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Svačina MKR, Gao T, Sprenger-Svačina A, Lin J, Ganesh BP, Lee J, McCullough LD, Sheikh KA, Zhang G. Rejuvenating fecal microbiota transplant enhances peripheral nerve repair in aged mice by modulating endoneurial inflammation. Exp Neurol 2024; 376:114774. [PMID: 38599367 DOI: 10.1016/j.expneurol.2024.114774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 03/28/2024] [Accepted: 04/06/2024] [Indexed: 04/12/2024]
Abstract
Peripheral nerve injury (PNI) resulting from trauma or neuropathies can cause significant disability, and its prognosis deteriorates with age. Emerging evidence suggests that gut dysbiosis and reduced fecal short-chain fatty acids (SCFAs) contribute to an age-related systemic hyperinflammation (inflammaging), which hinders nerve recovery after injury. This study thus aimed to evaluate the pro-regenerative effects of a rejuvenating fecal microbiota transplant (FMT) in a preclinical PNI model using aged mice. Aged C57BL/6 mice underwent bilateral crush injuries to their sciatic nerves. Subsequently, they either received FMT from young donors at three and four days after the injury or retained their aged gut microbiota. We analyzed gut microbiome composition and SCFA concentrations in fecal samples. The integrity of the ileac mucosal barrier was assessed by immunofluorescence staining of Claudin-1. Flow cytometry was utilized to examine immune cells and cytokine production in the ileum, spleen, and sciatic nerve. Various assessments, including behavioural tests, electrophysiological studies, and morphometrical analyses, were conducted to evaluate peripheral nerve function and repair following injury. Rejuvenating FMT reversed age-related gut dysbiosis by increasing Actinobacteria, especially Bifidobacteriales genera. This intervention also led to an elevation of gut SCFA levels and mitigated age-related ileac mucosal leakiness in aged recipients. Additionally, it augmented the number of T-helper 2 (Th2) and regulatory T (Treg) cells in the ileum and spleen, with the majority being positive for anti-inflammatory interleukin-10 (IL-10). In sciatic nerves, rejuvenating FMT resulted in increased M2 macrophage counts and a higher IL-10 production by IL-10+TNF-α- M2 macrophage subsets. Ultimately, restoring a youthful gut microbiome in aged mice led to improved nerve repair and enhanced functional recovery after PNI. Considering that FMT is already a clinically available technique, exploring novel translational strategies targeting the gut microbiome to enhance nerve repair in the elderly seems promising and warrants further evaluation.
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Affiliation(s)
- Martin K R Svačina
- Department of Neurology, McGovern Medical School, The University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX 77030, USA; Department of Neurology, Faculty of Medicine and University Hospital of Cologne, Kerpener Str. 62, 50937 Cologne, Germany
| | - Tong Gao
- Department of Neurology, McGovern Medical School, The University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX 77030, USA
| | - Alina Sprenger-Svačina
- Department of Neurology, McGovern Medical School, The University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX 77030, USA; Department of Neurology, Faculty of Medicine and University Hospital of Cologne, Kerpener Str. 62, 50937 Cologne, Germany
| | - Jianxin Lin
- Department of Neurology, McGovern Medical School, The University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX 77030, USA
| | - Bhanu P Ganesh
- Department of Neurology, McGovern Medical School, The University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX 77030, USA
| | - Juneyoung Lee
- Department of Neurology, McGovern Medical School, The University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX 77030, USA
| | - Louise D McCullough
- Department of Neurology, McGovern Medical School, The University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX 77030, USA
| | - Kazim A Sheikh
- Department of Neurology, McGovern Medical School, The University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX 77030, USA
| | - Gang Zhang
- Department of Neurology, McGovern Medical School, The University of Texas Health Science Center at Houston, 6431 Fannin Street, Houston, TX 77030, USA.
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Bolívar S, Sanz E, Ovelleiro D, Zochodne DW, Udina E. Neuron-specific RNA-sequencing reveals different responses in peripheral neurons after nerve injury. eLife 2024; 12:RP91316. [PMID: 38742628 PMCID: PMC11093584 DOI: 10.7554/elife.91316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2024] Open
Abstract
Peripheral neurons are heterogeneous and functionally diverse, but all share the capability to switch to a pro-regenerative state after nerve injury. Despite the assumption that the injury response is similar among neuronal subtypes, functional recovery may differ. Understanding the distinct intrinsic regenerative properties between neurons may help to improve the quality of regeneration, prioritizing the growth of axon subpopulations to their targets. Here, we present a comparative analysis of regeneration across four key peripheral neuron populations: motoneurons, proprioceptors, cutaneous mechanoreceptors, and nociceptors. Using Cre/Ai9 mice that allow fluorescent labeling of neuronal subtypes, we found that nociceptors showed the greater regeneration after a sciatic crush, followed by motoneurons, mechanoreceptors, and, finally, proprioceptors. By breeding these Cre mice with Ribotag mice, we isolated specific translatomes and defined the regenerative response of these neuronal subtypes after axotomy. Only 20% of the regulated genes were common, revealing a diverse response to injury among neurons, which was also supported by the differential influence of neurotrophins among neuron subtypes. Among differentially regulated genes, we proposed MED12 as a specific regulator of the regeneration of proprioceptors. Altogether, we demonstrate that the intrinsic regenerative capacity differs between peripheral neuron subtypes, opening the door to selectively modulate these responses.
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Affiliation(s)
- Sara Bolívar
- Institute of Neurosciences, and Department Cell Biology, Physiology and Immunology, Universitat Autònoma de BarcelonaBellaterraSpain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas, Instituto de Salud Carlos IIIMadridSpain
| | - Elisenda Sanz
- Institute of Neurosciences, and Department Cell Biology, Physiology and Immunology, Universitat Autònoma de BarcelonaBellaterraSpain
| | - David Ovelleiro
- Peripheral Nervous System, Vall d'Hebron Institut de Recerca (VHIR), Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital CampusBarcelonaSpain
| | - Douglas W Zochodne
- Division of Neurology, Department of Medicine and the Neuroscience and Mental Health Institute, University of AlbertaEdmontonCanada
| | - Esther Udina
- Institute of Neurosciences, and Department Cell Biology, Physiology and Immunology, Universitat Autònoma de BarcelonaBellaterraSpain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas, Instituto de Salud Carlos IIIMadridSpain
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Wang Z, Li S, Wu Z, Kang Y, Xie S, Cai Z, Shan X, Li Q. Pulsed electromagnetic field-assisted reduced graphene oxide composite 3D printed nerve scaffold promotes sciatic nerve regeneration in rats. Biofabrication 2024; 16:035013. [PMID: 38604162 DOI: 10.1088/1758-5090/ad3d8a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Accepted: 04/11/2024] [Indexed: 04/13/2024]
Abstract
Peripheral nerve injuries can lead to sensory or motor deficits that have a serious impact on a patient's mental health and quality of life. Nevertheless, it remains a major clinical challenge to develop functional nerve conduits as an alternative to autologous grafts. We applied reduced graphene oxide (rGO) as a bioactive conductive material to impart electrophysiological properties to a 3D printed scaffold and the application of a pulsed magnetic field to excite the formation of microcurrents and induce nerve regeneration.In vitrostudies showed that the nerve scaffold and the pulsed magnetic field made no effect on cell survival, increased S-100βprotein expression, enhanced cell adhesion, and increased the expression level of nerve regeneration-related mRNAs.In vivoexperiments suggested that the protocol was effective in promoting nerve regeneration, resulting in functional recovery of sciatic nerves in rats, when they were damaged close to that of the autologous nerve graft, and increased expression of S-100β, NF200, and GAP43. These results indicate that rGO composite nerve scaffolds combined with pulsed magnetic field stimulation have great potential for peripheral nerve rehabilitation.
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Affiliation(s)
- Zichao Wang
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing 100081, People's Republic of China
- National Center for Stomatology, Beijing 100081, People's Republic of China
- National Clinical Research Center for Oral Diseases, Beijing 100081, People's Republic of China
- National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing 100081, People's Republic of China
- Beijing Key Laboratory of Digital Stomatology and NHC Key Laboratory of Digital Stomatology and NMPA Key Laboratory for Dental Materials, Beijing 100081, People's Republic of China
| | - Shijun Li
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing 100081, People's Republic of China
- National Center for Stomatology, Beijing 100081, People's Republic of China
- National Clinical Research Center for Oral Diseases, Beijing 100081, People's Republic of China
- National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing 100081, People's Republic of China
- Beijing Key Laboratory of Digital Stomatology and NHC Key Laboratory of Digital Stomatology and NMPA Key Laboratory for Dental Materials, Beijing 100081, People's Republic of China
| | - Zongxi Wu
- Department of Oral and Maxillofacial Surgery, Hospital of Stomatology, Sun Yat-sen University, Guangzhou 510030, People's Republic of China
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510030, People's Republic of China
| | - Yifan Kang
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing 100081, People's Republic of China
- National Center for Stomatology, Beijing 100081, People's Republic of China
- National Clinical Research Center for Oral Diseases, Beijing 100081, People's Republic of China
- National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing 100081, People's Republic of China
- Beijing Key Laboratory of Digital Stomatology and NHC Key Laboratory of Digital Stomatology and NMPA Key Laboratory for Dental Materials, Beijing 100081, People's Republic of China
| | - Shang Xie
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing 100081, People's Republic of China
- National Center for Stomatology, Beijing 100081, People's Republic of China
- National Clinical Research Center for Oral Diseases, Beijing 100081, People's Republic of China
- National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing 100081, People's Republic of China
- Beijing Key Laboratory of Digital Stomatology and NHC Key Laboratory of Digital Stomatology and NMPA Key Laboratory for Dental Materials, Beijing 100081, People's Republic of China
| | - Zhigang Cai
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing 100081, People's Republic of China
- National Center for Stomatology, Beijing 100081, People's Republic of China
- National Clinical Research Center for Oral Diseases, Beijing 100081, People's Republic of China
- National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing 100081, People's Republic of China
- Beijing Key Laboratory of Digital Stomatology and NHC Key Laboratory of Digital Stomatology and NMPA Key Laboratory for Dental Materials, Beijing 100081, People's Republic of China
| | - Xiaofeng Shan
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing 100081, People's Republic of China
- National Center for Stomatology, Beijing 100081, People's Republic of China
- National Clinical Research Center for Oral Diseases, Beijing 100081, People's Republic of China
- National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing 100081, People's Republic of China
- Beijing Key Laboratory of Digital Stomatology and NHC Key Laboratory of Digital Stomatology and NMPA Key Laboratory for Dental Materials, Beijing 100081, People's Republic of China
| | - Qing Li
- National Center for Stomatology, Beijing 100081, People's Republic of China
- National Clinical Research Center for Oral Diseases, Beijing 100081, People's Republic of China
- National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing 100081, People's Republic of China
- Center of Digital Dentistry, Second Clinical Division, Peking University School and Hospital of Stomatology and National Center of Stomatology, Beijing 100081, People's Republic of China
- Beijing Key Laboratory of Digital Stomatology and NHC Key Laboratory of Digital Stomatology and NMPA Key Laboratory for Dental Materials, Beijing 100081, People's Republic of China
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Sun R, Lang Y, Chang MW, Zhao M, Li C, Liu S, Wang B. Leveraging Oriented Lateral Walls of Nerve Guidance Conduit with Core-Shell MWCNTs Fibers for Peripheral Nerve Regeneration. Adv Healthc Mater 2024; 13:e2303867. [PMID: 38258406 DOI: 10.1002/adhm.202303867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Indexed: 01/24/2024]
Abstract
Peripheral nerve regeneration and functional recovery rely on the chemical, physical, and structural properties of nerve guidance conduits (NGCs). However, the limited support for long-distance nerve regeneration and axonal guidance has hindered the widespread use of NGCs. This study introduces a novel nerve guidance conduit with oriented lateral walls, incorporating multi-walled carbon nanotubes (MWCNTs) within core-shell fibers prepared in a single step using a modified electrohydrodynamic (EHD) printing technique to promote peripheral nerve regeneration. The structured conduit demonstrated exceptional stability, mechanical properties, and biocompatibility, significantly enhancing the functionality of NGCs. In vitro cell studies revealed that RSC96 cells adhered and proliferated effectively along the oriented fibers, demonstrating a favorable response to the distinctive architectures and properties. Subsequently, a rat sciatic nerve injury model demonstrated effective efficacy in promoting peripheral nerve regeneration and functional recovery. Tissue analysis and functional testing highlighted the significant impact of MWCNT concentration in enhancing peripheral nerve regeneration and confirming well-matured aligned axonal growth, muscle recovery, and higher densities of myelinated axons. These findings demonstrate the potential of oriented lateral architectures with coaxial MWCNT fibers as a promising approach to support long-distance regeneration and encourage directional nerve growth for peripheral nerve repair in clinical applications.
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Affiliation(s)
- Renyuan Sun
- State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Tianjin Key Laboratory of Bio-Electromagnetic and Neural Engineering, Hebei Key Laboratory of Bioelectromagnetics and Neuroengineering, School of Health Sciences and Biomedical Engineering, Hebei University of Technology, Tianjin, 300132, China
| | - Yuna Lang
- State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Tianjin Key Laboratory of Bio-Electromagnetic and Neural Engineering, Hebei Key Laboratory of Bioelectromagnetics and Neuroengineering, School of Health Sciences and Biomedical Engineering, Hebei University of Technology, Tianjin, 300132, China
| | - Ming-Wei Chang
- Nanotechnology and Integrated Bioengineering Centre, University of Ulster, Belfast, BT15 1AP, UK
| | - Mingkang Zhao
- State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Tianjin Key Laboratory of Bio-Electromagnetic and Neural Engineering, Hebei Key Laboratory of Bioelectromagnetics and Neuroengineering, School of Health Sciences and Biomedical Engineering, Hebei University of Technology, Tianjin, 300132, China
| | - Chao Li
- State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Tianjin Key Laboratory of Bio-Electromagnetic and Neural Engineering, Hebei Key Laboratory of Bioelectromagnetics and Neuroengineering, School of Health Sciences and Biomedical Engineering, Hebei University of Technology, Tianjin, 300132, China
| | - Shiheng Liu
- State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Tianjin Key Laboratory of Bio-Electromagnetic and Neural Engineering, Hebei Key Laboratory of Bioelectromagnetics and Neuroengineering, School of Health Sciences and Biomedical Engineering, Hebei University of Technology, Tianjin, 300132, China
| | - Baolin Wang
- State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Tianjin Key Laboratory of Bio-Electromagnetic and Neural Engineering, Hebei Key Laboratory of Bioelectromagnetics and Neuroengineering, School of Health Sciences and Biomedical Engineering, Hebei University of Technology, Tianjin, 300132, China
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Yu P, Shen J, Li H. Comments on article by Arbash M et al.: Incidence, risk factors, and prognosis of sciatic nerve injury in acetabular fractures: a retrospective cross‑sectional study. Int Orthop 2024; 48:1361-1362. [PMID: 38430225 DOI: 10.1007/s00264-024-06109-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Accepted: 01/25/2024] [Indexed: 03/03/2024]
Affiliation(s)
- Pengzheng Yu
- Hangzhou Xiaoshan Orthopedics Traditional Chinese Medicine Hospital, NO.79, Jinxiu Road, Daicun Town, Xiaoshan District, Hangzhou, Zhejiang, China
| | - Jiao Shen
- Department of Orthopaedic Surgery, The First People's Hospital of Xiaoshan District, Xiaoshan Affiliated Hospital of Wenzhou Medical University, NO.199, Shixin South Road, Xiaoshan District, Hangzhou, Zhejiang, China
| | - Hang Li
- Department of Orthopaedic Surgery, The First People's Hospital of Xiaoshan District, Xiaoshan Affiliated Hospital of Wenzhou Medical University, NO.199, Shixin South Road, Xiaoshan District, Hangzhou, Zhejiang, China.
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6
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Uzunlu EO, Oğurtan Z. Comparative evaluation of bone marrow and dental pulp mesenchymal stem cells for motor functional recovery in rat sciatic nerve injury. J Cell Mol Med 2024; 28:e18340. [PMID: 38685681 PMCID: PMC11058327 DOI: 10.1111/jcmm.18340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 03/27/2024] [Accepted: 04/05/2024] [Indexed: 05/02/2024] Open
Abstract
This study delves into the impact of mesenchymal stem cells derived from bone marrow (BM-MSCs) and those sourced from dental pulp (DP-MSCs) on the recovery of motor function and morphological aspects of the rat's sciatic nerve after crush injuries. The findings highlight that the groups treated with BM-MSCs, DP-MSCs or a combination of both (BM + DP-MSCs) displayed enhanced sciatic functional index values when juxtaposed with the sham group. This points to bettered motor functionalities. A deeper morphological analysis showed that all the groups had retained perineurium structure and fascicular arrangement. Notably, the sham and BM-MSCs groups had very few inconsistencies. All groups showed standard vascular density. Remarkably, the combined treatment group (BM + DP-MSCs) presented diminished oedema and a lower count of inflammatory cells. Through immunohistochemical methods, the presence of S100 expression was noted in the groups that underwent treatment. In summation, the study suggests that both BM-MSCs and DP-MSCs, whether used singly or in combination, can significantly aid in motor function restoration and morphological enhancements. An interesting observation from our research and earlier studies is that stem cells from dental pulp, which are sourced with less discomfort from milk and wisdom teeth, show a heightened propensity to evolve into nerve cells. This is in contrast to the more uncomfortably acquired BM-MSCs.
