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Wang Y, Chen Y, Li Z, Tang L, Wen D, Wu Y, Guo Z. Electroacupuncture enhances cerebral blood perfusion by inhibiting HIF-1α in rat subarachnoid hemorrhage. Brain Res 2024; 1839:149010. [PMID: 38763503 DOI: 10.1016/j.brainres.2024.149010] [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: 04/10/2024] [Revised: 05/06/2024] [Accepted: 05/16/2024] [Indexed: 05/21/2024]
Abstract
OBJECTIVE Cerebral blood perfusion (CBP) reduction is a prevalent complication following subarachnoid hemorrhage (SAH) in clinical practice, often associated with long-term cognitive impairment and prognosis. Electroacupuncture (EA), a widely utilized traditional Chinese therapy for central nervous system disorders, has demonstrated promising therapeutic effects. This study aims to investigate the therapeutic potential of EA in restoring CBP in SAH rats and to explore the mechanisms involving HIF-1α in this process. METHODS Rats were randomly assigned to one of five groups, including Sham, SAH, EA, EA + Saline, and EA + dimethyloxallyl glycine (DMOG) groups. EA treatment was administered for 10 min daily, while DMOG were intraperitoneally injected. Behavioral tests, cerebral blood flow monitoring, vascular thickness measurement, western blotting, and immunofluorescence staining were conducted to assess the therapeutic effects of EA on cerebral blood flow. RESULTS SAH resulted in elevated levels of HIF-1α, endothelin (ET), ICAM-1, P-SELECTIN, E-SELECTIN, and decreased level of eNOS in the brain. This led to cerebral vasospasm, decreased CBF, and cognitive deficits in the rat SAH model. EA intervention downregulated the expression of HIF-1α, ET, ICAM-1, P-SELECTIN, and E-SELECTIN, while increasing eNOS expression. This alleviated cerebral vasospasm, restored CBF, and improved cognitive function. However, the administration of the HIF-1α stabilizer (DMOG) counteracted the therapeutic effects of EA. CONCLUSION EA promotes the recovery of cerebral blood flow after SAH injury, attenuates cerebral vasospasm, and accelerates the recovery of cognitive dysfunction, and its mechanism of action may be related to the inhibition of the HIF-1α signaling pathway.
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Affiliation(s)
- Yingwen Wang
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Yu Chen
- Department of Rehabilitation, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China
| | - Zhao Li
- Emergency Department, Chengdu First People's Hospital, Chengdu, Sichuan Province, China.
| | - Liuyang Tang
- Department of Neurosurgery, The People's Hospital of Qijiang District, 401420, China
| | - Daochen Wen
- Department of Neurosurgery, Xuanhan County People's Hospital, Dazhou, China.
| | - Yue Wu
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China.
| | - Zongduo Guo
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China.
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Wan MM, Jin T, Fu ZY, Lai SH, Gao WP. Electroacupuncture Alleviates Dry Eye Ocular Pain Through TNF-ɑ Mediated ERK1/2/P2X 3R Signaling Pathway in SD Rats. J Pain Res 2023; 16:4241-4252. [PMID: 38107367 PMCID: PMC10725190 DOI: 10.2147/jpr.s436258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Accepted: 12/04/2023] [Indexed: 12/19/2023] Open
Abstract
Purpose This study aimed to examine electroacupuncture's influence on ocular pain and its potential modulation of the TNF-ɑ mediated ERK1/2/P2X3R signaling pathway in dry eye-induced rat models. Methods Male Sprague-Dawley rats with induced dry eye, achieved through extraorbital lacrimal gland removal, were treated with electroacupuncture. Comprehensive metrics such as the corneal mechanical perception threshold, palpebral fissure height, eyeblink frequency, eye wiping duration, behavioral changes in the open field test, and the forced swimming test were employed. Additionally, morphological changes in microglia and neurons were observed. Expression patterns of key markers, TNF-ɑ, TNFR1, p-ERK1/2, and P2X3R, in the trigeminal ganglion (TG) and spinal trigeminal nucleus caudalis (SpVc) regions, were studied with etanercept serving as a control to decipher the biochemistry of electroacupuncture's therapeutic effects. Results Electroacupuncture treatment demonstrated a notable decrease in the corneal mechanical perception threshold, improvement in palpebral fissure height, and significant reductions in both eyeblink frequency and eye wiping duration. Moreover, it exhibited a promising role in anxiety alleviation. Notably, the technique effectively diminished ocular pain by curbing microglial and neuronal activation in the TG and SpVc regions. Furthermore, it potently downregulated TNF-ɑ, TNFR1, p-ERK1/2, and P2X3R expression within these regions. Conclusion Electroacupuncture attenuated damage to sensory nerve pathways, reduced pain, and eased anxiety in dry eye-afflicted rats. The findings suggest a crucial role of TNF-ɑ mediated ERK1/2/P2X3R signaling pathway inhibition by electroacupuncture in these benefits.
