of nerve tissue engineering. In vitro cell experiments showed that the loading of platelet-rich plasma (PRP) gel on the surface of COL/CS composite films could significantly improve the biocompatibility of films and promote the proliferation of Schwann cells. In addition, a rat model of sciatic nerve defect was constructed to evaluate the effect of COL/CS composite films on peripheral nerve repair and the results showed that COL/CS composite films loaded with PRP gel could promote nerve regeneration and functional recovery in rats with sciatic nerve injury, indicating that the combination of PRP gel with the COL/CS composite film would be a potential approach for the treatment of peripheral nerve injury.
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Affiliation(s)
- Bo Yuan
- Liaoning
Laboratory of Cancer Genomics and Epigenomics, College of Basic Medical
Sciences, Dalian Medical University, Dalian116044, China
| | - Xu Zheng
- Liaoning
Laboratory of Cancer Genomics and Epigenomics, College of Basic Medical
Sciences, Dalian Medical University, Dalian116044, China
| | - Mo-Li Wu
- Liaoning
Laboratory of Cancer Genomics and Epigenomics, College of Basic Medical
Sciences, Dalian Medical University, Dalian116044, China
| | - Yang Yang
- Liaoning
Laboratory of Cancer Genomics and Epigenomics, College of Basic Medical
Sciences, Dalian Medical University, Dalian116044, China
| | - Jin-wei Chen
- South
China University of Technology School of Medicine, Guangzhou510006, China
| | - Hui-Chang Gao
- South
China University of Technology School of Medicine, Guangzhou510006, China
| | - Jia Liu
- Liaoning
Laboratory of Cancer Genomics and Epigenomics, College of Basic Medical
Sciences, Dalian Medical University, Dalian116044, China
- South
China University of Technology School of Medicine, Guangzhou510006, China
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Khatun S, Appidi T, Rengan AK. Casein nanoformulations - Potential biomaterials in theranostics. FOOD BIOSCI 2022. [DOI: 10.1016/j.fbio.2022.102200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Ramesh PA, Dhandapani R, Bagewadi S, Zennifer A, Radhakrishnan J, Sethuraman S, Subramanian A. Reverse engineering of an anatomically equivalent nerve conduit. J Tissue Eng Regen Med 2021; 15:998-1011. [PMID: 34551457 DOI: 10.1002/term.3245] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 07/29/2021] [Accepted: 09/02/2021] [Indexed: 01/12/2023]
Abstract
Reconstruction of peripheral nervous tissue remains challenging in critical-sized defects due to the lack of Büngner bands from the proximal to the distal nerve ends. Conventional nerve guides fail to bridge the large-sized defect owing to the formation of a thin fibrin cable. Hence, in the present study, an attempt was made to reverse engineer the intricate epi-, peri- and endo-neurial tissues using Fused Deposition Modeling based 3D printing. Bovine serum albumin protein nanoflowers (NF) exhibiting Viburnum opulus 'Roseum' morphology were ingrained into 3D printed constructs without affecting its secondary structure to enhance the axonal guidance from proximal to distal ends of denuded nerve ends. Scanning electron micrographs confirmed the uniform distribution of protein NF in 3D printed constructs. The PC-12 cells cultured on protein ingrained 3D printed scaffolds demonstrated cytocompatibility, improved cell adhesion and extended neuronal projections with significantly higher intensities of NF-200 and tubulin expressions. Further suture-free fixation designed in the current 3D printed construct aids facile implantation of printed conduits to the transected nerve ends. Hence the protein ingrained 3D printed construct would be a promising substitute to treat longer peripheral nerve defects as its structural equivalence of endo- and perineurial organization along with the ingrained protein NF promote the neuronal extension towards the distal ends by minimizing axonal dispersion.
