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Jain S, Voulgaris D, Thongkorn S, Hesen R, Hägg A, Moslem M, Falk A, Herland A. On-Chip Neural Induction Boosts Neural Stem Cell Commitment: Toward a Pipeline for iPSC-Based Therapies. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2401859. [PMID: 38655836 PMCID: PMC11220685 DOI: 10.1002/advs.202401859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Indexed: 04/26/2024]
Abstract
The clinical translation of induced pluripotent stem cells (iPSCs) holds great potential for personalized therapeutics. However, one of the main obstacles is that the current workflow to generate iPSCs is expensive, time-consuming, and requires standardization. A simplified and cost-effective microfluidic approach is presented for reprogramming fibroblasts into iPSCs and their subsequent differentiation into neural stem cells (NSCs). This method exploits microphysiological technology, providing a 100-fold reduction in reagents for reprogramming and a ninefold reduction in number of input cells. The iPSCs generated from microfluidic reprogramming of fibroblasts show upregulation of pluripotency markers and downregulation of fibroblast markers, on par with those reprogrammed in standard well-conditions. The NSCs differentiated in microfluidic chips show upregulation of neuroectodermal markers (ZIC1, PAX6, SOX1), highlighting their propensity for nervous system development. Cells obtained on conventional well plates and microfluidic chips are compared for reprogramming and neural induction by bulk RNA sequencing. Pathway enrichment analysis of NSCs from chip showed neural stem cell development enrichment and boosted commitment to neural stem cell lineage in initial phases of neural induction, attributed to a confined environment in a microfluidic chip. This method provides a cost-effective pipeline to reprogram and differentiate iPSCs for therapeutics compliant with current good manufacturing practices.
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Affiliation(s)
- Saumey Jain
- Division of Micro and NanosystemsKTH Royal Institute of TechnologyMalvinas väg 10Stockholm100 44Sweden
- Division of NanobiotechnologyScience for Life LaboratoryKTH Royal Institute of TechnologyTomtebodavägen 23aSolna171 65Sweden
| | - Dimitrios Voulgaris
- Division of Micro and NanosystemsKTH Royal Institute of TechnologyMalvinas väg 10Stockholm100 44Sweden
- Division of NanobiotechnologyScience for Life LaboratoryKTH Royal Institute of TechnologyTomtebodavägen 23aSolna171 65Sweden
- AIMESCenter for Integrated Medical and Engineering ScienceDepartment of NeuroscienceKarolinska InstitutetSolna171 65Sweden
| | - Surangrat Thongkorn
- Division of NanobiotechnologyScience for Life LaboratoryKTH Royal Institute of TechnologyTomtebodavägen 23aSolna171 65Sweden
- Chulalongkorn Autism Research and Innovation Center of Excellence (Chula ACE)Department of Clinical ChemistryFaculty of Allied Health SciencesChulalongkorn UniversityBangkok10330Thailand
| | - Rick Hesen
- Division of Micro and NanosystemsKTH Royal Institute of TechnologyMalvinas väg 10Stockholm100 44Sweden
| | - Alice Hägg
- Neural Stem CellsDepartment of Experimental Medical ScienceLund Stem Cell CenterLund UniversityLund221 84Sweden
| | - Mohsen Moslem
- Department of NeuroscienceKarolinska InstitutetSolna171 65Sweden
| | - Anna Falk
- Neural Stem CellsDepartment of Experimental Medical ScienceLund Stem Cell CenterLund UniversityLund221 84Sweden
- Department of NeuroscienceKarolinska InstitutetSolna171 65Sweden
| | - Anna Herland
- Division of Micro and NanosystemsKTH Royal Institute of TechnologyMalvinas väg 10Stockholm100 44Sweden
- Division of NanobiotechnologyScience for Life LaboratoryKTH Royal Institute of TechnologyTomtebodavägen 23aSolna171 65Sweden
- AIMESCenter for Integrated Medical and Engineering ScienceDepartment of NeuroscienceKarolinska InstitutetSolna171 65Sweden
- Department of NeuroscienceKarolinska InstitutetSolna171 65Sweden
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Li M, Wang X, Qi B, Cui S, Zheng T, Guan Y, Ma L, Liu S, Li Q, Chen Z, Jian F. Treatment of Syringomyelia Characterized by Focal Dilatation of the Central Canal Using Mesenchymal Stem Cells and Neural Stem Cells. Tissue Eng Regen Med 2024; 21:625-639. [PMID: 38578425 PMCID: PMC11087409 DOI: 10.1007/s13770-024-00637-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 02/03/2024] [Accepted: 03/05/2024] [Indexed: 04/06/2024] Open