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Affiliation(s)
- Elgin Orçum Uzunlu
- Surgery Department, Faculty of Veterinary MedicineSelcuk UniversityKonyaTurkey
| | - Zeki Oğurtan
- Surgery Department, Faculty of Veterinary MedicineSelcuk UniversityKonyaTurkey
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Dell'Apa D, Auletta L, Okonji S, Cauduro A, Dondi M, Opreni M, Gandini G, Bianchi E. Traumatic and iatrogenic sciatic nerve injury in 38 dogs and 10 cats: Clinical and electrodiagnostic findings. J Vet Intern Med 2024; 38:1626-1638. [PMID: 38634245 PMCID: PMC11099794 DOI: 10.1111/jvim.17076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Accepted: 04/01/2024] [Indexed: 04/19/2024] Open
Abstract
BACKGROUND Reports describing sciatic nerve injuries (SNI) and their outcome are scarce in veterinary medicine. HYPOTHESIS Describe the causes of traumatic and iatrogenic SNI and evaluate which clinical and electrodiagnostic findings predict outcome. ANIMALS Thirty-eight dogs and 10 cats with confirmed SNI referred for neurologic and electrodiagnostic evaluation. METHODS Clinical and electrodiagnostic examination results, including electromyography (EMG), motor nerve conduction studies, muscle-evoked potential (MEP), F-waves, sensory nerve conduction studies, and cord dorsum potential (CDP), were retrospectively evaluated. Quality of life (QoL) was assessed based on owner interviews. RESULTS Surgery (42%) and trauma (33%) were the most common causes of SNI; in dogs, 24% were caused by bites from wild boars. Ability to flex and extend the tarsus was significantly associated with positive outcome in dogs. Mean time from onset of clinical signs until electrodiagnostic evaluation was 67 ± 65 (range, 7-300) days and 65 ± 108 (range, 7-365) days for dogs and cats, respectively. A cut-off amplitude of 1.45 mV for compound motor action potentials (CMAP) was predictive of positive outcome in dogs (P = .01), with sensitivity of 58% and specificity of 100%. CONCLUSIONS AND CLINICAL IMPORTANCE Clinical motor function predicts recovery better than sensory function. Electrodiagnostic findings also may play a role in predicting the outcome of SNI. Application of the proposed CMAP cut-off amplitude may assist clinicians in shortening the time to reassessment or for earlier suggestion of salvage procedures. Owners perceived a good quality of life (QoL), even in cases of hindlimb amputation.
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Affiliation(s)
| | - Luigi Auletta
- Department of Veterinary Medicine and Animal Sciences (DIVAS)University of MilanMilanItaly
| | - Samuel Okonji
- Department of Veterinary Medical ScienceUniversity of BolognaBolognaItaly
| | | | - Maurizio Dondi
- Department of Veterinary ScienceUniversity of ParmaParmaItaly
| | | | - Gualtiero Gandini
- Department of Veterinary Medical ScienceUniversity of BolognaBolognaItaly
| | - Ezio Bianchi
- Department of Veterinary ScienceUniversity of ParmaParmaItaly
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Meng D, Xu Q, Chen Z, Pan J, Jiang L, Zou J, Yuan Y, Zhang J, Lineaweaver WC, Zhang F. Repair of Sciatic Nerve Defect in Rats With Acellular Nerve Allograft Carrying Vascular Endothelial Cells. Ann Plast Surg 2024; 92:585-590. [PMID: 38685498 DOI: 10.1097/sap.0000000000003941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
BACKGROUND Acellular nerve allografts (ANAs) were developed to replace the autologous nerve grafts (ANGs) to fill the peripheral nerve defects. Poor vascularization relative to ANGs has been a limitation of application of ANAs. METHODS A total of 60 female Sprague-Dawley rats were assigned 3 groups. The rats in A group received ANGs, the rats in B group received ANAs, and the rats in C group were transplanted with ANA carrying endothelial cells (ANA + ECs). In the 1st, 2nd, 4th, and 12th postoperative weeks, 5 rats were selected from each group for evaluating sciatic function index (SFI), electrophysiology, maximum tetanic force recovery rate, tibialis anterior muscle weights recovery rate, and microvessel density. In the 12th postoperative week, the nerves were harvested and stained with toluidine blue and observed under an electron microscope to compare nerve fibers, myelin width, and G-ratio. RESULTS All the rats survived. In the first and second postoperative weeks, more microvessels were found in the ANA + EC group. In the 12th postoperative week, the nerve fibers were more numerous, and G-ratio was smaller in the C group compared with the B group. The compound muscle action potential and maximum tetanic force recovery rate in the tibialis anterior muscle in the C group were better than those in the B group in the 12th postoperative week. The A group showed better performances in electrophysiology, maximum tetanic force, muscle wet weight, and nerve regeneration. CONCLUSION ANA + ECs can promote early angiogenesis, promoting nerve regeneration and neurological function recovery.
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Affiliation(s)
- Dehua Meng
- From the Department of Orthopedic Surgery, Zhongshan Hospital Fudan University, Shanghai, China
| | - Qintong Xu
- From the Department of Orthopedic Surgery, Zhongshan Hospital Fudan University, Shanghai, China
| | - Zenggan Chen
- From the Department of Orthopedic Surgery, Zhongshan Hospital Fudan University, Shanghai, China
| | - Jianfeng Pan
- Department of Orthopedics, Shanghai Tenth People's Hospital, School of Medicine, Tongji University
| | - Libo Jiang
- From the Department of Orthopedic Surgery, Zhongshan Hospital Fudan University, Shanghai, China
| | - Jiapeng Zou
- From the Department of Orthopedic Surgery, Zhongshan Hospital Fudan University, Shanghai, China
| | - Yaqin Yuan
- Center for Immune-Related Diseases at Shanghai Institute of Immunology, Department of Immunology and Microbiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jian Zhang
- From the Department of Orthopedic Surgery, Zhongshan Hospital Fudan University, Shanghai, China
| | | | - Feng Zhang
- From the Department of Orthopedic Surgery, Zhongshan Hospital Fudan University, Shanghai, China
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Wang J, Yuan Y, Zhang S, Lu S, Han G, Bian M, huang L, Meng D, Su D, Xiao L, Xiao Y, Zhang J, Gong N, Jiang L. Remodeling of the Intra-Conduit Inflammatory Microenvironment to Improve Peripheral Nerve Regeneration with a Neuromechanical Matching Protein-Based Conduit. Adv Sci (Weinh) 2024; 11:e2302988. [PMID: 38430538 PMCID: PMC11077661 DOI: 10.1002/advs.202302988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 12/22/2023] [Indexed: 03/04/2024]
Abstract
Peripheral nerve injury (PNI) remains a challenging area in regenerative medicine. Nerve guide conduit (NGC) transplantation is a common treatment for PNI, but the prognosis of NGC treatment is unsatisfactory due to 1) neuromechanical unmatching and 2) the intra-conduit inflammatory microenvironment (IME) resulting from Schwann cell pyroptosis and inflammatory-polarized macrophages. A neuromechanically matched NGC composed of regenerated silk fibroin (RSF) loaded with poly(3,4-ethylenedioxythiophene): poly(styrene sulfonate) (P:P) and dimethyl fumarate (DMF) are designed, which exhibits a matched elastic modulus (25.1 ± 3.5 MPa) for the peripheral nerve and the highest 80% elongation at break, better than most protein-based conduits. Moreover, the NGC can gradually regulate the intra-conduit IME by releasing DMF and monitoring sciatic nerve movements via piezoresistive sensing. The combination of NGC and electrical stimulation modulates the IME to support PNI regeneration by synergistically inhibiting Schwann cell pyroptosis and reducing inflammatory factor release, shifting macrophage polarization from the inflammatory M1 phenotype to the tissue regenerative M2 phenotype and resulting in functional recovery of neurons. In a rat sciatic nerve crush model, NGC promoted remyelination and functional and structural regeneration. Generally, the DMF/RSF/P:P conduit provides a new potential therapeutic approach to promote nerve repair in future clinical treatments.
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Affiliation(s)
- Jia‐Yi Wang
- Department of Orthopaedic SurgeryZhongshan HospitalFudan UniversityShanghai200032China
| | - Ya Yuan
- Department of Orthopaedic SurgeryZhongshan HospitalFudan UniversityShanghai200032China
- Department of RehabilitationZhongshan HospitalFudan UniversityShanghai200032China
| | - Shu‐Yan Zhang
- The Key Laboratory for Ultrafine Materials of Ministry of Education, Engineering Research Centre for Biomedical Materials of Ministry of EducationFrontiers Science Center for Materiobiology and Dynamic ChemistrySchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai200237China
| | - Shun‐Yi Lu
- Department of Orthopaedic SurgeryZhongshan HospitalFudan UniversityShanghai200032China
| | - Guan‐Jie Han
- Department of Orthopaedic SurgeryZhongshan HospitalFudan UniversityShanghai200032China
| | - Meng‐Xuan Bian
- Department of Orthopaedic SurgeryZhongshan HospitalFudan UniversityShanghai200032China
| | - Lei huang
- Department of Orthopaedic SurgeryZhongshan HospitalFudan UniversityShanghai200032China
| | - De‐Hua Meng
- Department of Orthopaedic SurgeryZhongshan HospitalFudan UniversityShanghai200032China
| | - Di‐Han Su
- Department of Orthopaedic SurgeryZhongshan HospitalFudan UniversityShanghai200032China
| | - Lan Xiao
- School of MechanicalMedical and Process EngineeringCentre for Biomedical TechnologiesQueensland University of TechnologyBrisbane4059Australia
- Australia‐China Centre for Tissue Engineering and Regenerative MedicineQueensland University of TechnologyBrisbane4059Australia
| | - Yin Xiao
- School of MechanicalMedical and Process EngineeringCentre for Biomedical TechnologiesQueensland University of TechnologyBrisbane4059Australia
- Australia‐China Centre for Tissue Engineering and Regenerative MedicineQueensland University of TechnologyBrisbane4059Australia
- School of Medicine and Dentistry & Menzies Health Institute QueenslandGriffith UniversityGold Coast4222Australia
| | - Jian Zhang
- Department of Orthopaedic SurgeryZhongshan HospitalFudan UniversityShanghai200032China
| | - Ning‐Ji Gong
- Department of EmergencyDepartment of OrthopedicsThe Second HospitalCheeloo College of MedicineShandong UniversityJinanShandong250033China
| | - Li‐Bo Jiang
- Department of Orthopaedic SurgeryZhongshan HospitalFudan UniversityShanghai200032China
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Zhang Y, Xu T, Xie J, Wu H, Hu W, Yuan X. MSC-derived mitochondria promote axonal regeneration via Atf3 gene up-regulation by ROS induced DNA double strand breaks at transcription initiation region. Cell Commun Signal 2024; 22:240. [PMID: 38664711 PMCID: PMC11046838 DOI: 10.1186/s12964-024-01617-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Accepted: 04/16/2024] [Indexed: 04/28/2024] Open
Abstract
BACKGROUND The repair of peripheral nerve injury poses a clinical challenge, necessitating further investigation into novel therapeutic approaches. In recent years, bone marrow mesenchymal stromal cell (MSC)-derived mitochondrial transfer has emerged as a promising therapy for cellular injury, with reported applications in central nerve injury. However, its potential therapeutic effect on peripheral nerve injury remains unclear. METHODS We established a mouse sciatic nerve crush injury model. Mitochondria extracted from MSCs were intraneurally injected into the injured sciatic nerves. Axonal regeneration was observed through whole-mount nerve imaging. The dorsal root ganglions (DRGs) corresponding to the injured nerve were harvested to test the gene expression, reactive oxygen species (ROS) levels, as well as the degree and location of DNA double strand breaks (DSBs). RESULTS The in vivo experiments showed that the mitochondrial injection therapy effectively promoted axon regeneration in injured sciatic nerves. Four days after injection of fluorescently labeled mitochondria into the injured nerves, fluorescently labeled mitochondria were detected in the corresponding DRGs. RNA-seq and qPCR results showed that the mitochondrial injection therapy enhanced the expression of Atf3 and other regeneration-associated genes in DRG neurons. Knocking down of Atf3 in DRGs by siRNA could diminish the therapeutic effect of mitochondrial injection. Subsequent experiments showed that mitochondrial injection therapy could increase the levels of ROS and DSBs in injury-associated DRG neurons, with this increase being correlated with Atf3 expression. ChIP and Co-IP experiments revealed an elevation of DSB levels within the transcription initiation region of the Atf3 gene following mitochondrial injection therapy, while also demonstrating a spatial proximity between mitochondria-induced DSBs and CTCF binding sites. CONCLUSION These findings suggest that MSC-derived mitochondria injected into the injured nerves can be retrogradely transferred to DRG neuron somas via axoplasmic transport, and increase the DSBs at the transcription initiation regions of the Atf3 gene through ROS accumulation, which rapidly release the CTCF-mediated topological constraints on chromatin interactions. This process may enhance spatial interactions between the Atf3 promoter and enhancer, ultimately promoting Atf3 expression. The up-regulation of Atf3 induced by mitochondria further promotes the expression of downstream regeneration-associated genes and facilitates axon regeneration.
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Affiliation(s)
- Yingchi Zhang
- Department of Traumatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Jiefang Avenue 1095, Wuhan, Hubei, 430030, People's Republic of China
| | - Tao Xu
- Department of Orthopedics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Jiefang Avenue 1095, Wuhan, Hubei, 430030, People's Republic of China
| | - Jie Xie
- Department of Traumatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Jiefang Avenue 1095, Wuhan, Hubei, 430030, People's Republic of China
| | - Hua Wu
- Department of Orthopedics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Jiefang Avenue 1095, Wuhan, Hubei, 430030, People's Republic of China
| | - Weihua Hu
- Department of Orthopedics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Jiefang Avenue 1095, Wuhan, Hubei, 430030, People's Republic of China.
| | - Xuefeng Yuan
- Department of Traumatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Jiefang Avenue 1095, Wuhan, Hubei, 430030, People's Republic of China.
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11
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Ramesh PA, Sethuraman S, Subramanian A. Multichannel Conduits with Fascicular Complementation: Significance in Long Segmental Peripheral Nerve Injury. ACS Biomater Sci Eng 2024; 10:2001-2021. [PMID: 38487853 DOI: 10.1021/acsbiomaterials.3c01868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/09/2024]
Abstract
Despite the advances in tissue engineering approaches, reconstruction of long segmental peripheral nerve defects remains unsatisfactory. Although autologous grafts with proper fascicular complementation have shown meaningful functional recovery according to the Medical Research Council Classification (MRCC), the lack of donor nerve for such larger defect sizes (>30 mm) has been a serious clinical issue. Further clinical use of hollow nerve conduits is limited to bridging smaller segmental defects of denuded nerve ends (<30 mm). Recently, bioinspired multichannel nerve guidance conduits (NGCs) gained attention as autograft substitutes as they mimic the fascicular connective tissue microarchitecture in promoting aligned axonal outgrowth with desirable innervation for complete sensory and motor function restoration. This review outlines the hierarchical organization of nerve bundles and their significance in the sensory and motor functions of peripheral nerves. This review also emphasizes the major challenges in addressing the longer nerve defects with the role of fascicular arrangement in the multichannel nerve guidance conduits and the need for fascicular matching to accomplish complete functional restoration, especially in treating long segmental nerve defects. Further, currently available fabrication strategies in developing multichannel nerve conduits and their inconsistency in existing preclinical outcomes captured in this review would seed a new process in designing an ideal larger nerve conduit for peripheral nerve repair.
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Affiliation(s)
- Preethy Amruthavarshini Ramesh
- Tissue Engineering & Additive Manufacturing (TEAM) Lab, Centre for Nanotechnology & Advanced Biomaterials, ABCDE Innovation Centre, School of Chemical & Biotechnology SASTRA Deemed University Thanjavur 613 401, India
| | - Swaminathan Sethuraman
- Tissue Engineering & Additive Manufacturing (TEAM) Lab, Centre for Nanotechnology & Advanced Biomaterials, ABCDE Innovation Centre, School of Chemical & Biotechnology SASTRA Deemed University Thanjavur 613 401, India
| | - Anuradha Subramanian
- Tissue Engineering & Additive Manufacturing (TEAM) Lab, Centre for Nanotechnology & Advanced Biomaterials, ABCDE Innovation Centre, School of Chemical & Biotechnology SASTRA Deemed University Thanjavur 613 401, India
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12
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Chen SH, Lin YW, Tseng WL, Lin WT, Lin SC, Hsueh YY. Ultrahigh frequency transcutaneous electrical nerve stimulation for neuropathic pain alleviation and neuromodulation. Neurotherapeutics 2024; 21:e00336. [PMID: 38368171 PMCID: PMC10943071 DOI: 10.1016/j.neurot.2024.e00336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 02/04/2024] [Accepted: 02/06/2024] [Indexed: 02/19/2024] Open
Abstract
A challenging complication in patients with peripheral compressive neuropathy is neuropathic pain. Excessive neuroinflammation at the injury site worsens neuropathic pain and impairs function. Currently, non-invasive modulation techniques like transcutaneous electrical nerve stimulation (TENS) have shown therapeutic promise with positive results. However, the underlying regulatory molecular mechanism for pain relief remains complex and unexplored. This study aimed to validate the therapeutic effect of ultrahigh frequency (UHF)-TENS in chronic constriction injury of the rat sciatic nerve. Alleviation of mechanical allodynia was achieved through the application of UHF-TENS, lasting for 3 days after one session of therapy and 4 days after two sessions, without causing additional damage to the myelinated axon structure. The entire tissue collection schedule was divided into four time points: nerve exposure surgery, 7 days after nerve ligation, and 1 and 5 days after one session of UHF therapy. Significant reductions in pain-related neuropeptides, MEK, c-Myc, c-FOS, COX2, and substance P, were observed in the injured DRG neurons after UHF therapy. RNA sequencing of differential gene expression in sensory neurons revealed significant downregulation in Cables, Pik3r1, Vps4b, Tlr7, and Ezh2 after UHF therapy, while upregulation was observed in Nfkbie and Cln3. UHF-TENS effectively and safely relieved neuropathic pain without causing further nerve damage. The decreased production of pain-related neuropeptides within the DRG provided the therapeutic benefit. Possible molecular mechanisms behind UHF-TENS may result from the modulation of the NF-κB complex, toll-like receptor-7, and phosphoinositide 3-kinase/Akt signaling pathways. These results suggest the neuromodulatory effects of UHF-TENS in rat sciatic nerve chronic constriction injury, including alleviation of neuropathic pain, amelioration of pain-related neuropeptides, and regulation of neuroinflammatory gene expression. In combination with the regulation of related neuroinflammatory genes, UHF-TENS could become a new modality for enhancing the treatment of neuropathic pain in the future.
