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Zhang WJ, Liu SC, Ming LG, Yu JW, Zuo C, Hu DX, Luo HL, Zhang Q. Potential role of Schwann cells in neuropathic pain. Eur J Pharmacol 2023; 956:175955. [PMID: 37541365 DOI: 10.1016/j.ejphar.2023.175955] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 07/26/2023] [Accepted: 08/01/2023] [Indexed: 08/06/2023]
Abstract
Neuropathic pain (NPP) is a common syndrome associated with most forms of disease, which poses a serious threat to human health. NPP may persist even after the nociceptive stimulation is eliminated, and treatment is extremely challenging in such cases. Schwann cells (SCs) form the myelin sheaths around neuronal axons and play a crucial role in neural information transmission. SCs can secrete trophic factors to nourish and protect axons, and can further secrete pain-related factors to induce pain. SCs may be activated by peripheral nerve injury, triggering the transformation of myelinated and non-myelinated SCs into cell phenotypes that specifically promote repair. These differentiated SCs provide necessary signals and spatial clues for survival, axonal regeneration, and nerve regeneration of damaged neurons. They can further change the microenvironment around the regions of nerve injury, and relieve the pain by repairing the injured nerve. Herein, we provide a comprehensive overview of the biological characteristics of SCs, discuss the relationship between SCs and nerve injury, and explore the potential mechanism of SCs and the occurrence of NPP. Moreover, we summarize the feasible strategies of SCs in the treatment of NPP, and attempt to elucidate the deficiencies and defects of SCs in the treatment of NPP.
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Affiliation(s)
- Wen-Jun Zhang
- Department of Rehabilitation Medicine, The Second Affiliated Hospital, Nanchang University, Nanchang City, Jiangxi province, 343000, China
| | - Si-Cheng Liu
- Department of Gastrointestinal surgery, The Second Affiliated Hospital, Nanchang University, Nanchang City, Jiangxi province, 343000, China
| | - Li-Guo Ming
- Department of Gastrointestinal surgery, The Second Affiliated Hospital, Nanchang University, Nanchang City, Jiangxi province, 343000, China
| | - Jian-Wen Yu
- Department of Gastrointestinal surgery, The Second Affiliated Hospital, Nanchang University, Nanchang City, Jiangxi province, 343000, China
| | - Cheng Zuo
- Department of Gastrointestinal surgery, The Second Affiliated Hospital, Nanchang University, Nanchang City, Jiangxi province, 343000, China
| | - Dong-Xia Hu
- Department of Rehabilitation Medicine, The Second Affiliated Hospital, Nanchang University, Nanchang City, Jiangxi province, 343000, China
| | - Hong-Liang Luo
- Department of Gastrointestinal surgery, The Second Affiliated Hospital, Nanchang University, Nanchang City, Jiangxi province, 343000, China.
| | - Qiao Zhang
- Orthopedics Department, The Second Affiliated Hospital, Nanchang University, Nanchang City, Jiangxi province, 343000, China.
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2
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Bernard M, McOnie R, Tomlinson JE, Blum E, Prest TA, Sledziona M, Willand M, Gordon T, Borschel GH, Soletti L, Brown BN, Cheetham J. Peripheral Nerve Matrix Hydrogel Promotes Recovery after Nerve Transection and Repair. Plast Reconstr Surg 2023; 152:458e-467e. [PMID: 36946873 PMCID: PMC10461719 DOI: 10.1097/prs.0000000000010261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Accepted: 09/08/2022] [Indexed: 03/23/2023]
Abstract
BACKGROUND Nerve transection is the most common form of peripheral nerve injury. Treatment of peripheral nerve injury has primarily focused on stabilization and mechanical cues to guide extension of the regenerating growth cone across the site of transection. The authors investigated the effects of a peripheral nerve matrix (PNM) hydrogel on recovery after nerve transection. METHODS The authors used rodent models to determine the effect of PNM on axon extension, electrophysiologic nerve conduction, force generation, and neuromuscular junction formation after nerve transection and repair. The authors complemented this work with in vivo and in vitro fluorescence-activated cell sorting and immunohistochemistry approaches to determine the effects of PNM on critical cell populations early after repair. RESULTS Extension of axons from the proximal stump and overall green fluorescent protein-positive axon volume within the regenerative bridge were increased in the presence of PNM compared with an empty conduit ( P < 0.005) 21 days after repair. PNM increased electrophysiologic conduction (compound muscle action potential amplitude) across the repair site ( P < 0.05) and neuromuscular junction formation ( P = 0.04) 56 days after repair. PNM produced a shift in macrophage phenotype in vitro and in vivo ( P < 0.05) and promoted regeneration in a murine model used to characterize the early immune response to PNM ( P < 0.05). CONCLUSION PNM, delivered by subepineural injection, promoted recovery after nerve transection with immediate repair, supporting a beneficial macrophage response, axon extension, and downstream remodeling using a range of clinically relevant outcome measures. CLINICAL RELEVANCE STATEMENT This article describes an approach for subepineural injection at the site of nerve coaptation to modulate the response to injury and improve outcomes.
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Affiliation(s)
- Megan Bernard
- From the Department of Clinical Sciences, Cornell University College of Veterinary Medicine
| | - Rebecca McOnie
- From the Department of Clinical Sciences, Cornell University College of Veterinary Medicine
| | - Joy E. Tomlinson
- From the Department of Clinical Sciences, Cornell University College of Veterinary Medicine
| | - Ethan Blum
- From the Department of Clinical Sciences, Cornell University College of Veterinary Medicine
| | | | - Mike Sledziona
- From the Department of Clinical Sciences, Cornell University College of Veterinary Medicine
| | | | - Tessa Gordon
- The Hospital for Sick Children, University of Toronto
| | | | | | | | - Jonathan Cheetham
- From the Department of Clinical Sciences, Cornell University College of Veterinary Medicine
- Renerva, LLC
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3
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Yang L, Ren Z, Song P, Liu Z, Peng Z, Zhou J, Dong Q. Effects of Curcumin on Axon Growth and Myelin Sheath Formation in an In Vitro Model. Neurochem Res 2023:10.1007/s11064-023-03946-4. [PMID: 37148458 DOI: 10.1007/s11064-023-03946-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 04/20/2023] [Accepted: 05/03/2023] [Indexed: 05/08/2023]
Abstract
Although the beneficial effects of curcumin, extracted from rhizomes of the ginger family genus Curcuma, on the repair and regeneration of nerves have been evaluated in vitro, there are few studies concerning its effects on axon myelination. Here, we used pheochromocytoma cells as an in vitro model of peripheral nerves. Pheochromocytoma cells were cultured alone or cocultured with Schwann cells and treated with increasing concentrations of curcumin. Cell growth was observed, and the expression levels of growth-associated protein 43 (GAP-43), microtubule-associated protein 2 (MAP-2), myelin basic protein (MBP), myelin protein zero (MPZ), Krox-20, and octamer binding factor 6 (Oct-6) were quantified. We found a significant increase in expression of all six proteins following curcumin treatment, with a corresponding increase in the levels of MBP, MPZ, Krox-20, and Oct-6 mRNA. Upregulation was greater with increasing curcumin concentration, showing a concentration-dependent effect. The results suggested that curcumin can promote the growth of axons by upregulating the expression of GAP-43 and MAP-2, stimulate synthesis and secretion of myelin-related proteins, and facilitate formation of the myelin sheath in axons by upregulating the expression of Krox-20 and Oct-6. Therefore, curcumin could be widely applied in future strategies for the treatment of nerve injuries.
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Affiliation(s)
- Luchen Yang
- Department of Urology, Institute of Urology, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China
| | - Zhengju Ren
- Department of Urology, Institute of Urology, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China
- Department of Urology, the Second affiliated Hospital of Chongqing Medical University, Chongqing, 400010, PR China
| | - Pan Song
- Department of Urology, Institute of Urology, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China
| | - Zhenghuan Liu
- Department of Urology, Institute of Urology, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China
| | - Zhufeng Peng
- Department of Urology, Institute of Urology, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China
| | - Jing Zhou
- Department of Urology, Institute of Urology, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China
| | - Qiang Dong
- Department of Urology, Institute of Urology, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China.
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4
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Golshadi M, Claffey EF, Grenier JK, Miller A, Willand M, Edwards MG, Moore TP, Sledziona M, Gordon T, Borschel GH, Cheetham J. Delay modulates the immune response to nerve repair. NPJ Regen Med 2023; 8:12. [PMID: 36849720 PMCID: PMC9970988 DOI: 10.1038/s41536-023-00285-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 02/10/2023] [Indexed: 03/01/2023] Open
Abstract
Effective regeneration after peripheral nerve injury requires macrophage recruitment. We investigated the activation of remodeling pathways within the macrophage population when repair is delayed and identified alteration of key upstream regulators of the inflammatory response. We then targeted one of these regulators, using exogenous IL10 to manipulate the response to injury at the repair site. We demonstrate that this approach alters macrophage polarization, promotes macrophage recruitment, axon extension, neuromuscular junction formation, and increases the number of regenerating motor units reaching their target. We also demonstrate that this approach can rescue the effects of delayed nerve graft.
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Affiliation(s)
- Masoud Golshadi
- Cornell University College of Veterinary Medicine, 930 Campus Road, Ithaca, NY, 14853, USA
| | - Elaine F Claffey
- Cornell University College of Veterinary Medicine, 930 Campus Road, Ithaca, NY, 14853, USA
| | - Jennifer K Grenier
- Cornell University College of Veterinary Medicine, 930 Campus Road, Ithaca, NY, 14853, USA
| | - Andrew Miller
- Cornell University College of Veterinary Medicine, 930 Campus Road, Ithaca, NY, 14853, USA
| | - Michael Willand
- Epineuron Technologies Inc, 5100 Orbitor Dr., Mississauga, ON, L4W 5R8, Canada
| | | | - Tim P Moore
- Cornell University College of Veterinary Medicine, 930 Campus Road, Ithaca, NY, 14853, USA
| | - Michael Sledziona
- Cornell University College of Veterinary Medicine, 930 Campus Road, Ithaca, NY, 14853, USA
| | - Tessa Gordon
- Hospital for Sick Children, 555 University Ave, Toronto, ON, M5G 1×8, Canada
| | | | - Jonathan Cheetham
- Cornell University College of Veterinary Medicine, 930 Campus Road, Ithaca, NY, 14853, USA.
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5
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Reshamwala R, Shah M. Regenerative Approaches in the Nervous System. Regen Med 2023. [DOI: 10.1007/978-981-19-6008-6_11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
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6
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Functional Gait Assessment Using Manual, Semi-Automated and Deep Learning Approaches Following Standardized Models of Peripheral Nerve Injury in Mice. Biomolecules 2022; 12:biom12101355. [PMID: 36291564 PMCID: PMC9599622 DOI: 10.3390/biom12101355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 09/17/2022] [Accepted: 09/20/2022] [Indexed: 12/02/2022] Open
Abstract
Objective: To develop a standardized model of stretch−crush sciatic nerve injury in mice, and to compare outcomes of crush and novel stretch−crush injuries using standard manual gait and sensory assays, and compare them to both semi-automated as well as deep-learning gait analysis methods. Methods: Initial studies in C57/Bl6 mice were used to develop crush and stretch−crush injury models followed by histologic analysis. In total, 12 eight-week-old 129S6/SvEvTac mice were used in a six-week behavioural study. Behavioral assessments using the von Frey monofilament test and gait analysis recorded on a DigiGait platform and analyzed through both Visual Gait Lab (VGL) deep learning and standardized sciatic functional index (SFI) measurements were evaluated weekly. At the termination of the study, neurophysiological nerve conduction velocities were recorded, calf muscle weight ratios measured and histological analyses performed. Results: Histological evidence confirmed more severe histomorphological injury in the stretch−crush injured group compared to the crush-only injured group at one week post-injury. Von Frey monofilament paw withdrawal was significant for both groups at week one compared to baseline (p < 0.05), but not between groups with return to baseline at week five. SFI showed hindered gait at week one and two for both groups, compared to baseline (p < 0.0001), with return to baseline at week five. Hind stance width (HSW) showed similar trends as von Frey monofilament test as well as SFI measurements, yet hind paw angle (HPA) peaked at week two. Nerve conduction velocity (NCV), measured six weeks post-injury, at the termination of the study, did not show any significant difference between the two groups; yet, calf muscle weight measurements were significantly different between the two, with the stretch−crush group demonstrating a lower (poorer) weight ratio relative to uninjured contralateral legs (p < 0.05). Conclusion: Stretch−crush injury achieved a more reproducible and constant injury compared to crush-only injuries, with at least a Sunderland grade 3 injury (perineurial interruption) in histological samples one week post-injury in the former. However, serial behavioral outcomes were comparable between the two crush groups, with similar kinetics of recovery by von Frey testing, SFI and certain VGL parameters, the latter reported for the first time in rodent peripheral nerve injury. Semi-automated and deep learning-based approaches for gait analysis are promising, but require further validation for evaluation in murine hind-limb nerve injuries.
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7
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Su Q, Nasser MI, He J, Deng G, Ouyang Q, Zhuang D, Deng Y, Hu H, Liu N, Li Z, Zhu P, Li G. Engineered Schwann Cell-Based Therapies for Injury Peripheral Nerve Reconstruction. Front Cell Neurosci 2022; 16:865266. [PMID: 35602558 PMCID: PMC9120533 DOI: 10.3389/fncel.2022.865266] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Accepted: 04/04/2022] [Indexed: 12/12/2022] Open
Abstract
Compared with the central nervous system, the adult peripheral nervous system possesses a remarkable regenerative capacity, which is due to the strong plasticity of Schwann cells (SCs) in peripheral nerves. After peripheral nervous injury, SCs de-differentiate and transform into repair phenotypes, and play a critical role in axonal regeneration, myelin formation, and clearance of axonal and myelin debris. In view of the limited self-repair capability of SCs for long segment defects of peripheral nerve defects, it is of great clinical value to supplement SCs in necrotic areas through gene modification or stem cell transplantation or to construct tissue-engineered nerve combined with bioactive scaffolds to repair such tissue defects. Based on the developmental lineage of SCs and the gene regulation network after peripheral nerve injury (PNI), this review summarizes the possibility of using SCs constructed by the latest gene modification technology to repair PNI. The therapeutic effects of tissue-engineered nerve constructed by materials combined with Schwann cells resembles autologous transplantation, which is the gold standard for PNI repair. Therefore, this review generalizes the research progress of biomaterials combined with Schwann cells for PNI repair. Based on the difficulty of donor sources, this review also discusses the potential of “unlimited” provision of pluripotent stem cells capable of directing differentiation or transforming existing somatic cells into induced SCs. The summary of these concepts and therapeutic strategies makes it possible for SCs to be used more effectively in the repair of PNI.