Abstract
BACKGROUND Syringomyelia is a progressive chronic disease that leads to nerve pain, sensory dissociation, and dyskinesia. Symptoms often do not improve after surgery. Stem cells have been widely explored for the treatment of nervous system diseases due to their immunoregulatory and neural replacement abilities. METHODS In this study, we used a rat model of syringomyelia characterized by focal dilatation of the central canal to explore an effective transplantation scheme and evaluate the effect of mesenchymal stem cells and induced neural stem cells for the treatment of syringomyelia. RESULTS The results showed that cell transplantation could not only promote syrinx shrinkage but also stimulate the proliferation of ependymal cells, and the effect of this result was related to the transplantation location. These reactions appeared only when the cells were transplanted into the cavity. Additionally, we discovered that cell transplantation transformed activated microglia into the M2 phenotype. IGF1-expressing M2 microglia may play a significant role in the repair of nerve pain. CONCLUSION Cell transplantation can promote cavity shrinkage and regulate the local inflammatory environment. Moreover, the proliferation of ependymal cells may indicate the activation of endogenous stem cells, which is important for the regeneration and repair of spinal cord injury.
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Affiliation(s)
- Mo Li
- Department of Neurosurgery, China International Neuroscience Institute, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China
- Cell Therapy Center, Beijing Institute of Geriatrics, Xuanwu Hospital, Capital Medical University, Key Laboratory of Neurodegeneration, Ministry of Education, Beijing, 100053, China
- Center of Neural Injury and Repair, Beijing Institute for Brain Disorders, Beijing, China
- Center of Parkinson's Disease, Beijing Institute for Brain Disorders, Beijing, China
| | - Xinyu Wang
- Department of Neurosurgery, China International Neuroscience Institute, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China
| | - Boling Qi
- Cell Therapy Center, Beijing Institute of Geriatrics, Xuanwu Hospital, Capital Medical University, Key Laboratory of Neurodegeneration, Ministry of Education, Beijing, 100053, China
- Center of Neural Injury and Repair, Beijing Institute for Brain Disorders, Beijing, China
- Center of Parkinson's Disease, Beijing Institute for Brain Disorders, Beijing, China
| | - Shengyu Cui
- Department of Neurosurgery, China International Neuroscience Institute, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China
| | - Tianqi Zheng
- Cell Therapy Center, Beijing Institute of Geriatrics, Xuanwu Hospital, Capital Medical University, Key Laboratory of Neurodegeneration, Ministry of Education, Beijing, 100053, China
- Center of Neural Injury and Repair, Beijing Institute for Brain Disorders, Beijing, China
- Center of Parkinson's Disease, Beijing Institute for Brain Disorders, Beijing, China
| | - Yunqian Guan
- Department of Neurosurgery, China International Neuroscience Institute, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China
- Cell Therapy Center, Beijing Institute of Geriatrics, Xuanwu Hospital, Capital Medical University, Key Laboratory of Neurodegeneration, Ministry of Education, Beijing, 100053, China
- Center of Neural Injury and Repair, Beijing Institute for Brain Disorders, Beijing, China
- Center of Parkinson's Disease, Beijing Institute for Brain Disorders, Beijing, China
| | - Longbing Ma
- Department of Neurosurgery, China International Neuroscience Institute, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China
| | - Sumei Liu
- Cell Therapy Center, Beijing Institute of Geriatrics, Xuanwu Hospital, Capital Medical University, Key Laboratory of Neurodegeneration, Ministry of Education, Beijing, 100053, China
- Center of Neural Injury and Repair, Beijing Institute for Brain Disorders, Beijing, China
- Center of Parkinson's Disease, Beijing Institute for Brain Disorders, Beijing, China
| | - Qian Li
- Department of Neurosurgery, China International Neuroscience Institute, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China
| | - Zhiguo Chen
- Cell Therapy Center, Beijing Institute of Geriatrics, Xuanwu Hospital, Capital Medical University, Key Laboratory of Neurodegeneration, Ministry of Education, Beijing, 100053, China.
