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Li Q, Liang W, Wu H, Li J, Wang G, Zhen Y, An Y. Challenges in Application: Gelation Strategies of DAT-Based Hydrogel Scaffolds. TISSUE ENGINEERING. PART B, REVIEWS 2024. [PMID: 38666688 DOI: 10.1089/ten.teb.2023.0357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2024]
Abstract
Decellularized adipose tissue (DAT) has great clinical applicability, owing to its abundant source material, natural extracellular matrix microenvironment, and nonimmunogenic attributes, rendering it a versatile resource in the realm of tissue engineering. However, practical implementations are confronted with multifarious limitations. Among these, the selection of an appropriate gelation strategy serves as the foundation for adapting to diverse clinical contexts. The cross-linking strategies under varying physical or chemical conditions exert profound influences on the ultimate morphology and therapeutic efficacy of DAT. This review sums up the processes of DAT decellularization and subsequent gelation, with a specific emphasis on the diverse gelation strategies employed in recent experimental applications of DAT. The review expounds upon methodologies, underlying principles, and clinical implications of different gelation strategies, aiming to offer insights and inspiration for the application of DAT in tissue engineering and advance research for tissue engineering scaffold development.
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Affiliation(s)
- Qiaoyu Li
- Department of Plastic Surgery, Peking University Third Hospital, Beijing, China
| | - Wei Liang
- Department of Plastic Surgery, Peking University Third Hospital, Beijing, China
| | - Huiting Wu
- Department of Plastic Surgery, Peking University Third Hospital, Beijing, China
| | - Jingming Li
- Department of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, China
| | - Guanhuier Wang
- Department of Plastic Surgery, Peking University Third Hospital, Beijing, China
| | - Yonghuan Zhen
- Department of Plastic Surgery, Peking University Third Hospital, Beijing, China
| | - Yang An
- Department of Plastic Surgery, Peking University Third Hospital, Beijing, China
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2
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Sun W, Ye B, Chen S, Zeng L, Lu H, Wan Y, Gao Q, Chen K, Qu Y, Wu B, Lv X, Guo X. Neuro-bone tissue engineering: emerging mechanisms, potential strategies, and current challenges. Bone Res 2023; 11:65. [PMID: 38123549 PMCID: PMC10733346 DOI: 10.1038/s41413-023-00302-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 10/08/2023] [Accepted: 10/31/2023] [Indexed: 12/23/2023] Open
Abstract
The skeleton is a highly innervated organ in which nerve fibers interact with various skeletal cells. Peripheral nerve endings release neurogenic factors and sense skeletal signals, which mediate bone metabolism and skeletal pain. In recent years, bone tissue engineering has increasingly focused on the effects of the nervous system on bone regeneration. Simultaneous regeneration of bone and nerves through the use of materials or by the enhancement of endogenous neurogenic repair signals has been proven to promote functional bone regeneration. Additionally, emerging information on the mechanisms of skeletal interoception and the central nervous system regulation of bone homeostasis provide an opportunity for advancing biomaterials. However, comprehensive reviews of this topic are lacking. Therefore, this review provides an overview of the relationship between nerves and bone regeneration, focusing on tissue engineering applications. We discuss novel regulatory mechanisms and explore innovative approaches based on nerve-bone interactions for bone regeneration. Finally, the challenges and future prospects of this field are briefly discussed.
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Affiliation(s)
- Wenzhe Sun
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Bing Ye
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Siyue Chen
- School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Lian Zeng
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Hongwei Lu
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Yizhou Wan
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Qing Gao
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Kaifang Chen
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Yanzhen Qu
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Bin Wu
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - Xiao Lv
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China.
| | - Xiaodong Guo
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China.
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3
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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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4
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Liu X, Wang J, Wang P, Zhong L, Wang S, Feng Q, Wei X, Zhou L. Hypoxia-pretreated mesenchymal stem cell-derived exosomes-loaded low-temperature extrusion 3D-printed implants for neural regeneration after traumatic brain injury in canines. Front Bioeng Biotechnol 2022; 10:1025138. [PMID: 36246376 PMCID: PMC9562040 DOI: 10.3389/fbioe.2022.1025138] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Accepted: 09/13/2022] [Indexed: 11/28/2022] Open
Abstract
Regenerating brain defects after traumatic brain injury (TBI) still remains a significant difficulty, which has motivated interest in 3D printing to design superior replacements for brain implantation. Collagen has been applied to deliver cells or certain neurotrophic factors for neuroregeneration. However, its fast degradation rate and poor mechanical strength prevent it from being an excellent implant material after TBI. In the present study, we prepared 3D-printed collagen/silk fibroin/hypoxia-pretreated human umbilical cord mesenchymal stem cells (HUCMSCs)-derived exosomes scaffolds (3D-CS-HMExos), which possessed favorable physical properties suitable biocompatibility and biodegradability and were attractive candidates for TBI treatment. Furthermore, inspired by exosomal alterations resulting from cells in different external microenvironments, exosomes were engineered through hypoxia stimulation of mesenchymal stem cells and were proposed as an alternative therapy for promoting neuroregeneration after TBI. We designed hypoxia-preconditioned (Hypo) exosomes derived from HUCMSCs (Hypo-MExos) and proposed them as a selective therapy to promote neuroregeneration after TBI. For the current study, 3D-CS-HMExos were prepared for implantation into the injured brains of beagle dogs. The addition of hypoxia-induced exosomes further exhibited better biocompatibility and neuroregeneration ability. Our results revealed that 3D-CS-HMExos could significantly promote neuroregeneration and angiogenesis due to the doping of hypoxia-induced exosomes. In addition, the 3D-CS-HMExos further inhibited nerve cell apoptosis and proinflammatory factor (TNF-α and IL-6) expression and promoted the expression of an anti-inflammatory factor (IL-10), ultimately enhancing the motor functional recovery of TBI. We proposed that the 3D-CS-loaded encapsulated hypoxia-induced exosomes allowed an adaptable environment for neuroregeneration, inhibition of inflammatory factors and promotion of motor function recovery in TBI beagle dogs. These beneficial effects implied that 3D-CS-HMExos implants could serve as a favorable strategy for defect cavity repair after TBI.
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Affiliation(s)
- Xiaoyin Liu
- Department of Neurosurgery, West China Hospital, West China Medical School, Sichuan University, Chengdu, Sichuan, China
- Tianjin Key Laboratory of Neurotrauma Repair, Institute of Neurotrauma Repair, Characteristic Medical Center of People’s Armed Police Forces, Tianjin, China
| | - Jingjing Wang
- Tianjin Key Laboratory of Neurotrauma Repair, Institute of Neurotrauma Repair, Characteristic Medical Center of People’s Armed Police Forces, Tianjin, China
| | - Peng Wang
- Department of Health Management, Tianjin Hospital, Tianjin, China
| | - Lin Zhong
- The First Affiliated Hospital of Chengdu Medical College, Chengdu, Sichuan, China
| | - Shan Wang
- Department of Neurosurgery, West China Hospital, West China Medical School, Sichuan University, Chengdu, Sichuan, China
| | - Qingbo Feng
- Department of Liver Surgery and Liver Implantation, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
- *Correspondence: Qingbo Feng, ; Xin Wei, ; Liangxue Zhou,
| | - Xin Wei
- Department of Urology, Institute of Urology, West China Hospital, West China Medical School, Sichuan University, Chengdu, Sichuan, China
- *Correspondence: Qingbo Feng, ; Xin Wei, ; Liangxue Zhou,
| | - Liangxue Zhou
- Department of Neurosurgery, West China Hospital, West China Medical School, Sichuan University, Chengdu, Sichuan, China
- *Correspondence: Qingbo Feng, ; Xin Wei, ; Liangxue Zhou,
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5
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Liu X, Zhang G, Wei P, Hao L, Zhong L, Zhong K, Liu C, Liu P, Feng Q, Wang S, Zhang J, Tian R, Zhou L. 3D-printed collagen/silk fibroin/secretome derived from bFGF-pretreated HUCMSCs scaffolds enhanced therapeutic ability in canines traumatic brain injury model. Front Bioeng Biotechnol 2022; 10:995099. [PMID: 36091465 PMCID: PMC9449499 DOI: 10.3389/fbioe.2022.995099] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Accepted: 08/01/2022] [Indexed: 11/13/2022] Open
Abstract
The regeneration of brain tissue poses a great challenge because of the limited self-regenerative capabilities of neurons after traumatic brain injury (TBI). For this purpose, 3D-printed collagen/silk fibroin/secretome derived from human umbilical cord blood mesenchymal stem cells (HUCMSCs) pretreated with bFGF scaffolds (3D-CS-bFGF-ST) at a low temperature were prepared in this study. From an in vitro perspective, 3D-CS-bFGF-ST showed good biodegradation, appropriate mechanical properties, and good biocompatibility. In regard to vivo, during the tissue remodelling processes of TBI, the regeneration of brain tissues was obviously faster in the 3D-CS-bFGF-ST group than in the other two groups (3D-printed collagen/silk fibroin/secretome derived from human umbilical cord blood mesenchymal stem cells (3D-CS-ST) group and TBI group) by motor assay, histological analysis, and immunofluorescence assay. Satisfactory regeneration was achieved in the two 3D-printed scaffold-based groups at 6 months postsurgery, while the 3D-CS-bFGF-ST group showed a better outcome than the 3D-CS-ST group.
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Affiliation(s)
- Xiaoyin Liu
- Department of Neurosurgery, West China Hospital, West China Medical School, Sichuan University, Chengdu, China
| | - Guijun Zhang
- Department of Neurosurgery, West China Hospital, West China Medical School, Sichuan University, Chengdu, China
| | - Pan Wei
- Department of Neurosurgery, The First People’s Hospital of Long Quan yi District, Chengdu, China
| | - Lifang Hao
- Department of Radiology, Liao Cheng The Third People’s Hospital, Liaocheng, China
| | - Lin Zhong
- The First Affiliated Hospital of Chengdu Medical College, Chengdu, China
| | - Kunhon Zhong
- State Key Laboratory of Biotherapy, West China Hospital, West China Medical School, Sichuan University, Chengdu, China
| | - Chang Liu
- Department of Neurosurgery, West China Hospital, West China Medical School, Sichuan University, Chengdu, China
| | - Peng Liu
- Department of Neurosurgery, West China Hospital, West China Medical School, Sichuan University, Chengdu, China
| | - Qingbo Feng
- Department of Liver Surgery and Liver Transplantation, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, China
| | - Shan Wang
- Department of Neurosurgery, West China Hospital, West China Medical School, Sichuan University, Chengdu, China
| | - Jianyong Zhang
- Department of General Surgery, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
- *Correspondence: Jianyong Zhang, ; Rui Tian, ; Liangxue Zhou,
| | - Rui Tian
- Department of Neurosurgery, West China Hospital, West China Medical School, Sichuan University, Chengdu, China
- *Correspondence: Jianyong Zhang, ; Rui Tian, ; Liangxue Zhou,
| | - Liangxue Zhou
- Department of Neurosurgery, West China Hospital, West China Medical School, Sichuan University, Chengdu, China
- *Correspondence: Jianyong Zhang, ; Rui Tian, ; Liangxue Zhou,
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6
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Narimanpour Z, Bojnordi MN, Hamidabadi HG. Spermatogenic differentiation of spermatogonial stem cells on three-dimensional silk nanofiber scaffold. MIDDLE EAST FERTILITY SOCIETY JOURNAL 2022. [DOI: 10.1186/s43043-022-00107-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
Nano-fibrous scaffolds provide a three-dimensional matrix that guides sufficient orientation of seeded cells similar to a natural niche. In this research, we designed a silk scaffold to improve the differention of mouse spermatogonial stem cells to spermatogenic cell lines. Spermatogonial stem cells were collected from neonatal mouse (2–6 days) testes (n=60) using a two steps mechanical and enzymatic method. Cells were seeded on a silk scaffold and were cultured in Dulbecco’s modified Eagle’s medium, supplemented with 15 % fetal bovine serum and 1000 units/ml leukemia inhibitory factor, and incubated at 32°C in a humidified atmosphere of 5% CO2 in air. SEM technique was done for confirmation of seeding cells.
In this study two major groups (i.e., 2D and 3D culture groups) of 30 mice each. Isolated testicular cells from each group were cultured in the absence of silk scaffold or the presence of silk scaffold.
For induction of differentiation, seeded cells on a scaffold were exposed to 1 μM and 50 ng/ml BMP-4. The specific spermatogenic genes, e.g.; VASA, DAZL, PLZF, and Piwil2, were assessed via real-time PCR and immunocytochemistry techniques. P values less than 0.05 were assumed significant. All experiments were performed at least three times.