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Affiliation(s)
- Preethy Amruthavarshini Ramesh
- Tissue Engineering and Additive Manufacturing (TEAM) Lab, Centre for Nanotechnology & Advanced Biomaterials, ABCDE Innovation Centre, School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur, India
| | - Ramya Dhandapani
- Tissue Engineering and Additive Manufacturing (TEAM) Lab, Centre for Nanotechnology & Advanced Biomaterials, ABCDE Innovation Centre, School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur, India
| | - Shambhavi Bagewadi
- Tissue Engineering and Additive Manufacturing (TEAM) Lab, Centre for Nanotechnology & Advanced Biomaterials, ABCDE Innovation Centre, School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur, India
| | - Allen Zennifer
- Tissue Engineering and Additive Manufacturing (TEAM) Lab, Centre for Nanotechnology & Advanced Biomaterials, ABCDE Innovation Centre, School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur, India
| | - Janani Radhakrishnan
- Tissue Engineering and Additive Manufacturing (TEAM) Lab, Centre for Nanotechnology & Advanced Biomaterials, ABCDE Innovation Centre, School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur, India
| | - Swaminathan Sethuraman
- Tissue Engineering and Additive Manufacturing (TEAM) Lab, Centre for Nanotechnology & Advanced Biomaterials, ABCDE Innovation Centre, School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur, India
| | - Anuradha Subramanian
- Tissue Engineering and Additive Manufacturing (TEAM) Lab, Centre for Nanotechnology & Advanced Biomaterials, ABCDE Innovation Centre, School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur, India
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Ko CH, Shie MY, Lin JH, Chen YW, Yao CH, Chen YS. Biodegradable Bisvinyl Sulfonemethyl-crosslinked Gelatin Conduit Promotes Regeneration after Peripheral Nerve Injury in Adult Rats. Sci Rep 2017; 7:17489. [PMID: 29235541 PMCID: PMC5727525 DOI: 10.1038/s41598-017-17792-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Accepted: 11/30/2017] [Indexed: 12/20/2022] Open
Abstract
In our previous study, we found that gelatin-based materials exhibit good conductivity and are non-cytotoxic. In this study, gelatin was cross-linked with bisvinyl sulfonemethyl (BVSM) to fabricate a biodegradable conduit for peripheral nerve repair. First, BVSM on the prepared conduit was characterized to determine its mechanical properties and contact angle. The maximum tensile strength and water contact angle of the gelatin-BVSM conduits were 23 ± 4.8 MPa and 74.7 ± 9°, which provided sufficient mechanical strength to resist muscular contraction; additionally, the surface was hydrophilic. Cytotoxicity and apoptosis assays using Schwann cells demonstrated that the gelatin-BVSM conduits are non-cytotoxic. Next, we examined the neuronal electrophysiology, animal behavior, neuronal connectivity, macrophage infiltration, calcitonin gene-related peptide localization and expression, as well as the expression levels of nerve regeneration-related proteins. The number of fluorogold-labelled cells and histological analysis of the gelatin-BVSM nerve conduits was similar to that observed with the clinical use of silicone rubber conduits after 8 weeks of repair. Therefore, our results demonstrate that gelatin-BVSM conduits are promising substrates for application as bioengineered grafts for nerve tissue regeneration.
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Affiliation(s)
- Chien-Hsin Ko
- Graduate Institute of Basic Medical Sciences, China Medical University, Taichung, Taiwan
- Department of Traditional Chinese Medicine, Tzu Chi Hospital, Hualien, Taiwan
| | - Ming-You Shie
- School of Dentistry, China Medical University, Taichung, Taiwan
- 3D Printing Medical Research Center, China Medical University Hospital, China Medical University, Taichung, Taiwan
| | - Jia-Horng Lin
- Department of Fiber and Composite Materials, Feng Chia University, Taichung, Taiwan
| | - Yi-Wen Chen
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan
- 3D Printing Research Center, Asia University, Taichung, Taiwan
| | - Chun-Hsu Yao
- Biomaterials Translational Research Center, China Medical University Hospital, Taichung, Taiwan.
- Lab of Biomaterials, School of Chinese Medicine, China Medical University, Taichung, Taiwan.
- Department of Bioinformatics and Medical Engineering, Asia University, Taichung, Taiwan.
| | - Yueh-Sheng Chen
- Biomaterials Translational Research Center, China Medical University Hospital, Taichung, Taiwan.
- Lab of Biomaterials, School of Chinese Medicine, China Medical University, Taichung, Taiwan.
- Department of Bioinformatics and Medical Engineering, Asia University, Taichung, Taiwan.