- Center of Neural Injury and Repair, Beijing Institute for Brain Disorders, Beijing, China.
- Center of Parkinson's Disease, Beijing Institute for Brain Disorders, Beijing, China.
| | - Fengzeng Jian
- Department of Neurosurgery, China International Neuroscience Institute, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China.
- Research Center of Spine and Spinal Cord, Beijing Institute for Brain Disorders, Capital Medical University, Beijing, China.
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Winn D, Uhlin E, Kele M, Eidhof I, Falk A. Pre-clinical evaluation of clinically relevant iPS cell derived neuroepithelial stem cells as an off-the-shelf cell therapy for spinal cord injury. Front Pharmacol 2024; 15:1390058. [PMID: 38841365 PMCID: PMC11150580 DOI: 10.3389/fphar.2024.1390058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Accepted: 05/03/2024] [Indexed: 06/07/2024] Open
Abstract
Preclinical transplantations using human neuroepithelial stem (NES) cells in spinal cord injury models have exhibited promising results and demonstrated cell integration and functional improvement in transplanted animals. Previous studies have relied on the generation of research grade cell lines in continuous culture. Using fresh cells presents logistic hurdles for clinical transition regarding time and resources for maintaining high quality standards. In this study, we generated a good manufacturing practice (GMP) compliant human iPS cell line in GMP clean rooms alongside a research grade iPS cell line which was produced using standardized protocols with GMP compliant chemicals. These two iPS cell lines were differentiated into human NES cells, from which six batches of cell therapy doses were produced. The doses were cryopreserved, thawed on demand and grafted in a rat spinal cord injury model. Our findings demonstrate that NES cells can be directly grafted post-thaw with high cell viability, maintaining their cell identity and differentiation capacity. This opens the possibility of manufacturing off-the-shelf cell therapy products. Moreover, our manufacturing process yields stable cell doses with minimal batch-to-batch variability, characterized by consistent expression of identity markers as well as similar viability of cells across the two iPS cell lines. These cryopreserved cell doses exhibit sustained viability, functionality, and quality for at least 2 years. Our results provide proof of concept that cryopreserved NES cells present a viable alternative to transplanting freshly cultured cells in future cell therapies and exemplify a platform from which cell formulation can be optimized and facilitate the transition to clinical trials.
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Affiliation(s)
- Dania Winn
- Department of Neuroscience, Karolinska Institutet, Solna, Sweden
| | - Elias Uhlin
- Department of Neuroscience, Karolinska Institutet, Solna, Sweden
- Lund University, Department of Experimental Medical Science, Lund, Sweden
| | - Malin Kele
- Department of Neuroscience, Karolinska Institutet, Solna, Sweden
| | - Ilse Eidhof
- Department of Neuroscience, Karolinska Institutet, Solna, Sweden
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Solna, Sweden
| | - Anna Falk
- Department of Neuroscience, Karolinska Institutet, Solna, Sweden
- Lund University, Department of Experimental Medical Science, Lund, Sweden
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Wu L, Lu J, Lan T, Zhang D, Xu H, Kang Z, Peng F, Wang J. Stem cell therapies: a new era in the treatment of multiple sclerosis. Front Neurol 2024; 15:1389697. [PMID: 38784908 PMCID: PMC11111935 DOI: 10.3389/fneur.2024.1389697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Accepted: 04/22/2024] [Indexed: 05/25/2024] Open
Abstract
Multiple Sclerosis (MS) is an immune-mediated condition that persistently harms the central nervous system. While existing treatments can slow its course, a cure remains elusive. Stem cell therapy has gained attention as a promising approach, offering new perspectives with its regenerative and immunomodulatory properties. This article reviews the application of stem cells in MS, encompassing various stem cell types, therapeutic potential mechanisms, preclinical explorations, clinical research advancements, safety profiles of clinical applications, as well as limitations and challenges, aiming to provide new insights into the treatment research for MS.