Results
SEM analysis confirmed the homogeneity of fabricated silk scaffold and average diameter of 450 nm for nanofibers fibers. Silk scaffold induces attachment of SSCs in comparison to the monolayer group. Spermatogonia stem cell colonies were observed gradually after 1 week of culture. Electrospun scaffold supports the differentiation of SSCs to spermatogenic lines. Dates of real-time PCR showed that the expression of meiotic markers, VASA, DAZL, and Piwil2 as related to specific spermatogenic genes, had a significant upregulation in cell-seeded silk scaffold compared to the control group (P < 0.05).
Immunocytochemistry founding approved the expression of specific spermatogenic markers; DAZL and PLZF were higher in the experiment group compared to the control (P < 0.05).
Conclusion
It is concluded silk scaffold induces spermatogenic differentiation of mouse spermatogonial stem cells in vitro.
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7
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Chen C, Xu HH, Liu XY, Zhang YS, Zhong L, Wang YW, Xu L, Wei P, Chen YX, Liu P, Hao CR, Jia XL, Hu N, Wu XY, Gu XS, Chen LQ, Li XH. 3D printed collagen/silk fibroin scaffolds carrying the secretome of human umbilical mesenchymal stem cells ameliorated neurological dysfunction after spinal cord injury in rats. Regen Biomater 2022; 9:rbac014. [PMID: 35480857 PMCID: PMC9036898 DOI: 10.1093/rb/rbac014] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 02/11/2022] [Accepted: 02/15/2022] [Indexed: 02/05/2023] Open
Abstract
Abstract
Although implantation of biomaterials carrying mesenchymal stem cells (MSCs) is considered as a promising strategy for ameliorating neural function after spinal cord injury (SCI), there are still some challenges including poor cell survival rate, tumorigenicity and ethics concerns. The performance of the secretome derived from MSCs was more stable, and its clinical transformation was more operable. Cytokine antibody array demonstrated that the secretome of MSCs contained 79 proteins among the 174 proteins analyzed. 3D printed collagen/silk fibroin scaffolds carrying MSCs secretome improved hindlimb locomotor function according to the BBB scores, the inclined-grid climbing test and electrophysiological analysis. Parallel with locomotor function recovery, 3D printed collagen/silk fibroin scaffolds carrying MSCs secretome could further facilitate nerve fiber regeneration, enhance remyelination and accelerate the establishment of synaptic connections at the injury site compared to 3D printed collagen/silk fibroin scaffolds alone group according to magnetic resonance imaging (MRI), diffusion Tensor imaging (DTI), hematoxylin and eosin (HE) staining, Bielschowsky’s silver staining immunofluorescence staining and transmission electron microscopy (TEM). These results indicated the implantation of 3D printed collagen/silk fibroin scaffolds carrying MSCs secretome might be a potential treatment for SCI.
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Affiliation(s)
- Chong Chen
- Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin, 300072, China
- Tianjin Key Laboratory of Neurotrauma Repair, Pingjin Hospital Brain Center, Characteristic Medical Center of People’s Armed Police Forces, Tianjin, 300162, China
| | - Hai-Huan Xu
- Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin, 300072, China
- Tianjin Key Laboratory of Neurotrauma Repair, Pingjin Hospital Brain Center, Characteristic Medical Center of People’s Armed Police Forces, Tianjin, 300162, China
| | - Xiao-Yin Liu
- Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin, 300072, China
- Department of Neurosurgery, West China Medical School, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China
- National Engineering Research Center for Biomaterials, College of Biomedical Engineering, Sichuan University, Chengdu, Sichuan, 610064, China
| | - Yu-Sheng Zhang
- National Engineering Research Center for Biomaterials, College of Biomedical Engineering, Sichuan University, Chengdu, Sichuan, 610064, China
| | - Lin Zhong
- Department of Hematology, the first affiliated hospital of Chengdu medical college, Chengdu, Sichuan, 610500, China
| | - You-Wei Wang
- Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin, 300072, China
| | - Lin Xu
- Medical Psychology Section, Hubei General Hospital of Armed Police Force, Wuhan, Hubei, 430071, China
| | - Pan Wei
- Department of Neurosurgery, The First People's Hospital Of Long Quan yi District, Cheng Du 610000, Si Chuan, China
| | - Ya-Xing Chen
- Department of Neurosurgery, West China Medical School, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China
| | - Peng Liu
- Department of Neurosurgery, West China Medical School, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, China
| | - Chen-Ru Hao
- Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin, 300072, China
| | - Xiao-Li Jia
- Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin, 300072, China
| | - Nan Hu
- Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin, 300072, China
| | - Xiao-Yang Wu
- National Engineering Research Center for Biomaterials, College of Biomedical Engineering, Sichuan University, Chengdu, Sichuan, 610064, China
| | - Xiao-Song Gu
- Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin, 300072, China
| | - Li-Qun Chen
- Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin, 300072, China
| | - Xiao-Hong Li
- Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin, 300072, China
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8
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Jana S, Das P, Mukherjee J, Banerjee D, Ghosh PR, Kumar Das P, Bhattacharya RN, Nandi SK. Waste-derived biomaterials as building blocks in the biomedical field. J Mater Chem B 2022; 10:489-505. [PMID: 35018942 DOI: 10.1039/d1tb02125g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Recent developments in the biomedical arena have led to the fabrication of innovative biomaterials by utilizing bioactive molecules obtained from biological wastes released from fruit and beverage processing industries, and fish, meat, and poultry industries. These biological wastes that end up in water bodies as well as in landfills are an affluent source of animal- and plant-derived proteins, bio ceramics and polysaccharides such as collagens, gelatins, chitins, chitosans, eggshell membrane proteins, hydroxyapatites, celluloses, and pectins. These bioactive molecules have been intricately designed into scaffolds and dressing materials by utilizing advanced technologies for drug delivery, tissue engineering, and wound healing relevance. These biomaterials are environment-friendly, biodegradable, and biocompatible, and show excellent tissue regeneration attributes. Additionally, being cost-effective they can reduce the burden on the healthcare system as well as provide a sustainable solution to waste management. In this review, the current trends in the utilization of plant and animal waste-derived biomaterials in various biomedical fields are considered along with a separate section on their applications as xenografts.
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Affiliation(s)
- Sonali Jana
- Department of Veterinary Physiology, West Bengal University of Animal and Fishery Sciences, Kolkata 700037, India
| | - Piyali Das
- Department of Microbiology, School of Life Sciences and Biotechnology, Adamas University, Barasat, West Bengal 700126, India
| | - Joydip Mukherjee
- Department of Veterinary Physiology, West Bengal University of Animal and Fishery Sciences, Kolkata 700037, India
| | - Dipak Banerjee
- Department of Veterinary Physiology, West Bengal University of Animal and Fishery Sciences, Kolkata 700037, India
| | - Prabal Ranjan Ghosh
- Department of Veterinary Physiology, West Bengal University of Animal and Fishery Sciences, Kolkata 700037, India
| | - Pradip Kumar Das
- Department of Veterinary Physiology, West Bengal University of Animal and Fishery Sciences, Kolkata 700037, India
| | | | - Samit Kumar Nandi
- Department of Veterinary Surgery and Radiology, West Bengal University of Animal and Fishery Sciences, Kolkata 700037, India.
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9
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Li Y, Fraser D, Mereness J, Van Hove A, Basu S, Newman M, Benoit DSW. Tissue Engineered Neurovascularization Strategies for Craniofacial Tissue Regeneration. ACS APPLIED BIO MATERIALS 2022; 5:20-39. [PMID: 35014834 PMCID: PMC9016342 DOI: 10.1021/acsabm.1c00979] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Craniofacial tissue injuries, diseases, and defects, including those within bone, dental, and periodontal tissues and salivary glands, impact an estimated 1 billion patients globally. Craniofacial tissue dysfunction significantly reduces quality of life, and successful repair of damaged tissues remains a significant challenge. Blood vessels and nerves are colocalized within craniofacial tissues and act synergistically during tissue regeneration. Therefore, the success of craniofacial regenerative approaches is predicated on successful recruitment, regeneration, or integration of both vascularization and innervation. Tissue engineering strategies have been widely used to encourage vascularization and, more recently, to improve innervation through host tissue recruitment or prevascularization/innervation of engineered tissues. However, current scaffold designs and cell or growth factor delivery approaches often fail to synergistically coordinate both vascularization and innervation to orchestrate successful tissue regeneration. Additionally, tissue engineering approaches are typically investigated separately for vascularization and innervation. Since both tissues act in concert to improve craniofacial tissue regeneration outcomes, a revised approach for development of engineered materials is required. This review aims to provide an overview of neurovascularization in craniofacial tissues and strategies to target either process thus far. Finally, key design principles are described for engineering approaches that will support both vascularization and innervation for successful craniofacial tissue regeneration.
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Affiliation(s)
- Yiming Li
- Department of Biomedical Engineering, University of Rochester, Rochester, New York 14627, United States.,Department of Orthopaedics and Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, New York 14642, United States
| | - David Fraser
- Department of Orthopaedics and Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, New York 14642, United States.,Eastman Institute for Oral Health, University of Rochester Medical Center, Rochester, New York 14620, United States.,Translational Biomedical Sciences Program, University of Rochester Medical Center, Rochester, New York 14642, United States
| | - Jared Mereness
- Department of Biomedical Engineering, University of Rochester, Rochester, New York 14627, United States.,Department of Orthopaedics and Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, New York 14642, United States.,Department of Environmental Medicine, University of Rochester Medical Center, Rochester, New York 14642, United States
| | - Amy Van Hove
- Department of Biomedical Engineering, University of Rochester, Rochester, New York 14627, United States.,Department of Orthopaedics and Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, New York 14642, United States
| | - Sayantani Basu
- Department of Biomedical Engineering, University of Rochester, Rochester, New York 14627, United States.,Department of Orthopaedics and Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, New York 14642, United States
| | - Maureen Newman
- Department of Biomedical Engineering, University of Rochester, Rochester, New York 14627, United States.,Department of Orthopaedics and Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, New York 14642, United States
| | - Danielle S W Benoit
- Department of Biomedical Engineering, University of Rochester, Rochester, New York 14627, United States.,Department of Orthopaedics and Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, New York 14642, United States.,Eastman Institute for Oral Health, University of Rochester Medical Center, Rochester, New York 14620, United States.,Translational Biomedical Sciences Program, University of Rochester Medical Center, Rochester, New York 14642, United States.,Department of Environmental Medicine, University of Rochester Medical Center, Rochester, New York 14642, United States.,Materials Science Program, University of Rochester, Rochester, New York 14627, United States.,Department of Chemical Engineering, University of Rochester, Rochester, New York 14627, United States.,Department of Biomedical Genetics and Center for Oral Biology, University of Rochester Medical Center, Rochester, New York 14642, United States
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10
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Khan J, Rudrapal M, Bhat EA, Ali A, Alaidarous M, Alshehri B, Banwas S, Ismail R, Egbuna C. Perspective Insights to Bio-Nanomaterials for the Treatment of Neurological Disorders. Front Bioeng Biotechnol 2021; 9:724158. [PMID: 34712651 PMCID: PMC8546296 DOI: 10.3389/fbioe.2021.724158] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 09/20/2021] [Indexed: 12/25/2022] Open
Abstract
The significance of biomaterials is well appreciated in nanotechnology, and its use has resulted in major advances in biomedical sciences. Although, currently, very little data is available on the clinical trial studies for treatment of neurological conditions, numerous promising advancements have been reported in drug delivery and regenerative therapies which can be applied in clinical practice. Among the commonly reported biomaterials in literature, the self-assembling peptides and hydrogels have been recognized as the most potential candidate for treatment of common neurological conditions such as Alzheimer's, Parkinson's, spinal cord injury, stroke and tumors. The hydrogels, specifically, offer advantages like flexibility and porosity, and mimics the properties of the extracellular matrix of the central nervous system. These factors make them an ideal scaffold for drug delivery through the blood-brain barrier and tissue regeneration (using stem cells). Thus, the use of biomaterials as suitable matrix for therapeutic purposes has emerged as a promising area of neurosciences. In this review, we describe the application of biomaterials, and the current advances, in treatment of statistically common neurological disorders.