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Affiliation(s)
- Szu-Han Chen
- Division of Plastic and Reconstructive Surgery, Department of Surgery, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Center of Cell Therapy, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan; International Research Center for Wound Repair and Regeneration, National Cheng Kung University, Tainan, Taiwan; Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Yu-Wen Lin
- Division of Plastic and Reconstructive Surgery, Department of Surgery, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Wan-Ling Tseng
- Division of Plastic and Reconstructive Surgery, Department of Surgery, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Division of Plastic and Reconstructive Surgery, Department of Surgery, Tainan Hospital, Ministry of Health and Welfare, Tainan 700, Taiwan
| | - Wei-Tso Lin
- Gimer Medical Co., Ltd, New Taipei City, Taiwan
| | - Sheng-Che Lin
- Division of Plastic Surgery, Department of Surgery, An-Nan Hospital, China Medical University, Tainan, Taiwan
| | - Yuan-Yu Hsueh
- Division of Plastic and Reconstructive Surgery, Department of Surgery, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Center of Cell Therapy, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan; International Research Center for Wound Repair and Regeneration, National Cheng Kung University, Tainan, Taiwan; Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
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Liu B, Alimi OA, Wang Y, Kong Y, Kuss M, Krishnan MA, Hu G, Xiao Y, Dong J, DiMaio DJ, Duan B. Differentiated mesenchymal stem cells-derived exosomes immobilized in decellularized sciatic nerve hydrogels for peripheral nerve repair. J Control Release 2024; 368:24-41. [PMID: 38367864 DOI: 10.1016/j.jconrel.2024.02.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 01/31/2024] [Accepted: 02/12/2024] [Indexed: 02/19/2024]
Abstract
Peripheral nerve injury (PNI) and the limitations of current treatments often result in incomplete sensory and motor function recovery, which significantly impact the patient's quality of life. While exosomes (Exo) derived from stem cells and Schwann cells have shown promise on promoting PNI repair following systemic administration or intraneural injection, achieving effective local and sustained Exo delivery holds promise to treat local PNI and remains challenging. In this study, we developed Exo-loaded decellularized porcine nerve hydrogels (DNH) for PNI repair. We successfully isolated Exo from differentiated human adipose-derived mesenchymal stem cells (hADMSC) with a Schwann cell-like phenotype (denoted as dExo). These dExo were further combined with polyethylenimine (PEI), and DNH to create polyplex hydrogels (dExo-loaded pDNH). At a PEI content of 0.1%, pDNH showed cytocompatibility for hADMSCs and supported neurite outgrowth of dorsal root ganglions. The sustained release of dExos from dExo-loaded pDNH persisted for at least 21 days both in vitro and in vivo. When applied around injured nerves in a mouse sciatic nerve crush injury model, the dExo-loaded pDNH group significantly improved sensory and motor function recovery and enhanced remyelination compared to dExo and pDNH only groups, highlighting the synergistic regenerative effects. Interestingly, we observed a negative correlation between the number of colony-stimulating factor-1 receptor (CSF-1R) positive cells and the extent of PNI regeneration at the 21-day post-surgery stage. Subsequent in vitro experiments demonstrated the potential involvement of the CSF-1/CSF-1R axis in Schwann cells and macrophage interaction, with dExo effectively downregulating CSF-1/CSF-1R signaling.
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Affiliation(s)
- Bo Liu
- Mary & Dick Holland Regenerative Medicine Program and Division of Cardiology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, USA; Division of Cardiology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Olawale A Alimi
- Mary & Dick Holland Regenerative Medicine Program and Division of Cardiology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, USA; Division of Cardiology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Yanfei Wang
- Mary & Dick Holland Regenerative Medicine Program and Division of Cardiology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, USA; Division of Cardiology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA; College of Osteopathic Medicine, Lake Erie College of Osteopathic Medicine, Erie, PA 16509, USA
| | - Yunfan Kong
- Mary & Dick Holland Regenerative Medicine Program and Division of Cardiology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, USA; Division of Cardiology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Mitchell Kuss
- Mary & Dick Holland Regenerative Medicine Program and Division of Cardiology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, USA; Division of Cardiology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Mena Asha Krishnan
- Mary & Dick Holland Regenerative Medicine Program and Division of Cardiology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, USA; Division of Cardiology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Guoku Hu
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Yi Xiao
- Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Jixin Dong
- Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Dominick J DiMaio
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Bin Duan
- Mary & Dick Holland Regenerative Medicine Program and Division of Cardiology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, USA; Division of Cardiology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA; Department of Mechanical and Materials Engineering, University of Nebraska-Lincoln, Lincoln, NE 68588, USA.
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Soluki M, Mahmoudi F, Abdolmaleki A, Asadi A, Sabahi Namini A. Cerium oxide nanoparticles as a new neuroprotective agent to promote functional recovery in a rat model of sciatic nerve crush injury. Br J Neurosurg 2024; 38:301-306. [PMID: 33356586 DOI: 10.1080/02688697.2020.1864292] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 12/10/2020] [Indexed: 10/22/2022]
Abstract
BACKGROUND Peripheral nerve injury is a common clinical disorder. The aim of the present study was to investigate the role of cerium oxide nanoparticles on axonal regeneration and functional recovery of the sciatic nerve after a crush injury in the rat model. METHOD A total of 40 adult male Wistar rats were divided into four groups. The animals underwent deep anesthesia. Afterward, the right sciatic nerve of rats was exposed and crushed. In two experimental groups, rats were treated intraperitoneally with cerium oxide nanoparticles at the dosage of 20 or 80 mg/kg daily for 1 week. The control group was given a vehicle. Then, during the nerve regeneration motor and sensory function recovery tests, histomorphometric evaluations, histological assessment of gastrocnemius muscle, and gastrocnemius muscle wet weights tests were performed. RESULTS Results demonstrated that the rate of nerve regeneration increased with the administration of cerium oxide nanoparticle in high doses. Also, the morphometric analysis showed that the number of myelinated fibers and myelin sheath thicknesses was significantly greater in the cerium oxide nanoparticle group versus the control group. Other parameters also improved in the cerium oxide nanoparticle treatment groups compared with the control group. CONCLUSION These data indicate that this nanoparticle has therapeutic potential and can be considered as a new treatment for nervous system regeneration.
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Affiliation(s)
- Milad Soluki
- Department of Biology, Faculty of Science, University of Mohaghegh Ardabili, Ardabil, Iran
| | - Fariba Mahmoudi
- Department of Biology, Faculty of Science, University of Mohaghegh Ardabili, Ardabil, Iran
| | - Arash Abdolmaleki
- Department of Engineering Sciences, Faculty of Advanced Technologies, University of Mohaghegh Ardabili, Namin, Iran
- Bio Science and Biotechnology Research center (BBRC), Sabalan University of Advanced Technologies (SUAT), Namin, Iran
| | - Asadollah Asadi
- Department of Biology, Faculty of Science, University of Mohaghegh Ardabili, Ardabil, Iran
| | - Abbas Sabahi Namini
- Department of Engineering Sciences, Faculty of Advanced Technologies, University of Mohaghegh Ardabili, Namin, Iran
- Bio Science and Biotechnology Research center (BBRC), Sabalan University of Advanced Technologies (SUAT), Namin, Iran
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Ko PY, Hsu CC, Chen SY, Li CL, Jou IM, Wu PT. The Pulsed Nd:YAG Laser Therapy Enhanced Nerve Regeneration via Apoptosis Inhibition in a Rat Crushed Sciatic Nerve Model. Neurochem Res 2024; 49:949-958. [PMID: 38157112 DOI: 10.1007/s11064-023-04068-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Revised: 08/28/2023] [Accepted: 11/14/2023] [Indexed: 01/03/2024]
Abstract
The study was aimed to validate the efficacy of the pulsed Nd:YAG laser on nerve regeneration in a rat sciatic nerve crushed model. 54 Wistar rats were randomly assigned into three groups: shame control, crush control, and laser treated group. For the laser treated group, the pulsed Nd:YAG laser (10 Hz) with 350 mJ per pulse in energy density and 50 J/cm2 in fluence was applied extracorporeally at the lesion site for 12 min to daily deliver 500 J immediately and consecutive 9 days following the crush injury. At week 1, the apoptosis-related activities in the injured nerve were examined (n = 8/each group). The sciatic functional index (SFI) was measured preoperatively and weekly until 4 weeks after the index procedure. The injured nerve and the innervated gastrocnemius muscle histology were assessed at week 4 (n = 10/each group). At week 1, the laser group showed the significant less TUNEL-positive ratio (P < 0.05), and the lower expression of cleaved caspase3/procaspase-3 and beclin-2/beclin-2-associated protein X ratios compared with the crush control. Furthermore, the laser group revealed significantly better SFI since week 1 and throughout the study (P < 0.05, all) compared with the crush control. At week 4, the laser group showed significantly higher axon density, lower myelin g-ratio, and the corresponding higher glycogen expression (P < 0.05, all) in the gastrocnemius muscle compared with those in the crush control. The pulsed Nd:YAG might enhance the injured nerve regeneration via apoptosis inhibition.
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Affiliation(s)
- Po-Yen Ko
- Department of Orthopedics, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, 1 University Road, East District, Tainan, 701, Taiwan
| | - Che-Chia Hsu
- Department of Orthopedics, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, 1 University Road, East District, Tainan, 701, Taiwan
| | - Shih-Yao Chen
- Department of Nursing, College of Nursing, Chung Hwa University of Medical Technology, Tainan, Taiwan
| | - Chia-Lung Li
- Department of Orthopedics, Tainan Hospital, Ministry of Health and Welfare, Tainan, Taiwan
| | - I-Ming Jou
- Department of Orthopedics, E-Da Hospital, Kaohsiung, Taiwan
- School of Medicine, College of Medicine, I-Shou University, Kaohsiung, Taiwan
- GEG Orthopedic Clinic, Tainan, Taiwan
| | - Po-Ting Wu
- Department of Orthopedics, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, 1 University Road, East District, Tainan, 701, Taiwan.
- Department of Orthopedics, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
- Department of Biomedical Engineering, National Cheng Kung University, Tainan, Taiwan.
- Department of Biochemistry and Molecular Biology, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
- Medical Device Innovation Center, National Cheng Kung University, Tainan, 70101, Taiwan.
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Zhou X, Tang A, Xiong C, Zhang G, Huang L, Xu F. Oriented Graphene Oxide Scaffold Promotes Nerve Regeneration in vitro and in vivo. Int J Nanomedicine 2024; 19:2573-2589. [PMID: 38505172 PMCID: PMC10949378 DOI: 10.2147/ijn.s439656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 02/14/2024] [Indexed: 03/21/2024] Open
Abstract
Background Treating peripheral nerve injuries (PNI) with defects remains challenging in clinical practice. The commercial conduits have shown suboptimal nerve regeneration and functional recovery due to their basic tubular design without electroactive and oriented topographical cues. Purpose To develop a new scaffold with oriented microstructure and electroactive Graphene oxide (GO) and investigate its' therapeutic effect on nerve regeneration in vitro and in vivo. Methods This study employed a straightforward approach to co-spin PCL and GO, yielding an oriented hybrid nanofibrous scaffold known as the O-GO/PCL scaffold. The physical and chemical properties of nanofibrous scaffold were tested by scanning electron microscopy (SEM), transmission electron microscope (TEM), tensile test and so on. Primary Schwann cells (SCs) and dorsal root ganglia (DRG) were used to investigate the impact of the newly developed scaffolds on the biological behavior of neural cells in vitro. Transcriptome sequencing (mRNA-seq) was employed to probe the underlying mechanisms of the synergistic effect of electroactive GO and longitudinal topographic guidance on nerve regeneration. Furthermore, the developed O-GO/PCL scaffold was utilized to bridge a 10-mm sciatic nerve defect in rat, aiming to investigate its therapeutic potential for peripheral nerve regeneration in vivo. Results and discussion The SEM and TEM revealed that the newly developed O-GO/PCL scaffold showed longitudinally oriented microstructure and GO particles were homogenously and uniformly distributed inside the nanofibers. Primary SCs were utilized to assess the biocompatibility of the GO-based scaffold, revealing that negligible cytotoxicity when GO concentration does not exceed 0.5%. In vitro analysis of nerve regeneration demonstrated that axons in the O-GO/PCL group exhibited an average length of 1054.88 ± 161.32 µm, significant longer than those in the other groups (P < 0.05). Moreover, mRNA sequencing results suggested that the O-GO/PCL scaffold could enhance nerve regeneration by upregulating genes associated with neural regeneration, encompassing ion transport, axon guidance and cell-cell interactions. Most importantly, we employed the O-GO/PCL scaffold to repair a 10-mm sciatic nerve defect in rat, resulting in augmented nerve regeneration, myelination, and functional recovery. Conclusion The O-GO/PCL scaffold with oriented microstructure and electroactive GO represents a promising heral nerve reconstruction.
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Affiliation(s)
- Xu Zhou
- The First School of Clinical Medicine, Southern Medical University, Guangzhou, 510515, People’s Republic of China
- Department of Orthopaedics, General Hospital of Central Theater Command, Wuhan, 430070, People’s Republic of China
| | - Aolin Tang
- Department of Orthopaedics, General Hospital of Central Theater Command, Wuhan, 430070, People’s Republic of China
- Department of Orthopaedics, Minda Hospital of Hubei Minzu University, Enshi, 445000, People’s Republic of China
| | - Chengjie Xiong
- Department of Orthopaedics, General Hospital of Central Theater Command, Wuhan, 430070, People’s Republic of China
| | - Guoquan Zhang
- Department of Orthopaedics, General Hospital of Central Theater Command, Wuhan, 430070, People’s Republic of China
| | - Liangliang Huang
- The First School of Clinical Medicine, Southern Medical University, Guangzhou, 510515, People’s Republic of China
- Department of Orthopaedics, General Hospital of Central Theater Command, Wuhan, 430070, People’s Republic of China
| | - Feng Xu
- The First School of Clinical Medicine, Southern Medical University, Guangzhou, 510515, People’s Republic of China
- Department of Orthopaedics, General Hospital of Central Theater Command, Wuhan, 430070, People’s Republic of China
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Zhao Y, Liu Y, Lu C, Sun D, Kang S, Wang X, Lu L. Reduced Graphene Oxide Fibers Combined with Electrical Stimulation Promote Peripheral Nerve Regeneration. Int J Nanomedicine 2024; 19:2341-2357. [PMID: 38469057 PMCID: PMC10926921 DOI: 10.2147/ijn.s449160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 02/29/2024] [Indexed: 03/13/2024] Open
Abstract
Background The treatment of long-gap peripheral nerve injury (PNI) is still a substantial clinical problem. Graphene-based scaffolds possess extracellular matrix (ECM) characteristic and can conduct electrical signals, therefore have been investigated for repairing PNI. Combined with electrical stimulation (ES), a well performance should be expected. We aimed to determine the effects of reduced graphene oxide fibers (rGOFs) combined with ES on PNI repair in vivo. Methods rGOFs were prepared by one-step dimensionally confined hydrothermal strategy (DCH). Surface characteristics, chemical compositions, electrical and mechanical properties of the samples were characterized. The biocompatibility of the rGOFs were systematically explored both in vitro and in vivo. Total of 54 Sprague-Dawley (SD) rats were randomized into 6 experimental groups: a silicone conduit (S), S+ES, S+rGOFs-filled conduit (SGC), SGC+ES, nerve autograft, and sham groups for a 10-mm sciatic defect. Functional and histological recovery of the regenerated sciatic nerve at 12 weeks after surgery in each group of SD rats were evaluated. Results rGOFs exhibited aligned micro- and nano-channels with excellent mechanical and electrical properties. They are biocompatible in vitro and in vivo. All 6 groups exhibited PNI repair outcomes in view of neurological and morphological recovery. The SGC+ES group achieved similar therapeutic effects as nerve autograft group (P > 0.05), significantly outperformed other treatment groups. Immunohistochemical analysis showed that the expression of proteins related to axonal regeneration and angiogenesis were relatively higher in the SGC+ES. Conclusion The rGOFs had good biocompatibility combined with excellent electrical and mechanical properties. Combined with ES, the rGOFs provided superior motor nerve recovery for a 10-mm nerve gap in a murine acute transection injury model, indicating its excellent repairing ability. That the similar therapeutic effects as autologous nerve transplantation make us believe this method is a promising way to treat peripheral nerve defects, which is expected to guide clinical practice in the future.
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Affiliation(s)
- Yuanyuan Zhao
- Department of Hand and Podiatric Surgery, Orthopedics Center, The First Hospital of Jilin University, Changchun, Jilin, People’s Republic of China
| | - Yang Liu
- Department of Hand and Podiatric Surgery, Orthopedics Center, The First Hospital of Jilin University, Changchun, Jilin, People’s Republic of China
| | - Cheng Lu
- Department of Hand and Podiatric Surgery, Orthopedics Center, The First Hospital of Jilin University, Changchun, Jilin, People’s Republic of China
| | - Daokuan Sun
- School of Materials Science and Engineering, Jilin University, Changchun, Jilin, People’s Republic of China
| | - Shiqi Kang
- Department of Hand and Podiatric Surgery, Orthopedics Center, The First Hospital of Jilin University, Changchun, Jilin, People’s Republic of China
| | - Xin Wang
- School of Materials Science and Engineering, Jilin University, Changchun, Jilin, People’s Republic of China
| | - Laijin Lu
- Department of Hand and Podiatric Surgery, Orthopedics Center, The First Hospital of Jilin University, Changchun, Jilin, People’s Republic of China
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Huang C, Zheng Y, Ji R, Qiao L, Zhang X, Lin H, Liu F, Xu J, Li Y, Zhang Z, Yang X. GPNMB promotes peripheral nerve regeneration by activating the Erk1/2 and Akt pathways via binding Na +/K +-ATPase α1 in Schwann cells. Exp Neurol 2024; 373:114687. [PMID: 38199512 DOI: 10.1016/j.expneurol.2024.114687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 12/24/2023] [Accepted: 01/06/2024] [Indexed: 01/12/2024]
Abstract
Glycoprotein non-metastatic melanoma protein B (GPNMB) is ubiquitously expressed and has protective effects on the central nervous system. In particular, it is also expressed in the peripheral nervous system (PNS) and upregulated after peripheral nerve injury. However, the role and underlying mechanism of GPNMB in the PNS, especially in peripheral nerve regeneration (PNR), are still unknown and need to be further investigated. In this study, recombinant human GPNMB (rhGPNMB) was injected into a sciatic nerve injury model. It was found that rhGPNMB facilitated the regeneration and functional recovery of the injured sciatic nerve in vivo. Moreover, it was also confirmed that GPNMB activated the Erk1/2 and Akt pathways via binding with Na+/K + -ATPase α1 (NKA α1) and promoted the proliferation and migration of Schwann cells (SCs) and their expression and secretion of neurotrophic factors and neural adhesion molecules in vitro. Our findings demonstrate that GPNMB facilitates PNR through activation of the Erk1/2 and Akt pathways in SCs by binding with NKA α1 and may be a novel strategy for PNR.