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Affiliation(s)
- Lei Wu
- Changchun University of Chinese Medicine, Changchun, China
| | - Jing Lu
- The Affiliated Hospital to Changchun University of Traditional Chinese Medicine, Changchun, China
| | - Tianye Lan
- The Affiliated Hospital to Changchun University of Traditional Chinese Medicine, Changchun, China
| | - Dongmei Zhang
- The Affiliated Hospital to Changchun University of Traditional Chinese Medicine, Changchun, China
| | - Hanying Xu
- Changchun University of Chinese Medicine, Changchun, China
| | - Zezheng Kang
- Changchun University of Chinese Medicine, Changchun, China
| | - Fang Peng
- Hunan Provincial People's Hospital, Changsha, China
| | - Jian Wang
- The Affiliated Hospital to Changchun University of Traditional Chinese Medicine, Changchun, China
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Patil N, Korenfeld O, Scalf RN, Lavoie N, Huntemer-Silveira A, Han G, Swenson R, Parr AM. Electrical stimulation affects the differentiation of transplanted regionally specific human spinal neural progenitor cells (sNPCs) after chronic spinal cord injury. Stem Cell Res Ther 2023; 14:378. [PMID: 38124191 PMCID: PMC10734202 DOI: 10.1186/s13287-023-03597-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Accepted: 12/04/2023] [Indexed: 12/23/2023] Open
Abstract
BACKGROUND There are currently no effective clinical therapies to ameliorate the loss of function that occurs after spinal cord injury. Electrical stimulation of the rat spinal cord through the rat tail has previously been described by our laboratory. We propose combinatorial treatment with human induced pluripotent stem cell-derived spinal neural progenitor cells (sNPCs) along with tail nerve electrical stimulation (TANES). The purpose of this study was to examine the influence of TANES on the differentiation of sNPCs with the hypothesis that the addition of TANES would affect incorporation of sNPCs into the injured spinal cord, which is our ultimate goal. METHODS Chronically injured athymic nude rats were allocated to one of three treatment groups: injury only, sNPC only, or sNPC + TANES. Rats were sacrificed at 16 weeks post-transplantation, and tissue was processed and analyzed utilizing standard histological and tissue clearing techniques. Functional testing was performed. All quantitative data were presented as mean ± standard error of the mean. Statistics were conducted using GraphPad Prism. RESULTS We found that sNPCs were multi-potent and retained the ability to differentiate into mainly neurons or oligodendrocytes after this transplantation paradigm. The addition of TANES resulted in more transplanted cells differentiating into oligodendrocytes compared with no TANES treatment, and more myelin was found. TANES not only promoted significantly higher numbers of sNPCs migrating away from the site of injection but also influenced long-distance axonal/dendritic projections especially in the rostral direction. Further, we observed localization of synaptophysin on SC121-positive cells, suggesting integration with host or surrounding neurons, and this finding was enhanced when TANES was applied. Also, rats that were transplanted with sNPCs in combination with TANES resulted in an increase in serotonergic fibers in the lumbar region. This suggests that TANES contributes to integration of sNPCs, as well as activity-dependent oligodendrocyte and myelin remodeling of the chronically injured spinal cord. CONCLUSIONS Together, the data suggest that the added electrical stimulation promoted cellular integration and influenced the fate of human induced pluripotent stem cell-derived sNPCs transplanted into the injured spinal cord.