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Affiliation(s)
- Johra Khan
- Department of Medical Laboratory Sciences, College of Applied Medical Sciences, Majmaah University, Al Majmaah, Saudi Arabia
- Health and Basic Sciences Research Center, Majmaah University, Majmaah, Saudi Arabia
| | - Mithun Rudrapal
- Rasiklal M. Dhariwal Institute of Pharmaceutical Education & Research, Pune, India
| | - Eijaz Ahmed Bhat
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology, Kanpur, India
| | - Ahmad Ali
- Department of Life Sciences, University of Mumbai, Mumbai, India
| | - Mohammad Alaidarous
- Department of Medical Laboratory Sciences, College of Applied Medical Sciences, Majmaah University, Al Majmaah, Saudi Arabia
- Health and Basic Sciences Research Center, Majmaah University, Majmaah, Saudi Arabia
| | - Bader Alshehri
- Department of Medical Laboratory Sciences, College of Applied Medical Sciences, Majmaah University, Al Majmaah, Saudi Arabia
- Health and Basic Sciences Research Center, Majmaah University, Majmaah, Saudi Arabia
| | - Saeed Banwas
- Department of Medical Laboratory Sciences, College of Applied Medical Sciences, Majmaah University, Al Majmaah, Saudi Arabia
- Health and Basic Sciences Research Center, Majmaah University, Majmaah, Saudi Arabia
- Department of Biomedical Sciences, Oregon State University, Corvallis, OR, United States
| | - Randa Ismail
- Department of Medical Laboratory Sciences, College of Applied Medical Sciences, Majmaah University, Al Majmaah, Saudi Arabia
- Health and Basic Sciences Research Center, Majmaah University, Majmaah, Saudi Arabia
| | - Chukwuebuka Egbuna
- World Bank Africa Centre of Excellence in Public Health and Toxicological Research (PUTOR), University of Port Harcourt, Port Harcourt, Nigeria
- Department of Biochemistry, University of Port Harcourt, Port Harcourt, Nigeria
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11
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Mechanical
and biological performance of rainbow trout collagen‐boron nitride nanocomposite scaffolds for soft tissue engineering. J Appl Polym Sci 2021. [DOI: 10.1002/app.50664] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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12
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Li XH, Zhu X, Liu XY, Xu HH, Jiang W, Wang JJ, Chen F, Zhang S, Li RX, Chen XY, Tu Y. The corticospinal tract structure of collagen/silk fibroin scaffold implants using 3D printing promotes functional recovery after complete spinal cord transection in rats. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2021; 32:31. [PMID: 33751254 PMCID: PMC7985105 DOI: 10.1007/s10856-021-06500-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 02/22/2021] [Indexed: 06/12/2023]
Abstract
No effective treatment has been established for nerve dysfunction caused by spinal cord injury (SCI). Orderly axonal growth at the site of spinal cord transection and creation of an appropriate biological microenvironment are important for functional recovery. To axially guiding axonal growth, designing a collagen/silk fibroin scaffold fabricated with 3D printing technology (3D-C/SF) emulated the corticospinal tract. The normal collagen/silk fibroin scaffold with freeze-drying technology (C/SF) or 3D-C/SF scaffold were implanted into rats with completely transected SCI to evaluate its effect on nerve repair during an 8-week observation period. Electrophysiological analysis and locomotor performance showed that the 3D-C/SF implants contributed to significant improvements in the neurogolical function of rats compared to C/SF group. By magnetic resonance imaging, 3D-C/SF implants promoted a striking degree of axonal regeneration and connection between the proximal and distal SCI sites. Compared with C/SF group, rats with 3D-C/SF scaffold exhibited fewer lesions and disordered structures in histological analysis and more GAP43-positive profiles at the lesion site. The above results indicated that the corticospinal tract structure of 3D printing collagen/silk fibroin scaffold improved axonal regeneration and promoted orderly connections within the neural network, which could provided a promising and innovative approach for tissue repair after SCI.
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Affiliation(s)
- Xiao-Hong Li
- Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin, 300072, China
| | - Xiang Zhu
- Tianjin Key Laboratory of Neurotrauma Repair, Pingjin Hospital Brain Center, Characteristic Medical Center of PAPF, Tianjin, 300162, China
- Henan provincial people's hospital of southeast branch, Zhu ma dian, 463500, China
| | - Xiao-Yin Liu
- Tianjin Key Laboratory of Neurotrauma Repair, Pingjin Hospital Brain Center, Characteristic Medical Center of PAPF, Tianjin, 300162, China
- Tianjin Medical University, Tianjin, 300070, China
| | - Hai-Huan Xu
- Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin, 300072, China
- Tianjin Key Laboratory of Neurotrauma Repair, Pingjin Hospital Brain Center, Characteristic Medical Center of PAPF, Tianjin, 300162, China
| | - Wei Jiang
- Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin, 300072, China
| | - Jing-Jing Wang
- Tianjin Key Laboratory of Neurotrauma Repair, Pingjin Hospital Brain Center, Characteristic Medical Center of PAPF, Tianjin, 300162, China
| | - Feng Chen
- Tianjin Key Laboratory of Neurotrauma Repair, Pingjin Hospital Brain Center, Characteristic Medical Center of PAPF, Tianjin, 300162, China
| | - Sai Zhang
- Tianjin Key Laboratory of Neurotrauma Repair, Pingjin Hospital Brain Center, Characteristic Medical Center of PAPF, Tianjin, 300162, China
- Emergency Medical Center, Beijing Chaoyang Integrative medicine, Beijing, 100191, China
| | - Rui-Xin Li
- Central Laboratory, Tianjin Stomatological Hospital, Tianjin, 300041, China.
| | - Xu-Yi Chen
- Tianjin Key Laboratory of Neurotrauma Repair, Pingjin Hospital Brain Center, Characteristic Medical Center of PAPF, Tianjin, 300162, China.
| | - Yue Tu
- Tianjin Key Laboratory of Neurotrauma Repair, Pingjin Hospital Brain Center, Characteristic Medical Center of PAPF, Tianjin, 300162, China.
- Emergency Medical Center, Beijing Chaoyang Integrative medicine, Beijing, 100191, China.
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13
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Jiang J, Dai C, Liu X, Dai L, Li R, Ma K, Xu H, Zhao F, Zhang Z, He T, Niu X, Chen X, Zhang S. Implantation of regenerative complexes in traumatic brain injury canine models enhances the reconstruction of neural networks and motor function recovery. Am J Cancer Res 2021; 11:768-788. [PMID: 33391504 PMCID: PMC7738861 DOI: 10.7150/thno.50540] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Accepted: 10/13/2020] [Indexed: 02/05/2023] Open
Abstract
Rationale: The combination of medical and tissue engineering in neural regeneration studies is a promising field. Collagen, silk fibroin and seed cells are suitable options and have been widely used in the repair of spinal cord injury. In this study, we aimed to determine whether the implantation of a complex fabricated with collagen/silk fibroin (SF) and the human umbilical cord mesenchymal stem cells (hUCMSCs) can promote cerebral cortex repair and motor functional recovery in a canine model of traumatic brain injury (TBI). Methods: A porous scaffold was fabricated with cross-linked collagen and SF. Its physical properties and degeneration rate were measured. The scaffolds were co-cultured with hUCMSCs after which an implantable complex was formed. After complex implantation to a canine model of TBI, the motor evoked potential (MEP) and magnetic resonance imaging (MRI) were used to evaluate the integrity of the cerebral cortex. The neurologic score, motion capture, surface electromyography (sEMG), and vertical ground reaction force (vGRF) were measured in the analysis of motor functions. In vitro analysis of inflammation levels was performed by Elisa while immunohistochemistry was used in track the fate of hUCMSCs. In situ hybridization, transmission electron microscope, and immunofluorescence were used to assess neural and vascular regeneration. Results: Favorable physical properties, suitable degradation rate, and biocompatibility were observed in the collagen/SF scaffolds. The group with complex implantation exhibited the best cerebral cortex integrity and motor functions. The implantation also led to the regeneration of more blood vessels and nerve fibers, less glial fibers, and inflammatory factors. Conclusion: Implantation of this complex enhanced therapy in traumatic brain injury (TBI) through structural repair and functional recovery. These effects exhibit the translational prospects for the clinical application of this complex.
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14
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Silk Nanofibrous Electrospun Scaffold Amplifies Proliferation and Stemness Profile of Mouse Spermatogonial Stem Cells. REGENERATIVE ENGINEERING AND TRANSLATIONAL MEDICINE 2020. [DOI: 10.1007/s40883-020-00189-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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15
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Meena P, Kakkar A, Kumar M, Khatri N, Nagar RK, Singh A, Malhotra P, Shukla M, Saraswat SK, Srivastava S, Datt R, Pandey S. Advances and clinical challenges for translating nerve conduit technology from bench to bed side for peripheral nerve repair. Cell Tissue Res 2020; 383:617-644. [PMID: 33201351 DOI: 10.1007/s00441-020-03301-x] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Accepted: 09/14/2020] [Indexed: 12/19/2022]
Abstract
Injuries to the peripheral nervous system remain a large-scale clinical problem. These injuries often lead to loss of motor and/or sensory function that significantly affects patients' quality of life. The current neurosurgical approach for peripheral nerve repair involves autologous nerve transplantation, which often leads to clinical complications. The most pressing need is to increase the regenerative capacity of existing tubular constructs in the repair of large nerve gaps through development of tissue-engineered approaches that can surpass the performance of autografts. To fully realize the clinical potential of nerve conduit technology, there is a need to reconsider design strategies, biomaterial selection, fabrication techniques and the various potential modifications to optimize a conduit microenvironment that can best mimic the natural process of regeneration. In recent years, a significant progress has been made in the designing and functionality of bioengineered nerve conduits to bridge long peripheral nerve gaps in various animal models. However, translation of this work from lab to commercial scale has not been achieve. The current review summarizes recent advances in the development of tissue engineered nerve guidance conduits (NGCs) with regard to choice of material, novel fabrication methods, surface modifications and regenerative cues such as stem cells and growth factors to improve regeneration performance. Also, the current clinical potential and future perspectives to achieve therapeutic benefits of NGCs will be discussed in context of peripheral nerve regeneration.
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Affiliation(s)
- Poonam Meena
- Department of Life Sciences, Datt Mediproducts Pvt. Ltd., Roz Ka Meo Industrial Area, District Mewat, Nuh, 122103, District Haryana, India
| | - Anupama Kakkar
- Department of Life Sciences, Datt Mediproducts Pvt. Ltd., Roz Ka Meo Industrial Area, District Mewat, Nuh, 122103, District Haryana, India
| | - Mukesh Kumar
- Department of Life Sciences, Datt Mediproducts Pvt. Ltd., Roz Ka Meo Industrial Area, District Mewat, Nuh, 122103, District Haryana, India
| | - Nitin Khatri
- Department of Life Sciences, Datt Mediproducts Pvt. Ltd., Roz Ka Meo Industrial Area, District Mewat, Nuh, 122103, District Haryana, India
| | - Rakesh Kumar Nagar
- Department of Life Sciences, Datt Mediproducts Pvt. Ltd., Roz Ka Meo Industrial Area, District Mewat, Nuh, 122103, District Haryana, India
| | - Aarti Singh
- Department of Life Sciences, Datt Mediproducts Pvt. Ltd., Roz Ka Meo Industrial Area, District Mewat, Nuh, 122103, District Haryana, India
| | - Poonam Malhotra
- Department of Life Sciences, Datt Mediproducts Pvt. Ltd., Roz Ka Meo Industrial Area, District Mewat, Nuh, 122103, District Haryana, India
| | - Manish Shukla
- Department of Life Sciences, Datt Mediproducts Pvt. Ltd., Roz Ka Meo Industrial Area, District Mewat, Nuh, 122103, District Haryana, India
| | - Sumit Kumar Saraswat
- Department of Life Sciences, Datt Mediproducts Pvt. Ltd., Roz Ka Meo Industrial Area, District Mewat, Nuh, 122103, District Haryana, India
| | - Supriya Srivastava
- Department of Life Sciences, Datt Mediproducts Pvt. Ltd., Roz Ka Meo Industrial Area, District Mewat, Nuh, 122103, District Haryana, India
| | - Rajan Datt
- Department of Life Sciences, Datt Mediproducts Pvt. Ltd., Roz Ka Meo Industrial Area, District Mewat, Nuh, 122103, District Haryana, India
| | - Siddharth Pandey
- Department of Life Sciences, Datt Mediproducts Pvt. Ltd., Roz Ka Meo Industrial Area, District Mewat, Nuh, 122103, District Haryana, India.