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Affiliation(s)
- Qisong Su
- Medical Research Center, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
- Guangdong Provincial People’s Hospital, Guangdong Cardiovascular Institute, Guangzhou, China
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, China
| | - Moussa Ide Nasser
- Medical Research Center, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
- Guangdong Provincial People’s Hospital, Guangdong Cardiovascular Institute, Guangzhou, China
| | - Jiaming He
- School of Basic Medical Science, Shandong University, Jinan, China
| | - Gang Deng
- Guangdong Provincial People’s Hospital, Guangdong Cardiovascular Institute, Guangzhou, China
- School of Medicine, South China University of Technology, Guangzhou, China
| | - Qing Ouyang
- Guangdong Provincial People’s Hospital, Guangdong Cardiovascular Institute, Guangzhou, China
- School of Medicine, South China University of Technology, Guangzhou, China
| | - Donglin Zhuang
- Medical Research Center, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Yuzhi Deng
- Guangdong Provincial People’s Hospital, Guangdong Cardiovascular Institute, Guangzhou, China
- The First Clinical College, Guangdong Medical University, Zhanjiang, China
| | - Haoyun Hu
- Guangdong Provincial People’s Hospital, Guangdong Cardiovascular Institute, Guangzhou, China
- The First Clinical College, Guangdong Medical University, Zhanjiang, China
| | - Nanbo Liu
- Medical Research Center, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, China
| | - Zhetao Li
- Medical Research Center, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, China
| | - Ping Zhu
- Medical Research Center, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
- Guangdong Provincial People’s Hospital, Guangdong Cardiovascular Institute, Guangzhou, China
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, China
- School of Medicine, South China University of Technology, Guangzhou, China
- The First Clinical College, Guangdong Medical University, Zhanjiang, China
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Structural Heart Disease, Guangzhou, China
- *Correspondence: Ping Zhu,
| | - Ge Li
- Medical Research Center, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
- Guangdong Provincial People’s Hospital, Guangdong Cardiovascular Institute, Guangzhou, China
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, China
- Guangdong Provincial Key Laboratory of Structural Heart Disease, Guangzhou, China
- Ge Li,
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Quan Q, Hong L, Wang Y, Li R, Yin X, Cheng X, Liu G, Tang H, Meng H, Liu S, Guo Q, Lai B, Zhao Q, Wei M, Peng J, Tang P. Hybrid material mimics a hypoxic environment to promote regeneration of peripheral nerves. Biomaterials 2021; 277:121068. [PMID: 34419733 DOI: 10.1016/j.biomaterials.2021.121068] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2021] [Revised: 07/29/2021] [Accepted: 08/08/2021] [Indexed: 12/17/2022]
Abstract
Between nerve defects, a bridge formed by multiple cells is the fundamental structure for guiding axons across this damaged region. Here, we developed a functional material that mimics hypoxia during the early stages of nerve regeneration by deferoxamine. We used this material and single-cell sequencing to analyze the "bridge" structure between peripheral nerve defects. We found that hypoxia in damaged tissues might play a key role in stimulating macrophages, promoting endothelial-to-mesenchymal transition, and driving the migration of endothelial cells to the injured region to form regenerative bridge tissue and guide the subsequent regeneration of Schwann cells and axons. The results showed that the final nerve defect repair outcomes were similar with autografts after intervention by this material. This study challenges the view that hypoxia is exclusively involved in peripheral nerve regeneration and provides a potentially valuable candidate material for clinical use.
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Affiliation(s)
- Qi Quan
- Department of Orthopedic Surgery, Key Laboratory of Musculoskeletal Trauma &War Injuries PLA, Beijing Key Lab of Regenerative Medicine in Orthopedics, The 4th Medical Centre, Chinese PLA General Hospital, Beijing, China.
| | - Lei Hong
- Department of Orthopedic Surgery, Key Laboratory of Musculoskeletal Trauma &War Injuries PLA, Beijing Key Lab of Regenerative Medicine in Orthopedics, The 4th Medical Centre, Chinese PLA General Hospital, Beijing, China
| | - Yu Wang
- Department of Orthopedic Surgery, Key Laboratory of Musculoskeletal Trauma &War Injuries PLA, Beijing Key Lab of Regenerative Medicine in Orthopedics, The 4th Medical Centre, Chinese PLA General Hospital, Beijing, China; The Neural Regeneration Co-Innovation Center of Jiangsu Province, Nantong, China
| | - Rui Li
- Department of Orthopedic Surgery, Key Laboratory of Musculoskeletal Trauma &War Injuries PLA, Beijing Key Lab of Regenerative Medicine in Orthopedics, The 4th Medical Centre, Chinese PLA General Hospital, Beijing, China
| | - Xin Yin
- Department of Orthopedic Surgery, Key Laboratory of Musculoskeletal Trauma &War Injuries PLA, Beijing Key Lab of Regenerative Medicine in Orthopedics, The 4th Medical Centre, Chinese PLA General Hospital, Beijing, China
| | - Xiaoqing Cheng
- Department of Orthopedic Surgery, Key Laboratory of Musculoskeletal Trauma &War Injuries PLA, Beijing Key Lab of Regenerative Medicine in Orthopedics, The 4th Medical Centre, Chinese PLA General Hospital, Beijing, China
| | - Guangbo Liu
- Department of Orthopedic Surgery, PLA Strategic Support Force Characteristic Medical Center, China
| | - He Tang
- Beijing Anzhen Hospital, Capital Medical University, Key Laboratory of Remodeling-Related Cardiovascular Diseases, Ministry of Education, Beijing Collaborative Innovation Center for Cardiovascular Disorders, China
| | - Haoye Meng
- Department of Orthopedic Surgery, Key Laboratory of Musculoskeletal Trauma &War Injuries PLA, Beijing Key Lab of Regenerative Medicine in Orthopedics, The 4th Medical Centre, Chinese PLA General Hospital, Beijing, China
| | - Shuyun Liu
- Department of Orthopedic Surgery, Key Laboratory of Musculoskeletal Trauma &War Injuries PLA, Beijing Key Lab of Regenerative Medicine in Orthopedics, The 4th Medical Centre, Chinese PLA General Hospital, Beijing, China
| | - Quanyi Guo
- Department of Orthopedic Surgery, Key Laboratory of Musculoskeletal Trauma &War Injuries PLA, Beijing Key Lab of Regenerative Medicine in Orthopedics, The 4th Medical Centre, Chinese PLA General Hospital, Beijing, China
| | - Biqin Lai
- Key Laboratory for Stem Cells and Tissue Engineering, Sun Yat-sen University, Ministry of Education, Guangzhou, China
| | - Qing Zhao
- Department of Orthopedic Surgery, Key Laboratory of Musculoskeletal Trauma &War Injuries PLA, Beijing Key Lab of Regenerative Medicine in Orthopedics, The 4th Medical Centre, Chinese PLA General Hospital, Beijing, China
| | - Min Wei
- Department of Orthopedic Surgery, Key Laboratory of Musculoskeletal Trauma &War Injuries PLA, Beijing Key Lab of Regenerative Medicine in Orthopedics, The 4th Medical Centre, Chinese PLA General Hospital, Beijing, China.
| | - Jiang Peng
- Department of Orthopedic Surgery, Key Laboratory of Musculoskeletal Trauma &War Injuries PLA, Beijing Key Lab of Regenerative Medicine in Orthopedics, The 4th Medical Centre, Chinese PLA General Hospital, Beijing, China; The Neural Regeneration Co-Innovation Center of Jiangsu Province, Nantong, China.
| | - Peifu Tang
- Department of Orthopedic Surgery, Key Laboratory of Musculoskeletal Trauma &War Injuries PLA, Beijing Key Lab of Regenerative Medicine in Orthopedics, The 4th Medical Centre, Chinese PLA General Hospital, Beijing, China.
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9
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Evolving Techniques in Peripheral Nerve Regeneration. J Hand Surg Am 2021; 46:695-701. [PMID: 34140178 DOI: 10.1016/j.jhsa.2021.04.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Revised: 03/01/2021] [Accepted: 04/08/2021] [Indexed: 02/02/2023]
Abstract
Reliable and robust peripheral nerve regeneration after a nerve injury and repair remains an elusive goal. A variety of strategies have been proposed to mitigate the effects of Wallerian degeneration (through molecular therapies), enhance axonal regeneration across the repair site (through electrical stimulation and gene therapy), and explore alternatives to suture coaptation (through the fusion of transected ends). Although most of these techniques are in their infancy, animal data and some clinical trials have demonstrated promise for improving the restoration of function after these devastating injuries.
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10
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Pop NL, Nan A, Urda-Cimpean AE, Florea A, Toma VA, Moldovan R, Decea N, Mitrea DR, Orasan R. Chitosan Functionalized Magnetic Nanoparticles to Provide Neural Regeneration and Recovery after Experimental Model Induced Peripheral Nerve Injury. Biomolecules 2021; 11:676. [PMID: 33946445 PMCID: PMC8147170 DOI: 10.3390/biom11050676] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 04/26/2021] [Accepted: 04/28/2021] [Indexed: 12/11/2022] Open
Abstract
(1) Background: Peripheral nerve injuries have a great impact on a patient's quality of life and a generally poor outcome regarding functional recovery. Lately, studies have focused on different types of nanoparticles and various natural substances for the treatment of peripheral nerve injuries. This is the case of chitosan, a natural compound from the crustaceans' exoskeleton. The present study proposes to combine chitosan benefic properties to the nanoparticles' ability to transport different substances to specific locations and evaluate the effects of magnetic nanoparticles functionalized with chitosan (CMNPs) on peripheral nerve injuries' rehabilitation by using an in vivo experimental model. (2) Methods: CMNPs treatment was administrated daily, orally, for 21 days to rats subjected to right sciatic nerve lesion and compared to the control group (no treatment) by analyzing the sciatic functional index, pain level, body weight, serum nerve growth factor levels and histology, TEM and EDX analysis at different times during the study. (3) Results: Animals treated with CMNPs had a statistically significant functional outcome compared to the control group regarding: sciatic functional index, pain-like behavior, total body weight, which were confirmed by the histological and TEM images. (4) Conclusions: The results of the study suggest that CMNPs appear to be a promising treatment method for peripheral nerve injuries.
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Affiliation(s)
- Nadina Liana Pop
- Department of Physiology, Iuliu Hațieganu University of Medicine and Pharmacy Cluj-Napoca, Clinicilor Street No. 1-3, 400006 Cluj-Napoca, Cluj County, Romania; (N.L.P.); (R.M.); (N.D.); (R.O.)
| | - Alexandrina Nan
- National Institute for Research and Development of Isotopic and Molecular Technologies, Donath Street No. 67-103, 400293 Cluj-Napoca, Cluj County, Romania;
| | - Andrada Elena Urda-Cimpean
- Department of Informatics and Biostatistics, Iuliu Hațieganu University of Medicine and Pharmacy Cluj-Napoca, Pasteur Street No. 4-6, 400349 Cluj-Napoca, Cluj County, Romania;
| | - Adrian Florea
- Department of Cell and Molecular Biology, Iuliu Haţieganu University of Medicine and Pharmacy, Pasteur Street No. 4-6, 400349 Cluj-Napoca, Cluj County, Romania;
| | - Vlad Alexandru Toma
- Department of Molecular Biology and Biotechnologies, Babeș-Bolyai University, Clinicilor Street No. 4-6, 400000 Cluj-Napoca, Cluj County, Romania;
- Institute of Biological Research, Republicii Street No. 48, 400015 Cluj-Napoca, Cluj County, Romania
| | - Remus Moldovan
- Department of Physiology, Iuliu Hațieganu University of Medicine and Pharmacy Cluj-Napoca, Clinicilor Street No. 1-3, 400006 Cluj-Napoca, Cluj County, Romania; (N.L.P.); (R.M.); (N.D.); (R.O.)
| | - Nicoleta Decea
- Department of Physiology, Iuliu Hațieganu University of Medicine and Pharmacy Cluj-Napoca, Clinicilor Street No. 1-3, 400006 Cluj-Napoca, Cluj County, Romania; (N.L.P.); (R.M.); (N.D.); (R.O.)
| | - Daniela Rodica Mitrea
- Department of Physiology, Iuliu Hațieganu University of Medicine and Pharmacy Cluj-Napoca, Clinicilor Street No. 1-3, 400006 Cluj-Napoca, Cluj County, Romania; (N.L.P.); (R.M.); (N.D.); (R.O.)
| | - Remus Orasan
- Department of Physiology, Iuliu Hațieganu University of Medicine and Pharmacy Cluj-Napoca, Clinicilor Street No. 1-3, 400006 Cluj-Napoca, Cluj County, Romania; (N.L.P.); (R.M.); (N.D.); (R.O.)