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Affiliation(s)
- Nandadevi Patil
- Department of Neurosurgery, Stem Cell Institute, University of Minnesota, 2-214 MTRF, 2001 6th St. SE, Minneapolis, MN, 55455, USA
| | - Olivia Korenfeld
- Department of Neurosurgery, Stem Cell Institute, University of Minnesota, 2-214 MTRF, 2001 6th St. SE, Minneapolis, MN, 55455, USA
| | - Rachel N Scalf
- Department of Neurosurgery, Stem Cell Institute, University of Minnesota, 2-214 MTRF, 2001 6th St. SE, Minneapolis, MN, 55455, USA
| | - Nicolas Lavoie
- Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA, 02139, USA
| | - Anne Huntemer-Silveira
- Department of Neurosurgery, Stem Cell Institute, University of Minnesota, 2-214 MTRF, 2001 6th St. SE, Minneapolis, MN, 55455, USA
| | - Guebum Han
- Department of Mechanical Engineering, College of Science and Engineering, University of Minnesota, 1100 Mechanical Engineering Building, 111 Church St. SE, Minneapolis, MN, 55455, USA
| | - Riley Swenson
- Department of Neurosurgery, Stem Cell Institute, University of Minnesota, 2-214 MTRF, 2001 6th St. SE, Minneapolis, MN, 55455, USA
| | - Ann M Parr
- Department of Neurosurgery, Stem Cell Institute, University of Minnesota, MMC 96, 420 Delaware St. SE, Minneapolis, MN, 55455, USA.
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Sun C, Deng J, Ma Y, Meng F, Cui X, Li M, Li J, Li J, Yin P, Kong L, Zhang L, Tang P. The dual role of microglia in neuropathic pain after spinal cord injury: Detrimental and protective effects. Exp Neurol 2023; 370:114570. [PMID: 37852469 DOI: 10.1016/j.expneurol.2023.114570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 09/21/2023] [Accepted: 10/11/2023] [Indexed: 10/20/2023]
Abstract
Spinal cord injury (SCI) is a debilitating condition that is frequently accompanied by neuropathic pain, resulting in significant physical and psychological harm to a vast number of individuals globally. Despite the high prevalence of neuropathic pain following SCI, the precise underlying mechanism remains incompletely understood. Microglia are a type of innate immune cell that are present in the central nervous system (CNS). They have been observed to have a significant impact on neuropathic pain following SCI. This article presents a comprehensive overview of recent advances in understanding the role of microglia in the development of neuropathic pain following SCI. Specifically, the article delves into the detrimental and protective effects of microglia on neuropathic pain following SCI, as well as the mechanisms underlying their interconversion. Furthermore, the article provides a thorough overview of potential avenues for future research in this area.
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Affiliation(s)
- Chang Sun
- Department of Orthopedics, The Fourth Medical Center of Chinese PLA General Hospital, Beijing, China; National Clinical Research Center for Orthopedics, Sports Medicine and Rehabilitation, Beijing, China; Department of Orthopedics, Air Force Medical Center, PLA, Beijing, China
| | - Junhao Deng
- Department of Orthopedics, The Fourth Medical Center of Chinese PLA General Hospital, Beijing, China; National Clinical Research Center for Orthopedics, Sports Medicine and Rehabilitation, Beijing, China; School of Life Sciences, Tsinghua University, Beijing, China; State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments, Tsinghua University, Beijing, China; IDG/McGovern Institute for Brain Research, Tsinghua University, Beijing, China
| | - Yifei Ma
- School of Medicine, Nankai University, Tianjin, China
| | - Fanqi Meng
- Department of Anesthesiology, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Xiang Cui
- Department of Orthopedics, The Fourth Medical Center of Chinese PLA General Hospital, Beijing, China; National Clinical Research Center for Orthopedics, Sports Medicine and Rehabilitation, Beijing, China
| | - Ming Li
- Department of Orthopedics, The Fourth Medical Center of Chinese PLA General Hospital, Beijing, China; National Clinical Research Center for Orthopedics, Sports Medicine and Rehabilitation, Beijing, China
| | - Jiantao Li
- Department of Orthopedics, The Fourth Medical Center of Chinese PLA General Hospital, Beijing, China; National Clinical Research Center for Orthopedics, Sports Medicine and Rehabilitation, Beijing, China
| | - Jia Li
- Department of Orthopedics, The Fourth Medical Center of Chinese PLA General Hospital, Beijing, China; National Clinical Research Center for Orthopedics, Sports Medicine and Rehabilitation, Beijing, China
| | - Pengbin Yin
- Department of Orthopedics, The Fourth Medical Center of Chinese PLA General Hospital, Beijing, China; National Clinical Research Center for Orthopedics, Sports Medicine and Rehabilitation, Beijing, China
| | - Lingjie Kong
- State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments, Tsinghua University, Beijing, China; IDG/McGovern Institute for Brain Research, Tsinghua University, Beijing, China.