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Affiliation(s)
- Mi-Mi Wan
- Department of Ophthalmology, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, People’s Republic of China
| | - Tuo Jin
- Department of Ophthalmology, Kunshan Hospital of Chinese Medicine, Suzhou, People’s Republic of China
| | - Zhang-Yitian Fu
- Department of Ophthalmology, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, People’s Republic of China
| | - Si-Hua Lai
- Department of Ophthalmology, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, People’s Republic of China
| | - Wei-Ping Gao
- Department of Ophthalmology, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, People’s Republic of China
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Chen M, Guo P, Ru X, Chen Y, Zuo S, Feng H. Myelin sheath injury and repairment after subarachnoid hemorrhage. Front Pharmacol 2023; 14:1145605. [PMID: 37077816 PMCID: PMC10106687 DOI: 10.3389/fphar.2023.1145605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Accepted: 03/24/2023] [Indexed: 04/05/2023] Open
Abstract
Subarachnoid hemorrhage (SAH) can lead to damage to the myelin sheath in white matter. Through classification and analysis of relevant research results, the discussion in this paper provides a deeper understanding of the spatiotemporal change characteristics, pathophysiological mechanisms and treatment strategies of myelin sheath injury after SAH. The research progress for this condition was also systematically reviewed and compared related to myelin sheath in other fields. Serious deficiencies were identified in the research on myelin sheath injury and treatment after SAH. It is necessary to focus on the overall situation and actively explore different treatment methods based on the spatiotemporal changes in the characteristics of the myelin sheath, as well as the initiation, intersection and common action point of the pathophysiological mechanism, to finally achieve accurate treatment. We hope that this article can help researchers in this field to further clarify the challenges and opportunities in the current research on myelin sheath injury and treatment after SAH.
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Affiliation(s)
- Mao Chen
- Department of Neurology, Xinqiao Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Peiwen Guo
- Department of Neurosurgery and State Key Laboratory of Trauma, Burn and Combined Injury, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
- Chongqing Key Laboratory of Precision Neuromedicine and Neuroregenaration, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
- Chongqing Clinical Research Center for Neurosurgery, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Xufang Ru
- Department of Neurosurgery and State Key Laboratory of Trauma, Burn and Combined Injury, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
- Chongqing Key Laboratory of Precision Neuromedicine and Neuroregenaration, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
- Chongqing Clinical Research Center for Neurosurgery, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Yujie Chen
- Department of Neurosurgery and State Key Laboratory of Trauma, Burn and Combined Injury, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
- Chongqing Key Laboratory of Precision Neuromedicine and Neuroregenaration, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
- Chongqing Clinical Research Center for Neurosurgery, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
- *Correspondence: Yujie Chen, ; Shilun Zuo,
| | - Shilun Zuo
- Department of Neurology, Xinqiao Hospital, Third Military Medical University (Army Medical University), Chongqing, China
- Department of Neurosurgery and State Key Laboratory of Trauma, Burn and Combined Injury, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
- Chongqing Key Laboratory of Precision Neuromedicine and Neuroregenaration, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
- Chongqing Clinical Research Center for Neurosurgery, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
- *Correspondence: Yujie Chen, ; Shilun Zuo,
| | - Hua Feng