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6
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Braga Silva J, Marchese GM, Cauduro CG, Debiasi M. Nerve conduits for treating peripheral nerve injuries: A systematic literature review. HAND SURGERY & REHABILITATION 2017; 36:71-85. [PMID: 28325431 DOI: 10.1016/j.hansur.2016.10.212] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Revised: 09/22/2016] [Accepted: 10/26/2016] [Indexed: 01/16/2023]
Abstract
Peripheral nerve injuries are a major public health problem. Nerve conduits have been developed in the recent years, although it is still not clear if they should replace nerve grafting and neurorrhaphy. This systematic review aims to gather evidence regarding the use of nerve conduits for peripheral nerve repair. The following electronic databases were searched: MEDLINE, Cochrane Library (CENTRAL) and Embase. Study selection and data extraction followed the PRISMA guidelines. The systematic review of the literature retrieved 6767 articles. Only 27 studies were retained accounting for 1022 patients: 10 randomized controlled trials, 15 case series and 2 cohort studies. Ten different types of tubes were described and a variety of evaluation methods were used to assess outcomes in terms of efficacy (motor and sensory recovery) and complications. The Semmes-Weinstein monofilament test and the static and moving 2-point discrimination test were the most commonly applied tests to evaluate nerve recovery. In general, outcomes showed no significant difference between groups. Synthetic conduits had more complications. Despite major methodological limitations in the studies, we can conclude that use of nerve conduits is preferable over suture repair and nerve grafting, as the functional recovery rates are above 80%. The choice of conduit is based on the surgeon's expertise, but use of synthetic conduits is discouraged due to their higher complication rates.
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Affiliation(s)
- J Braga Silva
- PUCRS School of Medicine, Ipiranga Avenue, 6681 Partenon - Building 60, 90610-000 Porto Alegre, RS, Brazil.
| | - G M Marchese
- PUCRS School of Medicine, Ipiranga Avenue, 6681 Partenon - Building 60, 90610-000 Porto Alegre, RS, Brazil
| | - C G Cauduro
- PUCRS School of Medicine, Ipiranga Avenue, 6681 Partenon - Building 60, 90610-000 Porto Alegre, RS, Brazil
| | - M Debiasi
- Latin American Cooperative Oncology Group (LACOG), Ipiranga Avenue, 6681 Partenon - Building 99A/office 806, 90610-000 Porto Alegre, RS, Brazil
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7
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Ge J, Zhu S, Yang Y, Liu Z, Hu X, Huang L, Quan X, Wang M, Huang J, Li Y, Luo Z. Experimental immunological demyelination enhances regeneration in autograft-repaired long peripheral nerve gaps. Sci Rep 2016; 6:39828. [PMID: 28008990 PMCID: PMC5180223 DOI: 10.1038/srep39828] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Accepted: 11/29/2016] [Indexed: 12/22/2022] Open
Abstract
Peripheral nerve long gap defects are a clinical challenge in the regeneration field. Despite the wide variety of surgical techniques and therapies, autografting is the "gold standard" for peripheral nerve gap reconstruction. The pathological process of Wallerian degeneration from the time of acute injury to efficient regeneration requires several weeks. Regeneration time is critical for nerve reconstruction. Immunological demyelination induced by anti-galactocerebroside antibodies plus guinea pig complement was used to shorten the treatment time. Based on an antigen-antibody complex reaction, the demyelinating agent induced an acute and severe demyelination, leading to the pathological process of Wallerian degeneration during the demyelinating period. This method was used to treat a 12 mm-long sciatic nerve defect in rats. The control groups were injected with one of the demyelinating agent components. The results indicated that anti-galactocerebroside antibodies plus guinea pig complement can significantly shorten treatment time and promote nerve regeneration and functional recovery. In addition, the demyelinating agent can increase the mRNA levels of nerve growth factors and can regulate inflammation. In conclusion, treatment with anti-galactocerebroside antibodies plus guinea pig complement can promote axonal regeneration. This therapy provides a novel method to improve functional recovery in the treatment of long nerve defects.