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An S, Jia Y, Tian Y, Sun J, Wei Y, Yue S, Lin L, Wei Y, Li Y, Lei P, Zhang J, Jiang R. Mouse nerve growth factor promotes neurological recovery in patients with acute intracerebral hemorrhage: A proof-of-concept study. J Neurol Sci 2020; 418:117069. [PMID: 32798840 DOI: 10.1016/j.jns.2020.117069] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2019] [Revised: 07/16/2020] [Accepted: 07/27/2020] [Indexed: 01/06/2023]
Abstract
BACKGROUND ew drugs were confirmed to be effective in the treatments of neurological dysfunction caused by acute intracerebral hemorrhage (ICH). The present prospective clinical trial aims to evaluate the effect of mouse nerve growth factor (mNGF) on neurological function in patients with acute ICH. METHODS 60 patients with acute spontaneous ICH were randomized to receive mNGF (mNGF group) and citicoline (control group) for 4 weeks within 24-72 h after onset, respectively. The primary outcome was difference in the neurological functional outcome at 3 months by the modified Rankin Scale score (mRS). The secondary outcomes were the changes in hematoma volume at 4 weeks and 3 months. RESULTS There were 55 patients receiving treatment (29 patients in the mNGF group, 26 patients in the control group). Among the patients, 46 patients finished the trial at 3 months; the odds of a shift towards death or dependence (mRS > 3) at 3 months in the mNGF group were lower than that in the control group with adjustment for age, sex, NIHSS at admission, and hematoma volume at admission (adjusted OR, 0.185; 95%CI, 0.059-0.582; P = 0.0039). The hematoma was gradually reduced in all 46 patients and absorbed after non-surgical treatment at 3 months. There was no significant difference in hematoma volume between the two groups. No serious adverse event was found. CONCLUSIONS The administration of mNGF and citicoline was well-tolerated in patients with acute ICH. mNGF was associated with improved neurological function and less disability in patients with ICH. Therefore, the quality of life of patients with ICH may be improved by mNGF. TRIAL REGISTRATION The trial is registered with the Chinese Clinical Trial Registry, number ChiCTR1800020258.
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Affiliation(s)
- Shuo An
- Key Laboratory of Post-Neurotrauma Neurorepair and Regeneration in Central Nervous System, Ministry of Education in China and Tianjin, Tianjin Neurological Institute, Tianjin, China; Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
| | - Ying Jia
- Department of Rehabilitation Medicine, Tianjin Medical University General Hospital, Tianjin, China
| | - Ye Tian
- Key Laboratory of Post-Neurotrauma Neurorepair and Regeneration in Central Nervous System, Ministry of Education in China and Tianjin, Tianjin Neurological Institute, Tianjin, China; Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
| | - Jian Sun
- Key Laboratory of Post-Neurotrauma Neurorepair and Regeneration in Central Nervous System, Ministry of Education in China and Tianjin, Tianjin Neurological Institute, Tianjin, China; Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
| | - Yingsheng Wei
- Key Laboratory of Post-Neurotrauma Neurorepair and Regeneration in Central Nervous System, Ministry of Education in China and Tianjin, Tianjin Neurological Institute, Tianjin, China; Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
| | - Shuyuan Yue
- Key Laboratory of Post-Neurotrauma Neurorepair and Regeneration in Central Nervous System, Ministry of Education in China and Tianjin, Tianjin Neurological Institute, Tianjin, China; Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
| | - Lijuan Lin
- Department of Biostatistics, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Yongyue Wei
- Department of Biostatistics, Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Ying Li
- Key Laboratory of Post-Neurotrauma Neurorepair and Regeneration in Central Nervous System, Ministry of Education in China and Tianjin, Tianjin Neurological Institute, Tianjin, China; Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
| | - Ping Lei
- Laboratory of Neuro-Trauma and Neurodegenerative Disorders, Tianjin Geriatrics Institute, Tianjin Medical University General Hospital, Tianjin, China; Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China
| | - Jianning Zhang
- Key Laboratory of Post-Neurotrauma Neurorepair and Regeneration in Central Nervous System, Ministry of Education in China and Tianjin, Tianjin Neurological Institute, Tianjin, China; Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China.
| | - Rongcai Jiang
- Key Laboratory of Post-Neurotrauma Neurorepair and Regeneration in Central Nervous System, Ministry of Education in China and Tianjin, Tianjin Neurological Institute, Tianjin, China; Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China.
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13
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Milichko V, Dyachuk V. Novel Glial Cell Functions: Extensive Potency, Stem Cell-Like Properties, and Participation in Regeneration and Transdifferentiation. Front Cell Dev Biol 2020; 8:809. [PMID: 33015034 PMCID: PMC7461986 DOI: 10.3389/fcell.2020.00809] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Accepted: 07/31/2020] [Indexed: 12/26/2022] Open
Abstract
Glial cells are the most abundant cells in both the peripheral and central nervous systems. During the past decade, a subpopulation of immature peripheral glial cells, namely, embryonic Schwann cell-precursors, have been found to perform important functions related to development. These cells have properties resembling those of the neural crest and, depending on their location in the body, can transform into several different cell types in peripheral tissues, including autonomic neurons. This review describes the multipotent properties of Schwann cell-precursors and their importance, together with innervation, during early development. The heterogeneity of Schwann cells, as revealed using single-cell transcriptomics, raises a question on whether some glial cells in the adult peripheral nervous system retain their stem cell-like properties. We also discuss how a deeper insight into the biology of both embryonic and adult Schwann cells might lead to an effective treatment of the damage of both neural and non-neural tissues, including the damage caused by neurodegenerative diseases. Furthermore, understanding the potential involvement of Schwann cells in the regulation of tumor development may reveal novel targets for cancer treatment.
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Affiliation(s)
- Valentin Milichko
- Department of Nanophotonics and Metamaterials, ITMO University, St. Petersburg, Russia
| | - Vyacheslav Dyachuk
- Department of Nanophotonics and Metamaterials, ITMO University, St. Petersburg, Russia.,National Scientific Center of Marine Biology, Far Eastern Branch, Russian Academy of Sciences, Vladivostok, Russia
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Lien BV, Brown NJ, Ransom SC, Lehrich BM, Shahrestani S, Tafreshi AR, Ransom RC, Sahyouni R. Enhancing peripheral nerve regeneration with neurotrophic factors and bioengineered scaffolds: A basic science and clinical perspective. J Peripher Nerv Syst 2020; 25:320-334. [DOI: 10.1111/jns.12414] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Revised: 09/05/2020] [Accepted: 09/07/2020] [Indexed: 01/01/2023]
Affiliation(s)
- Brian V. Lien
- School of Medicine University of California Irvine California USA
| | - Nolan J. Brown
- School of Medicine University of California Irvine California USA
| | - Seth C. Ransom
- College of Medicine University of Arkansas for Medical Sciences Little Rock Arkansas USA
| | - Brandon M. Lehrich
- Department of Biomedical Engineering University of California Irvine California USA
| | - Shane Shahrestani
- Keck School of Medicine University of Southern California Los Angeles California USA
- Department of Medical Engineering California Institute of Technology Pasadena California USA
| | - Ali R. Tafreshi
- Department of Neurological Surgery Geisinger Health System Danville Pennsylvania USA
| | - Ryan C. Ransom
- Department of Neurological Surgery Mayo Clinic Rochester Minnesota USA
| | - Ronald Sahyouni
- Department of Neurological Surgery University of California San Diego California USA
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Stewart CE, Kan CFK, Stewart BR, Sanicola HW, Jung JP, Sulaiman OAR, Wang D. Machine intelligence for nerve conduit design and production. J Biol Eng 2020; 14:25. [PMID: 32944070 PMCID: PMC7487837 DOI: 10.1186/s13036-020-00245-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Accepted: 08/13/2020] [Indexed: 02/08/2023] Open
Abstract
Nerve guidance conduits (NGCs) have emerged from recent advances within tissue engineering as a promising alternative to autografts for peripheral nerve repair. NGCs are tubular structures with engineered biomaterials, which guide axonal regeneration from the injured proximal nerve to the distal stump. NGC design can synergistically combine multiple properties to enhance proliferation of stem and neuronal cells, improve nerve migration, attenuate inflammation and reduce scar tissue formation. The aim of most laboratories fabricating NGCs is the development of an automated process that incorporates patient-specific features and complex tissue blueprints (e.g. neurovascular conduit) that serve as the basis for more complicated muscular and skin grafts. One of the major limitations for tissue engineering is lack of guidance for generating tissue blueprints and the absence of streamlined manufacturing processes. With the rapid expansion of machine intelligence, high dimensional image analysis, and computational scaffold design, optimized tissue templates for 3D bioprinting (3DBP) are feasible. In this review, we examine the translational challenges to peripheral nerve regeneration and where machine intelligence can innovate bottlenecks in neural tissue engineering.
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Affiliation(s)
- Caleb E. Stewart
- Current Affiliation: Department of Neurosurgery, Louisiana State University Health Sciences Center, Shreveport Louisiana, USA
| | - Chin Fung Kelvin Kan
- Current Affiliation: Department of General Surgery, Brigham and Women’s Hospital, Boston, MA 02115 USA
| | - Brody R. Stewart
- Current Affiliation: Department of Surgery, Mayo Clinic College of Medicine, Rochester, MN 55905 USA
| | - Henry W. Sanicola
- Current Affiliation: Department of Neurosurgery, Louisiana State University Health Sciences Center, Shreveport Louisiana, USA
| | - Jangwook P. Jung
- Department of Biological Engineering, Louisiana State University, Baton Rouge, LA 70803 USA
| | - Olawale A. R. Sulaiman
- Ochsner Neural Injury & Regeneration Laboratory, Ochsner Clinic Foundation, New Orleans, LA 70121 USA
- Department of Neurosurgery, Ochsner Clinic Foundation, New Orleans, 70121 USA
| | - Dadong Wang
- Quantitative Imaging Research Team, Data 61, Commonwealth Scientific and Industrial Research Organization, Marsfield, NSW 2122 Australia
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Zhang J, Zhang Y, Chen L, Rao Z, Sun Y. Ulinastatin Promotes Regeneration of Peripheral Nerves After Sciatic Nerve Injury by Targeting let-7 microRNAs and Enhancing NGF Expression. DRUG DESIGN DEVELOPMENT AND THERAPY 2020; 14:2695-2705. [PMID: 32753848 PMCID: PMC7358071 DOI: 10.2147/dddt.s255158] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Accepted: 05/16/2020] [Indexed: 12/14/2022]
Abstract
Background Peripheral nerve injury is characterized as a common clinical problem. Ulinastatin (UTI) is a serine protease inhibitor with many biological activities including anti-inflammatory and antioxidant effects. Nonetheless, it is unknown whether UTI has a protective effect on peripheral nerve injury. Methods Thirty rats were divided into the sham operation group, the sciatic nerve injury group (injected with normal saline), and the UTI treatment group (80mg/kg/day for two consecutive weeks). Sciatic nerve function index (SFI) was used to assess the biological functions of the sciatic nerve, and compound muscle action potential (CMAP) was measured by electrophysiology. The expressions of let-7 miRNA members were detected by quantitative real-time polymerase chain reaction (qRT-PCR). Nerve growth factor (NGF), nerve regeneration-related proteins GAP43 and NF200, and myelin formation-related proteins MAG and PMP22 expressions were explored by Western blot. After Schwann cells were transfected with let-7 mimics, pcDNA3.1-NGF, let-7 inhibitors, NGF siRNA and their corresponding controls, 5-ethynyl-2ʹ-deoxyuridine (EdU) assay, and Transwell assays were employed to investigate the proliferation and migration of Schwann cells. H2O2 was utilized to construct oxidative injury to cells, and the contents of MDA, SOD, GSH, and CAT were determined. Results UTI treatment remarkably increased SFI of the rats and CMAP of sciatic nerve, enhanced nerve regeneration, and myelin regeneration, and raised the production of GAP43, NF200, MAG, and PMP22. Furthermore, it was found that UTI markedly reduced let-7 miRNAs’ expressions and increased NGF expression after sciatic nerve injury. The dual-luciferase reporter assay validated that let-7 miRNAs targeted NGF, and functional experiments demonstrated that low expression of let-7 miRNAs and NGF overexpression contributed to Schwann cells’ proliferation and migration. Additionally, UTI treatment repressed the oxidative stress regulated by let-7/NGF axis. Conclusion UTI modulates the let-7/NGF axis to inhibit oxidative stress, promote nerve regeneration, and facilitate function recovery after peripheral nerve injury.