- Department of Neurosurgery and State Key Laboratory of Trauma, Burn and Combined Injury, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
- Chongqing Key Laboratory of Precision Neuromedicine and Neuroregenaration, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
- Chongqing Clinical Research Center for Neurosurgery, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
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Wang Y, Yang X, Cao Y, Li X, Xu R, Yan J, Guo Z, Sun S, Sun X, Wu Y. Electroacupuncture promotes remyelination and alleviates cognitive deficit via promoting OPC differentiation in a rat model of subarachnoid hemorrhage. Metab Brain Dis 2023; 38:687-698. [PMID: 36383326 DOI: 10.1007/s11011-022-01102-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 10/10/2022] [Indexed: 11/17/2022]
Abstract
Subarachnoid hemorrhage (SAH) is a devastating cerebral vascular disease which causes neurological deficits including long-term cognitive deficit. Demyelination of white matter is correlated with cognitive deficit in SAH. Electroacupuncture (EA) is a traditional Chinese medical treatment which protects against cognitive deficit in varies of neurological diseases. However, whether EA exerts protective effect on cognitive function in SAH has not been investigated. The underlying mechanism of remyelination regulated by EA remains unclear. This study aimed to investigate the protective effects of EA on cognitive deficit in a rat model of SAH. SAH was induced in SD rats (n = 72) by endovascular perforation. Rats in EA group received EA treatment (10 min per day) under isoflurane anesthesia after SAH. Rats in SAH and sham groups received the same isoflurane anesthesia with no treatment. The mortality rate, neurological score, cognitive function, cerebral blood flow (CBF), and remyelination in sham, SAH and EA groups were assessed at 21 d after SAH.EA treatment alleviated cognitive deficits and myelin injury of rats compared with that in SAH group. Moreover, EA treatment enhanced remyelination in white matter and promoted the differentiation of OPCs after SAH. EA treatment inhibited the expression of Id2 and promoted the expression of SOX10 in oligodendrocyte cells. Additionally, the cerebral blood flow (CBF) of rats was increased by EA compared with that in SAH group. EA treatment exerts protective effect against cognitive deficit in the late phase of SAH. The underlying mechanisms involve promoting oligodendrocyte progenitor cell (OPC) differentiation and remyelination in white matter via regulating the expression of Id2 and SOX10. The improvement of CBF may also account for the protective effect of EA on cognitive function. EA treatment is a potential therapy for the treatment of cognitive deficit after SAH.
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Affiliation(s)
- Yingwen Wang
- Departement of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, NO.1 of Youyi Road, Yuzhong District, Chongqing, China
| | - Xiaomin Yang
- Departement of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, NO.1 of Youyi Road, Yuzhong District, Chongqing, China
| | - Yunchuan Cao
- Departement of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, NO.1 of Youyi Road, Yuzhong District, Chongqing, China
| | - Xiaoguo Li
- Departement of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, NO.1 of Youyi Road, Yuzhong District, Chongqing, China
| | - Rui Xu
- Departement of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, NO.1 of Youyi Road, Yuzhong District, Chongqing, China
| | - Jin Yan
- Departement of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, NO.1 of Youyi Road, Yuzhong District, Chongqing, China
| | - Zongduo Guo
- Departement of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, NO.1 of Youyi Road, Yuzhong District, Chongqing, China
| | - Shanquan Sun
- Institute of Neuroscience, Chongqing Medical University, Chongqing, China
| | - Xiaochuan Sun
- Departement of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, NO.1 of Youyi Road, Yuzhong District, Chongqing, China.
| | - Yue Wu
- Departement of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, NO.1 of Youyi Road, Yuzhong District, Chongqing, China.