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16
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Rhode SC, Beier JP, Ruhl T. Adipose tissue stem cells in peripheral nerve regeneration-In vitro and in vivo. J Neurosci Res 2020; 99:545-560. [PMID: 33070351 DOI: 10.1002/jnr.24738] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 09/16/2020] [Accepted: 09/30/2020] [Indexed: 12/12/2022]
Abstract
After peripheral nerve injury, Schwann cells (SCs) are crucially involved in several steps of the subsequent regenerative processes, such as the Wallerian degeneration. They promote lysis and phagocytosis of myelin, secrete numbers of neurotrophic factors and cytokines, and recruit macrophages for a biological debridement. However, nerve injuries with a defect size of >1 cm do not show proper tissue regeneration and require a surgical nerve gap reconstruction. To find a sufficient alternative to the current gold standard-the autologous nerve transplant-several cell-based therapies have been developed and were experimentally investigated. One approach aims on the use of adipose tissue stem cells (ASCs). These are multipotent mesenchymal stromal cells that can differentiate into multiple phenotypes along the mesodermal lineage, such as osteoblasts, chondrocytes, and myocytes. Furthermore, ASCs also possess neurotrophic features, that is, they secrete neurotrophic factors like the nerve growth factor, brain-derived neurotrophic factor, neurotrophin-3, ciliary neurotrophic factor, glial cell-derived neurotrophic factor, and artemin. They can also differentiate into the so-called Schwann cell-like cells (SCLCs). These cells share features with naturally occurring SCs, as they also promote nerve regeneration in the periphery. This review gives a comprehensive overview of the use of ASCs in peripheral nerve regeneration and peripheral nerve tissue engineering both in vitro and in vivo. While the sustainability of differentiation of ASCs to SCLCs in vivo is still questionable, ASCs used with different nerve conduits, such as hydrogels or silk fibers, have been shown to promote nerve regeneration.
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Affiliation(s)
- Sophie Charlotte Rhode
- Department of Plastic Surgery, Hand Surgery and Burn Center, University Hospital RWTH Aachen, Aachen, Germany
| | - Justus Patrick Beier
- Department of Plastic Surgery, Hand Surgery and Burn Center, University Hospital RWTH Aachen, Aachen, Germany
| | - Tim Ruhl
- Department of Plastic Surgery, Hand Surgery and Burn Center, University Hospital RWTH Aachen, Aachen, Germany
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17
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Fornasari BE, Carta G, Gambarotta G, Raimondo S. Natural-Based Biomaterials for Peripheral Nerve Injury Repair. Front Bioeng Biotechnol 2020; 8:554257. [PMID: 33178670 PMCID: PMC7596179 DOI: 10.3389/fbioe.2020.554257] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 09/23/2020] [Indexed: 01/18/2023] Open
Abstract
Peripheral nerve injury treatment is a relevant problem because of nerve lesion high incidence and because of unsatisfactory regeneration after severe injuries, thus resulting in a reduced patient's life quality. To repair severe nerve injuries characterized by substance loss and to improve the regeneration outcome at both motor and sensory level, different strategies have been investigated. Although autograft remains the gold standard technique, a growing number of research articles concerning nerve conduit use has been reported in the last years. Nerve conduits aim to overcome autograft disadvantages, but they must satisfy some requirements to be suitable for nerve repair. A universal ideal conduit does not exist, since conduit properties have to be evaluated case by case; nevertheless, because of their high biocompatibility and biodegradability, natural-based biomaterials have great potentiality to be used to produce nerve guides. Although they share many characteristics with synthetic biomaterials, natural-based biomaterials should also be preferable because of their extraction sources; indeed, these biomaterials are obtained from different renewable sources or food waste, thus reducing environmental impact and enhancing sustainability in comparison to synthetic ones. This review reports the strengths and weaknesses of natural-based biomaterials used for manufacturing peripheral nerve conduits, analyzing the interactions between natural-based biomaterials and biological environment. Particular attention was paid to the description of the preclinical outcome of nerve regeneration in injury repaired with the different natural-based conduits.
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Affiliation(s)
- Benedetta E Fornasari
- Department of Clinical and Biological Sciences, University of Turin, Turin, Italy.,Neuroscience Institute Cavalieri Ottolenghi, University of Turin, Turin, Italy
| | - Giacomo Carta
- Department of Clinical and Biological Sciences, University of Turin, Turin, Italy.,Neuroscience Institute Cavalieri Ottolenghi, University of Turin, Turin, Italy
| | - Giovanna Gambarotta
- Department of Clinical and Biological Sciences, University of Turin, Turin, Italy.,Neuroscience Institute Cavalieri Ottolenghi, University of Turin, Turin, Italy
| | - Stefania Raimondo
- Department of Clinical and Biological Sciences, University of Turin, Turin, Italy.,Neuroscience Institute Cavalieri Ottolenghi, University of Turin, Turin, Italy
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18
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Functionalized nerve conduits for peripheral nerve regeneration: A literature review. HAND SURGERY & REHABILITATION 2020; 39:343-351. [PMID: 32485240 DOI: 10.1016/j.hansur.2020.05.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Revised: 05/21/2020] [Accepted: 05/26/2020] [Indexed: 12/17/2022]
Abstract
Functionalized neurotube are a third-generation of conduits with chemical or architectural bioactivity developed for axonal proliferation. The goal of this review is to provide a synopsis of the functionalized nerve conduits described in the literature according to their chemical and architectural properties and answer two questions: what are their mechanisms of action? Has their efficacy been proven compared to the autologous nerve graft? Our literature review relates all kind of conduits corresponding to functionalized neurotubes in peripheral nerve regeneration found in Medline and PubMed Central. Studies developing nerve gaps, chemotactic or structural features promoting each conduit, results, efficiency were selected. Fifty-five studies were selected and classified in: (a) intraluminal neurotrophic factors; (b) cell-based therapy (combined-in-vein muscles, amniotic membrane, Schwann cells, stem cells); (c) extracellular matrix proteins; (d) tissue engineering; (e) bioimplants. Functionalized neurotubes showed significantly better functional results than after end-to-end nerve suture. No studies can be able to show that neurotube results were better than autologous nerve graft results. We included all studies regardless of effectives to evaluate quality of reinnervation with modern tubulization. Functionalized neurotubes promote basic conduits for peripheral nerve regeneration. Thanks to bioengineering and microsurgery improvement, further neurotubes could promote best level of regeneration and functional recovery to successfully bridge a critical nerve gap.
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19
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Gallo N, Lunetti P, Bettini S, Barca A, Madaghiele M, Valli L, Capobianco L, Sannino A, Salvatore L. Assessment of physico-chemical and biological properties of sericin-collagen substrates for PNS regeneration. INT J POLYM MATER PO 2020. [DOI: 10.1080/00914037.2020.1725755] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Nunzia Gallo
- Department of Engineering for Innovation, University of Salento, Lecce, Italy
| | - Paola Lunetti
- Department of Engineering for Innovation, University of Salento, Lecce, Italy
| | - Simona Bettini
- Department of Engineering for Innovation, University of Salento, Lecce, Italy
| | - Amilcare Barca
- Department of Biological and Environmental Sciences and Technologies, University of Salento, Lecce, Italy
| | - Marta Madaghiele
- Department of Engineering for Innovation, University of Salento, Lecce, Italy
| | - Ludovico Valli
- Department of Biological and Environmental Sciences and Technologies, University of Salento, Lecce, Italy
| | - Loredana Capobianco
- Department of Biological and Environmental Sciences and Technologies, University of Salento, Lecce, Italy
| | - Alessandro Sannino
- Department of Engineering for Innovation, University of Salento, Lecce, Italy
| | - Luca Salvatore
- Department of Engineering for Innovation, University of Salento, Lecce, Italy
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20
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Ashraf R, Sofi HS, Sheikh FA. Experimental Protocol of MSC Differentiation into Neural Lineage for Nerve Tissue Regeneration Using Polymeric Scaffolds. Methods Mol Biol 2020; 2125:109-117. [PMID: 31020638 DOI: 10.1007/7651_2019_229] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The treatment of neurodegenerative diseases is still a challenging grindstone in reconstructive surgeries and regenerative medicine. The retention of mesenchymal stem cells (MSCs) to retain remarkable properties of differentiating into motor neuron-like cells and Schwann cells can prove to be effective in repairing disorders. Moreover, the ultrafine electrospun nanofibers provide a favorable and conducive platform for proliferation and differentiation of MSCs. The development of new 3D culture methods with electrospun scaffolds that closely mimic the physiological niche of cells will help us to understand the functional benefits of MSCs in regeneration process. This article highlights the protocols for isolation of MSCs from rat bone marrow and their subsequent culture on nanofiber scaffolds. Furthermore, this chapter summarizes the various procedures including isolation of the MSCs, their seeding on electrospun nanofibrous scaffolds, and their proliferation and differentiation into neural lineage upon appropriate induction. The materials and preparation of various reagents used at different steps of the protocol are also summarized in detail.
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Affiliation(s)
- Roqia Ashraf
- Department of Nanotechnology, University of Kashmir, Srinagar, Jammu and Kashmir, India
| | - Hasham S Sofi
- Department of Nanotechnology, University of Kashmir, Srinagar, Jammu and Kashmir, India
| | - Faheem A Sheikh
- Department of Nanotechnology, University of Kashmir, Srinagar, Jammu and Kashmir, India.
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21
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Jiang JP, Liu XY, Zhao F, Zhu X, Li XY, Niu XG, Yao ZT, Dai C, Xu HY, Ma K, Chen XY, Zhang S. Three-dimensional bioprinting collagen/silk fibroin scaffold combined with neural stem cells promotes nerve regeneration after spinal cord injury. Neural Regen Res 2020; 15:959-968. [PMID: 31719263 DOI: 10.4103/1673-5374.268974] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Many studies have shown that bio-scaffolds have important value for promoting axonal regeneration of injured spinal cord. Indeed, cell transplantation and bio-scaffold implantation are considered to be effective methods for neural regeneration. This study was designed to fabricate a type of three-dimensional collagen/silk fibroin scaffold (3D-CF) with cavities that simulate the anatomy of normal spinal cord. This scaffold allows cell growth in vitro and in vivo. To observe the effects of combined transplantation of neural stem cells (NSCs) and 3D-CF on the repair of spinal cord injury. Forty Sprague-Dawley rats were divided into four groups: sham (only laminectomy was performed), spinal cord injury (transection injury of T10 spinal cord without any transplantation), 3D-CF (3D scaffold was transplanted into the local injured cavity), and 3D-CF + NSCs (3D scaffold co-cultured with NSCs was transplanted into the local injured cavity. Neuroelectrophysiology, imaging, hematoxylin-eosin staining, argentaffin staining, immunofluorescence staining, and western blot assay were performed. Apart from the sham group, neurological scores were significantly higher in the 3D-CF + NSCs group compared with other groups. Moreover, latency of the 3D-CF + NSCs group was significantly reduced, while the amplitude was significantly increased in motor evoked potential tests. The results of magnetic resonance imaging and diffusion tensor imaging showed that both spinal cord continuity and the filling of injury cavity were the best in the 3D-CF + NSCs group. Moreover, regenerative axons were abundant and glial scarring was reduced in the 3D-CF + NSCs group compared with other groups. These results confirm that implantation of 3D-CF combined with NSCs can promote the repair of injured spinal cord. This study was approved by the Institutional Animal Care and Use Committee of People's Armed Police Force Medical Center in 2017 (approval No. 2017-0007.2).