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Affiliation(s)
- Jincheng Zhang
- Department of Orthopedics, Tongji Hospital, Tongji University School of Medicine, Shanghai, 200065, People's Republic of China
| | - Yingqi Zhang
- Department of Orthopedics, Tongji Hospital, Tongji University School of Medicine, Shanghai, 200065, People's Republic of China
| | - Lei Chen
- Department of Orthopedics, Tongji Hospital, Tongji University School of Medicine, Shanghai, 200065, People's Republic of China
| | - Zhitao Rao
- Department of Orthopedics, Tongji Hospital, Tongji University School of Medicine, Shanghai, 200065, People's Republic of China
| | - Yeqing Sun
- Department of Orthopedics, Tongji Hospital, Tongji University School of Medicine, Shanghai, 200065, People's Republic of China
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Godinho MJ, Staal JL, Krishnan VS, Hodgetts SI, Pollett MA, Goodman DP, Teh L, Verhaagen J, Plant GW, Harvey AR. Regeneration of adult rat sensory and motor neuron axons through chimeric peroneal nerve grafts containing donor Schwann cells engineered to express different neurotrophic factors. Exp Neurol 2020; 330:113355. [PMID: 32422148 DOI: 10.1016/j.expneurol.2020.113355] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 04/28/2020] [Accepted: 05/04/2020] [Indexed: 11/18/2022]
Abstract
Large peripheral nerve (PN) defects require bridging substrates to restore tissue continuity and permit the regrowth of sensory and motor axons. We previously showed that cell-free PN segments repopulated ex vivo with Schwann cells (SCs) transduced with lentiviral vectors (LV) to express different growth factors (BDNF, CNTF or NT-3) supported the regeneration of axons across a 1 cm peroneal nerve defect (Godinho et al., 2013). Graft morphology, the number of regrown axons, the ratio of myelinated to unmyelinated axons, and hindlimb locomotor function differed depending on the growth factor engineered into SCs. Here we extend these observations, adding more LVs (expressing GDNF or NGF) and characterising regenerating sensory and motor neurons after injection of the retrograde tracer Fluorogold (FG) into peroneal nerve distal to grafts, 10 weeks after surgery. Counts were also made in rats with intact nerves and in animals receiving autografts, acellular grafts, or grafts containing LV-GFP transduced SCs. Counts and analysis of FG positive (+) DRG neurons were made from lumbar (L5) ganglia. Graft groups contained fewer labeled sensory neurons than non-operated controls, but this decrease was only significant in the LV-GDNF group. These grafts had a complex fascicular morphology that may have resulted in axon trapping. The proportion of FG+ sensory neurons immunopositive for calcitonin-gene related peptide (CGRP) varied between groups, there being a significantly higher percentage in autografts and most neurotrophic factor groups compared to the LV-CNTF, LV-GFP and acellular groups. Furthermore, the proportion of regenerating isolectin B4+ neurons was significantly greater in the LV-NT-3 group compared to other groups, including autografts and non-lesion controls. Immunohistochemical analysis of longitudinal graft sections revealed that all grafts contained a reduced number of choline acetyltransferase (ChAT) positive axons, but this decrease was significant only in the GDNF and NT-3 graft groups. We also assessed the number and phenotype of regrowing lumbar FG+ motor neurons in non-lesioned animals, and in rats with autografts, acellular grafts, or in grafts containing SCs expressing GFP, CNTF, NGF or NT-3. The overall number of FG+ motor neurons per section was similar in all groups; however in tissue immunostained for NeuN (expressed in α- but not γ-motor neurons) the proportion of NeuN negative FG+ neurons ranged from about 40-50% in all groups except the NT-3 group, where the percentage was 82%, significantly more than the SC-GFP group. Immunostaining for the vesicular glutamate transporter VGLUT-1 revealed occasional proprioceptive terminals in 'contact' with regenerating FG+ α-motor neurons in PN grafted animals, the acellular group having the lowest counts. In sum, while all graft types supported sensory and motor axon regrowth, there appeared to be axon trapping in SC-GDNF grafts, and data from the SC-NT-3 group revealed greater regeneration of sensory CGRP+ and IB4+ neurons, preferential regeneration of γ-motor neurons and perhaps partial restoration of monosynaptic sensorimotor relays.
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Affiliation(s)
- Maria João Godinho
- School of Human Sciences, The University of Western Australia, Crawley, WA 6009, Australia
| | - Jonas L Staal
- School of Human Sciences, The University of Western Australia, Crawley, WA 6009, Australia
| | - Vidya S Krishnan
- School of Human Sciences, The University of Western Australia, Crawley, WA 6009, Australia
| | - Stuart I Hodgetts
- School of Human Sciences, The University of Western Australia, Crawley, WA 6009, Australia; Perron Institute for Neurological and Translational Science, Nedlands, WA 6009, Australia
| | - Margaret A Pollett
- School of Human Sciences, The University of Western Australia, Crawley, WA 6009, Australia
| | - Douglas P Goodman
- School of Veterinary and Biomedical Sciences, Murdoch University, Murdoch, WA 6150, Australia
| | - Lip Teh
- Plastic Surgery Centre, St John of God Hospital, Murdoch, WA 6150, Australia
| | - Joost Verhaagen
- Netherlands Institute for Neuroscience, Meibergdreef 47, Amsterdam, the Netherlands
| | - Giles W Plant
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Alan R Harvey
- School of Human Sciences, The University of Western Australia, Crawley, WA 6009, Australia; Perron Institute for Neurological and Translational Science, Nedlands, WA 6009, Australia.
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18
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Wu Z, Li Q, Xie S, Shan X, Cai Z. In vitro and in vivo biocompatibility evaluation of a 3D bioprinted gelatin-sodium alginate/rat Schwann-cell scaffold. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 109:110530. [DOI: 10.1016/j.msec.2019.110530] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 10/16/2019] [Accepted: 12/05/2019] [Indexed: 12/30/2022]
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Fadia NB, Bliley JM, DiBernardo GA, Crammond DJ, Schilling BK, Sivak WN, Spiess AM, Washington KM, Waldner M, Liao HT, James IB, Minteer DM, Tompkins-Rhoades C, Cottrill AR, Kim DY, Schweizer R, Bourne DA, Panagis GE, Asher Schusterman M, Egro FM, Campwala IK, Simpson T, Weber DJ, Gause T, Brooker JE, Josyula T, Guevara AA, Repko AJ, Mahoney CM, Marra KG. Long-gap peripheral nerve repair through sustained release of a neurotrophic factor in nonhuman primates. Sci Transl Med 2020; 12:12/527/eaav7753. [DOI: 10.1126/scitranslmed.aav7753] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Revised: 08/26/2019] [Accepted: 11/25/2019] [Indexed: 01/09/2023]
Abstract
Severe injuries to peripheral nerves are challenging to repair. Standard-of-care treatment for nerve gaps >2 to 3 centimeters is autografting; however, autografting can result in neuroma formation, loss of sensory function at the donor site, and increased operative time. To address the need for a synthetic nerve conduit to treat large nerve gaps, we investigated a biodegradable poly(caprolactone) (PCL) conduit with embedded double-walled polymeric microspheres encapsulating glial cell line–derived neurotrophic factor (GDNF) capable of providing a sustained release of GDNF for >50 days in a 5-centimeter nerve defect in a rhesus macaque model. The GDNF-eluting conduit (PCL/GDNF) was compared to a median nerve autograft and a PCL conduit containing empty microspheres (PCL/Empty). Functional testing demonstrated similar functional recovery between the PCL/GDNF-treated group (75.64 ± 10.28%) and the autograft-treated group (77.49 ± 19.28%); both groups were statistically improved compared to PCL/Empty-treated group (44.95 ± 26.94%). Nerve conduction velocity 1 year after surgery was increased in the PCL/GDNF-treated macaques (31.41 ± 15.34 meters/second) compared to autograft (25.45 ± 3.96 meters/second) and PCL/Empty (12.60 ± 3.89 meters/second) treatment. Histological analyses included assessment of Schwann cell presence, myelination of axons, nerve fiber density, and g-ratio. PCL/GDNF group exhibited a statistically greater average area occupied by individual Schwann cells at the distal nerve (11.60 ± 33.01 μm2) compared to autograft (4.62 ± 3.99 μm2) and PCL/Empty (4.52 ± 5.16 μm2) treatment groups. This study demonstrates the efficacious bridging of a long peripheral nerve gap in a nonhuman primate model using an acellular, biodegradable nerve conduit.
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Affiliation(s)
- Neil B. Fadia
- Department of Plastic Surgery, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Jacqueline M. Bliley
- Department of Plastic Surgery, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | | | - Donald J. Crammond
- Department of Neurosurgery, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | | | - Wesley N. Sivak
- Department of Plastic Surgery, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Alexander M. Spiess
- Department of Plastic Surgery, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Kia M. Washington
- Department of Plastic Surgery, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Matthias Waldner
- Department of Plastic Surgery, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Han-Tsung Liao
- Department of Plastic Surgery, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Isaac B. James
- Department of Plastic Surgery, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Danielle M. Minteer
- Department of Plastic Surgery, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | | | - Adam R. Cottrill
- Department of Neuroscience, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Deok-Yeol Kim
- Department of Plastic Surgery, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Riccardo Schweizer
- Department of Plastic Surgery, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Debra A. Bourne
- Department of Plastic Surgery, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - George E. Panagis
- Department of Biology, University of Pittsburgh, Greensburg, PA 15601, USA
| | - M. Asher Schusterman
- Department of Plastic Surgery, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Francesco M. Egro
- Department of Plastic Surgery, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | | | - Tyler Simpson
- Department of Physical Medicine and Rehabilitation, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Douglas J. Weber
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15213, USA
- Department of Physical Medicine and Rehabilitation, University of Pittsburgh, Pittsburgh, PA 15213, USA
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Trent Gause
- Department of Plastic Surgery, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Jack E. Brooker
- Department of Plastic Surgery, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Tvisha Josyula
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Astrid A. Guevara
- Department of Plastic Surgery, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Alexander J. Repko
- Department of Plastic Surgery, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | | | - Kacey G. Marra
- Department of Plastic Surgery, University of Pittsburgh, Pittsburgh, PA 15213, USA
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15213, USA
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA
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Carvalho CR, Oliveira JM, Reis RL. Modern Trends for Peripheral Nerve Repair and Regeneration: Beyond the Hollow Nerve Guidance Conduit. Front Bioeng Biotechnol 2019; 7:337. [PMID: 31824934 PMCID: PMC6882937 DOI: 10.3389/fbioe.2019.00337] [Citation(s) in RCA: 153] [Impact Index Per Article: 30.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Accepted: 10/30/2019] [Indexed: 12/13/2022] Open
Abstract
Peripheral nerve repair and regeneration remains among the greatest challenges in tissue engineering and regenerative medicine. Even though peripheral nerve injuries (PNIs) are capable of some degree of regeneration, frail recovery is seen even when the best microsurgical technique is applied. PNIs are known to be very incapacitating for the patient, due to the deprivation of motor and sensory abilities. Since there is no optimal solution for tackling this problem up to this day, the evolution in the field is constant, with innovative designs of advanced nerve guidance conduits (NGCs) being reported every day. As a basic concept, a NGC should act as a physical barrier from the external environment, concomitantly acting as physical guidance for the regenerative axons across the gap lesion. NGCs should also be able to retain the naturally released nerve growth factors secreted by the damaged nerve stumps, as well as reducing the invasion of scar tissue-forming fibroblasts to the injury site. Based on the neurobiological knowledge related to the events that succeed after a nerve injury, neuronal subsistence is subjected to the existence of an ideal environment of growth factors, hormones, cytokines, and extracellular matrix (ECM) factors. Therefore, it is known that multifunctional NGCs fabricated through combinatorial approaches are needed to improve the functional and clinical outcomes after PNIs. The present work overviews the current reports dealing with the several features that can be used to improve peripheral nerve regeneration (PNR), ranging from the simple use of hollow NGCs to tissue engineered intraluminal fillers, or to even more advanced strategies, comprising the molecular and gene therapies as well as cell-based therapies.
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Affiliation(s)
- Cristiana R. Carvalho
- 3B's Research Group, I3Bs – Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Guimarães, Portugal
- ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
- The Discoveries Centre for Regenerative and Precision Medicine, Headquarters at University of Minho, Avepark, Guimarães, Portugal
| | - Joaquim M. Oliveira
- 3B's Research Group, I3Bs – Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Guimarães, Portugal
- ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
- The Discoveries Centre for Regenerative and Precision Medicine, Headquarters at University of Minho, Avepark, Guimarães, Portugal
| | - Rui L. Reis
- 3B's Research Group, I3Bs – Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Guimarães, Portugal
- ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
- The Discoveries Centre for Regenerative and Precision Medicine, Headquarters at University of Minho, Avepark, Guimarães, Portugal
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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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22
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Zhang L, Li B, Liu B, Dong Z. Co-transplantation of Epidermal Neural Crest Stem Cells and Olfactory Ensheathing Cells Repairs Sciatic Nerve Defects in Rats. Front Cell Neurosci 2019; 13:253. [PMID: 31244611 PMCID: PMC6582070 DOI: 10.3389/fncel.2019.00253] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Accepted: 05/21/2019] [Indexed: 12/20/2022] Open
Abstract
Cell-based therapy is an alternative strategy to improve outcomes of peripheral nerve injury (PNI). Epidermal neural crest stem cell (EPI-NCSC) is obtained from autologous tissue without immunological rejection, which could expand quickly in vitro and is suitable candidate for cell-based therapy. Olfactory ensheathing cell (OEC) could secrete multiple neurotrophic factors (NTFs), which is often used to repair PNI individually. However, whether the combination of EPI-NCSC and OEC have better effects on PNI repair remains unclear. Here we use EPI-NCSC and OEC co-transplantation in a rat sciatic nerve defect model to ascertain the effects and potential mechanisms of cells co-transplantation on PNI. The effect of EPI-NCSC and OEC co-transplantation on PNI is assessed by using a combination of immunohistochemistry (IHC), electrophysiological recording and neural function test. Co-transplantation of EPI-NCSC and OEC exerts a beneficial effect upon PNI such as better organized structure, nerve function recovery, and lower motoneuron apoptosis. IHC and enzyme-linked immuno sorbent assay (ELISA) further demonstrate that cells co-transplantation may improve PNI via the expression of brain derived growth factor (BDNF) and nerve growth factor (NGF) up-regulated by EPI-NCSC and OEC synergistically. Eventually, the results from this study reveal that EPI-NCSC and OEC co-transplantation effectively repairs PNI through enhancing the level of BDNF and NGF, indicating that cells co-transplantation may serve as a fruitful avenue for PNI in clinic treatment.
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Affiliation(s)
- Lu Zhang
- Department of Pediatric Research Institute, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing Key Laboratory of Translational Medical Research in Cognitive Development and Learning and Memory Disorders, Chongqing, China
| | - Bingcang Li
- State Key Laboratory of Trauma, Burns and Combined Injury, Daping Hospital, Research Institute of Surgery, Third Military Medical University, Chongqing, China
| | - Bin Liu
- Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, School of Life Sciences, Southwest University, Chongqing, China
| | - Zhifang Dong
- Department of Pediatric Research Institute, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Chongqing Key Laboratory of Translational Medical Research in Cognitive Development and Learning and Memory Disorders, Chongqing, China
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23
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Zhao X, Qian Y, Cheng Y, Guo X, Yuan WE. One-pot construction of a twice-condensed pDNA polyplex system for peripheral nerve crush injury therapy. Biomater Sci 2018; 6:2059-2072. [PMID: 29932177 DOI: 10.1039/c8bm00356d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Non-viral vector gene delivery is generally limited by its potential toxicity problems, poor transfection abilities, serum stability, or relatively complex construction processes of modified polyplexes. Thus, we develop an efficient and stable polyplex system through convenient construction methods. Here, polyethyleneimine (PEI) 1.8 kDa and glutaraldehyde (GA) are used to construct a novel twice-condensed pDNA polyplex system using a one-pot construction method, including pH-responsive C[double bond, length as m-dash]N linkages by which different PEI molecules on one single polyplex can link with each other. In this system, smaller particle sizes, higher zeta potentials and better serum stabilities are achieved without PEGylation or other chemical modifications using lyophobic segments, but via pH-responsive linkages that ensure the escape of nucleic acids. This polyplex system is used to deliver the pDNA of vascular endothelial growth factor (VEGF) whose half-life period in vivo is only around 30 minutes. Compared with polyplexes prepared using PEI 25 kDa, cells and rats treated with twice-condensed VEGF pDNA polyplexes express significantly more VEGF or myelin basic protein (MBP), and this new polyplex system showed fewer adverse effects in vitro and in vivo. In addition, revascularization and neurogenesis are also discovered in the rat sciatic nerve crush injury model.