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Affiliation(s)
- Chao Huang
- Department of Anatomy, Naval Medical University, #800 Xiangyin Road, Shanghai 200433, China
| | - Yani Zheng
- Department of Anatomy, Naval Medical University, #800 Xiangyin Road, Shanghai 200433, China
| | - Ruijuan Ji
- Department of Anatomy, Naval Medical University, #800 Xiangyin Road, Shanghai 200433, China
| | - Liang Qiao
- Department of Anatomy, Naval Medical University, #800 Xiangyin Road, Shanghai 200433, China
| | - Xi Zhang
- Department of Anatomy, Naval Medical University, #800 Xiangyin Road, Shanghai 200433, China
| | - Haiyan Lin
- Department of Anatomy, Naval Medical University, #800 Xiangyin Road, Shanghai 200433, China
| | - Fang Liu
- Department of Anatomy, Naval Medical University, #800 Xiangyin Road, Shanghai 200433, China
| | - Jiajun Xu
- Department of Anatomy, Naval Medical University, #800 Xiangyin Road, Shanghai 200433, China
| | - Yuquan Li
- Department of Anatomy, Naval Medical University, #800 Xiangyin Road, Shanghai 200433, China.
| | - Zhiying Zhang
- Department of Anatomy, Naval Medical University, #800 Xiangyin Road, Shanghai 200433, China.
| | - Xiangqun Yang
- Department of Anatomy, Naval Medical University, #800 Xiangyin Road, Shanghai 200433, China.
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19
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Arbash M, Alzobi OZ, Salameh M, Alkhayarin M, Ahmed G. Incidence, risk factors, and prognosis of sciatic nerve injury in acetabular fractures: a retrospective cross-sectional study. Int Orthop 2024; 48:849-856. [PMID: 38195944 PMCID: PMC10902080 DOI: 10.1007/s00264-024-06087-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Accepted: 01/02/2024] [Indexed: 01/11/2024]
Abstract
PURPOSE This study aimed to investigate the incidence, risk factors of the sciatic nerve injury in patients with acetabulum fractures and assess its prognosis. METHODS A retrospective cross-sectional review was conducted on 273 patients with acetabulum fractures who were treated between January 1st, 2017, and December 30th, 2019. The medical records and radiographs of these patients were analyzed. RESULTS The overall nerve injury rate was 7.7% (21 of 273 cases), with 3.1% (8 of 273 cases) occurring because of the initial injury and 12.8% (13 of 101 cases) as post-operative complications. Among those with nerve injuries, 95.2% (20 of 21 cases) were males and the average age of the patients was 31.5 (SD 9.5) years. The most common mechanism of injury was motor vehicle collisions with 55.7% (152 of 273 cases), and the most common fracture pattern associated with nerve injury was posterior column and posterior wall fracture with 31.6% (6 of 21 cases). Hip dislocation was found in 16.5% (14 of 21 cases) of patients with nerve injury. The Kocher Langenbeck approach was the most common approach used for patients with post-operative nerve injury, and the prone position was significantly associated with sciatic nerve injury during the operation. Of all patients with nerve injury, 52% (11 of 21 cases) had fully recovered, 29% (6 of 21 cases) had partially recovered, and 19% (4 of 21 cases) had no improvement. The average follow-up was 15 months. CONCLUSION This study emphasizes the incidence of sciatic nerve injuries in individuals with acetabulum fractures and highlights key risk factors, including hip dislocation, posterior column, and posterior wall fractures. It is noteworthy that the Kocher Langenbeck approach and the prone position may contribute to iatrogenic nerve injuries. Encouragingly, over half of the patients who suffered nerve injuries achieved full recovery, while nearly one-third experienced partial recovery. These findings underscore the vital significance of recognizing and addressing these risk factors in clinical practice.
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Affiliation(s)
- Mahmood Arbash
- Department of Orthopedic Surgery, Surgical Specialty Center, Hamad Medical Corporation, Doha, Qatar
| | - Osama Z Alzobi
- Department of Orthopedic Surgery, Surgical Specialty Center, Hamad Medical Corporation, Doha, Qatar
| | - Motasem Salameh
- Orthopaedics and Rehabilitation Department, Yale University School of Medicine, New Haven, CT, USA
| | - Mohd Alkhayarin
- Department of Orthopedic Surgery, Surgical Specialty Center, Hamad Medical Corporation, Doha, Qatar
| | - Ghalib Ahmed
- Department of Orthopedic Surgery, Surgical Specialty Center, Hamad Medical Corporation, Doha, Qatar.
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20
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Delibaş B, Vianney JM, Kaplan S. The assessment of neuronal plasticity following sciatic nerve injuries in rats using electron microscopy and stereological methods. J Chem Neuroanat 2024; 136:102396. [PMID: 38331230 DOI: 10.1016/j.jchemneu.2024.102396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 02/01/2024] [Accepted: 02/04/2024] [Indexed: 02/10/2024]
Abstract
The transmission of signals to the cell body from injured axons induces significant alterations in primary sensory neurons located in the ganglion tissue, the site of the perikaryon of the affected nerve fibers. Disruption of the continuity between the proximal and distal ends leads to substantial adaptability in ganglion cells and induces macrophage-like activity in the satellite cells. Research findings have demonstrated the plasticity of satellite cells following injury. Satellite cells work together with sensory neurons to extend the interconnected surface area in order to permit effective communication. The dynamic cellular environment within the ganglion undergoes several alterations that ultimately lead to differentiation, transformation, or cell death. In addition to necrotic and apoptotic cell morphology, phenomena such as histomorphometric alterations, including the development of autophagic vacuoles, chromatolysis, cytosolic degeneration, and other changes, are frequently observed in cells following injury. The use of electron microscopic and stereological techniques for assessing ganglia and nerve fibers is considered a gold standard in terms of investigating neuropathic pain models, regenerative therapies, some treatment methods, and quantifying the outcomes of pharmacological and bioengineering interventions. Stereological techniques provide observer-independent and reliable results, which are particularly useful in the quantitative assessment of three-dimensional structures from two-dimensional images. Employing the fractionator and disector techniques within stereological methodologies yields unbiased data when assessing parameters such as number. The fundamental concept underlying these methodologies involves ensuring that each part of the structure under evaluation has an equal opportunity of being sampled. This review describes the stereological and histomorphometric evaluation of dorsal root ganglion neurons and satellite cells following nerve injury models.
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Affiliation(s)
- Burcu Delibaş
- Department of Histology and Embryology, Faculty of Medicine, Recep Tayyip Erdoğan University, Rize, Turkiye
| | - John-Mary Vianney
- School of Life Science and Bioengineering, Nelson Mandela-African Institution of Science and Technology, Arusha, Tanzania
| | - Süleyman Kaplan
- School of Life Science and Bioengineering, Nelson Mandela-African Institution of Science and Technology, Arusha, Tanzania; Department of Histology and Embryology, Faculty of Medicine, Ondokuz Mayıs University, Samsun, Turkiye.
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21
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Aktaş A, Yiğit F, Delibaş B, Kaplan AA, Hamour HM, Marangoz AH, Kaya A, Altun G, Kaplan S. The effects of Garcinia kola and curcumin on the dorsal root ganglion of the diabetic rat after peripheral nerve transection injury. J Chem Neuroanat 2024; 136:102395. [PMID: 38320670 DOI: 10.1016/j.jchemneu.2024.102395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 02/01/2024] [Accepted: 02/01/2024] [Indexed: 02/08/2024]
Abstract
OBJECTIVE To test the protective effects of Garcinia kola and curcumin on the ganglion tissues of diabetic rats following the use of autologous vein graft in peripheral nerve transection injury. METHODS The sciatic nerve on the right side was transected, and anastomosis was performed between the proximal and distal ends using an autologous vein graft. Curcumin and Garcinia kola seed extract were administered daily by oral gavage. The ganglion tissues were harvested after a 90-day waiting period. Sensory neurons in the dorsal root ganglion at the L4 and L5 levels were used for stereological evaluations. Mean sensory neuron numbers were analyzed using a stereological technique. The size of the light and dark neurons was also estimated, and ultrastructural and immunohistochemical evaluations were performed. RESULTS A statistically significant difference in sensory neuron numbers was observed between the groups with and without Garcinia kola and curcumin applications. The immunohistochemical results showed that the s-100 protein is expressed selectively between cell types. CONCLUSION The results of this study show that curcumin and Garicinia kola prevented sensory neuron loss in diabetic rats following transection injury to the sciatic nerve.
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Affiliation(s)
- Abit Aktaş
- Department of Histology and Embryology, Faculty of Veterinary Medicine, Istanbul University - Cerrahpaşa, Istanbul, Turkey
| | - Funda Yiğit
- Department of Histology and Embryology, Faculty of Veterinary Medicine, Istanbul University - Cerrahpaşa, Istanbul, Turkey
| | - Burcu Delibaş
- Department of Histology and Embryology, Faculty of Medicine, Recep Tayyip Erdoğan University, Rize, Turkey
| | - Arife Ahsen Kaplan
- Department of Histology and Embryology, Faculty of Medicine, Istanbul Medipol University, Istanbul, Turkey
| | - Hala Mahgoub Hamour
- Department of Histology and Embryology, Faculty of Medicine, Ondokuz Mayıs University, Samsun, Turkey
| | | | - Ayşenur Kaya
- Department of Histology and Embryology, Faculty of Medicine, Ondokuz Mayıs University, Samsun, Turkey; Department of Histology and Embryology, Faculty of Medicine, Karamanoğlu Mehmetbey University, Karaman, Turkey
| | - Gamze Altun
- Department of Histology and Embryology, Faculty of Medicine, Ondokuz Mayıs University, Samsun, Turkey
| | - Süleyman Kaplan
- Department of Histology and Embryology, Faculty of Medicine, Ondokuz Mayıs University, Samsun, Turkey; Nelson Mandela African Institution of Science and Technology, Arusha, Tanzania.
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22
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Demyanenko SV, Kalyuzhnaya YN, Bachurin SS, Khaitin AM, Kunitsyna AE, Batalshchikova SA, Evgen'ev MB, Garbuz DG. Exogenous Hsp70 exerts neuroprotective effects in peripheral nerve rupture model. Exp Neurol 2024; 373:114670. [PMID: 38158007 DOI: 10.1016/j.expneurol.2023.114670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 12/08/2023] [Accepted: 12/23/2023] [Indexed: 01/03/2024]
Abstract
Hsp70 is the main molecular chaperone responsible for cellular proteostasis under normal conditions and for restoring the conformation or utilization of proteins damaged by stress. Increased expression of endogenous Hsp70 or administration of exogenous Hsp70 is known to exert neuroprotective effects in models of many neurodegenerative diseases. In this study, we have investigated the effect of exogenous Hsp70 on recovery from peripheral nerve injury in a model of sciatic nerve transection in rats. It was shown that recombinant Hsp70 after being added to the conduit connecting the ends of the nerve at the site of its extended severance, migrates along the nerve into the spinal ganglion and is retained there at least three days. In animals with the addition of recombinant Hsp70 to the conduit, a decrease in apoptosis in the spinal ganglion cells after nerve rupture, an increase in the level of PTEN-induced kinase 1 (PINK1), an increase in markers of nerve tissue regeneration and a decrease in functional deficit were observed compared to control animals. The obtained data indicate the possibility of using recombinant Hsp70 preparations to accelerate the recovery of patients after neurotrauma.
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Affiliation(s)
- Svetlana V Demyanenko
- Laboratory «Molecular Neurobiology», Academy of Biology and Biotechnology, Southern Federal University, 344090 Rostov-on-Don, Russia; Department of General and Clinical Biochemistry no. 2, Rostov State Medical University, Rostov-on-Don, Russia
| | - Yuliya N Kalyuzhnaya
- Laboratory «Molecular Neurobiology», Academy of Biology and Biotechnology, Southern Federal University, 344090 Rostov-on-Don, Russia
| | - Stanislav S Bachurin
- Department of General and Clinical Biochemistry no. 2, Rostov State Medical University, Rostov-on-Don, Russia
| | - Andrey M Khaitin
- Laboratory «Molecular Neurobiology», Academy of Biology and Biotechnology, Southern Federal University, 344090 Rostov-on-Don, Russia
| | - Anastasia E Kunitsyna
- Laboratory «Molecular Neurobiology», Academy of Biology and Biotechnology, Southern Federal University, 344090 Rostov-on-Don, Russia
| | - Svetlana A Batalshchikova
- Laboratory «Molecular Neurobiology», Academy of Biology and Biotechnology, Southern Federal University, 344090 Rostov-on-Don, Russia
| | - Michael B Evgen'ev
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia
| | - David G Garbuz
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia.
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23
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Iwahashi T, Suzuki K, Tanaka H, Matsuoka H, Nishimoto S, Hirai Y, Kasuya T, Shimada T, Yoshimura Y, Oka K, Murase T, Okada S. Neurotropin® accelerates peripheral nerve regeneration in a rat sciatic nerve crush injury model. J Orthop Sci 2024; 29:653-659. [PMID: 36858838 DOI: 10.1016/j.jos.2023.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 02/05/2023] [Accepted: 02/06/2023] [Indexed: 03/03/2023]
Abstract
BACKGROUND Peripheral nerve injuries are common and serious conditions. The effect of Neurotropin® (NTP), a nonprotein extract derived from the inflamed skin of rabbits inoculated with vaccinia virus, on peripheral nerve regeneration has not been fully elucidated. However, it has analgesic properties via the activation of descending pain inhibitory systems. Therefore, the current study aimed to determine the effects of NTP on peripheral nerve regeneration. METHODS We examined axonal outgrowth of dorsal root ganglion (DRG) neurons using immunocytochemistry in vitro. In addition, nerve regeneration was evaluated functionally, electrophysiologically, and histologically in a rat sciatic nerve crush injury model in vivo. Furthermore, gene expression of neurotrophic factors in the injured sciatic nerves and DRGs was evaluated. RESULTS In the dorsal root ganglion neurons in vitro, NTP promoted axonal outgrowth at a concentration of 10 mNU/mL. Moreover, the systemic administration of NTP contributed to the recovery of motor and sensory function at 2 weeks, and of sensory function, nerve conduction velocity, terminal latency, and axon-remyelination 4 weeks after sciatic nerve injury. In the gene expression assessment, insulin-like growth factor 1 and vascular endothelial growth factor expressions were increased in the injured sciatic nerve 2 days postoperatively. CONCLUSIONS Therefore, NTP might be effective in not only treating chronic pain but also promoting peripheral nerve regeneration after injury.
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Affiliation(s)
- Toru Iwahashi
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan
| | - Koji Suzuki
- Department of Orthopaedic Surgery, Kansai Rosai Hospital, Hyogo, 660-8511, Japan
| | - Hiroyuki Tanaka
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan; Department of Sports Medical Science, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan.
| | - Hozo Matsuoka
- Department of Orthopaedic Surgery, Itami City Hospital, Hyogo, 664-8540, Japan
| | - Shunsuke Nishimoto
- Department of Orthopaedic Surgery, Kansai Rosai Hospital, Hyogo, 660-8511, Japan
| | - Yukio Hirai
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan
| | - Taisuke Kasuya
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan
| | - Toshiki Shimada
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan
| | - Yoshiaki Yoshimura
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan
| | - Kunihiro Oka
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan
| | - Tsuyoshi Murase
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan
| | - Seiji Okada
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan
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24
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Wang X, Hu S, Ouyang S, Pan X, Fu Y, Chen X, Wu S. TsMS combined with EA promotes functional recovery and axonal regeneration via mediating the miR-539-5p/Sema3A/PlexinA1 signalling axis in sciatic nerve-injured rats. Neurosci Lett 2024; 824:137691. [PMID: 38373630 DOI: 10.1016/j.neulet.2024.137691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 02/10/2024] [Accepted: 02/16/2024] [Indexed: 02/21/2024]
Abstract
Enhancing axonal regeneration is one of the most important processes in treating nerve injuries. Both magnetic and electrical stimulation have the effect of promoting nerve axon regeneration. But few study has investigated the effects of trans-spinal magnetic stimulation (TsMS) combined with electroacupuncture (EA) on nerve regeneration in rats with sciatic nerve injury. In this study, we compared the improvement of neurological function in rats with sciatic nerve crush injuries after 4 weeks of different interventions (EA, TsMS, or TsMS combined with EA). We further explored the morphological and molecular biological alterations following sciatic nerve injury by HE, Masson, RT-PCR, western blotting, immunofluorescence staining and small RNA transcriptome sequencing. The results showed that TsMS combined with EA treatment significantly promoted axonal regeneration, increased the survival rate of neurons, and suppressed denervation atrophy of the gastrocnemius muscle. Subsequent experiments suggested that the combination treatment may play an active role by mediating the miR-539-5p/Sema3A/PlexinA1 signaling axis.
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Affiliation(s)
- Xianbin Wang
- Affiliated Hospital of Guizhou Medical University, 28 Guiyi Street, Yunyan District, Guiyang, Guizhou, China; Guizhou Medical University, 9 Beijing Street, Yunyan District, Guiyang, Guizhou, China
| | - Shouxing Hu
- Guizhou Medical University, 9 Beijing Street, Yunyan District, Guiyang, Guizhou, China
| | - Shuai Ouyang
- Guizhou Medical University, 9 Beijing Street, Yunyan District, Guiyang, Guizhou, China
| | - Xiao Pan
- Guizhou Medical University, 9 Beijing Street, Yunyan District, Guiyang, Guizhou, China
| | - Yingxue Fu
- Guizhou Medical University, 9 Beijing Street, Yunyan District, Guiyang, Guizhou, China
| | - Xingyu Chen
- Guizhou Medical University, 9 Beijing Street, Yunyan District, Guiyang, Guizhou, China
| | - Shuang Wu
- Affiliated Hospital of Guizhou Medical University, 28 Guiyi Street, Yunyan District, Guiyang, Guizhou, China; Guizhou Medical University, 9 Beijing Street, Yunyan District, Guiyang, Guizhou, China.