| | - Licheng Zhang
- Department of Orthopedics, The Fourth Medical Center of Chinese PLA General Hospital, Beijing, China; National Clinical Research Center for Orthopedics, Sports Medicine and Rehabilitation, Beijing, China.
| | - Peifu Tang
- Department of Orthopedics, The Fourth Medical Center of Chinese PLA General Hospital, Beijing, China; National Clinical Research Center for Orthopedics, Sports Medicine and Rehabilitation, Beijing, China.
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Lu C, Wu X, Wang X, Xiao Z, Ma L, Dai J, Jian F. Single-cell transcriptomics reveals ependymal subtypes related to cytoskeleton dynamics as the core driver of syringomyelia pathological development. iScience 2023; 26:106850. [PMID: 37275526 PMCID: PMC10232665 DOI: 10.1016/j.isci.2023.106850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 03/05/2023] [Accepted: 05/04/2023] [Indexed: 06/07/2023] Open
Abstract
Syringomyelia is a common clinical lesion associated with cerebrospinal fluid flow abnormalities. By a reversible model with chronic extradural compression to mimic human canalicular syringomyelia, we explored the spatiotemporal pathological alterations during syrinx development. The most dynamic alterations were observed in ependymal cells (EPCs), oligodendrocyte lineage, and microglia, as a response to neuroinflammation. Among different cell types, EPC subtypes experienced obvious dynamic alterations, which were accompanied by ultrastructural changes involving the ependymal cytoskeleton, cilia, and dynamic injury in parenchyma primarily around the central canal, corresponding to the single-cell transcripts. After effective decompression, the syrinx resolved with the recovery of pathological damage and overall neurological function, implying that for syringomyelia in the early stage, there was still endogenous repair potential coexisting with immune microenvironment imbalance. Ependymal remodeling and cilia restoration might be important for better resolution of syringomyelia and parenchymal injury recovery.
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Affiliation(s)
- Chunli Lu
- Division of Spine, Department of Neurosurgery, Xuanwu Hospital, Capital Medical University (CCMU), Beijing, China
- Neurospine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, CCMU, Beijing, China
- Lab of Spinal Cord Injury and Function Reconstruction, CHINA-INI, Beijing, China
- National Center for Neurological Disorders, Beijing, China
| | - Xianming Wu
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Xinyu Wang
- Division of Spine, Department of Neurosurgery, Xuanwu Hospital, Capital Medical University (CCMU), Beijing, China
- Neurospine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, CCMU, Beijing, China
- Lab of Spinal Cord Injury and Function Reconstruction, CHINA-INI, Beijing, China
- National Center for Neurological Disorders, Beijing, China
| | - Zhifeng Xiao
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Longbing Ma
- Division of Spine, Department of Neurosurgery, Xuanwu Hospital, Capital Medical University (CCMU), Beijing, China
- Neurospine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, CCMU, Beijing, China
- Lab of Spinal Cord Injury and Function Reconstruction, CHINA-INI, Beijing, China
- National Center for Neurological Disorders, Beijing, China
| | - Jianwu Dai
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Fengzeng Jian
- Division of Spine, Department of Neurosurgery, Xuanwu Hospital, Capital Medical University (CCMU), Beijing, China
- Neurospine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, CCMU, Beijing, China
- Lab of Spinal Cord Injury and Function Reconstruction, CHINA-INI, Beijing, China
- National Center for Neurological Disorders, Beijing, China