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Affiliation(s)
- Xiaotian Zhao
- Engineering Research Center of Cell & Therapeutic Antibody, Ministry of Education, and School of Pharmacy, Shanghai Jiao Tong University, No. 800 Dongchuan RD, Shanghai 200240, China.
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24
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Lu C, Wang Y, Yang S, Wang C, Sun X, Lu J, Yin H, Jiang W, Meng H, Rao F, Wang X, Peng J. Bioactive Self-Assembling Peptide Hydrogels Functionalized with Brain-Derived Neurotrophic Factor and Nerve Growth Factor Mimicking Peptides Synergistically Promote Peripheral Nerve Regeneration. ACS Biomater Sci Eng 2018; 4:2994-3005. [DOI: 10.1021/acsbiomaterials.8b00536] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Changfeng Lu
- Institute of Orthopedics, Chinese PLA General Hospital, Fuxing Road no. 28, Beijing 100853, PR China
- Beijing Key Lab of Regenerative Medicine in Orthopedics, Fuxing Road no. 28, Beijing 100853, PR China
- Key Lab of Musculoskeletal Trauma & War Injuries, PLA, Fuxing Road no. 28, Beijing 100853, PR China
- Co-innovation Center of Neuroregeneration, Nantong University, Nantong, Jiangsu Province 226007, PR China
| | - Yu Wang
- Institute of Orthopedics, Chinese PLA General Hospital, Fuxing Road no. 28, Beijing 100853, PR China
- Beijing Key Lab of Regenerative Medicine in Orthopedics, Fuxing Road no. 28, Beijing 100853, PR China
- Key Lab of Musculoskeletal Trauma & War Injuries, PLA, Fuxing Road no. 28, Beijing 100853, PR China
- Co-innovation Center of Neuroregeneration, Nantong University, Nantong, Jiangsu Province 226007, PR China
| | - Shuhui Yang
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Chong Wang
- Institute of Orthopedics, Chinese PLA General Hospital, Fuxing Road no. 28, Beijing 100853, PR China
- Beijing Key Lab of Regenerative Medicine in Orthopedics, Fuxing Road no. 28, Beijing 100853, PR China
- Key Lab of Musculoskeletal Trauma & War Injuries, PLA, Fuxing Road no. 28, Beijing 100853, PR China
- Co-innovation Center of Neuroregeneration, Nantong University, Nantong, Jiangsu Province 226007, PR China
| | - Xun Sun
- Institute of Orthopedics, Chinese PLA General Hospital, Fuxing Road no. 28, Beijing 100853, PR China
- Beijing Key Lab of Regenerative Medicine in Orthopedics, Fuxing Road no. 28, Beijing 100853, PR China
- Key Lab of Musculoskeletal Trauma & War Injuries, PLA, Fuxing Road no. 28, Beijing 100853, PR China
- School of Medicine, Nankai University, Weijin Road no. 94, Tianjin 300071, PR China
| | - Jiaju Lu
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Heyong Yin
- Experimental Surgery and Regenerative Medicine, Department of Surgery, Ludwig-Maximilians-University, Nussbaumstrasse 20, Munich 80336, Germany
| | - Wenli Jiang
- Institute of Orthopedics, Chinese PLA General Hospital, Fuxing Road no. 28, Beijing 100853, PR China
- Beijing Key Lab of Regenerative Medicine in Orthopedics, Fuxing Road no. 28, Beijing 100853, PR China
- Key Lab of Musculoskeletal Trauma & War Injuries, PLA, Fuxing Road no. 28, Beijing 100853, PR China
| | - Haoye Meng
- Institute of Orthopedics, Chinese PLA General Hospital, Fuxing Road no. 28, Beijing 100853, PR China
- Beijing Key Lab of Regenerative Medicine in Orthopedics, Fuxing Road no. 28, Beijing 100853, PR China
- Key Lab of Musculoskeletal Trauma & War Injuries, PLA, Fuxing Road no. 28, Beijing 100853, PR China
- Co-innovation Center of Neuroregeneration, Nantong University, Nantong, Jiangsu Province 226007, PR China
| | - Feng Rao
- Institute of Orthopedics, Chinese PLA General Hospital, Fuxing Road no. 28, Beijing 100853, PR China
- Beijing Key Lab of Regenerative Medicine in Orthopedics, Fuxing Road no. 28, Beijing 100853, PR China
- Key Lab of Musculoskeletal Trauma & War Injuries, PLA, Fuxing Road no. 28, Beijing 100853, PR China
| | - Xiumei Wang
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Jiang Peng
- Institute of Orthopedics, Chinese PLA General Hospital, Fuxing Road no. 28, Beijing 100853, PR China
- Co-innovation Center of Neuroregeneration, Nantong University, Nantong, Jiangsu Province 226007, PR China
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25
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Tian J, Yu T, Xu Y, Pu S, Lv Y, Zhang X, DU D. Swimming Training Reduces Neuroma Pain by Regulating Neurotrophins. Med Sci Sports Exerc 2018; 50:54-61. [PMID: 28846565 PMCID: PMC5757647 DOI: 10.1249/mss.0000000000001411] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Introduction Neuroma formation after peripheral nerve transection leads to severe neuropathic pain in amputees. Previous studies suggested that physical exercise could bring beneficial effect on alleviating neuropathic pain. However, the effect of exercise on neuroma pain still remained unclear. In addition, long-term exercise can affect the expression of neurotrophins (NT), such as nerve growth factor (NGF) and brain-derived neurotrophic factor (BDNF), which play key roles in nociceptor sensitization and nerve sprouting after nerve injury. Here, we investigated whether long-term swimming exercise could relieve neuroma pain by modulating NT expression. Methods We used a tibial neuroma transposition (TNT) rat model to mimic neuroma pain. After TNT surgery, rats performed swimming exercise for 5 wk. Neuroma pain and tactile sensitivities were detected using von Frey filaments. Immunofluorescence was applied to analyze neuroma formation. NGF and BDNF expressions in peripheral neuroma, dorsal root ganglion, and the spinal cord were measured using enzyme-linked immunosorbent assay and Western blotting. Results TNT led to neuroma formation, induced neuroma pain, and mechanical allodynia in hind paw. Five-week swimming exercise inhibited neuroma formation and relieved mechanical allodynia in the hind paw and neuroma pain in the lateral ankle. The analgesic effect lasted for at least 1 wk, even when the exercise ceased. TNT elevated the expressions of BDNF and NGF in peripheral neuroma, dorsal root ganglion, and the spinal cord to different extents. Swimming also decreased the elevation of NT expression. Conclusions Swimming exercise not only inhibits neuroma formation induced by nerve transection but also relieves pain behavior. These effects might be associated with the modulation of NT.
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Affiliation(s)
- Jinge Tian
- 1Pain Management Center, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, CHINA; 2Department of Anesthesiology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, CHINA; and 3Center for Translational Pain Medicine, Department of Anesthesiology, Duke University School of Medicine, Durham, NC
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26
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Wood RL, Karlinsey KS, Thompson AD, Rigby MN, Boatright GD, Pitt WG, Roeder BL, Steffensen SC, Cook AD. Baseline effects of lysophosphatidylcholine and nerve growth factor in a rat model of sciatic nerve regeneration after crush injury. Neural Regen Res 2018; 13:846-853. [PMID: 29863015 PMCID: PMC5998639 DOI: 10.4103/1673-5374.232479] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Schwann cells play a major role in helping heal injured nerves. They help clear debris, produce neurotrophins, upregulate neurotrophin receptors, and form bands of Büngner to guide the healing nerve. But nerves do not always produce enough neurotrophins and neurotrophin receptors to repair themselves. Nerve growth factor (NGF) is an important neurotrophin for promoting nerve healing and lysophosphatidylcholine (LPC) has been shown to stimulate NGF receptors (NGFR). This study tested the administration of a single intraneural injection of LPC (1 mg/mL for single LPC injection and 10 mg/mL for multiple LPC injections) at day 0 and one (day 7), two (days 5 and 7), or three (days 5, 7, and 9) injections of NGF (160 ng/mL for single injections and 80 ng/mL for multiple injections) to determine baseline effects on crushed sciatic nerves in rats. The rats were randomly divided into four groups: control, crush, crush-NGF, and crush-LPC-NGF. The healing of the nerves was measured weekly by monitoring gait; electrophysiological parameters: compound muscle action potential (CMAP) amplitudes; and morphological parameters: total fascicle areas, myelinated fiber counts, fiber densities, fiber packing, and mean g-ratio values at weeks 3 and 6. The crush, crush-NGF, and crush-LPC-NGF groups statistically differed from the control group for all six weeks for the electrophysiological parameters but only differed from the control group at week 3 for the morphological parameters. The crush, crush-NGF, and crush-LPC-NGF groups did not differ from each other over the course of the study. Single injections of LPC and NGF one week apart or multiple treatments of NGF at 5, 7 and 9 days post-injury did not alter the healing rate of the sciatic nerves during weeks 1-6 of the study. These findings are important to define the baseline effects of NGF and LPC injections, as part of a larger effort to determine the minimal dose regimen of NGF to regenerate peripheral nerves.
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Affiliation(s)
- Ryan L Wood
- Department of Chemical Engineering, Brigham Young University, Provo, UT, USA
| | | | | | - Mark N Rigby
- Neuroscience Center, Brigham Young University, Provo, UT, USA
| | | | - William G Pitt
- Department of Chemical Engineering, Brigham Young University, Provo, UT, USA
| | | | - Scott C Steffensen
- Neuroscience Center; Department of Psychology, Brigham Young University, Provo, UT, USA
| | - Alonzo D Cook
- Department of Chemical Engineering; Neuroscience Center, Brigham Young University, Provo, UT, USA
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27
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Li R, Wu Y, Zou S, Wang X, Li Y, Xu K, Gong F, Liu Y, Wang J, Liao Y, Li X, Xiao J. NGF Attenuates High Glucose-Induced ER Stress, Preventing Schwann Cell Apoptosis by Activating the PI3K/Akt/GSK3β and ERK1/2 Pathways. Neurochem Res 2017; 42:3005-3018. [PMID: 28762104 DOI: 10.1007/s11064-017-2333-6] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Revised: 05/22/2017] [Accepted: 06/14/2017] [Indexed: 01/24/2023]
Abstract
Diabetic peripheral neuropathy (DPN) is one of the most common and troublesome complications of diabetes mellitus. It has been demonstrated that nerve growth factor (NGF) exerts a pivotal role in the regulation of neuronal growth and the promotion of DPN recovery. However, the exact molecular mechanisms are not well understood. Recent studies have indicated that as a novel therapeutic target, endoplasmic reticulum (ER) stress participates in the onset and progression of DPN. In the present study, it has been demonstrated that NGF prevents the sciatic nerve from degeneration and demyelination in DPN rats. Thus, RSC 96 cells, which retain the characteristic features of Schwann cells (SCs), were cultured in medium containing 30 mM glucose (high glucose, HG) to mimic SCs in DPN mice. The 50-ng/ml dose of NGF was identified to be the optimal concentration for treating an excessive ER stress level under HG conditions for 24 h. We found that NGF treatment significantly inhibits HG-induced ER stress and subsequently suppresses ER-related apoptosis. Further, NGF administration also activates the upstream signaling pathway of ER stress, PI3K/Akt/GSK3β signaling and ERK1/2 signaling. Co-treatment with the PI3K inhibitor LY294002 or ERK1/2 inhibitor U0126 significantly reverses the protective role of NGF on HG-induced excessive ER stress and subsequent apoptosis. These observations suggest that the neuroprotective role of NGF in DPN is mediated by the inhibition of excessive ER stress via the activation of the PI3K/Akt/GSK3β and ERK1/2 signaling pathways.
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Affiliation(s)
- Rui Li
- Molecular Pharmacology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, 325035, Zhejiang, China
| | - Yanqing Wu
- The Institute of Life Sciences, Wenzhou University, Wenzhou, 325035, China
| | - Shuang Zou
- Molecular Pharmacology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, 325035, Zhejiang, China
| | - Xiaofang Wang
- Molecular Pharmacology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, 325035, Zhejiang, China
| | - Yiyang Li
- Molecular Pharmacology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, 325035, Zhejiang, China
| | - Ke Xu
- The Institute of Life Sciences, Wenzhou University, Wenzhou, 325035, China
| | - Fanghua Gong
- Molecular Pharmacology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, 325035, Zhejiang, China
| | - Yanlong Liu
- Molecular Pharmacology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, 325035, Zhejiang, China
| | - Jian Wang
- Department of Peripheral Neurosurgery, The First Affiliated Hospital, Wenzhou Medical University, Wenzhou, 325000, Zhejiang, China
| | - Yi Liao
- Department of Surgery, The Second Affiliated Hospital, Wenzhou Medical University, Wenzhou, 325000, Zhejiang, China
| | - Xiaokun Li
- Molecular Pharmacology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, 325035, Zhejiang, China. .,The Institute of Life Sciences, Wenzhou University, Wenzhou, 325035, China.
| | - Jian Xiao
- Molecular Pharmacology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, 325035, Zhejiang, China. .,The Institute of Life Sciences, Wenzhou University, Wenzhou, 325035, China.