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Affiliation(s)
- Jun Ge
- Institute of Orthopedics, Xijing Hospital, the Fourth Military Medical University, Xi'an 710032, PR China.,The department of anatomy, the Fourth Military Medical University, Xi'an 710032, PR China
| | - Shu Zhu
- Institute of Orthopedics, Xijing Hospital, the Fourth Military Medical University, Xi'an 710032, PR China
| | - Yafeng Yang
- Institute of Orthopedics, Xijing Hospital, the Fourth Military Medical University, Xi'an 710032, PR China
| | - Zhongyang Liu
- Institute of Orthopedics, Xijing Hospital, the Fourth Military Medical University, Xi'an 710032, PR China
| | - Xueyu Hu
- Institute of Orthopedics, Xijing Hospital, the Fourth Military Medical University, Xi'an 710032, PR China
| | - Liangliang Huang
- Institute of Orthopedics, Xijing Hospital, the Fourth Military Medical University, Xi'an 710032, PR China
| | - Xin Quan
- Institute of Orthopedics, Xijing Hospital, the Fourth Military Medical University, Xi'an 710032, PR China
| | - Meng Wang
- General Political Department Hospital of PLA, Beijing 100120, PR China
| | - Jinghui Huang
- Institute of Orthopedics, Xijing Hospital, the Fourth Military Medical University, Xi'an 710032, PR China
| | - Yunqing Li
- The department of anatomy, the Fourth Military Medical University, Xi'an 710032, PR China
| | - Zhuojing Luo
- Institute of Orthopedics, Xijing Hospital, the Fourth Military Medical University, Xi'an 710032, PR China
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8
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Gattazzo F, De Maria C, Whulanza Y, Taverni G, Ahluwalia A, Vozzi G. Realisation and characterization of conductive hollow fibers for neuronal tissue engineering. J Biomed Mater Res B Appl Biomater 2014; 103:1107-19. [DOI: 10.1002/jbm.b.33297] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Revised: 08/16/2014] [Accepted: 09/12/2014] [Indexed: 12/13/2022]
Affiliation(s)
- Francesca Gattazzo
- Research Center “E. Piaggio,” University of Pisa; Largo Lucio Lazzarino 1 Pisa 56122 Italy
- Department of Molecular Medicine; University of Padova; Padova 35131 Italy
| | - Carmelo De Maria
- Research Center “E. Piaggio,” University of Pisa; Largo Lucio Lazzarino 1 Pisa 56122 Italy
- Department of Ingegneria dell'Informazione; University of Pisa; Via G. Caruso 16 Pisa 56122 Italy
| | - Yudan Whulanza
- Research Center “E. Piaggio,” University of Pisa; Largo Lucio Lazzarino 1 Pisa 56122 Italy
| | - Gemma Taverni
- Research Center “E. Piaggio,” University of Pisa; Largo Lucio Lazzarino 1 Pisa 56122 Italy
| | - Arti Ahluwalia
- Research Center “E. Piaggio,” University of Pisa; Largo Lucio Lazzarino 1 Pisa 56122 Italy
- Department of Ingegneria dell'Informazione; University of Pisa; Via G. Caruso 16 Pisa 56122 Italy
| | - Giovanni Vozzi
- Research Center “E. Piaggio,” University of Pisa; Largo Lucio Lazzarino 1 Pisa 56122 Italy
- Department of Ingegneria dell'Informazione; University of Pisa; Via G. Caruso 16 Pisa 56122 Italy
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Pang Y, Hong Q, Zheng J. Sensory reinnervation of muscle spindles after repair of tibial nerve defects using autogenous vein grafts. Neural Regen Res 2014; 9:610-5. [PMID: 25206863 PMCID: PMC4146236 DOI: 10.4103/1673-5374.130103] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/12/2014] [Indexed: 12/24/2022] Open
Abstract
Motor reinnervation after repair of tibial nerve defects using autologous vein grafts in rats has previously been reported, but sensory reinnervation after the same repair has not been fully investigated. In this study, partial sensory reinnervation of muscle spindles was observed after repair of 10-mm left tibial nerve defects using autologous vein grafts with end-to-end anastomosis in rats, and functional recovery was confirmed by electrophysiological studies. There were no significant differences in the number, size, or electrophysiological function of reinnervated muscle spindles between the two experimental groups. These findings suggest that repair of short nerve defects with autologous vein grafts provides comparable results to immediate end-to-end anastomosis in terms of sensory reinnervation of muscle spindles.