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Liu S, Ma L, Qi B, Li Q, Chen Z, Jian F. Suppression of TGFβR-Smad3 pathway alleviates the syrinx induced by syringomyelia. Cell Biosci 2023; 13:98. [PMID: 37248485 DOI: 10.1186/s13578-023-01048-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Accepted: 05/06/2023] [Indexed: 05/31/2023] Open
Abstract
BACKGROUND Syringomyelia is a cerebrospinal fluid (CSF) disorder resulted in separation of pain and temperature, dilation of central canal and formation of syrinx in central canal. It is unclear about mechanisms of the dilation and syrinx formation. We aimed to investigate roles of ependymal cells lining central canal on the dilation, trying to reduce syrinx formation in central canal. METHODS We employed 78 Sprague-Dawley (SD) rats totally with syringomyelia to detect the contribution of ependymal cells to the dilation of central canal. Immunofluorescence was used to examine the activation of ependymal cells in 54 syringomyelia rat models. BrdU was used to indicate the proliferation of ependymal cells through intraperitoneal administration in 6 syringomyelia rat models. 18 rats with syringomyelia were injected with SIS3, an inhibitor of TGFβR-Smad3, and rats injected with DMSO were used as control. Among the 18 rats, 12 rats were used for observation of syrinx following SIS3 or DMSO administration by using magnetic resonance imaging (MRI) on day 14 and day 30 under syringomyelia without decompression. All the data were expressed as mean ± standard deviation (mean ± SD). Differences between groups were compared using the two-tailed Student's t-test or ANOVA. Differences were considered significant when *p < 0.05. RESULTS Our study showed the dilation and protrusions of central canal on day 5 and enlargement from day 14 after syringomyelia induction in rats with activation of ependymal cells lining central canal. Moreover, the ependymal cells contributed to protrusion formation possibly through migration along with central canal. Furthermore, suppression of TGFβR-Smad3 which was crucial for migration reversed the size of syrnix in central canal without treatment of decompression, suggesting TGFβR-Smad3 signal might be key for dilation of central canal and formation of syrinx. CONCLUSIONS The size of syrinx was decreased after SIS3 administration without decompression. Our study depicted the mechanisms of syrinx formation and suggested TGFβR-Smad3 signal might be key for dilation of central canal and formation of syrinx.
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Affiliation(s)
- Sumei Liu
- Department of Neurosurgery, China International Neuroscience Institute, Xuanwu Hospital Capital Medical University, 45 Changchun Street, Beijing, 100053, China
- Cell Therapy Center, Xuanwu Hospital Capital Medical University, 45 Changchun Street, Beijing, 100053, China
| | - Longbing Ma
- Department of Neurosurgery, China International Neuroscience Institute, Xuanwu Hospital Capital Medical University, 45 Changchun Street, Beijing, 100053, China
| | - Boling Qi
- Cell Therapy Center, Xuanwu Hospital Capital Medical University, 45 Changchun Street, Beijing, 100053, China
| | - Qian Li
- Department of Neurosurgery, China International Neuroscience Institute, Xuanwu Hospital Capital Medical University, 45 Changchun Street, Beijing, 100053, China
| | - Zhiguo Chen
- Cell Therapy Center, Xuanwu Hospital Capital Medical University, 45 Changchun Street, Beijing, 100053, China.
| | - Fengzeng Jian
- Department of Neurosurgery, China International Neuroscience Institute, Xuanwu Hospital Capital Medical University, 45 Changchun Street, Beijing, 100053, China.
- Spine Center, China International Neuroscience Institute (CHINA-INI), Beijing, China.
- Lab of Spinal Cord Injury and Functional Reconstruction, Xuanwu Hospital, Capital Medical University, Beijing, China.
- Research Center of Spine and Spinal Cord, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China.
- National Center for Neurological Disorders, Beijing, China.
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