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28
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Li G, Xiao Q, Zhang L, Zhao Y, Yang Y. Nerve growth factor loaded heparin/chitosan scaffolds for accelerating peripheral nerve regeneration. Carbohydr Polym 2017; 171:39-49. [PMID: 28578969 DOI: 10.1016/j.carbpol.2017.05.006] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2017] [Revised: 04/17/2017] [Accepted: 05/01/2017] [Indexed: 11/16/2022]
Abstract
Artificial chitosan scaffolds have been widely investigated for peripheral nerve regeneration. However, the effect was not as good as that of autologous grafts and therefore could not meet the clinical requirement. In the present study, the nerve growth factor (NGF) loaded heparin/chitosan scaffolds were fabricated via electrostatic interaction for further improving nerve regeneration. The physicochemical properties including morphology, wettability and composition were measured. The heparin immobilization, NGF loading and release were quantitatively and qualitatively characterized, respectively. The effect of NGF loaded heparin/chitosan scaffolds on nerve regeneration was evaluated by Schwann cells culture for different periods. The results showed that the heparin immobilization and NGF loading did not cause the change of bulk properties of chitosan scaffolds except for morphology and wettability. The pre-immobilization of heparin in chitosan scaffolds could enhance the stability of subsequently loaded NGF. The NGF loaded heparin/chitosan scaffolds could obviously improve the attachment and proliferation of Schwann cells in vitro. More importantly, the NGF loaded heparin/chitosan scaffolds could effectively promote the morphology development of Schwann cells. The study may provide a useful experimental basis to design and develop artificial implants for peripheral nerve regeneration and other tissue regeneration.
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Affiliation(s)
- Guicai Li
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Nantong University, 226001, Nantong, PR China; The Neural Regeneration Co-Innovation Center of Jiangsu Province, 226001 Nantong, PR China.
| | - Qinzhi Xiao
- Department of Pediatrics, Affiliated Hospital of Nantong University, 226001, Nantong, PR China
| | - Luzhong Zhang
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Nantong University, 226001, Nantong, PR China; The Neural Regeneration Co-Innovation Center of Jiangsu Province, 226001 Nantong, PR China
| | - Yahong Zhao
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Nantong University, 226001, Nantong, PR China; The Neural Regeneration Co-Innovation Center of Jiangsu Province, 226001 Nantong, PR China
| | - Yumin Yang
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Nantong University, 226001, Nantong, PR China; The Neural Regeneration Co-Innovation Center of Jiangsu Province, 226001 Nantong, PR China.
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Busuttil F, Rahim AA, Phillips JB. Combining Gene and Stem Cell Therapy for Peripheral Nerve Tissue Engineering. Stem Cells Dev 2017; 26:231-238. [PMID: 27960587 DOI: 10.1089/scd.2016.0188] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Despite a substantially increased understanding of neuropathophysiology, insufficient functional recovery after peripheral nerve injury remains a significant clinical challenge. Nerve regeneration following injury is dependent on Schwann cells, the supporting cells in the peripheral nervous system. Following nerve injury, Schwann cells adopt a proregenerative phenotype, which supports and guides regenerating nerves. However, this phenotype may not persist long enough to ensure functional recovery. Tissue-engineered nerve repair devices containing therapeutic cells that maintain the appropriate phenotype may help enhance nerve regeneration. The combination of gene and cell therapy is an emerging experimental strategy that seeks to provide the optimal environment for axonal regeneration and reestablishment of functional circuits. This review aims to summarize current preclinical evidence with potential for future translation from bench to bedside.
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Affiliation(s)
- Francesca Busuttil
- 1 Department of Pharmacology, UCL School of Pharmacy, University College London , London, United Kingdom
| | - Ahad A Rahim
- 1 Department of Pharmacology, UCL School of Pharmacy, University College London , London, United Kingdom
| | - James B Phillips
- 2 Department of Biomaterials and Tissue Engineering, UCL Eastman Dental Institute, University College London , London, United Kingdom
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Wang Y, Li WY, Jia H, Zhai FG, Qu WR, Cheng YX, Liu YC, Deng LX, Guo SF, Jin ZS. KLF7-transfected Schwann cell graft transplantation promotes sciatic nerve regeneration. Neuroscience 2016; 340:319-332. [PMID: 27826105 DOI: 10.1016/j.neuroscience.2016.10.069] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Revised: 10/24/2016] [Accepted: 10/29/2016] [Indexed: 11/16/2022]
Abstract
Our former study demonstrated that Krüppel-like Factor 7 (KLF7) is a transcription factor that stimulates axonal regeneration after peripheral nerve injury. Currently, we used a gene therapy approach to overexpress KLF7 in Schwann cells (SCs) and assessed whether KLF7-transfected SCs graft could promote sciatic nerve regeneration. SCs were transfected by adeno-associated virus 2 (AAV2)-KLF7 in vitro. Mice were allografted by an acellular nerve (ANA) with either an injection of DMEM (ANA group), SCs (ANA+SCs group) or AAV2-KLF7-transfected SCs (ANA+KLF7-SCs group) to assess repair of a sciatic nerve gap. The results indicate that KLF7 overexpression promoted the proliferation of both transfected SCs and native SCs. The neurite length of the dorsal root ganglia (DRG) explants was enhanced. Several beneficial effects were detected in the ANA+KLF7-SCs group including an increase in the compound action potential amplitude, sciatic function index score, enhanced expression of PKH26-labeling transplant SCs, peripheral myelin protein 0, neurofilaments, S-100, and myelinated regeneration nerve. Additionally, HRP-labeled motoneurons in the spinal cord, CTB-labeled sensory neurons in the DRG, motor endplate density and the weight ratios of target muscles were increased by the treatment while thermal hyperalgesia was diminished. Finally, expression of KLF7, NGF, GAP43, TrkA and TrkB were enhanced in the grafted SCs, which may indicate that several signal pathways may be involved in conferring the beneficial effects from KLF7 overexpression. We concluded that KLF7-overexpressing SCs promoted axonal regeneration of the peripheral nerve and enhanced myelination, which collectively proved KLF-SCs as a novel therapeutic strategy for injured nerves.
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Affiliation(s)
- Ying Wang
- Department of Anatomy, Mudanjiang College of Medicine, Mudanjiang 157011, China
| | - Wen-Yuan Li
- Department of Anatomy, Mudanjiang College of Medicine, Mudanjiang 157011, China.
| | - Hua Jia
- Department of Anatomy, Ningxia Medical University, Yinchuan 750004, China
| | - Feng-Guo Zhai
- Department of Pharmacology, Mudanjiang College of Medicine, Mudanjiang 157011, China
| | - Wen-Rui Qu
- Hand & Foot Surgery and Reparative & Reconstructive Surgery Center, Orthopaedic Hospital of the Second Hospital of Jilin University, Changchun 130041, China
| | - Yong-Xia Cheng
- Department of Pathology, Mudanjiang College of Medicine, Mudanjiang 157011, China
| | - Yan-Cui Liu
- Department of Anatomy, Mudanjiang College of Medicine, Mudanjiang 157011, China
| | - Ling-Xiao Deng
- Spinal Cord and Brain Injury Research Group, Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, IN 46202, United States
| | - Su-Fen Guo
- Hand & Foot Surgery and Reparative & Reconstructive Surgery Center, Orthopaedic Hospital of the Second Hospital of Jilin University, Changchun 130041, China
| | - Zai-Shun Jin
- Hand & Foot Surgery and Reparative & Reconstructive Surgery Center, Orthopaedic Hospital of the Second Hospital of Jilin University, Changchun 130041, China
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31
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Regulable Transgene Expression in Dorsal Root Ganglia of a Replication-Defective Herpes Simplex Virus Type 1 Vector by Means of Sciatic Nerve Injection. Plast Reconstr Surg 2016; 137:331e-338e. [PMID: 26818323 DOI: 10.1097/01.prs.0000475777.22020.ff] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Targeted and controllable gene delivery to neurons is essential to efforts to facilitate peripheral nerve regeneration. The authors investigated both the in vitro and in vivo expression profiles of a tetracycline-controlled, replication-defective, herpes simplex virus type 1-based vector. METHODS Mouse primary dorsal root ganglia cells were infected with QR9TO-LacZ in the absence or presence of tetracycline. LacZ gene expression was examined. It was also injected into sciatic nerves in CD-1 mice fed with and without tetracycline. LacZ expression in the upstream dorsal root ganglia was examined. RESULTS Following inoculation with QR9TO-LacZ, approximately 40 percent of the cultured primary dorsal root ganglia cells exhibited strong LacZ activity in the presence of tetracycline at 48 and 72 hours, whereas little was detected in those in the absence of tetracycline. Quantitative analysis revealed that the β-galactosidase activity within cells exposed to tetracycline increased 181-fold at 48 hours (p < 0.001) and 47-fold at 72 hours after infection (p < 0.05) compared with those without tetracycline. However, this LacZ transgene activity in the presence of tetracycline tapered off to less than sevenfold over baseline 168 hours after infection (p < 0.05). Furthermore, successful uptake of this replication-defective viral vector was evident in upstream dorsal root ganglia after sciatic nerve injection in mice. In addition, its expression profile was similar to that in vitro, as strong β-galactosidase activity was evident only in mice fed with a doxycycline-containing diet, and it tapered off by 168 hours. CONCLUSION The replication-defective herpes simplex virus type 1-based vector, which provides tightly regulated transgene expression in dorsal root ganglia by means of peripheral nerve injection, represents an appealing approach to improve peripheral nerve regeneration.
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Krishnan VS, White Z, McMahon CD, Hodgetts SI, Fitzgerald M, Shavlakadze T, Harvey AR, Grounds MD. A Neurogenic Perspective of Sarcopenia: Time Course Study of Sciatic Nerves From Aging Mice. J Neuropathol Exp Neurol 2016; 75:464-78. [DOI: 10.1093/jnen/nlw019] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
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Li HF, Wang YR, Huo HP, Wang YX, Tang J. Neuroprotective effects of ultrasound-guided nerve growth factor injections after sciatic nerve injury. Neural Regen Res 2016; 10:1846-55. [PMID: 26807123 PMCID: PMC4705800 DOI: 10.4103/1673-5374.170315] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Nerve growth factor (NGF) plays an important role in promoting neuroregeneration after peripheral nerve injury. However, its effects are limited by its short half-life; it is therefore important to identify an effective mode of administration. High-frequency ultrasound (HFU) is increasingly used in the clinic for high-resolution visualization of tissues, and has been proposed as a method for identifying and evaluating peripheral nerve damage after injury. In addition, HFU is widely used for guiding needle placement when administering drugs to a specific site. We hypothesized that HFU guiding would optimize the neuroprotective effects of NGF on sciatic nerve injury in the rabbit. We performed behavioral, ultrasound, electrophysiological, histological, and immunohistochemical evaluation of HFU-guided NGF injections administered immediately after injury, or 14 days later, and compared this mode of administration with intramuscular NGF injections. Across all assessments, HFU-guided NGF injections gave consistently better outcomes than intramuscular NGF injections administered immediately or 14 days after injury, with immediate treatment also yielding better structural and functional results than when the treatment was delayed by 14 days. Our findings indicate that NGF should be administered as early as possible after peripheral nerve injury, and highlight the striking neuroprotective effects of HFU-guided NGF injections on peripheral nerve injury compared with intramuscular administration.
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Affiliation(s)
- Hong-Fei Li
- Department of Ultrasound, Chinese PLA General Hospital, Beijing, China
| | - Yi-Ru Wang
- Department of Ultrasound, Chinese PLA General Hospital, Beijing, China
| | - Hui-Ping Huo
- Department of Ultrasound, Chinese PLA General Hospital, Beijing, China
| | - Yue-Xiang Wang
- Department of Ultrasound, Chinese PLA General Hospital, Beijing, China
| | - Jie Tang
- Department of Ultrasound, Chinese PLA General Hospital, Beijing, China
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Huang L, Quan X, Liu Z, Ma T, Wu Y, Ge J, Zhu S, Yang Y, Liu L, Sun Z, Huang J, Luo Z. c-Jun gene-modified Schwann cells: upregulating multiple neurotrophic factors and promoting neurite outgrowth. Tissue Eng Part A 2016; 21:1409-21. [PMID: 25588149 DOI: 10.1089/ten.tea.2014.0416] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Genetically modified Schwann cells (SCs) that overexpress neurotrophic factors (NFs), especially those that overexpress multiple NFs, hold great potential for promoting nerve regeneration. Currently, only one NF can be upregulated in most genetically modified SCs, and simultaneously upregulating multiple NFs in SCs remains challenging. In this study, we found that the overexpression of c-Jun, a component of the AP-1 transcription factor, effectively upregulated the expression and secretion of multiple NFs, including glial cell line-derived neurotrophic factor, brain-derived neurotrophic factor, artemin, leukemia inhibitory factor, and nerve growth factor. The c-Jun gene-modified SCs showed a normal morphology in scanning electron microscopy and fluorescent staining analysis. In addition, the c-Jun-modified SCs showed enhanced proliferation and migration abilities compared with vector control cells. We used transwell chambers to establish coculture systems imitating the in vivo conditions in which transplanted SCs might influence native SCs and neurons. We found that the c-Jun-modified SCs enhanced native SC migration and promoted the proliferation of native SCs in the presence of axons. Further analysis revealed that in the c-Jun group, the average length and the total area of neurites divided by the total area of the explant body were μm 1180±25 and 6.4±0.4, respectively, which were significantly greater compared with the other groups. These findings raise the possibility of constructing an optimal therapeutic alternative for nerve repair using c-Jun-modified SCs, which have the potential to promote axonal regeneration and functional recovery by upregulating multiple NFs. In addition, these cells exhibit enhanced migration and proliferation abilities, enhance the biological functions of native SCs, and promote neurite outgrowth.