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25
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Wang J, Chen P, Han G, Zhou Y, Xiang X, Bian M, Huang L, Wang X, He B, Lu S. Rab32 facilitates Schwann cell pyroptosis in rats following peripheral nerve injury by elevating ROS levels. J Transl Med 2024; 22:194. [PMID: 38388913 PMCID: PMC10885539 DOI: 10.1186/s12967-024-04999-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Accepted: 02/13/2024] [Indexed: 02/24/2024] Open
Abstract
BACKGROUND Peripheral nerve injury (PNI) is commonly observed in clinical practice, yet the underlying mechanisms remain unclear. This study investigated the correlation between the expression of a Ras-related protein Rab32 and pyroptosis in rats following PNI, and potential mechanisms have been explored by which Rab32 may influence Schwann cells pyroptosis and ultimately peripheral nerve regeneration (PNR) through the regulation of Reactive oxygen species (ROS) levels. METHODS The authors investigated the induction of Schwann cell pyroptosis and the elevated expression of Rab32 in a rat model of PNI. In vitro experiments revealed an upregulation of Rab32 during Schwann cell pyroptosis. Furthermore, the effect of Rab32 on the level of ROS in mitochondria in pyroptosis model has also been studied. Finally, the effects of knocking down the Rab32 gene on PNR were assessed, morphology, sensory and motor functions of sciatic nerves, electrophysiology and immunohistochemical analysis were conducted to assess the therapeutic efficacy. RESULTS Silencing Rab32 attenuated PNI-induced Schwann cell pyroptosis and promoted peripheral nerve regeneration. Furthermore, our findings demonstrated that Rab32 induces significant oxidative stress by damaging the mitochondria of Schwann cells in the pyroptosis model in vitro. CONCLUSION Rab32 exacerbated Schwann cell pyroptosis in PNI model, leading to delayed peripheral nerve regeneration. Rab32 can be a potential target for future therapeutic strategy in the treatment of peripheral nerve injuries.
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Affiliation(s)
- Jiayi Wang
- Department of Orthopedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Pin Chen
- Department of Neurosurgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Guanjie Han
- Department of Orthopedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yongjie Zhou
- Department of Interventional Radiology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Xingdong Xiang
- Department of Rehabilitation, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Mengxuan Bian
- Department of Orthopedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Lei Huang
- Department of Orthopedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Xiang Wang
- Department of Cardiology, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, 330006, China.
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai, China.
| | - Binfeng He
- Department of Pulmonary and Critical Care Medicine, Zhongshan Hospital, Fudan University, Shanghai, China.
- Department of Genel Practice, Xinqiao Hospital, Third Military Medical University, Chongqing, China.
| | - Shunyi Lu
- Department of Orthopedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China.
- Department of Orthopedic Surgery, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China.
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26
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Shan Y, Xu L, Cui X, Wang E, Jiang F, Li J, Ouyang H, Yin T, Feng H, Luo D, Zhang Y, Li Z. A responsive cascade drug delivery scaffold adapted to the therapeutic time window for peripheral nerve injury repair. Mater Horiz 2024; 11:1032-1045. [PMID: 38073476 DOI: 10.1039/d3mh01511d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/20/2024]
Abstract
Peripheral nerve injury (PNI) is a common clinical challenge, requiring timely and orderly initiation of synergistic anti-inflammatory and reparative therapy. Although the existing cascade drug delivery system can realize sequential drug release through regulation of the chemical structure of drug carriers, it is difficult to adjust the release kinetics of each drug based on the patient's condition. Therefore, there is an urgent need to develop a cascade drug delivery system that can dynamically adjust drug release and realize personalized treatment. Herein, we developed a responsive cascade drug delivery scaffold (RCDDS) which can adapt to the therapeutic time window, in which Vitamin B12 is used in early controllable release to suppress inflammation and nerve growth factor promotes regeneration by cascade loading. The RCDDS exhibited the ability to modulate the drug release kinetics by hierarchically opening polymer chains triggered by ultrasound, enabling real-time adjustment of the anti-inflammatory and neuroregenerative therapeutic time window depending on the patient's status. In the rat sciatic nerve injury model, the RCDDS group was able to achieve neural repair effects comparable to the autograft group in terms of tissue structure and motor function recovery. The development of the RCDDS provides a useful route toward an intelligent cascade drug delivery system for personalized therapy.
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Affiliation(s)
- Yizhu Shan
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China.
- Department of Clinical Laboratory, Renmin Hospital of Wuhan University, Wuhan 430060, China
- School of Nanoscience and Engineering, Chinese Academy of Sciences, Beijing 100049, China
| | - Lingling Xu
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety & CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, Beijing 100190, China
| | - Xi Cui
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China.
- School of Nanoscience and Engineering, Chinese Academy of Sciences, Beijing 100049, China
| | - Engui Wang
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China.
| | - Fengying Jiang
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China.
- Center on Nanoenergy Research, School of Physical Science and Technology, Guangxi University, Nanning 530004, China
| | - Jiaxuan Li
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China.
| | - Han Ouyang
- School of Nanoscience and Engineering, Chinese Academy of Sciences, Beijing 100049, China
| | - Tailang Yin
- Reproductive Medicine Center, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Hongqing Feng
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China.
- School of Nanoscience and Engineering, Chinese Academy of Sciences, Beijing 100049, China
| | - Dan Luo
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China.
- School of Nanoscience and Engineering, Chinese Academy of Sciences, Beijing 100049, China
| | - Yan Zhang
- Department of Clinical Laboratory, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Zhou Li
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China.
- School of Nanoscience and Engineering, Chinese Academy of Sciences, Beijing 100049, China
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27
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Zhong Y, Li S, Chen Y, Tang Y, Xiao X, Nie T. Combining PLGA microspheres loaded with Liver X receptor agonist GW3965 with a chitosan nerve conduit can promote the healing and regeneration of the wounded sciatic nerve. J Biomed Mater Res B Appl Biomater 2024; 112:e35378. [PMID: 38356051 DOI: 10.1002/jbm.b.35378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Accepted: 01/06/2024] [Indexed: 02/16/2024]
Abstract
Globally, peripheral nerve injury (PNI) is a common clinical issue. Successfully repairing severe PNIs has posed a major challenge for clinicians. GW3965 is a highly selective LXR agonist, and previous studies have demonstrated its positive protective effects in both central and peripheral nerve diseases. In this work, we examined the potential reparative effects of GW3965-loaded polylactic acid co-glycolic acid microspheres in conjunction with a chitosan nerve conduit for peripheral nerve damage. The experiment revealed that GW3965 promoted Schwann cell proliferation and neurotrophic factor release in vitro. In vivo experiments conducted on rats showed that GW3965 facilitated the restoration of motor function, promoted axon and myelin regeneration in the sciatic nerve, and enhanced the microenvironment of nerve regeneration. These results offer a novel therapeutic approach for the healing of nerve damage. Overall, this work provides valuable insights and presents a promising therapeutic strategy for addressing PNI.
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Affiliation(s)
- Yuanwu Zhong
- Orthopedic Hospital, The First Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, China
| | - Shiqi Li
- Orthopedic Hospital, The First Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, China
| | - Yanzhen Chen
- Orthopedic Hospital, The First Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, China
| | - Yuan Tang
- Orthopedic Hospital, The First Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, China
| | - Xinmao Xiao
- Orthopedic Hospital, The First Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, China
| | - Tao Nie
- Orthopedic Hospital, The First Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, China
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Delibaş B, Kaplan S. The histomorphological and stereological assessment of rat dorsal root ganglion tissues after various types of sciatic nerve injury. Histochem Cell Biol 2024; 161:145-163. [PMID: 37855874 DOI: 10.1007/s00418-023-02242-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/22/2023] [Indexed: 10/20/2023]
Abstract
Peripheral nerve injuries lead to significant changes in the dorsal root ganglia, where the cell bodies of the damaged axons are located. The sensory neurons and the surrounding satellite cells rearrange the composition of the intracellular organelles to enhance their plasticity for adaptation to changing conditions and response to injury. Meanwhile, satellite cells acquire phagocytic properties and work with macrophages to eliminate degenerated neurons. These structural and functional changes are not identical in all injury types. Understanding the cellular response, which varies according to the type of injury involved, is essential in determining the optimal method of treatment. In this research, we investigated the numerical and morphological changes in primary sensory neurons and satellite cells in the dorsal root ganglion 30 days following chronic compression, crush, and transection injuries using stereology, high-resolution light microscopy, immunohistochemistry, and behavioral analysis techniques. Electron microscopic methods were employed to evaluate fine structural alterations in cells. Stereological evaluations revealed no statistically significant difference in terms of mean sensory neuron numbers (p > 0.05), although a significant decrease was observed in sensory neuron volumes in the transection and crush injury groups (p < 0.05). Active caspase-3 immunopositivity increased in the injury groups compared to the sham group (p < 0.05). While crush injury led to desensitization, chronic compression injury caused thermal hyperalgesia. Macrophage infiltrations were observed in all injury types. Electron microscopic results revealed that the chromatolysis response was triggered in the sensory neuron bodies from the transection injury group. An increase in organelle density was observed in the perikaryon of sensory neurons after crush-type injury. This indicates the presence of a more active regeneration process in crush-type injury than in other types. The effect of chronic compression injury is more devastating than that of crush-type injury, and the edema caused by compression significantly inhibits the regeneration process.
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Affiliation(s)
- Burcu Delibaş
- Faculty of Medicine, Department of Histology and Embryology, Recep Tayyip Erdoğan University, Rize, Türkiye
| | - Suleyman Kaplan
- Faculty of Medicine, Department of Histology and Embryology, Ondokuz Mayıs University, Samsun, Türkiye.
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Broeren BO, Hundepool CA, Kumas AH, Duraku LS, Walbeehm ET, Hooijmans CR, Power DM, Zuidam JM, De Jong T. The effectiveness of acellular nerve allografts compared to autografts in animal models: A systematic review and meta-analysis. PLoS One 2024; 19:e0279324. [PMID: 38295088 PMCID: PMC10829984 DOI: 10.1371/journal.pone.0279324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Accepted: 05/07/2023] [Indexed: 02/02/2024] Open
Abstract
BACKGROUND Treatment of nerve injuries proves to be a worldwide clinical challenge. Acellular nerve allografts are suggested to be a promising alternative for bridging a nerve gap to the current gold standard, an autologous nerve graft. OBJECTIVE To systematically review the efficacy of the acellular nerve allograft, its difference from the gold standard (the nerve autograft) and to discuss its possible indications. MATERIAL AND METHODS PubMed, Embase and Web of Science were systematically searched until the 4th of January 2022. Original peer reviewed paper that presented 1) distinctive data; 2) a clear comparison between not immunologically processed acellular allografts and autologous nerve transfers; 3) was performed in laboratory animals of all species and sex. Meta analyses and subgroup analyses (for graft length and species) were conducted for muscle weight, sciatic function index, ankle angle, nerve conduction velocity, axon count diameter, tetanic contraction and amplitude using a Random effects model. Subgroup analyses were conducted on graft length and species. RESULTS Fifty articles were included in this review and all were included in the meta-analyses. An acellular allograft resulted in a significantly lower muscle weight, sciatic function index, ankle angle, nerve conduction velocity, axon count and smaller diameter, tetanic contraction compared to an autologous nerve graft. No difference was found in amplitude between acellular allografts and autologous nerve transfers. Post hoc subgroup analyses of graft length showed a significant reduced muscle weight in long grafts versus small and medium length grafts. All included studies showed a large variance in methodological design. CONCLUSION Our review shows that the included studies, investigating the use of acellular allografts, showed a large variance in methodological design and are as a consequence difficult to compare. Nevertheless, our results indicate that treating a nerve gap with an allograft results in an inferior nerve recovery compared to an autograft in seven out of eight outcomes assessed in experimental animals. In addition, based on our preliminary post hoc subgroup analyses we suggest that when an allograft is being used an allograft in short and medium (0-1cm, > 1-2cm) nerve gaps is preferred over an allograft in long (> 2cm) nerve gaps.
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Affiliation(s)
- Berend O. Broeren
- Department of Plastic & Reconstructive Surgery, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Caroline A. Hundepool
- Department of Plastic & Reconstructive Surgery, Erasmus MC, Rotterdam, The Netherlands
| | - Ali H. Kumas
- Department of Plastic & Reconstructive Surgery, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Liron S. Duraku
- Department of Plastic, Reconstructive & Hand Surgery, Amsterdam UMC, Amsterdam, The Netherlands
| | - Erik T. Walbeehm
- Department of Plastic, Reconstructive & Hand Surgery, Haga Hospital and Xpert Clinic, Den Haag, The Netherlands
| | - Carlijn R. Hooijmans
- Department for Health Evidence Unit SYRCLE, Radboud University Medical Centre, Nijmegen, The Netherlands
- Department of Anesthesiology, Pain and Palliative Care (Meta Research Team), Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Dominic M. Power
- Department of Hand & Peripheral Nerve Surgery, Queen Elizabeth Hospital, Birmingham, United Kingdom
| | - J. Michiel Zuidam
- Department of Plastic & Reconstructive Surgery, Erasmus MC, Rotterdam, The Netherlands
| | - Tim De Jong
- Department of Plastic & Reconstructive Surgery, Radboud University Medical Centre, Nijmegen, The Netherlands
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Charron A, Pepino L, Malapert P, Debrauwer V, Castets F, Salio C, Moqrich A. Sex-related exacerbation of injury-induced mechanical hypersensitivity in GAD67 haplodeficient mice. Pain 2024; 165:192-201. [PMID: 37578506 PMCID: PMC10723643 DOI: 10.1097/j.pain.0000000000003012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 05/13/2023] [Accepted: 06/05/2023] [Indexed: 08/15/2023]
Abstract
ABSTRACT Decreased GABA levels in injury-induced loss of spinal inhibition are still under intense interest and debate. Here, we show that GAD67 haplodeficient mice exhibited a prolonged injury-induced mechanical hypersensitivity in postoperative, inflammatory, and neuropathic pain models. In line with this, we found that loss of 1 copy of the GAD67-encoding gene Gad1 causes a significant decrease in GABA contents in spinal GABAergic neuronal profiles. Consequently, GAD67 haplodeficient males and females were unresponsive to the analgesic effect of diazepam. Remarkably, all these phenotypes were more pronounced in GAD67 haplodeficient females. These mice had significantly much lower amount of spinal GABA content, exhibited an exacerbated pain phenotype during the second phase of the formalin test, developed a longer lasting mechanical hypersensitivity in the chronic constriction injury of the sciatic nerve model, and were unresponsive to the pain relief effect of the GABA-transaminase inhibitor phenylethylidenehydrazine. Our study provides strong evidence for a role of GABA levels in the modulation of injury-induced mechanical pain and suggests a potential role of the GABAergic system in the prevalence of some painful diseases among females.
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Affiliation(s)
- Aude Charron
- Aix-Marseille-université, CNRS, Institut de Biologie du Développement de Marseille, UMR 7288, Case 907, Marseille, France
| | - Lucie Pepino
- Aix-Marseille-université, CNRS, Institut de Biologie du Développement de Marseille, UMR 7288, Case 907, Marseille, France
| | - Pascale Malapert
- Aix-Marseille-université, CNRS, Institut de Biologie du Développement de Marseille, UMR 7288, Case 907, Marseille, France
| | - Vincent Debrauwer
- Aix-Marseille-université, CNRS, Institut des Sciences Moléculaires de Marseille, UMR 7313, Campus Scientifique de St Jérôme, Marseille, France
| | - Francis Castets
- Aix-Marseille-université, CNRS, Institut de Biologie du Développement de Marseille, UMR 7288, Case 907, Marseille, France
| | - Chiara Salio
- Department of Veterinary Sciences, University of Turin, Grugliasco, Italy
| | - Aziz Moqrich
- Aix-Marseille-université, CNRS, Institut de Biologie du Développement de Marseille, UMR 7288, Case 907, Marseille, France
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31
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Rein S, Schober R, Poetschke J, Kremer T. Non degradation of chitosan and initial degradation of collagen nerve conduits used for protection of nerve coaptations. Microsurgery 2024; 44:e31093. [PMID: 37477338 DOI: 10.1002/micr.31093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 07/03/2023] [Accepted: 07/06/2023] [Indexed: 07/22/2023]
Abstract
BACKGROUND Nerve conduits are either used to bridge nerve gaps of up to 3 cm or to protect nerve coaptations. Biodegradable nerve conduits, which are currently commercially available, include Chitosan or collagen-based ones. As histological aspects of their degradation are highly relevant for the progress of neuronal regeneration, the aim of this study was to report the histopathological signs of such nerve conduits, which were removed during revision surgery. MATERIALS AND METHODS Either Chitosan (n = 2) or collagen (n = 2) nerve conduits were implanted after neuroma resection and nerve grafting (n = 2) or traumatic nerve lesion after cut (n = 1) or crush injury (n = 1) in two females and two men, aged between 17 and 57 years. Revision surgery with removal of the nerve conduits was indicated due to persisting neuropathic pain and sensorimotor deficits, limited joint motion, or neurolysis with hardware removal at a median time of 17 months (range: 5.5-48 months). Histopathological analyses of all removed nerve conduits were performed. RESULTS A scar neuroma was diagnosed in one out of four patients. Mechanical complication occurred in one patient after nerve conduit implantation bridged over finger joints. Intraoperatively no or only initial signs of degradation of the nerve conduits were observed. Chitosan conduits revealed largely unchanged shape and structure of chitosan, and coating of the conduit by a vascularized fibrous membrane. The latter contained deposits taken up by macrophages, most likely representing dissolved chitosan. Characteristic histopathologic features of the degradation of collagen conduits were a disintegration of the compact collagen into separate fine circular strands, No foreign body reaction was observed in all removed nerve conduits. CONCLUSIONS Both Chitosan nerve conduits have not been degraded. The collagen nerve conduits showed a beginning degradation process. Furthermore, wrapping the repaired nerve with a nerve conduit did neither prevent adhesions nor improved nerve gliding. Therefore, biodegradation in time should be particularly addressed in further developments of nerve conduits.