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Affiliation(s)
- Ji-Peng Jiang
- Department of Thoracic Surgery, General Hospital of People's Liberation Army (PLA), Beijing; Tianjin Key Laboratory of Neurotrauma Repair, Institute of Traumatic Brain Injury and Neuroscience, Center for Neurology and Neurosurgery of Chinese People's Armed Police Force (PAP) Medical Center, Tianjin, China
| | - Xiao-Yin Liu
- Tianjin Key Laboratory of Neurotrauma Repair, Institute of Traumatic Brain Injury and Neuroscience, Center for Neurology and Neurosurgery of Chinese People's Armed Police Force (PAP) Medical Center; Tianjin Medical University, Tianjin, China
| | - Fei Zhao
- Tianjin Key Laboratory of Neurotrauma Repair, Institute of Traumatic Brain Injury and Neuroscience, Center for Neurology and Neurosurgery of Chinese People's Armed Police Force (PAP) Medical Center, Tianjin, China
| | - Xiang Zhu
- Department of Neurology, Luoyang First Hospital of Traditional Chinese Medicine, Luoyang, Henan Province, China
| | - Xiao-Yin Li
- Tianjin Key Laboratory of Neurotrauma Repair, Institute of Traumatic Brain Injury and Neuroscience, Center for Neurology and Neurosurgery of Chinese People's Armed Police Force (PAP) Medical Center, Tianjin, China
| | - Xue-Gang Niu
- Department of Neurosurgery, Fourth Central Hospital of Tianjin, Tianjin, China
| | - Zi-Tong Yao
- Tianjin Key Laboratory of Neurotrauma Repair, Institute of Traumatic Brain Injury and Neuroscience, Center for Neurology and Neurosurgery of Chinese People's Armed Police Force (PAP) Medical Center, Tianjin, China
| | - Chen Dai
- Tianjin Key Laboratory of Neurotrauma Repair, Institute of Traumatic Brain Injury and Neuroscience, Center for Neurology and Neurosurgery of Chinese People's Armed Police Force (PAP) Medical Center, Tianjin, China
| | - Hui-You Xu
- Tianjin Key Laboratory of Neurotrauma Repair, Institute of Traumatic Brain Injury and Neuroscience, Center for Neurology and Neurosurgery of Chinese People's Armed Police Force (PAP) Medical Center, Tianjin, China
| | - Ke Ma
- Tianjin Key Laboratory of Neurotrauma Repair, Institute of Traumatic Brain Injury and Neuroscience, Center for Neurology and Neurosurgery of Chinese People's Armed Police Force (PAP) Medical Center, Tianjin, China
| | - Xu-Yi Chen
- Tianjin Key Laboratory of Neurotrauma Repair, Institute of Traumatic Brain Injury and Neuroscience, Center for Neurology and Neurosurgery of Chinese People's Armed Police Force (PAP) Medical Center, Tianjin, China
| | - Sai Zhang
- Tianjin Key Laboratory of Neurotrauma Repair, Institute of Traumatic Brain Injury and Neuroscience, Center for Neurology and Neurosurgery of Chinese People's Armed Police Force (PAP) Medical Center, Tianjin, China
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22
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Bojnordi MN, Ebrahimi-Barough S, Vojoudi E, Hamidabadi HG. Silk nanofibrous electrospun scaffold enhances differentiation of embryonic stem like cells derived from testis in to mature neuron. J Biomed Mater Res A 2019; 106:2662-2669. [PMID: 29901281 DOI: 10.1002/jbm.a.36463] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Revised: 05/06/2018] [Accepted: 05/16/2018] [Indexed: 01/05/2023]
Abstract
The scaffolds accompanied with stem cells have great potential for applications in neural tissue engineering. Fabrication of nanofibrous scaffold similar to extracellular matrix is one of the applicable methods in neural tissue regeneration. The aim of this study was the fabrication of a silk nanofibrous scaffold as a microenvironment for neural guiding differentiation of embryonic stem like cells (ES Like cells) derived from testis toward neuron-like cells. ES Like derived from culturing of testicular cells in vitro, were seeded on silk scaffolds and induced to neuronal phenotype using 4-/4± RA technique following culturing the cells in the neurobasal medium supplemented with 20 ng/mL bFGF,10 ng/mL EGF, B27, and N2 for 8-12 days. The neural differentiation was confirmed via the evaluation of specific neural markers; Nestin, NF68, MAP2 and β tubulin using immunocytochemistry and real-time polymerase chain reaction. Our results showed that silk scaffold support the attachment and proliferation of ES Like cells. The expression of Nestin, NF68, Map2, and ß tubulin markers were higher in cells grown on silk scaffold in compare to monolayer group. This study suggests electrospun silk nanofibrous scaffold as an appropriate substrate for neural induction of stem cells that is applicable for repairmen of damaged neural tissues. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 106A: 2662-2669, 2018.
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Affiliation(s)
- Maryam Nazm Bojnordi
- Immunogenetic Research Center, Department of Anatomy & Cell Biology, Faculty of Medicine, Mazandaran University of Medical Sciences, P.O. Box, Sari, 48471-91971, Iran
| | - Somayeh Ebrahimi-Barough
- Department of Tissue Engineering and Applied Cell Sciences, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Elham Vojoudi
- Department of Tissue Engineering and Applied Cell Sciences, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Hatef Ghasemi Hamidabadi
- Immunogenetic Research Center, Department of Anatomy & Cell Biology, Faculty of Medicine, Mazandaran University of Medical Sciences, P.O. Box, Sari, 48471-91971, Iran
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Wu S, Ni S, Jiang X, Kuss MA, Wang HJ, Duan B. Guiding Mesenchymal Stem Cells into Myelinating Schwann Cell-Like Phenotypes by Using Electrospun Core-Sheath Nanoyarns. ACS Biomater Sci Eng 2019; 5:5284-5294. [PMID: 33455233 DOI: 10.1021/acsbiomaterials.9b00748] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Nerve guidance conduit (NGC)-infilling substrates have been reported to facilitate the regeneration of injured peripheral nerves (PNs), especially for large nerve gaps. In this study, longitudinally oriented electrospun core-sheath nanoyarns (csNYs), consisting of a polylactic acid microfiber core and an electrospun nanofiber sheath, were fabricated for potential PN tissue engineering applications. Our novel csNY displayed a well-aligned nanofibrous surface topography, resembling the ultrastructure of axons and fascicles of a native PN system, and it also provided a mechanically stable structure. The biological results showed that the csNY significantly enhanced the attachment, growth, and proliferation of human adipose derived mesenchymal stem cells (hADMSC) and also promoted the migration, proliferation, and phenotype maintenance of rabbit Schwann cells (rSCs). Our csNY notably increased the differentiation capability of hADMSC into SC-like cells (hADMSC-SC), in comparison with a 2D tissue culture polystyrene plate. More importantly, when combined with the appropriate induction medium, our csNY promoted hADMSC-SC to express high levels of myelination-associated markers. Overall, this study demonstrates that our csNYs have great potential to serve as not only ideal in vitro culture models for understanding SC-axon interaction and SC myelination but also as promising NGC-infilling substrates for PN regeneration applications.
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Affiliation(s)
- Shaohua Wu
- College of Textiles & Clothing; Collaborative Innovation Center of Marine Biomass Fibers, Qingdao University, Qingdao 266071, China
| | - Shilei Ni
- Department of Neurosurgery, Qilu Hospital of Shandong University and Institute of Brain and Brain-Inspired Science, Shandong University, Jinan 250012, China
| | | | | | | | - Bin Duan
- Department of Mechanical and Materials Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, United States
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Shrestha S, Shrestha BK, Lee J, Joong OK, Kim BS, Park CH, Kim CS. A conducting neural interface of polyurethane/silk-functionalized multiwall carbon nanotubes with enhanced mechanical strength for neuroregeneration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 102:511-523. [DOI: 10.1016/j.msec.2019.04.053] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 03/19/2019] [Accepted: 04/16/2019] [Indexed: 12/11/2022]
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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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Alessandrino A, Fregnan F, Biagiotti M, Muratori L, Bassani GA, Ronchi G, Vincoli V, Pierimarchi P, Geuna S, Freddi G. SilkBridge™: a novel biomimetic and biocompatible silk-based nerve conduit. Biomater Sci 2019; 7:4112-4130. [PMID: 31359013 DOI: 10.1039/c9bm00783k] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Silk fibroin (Bombyx mori) was used to manufacture a nerve conduit (SilkBridge™) characterized by a novel 3D architecture. The wall of the conduit consists of two electrospun layers (inner and outer) and one textile layer (middle), perfectly integrated at the structural and functional level. The manufacturing technology conferred high compression strength on the device, thus meeting clinical requirements for physiological and pathological compressive stresses. In vitro cell interaction studies were performed through direct contact assays with SilkBridge™ using the glial RT4-D6P2T cells, a schwannoma cell line, and a mouse motor neuron NSC-34 cell line. The results revealed that the material is capable of sustaining cell proliferation, that the glial RT4-D6P2T cells increased their density and organized themselves in a glial-like morphology, and that NSC-34 motor neurons exhibited a greater neuritic length with respect to the control substrate. In vivo pilot assays were performed on adult female Wistar rats. A 10 mm long gap in the median nerve was repaired with 12 mm SilkBridge™. At two weeks post-operation several cell types colonized the lumen. Cells and blood vessels were also visible between the different layers of the conduit wall. Moreover, the presence of regenerated myelinated fibers with a thin myelin sheath at the proximal level was observed. Taken together, all these results demonstrated that SilkBridge™ has an optimized balance of biomechanical and biological properties, being able to sustain a perfect cellular colonization of the conduit and the progressive growth of the regenerating nerve fibers.
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Affiliation(s)
| | - F Fregnan
- Department of Clinical and Biological Sciences, University of Torino, 10124 Torino, Italy and Neuroscience Institute Cavalieri Ottolenghi, University of Torino, 10124 Torino, Italy
| | - M Biagiotti
- Silk Biomaterials Srl, 22074 Lomazzo (Co), Italy.
| | - L Muratori
- Department of Clinical and Biological Sciences, University of Torino, 10124 Torino, Italy and Neuroscience Institute Cavalieri Ottolenghi, University of Torino, 10124 Torino, Italy
| | - G A Bassani
- Silk Biomaterials Srl, 22074 Lomazzo (Co), Italy.
| | - G Ronchi
- Department of Clinical and Biological Sciences, University of Torino, 10124 Torino, Italy and Neuroscience Institute Cavalieri Ottolenghi, University of Torino, 10124 Torino, Italy
| | - V Vincoli
- Silk Biomaterials Srl, 22074 Lomazzo (Co), Italy.
| | - P Pierimarchi
- Institute of Translational Pharmacology, National Research Council, 00083 Rome, Italy
| | - S Geuna
- Department of Clinical and Biological Sciences, University of Torino, 10124 Torino, Italy and Neuroscience Institute Cavalieri Ottolenghi, University of Torino, 10124 Torino, Italy
| | - G Freddi
- Silk Biomaterials Srl, 22074 Lomazzo (Co), Italy.
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Schwann Cell-Like Cells Derived from Human Amniotic Mesenchymal Stem Cells Promote Peripheral Nerve Regeneration through a MicroRNA-214/c-Jun Pathway. Stem Cells Int 2019; 2019:2490761. [PMID: 31354837 PMCID: PMC6636479 DOI: 10.1155/2019/2490761] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 04/08/2019] [Accepted: 04/17/2019] [Indexed: 12/18/2022] Open
Abstract
Background The use of Schwann cell-like cells (SCLCs) derived from stem cells has been introduced as an effective strategy for promoting peripheral nerve regeneration (PNR). However, molecular mechanisms underlying therapeutic transplantation of SCLCs for PNR are often ignored. Objectives To explore the potential of SCLCs for the treatment of sciatic never injury and investigate the underlying molecule mechanisms. Method SCLCs differentiated from human amniotic mesenchymal stem cells (hAMSCs) and specific markers of Schwann cells were detected. SCLCs were transplanted into the injured sites of a rat model of sciatic nerve injury, and sciatic nerve functional index (SFI) was determined. Results SCLCs expressed specific markers of Schwann cells as well as secreted neurotrophic factors. The transplantation of SCLCs into injured sites of a rat model of sciatic nerve injury promoted the functional recovery. With regard to the underlying molecular mechanisms, we identified c-Jun as a negative regulator of the myelination of SCLCs. Moreover, we discovered a novel signaling transduction pathway in SCLCs; that is, miR-214 directly targets c-Jun to promote the myelination of SCLCs. Finally, we demonstrated that miR-214 upon overexpression in SCLCs enhanced the therapeutic effects of SCLCs on sciatic nerve injury. Conclusions We demonstrate that SCLCs have beneficial effect for myelination. Moreover, our results provide a previously unknown molecular basis underlying the treatment of peripheral nerve injury with SCLCs and also offer a practical strategy for future therapeutic promotion of PNR.
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Pyatin VF, Tuturov AO. [Significance of the composition of conduit internal environment for the activation of axon growth in patients with extended peripheral nerve defects]. Zh Nevrol Psikhiatr Im S S Korsakova 2019; 119:100-105. [PMID: 31156230 DOI: 10.17116/jnevro2019119041100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The recovery of peripheral nerves after injury is an urgent medical problem. Despite the advances in microsurgery techniques, it is still not possible to achieve complete holistic and functional recovery. It is more difficult to repair neural tissue after injury if there is a diastasis between the injured ends nerves. In this case, neurorraphy can not be carried out due to the eruption of the filaments in tension and convergence of proximal and distal ends of the axon. Modern tactics of restoration of extended defects of nerves involves the use of conduits - cylindrical conductors, overlapping posttraumatic diastasis, in order to create a vector of regeneration from the proximal part of the nerve to the distal. An ideal conduit should contain an internal environment that stimulates the recovery processes of nerve fibers. At present, there is no unified approach involving the use of a certain natural or artificial conduit environment. The review analyzes the regenerative potential of the internal environments of conduits as the most promising in modern biotechnologies for the reconstruction of extended peripheral nerve defects.