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Affiliation(s)
- Liangliang Huang
- 1 Department of Orthopedics, Xijing Hospital, The Fourth Military Medical University , Xi'an, Shaanxi, China
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Sweet L, Kang Y, Czisch C, Witek L, Shi Y, Smay J, Plant GW, Yang Y. Geometrical versus Random β-TCP Scaffolds: Exploring the Effects on Schwann Cell Growth and Behavior. PLoS One 2015; 10:e0139820. [PMID: 26444999 PMCID: PMC4596809 DOI: 10.1371/journal.pone.0139820] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2014] [Accepted: 09/17/2015] [Indexed: 12/22/2022] Open
Abstract
Numerous studies have demonstrated that Schwann cells (SCs) play a role in nerve regeneration; however, their role in innervating a bioceramic scaffold for potential application in bone regeneration is still unknown. Here we report the cell growth and functional behavior of SCs on β-tricalcium phosphate (β-TCP) scaffolds arranged in 3D printed-lattice (P-β-TCP) and randomly-porous, template-casted (N-β-TCP) structures. Our results indicate that SCs proliferated well and expressed the phenotypic markers p75LNGFR and the S100-β subunit of SCs as well as displayed growth morphology on both scaffolds, but SCs showed spindle-shaped morphology with a significant degree of SCs alignment on the P-β-TCP scaffolds, seen to a lesser degree in the N-β-TCP scaffold. The gene expressions of nerve growth factor (β-ngf), neutrophin–3 (nt–3), platelet-derived growth factor (pdgf-bb), and vascular endothelial growth factor (vegf-a) were higher at day 7 than at day 14. While no significant differences in protein secretion were measured between these last two time points, the scaffolds promoted the protein secretion at day 3 compared to that on the cell culture plates. These results together imply that the β-TCP scaffolds can support SC cell growth and that the 3D-printed scaffold appeared to significantly promote the alignment of SCs along the struts. Further studies are needed to investigate the early and late stage relationship between gene expression and protein secretion of SCs on the scaffolds with refined characteristics, thus better exploring the potential of SCs to support vascularization and innervation in synthetic bone grafts.
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Affiliation(s)
- Lauren Sweet
- Department of Orthopaedic Surgery, Stanford University, Stanford, California, United States of America
- Department of Biology, Stanford University, Stanford, California, United States of America
| | - Yunqing Kang
- Department of Orthopaedic Surgery, Stanford University, Stanford, California, United States of America
- Department of Ocean and Mechanical Engineering, Florida Atlantic University, Boca Raton, Florida, United States of America
| | - Christopher Czisch
- Department of Neurosurgery, Stanford University, Stanford, California, United States of America
| | - Lukasz Witek
- School of Chemical Engineering, Oklahoma State University, Stillwater, Oklahoma, United States of America
| | - Yang Shi
- School of Chemical Engineering, Oklahoma State University, Stillwater, Oklahoma, United States of America
| | - Jim Smay
- School of Chemical Engineering, Oklahoma State University, Stillwater, Oklahoma, United States of America
| | - Giles W. Plant
- Department of Neurosurgery, Stanford University, Stanford, California, United States of America
| | - Yunzhi Yang
- Department of Orthopaedic Surgery, Stanford University, Stanford, California, United States of America
- Department of Materials Science and Engineering, Stanford University, Stanford, California, United States of America
- Department of Bioengineering, Stanford University, Stanford, California, United States of America
- * E-mail:
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Hoyng SA, de Winter F, Tannemaat MR, Blits B, Malessy MJA, Verhaagen J. Gene therapy and peripheral nerve repair: a perspective. Front Mol Neurosci 2015; 8:32. [PMID: 26236188 PMCID: PMC4502351 DOI: 10.3389/fnmol.2015.00032] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Accepted: 07/01/2015] [Indexed: 12/19/2022] Open
Abstract
Clinical phase I/II studies have demonstrated the safety of gene therapy for a variety of central nervous system disorders, including Canavan's, Parkinson's (PD) and Alzheimer's disease (AD), retinal diseases and pain. The majority of gene therapy studies in the CNS have used adeno-associated viral vectors (AAV) and the first AAV-based therapeutic, a vector encoding lipoprotein lipase, is now marketed in Europe under the name Glybera. These remarkable advances may become relevant to translational research on gene therapy to promote peripheral nervous system (PNS) repair. This short review first summarizes the results of gene therapy in animal models for peripheral nerve repair. Secondly, we identify key areas of future research in the domain of PNS-gene therapy. Finally, a perspective is provided on the path to clinical translation of PNS-gene therapy for traumatic nerve injuries. In the latter section we discuss the route and mode of delivery of the vector to human patients, the efficacy and safety of the vector, and the choice of the patient population for a first possible proof-of-concept clinical study.
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Affiliation(s)
- Stefan A Hoyng
- Department of Neuroregeneration, Netherlands Institute for Neuroscience Amsterdam, Netherlands ; Department of Neurosurgery, Leiden University Medical Center Leiden, Netherlands
| | - Fred de Winter
- Department of Neuroregeneration, Netherlands Institute for Neuroscience Amsterdam, Netherlands ; Department of Neurosurgery, Leiden University Medical Center Leiden, Netherlands
| | - Martijn R Tannemaat
- Department of Neuroregeneration, Netherlands Institute for Neuroscience Amsterdam, Netherlands ; Department of Neurology, Leiden University Medical Center Leiden, Netherlands
| | | | - Martijn J A Malessy
- Department of Neuroregeneration, Netherlands Institute for Neuroscience Amsterdam, Netherlands ; Department of Neurosurgery, Leiden University Medical Center Leiden, Netherlands
| | - Joost Verhaagen
- Department of Neuroregeneration, Netherlands Institute for Neuroscience Amsterdam, Netherlands ; Center for Neurogenomics and Cognition Research, Neuroscience Campus Amsterdam Amsterdam, Netherlands
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Hoyng SA, De Winter F, Gnavi S, van Egmond L, Attwell CL, Tannemaat MR, Verhaagen J, Malessy MJA. Gene delivery to rat and human Schwann cells and nerve segments: a comparison of AAV 1–9 and lentiviral vectors. Gene Ther 2015; 22:767-80. [DOI: 10.1038/gt.2015.47] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2014] [Revised: 03/29/2015] [Accepted: 04/27/2015] [Indexed: 12/17/2022]
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Grochmal J, Midha R. Recent advances in stem cell-mediated peripheral nerve repair. Cells Tissues Organs 2015; 200:13-22. [PMID: 25825283 DOI: 10.1159/000369450] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/28/2014] [Indexed: 11/19/2022] Open
Abstract
A major advance in the field of peripheral nerve repair has been the advent of stem and progenitor cell use to supplement the regenerative environment in animal models of nerve injury. As Schwann cell replacements, stem cells may be even better suited to promoting regeneration in these scenarios. We review the recent literature detailing the search for the definitive Schwann cell replacement cell, including a look at genetic modification of transplanted cells for nerve injury repair.
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Silk-tropoelastin protein films for nerve guidance. Acta Biomater 2015; 14:1-10. [PMID: 25481743 DOI: 10.1016/j.actbio.2014.11.045] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2014] [Revised: 11/16/2014] [Accepted: 11/24/2014] [Indexed: 12/24/2022]
Abstract
Peripheral nerve regeneration may be enhanced through the use of biodegradable thin film biomaterials as highly tuned inner nerve conduit liners. Dorsal root ganglion neuron and Schwann cell responses were studied on protein films comprising silk fibroin blended with recombinant human tropoelastin protein. Tropoelastin significantly improved neurite extension and enhanced Schwann cell process length and cell area, while the silk provided a robust biomaterial template. Silk-tropoelastin blends afforded a 2.4-fold increase in neurite extension, when compared to silk films coated with poly-d-lysine. When patterned by drying on grooved polydimethylsiloxane (3.5 μm groove width, 0.5 μm groove depth), these protein blends induced both neurite and Schwann cell process alignment. Neurons were functional as assessed using patch-clamping, and displayed action potentials similar to those cultured on poly(lysine)-coated glass. Taken together, silk-tropoelastin films offer useful biomaterial interfacial platforms for nerve cell control, which can be considered for neurite guidance, disease models for neuropathies and surgical peripheral nerve repairs.
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Lee JH, Kim SG. Effects of extracorporeal shock wave therapy on functional recovery and neurotrophin-3 expression in the spinal cord after crushed sciatic nerve injury in rats. ULTRASOUND IN MEDICINE & BIOLOGY 2015; 41:790-796. [PMID: 25619787 DOI: 10.1016/j.ultrasmedbio.2014.10.015] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Revised: 10/22/2014] [Accepted: 10/24/2014] [Indexed: 06/04/2023]
Abstract
The study described here investigated the effects of extracorporeal shock wave therapy (ESWT) on functional recovery and neurotrophin-3 expression in the spinal cord after sciatic nerve injury in rats. Forty-five 8-wk-old rats were used and randomly divided into three groups: An experimental group, a control group and a sham group. The experimental group received ESWT after the nerve-crushing damage. The sciatic functional index and Dartfish Software were used to determine the effect of sciatic nerve damage on functional changes. A 1-cm length of spinal cord encompassing the L4-6 level was removed for Western blot analysis. The sciatic functional index significantly changed in both the ESWT and control groups after impairment. In the time course evaluation of the ankle angle in the toe off, the ESWT group had statistically significant increases from day 21 onward. There was a significant difference in neurotrophin-3 expression between the groups on days 1, 7 and 14 after impairment. Early application of ESWT increased the expression of neurotrophin-3 and neurotrophin-3 mRNA, and daily therapy facilitated the activity of macrophages and Schwann cells, which affect the survival and regeneration of neurons.
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Affiliation(s)
- Jung-Ho Lee
- Department of Physical Therapy, School of Medical & Public Health, Kyungdong University, Gangwon-do, Republic of Korea
| | - Seong-Gil Kim
- Department of Rehabilitation Science, Daegu University, Gyeongbuk, Republic of Korea.
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Stem cell-based approaches to improve nerve regeneration: potential implications for reconstructive transplantation? Arch Immunol Ther Exp (Warsz) 2014; 63:15-30. [PMID: 25428664 DOI: 10.1007/s00005-014-0323-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Accepted: 10/07/2014] [Indexed: 12/17/2022]
Abstract
Reconstructive transplantation has become a viable option to restore form and function after devastating tissue loss. Functional recovery is a key determinant of overall success and critically depends on the quality and pace of nerve regeneration. Several molecular and cell-based therapies have been postulated and tested in pre-clinical animal models to enhance nerve regeneration. Schwann cells remain the mainstay of research focus providing neurotrophic support and signaling cues for regenerating axons. Alternative cell sources such as mesenchymal stem cells and adipose-derived stromal cells have also been tested in pre-clinical animal models and in clinical trials due to their relative ease of harvest, rapid expansion in vitro, minimal immunogenicity, and capacity to integrate and survive within host tissues, thereby overcoming many of the challenges faced by culturing of human Schwann cells and nerve allografting. Induced pluripotent stem cell-derived Schwann cells are of particular interest since they can provide abundant, patient-specific autologous Schwann cells. The majority of experimental evidence on cell-based therapies, however, has been generated using stem cell-seeded nerve guides that were developed to enhance nerve regeneration across "gaps" in neural repair. Although primary end-to-end repair is the preferred method of neurorrhaphy in reconstructive transplantation, mechanistic studies elucidating the principles of cell-based therapies from nerve guidance conduits will form the foundation of further research employing stem cells in end-to-end repair of donor and recipient nerves. This review presents key components of nerve regeneration in reconstructive transplantation and highlights the pre-clinical studies that utilize stem cells to enhance nerve regeneration.
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Hoyng SA, De Winter F, Gnavi S, de Boer R, Boon LI, Korvers LM, Tannemaat MR, Malessy MJ, Verhaagen J. A comparative morphological, electrophysiological and functional analysis of axon regeneration through peripheral nerve autografts genetically modified to overexpress BDNF, CNTF, GDNF, NGF, NT3 or VEGF. Exp Neurol 2014; 261:578-93. [DOI: 10.1016/j.expneurol.2014.08.002] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Accepted: 08/05/2014] [Indexed: 01/21/2023]
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Ma S, Peng C, Wu S, Wu D, Gao C. Sciatic nerve regeneration using a nerve growth factor-containing fibrin glue membrane. Neural Regen Res 2014; 8:3416-22. [PMID: 25206664 PMCID: PMC4146009 DOI: 10.3969/j.issn.1673-5374.2013.36.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2013] [Accepted: 11/02/2013] [Indexed: 01/23/2023] Open
Abstract
Our previous findings confirmed that the nerve growth factor-containing fibrin glue membrane provides a good microenvironment for peripheral nerve regeneration; however, the precise mechanism remains unclear. p75 neurotrophin receptor (p75(NTR)) plays an important role in the regulation of peripheral nerve regeneration. We hypothesized that a nerve growth factor-containing fibrin glue membrane can promote neural regeneration by up-regulating p75(NTR) expression. In this study, we used a silicon nerve conduit to bridge a 15 mm-long sciatic nerve defect and injected a mixture of nerve growth factor and fibrin glue at the anastomotic site of the nerve conduit and the sciatic nerve. Through RT-PCR and western blot analysis, nerve growth factor-containing fibrin glue membrane significantly increased p75(NTR) mRNA and protein expression in the Schwann cells at the anastomotic site, in particular at 8 weeks after injection of the nerve growth factor/fibrin glue mixture. These results indicate that nerve growth factor-containing fibrin glue membrane can promote peripheral nerve regeneration by up-regulating p75(NTR) expression in Schwann cells.