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Affiliation(s)
- Susanne Rein
- Department of Plastic and Handsurgery, Burn Unit, Klinikum St. Georg gGmbH, Leipzig, Germany
- Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
| | - Ralf Schober
- Institute for Pathology and Tumour Diagnostics, Klinikum St. Georg gGmbH, Leipzig, Germany
| | - Julian Poetschke
- Department of Plastic and Handsurgery, Burn Unit, Klinikum St. Georg gGmbH, Leipzig, Germany
| | - Thomas Kremer
- Department of Plastic and Handsurgery, Burn Unit, Klinikum St. Georg gGmbH, Leipzig, Germany
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32
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Fang K, Lu P, Cheng W, Yu B. Kilohertz high-frequency electrical stimulation ameliorate hyperalgesia by modulating transient receptor potential vanilloid-1 and N-methyl-D-aspartate receptor-2B signaling pathways in chronic constriction injury of sciatic nerve mice. Mol Pain 2024; 20:17448069231225810. [PMID: 38148592 PMCID: PMC10851768 DOI: 10.1177/17448069231225810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Revised: 11/30/2023] [Accepted: 12/12/2023] [Indexed: 12/28/2023] Open
Abstract
The number of patients with neuropathic pain is increasing in recent years, but drug treatments for neuropathic pain have a low success rate and often come with significant side effects. Consequently, the development of innovative therapeutic strategies has become an urgent necessity. Kilohertz High Frequency Electrical Stimulation (KHES) offers pain relief without inducing paresthesia. However, the specific therapeutic effects of KHES on neuropathic pain and its underlying mechanisms remain ambiguous, warranting further investigation. In our previous study, we utilized the Gene Expression Omnibus (GEO) database to identify datasets related to neuropathic pain mice. The majority of the identified pathways were found to be associated with inflammatory responses. From these pathways, we selected the transient receptor potential vanilloid-1 (TRPV1) and N-methyl-D-aspartate receptor-2B (NMDAR2B) pathway for further exploration. Mice were randomly divided into four groups: a Sham group, a Sham/KHES group, a chronic constriction injury of the sciatic nerve (CCI) group, and a CCI/KHES stimulation group. KHES administered 30 min every day for 1 week. We evaluated the paw withdrawal threshold (PWT) and thermal withdrawal latency (TWL). The expression of TRPV1 and NMDAR2B in the spinal cord were analyzed using quantitative reverse-transcriptase polymerase chain reaction, Western blot, and immunofluorescence assay. KHES significantly alleviated the mechanical and thermal allodynia in neuropathic pain mice. KHES effectively suppressed the expression of TRPV1 and NMDAR2B, consequently inhibiting the activation of glial fibrillary acidic protein (GFAP) and ionized calcium binding adapter molecule 1 (IBA1) in the spinal cord. The administration of the TRPV1 pathway activator partially reversed the antinociceptive effects of KHES, while the TRPV1 pathway inhibitor achieved analgesic effects similar to KHES. KHES inhibited the activation of spinal dorsal horn glial cells, especially astrocytes and microglia, by inhibiting the activation of the TRPV1/NMDAR2B signaling pathway, ultimately alleviating neuropathic pain.
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Affiliation(s)
- Kexin Fang
- Department of Anesthesia and Pain Rehabilitation, Yangzhi Affiliated Rehabilitation Hospital of Tongji University, Shanghai, China
- Tongji University School of Medicine, Shanghai, China
| | - Peixin Lu
- Department of Anesthesia and Pain Rehabilitation, Yangzhi Affiliated Rehabilitation Hospital of Tongji University, Shanghai, China
- Tongji University School of Medicine, Shanghai, China
| | - Wen Cheng
- Department of Anesthesia and Pain Rehabilitation, Yangzhi Affiliated Rehabilitation Hospital of Tongji University, Shanghai, China
- Tongji University School of Medicine, Shanghai, China
| | - Bin Yu
- Department of Anesthesia and Pain Rehabilitation, Yangzhi Affiliated Rehabilitation Hospital of Tongji University, Shanghai, China
- Tongji University School of Medicine, Shanghai, China
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33
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Liu Y, Xu YJ. LKB1 and CRMP1 cooperatively promote the repair of the sciatic nerve injury. Dev Neurobiol 2024; 84:18-31. [PMID: 38105470 DOI: 10.1002/dneu.22932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Revised: 09/11/2023] [Accepted: 12/05/2023] [Indexed: 12/19/2023]
Abstract
After peripheral nervous system injury, Schwann cells (SCs) can repair axons by providing a growth-promoting microenvironment. The aim of this study is to explore the effects and mechanisms of LKB1 and CRMP1 on the repair of sciatic nerve injury (SNI). The expressions of LKB1 and CRMP1 were changed in rats with SNI from 12 h to 4 weeks by hematoxylin-eosin staining, RT-PCR assay, immunohistochemical staining, and western blotting. Immunofluorescence results show that LKB1 and CRMP1 are co-localized in the regenerated axons of the sciatic nerve tissue of SNI rats. Co-immunoprecipitation indicates that LKB1 interacts with CRMP1. LKB1 interference suppresses the phosphorylation level of CRMP1. Overexpression of LKB1 and CRMP1 promotes the invasion and migration of SCs, and nerve cell protuberance extends. The structure of the myelin sheath in the sciatic nerve of the model group was found to be loose and disordered. Rats in the model group had higher pain thresholds and heat sensitivity response times than those in the control group. Nerve conduction velocity, the latency of action potential, and the peak value of compound muscle action potential in the SNI group were significantly lower than those in the control group, and the muscle atrophy was severe. Overexpression of LKB1 may significantly improve the above conditions. However, the function of LKB1 to improve SNI is abolished by the interference of CRMP1. In summary, the interaction between LKB1 and CRMP promotes the migration and differentiation of SCs and the extension of neurons, thereby improving the repair of nerve injury.
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Affiliation(s)
- Yang Liu
- Department of Orthopaedics, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China
- Department of Orthopaedics, The Second Affiliated Hospital of Nantong University, Nantong, Jiangsu, China
| | - You-Jia Xu
- Department of Orthopaedics, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China
- Department of Orthopaedics, The Second Affiliated Hospital of Nantong University, Nantong, Jiangsu, China
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34
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Wang J, Yao X, Xiong X, Liu Y, Zhao W, Zhang X, Li X, Wang J, Lei C, Jiang W, Zhang K, Li X, Weng Y, Li J, Zhang R, Zhang Z, Li H, Kong Q, Tian S, Lv Y, Mu L. Effect of ST36 electroacupuncture on the switch of skeletal muscle fibres in mice with sciatic nerve dissociation. Eur J Neurosci 2024; 59:192-207. [PMID: 38145884 DOI: 10.1111/ejn.16228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 11/14/2023] [Accepted: 12/04/2023] [Indexed: 12/27/2023]
Abstract
Skeletal muscle is striated muscle that moves autonomously and is innervated by peripheral nerves. Peripheral nerve injury is very common in clinical treatment. However, the commonly used treatment methods often focus on the regeneration of the injured nerve but overlook the pathological changes in the injured skeletal muscle. Acupuncture, as the main treatment for denervated skeletal muscle atrophy, is used extensively in clinical practice. In the present study, a mouse model of lower limb sciatic nerve detachment was constructed and treated with electroacupuncture Stomach 36 to observe the atrophy of lower limb skeletal muscle and changes in skeletal muscle fibre types before and after electroacupuncture Stomach 36 treatment. Mice with skeletal muscle denervation showed a decrease in the proportion of IIa muscle fibres and an increase in the proportion of IIb muscle fibres, after electroacupuncture Stomach 36. The changes were reversed by specific activators of p38 MAPK, which increased IIa myofibre ratio. The results suggest that electroacupuncture Stomach 36 can reverse the change of muscle fibre type from IIb to IIa after denervation of skeletal muscle by inhibiting p38 MAPK. The results provide an important theoretical basis for the treatment of clinical peripheral nerve injury diseases with electroacupuncture, in addition to novel insights that could facilitate the study of pathological changes of denervated skeletal muscle.
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Affiliation(s)
- Jinghua Wang
- Department of Neurology, The Second Affiliated Hospital of Harbin Medical University, Harbin Medical University, Harbin, China
- Department of Neurobiology, Heilongjiang Provincial Key Laboratory of Neurobiology, Harbin Medical University, Harbin, China
| | - Xiuhua Yao
- Tianjin Key Laboratory of Cerebral Vascular and Neurodegenerative Diseases, Tianjin Neurosurgical Institute, Tianjin Huanhu Hospital, Tianjin, China
| | - Xiaoyue Xiong
- Department of Neurobiology, Heilongjiang Provincial Key Laboratory of Neurobiology, Harbin Medical University, Harbin, China
| | - Yumei Liu
- Department of Neurobiology, Heilongjiang Provincial Key Laboratory of Neurobiology, Harbin Medical University, Harbin, China
| | - Wei Zhao
- Department of Neurobiology, Heilongjiang Provincial Key Laboratory of Neurobiology, Harbin Medical University, Harbin, China
| | - Xiaoyu Zhang
- Department of Neurobiology, Heilongjiang Provincial Key Laboratory of Neurobiology, Harbin Medical University, Harbin, China
| | - Xinrong Li
- Department of Neurobiology, Heilongjiang Provincial Key Laboratory of Neurobiology, Harbin Medical University, Harbin, China
| | - Jiaqi Wang
- Department of Neurobiology, Heilongjiang Provincial Key Laboratory of Neurobiology, Harbin Medical University, Harbin, China
| | - Cheng Lei
- Department of Neurobiology, Heilongjiang Provincial Key Laboratory of Neurobiology, Harbin Medical University, Harbin, China
| | - Wei Jiang
- Department of Neurobiology, Heilongjiang Provincial Key Laboratory of Neurobiology, Harbin Medical University, Harbin, China
| | - Kefan Zhang
- Department of Neurobiology, Heilongjiang Provincial Key Laboratory of Neurobiology, Harbin Medical University, Harbin, China
| | - Xiangyang Li
- Department of Neurobiology, Heilongjiang Provincial Key Laboratory of Neurobiology, Harbin Medical University, Harbin, China
| | - Yuting Weng
- Department of Neurobiology, Heilongjiang Provincial Key Laboratory of Neurobiology, Harbin Medical University, Harbin, China
| | - Jie Li
- Department of Neurobiology, Heilongjiang Provincial Key Laboratory of Neurobiology, Harbin Medical University, Harbin, China
| | - Ran Zhang
- Department of Neurobiology, Heilongjiang Provincial Key Laboratory of Neurobiology, Harbin Medical University, Harbin, China
| | - Zhaonan Zhang
- Department of Neurobiology, Heilongjiang Provincial Key Laboratory of Neurobiology, Harbin Medical University, Harbin, China
| | - Hulun Li
- Department of Neurobiology, Heilongjiang Provincial Key Laboratory of Neurobiology, Harbin Medical University, Harbin, China
| | - Qingfei Kong
- Department of Neurobiology, Heilongjiang Provincial Key Laboratory of Neurobiology, Harbin Medical University, Harbin, China
| | - Sijia Tian
- Department of Neurobiology, Heilongjiang Provincial Key Laboratory of Neurobiology, Harbin Medical University, Harbin, China
| | - Yanhua Lv
- Department of Neurology, 962 Hospital of the Joint Logistic Support Force of the People's Liberation Army of China, Harbin, China
| | - Lili Mu
- Department of Neurobiology, Heilongjiang Provincial Key Laboratory of Neurobiology, Harbin Medical University, Harbin, China
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35
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Green-Fulgham SM, Lacagnina MJ, Willcox KF, Li J, Harland ME, Ciena AP, Rocha IRC, Ball JB, Dreher RA, Zuberi YA, Dragavon JM, Chacur M, Maier SF, Watkins LR, Grace PM. Voluntary wheel running prevents formation of membrane attack complexes and myelin degradation after peripheral nerve injury. Brain Behav Immun 2024; 115:419-431. [PMID: 37924957 PMCID: PMC10842182 DOI: 10.1016/j.bbi.2023.10.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 10/04/2023] [Accepted: 10/28/2023] [Indexed: 11/06/2023] Open
Abstract
Regular aerobic activity is associated with a reduced risk of chronic pain in humans and rodents. Our previous studies in rodents have shown that prior voluntary wheel running can normalize redox signaling at the site of peripheral nerve injury, attenuating subsequent neuropathic pain. However, the full extent of neuroprotection offered by voluntary wheel running after peripheral nerve injury is unknown. Here, we show that six weeks of voluntary wheel running prior to chronic constriction injury (CCI) reduced the terminal complement membrane attack complex (MAC) at the sciatic nerve injury site. This was associated with increased expression of the MAC inhibitor CD59. The levels of upstream complement components (C3) and their inhibitors (CD55, CR1 and CFH) were altered by CCI, but not increased by voluntary wheel running. Since MAC can degrade myelin, which in turn contributes to neuropathic pain, we evaluated myelin integrity at the sciatic nerve injury site. We found that the loss of myelinated fibers and decreased myelin protein which occurs in sedentary rats following CCI was not observed in rats with prior running. Substitution of prior voluntary wheel running with exogenous CD59 also attenuated mechanical allodynia and reduced MAC deposition at the nerve injury site, pointing to CD59 as a critical effector of the neuroprotective and antinociceptive actions of prior voluntary wheel running. This study links attenuation of neuropathic pain by prior voluntary wheel running with inhibition of MAC and preservation of myelin integrity at the sciatic nerve injury site.
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Affiliation(s)
- Suzanne M Green-Fulgham
- Department of Psychology and Neuroscience, and the Center for Neuroscience, University of Colorado, Boulder, CO 80309, USA
| | - Michael J Lacagnina
- Laboratories of Neuroimmunology, Department of Symptom Research, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA; MD Anderson Pain Research Consortium, Houston, TX 77030, USA
| | - Kendal F Willcox
- Laboratories of Neuroimmunology, Department of Symptom Research, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA; MD Anderson Pain Research Consortium, Houston, TX 77030, USA
| | - Jiahe Li
- Laboratories of Neuroimmunology, Department of Symptom Research, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA; MD Anderson Pain Research Consortium, Houston, TX 77030, USA
| | - Michael E Harland
- Department of Psychology and Neuroscience, and the Center for Neuroscience, University of Colorado, Boulder, CO 80309, USA
| | - Adriano Polican Ciena
- Laboratory of Morphology and Physical Activity (LAMAF), Institute of Biosciences, São Paulo State University (UNESP), Rio Claro 13506-900, São Paulo, Brazil
| | - Igor R Correia Rocha
- Department of Psychology and Neuroscience, and the Center for Neuroscience, University of Colorado, Boulder, CO 80309, USA; Laboratory of Neuroanatomy Functional of Pain, Departamento de Anatomia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil
| | - Jayson B Ball
- Department of Psychology and Neuroscience, and the Center for Neuroscience, University of Colorado, Boulder, CO 80309, USA
| | - Renee A Dreher
- Department of Psychology and Neuroscience, and the Center for Neuroscience, University of Colorado, Boulder, CO 80309, USA
| | - Younus A Zuberi
- Laboratories of Neuroimmunology, Department of Symptom Research, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA; MD Anderson Pain Research Consortium, Houston, TX 77030, USA
| | - Joseph M Dragavon
- Advanced Light Microscopy Core, BioFrontiers Institute, University of Colorado, Boulder, CO 80309, USA
| | - Marucia Chacur
- Department of Psychology and Neuroscience, and the Center for Neuroscience, University of Colorado, Boulder, CO 80309, USA; Laboratory of Neuroanatomy Functional of Pain, Departamento de Anatomia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil
| | - Steven F Maier
- Department of Psychology and Neuroscience, and the Center for Neuroscience, University of Colorado, Boulder, CO 80309, USA
| | - Linda R Watkins
- Department of Psychology and Neuroscience, and the Center for Neuroscience, University of Colorado, Boulder, CO 80309, USA
| | - Peter M Grace
- Laboratories of Neuroimmunology, Department of Symptom Research, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA; MD Anderson Pain Research Consortium, Houston, TX 77030, USA.
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Hoveizi E. Enhancement of nerve regeneration through schwann cell-mediated healing in a 3D printed polyacrylonitrile conduit incorporating hydrogel and graphene quantum dots: a study on rat sciatic nerve injury model. Biomed Mater 2023; 19:015012. [PMID: 38091624 DOI: 10.1088/1748-605x/ad1576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Accepted: 12/13/2023] [Indexed: 12/22/2023]
Abstract
Despite recent technological advancements, effective healing from sciatic nerve damage remains inadequate. Cell-based therapies offer a promising alternative to autograft restoration for peripheral nerve injuries, and 3D printing techniques can be used to manufacture conduits with controlled diameter and size. In this study, we investigated the potential of Wharton's jelly-derived mesenchymal stem cells (WJMSCs) differentiated into schwann cells, using a polyacrylonitrile (PAN) conduit filled with fibrin hydrogel and graphene quantum dots (GQDs) to promote nerve regeneration in a rat sciatic nerve injury model. We investigated the potential of WJMSCs, extracted from the umbilical cord, to differentiate into schwann cells and promote nerve regeneration in a rat sciatic nerve injury model. WJMSCs were 3D cultured and differentiated into schwann cells within fibrin gel for two weeks. A 3 mm defect was created in the sciatic nerve of the rat model, which was then regenerated using a conduit/fibrin, conduit covered with schwann cells in fibrin/GQDs, GQDs in fibrin, and a control group without any treatment (n= 6/group). At 10 weeks after transplantation, motor and sensory functions and histological improvement were assessed. The WJMSCs were extracted, identified, and differentiated. The differentiated cells expressed typical schwann cell markers, S100 and P75.In vivoinvestigations established the durability and efficacy of the conduit to resist the pressures over two months of implantation. Histological measurements showed conduit efficiency, schwann cell infiltration, and association within the fibrin gel and lumen. Rats treated with the composite hydrogel-filled PAN conduit with GQDs showed significantly higher sensorial recovery than the other groups. Histological results showed that this group had significantly more axon numbers and remyelination than others. Our findings suggest that the conduit/schwann approach has the potential to improve nerve regeneration in peripheral nerve injuries, with future therapeutic implications.
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Affiliation(s)
- Elham Hoveizi
- Department of Biology, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran
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Hwang S, Seo M, Lee TH, Lee HJ, Park JW, Kwon BS, Nam K. Comparison of the Effects of Botulinum Toxin Doses on Nerve Regeneration in Rats with Experimentally Induced Sciatic Nerve Injury. Toxins (Basel) 2023; 15:691. [PMID: 38133195 PMCID: PMC10747296 DOI: 10.3390/toxins15120691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 12/04/2023] [Accepted: 12/06/2023] [Indexed: 12/23/2023] Open
Abstract
This study was designed to compare the effects of various doses of botulinum neurotoxin A (BoNT/A) on nerve regeneration. Sixty-five six-week-old rats with sciatic nerve injury were randomly allocated to three experimental groups, a control group, and a sham group. The experimental groups received a single session of intraneural BoNT/A (3.5, 7.0, or 14 U/kg) injection immediately after nerve-crushing injury. The control group received normal intraneural saline injections after sciatic nerve injury. At three, six, and nine weeks after nerve damage, immunofluorescence staining, an ELISA, and toluidine blue staining was used to evaluate the regenerated nerves. Serial sciatic functional index analyses and electrophysiological tests were performed every week for nine weeks. A higher expression of GFAP, S100β, GAP43, NF200, BDNF, and NGF was seen in the 3.5 U/kg and 7.0 U/kg BoNT/A groups. The average area and myelin thickness were significantly greater in the 3.5 U/kg and 7.0 U/kg BoNT/A groups. The sciatic functional index and compound muscle action potential amplitudes exhibited similar trends. These findings indicate that the 3.5 U/kg and 7.0 U/kg BoNT/A groups exhibited better nerve regeneration than the 14 U/kg BoNT/A and control group. As the 3.5 U/kg and the 7.0 U/kg BoNT/A groups exhibited no statistical difference, we recommend using 3.5 U/kg BoNT/A for its cost-effectiveness.