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Affiliation(s)
- V F Pyatin
- Samara State Medical University, Samara, Russia
| | - A O Tuturov
- Samara State Medical University, Samara, Russia
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Magaz A, Faroni A, Gough JE, Reid AJ, Li X, Blaker JJ. Bioactive Silk-Based Nerve Guidance Conduits for Augmenting Peripheral Nerve Repair. Adv Healthc Mater 2018; 7:e1800308. [PMID: 30260575 DOI: 10.1002/adhm.201800308] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2018] [Revised: 05/22/2018] [Indexed: 02/03/2023]
Abstract
Repair of peripheral nerve injuries depends upon complex biology stemming from the manifold and challenging injury-healing processes of the peripheral nervous system. While surgical treatment options are available, they tend to be characterized by poor clinical outcomes for the injured patients. This is particularly apparent in the clinical management of a nerve gap whereby nerve autograft remains the best clinical option despite numerous limitations; in addition, effective repair becomes progressively more difficult with larger gaps. Nerve conduit strategies based on tissue engineering approaches and the use of silk as scaffolding material have attracted much attention in recent years to overcome these limitations and meet the clinical demand of large gap nerve repair. This review examines the scientific advances made with silk-based conduits for peripheral nerve repair. The focus is on enhancing bioactivity of the conduits in terms of physical guidance cues, inner wall and lumen modification, and imbuing novel conductive functionalities.
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Affiliation(s)
- Adrián Magaz
- Bio‐Active Materials GroupSchool of MaterialsMSS TowerThe University of Manchester Manchester M13 9PL UK
- Institute of Materials Research and Engineering (IMRE)Agency for Science Technology and Research (A*STAR) 2 Fusionopolis, Way, Innovis #08‐03 Singapore 138634 Singapore
| | - Alessandro Faroni
- Blond McIndoe LaboratoriesDivision of Cell Matrix Biology and Regenerative MedicineSchool of Biological SciencesFaculty of Biology, Medicine and HealthThe University of ManchesterManchester Academic Health Science Centre Manchester M13 9PL UK
| | - Julie E. Gough
- School of MaterialsThe University of Manchester Manchester M13 9PL UK
| | - Adam J. Reid
- Blond McIndoe LaboratoriesDivision of Cell Matrix Biology and Regenerative MedicineSchool of Biological SciencesFaculty of Biology, Medicine and HealthThe University of ManchesterManchester Academic Health Science Centre Manchester M13 9PL UK
- Department of Plastic Surgery and BurnsWythenshawe HospitalManchester University NHS Foundation TrustManchester Academic Health Science Centre Manchester M23 9LT UK
| | - Xu Li
- Institute of Materials Research and Engineering (IMRE)Agency for Science Technology and Research (A*STAR) 2 Fusionopolis, Way, Innovis #08‐03 Singapore 138634 Singapore
| | - Jonny J. Blaker
- Bio‐Active Materials GroupSchool of MaterialsMSS TowerThe University of Manchester Manchester M13 9PL UK
- School of MaterialsThe University of Manchester Manchester M13 9PL UK
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Varma R, Aoki FG, Soon K, Karoubi G, Waddell TK. Optimal biomaterials for tracheal epithelial grafts: An in vitro systematic comparative analysis. Acta Biomater 2018; 81:146-157. [PMID: 30268918 DOI: 10.1016/j.actbio.2018.09.048] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 09/19/2018] [Accepted: 09/26/2018] [Indexed: 12/17/2022]
Abstract
Tracheal injury, stenosis, and malignancy demand tracheal reconstruction, which often fails due to the lack of a functioning epithelium. We performed an extensive comparative analysis to determine optimal biomaterials for developing tracheal epithelial grafts with mucociliary function. We screened Hyaluronan-Poly(Ethylene Glycol), Chitosan-Collagen, Collagen Vitrigel Membrane, Fibrin Glue, Silk Fibroin, and Gelatin based on various parameters including mechanical strength, bulk degradation, cell attachment, spreading, metabolic activity, focal adhesion formation, and differentiation into ciliated and goblet cells. Silk Fibroin had significantly higher tensile strength (21.23 ± 4.42 MPa), retained 50% of its mass across 5 weeks, allowed 80-100% cell spreading and increasing metabolic activity across 10 days, focal adhesion formation within 2 h, and differentiation into 5.9 ± 2.6% goblet cells. Silk Fibroin, however, led to poor ciliation, producing 5.5 ± 3.9% ciliated cells, whereas Collagen Vitrigel Membrane promoted excellent ciliation. To capitalize on the mechanical and differentiation benefits of its respective components, we developed a composite biomaterial of Silk Fibroin and Collagen Vitrigel Membrane (SF-CVM), which demonstrated enhanced maturation into 20.6 ± 1.7% ciliated and 5.6 ± 1.0% goblet cells. Development of biomaterials-based airway epithelial grafts that provide desirable mechanics and differentiation is a major step towards treatment of airway disease. STATEMENT OF SIGNIFICANCE: Tracheal blockage, injury, and malignancy greater than 50% of the adult tracheal length cannot be safely resected. Tracheal replacement is one approach, but a major cause of transplant failure is the lack of a functioning epithelium. While tissue engineering for tracheal regeneration using biomaterials is promising, there is currently no gold standard. Therefore, we performed a systematic comparative study to characterize relevant materials for generating a biomaterials-based airway epithelial graft. We developed a composite biomaterial intended for surgical implantation providing tensile strength, slow biodegradation, and optimal support for differentiation of mature epithelia. This is a significant step augmenting current state-of-the-art methods for airway surgeries, laryngeal reconstruction, and tracheal tissue engineering.
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Affiliation(s)
- Ratna Varma
- Institute for Biomaterials and Biomedical Engineering, University of Toronto, 164 College Street, Toronto, Ontario M5S 3G9, Canada; Latner Thoracic Surgery Research Laboratories and the McEwen Centre for Regenerative Medicine, Toronto General Hospital, 101 College St, Toronto, ON M5G 1L7, Canada.
| | - Fabio G Aoki
- Latner Thoracic Surgery Research Laboratories and the McEwen Centre for Regenerative Medicine, Toronto General Hospital, 101 College St, Toronto, ON M5G 1L7, Canada
| | - Kayla Soon
- Latner Thoracic Surgery Research Laboratories and the McEwen Centre for Regenerative Medicine, Toronto General Hospital, 101 College St, Toronto, ON M5G 1L7, Canada
| | - Golnaz Karoubi
- Institute for Biomaterials and Biomedical Engineering, University of Toronto, 164 College Street, Toronto, Ontario M5S 3G9, Canada; Latner Thoracic Surgery Research Laboratories and the McEwen Centre for Regenerative Medicine, Toronto General Hospital, 101 College St, Toronto, ON M5G 1L7, Canada.
| | - Thomas K Waddell
- Institute for Biomaterials and Biomedical Engineering, University of Toronto, 164 College Street, Toronto, Ontario M5S 3G9, Canada; Latner Thoracic Surgery Research Laboratories and the McEwen Centre for Regenerative Medicine, Toronto General Hospital, 101 College St, Toronto, ON M5G 1L7, Canada; Institute of Medical Science, University of Toronto, 1 King's College Circle, Toronto, ON M5S 1A8, Canada.
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Dhobale AV, Adewole DO, Chan AHW, Marinov T, Serruya MD, Kraft RH, Cullen DK. Assessing functional connectivity across 3D tissue engineered axonal tracts using calcium fluorescence imaging. J Neural Eng 2018; 15:056008. [PMID: 29855432 PMCID: PMC6999858 DOI: 10.1088/1741-2552/aac96d] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
OBJECTIVE Micro-tissue engineered neural networks (micro-TENNs) are anatomically-inspired constructs designed to structurally and functionally emulate white matter pathways in the brain. These 3D neural networks feature long axonal tracts spanning discrete neuronal populations contained within a tubular hydrogel, and are being developed to reconstruct damaged axonal pathways in the brain as well as to serve as physiologically-relevant in vitro experimental platforms. The goal of the current study was to characterize the functional properties of these neuronal and axonal networks. APPROACH Bidirectional micro-TENNs were transduced to express genetically-encoded calcium indicators, and spontaneous fluorescence activity was recorded using real-time microscopy at 20 Hz from specific regions-of-interest in the neuronal populations. Network activity patterns and functional connectivity across the axonal tracts were then assessed using various techniques from statistics and information theory including Pearson cross-correlation, phase synchronization matrices, power spectral analysis, directed transfer function, and transfer entropy. MAIN RESULTS Pearson cross-correlation, phase synchronization matrices, and power spectral analysis revealed high values of correlation and synchronicity between the spatially segregated neuronal clusters connected by axonal tracts. Specifically, phase synchronization revealed high synchronicity of >0.8 between micro-TENN regions of interest. Normalized directed transfer function and transfer entropy matrices suggested robust information flow between the neuronal populations. Time varying power spectrum analysis revealed the strength of information propagation at various frequencies. Signal power strength was visible at elevated peak levels for dominant delta (1-4 Hz) and theta (4-8 Hz) frequency bands and progressively weakened at higher frequencies. These signal power strength results closely matched normalized directed transfer function analysis where near synchronous information flow was detected between frequencies of 2-5 Hz. SIGNIFICANCE To our knowledge, this is the first report using directed transfer function and transfer entropy methods based on fluorescent calcium activity to estimate functional connectivity of distinct neuronal populations via long-projecting, 3D axonal tracts in vitro. These functional data will further improve the design and optimization of implantable neural networks that could ultimately be deployed to reconstruct the nervous system to treat neurological disease and injury.
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Affiliation(s)
- Anjali Vijay Dhobale
- The Penn State Computational Biomechanics Group, The Pennsylvania State University, University Park, PA, USA
| | - Dayo O. Adewole
- Center for Brain Injury & Repair, Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
- Center for Neurotrauma, Neurodegeneration & Restoration, Corporal Michael J. Crescenz Veterans Affairs Medical Center, Philadelphia, PA, USA
- Department of Bioengineering, School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, PA, USA
| | - Andy Ho Wing Chan
- Department of Neurology and Sidney Kimmel Medical College at Thomas Jefferson University, Philadelphia, PA, USA
| | - Toma Marinov
- The Penn State Computational Biomechanics Group, The Pennsylvania State University, University Park, PA, USA
| | - Mijail D. Serruya
- Center for Neurotrauma, Neurodegeneration & Restoration, Corporal Michael J. Crescenz Veterans Affairs Medical Center, Philadelphia, PA, USA
- Department of Neurology and Sidney Kimmel Medical College at Thomas Jefferson University, Philadelphia, PA, USA
| | - Reuben H. Kraft
- The Penn State Computational Biomechanics Group, The Pennsylvania State University, University Park, PA, USA
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA, USA
| | - D. Kacy Cullen
- Center for Brain Injury & Repair, Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
- Center for Neurotrauma, Neurodegeneration & Restoration, Corporal Michael J. Crescenz Veterans Affairs Medical Center, Philadelphia, PA, USA
- Department of Bioengineering, School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, PA, USA
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Patel NP, Lyon KA, Huang JH. An update-tissue engineered nerve grafts for the repair of peripheral nerve injuries. Neural Regen Res 2018; 13. [PMID: 29862995 PMCID: PMC5998615 DOI: 10.4103/1673-5374.232458&set/a 867090256+860769923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023] Open
Abstract
Peripheral nerve injuries (PNI) are caused by a range of etiologies and result in a broad spectrum of disability. While nerve autografts are the current gold standard for the reconstruction of extensive nerve damage, the limited supply of autologous nerve and complications associated with harvesting nerve from a second surgical site has driven groups from multiple disciplines, including biomedical engineering, neurosurgery, plastic surgery, and orthopedic surgery, to develop a suitable or superior alternative to autografting. Over the last couple of decades, various types of scaffolds, such as acellular nerve grafts (ANGs), nerve guidance conduits, and non-nervous tissues, have been filled with Schwann cells, stem cells, and/or neurotrophic factors to develop tissue engineered nerve grafts (TENGs). Although these have shown promising effects on peripheral nerve regeneration in experimental models, the autograft has remained the gold standard for large nerve gaps. This review provides a discussion of recent advances in the development of TENGs and their efficacy in experimental models. Specifically, TENGs have been enhanced via incorporation of genetically engineered cells, methods to improve stem cell survival and differentiation, optimized delivery of neurotrophic factors via drug delivery systems (DDS), co-administration of platelet-rich plasma (PRP), and pretreatment with chondroitinase ABC (Ch-ABC). Other notable advancements include conduits that have been bioengineered to mimic native nerve structure via cell-derived extracellular matrix (ECM) deposition, and the development of transplantable living nervous tissue constructs from rat and human dorsal root ganglia (DRG) neurons. Grafts composed of non-nervous tissues, such as vein, artery, and muscle, will be briefly discussed.