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Affiliation(s)
- Shengzhong Ma
- Department of Orthopedics, Second Affiliated Hospital of Shandong University, Jinan 250033, Shandong Province, China
| | - Changliang Peng
- Department of Orthopedics, Second Affiliated Hospital of Shandong University, Jinan 250033, Shandong Province, China
| | - Shiqing Wu
- Department of Orthopedics, Second Affiliated Hospital of Shandong University, Jinan 250033, Shandong Province, China
| | - Dongjin Wu
- Department of Orthopedics, Second Affiliated Hospital of Shandong University, Jinan 250033, Shandong Province, China
| | - Chunzheng Gao
- Department of Orthopedics, Second Affiliated Hospital of Shandong University, Jinan 250033, Shandong Province, China
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Zhao F, He W, Zhang Y, Tian D, Zhao H, Yu K, Bai J. Electric stimulation and decimeter wave therapy improve the recovery of injured sciatic nerves. Neural Regen Res 2014; 8:1974-84. [PMID: 25206506 PMCID: PMC4145900 DOI: 10.3969/j.issn.1673-5374.2013.21.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Accepted: 06/24/2013] [Indexed: 01/08/2023] Open
Abstract
Drug treatment, electric stimulation and decimeter wave therapy have been shown to promote the repair and regeneration of the peripheral nerves at the injured site. This study prepared a Mackinnon's model of rat sciatic nerve compression. Electric stimulation was given immediately after neurolysis, and decimeter wave radiation was performed at 1 and 12 weeks post-operation. Histological observation revealed that intraoperative electric stimulation and decimeter wave therapy could improve the local blood circulation of repaired sites, alleviate hypoxia of compressed nerves, and lessen adhesion of compressed nerves, thereby decreasing the formation of new entrapments and enhancing compressed nerve regeneration through an improved microenvironment for regeneration. Immunohistochemical staining results revealed that intraoperative electric stimulation and decimeter wave could promote the expression of S-100 protein. Motor nerve conduction velocity and amplitude, the number and diameter of myelinated nerve fibers, and sciatic functional index were significantly increased in the treated rats. These results verified that intraoperative electric stimulation and decimeter wave therapy contributed to the regeneration and the recovery of the functions in the compressed nerves.
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Affiliation(s)
- Feng Zhao
- Department of Orthopedics, the First Hospital of Hebei Medical University, Shijiazhuang 050031, Hebei Province, China
| | - Wei He
- Department of Hand Surgery, the Third Hospital of Hebei Medical University, Shijiazhuang 050051, Hebei Province, China
| | - Yingze Zhang
- Department of Hand Surgery, the Third Hospital of Hebei Medical University, Shijiazhuang 050051, Hebei Province, China
| | - Dehu Tian
- Department of Hand Surgery, the Third Hospital of Hebei Medical University, Shijiazhuang 050051, Hebei Province, China
| | - Hongfang Zhao
- Department of Hand Surgery, the Third Hospital of Hebei Medical University, Shijiazhuang 050051, Hebei Province, China
| | - Kunlun Yu
- Department of Hand Surgery, the Third Hospital of Hebei Medical University, Shijiazhuang 050051, Hebei Province, China
| | - Jiangbo Bai
- Department of Hand Surgery, the Third Hospital of Hebei Medical University, Shijiazhuang 050051, Hebei Province, China
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Shakhbazau A, Mohanty C, Kumar R, Midha R. Sensory recovery after cell therapy in peripheral nerve repair: effects of naïve and skin precursor-derived Schwann cells. J Neurosurg 2014; 121:423-31. [DOI: 10.3171/2014.5.jns132132] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Object
Cell therapy is a promising candidate among biological or technological innovations sought to augment microsurgical techniques in peripheral nerve repair. This report describes long-term functional regenerative effects of cell therapy in the rat injury model with a focus on sensory recovery.
Methods
Schwann cells were derived from isogenic nerve or skin precursor cells and injected into the transected and immediately repaired sciatic nerve distal to the injury site. Sensory recovery was assessed at weeks 4, 7, and 10. Axonal regeneration was assessed at Week 11.
Results
By Week 10, thermal sensitivity in cell therapy groups returned to a level indistinguishable from the baseline (p > 0.05). Immunohistochemistry at 11 weeks after injury showed improved regeneration of NF+ and IB4+ axons.
Conclusions:
The results of this study show that cell therapy significantly improves thermal sensation and the number of regenerated sensory neurons at 11 weeks after injury. These findings contribute to the view of skin-derived stem cells as a reliable source of Schwann cells with therapeutic potential for functional recovery in damaged peripheral nerve.
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Affiliation(s)
- Antos Shakhbazau
- 1Department of Clinical Neuroscience, Faculty of Medicine,
- 2Hotchkiss Brain Institute, and
| | | | - Ranjan Kumar
- 1Department of Clinical Neuroscience, Faculty of Medicine,
- 2Hotchkiss Brain Institute, and
- 3Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Rajiv Midha
- 1Department of Clinical Neuroscience, Faculty of Medicine,
- 2Hotchkiss Brain Institute, and
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Ramburrun P, Kumar P, Choonara YE, Bijukumar D, du Toit LC, Pillay V. A review of bioactive release from nerve conduits as a neurotherapeutic strategy for neuronal growth in peripheral nerve injury. BIOMED RESEARCH INTERNATIONAL 2014; 2014:132350. [PMID: 25143934 PMCID: PMC4131113 DOI: 10.1155/2014/132350] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Accepted: 05/04/2014] [Indexed: 02/07/2023]
Abstract
Peripheral nerve regeneration strategies employ the use of polymeric engineered nerve conduits encompassed with components of a delivery system. This allows for the controlled and sustained release of neurotrophic growth factors for the enhancement of the innate regenerative capacity of the injured nerves. This review article focuses on the delivery of neurotrophic factors (NTFs) and the importance of the parameters that control release kinetics in the delivery of optimal quantities of NTFs for improved therapeutic effect and prevention of dose dumping. Studies utilizing various controlled-release strategies, in attempt to obtain ideal release kinetics, have been reviewed in this paper. Release strategies discussed include affinity-based models, crosslinking techniques, and layer-by-layer technologies. Currently available synthetic hollow nerve conduits, an alternative to the nerve autografts, have proven to be successful in the bridging and regeneration of primarily the short transected nerve gaps in several patient cases. However, current research emphasizes on the development of more advanced nerve conduits able to simulate the effectiveness of the autograft which includes, in particular, the ability to deliver growth factors.
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Affiliation(s)
- Poornima Ramburrun
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, 7 York Road, Parktown, Johannesburg 2193, South Africa
| | - Pradeep Kumar
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, 7 York Road, Parktown, Johannesburg 2193, South Africa
| | - Yahya E. Choonara
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, 7 York Road, Parktown, Johannesburg 2193, South Africa
| | - Divya Bijukumar
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, 7 York Road, Parktown, Johannesburg 2193, South Africa
| | - Lisa C. du Toit
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, 7 York Road, Parktown, Johannesburg 2193, South Africa
| | - Viness Pillay
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, 7 York Road, Parktown, Johannesburg 2193, South Africa
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Allodi I, Mecollari V, González-Pérez F, Eggers R, Hoyng S, Verhaagen J, Navarro X, Udina E. Schwann cells transduced with a lentiviral vector encoding Fgf-2 promote motor neuron regeneration following sciatic nerve injury. Glia 2014; 62:1736-46. [PMID: 24989458 DOI: 10.1002/glia.22712] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Revised: 06/12/2014] [Accepted: 06/16/2014] [Indexed: 01/07/2023]
Abstract
Fibroblast growth factor 2 (FGF-2) is a trophic factor expressed by glial cells and different neuronal populations. Addition of FGF-2 to spinal cord and dorsal root ganglia (DRG) explants demonstrated that FGF-2 specifically increases motor neuron axonal growth. To further explore the potential capability of FGF-2 to promote axon regeneration, we produced a lentiviral vector (LV) to overexpress FGF-2 (LV-FGF2) in the injured rat peripheral nerve. Cultured Schwann cells transduced with FGF-2 and added to collagen matrix embedding spinal cord or DRG explants significantly increased motor but not sensory neurite outgrowth. LV-FGF2 was as effective as direct addition of the trophic factor to promote motor axon growth in vitro. Direct injection of LV-FGF2 into the rat sciatic nerve resulted in increased expression of FGF-2, which was localized in the basal lamina of Schwann cells. To investigate the in vivo effect of FGF-2 overexpression on axonal regeneration after nerve injury, Schwann cells transduced with LV-FGF2 were grafted in a silicone tube used to repair the resected rat sciatic nerve. Electrophysiological tests conducted for up to 2 months after injury revealed accelerated and more marked reinnervation of hindlimb muscles in the animals treated with LV-FGF2, with an increase in the number of motor and sensory neurons that reached the distal tibial nerve at the end of follow-up.
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Affiliation(s)
- Ilary Allodi
- Institute of Neurosciences and Department of Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, and Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Bellaterra, Spain
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48
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Wu-Fienberg Y, Moore AM, Marquardt LM, Newton P, Johnson PJ, Mackinnon SE, Sakiyama-Elbert SE, Wood MD. Viral transduction of primary Schwann cells using a Cre-lox system to regulate GDNF expression. Biotechnol Bioeng 2014; 111:1886-94. [PMID: 24728940 DOI: 10.1002/bit.25247] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2013] [Revised: 02/21/2014] [Accepted: 03/24/2014] [Indexed: 11/06/2022]
Abstract
Glial cell-line-derived neurotrophic factor (GDNF) is a potent neurotrophic factor known to enhance motor nerve regeneration following its delivery. However, recent studies have determined that extended GDNF delivery to regenerating axons can entrap motor axons at the site of GDNF delivery. This entrapment leads to reduced motor axons available to reinnervate muscle. To address this issue, we designed a cell-based GDNF expression system that can temporally regulate protein expression using an inducible gene excision mechanism to prevent entrapment at the site of expression. To design this system for regulation of GDNF expression, we transduced two lentiviral vectors, one containing a constitutively active GDNF transgene flanked by two loxP sites, and the other containing a tetracycline-inducible cre transgene along with its constitutively active transactivator, into Schwann cells (SCs). These SCs over-express GDNF, but expression can be suppressed through the administration of tetracycline family antibiotics, such as doxycycline. The engineered SCs produced significantly more GDNF as compared to untransduced controls, as measured by enzyme-linked immunosorbent assay (ELISA). Following doxycycline treatment, these SCs produced significantly lower levels of GDNF and induced less neurite extension as compared to untreated SCs. Engineered SCs treated with doxycycline showed a marked increase in Cre recombinase expression, as visualized by immunohistochemistry (IHC), providing evidence of a mechanism for the observed changes in GDNF expression levels and biological activity. This cell-based GDNF expression system could have potential for future in vivo studies to provide a temporally controlled GDNF source to promote axon growth.
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Affiliation(s)
- Yuewei Wu-Fienberg
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Washington University School of Medicine, Campus Box 8238, 660 South Euclid Avenue, St. Louis, Missouri, 63110
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49
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Richner M, Ulrichsen M, Elmegaard SL, Dieu R, Pallesen LT, Vaegter CB. Peripheral nerve injury modulates neurotrophin signaling in the peripheral and central nervous system. Mol Neurobiol 2014; 50:945-70. [PMID: 24752592 DOI: 10.1007/s12035-014-8706-9] [Citation(s) in RCA: 108] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2013] [Accepted: 04/01/2014] [Indexed: 12/21/2022]
Abstract
Peripheral nerve injury disrupts the normal functions of sensory and motor neurons by damaging the integrity of axons and Schwann cells. In contrast to the central nervous system, the peripheral nervous system possesses a considerable capacity for regrowth, but regeneration is far from complete and functional recovery rarely returns to pre-injury levels. During development, the peripheral nervous system strongly depends upon trophic stimulation for neuronal differentiation, growth and maturation. The perhaps most important group of trophic substances in this context is the neurotrophins (NGF, BDNF, NT-3 and NT-4/5), which signal in a complex spatial and timely manner via the two structurally unrelated p75(NTR) and tropomyosin receptor kinase (TrkA, Trk-B and Trk-C) receptors. Damage to the adult peripheral nerves induces cellular mechanisms resembling those active during development, resulting in a rapid and robust increase in the synthesis of neurotrophins in neurons and Schwann cells, guiding and supporting regeneration. Furthermore, the injury induces neurotrophin-mediated changes in the dorsal root ganglia and in the spinal cord, which affect the modulation of afferent sensory signaling and eventually may contribute to the development of neuropathic pain. The focus of this review is on the expression patterns of neurotrophins and their receptors in neurons and glial cells of the peripheral nervous system and the spinal cord. Furthermore, injury-induced changes of expression patterns and the functional consequences in relation to axonal growth and remyelination as well as to neuropathic pain development will be reviewed.
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Affiliation(s)
- Mette Richner
- Danish Research Institute of Translational Neuroscience DANDRITE, Nordic EMBL Partnership, and Lundbeck Foundation Research Center MIND, Department of Biomedicine, Aarhus University, Ole Worms Allé 3, 8000, Aarhus C, Denmark
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50
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Doxycycline-regulated GDNF expression promotes axonal regeneration and functional recovery in transected peripheral nerve. J Control Release 2013; 172:841-51. [PMID: 24140746 DOI: 10.1016/j.jconrel.2013.10.004] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2013] [Revised: 09/25/2013] [Accepted: 10/04/2013] [Indexed: 12/27/2022]
Abstract
Increased production of neurotrophic factors (NTFs) is one of the key responses seen following peripheral nerve injury, making them an attractive choice for pro-regenerative gene therapies. However, the downside of over-expression of certain NTFs, including glial cell line-derived neurotrophic factor (GDNF), was earlier found to be the trapping and misdirection of regenerating axons, the so-called 'candy-store' effect. We report a proof-of-principle study on the application of conditional GDNF expression system in injured peripheral nerve. We engineered Schwann cells (SCs) using dendrimers or lentiviral transduction with the vector providing doxycycline-regulated GDNF expression. Injection of GDNF-modified cells into the injured peripheral nerve followed by time-restricted administration of doxycycline demonstrated that GDNF expression in SCs can also be controlled locally in the peripheral nerves of the experimental animals. Cell-based GDNF therapy was shown to increase the extent of axonal regeneration, while controlled deactivation of GDNF effectively prevented trapping of regenerating axons in GDNF-enriched areas, and was associated with improved functional recovery.
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