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Affiliation(s)
| | | | | | | | | | | | - Kiyeun Nam
- Department of Physical Medicine & Rehabilitation, Dongguk University College of Medicine, Goyang 10326, Republic of Korea; (S.H.); (M.S.); (T.H.L.); (H.J.L.); (J.-w.P.); (B.S.K.)
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Wu KY, Amrami KK, Hayford KM, Spinner RJ. Characterizing peroneal nerve injury clinicoradiological patterns with MRI in patients with sciatic neuropathy and foot drop after total hip replacement. J Neurosurg 2023; 139:1560-1567. [PMID: 37382352 DOI: 10.3171/2023.5.jns23173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Accepted: 05/01/2023] [Indexed: 06/30/2023]
Abstract
OBJECTIVE Sciatic nerve injury following total hip arthroplasty (THA) predominantly affects the peroneal division of the sciatic nerve, often causing a foot drop. This can result from a focal etiology (hardware malposition, prominent screw, or postoperative hematoma) or nonfocal/traction injury. The objective of this study was to compare the clinicoradiological features and define the extent of nerve injury resulting from these two distinct mechanisms. METHODS Patients who developed a postoperative foot drop within 1 year after primary or revision THA with a confirmed proximal sciatic neuropathy based on MRI or electrodiagnostic studies were retrospectively reviewed. Patients were divided into two cohorts: group 1 (focal injury), including patients with an identifiable focal structural etiology, and group 2 (nonfocal injury), including patients with a presumed traction injury. Patient demographics, clinical examinations, subsequent surgeries, electrodiagnostic study results, and MRI abnormalities were noted. The Student t-test was used to compare time to onset of foot drop and time to secondary surgery. RESULTS Twenty-one patients, treated by one surgeon, met inclusion criteria (8 men and 13 women; 14 primary THAs and 7 revision THAs). Group 1 had a significantly longer time from THA to the onset of foot drop, with a mean of 2 months, compared with an immediate postoperative onset in group 2 (p = 0.02). Group 1 had a consistent pattern of localized focal nerve abnormality on imaging. In contrast, the majority of patients in group 2 (n = 11) had a long, continuous segment of abnormal size and signal intensity of the nerve, while the other 3 patients had a segment of less abnormal nerve in the midthigh on imaging. All patients with a long continuous lesion had Medical Research Council grade 0 dorsiflexion prior to secondary nerve surgeries compared with 1 of 3 patients with a more normal midsegment. CONCLUSIONS There are distinct clinicoradiological findings in patients with sciatic injuries resulting from a focal structural etiology versus a traction injury. While there are discrete localized changes in patients with a focal etiology, those with traction injuries demonstrate a diffuse zone of abnormality within the sciatic nerve. A proposed mechanism involves anatomical tether points of the nerve acting as points of origin and propagation for traction injuries, resulting in an immediate postoperative foot drop. In contrast, patients with a focal etiology have localized imaging findings but a highly variable time to the onset of foot drop.
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Xu X, Ren P, Wang Y, Li J, Xiao S, Li J, Li X. An experimental model of peripheral nerve electrical injury in rats. Burns 2023; 49:1958-1968. [PMID: 37821288 DOI: 10.1016/j.burns.2023.03.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 02/27/2023] [Accepted: 03/06/2023] [Indexed: 03/12/2023]
Abstract
INTRODUCTION Although several studies have investigated models of nerve electrical injury, only a few have focused on electrical injury to peripheral nerves, which is a common and intractable problem in clinical practice. Here, we describe an experimental rat model of peripheral nerve electrical injury and its assessment. METHODS A total of 120 animals were subjected to short-term corrective electrostimulation (50 Hz, 1-s duration) applied at varying voltages (control, 65, 75, 100, 125, and 150 V) to the exposed left sciatic nerve. Behavioural testing, electrophysiological measurements, and histopathological observation of the sciatic nerve were conducted at 1-, 2-, 4-, and 8-w follow-ups. RESULTS No functional defects were noted in the groups that received 65-V stimulation at any time point. Sciatic nerve functional defects were found after 2 w in animals that received 75-V stimulation, but function returned to normal after 4 w. In animals that received 100-V and 125-V stimulation, functional defects were observed at 4 w, but had partially recovered by 8 w. Conversely, animals that received 150-V stimulation did not show recovery after 8 w. CONCLUSION We presented a model of peripheral nerve electrical injury that avoided the interference of various external factors, such as current instability, compression of the surrounding tissues, and altered blood supply. The model allowed quantitation and ranking of the nerve injury into four degrees. It facilitated effective evaluation of nerve function impairment and repair after injury. It can be used post-surgically to evaluate peripheral nerve impairment and reconstruction and enables translational interpretation of results, which may improve understanding of the mechanisms underlying the progression of peripheral nerve electrical injury.
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Affiliation(s)
- Xiaoli Xu
- Department of Burn and Plastic Surgery, The Second Affiliated Hospital of Air Force Medical University, Xi'an 710038, China
| | - Pan Ren
- Department of Burn and Plastic Surgery, The Second Affiliated Hospital of Air Force Medical University, Xi'an 710038, China
| | - Yan Wang
- Department of Burn and Plastic Surgery, The Second Affiliated Hospital of Air Force Medical University, Xi'an 710038, China
| | - Jing Li
- Department of Burn and Plastic Surgery, The Second Affiliated Hospital of Air Force Medical University, Xi'an 710038, China
| | - Shuao Xiao
- Department of Burn and Plastic Surgery, The Second Affiliated Hospital of Air Force Medical University, Xi'an 710038, China
| | - Jinqing Li
- Department of Burn and Plastic Surgery, The Second Affiliated Hospital of Air Force Medical University, Xi'an 710038, China
| | - Xueyong Li
- Department of Burn and Plastic Surgery, The Second Affiliated Hospital of Air Force Medical University, Xi'an 710038, China.
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Gupta DP, Bhusal A, Rahman MH, Kim JH, Choe Y, Jang J, Jung HJ, Kim UK, Park JS, Maeng LS, Suk K, Song GJ. EBP50 is a key molecule for the Schwann cell-axon interaction in peripheral nerves. Prog Neurobiol 2023; 231:102544. [PMID: 37940033 DOI: 10.1016/j.pneurobio.2023.102544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 10/25/2023] [Accepted: 11/02/2023] [Indexed: 11/10/2023]
Abstract
Peripheral nerve injury disrupts the Schwann cell-axon interaction and the cellular communication between them. The peripheral nervous system has immense potential for regeneration extensively due to the innate plastic potential of Schwann cells (SCs) that allows SCs to interact with the injured axons and exert specific repair functions essential for peripheral nerve regeneration. In this study, we show that EBP50 is essential for the repair function of SCs and regeneration following nerve injury. The increased expression of EBP50 in the injured sciatic nerve of control mice suggested a significant role in regeneration. The ablation of EBP50 in mice resulted in delayed nerve repair, recovery of behavioral function, and remyelination following nerve injury. EBP50 deficiency led to deficits in SC functions, including proliferation, migration, cytoskeleton dynamics, and axon interactions. The adeno-associated virus (AAV)-mediated local expression of EBP50 improved SCs migration, functional recovery, and remyelination. ErbB2-related proteins were not differentially expressed in EBP50-deficient sciatic nerves following injury. EBP50 binds and stabilizes ErbB2 and activates the repair functions to promote regeneration. Thus, we identified EBP50 as a potent SC protein that can enhance the regeneration and functional recovery driven by NRG1-ErbB2 signaling, as well as a novel regeneration modulator capable of potential therapeutic effects.
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Affiliation(s)
- Deepak Prasad Gupta
- Translational Brain Research Center, International St. Mary's Hospital, Catholic Kwandong University, Incheon, Republic of Korea; Department of Pharmacology, Brain Science and Engineering Institute, BK21 Plus KNU Biomedical Convergence Program, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Anup Bhusal
- Department of Pharmacology, Brain Science and Engineering Institute, BK21 Plus KNU Biomedical Convergence Program, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Md Habibur Rahman
- Department of Neurology, The Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Jae-Hong Kim
- Department of Pharmacology, Brain Science and Engineering Institute, BK21 Plus KNU Biomedical Convergence Program, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Youngshik Choe
- Korea Brain Research Institute, Daegu, Republic of Korea
| | - Jaemyung Jang
- Korea Brain Research Institute, Daegu, Republic of Korea
| | - Hyun Jin Jung
- Korea Brain Research Institute, Daegu, Republic of Korea
| | - Un-Kyung Kim
- Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu, Republic of Korea
| | - Jin-Sung Park
- Department of Neurology, School of Medicine, Kyungpook National University, Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea
| | - Lee-So Maeng
- Department of Hospital Pathology, Incheon St. Mary's Hospital College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Kyoungho Suk
- Department of Pharmacology, Brain Science and Engineering Institute, BK21 Plus KNU Biomedical Convergence Program, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Gyun Jee Song
- Translational Brain Research Center, International St. Mary's Hospital, Catholic Kwandong University, Incheon, Republic of Korea; Department of Medicine, College of Medicine, Catholic Kwandong University, Gangneung, Gangwon-do, Republic of Korea.
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Wang Y, Shi G, Huang TCT, Li J, Long Z, Reisdorf R, Shin AY, Amadio P, Behfar A, Zhao C, Moran SL. Enhancing Functional Recovery after Segmental Nerve Defect Using Nerve Allograft Treated with Plasma-Derived Exosome. Plast Reconstr Surg 2023; 152:1247-1258. [PMID: 36912739 DOI: 10.1097/prs.0000000000010389] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/14/2023]
Abstract
BACKGROUND Nerve injuries can result in detrimental functional outcomes. Currently, autologous nerve graft offers the best outcome for segmental peripheral nerve injury. Allografts are alternatives, but do not have comparable results. This study evaluated whether plasma-derived exosome can improve nerve regeneration and functional recovery when combined with decellularized nerve allografts. METHODS The effect of exosomes on Schwann cell proliferation and migration were evaluated. A rat model of sciatic nerve repair was used to evaluate the effect on nerve regeneration and functional recovery. A fibrin sealant was used as the scaffold for exosome. Eighty-four Lewis rats were divided into autograft, allograft, and allograft with exosome groups. Gene expression of nerve regeneration factors was analyzed on postoperative day 7. At 12 and 16 weeks, rats were subjected to maximum isometric tetanic force and compound muscle action potential. Nerve specimens were then analyzed by means of histology and immunohistochemistry. RESULTS Exosomes were readily taken up by Schwann cells that resulted in improved Schwann cell viability and migration. The treated allograft group had functional recovery (compound muscle action potential, isometric tetanic force) comparable to that of the autograft group. Similar results were observed in gene expression analysis of nerve regenerating factors. Histologic analysis showed no statistically significant differences between treated allograft and autograft groups in terms of axonal density, fascicular area, and myelin sheath thickness. CONCLUSIONS Plasma-derived exosome treatment of decellularized nerve allograft may provide comparable clinical outcomes to that of an autograft. This can be a promising strategy in the future as an alternative for segmental peripheral nerve repair. CLINICAL RELEVANCE STATEMENT Off-the-shelf exosomes may improve recovery in nerve allografts.
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Affiliation(s)
- Yicun Wang
- From the Department of Orthopedics, Jinling Hospital, School of Medicine, Nanjing University
- Division of Plastic Surgery, Department of Surgery
- Department of Orthopedic Surgery
| | - Guidong Shi
- Department of Orthopedic Surgery
- Tianjin Medical University
| | | | - Jialun Li
- Division of Plastic Surgery, Department of Surgery
- Department of Plastic Surgery, Wuhan Union Hospital, Huazhong University of Science and Technology
| | | | | | | | | | - Atta Behfar
- Center for Regenerative Medicine
- Department of Cardiovascular Medicine, Mayo Clinic
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Rahman M, Mahady Dip T, Padhye R, Houshyar S. Review on electrically conductive smart nerve guide conduit for peripheral nerve regeneration. J Biomed Mater Res A 2023; 111:1916-1950. [PMID: 37555548 DOI: 10.1002/jbm.a.37595] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 01/29/2023] [Accepted: 07/26/2023] [Indexed: 08/10/2023]
Abstract
At present, peripheral nerve injuries (PNIs) are one of the leading causes of substantial impairment around the globe. Complete recovery of nerve function after an injury is challenging. Currently, autologous nerve grafts are being used as a treatment; however, this has several downsides, for example, donor site morbidity, shortage of donor sites, loss of sensation, inflammation, and neuroma development. The most promising alternative is the development of a nerve guide conduit (NGC) to direct the restoration and renewal of neuronal axons from the proximal to the distal end to facilitate nerve regeneration and maximize sensory and functional recovery. Alternatively, the response of nerve cells to electrical stimulation (ES) has a substantial regenerative effect. The incorporation of electrically conductive biomaterials in the fabrication of smart NGCs facilitates the function of ES throughout the active proliferation state. This article overviews the potency of the various categories of electroactive smart biomaterials, including conductive and piezoelectric nanomaterials, piezoelectric polymers, and organic conductive polymers that researchers have employed latterly to fabricate smart NGCs and their potentiality in future clinical application. It also summarizes a comprehensive analysis of the recent research and advancements in the application of ES in the field of NGC.
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Affiliation(s)
- Mustafijur Rahman
- Center for Materials Innovation and Future Fashion (CMIFF), School of Fashion and Textiles, RMIT University, Brunswick, Australia
- Department of Dyes and Chemical Engineering, Bangladesh University of Textiles, Dhaka, Bangladesh
| | - Tanvir Mahady Dip
- Department of Materials, University of Manchester, Manchester, UK
- Department of Yarn Engineering, Bangladesh University of Textiles, Dhaka, Bangladesh
| | - Rajiv Padhye
- Center for Materials Innovation and Future Fashion (CMIFF), School of Fashion and Textiles, RMIT University, Brunswick, Australia
| | - Shadi Houshyar
- School of Engineering, RMIT University, Melbourne, Victoria, Australia
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Zoghoul Alsmadi N, Deister C, Agrawal N, Tran L, Zhukauskas R, Neubauer Fischer D, Mercer D. Characterization of Nerve Damage After an Injury to the Adjacent Soft Tissue: A Pilot Animal Study. Tissue Eng Part C Methods 2023; 29:547-557. [PMID: 37742110 PMCID: PMC10714259 DOI: 10.1089/ten.tec.2023.0151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 08/22/2023] [Indexed: 09/25/2023] Open
Abstract
Traumatic injuries may result in the formation of soft tissue adhesions between peripheral nerves and surrounding soft tissue. These soft tissue adhesions lead to compression and ischemic stress within fascicles due to nonpliability of adhered scar tissue, and nerve tension due to loss of nerve gliding from scar tethering. These changes in the soft tissue bed surrounding the nerve may result in axon degeneration and neuroma-in-continuity. Preclinical models that simulate clinically relevant levels of scar in the nerve environment may be impactful to the development of surgical techniques and treatments to prevent adhesions. This study presents the results of a rodent model with an induced indirect nerve injury by (1) thermal insult to the soft tissue bed surrounding the nerve and (2) air-drying the surrounding soft tissue bed of the nerve. Our findings suggest that inducing an injury of the soft tissue bed results in increased intraneural scar and extraneural adhesions to the nerve compared to a sham procedure. Thermal induced injuries showed more macrophages and changes in nerve health compared to air-dried induced injuries. The changes in the nerves of the induced injury groups, specifically the thermal injury group, may be meaningful for evaluating treatments for nontransected nerve injuries.
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Affiliation(s)
| | - Curt Deister
- Department of Research & Development, Axogen Corporation, Tampa, Florida, USA
| | - Nik Agrawal
- Department of Research & Development, Axogen Corporation, Tampa, Florida, USA
| | - Lan Tran
- Department of Research & Development, Axogen Corporation, Tampa, Florida, USA
| | - Rasa Zhukauskas
- Department of Research & Development, Axogen Corporation, Tampa, Florida, USA
| | | | - Deana Mercer
- Department of Orthopedics & Rehabilitation, University of New Mexico, Albuquerque, New Mexico, USA
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Liu N, Zhang GX, Zhu CH, Lan XB, Tian MM, Zheng P, Peng XD, Li YX, Yu JQ. Antinociceptive and neuroprotective effect of echinacoside on peripheral neuropathic pain in mice through inhibiting P2X7R/FKN/CX3CR1 pathway. Biomed Pharmacother 2023; 168:115675. [PMID: 37812887 DOI: 10.1016/j.biopha.2023.115675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 10/04/2023] [Accepted: 10/06/2023] [Indexed: 10/11/2023] Open
Abstract
Clinically, neuropathic pain treatment remains a challenging issue because the major therapy, centred around pharmacological intervention, is not satisfactory enough to patient by reason of low effectiveness and more adverse reaction. Therefore, it is still necessary to find more effective and safe therapy to ameliorate neuropathic pain. The purpose of this study was to explore the antinociceptive effect of Echinacoside (ECH), an active compound of Cistanche deserticola Ma, on peripheral neuropathic pain induced by chronic constriction injury (CCI) in mice, and to demonstrate its potential mechanism in vivo and vitro. In the present study, results showed that intraperitoneal administration of ECH (50, 100, and 200 mg/kg) could alleviate mechanical allodynia, cold allodynia and thermal hyperalgesia via behavioural test. Moreover, the structure and function of injured sciatic nerve by CCI were taken a turn for the better to a certain extent after ECH treatment using histopathological and electrophysiological test. Furthermore, ECH repressed the expression of the P2X7R and FKN and reduced the expression and release of the IL-1β, IL-6 and TNF-α. Besides, ECH could decrease Ca2+ influx and Cats efflux and inhibit phosphorylation of p38MAPK. To sum up, the present study illustrated that ECH could alleviate peripheral neuropathic pain by inhibiting microglia overactivation and inflammation through P2X7R/FKN/CX3CR1 signalling pathway in spinal cord. This study would provide a new perspective and strategy for the pharmacological treatment on neuropathic pain.