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Affiliation(s)
| | - Kristopher A Lyon
- Texas A&M College of Medicine; Department of Neurosurgery, Baylor Scott & White Healthcare, Temple, TX, USA
| | - Jason H Huang
- Texas A&M College of Medicine; Department of Neurosurgery, Baylor Scott & White Healthcare, Temple, TX, USA
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Zhang Y, Zuo Y, Wen S, Hu Y, Min Y. Distinctive Stress-Stiffening Responses of Regenerated Silk Fibroin Protein Polymers under Nanoscale Gap Geometries: Effect of Shear on Silk Fibroin-Based Materials. Biomacromolecules 2018; 19:1223-1233. [PMID: 29481061 DOI: 10.1021/acs.biomac.8b00070] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Interfacial dynamics, assembly processes, and changes in nanostructures and mechanical properties of Bombyx mori silk fibroin (SF) proteins under varying degrees of nanoconfinement without and with lateral shear are investigated. When only compressive confinement forces were applied, SF proteins adsorbed on the surfaces experienced conformational changes following the Alexander-de Gennes theory of polymer brushes. By contrast, when SF proteins were exposed to a simultaneous nanoconfinement and shear, remarkable changes in interaction forces were observed, displaying the second order phase transitions, which are attributed to the formation of SF micelles and globular superstructural aggregates via hierarchical assembly processes. The resultant nanostructured SF aggregates show several folds greater elastic moduli than those of SF films prepared by drop-casting and compression-only and even degummed SF fibers. Such a striking improvement in mechanical strength is ascribed to a directional organization of β-sheet nanocrystals, effectively driven by nanoconfinement and shear stress-induced stiffing and ordering mechanisms.
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Affiliation(s)
- Yuanzhong Zhang
- Department of Polymer Engineering , University of Akron , 250 South Forge Street , Akron , Ohio 44325 , United States
| | - Yuchen Zuo
- Department of Polymer Engineering , University of Akron , 250 South Forge Street , Akron , Ohio 44325 , United States
| | - Shihao Wen
- Department of Polymer Engineering , University of Akron , 250 South Forge Street , Akron , Ohio 44325 , United States
| | - Yupeng Hu
- Department of Polymer Engineering , University of Akron , 250 South Forge Street , Akron , Ohio 44325 , United States
| | - Younjin Min
- Department of Polymer Engineering , University of Akron , 250 South Forge Street , Akron , Ohio 44325 , United States
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34
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Partially oxidized polyvinyl alcohol conduitfor peripheral nerve regeneration. Sci Rep 2018; 8:604. [PMID: 29330414 PMCID: PMC5766572 DOI: 10.1038/s41598-017-19058-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Accepted: 12/15/2017] [Indexed: 01/06/2023] Open
Abstract
Surgical reconstruction of peripheral nerves injuries with wide substance-loss is still a challenge. Many studies focused on the development of artificial nerve conduits made of synthetic or biological materials but the ideal device has not yet been identified. Here, we manufactured a conduit for peripheral nerve regeneration using a novel biodegradable hydrogel we patented that is oxidized polyvinyl alcohol (OxPVA). Thus, its characteristics were compared with neat polyvinyl alcohol (PVA) and silk-fibroin (SF) conduits, through in vitro and in vivo analysis. Unlike SF, OxPVA and neat PVA scaffolds did not support SH-SY5Y adhesion and proliferation in vitro. After implantation in rat model of sciatic nerve transection, the three conduits sustained the regeneration of the injured nerve filling a gap of 5 mm in 12 weeks. Implanted animals showed a good gait recovery. Morphometric data related to the central portion of the explanted conduit interestingly highlighted a significantly better outcome for OxPVA scaffolds compared to PVA conduits in terms of axon density, also with respect to the autograft group. This study suggests the potential of our novel biomaterial for the development of conduits for clinical use in case of peripheral nerve lesions with substance loss.
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Huang J, Patel N, Lyon K. An update–tissue engineered nerve grafts for the repair of peripheral nerve injuries. Neural Regen Res 2018. [DOI: 10.4103/1673-5374.232458
expr 973353844 + 912195704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023] Open
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Patel NP, Lyon KA, Huang JH. An update-tissue engineered nerve grafts for the repair of peripheral nerve injuries. Neural Regen Res 2018; 13:764-774. [PMID: 29862995 PMCID: PMC5998615 DOI: 10.4103/1673-5374.232458] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Peripheral nerve injuries (PNI) are caused by a range of etiologies and result in a broad spectrum of disability. While nerve autografts are the current gold standard for the reconstruction of extensive nerve damage, the limited supply of autologous nerve and complications associated with harvesting nerve from a second surgical site has driven groups from multiple disciplines, including biomedical engineering, neurosurgery, plastic surgery, and orthopedic surgery, to develop a suitable or superior alternative to autografting. Over the last couple of decades, various types of scaffolds, such as acellular nerve grafts (ANGs), nerve guidance conduits, and non-nervous tissues, have been filled with Schwann cells, stem cells, and/or neurotrophic factors to develop tissue engineered nerve grafts (TENGs). Although these have shown promising effects on peripheral nerve regeneration in experimental models, the autograft has remained the gold standard for large nerve gaps. This review provides a discussion of recent advances in the development of TENGs and their efficacy in experimental models. Specifically, TENGs have been enhanced via incorporation of genetically engineered cells, methods to improve stem cell survival and differentiation, optimized delivery of neurotrophic factors via drug delivery systems (DDS), co-administration of platelet-rich plasma (PRP), and pretreatment with chondroitinase ABC (Ch-ABC). Other notable advancements include conduits that have been bioengineered to mimic native nerve structure via cell-derived extracellular matrix (ECM) deposition, and the development of transplantable living nervous tissue constructs from rat and human dorsal root ganglia (DRG) neurons. Grafts composed of non-nervous tissues, such as vein, artery, and muscle, will be briefly discussed.
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Affiliation(s)
| | - Kristopher A Lyon
- Texas A&M College of Medicine; Department of Neurosurgery, Baylor Scott & White Healthcare, Temple, TX, USA
| | - Jason H Huang
- Texas A&M College of Medicine; Department of Neurosurgery, Baylor Scott & White Healthcare, Temple, TX, USA
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Prospects of Natural Polymeric Scaffolds in Peripheral Nerve Tissue-Regeneration. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1077:501-525. [DOI: 10.1007/978-981-13-0947-2_27] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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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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Zhuang P, Sun AX, An J, Chua CK, Chew SY. 3D neural tissue models: From spheroids to bioprinting. Biomaterials 2017; 154:113-133. [PMID: 29120815 DOI: 10.1016/j.biomaterials.2017.10.002] [Citation(s) in RCA: 161] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2017] [Revised: 09/14/2017] [Accepted: 10/02/2017] [Indexed: 12/25/2022]
Abstract
Three-dimensional (3D) in vitro neural tissue models provide a better recapitulation of in vivo cell-cell and cell-extracellular matrix interactions than conventional two-dimensional (2D) cultures. Therefore, the former is believed to have great potential for both mechanistic and translational studies. In this paper, we review the recent developments in 3D in vitro neural tissue models, with a particular focus on the emerging bioprinted tissue structures. We draw on specific examples to describe the merits and limitations of each model, in terms of different applications. Bioprinting offers a revolutionary approach for constructing repeatable and controllable 3D in vitro neural tissues with diverse cell types, complex microscale features and tissue level responses. Further advances in bioprinting research would likely consolidate existing models and generate complex neural tissue structures bearing higher fidelity, which is ultimately useful for probing disease-specific mechanisms, facilitating development of novel therapeutics and promoting neural regeneration.
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Affiliation(s)
- Pei Zhuang
- Singapore Centre for 3D Printing, School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore.
| | - Alfred Xuyang Sun
- Department of Neurology, National Neuroscience Institute, 20 College Road, Singapore 169856, Singapore; Genome Institute of Singapore, 60 Biopolis Street, Singapore 138672, Singapore.
| | - Jia An
- Singapore Centre for 3D Printing, School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore.
| | - Chee Kai Chua
- Singapore Centre for 3D Printing, School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore.
| | - Sing Yian Chew
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore; Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore 308232, Singapore.
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Wang Y, Li D, Wang G, Chen L, Chen J, Liu Z, Zhang Z, Shen H, Jin Y, Shen Z. The effect of co-transplantation of nerve fibroblasts and Schwann cells on peripheral nerve repair. Int J Biol Sci 2017; 13:1507-1519. [PMID: 29230099 PMCID: PMC5723917 DOI: 10.7150/ijbs.21976] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Accepted: 09/10/2017] [Indexed: 01/27/2023] Open
Abstract
Combinations of fibroblasts (Fbs) and corresponding epithelial cells have been widely used in many tissues, such as the skin and breast tissues, to augment tissue repair and remodeling. Recently, a large amount of new data has indicated that nerve Fbs play critical roles in Schwann cells (SCs) and axons in vitro. However, little is known regarding the effects of co-transplanting nerve Fbs and SCs on peripheral nerve repair in vivo. The aim of this study was to investigate the effect of co-transplanting sciatic nerve Fbs (SN-Fbs) and sciatic nerve SCs (SN-SCs) on nerve regeneration. We developed a 5 mm nerve-defect model in mice using a polyurethane (PUR) catheter and then injected one of four different mixtures of cells into the catheters to form the following four groups: pure Matrigel (Control group), SN-Fbs alone (SN-Fb group), SN-Fbs combined with SN-SCs at a ratio of 1:2 (Fb&SC group) and SN-SCs alone (SN-SC group). Histological and functional analyses were performed 3 months later. The results indicated that in vitro, the expression levels of NGF, BDNF and GDNF were significantly higher, and in vivo, a more moderate amount of extracellular matrix was produced in the Fb&SC group than in the SN-SC group. Compared to the other groups, co-transplanting SN-Fbs with SCs at a 1:2 ratio had significantly positive effects on nerve regeneration and functional recovery.
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Affiliation(s)
- Yang Wang
- Department of Plastic and Reconstructive Surgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Dong Li
- Department of Plastic and Reconstructive Surgery, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Gangyang Wang
- Department of Plastic and Reconstructive Surgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Lulu Chen
- Plastic Surgery Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, People's Republic of China
| | - Jun Chen
- Department of Plastic and Reconstructive Surgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Zhangyin Liu
- Jiangpu Primary Health Service Center, Shanghai, People's Republic of China
| | - Zhaofeng Zhang
- Department of Plastic and Reconstructive Surgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Hua Shen
- Department of Plastic and Reconstructive Surgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Yuqing Jin
- Department of Plastic and Reconstructive Surgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Zunli Shen
- Department of Plastic and Reconstructive Surgery, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
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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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Ayala-Caminero R, Pinzón-Herrera L, Martinez CAR, Almodovar J. Polymeric scaffolds for three-dimensional culture of nerve cells: a model of peripheral nerve regeneration. MRS COMMUNICATIONS 2017; 7:391-415. [PMID: 29515936 PMCID: PMC5836791 DOI: 10.1557/mrc.2017.90] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Accepted: 08/28/2017] [Indexed: 05/09/2023]
Abstract
Understanding peripheral nerve repair requires the evaluation of 3D structures that serve as platforms for 3D cell culture. Multiple platforms for 3D cell culture have been developed, mimicking peripheral nerve growth and function, in order to study tissue repair or diseases. To recreate an appropriate 3D environment for peripheral nerve cells, key factors are to be considered including: selection of cells, polymeric biomaterials to be used, and fabrication techniques to shape and form the 3D scaffolds for cellular culture. This review focuses on polymeric 3D platforms used for the development of 3D peripheral nerve cell cultures.