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Affiliation(s)
- Youwang Pang
- Department of Orthopedics, the 180 Hospital of Chinese PLA, Quanzhou, Fujian Province, China
| | - Qingnan Hong
- Department of Orthopedics, the 180 Hospital of Chinese PLA, Quanzhou, Fujian Province, China
| | - Jinan Zheng
- Department of Orthopedics, the 180 Hospital of Chinese PLA, Quanzhou, Fujian Province, China
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Arslantunali D, Budak G, Hasirci V. Multiwalled CNT-pHEMA composite conduit for peripheral nerve repair. J Biomed Mater Res A 2013; 102:828-41. [PMID: 23554154 DOI: 10.1002/jbm.a.34727] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2012] [Revised: 03/12/2013] [Accepted: 03/14/2013] [Indexed: 11/08/2022]
Abstract
A nerve conduit is designed to improve peripheral nerve regeneration by providing guidance to the nerve cells. Conductivity of such guides is reported to enhance this process. In the current study, a nerve guide was constructed from poly(2-hydroxyethyl methacrylate) (pHEMA), which was loaded with multiwalled carbon nanotubes (mwCNT) to introduce conductivity. PHEMA hydrogels were designed to have a porous structure to facilitate the transportation of the compounds needed for cell nutrition and growth and also for waste removal. We showed that when loaded with relatively high concentrations of mwCNTs (6%, w/w in hydrogels), the pHEMA guide was more conductive and more hydrophobic than pristine pHEMA hydrogel. The mechanical properties of the composites were better when they carried mwCNT. Elastic modulus of 6% mwCNT loaded pHEMA was twofold higher (0.32 ± 0.06 MPa) and similar to that of the soft tissues. Electrical conductivity was significantly improved (11.4-fold) from 7 × 10(-3) Ω(-1).cm(-1) (pHEMA) to 8.0 × 10(-2) Ω(-1).cm(-1) (6% mwCNT loaded pHEMA). On application of electrical potential, the SHSY5Y neuroblastoma cells seeded on mwCNTs carrying pHEMA maintained their viability, whereas those on pure pHEMA could not, indicating that mwCNT helped conduct electricity and make them more suitable as nerve conduits.
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Affiliation(s)
- D Arslantunali
- BIOMATEN, METU Center of Excellence in Biomaterials and Tissue Engineering, Ankara, Turkey; Department of Biotechnology, METU, Ankara, Turkey; Department of Bioengineering, Gümüşhane University, Gümüşhane, Turkey
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11
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Ferulic Acid Enhances Peripheral Nerve Regeneration across Long Gaps. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2013; 2013:876327. [PMID: 23690861 PMCID: PMC3652149 DOI: 10.1155/2013/876327] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Accepted: 03/27/2013] [Indexed: 01/12/2023]
Abstract
This study investigated the effect of ferulic acid (FA) on peripheral nerve injury. In the in vitro test, the effect of FA on viability of Schwann cells was studied. In the in vivo test, right sciatic nerves of the rats were transected, and a 15 mm nerve defect was created. A nerve conduit made of silicone rubber tube filled with FA (5 and 25 μg/mL), or saline (control), was implanted into the nerve defect. Results show that the number of proliferating Schwann cells increased significantly in the FA-treated group at 25 μg/mL compared to that in the control group. After 8 weeks, the FA-treated group at 25 μg/mL had a higher rate of successful regeneration across the wide gap, a significantly calcitonin gene-related peptide (CGRP) staining of the lamina I-II regions in the dorsal horn ipsilateral to the injury, a significantly diminished number of macrophages recruited, and a significantly shortening of the latency and an acceleration of the nerve conductive velocity (NCV) of the evoked muscle action potentials (MAPs) compared with the controls. In summary, the FA may be useful in the development of future strategies for the treatment of peripheral nerve injury.
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12
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Smith JD, Weiss LE, Burgess JE, West AI, Campbell PG. Biologically Active Blood Plasma-Based Biomaterials as a New Paradigm for Tissue Repair Therapies. ACTA ACUST UNITED AC 2013. [DOI: 10.1089/dst.2012.0024] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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13
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Wang H, Zhao Q, Zhao W, Liu Q, Gu X, Yang Y. Repairing rat sciatic nerve injury by a nerve-growth-factor-loaded, chitosan-based nerve conduit. Biotechnol Appl Biochem 2012; 59:388-94. [PMID: 23586915 DOI: 10.1002/bab.1031] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Accepted: 07/17/2012] [Indexed: 01/19/2023]
Abstract
We have developed a nerve conduit made up of chitosan, on which nerve growth factor (NGF) was immobilized via genipin cross-linking. The nerve conduit was used to bridge a 10-mm-long sciatic nerve gap in rats. At 24 weeks after surgery, electrophysiological assessment, behavioral analysis, and histological examination were conducted to evaluate the outcomes of peripheral nerve repair. The nerve conduit allowed nerve reconstruction between two stumps and reinnervation of the target gastrocnemius muscle. For two groups of rats repaired respectively by the nerve conduit and autologous nerve graft, the density of regenerated axons was 3.55 ± 0.51 and 3.91 ± 0.14 (P = 0.712), and the cross-sectional area of target muscles was 1,159.68 ± 305.85 and 1,307.06 ± 301.25 (P = 0.922), respectively, without significant differences between the two groups. Our data suggest the feasibility of using chitosan-based, NGF-loaded nerve conduits for peripheral nerve repair.
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Affiliation(s)
- Hongkui Wang
- Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Nantong, People's Republic of China
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