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Affiliation(s)
- Ning Liu
- Ningxia Key Laboratory of Drug Development and Generic Drug Research, School of Pharmacy, Ningxia Medical University, Yinchuan, China
| | - Guo-Xin Zhang
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
| | - Chun-Hao Zhu
- School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, China
| | - Xiao-Bing Lan
- Ningxia Key Laboratory of Drug Development and Generic Drug Research, School of Pharmacy, Ningxia Medical University, Yinchuan, China
| | - Miao-Miao Tian
- Ningxia Key Laboratory of Drug Development and Generic Drug Research, School of Pharmacy, Ningxia Medical University, Yinchuan, China
| | - Ping Zheng
- Ningxia Key Laboratory of Drug Development and Generic Drug Research, School of Pharmacy, Ningxia Medical University, Yinchuan, China
| | - Xiao-Dong Peng
- Ningxia Key Laboratory of Drug Development and Generic Drug Research, School of Pharmacy, Ningxia Medical University, Yinchuan, China
| | - Yu-Xiang Li
- School of Nursing, Ningxia Medical University, Yinchuan, China.
| | - Jian-Qiang Yu
- Ningxia Key Laboratory of Drug Development and Generic Drug Research, School of Pharmacy, Ningxia Medical University, Yinchuan, China.
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Zhang F, Li Q, Ma B, Zhang M, Kou Y. Chitosan-Based Conduits with Different Inner Diameters at both Ends Combined with Modified Formula Radix Hedysari Promote Nerve Transposition Repair. FRONT BIOSCI-LANDMRK 2023; 28:298. [PMID: 38062831 DOI: 10.31083/j.fbl2811298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 07/26/2023] [Accepted: 08/08/2023] [Indexed: 12/18/2023]
Abstract
BACKGROUND Severe peripheral nerve injuries, such as deficits over long distances or proximal nerve trunk injuries, pose complex reconstruction challenges that often result in unfavorable outcomes. An innovative approach to repairing severe peripheral nerve damage involves using conduit suturing for nerve transposition repair. Cylindrical nerve guides are typically unsuitable for nerve transposition repair. Moreover, postsurgical adjuvant treatment is essential to promote the development of axonal lateral sprouts, proximal growth, and the restoration of neurostructure and function. The purpose of this research is to assess the impact of chitosan-based conduits with varying inner diameters on nerve transposition repair when combined with modified formula Radix Hedysari (MFRH). METHODS Using chitosan, we created conduits with varying inner diameters on both ends. These conduits were then utilized to repair the distal common peroneal and tibial nerves in SD rats using the proximal common peroneal nerve. Subsequently, MFRH was employed as a supplementary treatment. The assessment of the repair's effectiveness took place 16 weeks postsurgery, utilizing a range of techniques, including the neurological nerve function index, neuroelectrophysiological measurements, muscle wet weight, and examination of nerve and muscle histology. RESULTS The outcomes of our study showed that following 16 weeks of postoperative treatment, MFRH had a significant positive impact on the recovery of neuromotor and nerve conduction abilities. Moreover, there was a significant increase in the ratio of wet weight of muscles, cross-sectional area of muscle fibers, quantity and structure of regenerated myelinated nerve fibers, and the count of neurons. CONCLUSIONS A combination of chitosan-based chitin conduits possessing different inner diameters and MFRH can considerably promote the regeneration and functional recovery of damaged nerves, which in turn enhances nerve transposition repair efficacy.
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Affiliation(s)
- Fengshi Zhang
- Department of Orthopedics and Trauma, Peking University People's Hospital, 100044 Beijing, China
- Key Laboratory of Trauma and Neural Regeneration, Peking University, 100044 Beijing, China
- National Center for Trauma Medicine, 100044 Beijing, China
| | - Qicheng Li
- Department of Orthopedics and Trauma, Peking University People's Hospital, 100044 Beijing, China
- Key Laboratory of Trauma and Neural Regeneration, Peking University, 100044 Beijing, China
- National Center for Trauma Medicine, 100044 Beijing, China
| | - Bo Ma
- Department of Orthopedics and Trauma, Peking University People's Hospital, 100044 Beijing, China
- Key Laboratory of Trauma and Neural Regeneration, Peking University, 100044 Beijing, China
- National Center for Trauma Medicine, 100044 Beijing, China
| | - Meng Zhang
- Department of Orthopedics and Trauma, Peking University People's Hospital, 100044 Beijing, China
- Key Laboratory of Trauma and Neural Regeneration, Peking University, 100044 Beijing, China
- National Center for Trauma Medicine, 100044 Beijing, China
| | - Yuhui Kou
- Department of Orthopedics and Trauma, Peking University People's Hospital, 100044 Beijing, China
- Key Laboratory of Trauma and Neural Regeneration, Peking University, 100044 Beijing, China
- National Center for Trauma Medicine, 100044 Beijing, China
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Xia L, Li P, Bi W, Yang R, Zhang Y. CDK5R1 promotes Schwann cell proliferation, migration, and production of neurotrophic factors via CDK5/BDNF/TrkB after sciatic nerve injury. Neurosci Lett 2023; 817:137514. [PMID: 37848102 DOI: 10.1016/j.neulet.2023.137514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 06/25/2023] [Accepted: 10/08/2023] [Indexed: 10/19/2023]
Abstract
Cyclin-dependent kinase 5 regulatory subunit 1 (CDK5R1) is necessary for central nervous system development and neuronal migration. At present, there are few reports about the role of CDK5R1 in peripheral nerve injury, and these need to be further explored. The CCK-8 and EdU assay was performed to examine cell proliferation. The migration ability of Schwann cells was tested by the cell scratch test. The apoptosis of Schwann cells was detected by flow cytometry. Sciatic nerve injury model in rats was established by crush injury. The sciatic function index (SFI) and the paw withdrawal mechanical threshold (PWMT) were measured at different time points. The results revealed that overexpression of CDK5R1 promoted the proliferation and migration of Schwann cells, and inhibited the apoptosis. Further studies found that pcDNA3.1-CDK5R1 significantly upregulated the expression of CDK5, BDNF and TrkB. More importantly, CDK5R1 promoted the recovery of nerve injury in rats. In addition, the CDK5 mediated BDNF/TrkB pathway was involved in the molecular mechanism of CDK5R1 on Schwann cells. It is suggested that the mechanism by which CDK5R1 promotes functional recovery after sciatic nerve injury is by CDK5 mediated activation of BDNF/TrkB signaling pathways.
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Affiliation(s)
- Lei Xia
- School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China; Department of Hand Surgery, HongHui Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi 710054, China
| | - Peng Li
- Department of Hand Surgery, HongHui Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi 710054, China
| | - Wenchao Bi
- Department of Hand Surgery, HongHui Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi 710054, China
| | - Ruize Yang
- Department of Hand Surgery, HongHui Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi 710054, China
| | - Yuelin Zhang
- School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China.
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Mishra M, Maiti SK, Elangovan K, Shivaramu S, Singh KP, S AB, Mamachan M, Arya M, Mishra D, Hescheler J. Evaluation of Stem Cell Laden Collagen + Polycaprolactone + Multi-Walled Carbon Nano-Tubes Nano-Neural Scaffold with and Without Insulin Like Growth Factor-I For Sciatic Nerve Regeneration Post Crush Injury in Wistar Rats. Cell Physiol Biochem 2023; 57:452-477. [PMID: 37978922 DOI: 10.33594/000000670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/06/2023] [Indexed: 11/19/2023] Open
Abstract
BACKGROUND/AIMS All body functions are activated, synchronized and controlled by a substantial, complex network, the nervous system. Upon injury, pathophysiology of the nerve injury proceeds through different paths. The axon may undergo a degenerative retraction from the site of injury for a short distance unless the injury is near to the cell body, in which case it continues to the soma and undergoes retrograde neuronal degeneration. Otherwise, the distal section suffers from Wallerian degeneration, which is marked by axonal swelling, spheroids, and cytoskeleton degeneration. The objective of the study was to evaluate the potential of mesenchymal stem cell laden neural scaffold and insulin-like growth factor I (IGF-I) in nerve regeneration following sciatic nerve injury in a rat model. METHODS The animals were anaesthetized and a cranio-lateral incision over left thigh was made. Sciatic nerve was exposed and crush injury was introduced for 90 seconds using haemostat at second locking position. The muscle and skin were sutured in routine fashion and thus the rat model of sciatic crush injury was prepared. The animal models were equally distributed into 5 different groups namely A, B, C, D and E and treated with phosphate buffer saline (PBS), carbon nanotubes based neural scaffold only, scaffold with IGF-I, stem cell laden scaffold and stem cell laden scaffold with IGF-I respectively. In vitro scaffold testing was performed. The nerve regeneration was assessed based on physico-neuronal, biochemical, histopathological examination, and relative expression of NRP-1, NRP-2 and GAP-43 and scanning electron microscopy. RESULTS Sciatic nerve injury model with crush injury produced for 90 seconds was standardized and successfully used in this study. All the biochemical parameters were in normal range in all the groups indicating no scaffold related changes. Physico-neuronal, histopathological, relative gene expression and scanning electron microscopy observations revealed appreciable nerve regeneration in groups E and D, followed by C and B. Restricted to no regeneration was observed in group A. CONCLUSION Carbon nanotubes based scaffold provided electro-conductivity for proper neuronal regeneration while rat bone marrow-derived mesenchymal stem cells were found to induce axonal sprouting, cellular transformation; whereas IGF-I induced stem cell differentiation, myelin synthesis, angiogenesis and muscle differentiation.
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Affiliation(s)
- Mamta Mishra
- Division of Veterinary Surgery and Radiology, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, India
| | - Swapan Kumar Maiti
- Division of Veterinary Surgery and Radiology, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, India,
| | - Kalaiselvan Elangovan
- Division of Veterinary Surgery and Radiology, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, India
| | - Shivaraju Shivaramu
- Division of Veterinary Surgery and Radiology, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, India
| | - Karam Pal Singh
- CADRAD, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, India
| | - Amitha Banu S
- Division of Veterinary Surgery and Radiology, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, India
| | - Merlin Mamachan
- Division of Veterinary Surgery and Radiology, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, India
| | - Manish Arya
- Division of Veterinary Surgery and Radiology, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, India
| | - Divya Mishra
- Division of Animal Biotechnology, ICAR-Indian Veterinary Research Institute, Izatnagar, Bareilly, Uttar Pradesh, India
| | - Jurgen Hescheler
- Institute of Neurophysiology, University of Cologne, Cologne, Germany
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Rosenbalm TN, Levi NH, Morykwas MJ, Wagner WD. Electrical stimulation via repeated biphasic conducting materials for peripheral nerve regeneration. J Mater Sci Mater Med 2023; 34:61. [PMID: 37964030 PMCID: PMC10645611 DOI: 10.1007/s10856-023-06763-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Accepted: 10/26/2023] [Indexed: 11/16/2023]
Abstract
Improved materials for peripheral nerve repair are needed for the advancement of new surgical techniques in fields spanning from oncology to trauma. In this study, we developed bioresorbable materials capable of producing repeated electric field gradients spaced 600 μm apart to assess the impact on neuronal cell growth, and migration. Electrically conductive, biphasic composites comprised of poly (glycerol) sebacate acrylate (PGSA) alone, and doped with poly (pyrrole) (PPy), were prepared to create alternating segments with high and low electrically conductivity. Conductivity measurements demonstrated that 0.05% PPy added to PSA achieved an optimal value of 1.25 × 10-4 S/cm, for subsequent electrical stimulation. Tensile testing and degradation of PPy doped and undoped PGSA determined that 35-40% acrylation of PGSA matched nerve mechanical properties. Both fibroblast and neuronal cells thrived when cultured upon the composite. Biphasic PGSA/PPy sheets seeded with neuronal cells stimulated for with 3 V, 20 Hz demonstrated a 5x cell increase with 1 day of stimulation and up to a 10x cell increase with 3 days stimulation compared to non-stimulated composites. Tubular conduits composed of repeated high and low conductivity materials suitable for implantation in the rat sciatic nerve model for nerve repair were evaluated in vivo and were superior to silicone conduits. These results suggest that biphasic conducting conduits capable of maintaining mechanical properties without inducing compression injuries while generating repeated electric fields are a promising tool for acceleration of peripheral nerve repair to previously untreatable patients.
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Affiliation(s)
- Tabitha N Rosenbalm
- School of Biomedical Engineering and Sciences, Wake Forest University-Virginia Polytechnic Institute and State University, Winston-Salem, NC, 27106, USA
- Department of Plastic and Reconstructive Surgery, Wake Forest Baptist Health, Winston-Salem, NC, 27157, USA
| | - Nicole H Levi
- School of Biomedical Engineering and Sciences, Wake Forest University-Virginia Polytechnic Institute and State University, Winston-Salem, NC, 27106, USA.
- Department of Plastic and Reconstructive Surgery, Wake Forest Baptist Health, Winston-Salem, NC, 27157, USA.
| | - Michael J Morykwas
- School of Biomedical Engineering and Sciences, Wake Forest University-Virginia Polytechnic Institute and State University, Winston-Salem, NC, 27106, USA
- Department of Plastic and Reconstructive Surgery, Wake Forest Baptist Health, Winston-Salem, NC, 27157, USA
| | - William D Wagner
- School of Biomedical Engineering and Sciences, Wake Forest University-Virginia Polytechnic Institute and State University, Winston-Salem, NC, 27106, USA
- Department of Plastic and Reconstructive Surgery, Wake Forest Baptist Health, Winston-Salem, NC, 27157, USA
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Sosa MKS, Boorman DC, Keay KA. The impact of sciatic nerve injury and social interactions testing on glucocorticoid receptor expression in catecholaminergic medullary cell populations. Brain Res 2023; 1819:148542. [PMID: 37604315 DOI: 10.1016/j.brainres.2023.148542] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 08/09/2023] [Accepted: 08/18/2023] [Indexed: 08/23/2023]
Abstract
Paradoxically, while acute pain leads to transiently elevated corticosterone, chronic pain does not result in persistently elevated corticosterone. In the sciatic nerve chronic constriction injury (CCI) model of chronic pain, we have shown that the same nerve injury produces a range of behavioural outcomes, each associated with distinctive adaptations to the HPA-axis to achieve stable plasma corticosterone levels. We also demonstrated that CRF and GR expression in the paraventricular hypothalamus (PVH) was increased in rats that showed persistent changes to their social behaviours during Resident-Intruder testing ('Persistent Effect' rats) when compared to rats that showed no behavioural changes ('No Effect' rats). In this study, we investigated whether these changes were driven in part by altered sensitivity of the brainstem catecholaminergic pathways (known to regulate the PVH) to glucocorticoids. GR expression in adrenergic (C1,C2) and noradrenergic (A1,A2) cells was determined using immunohistochemistry in behaviourally tested CCI rats and in uninjured controls. We found no differences between Persistent Effect and No Effect rats in (1) the glucocorticoid sensitivity of these cells, or (2) the numbers of adrenergic and noradrenergic cells in each region. However, we discovered an overall reduction in GR expression in the non-catecholaminergic cells of these regions in both experimental groups when compared to uninjured controls, most likely attributable to the repeated Resident-Intruder testing. Taken together, these data suggest strongly that brainstem mechanisms are unlikely to play a key role in the rebalancing of the HPA-axis triggered by CCI, increasing the probability that these changes are driven by supra-hypothalamic regions.
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Affiliation(s)
- Maria K S Sosa
- School of Medical Sciences and the Brain and Mind Centre, The University of Sydney, New South Wales 2006, Australia
| | - Damien C Boorman
- School of Medical Sciences and the Brain and Mind Centre, The University of Sydney, New South Wales 2006, Australia
| | - Kevin A Keay
- School of Medical Sciences and the Brain and Mind Centre, The University of Sydney, New South Wales 2006, Australia.
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Lan D, Wu B, Zhang H, Chen X, Li Z, Dai F. Novel Bioinspired Nerve Scaffold with High Synchrony between Biodegradation and Nerve Regeneration for Repair of Peripheral Nerve Injury. Biomacromolecules 2023; 24:5451-5466. [PMID: 37917398 DOI: 10.1021/acs.biomac.3c00920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2023]
Abstract
The morphological structure reconstruction and functional recovery of long-distance peripheral nerve injury (PNI) are global medical challenges. Biodegradable nerve scaffolds that provide mechanical support for the growth and extension of neurites are a desired way to repair long-distance PNI. However, the synchrony of scaffold degradation and nerve regeneration is still challenging. Here, a novel bioinspired multichannel nerve guide conduit (MNGC) with topographical cues based on silk fibroin and ε-polylysine modification was constructed. This conduit (SF(A) + PLL MNGC) exhibited sufficient mechanical strength, excellent degradability, and favorable promotion of cell growth. Peripheral nerve repairing was evaluated by an in vivo 10 mm rat sciatic model. In vivo evidence demonstrated that SF(A) + PLL MNGC was completely biodegraded in the body within 4 weeks after providing sufficient physical support and guide for neurite extension, and a 10 mm sciatic nerve defect was effectively repaired without scar formation, indicating a high synchronous effect of scaffold biodegradation and nerve regeneration. More importantly, the regenerated nerve of the SF(A) + PLL MNGC group showed comparable morphological reconstruction and functional recovery to that of autologous nerve transplantation. This work proved that the designed SF(A) + PLL MNGC has potential for application in long-distance PNI repair in the clinic.
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Affiliation(s)
- Dongwei Lan
- State Key Laboratory of Resource Insects, Southwest University, Chongqing 400715, China
- College of Sericulture, Textile and Biomass Science, Southwest University, Chongqing 400715, China
| | - Baiqing Wu
- State Key Laboratory of Resource Insects, Southwest University, Chongqing 400715, China
- College of Sericulture, Textile and Biomass Science, Southwest University, Chongqing 400715, China
| | - Haiqiang Zhang
- State Key Laboratory of Resource Insects, Southwest University, Chongqing 400715, China
- College of Sericulture, Textile and Biomass Science, Southwest University, Chongqing 400715, China
| | - Xiang Chen
- State Key Laboratory of Resource Insects, Southwest University, Chongqing 400715, China
- College of Sericulture, Textile and Biomass Science, Southwest University, Chongqing 400715, China
| | - Zhi Li
- State Key Laboratory of Resource Insects, Southwest University, Chongqing 400715, China
- College of Sericulture, Textile and Biomass Science, Southwest University, Chongqing 400715, China
| | - Fangyin Dai
- State Key Laboratory of Resource Insects, Southwest University, Chongqing 400715, China
- Key Laboratory for Sericulture Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing 400715, China
- College of Sericulture, Textile and Biomass Science, Southwest University, Chongqing 400715, China
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