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Affiliation(s)
- Radamés Ayala-Caminero
- Bioengineering Program, University of Puerto Rico Mayaguez, Call Box 9000, Mayagüez, Puerto Rico, 00681-9000, USA
| | - Luis Pinzón-Herrera
- Department of Chemical Engineering, University of Puerto Rico Mayagüez, Call Box 9000, Mayaguez, Puerto Rico, 00681-9000, USA
| | - Carol A Rivera Martinez
- Bioengineering Program, University of Puerto Rico Mayaguez, Call Box 9000, Mayagüez, Puerto Rico, 00681-9000, USA
| | - Jorge Almodovar
- Bioengineering Program, University of Puerto Rico Mayaguez, Call Box 9000, Mayagüez, Puerto Rico, 00681-9000, USA
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Kayabolen A, Keskin D, Aykan A, Karslıoglu Y, Zor F, Tezcaner A. Native extracellular matrix/fibroin hydrogels for adipose tissue engineering with enhanced vascularization. ACTA ACUST UNITED AC 2017; 12:035007. [PMID: 28361795 DOI: 10.1088/1748-605x/aa6a63] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Adipose tissue engineering is a promising field for regeneration of soft tissue defects. However, vascularization is needed since nutrients and oxygen cannot reach cells in thick implants by diffusion. Obtaining a biocompatible scaffold with good mechanical properties is another problem. In this study, we aimed to develop thick and vascularized adipose tissue constructs supporting cell viability and adipose tissue regeneration. Hydrogels were prepared by mixing rat decellularized adipose tissue (DAT) and silk fibroin (Fib) at different v/v ratios (3:1, 1:1 and 1:3) and vortexing. Gelation times decreased with increasing fibroin ratio Among hydrogel groups 1:3-DAT:Fib ratio group showed similar mechanical properties with adipose tissue. Both pre-adipocytes and pre-endothelial cells, pre-differentiated from adipose derived stem cells (ASCs), were encapsulated in hydrogels at a 1: 3 ratio. In vitro analyses showed that hydrogels with 1:3 (v/v) DAT:Fib ratio supported better cell viability. Pre-adipocytes had lipid vesicles, and pre-endothelial cells formed tubular structures inside hydrogels only after 3 days in vitro. When endothelial and adipogenic pre-differentiated ASCs (for 7 days before encapsulation) were encapsulated together into 1:3-DAT:Fib hydrogels both cell types continued to differentiate into the committed cell lineage. Vascularization process in the hydrogels implanted with adipogenic and endothelial pre-differentiated ASCs took place between the first and second week after implantation which was faster than observed in the empty hydrogels. ASCs pre-differentiated towards adipogenic lineage inside hydrogels had begun to accumulate lipid vesicles after 1 week of subcutaneous implantation Based on these results, we suggest that 1:3-DAT:Fib hydrogels with enhanced vascularization hold promise for adipose tissue engineering.
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Affiliation(s)
- Alisan Kayabolen
- Department of Biomedical Engineering, Middle East Technical University, Turkey
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Stewart DC, Rubiano A, Dyson K, Simmons CS. Mechanical characterization of human brain tumors from patients and comparison to potential surgical phantoms. PLoS One 2017; 12:e0177561. [PMID: 28582392 PMCID: PMC5459328 DOI: 10.1371/journal.pone.0177561] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Accepted: 04/28/2017] [Indexed: 11/30/2022] Open
Abstract
While mechanical properties of the brain have been investigated thoroughly, the mechanical properties of human brain tumors rarely have been directly quantified due to the complexities of acquiring human tissue. Quantifying the mechanical properties of brain tumors is a necessary prerequisite, though, to identify appropriate materials for surgical tool testing and to define target parameters for cell biology and tissue engineering applications. Since characterization methods vary widely for soft biological and synthetic materials, here, we have developed a characterization method compatible with abnormally shaped human brain tumors, mouse tumors, animal tissue and common hydrogels, which enables direct comparison among samples. Samples were tested using a custom-built millimeter-scale indenter, and resulting force-displacement data is analyzed to quantify the steady-state modulus of each sample. We have directly quantified the quasi-static mechanical properties of human brain tumors with effective moduli ranging from 0.17–16.06 kPa for various pathologies. Of the readily available and inexpensive animal tissues tested, chicken liver (steady-state modulus 0.44 ± 0.13 kPa) has similar mechanical properties to normal human brain tissue while chicken crassus gizzard muscle (steady-state modulus 3.00 ± 0.65 kPa) has similar mechanical properties to human brain tumors. Other materials frequently used to mimic brain tissue in mechanical tests, like ballistic gel and chicken breast, were found to be significantly stiffer than both normal and diseased brain tissue. We have directly compared quasi-static properties of brain tissue, brain tumors, and common mechanical surrogates, though additional tests would be required to determine more complex constitutive models.
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Affiliation(s)
- Daniel C. Stewart
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, Florida, United States of America
| | - Andrés Rubiano
- Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, Florida, United States of America
| | - Kyle Dyson
- Lillian S. Wells Department of Neurosurgery, University of Florida, Gainesville, Florida, United States of America
| | - Chelsey S. Simmons
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, Florida, United States of America
- Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, Florida, United States of America
- Division of Cardiovascular Medicine, University of Florida, Gainesville, Florida, United States of America
- * E-mail:
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Pan Y, Jiao G, Yang J, Guo R, Li J, Wang C. Insights into the Therapeutic Potential of Heparinized Collagen Scaffolds Loading Human Umbilical Cord Mesenchymal Stem Cells and Nerve Growth Factor for the Repair of Recurrent Laryngeal Nerve Injury. Tissue Eng Regen Med 2017; 14:317-326. [PMID: 30603488 DOI: 10.1007/s13770-017-0032-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2016] [Revised: 07/05/2016] [Accepted: 08/22/2016] [Indexed: 12/16/2022] Open
Abstract
Recurrent laryngeal nerve (RLN) injury can result in unilateral or bilateral vocal cords paralysis, thereby causing a series of complications, such as hoarseness and dyspnea. However, the repair of RLN remains a great challenge in current medicine. This study aimed to develop human umbilical mesenchymal stem cells (HuMSCs) and nerve growth factor (NGF)-loaded heparinized collagen scaffolds (HuMSCs/NGF HC-scaffolds) and evaluate their potential in the repair of RLN injury. HuMSCs/NGF HC-scaffolds were prepared through incorporating HuMSCs and NGF into heparinized collagen scaffolds that were prefabricated by freeze-drying in a template. The resulting scaffolds were characterized by FTIR, SEM, porosity, degradation in vitro, NGF release in vitro and bioactivity. A rabbit RLN injury model was constructed to appraise the performance of HuMSCs/NGF HC-scaffolds for nerve injury repair. Electrophysiology, histomorphology and diagnostic proteins expression for treated nerves were checked after application of various scaffolds. The results showed that the composite scaffolds with HuMSCs and NGF were rather helpful for the repair of broken RLN. The RLN treated with HuMSCs/NGF HC-scaffolds for 8 weeks produced a relatively normal electromyogram, and the levels of calcium-binding protein S100, neurofilament and AchE pertinent to nerve were found to be close to the normal ones but higher than those resulted from other scaffolds. Taken together, HuMSCs/NGF HC-scaffolds exhibited a high score on the nerve injury repair and may be valuable for the remedy of RLN injury.
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Affiliation(s)
- Yongqin Pan
- 1Department of General Surgery, First Affiliated Hospital of Jinan University, No. 613 West Huangpu Avenue, Guangzhou, 510630 People's Republic of China
| | - Genlong Jiao
- 2Department of Orthopedics, First Affiliated Hospital of Jinan University, Guangzhou, 510630 People's Republic of China
| | - Jingge Yang
- 1Department of General Surgery, First Affiliated Hospital of Jinan University, No. 613 West Huangpu Avenue, Guangzhou, 510630 People's Republic of China
| | - Rui Guo
- 3College of Life Science and Technology, Jinan University, Guangzhou, 510630 People's Republic of China
| | - Jinyi Li
- 1Department of General Surgery, First Affiliated Hospital of Jinan University, No. 613 West Huangpu Avenue, Guangzhou, 510630 People's Republic of China
| | - Cunchuan Wang
- 1Department of General Surgery, First Affiliated Hospital of Jinan University, No. 613 West Huangpu Avenue, Guangzhou, 510630 People's Republic of China
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47
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Low-temperature deposition manufacturing: A novel and promising rapid prototyping technology for the fabrication of tissue-engineered scaffold. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 70:976-982. [DOI: 10.1016/j.msec.2016.04.014] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2016] [Revised: 03/19/2016] [Accepted: 04/04/2016] [Indexed: 11/23/2022]
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May F, Buchner A, Matiasek K, Schlenker B, Stief C, Weidner N. Recovery of erectile function comparing autologous nerve grafts, unseeded conduits, Schwann-cell-seeded guidance tubes and GDNF-overexpressing Schwann cell grafts. Dis Model Mech 2016; 9:1507-1511. [PMID: 27874834 PMCID: PMC5200895 DOI: 10.1242/dmm.026518] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Accepted: 10/03/2016] [Indexed: 12/12/2022] Open
Abstract
Dissection of the cavernous nerves during radical prostatectomy for prostate cancer eliminates spontaneous erections. Using the rat as an experimental model, we compared the regenerative capacity of autologous nerve grafts and Schwann-cell-seeded nerve guides. After bilateral excision of cavernous nerve segments, cavernous nerves were reconstructed using unseeded silicon tubes, nerve autografts and silicon tubes seeded with either Glial-cell-line-derived (GDNF)-overexpressing or green fluorescent protein (GFP)-expressing Schwann cells (SCs) (16 study nerves per group). Control groups underwent either a sham operation or bilateral excision of cavernous nerve segments without repair. After 12 weeks erectile function was assessed by neurostimulation and intracavernous pressure (ICP) measurement. The reconstructed nerve segments were excised and histologically analyzed. We demonstrated an intact erectile response upon neurostimulation in 25% (4/16) of autologous nerve grafts, in 50% (8/16) of unseeded tubes, in 75% (12/16) of the Schwann-cell-GFP group and in 93.75% (15/16) of the GDNF group. ICP was significantly increased when comparing the Schwann-cell-GFP group with nerve autografts, unseeded conduits and negative controls (P<0.005). In conclusion, Schwann-cell-seeded scaffolds combined with neurotrophic factors are superior to unseeded tubes and autologous nerve grafts. They present a promising therapeutic approach for the repair of erectile nerve gaps.
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Affiliation(s)
- Florian May
- Department of Urology, Ludwig Maximilians University, Munich 81377, Germany
| | - Alexander Buchner
- Department of Urology, Ludwig Maximilians University, Munich 81377, Germany
| | - Kaspar Matiasek
- Section of Clinical and Comparative Neuropathology, Center for Clinical Veterinary Medicine, Ludwig Maximilians University, Munich 80539, Germany
| | - Boris Schlenker
- Department of Urology, Ludwig Maximilians University, Munich 81377, Germany
| | - Christian Stief
- Department of Urology, Ludwig Maximilians University, Munich 81377, Germany
| | - Norbert Weidner
- Spinal Cord Injury Center, Ruprecht Karls University, Heidelberg 69120, Germany
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Nawrotek K, Tylman M, Rudnicka K, Gatkowska J, Wieczorek M. Epineurium-mimicking chitosan conduits for peripheral nervous tissue engineering. Carbohydr Polym 2016; 152:119-128. [DOI: 10.1016/j.carbpol.2016.07.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2016] [Revised: 06/25/2016] [Accepted: 07/01/2016] [Indexed: 11/30/2022]
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50
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Zhou JF, Wang YG, Cheng L, Wu Z, Sun XD, Peng J. Preparation of polypyrrole-embedded electrospun poly(lactic acid) nanofibrous scaffolds for nerve tissue engineering. Neural Regen Res 2016; 11:1644-1652. [PMID: 27904497 PMCID: PMC5116845 DOI: 10.4103/1673-5374.193245] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/01/2016] [Indexed: 12/17/2022] Open
Abstract
Polypyrrole (PPy) is a biocompatible polymer with good conductivity. Studies combining PPy with electrospinning have been reported; however, the associated decrease in PPy conductivity has not yet been resolved. We embedded PPy into poly(lactic acid) (PLA) nanofibers via electrospinning and fabricated a PLA/PPy nanofibrous scaffold containing 15% PPy with sustained conductivity and aligned topography. There was good biocompatibility between the scaffold and human umbilical cord mesenchymal stem cells as well as Schwann cells. Additionally, the direction of cell elongation on the scaffold was parallel to the direction of fibers. Our findings suggest that the aligned PLA/PPy nanofibrous scaffold is a promising biomaterial for peripheral nerve regeneration.
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Affiliation(s)
- Jun-feng Zhou
- Key Laboratory of Advanced Materials of Ministry of Education of China, School of Materials Science and Engineering, Tsinghua University, Beijing, China
| | - Yi-guo Wang
- Institute of Orthopedics, Chinese PLA General Hospital, Beijing, China
- School of Medicine, Nankai University, Tianjin, China
| | - Liang Cheng
- Key Laboratory of Advanced Materials of Ministry of Education of China, School of Materials Science and Engineering, Tsinghua University, Beijing, China
| | - Zhao Wu
- Key Laboratory of Advanced Materials of Ministry of Education of China, School of Materials Science and Engineering, Tsinghua University, Beijing, China
| | - Xiao-dan Sun
- Key Laboratory of Advanced Materials of Ministry of Education of China, School of Materials Science and Engineering, Tsinghua University, Beijing, China
| | - Jiang Peng
- Institute of Orthopedics, Chinese PLA General Hospital, Beijing, China
- The Neural Regeneration Co-innovation Center of Jiangsu Province, Nantong, Jiangsu Province, China
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