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Zhang B, Guo X. Electroacupuncture promotes nerve regeneration and functional recovery in rats with spinal cord contusion through the coordinate interaction of CD4 and BDNF. IBRAIN 2022; 8:285-301. [PMID: 37786738 PMCID: PMC10529162 DOI: 10.1002/ibra.12055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 07/04/2022] [Accepted: 07/06/2022] [Indexed: 10/04/2023]
Abstract
To explore the effect of electroacupuncture on spinal cord injury (SCI) involving immune-related factors and regeneration-related factors in rats. The model of spinal cord contusion was established by PCI 3000 instrument. Two types of acupuncture points were selected for electroacupuncture treatment on rats. The rats were tested once a week, and the fiber remodeling was detected by magnetic resonance imaging. Transcriptome sequencing was performed on spinal scar samples. Using Python to write code, statistical analysis and bioinformatics analysis of the correlation between transcriptome sequencing data and fiber reconstruction results are carried out. Lastly, the expression of CD4 and brain-derived neurotrophic factor (BDNF) in spinal cord scar was verified by quantitative reverse-transcription polymerase chain reaction (qRT-PCR). Electroacupuncture exhibited a positive effect on the recovery of motor function in rats after SCI. Bioinformatics analysis found a direct interaction between CD4 and BDNF. Transcriptome sequencing and PCR results verified that electroacupuncture significantly reduced the expression of CD4, and increased significantly the expression of BDNF, simultaneously corresponding to nerve regeneration in rats with SCI. Our results showed that electroacupuncture intervention in SCI rats improves neural behavior via inhibiting the expression of CD4 and increasing the expression of BDNF.
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Affiliation(s)
- Bao‐Lei Zhang
- Department of AnatomyJinzhou Medical UniversityJinzhouLiaoningChina
- Department of Experimental ZoologyKunming Medical UniversityKunmingYunnanChina
| | - Xi‐Liang Guo
- Department of Experimental ZoologyKunming Medical UniversityKunmingYunnanChina
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Zhao P, Fu H, Cheng H, Zheng R, Yuan D, Yang J, Li S, Li E, Li L. Acupuncture at ST36 Alleviates the Behavioral Disorder of Autistic Rats by Inhibiting TXNIP-Mediated Activation of NLRP3. J Neuropathol Exp Neurol 2022; 81:127-134. [PMID: 35015875 DOI: 10.1093/jnen/nlab132] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Autism is a common neurodevelopmental disorder that severely affects patients' quality of life. We aimed to investigate whether acupuncture at Zusanli (ST36) could alleviate the behavior disorder of autistic rats by inhibiting thioredoxin-interacting protein (TXNIP)-mediated activation of NLRP3. An autism model was induced by intraperitoneal injection of pregnant rats with valproic acid (VPA). The pups' behaviors were analyzed using hot plate, open field, Morris water maze, and 3-chamber social interaction tests. Nissl staining was used to visualize neurons in prefrontal cortex. Levels of TXNIP, NLRP3, interleukin (IL)-1β, and caspase were determined by Western blot or quantitative real-time PCR. After ST36 acupuncture, pain sensitivity, autonomous activity, sociability index, sociability preference index, and learning and memory were improved in the autism model rats. Levels of TXNIP, NLRP3, IL-1β, and caspase 1 were decreased after acupuncture. Interference with TXNIP alleviated the behavior disorders and inhibited NLRP3, caspase 1, and IL-1β levels. In summary, ST36 acupuncture reduced TXNIP expression, inhibited the activation of the NLRP3 inflammasome, and alleviated the behavior disorder related to the prefrontal cortex of the autistic rats. These results point to a potential mechanism for acupuncture-induced improvement of autistic behavioral disorders.
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Affiliation(s)
- Pengju Zhao
- Department of Children Rehabilitation, Key Laboratory of Rehabilitation Medicine in Henan, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Hongguang Fu
- Institute of Health Engineering, Zhengzhou Health Vocational College, Zhengzhou, China
| | - Hui Cheng
- Department of Children Rehabilitation, Key Laboratory of Rehabilitation Medicine in Henan, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Ruijuan Zheng
- Department of Children Rehabilitation, Key Laboratory of Rehabilitation Medicine in Henan, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Dan Yuan
- Institute of Health Engineering, Zhengzhou Health Vocational College, Zhengzhou, China
| | - Jianquan Yang
- Department of Children Rehabilitation, Key Laboratory of Rehabilitation Medicine in Henan, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Sheng Li
- College of Life Sciences, Sichuan University, Chengdu, China
| | - Enyao Li
- Department of Children Rehabilitation, Key Laboratory of Rehabilitation Medicine in Henan, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Liguo Li
- Institute of Health Engineering, Zhengzhou Health Vocational College, Zhengzhou, China
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Dai N, Tang C, Liu H, Huang S. Effect of electroacupuncture on inhibition of inflammatory response and oxidative stress through activating ApoE and Nrf2 in a mouse model of spinal cord injury. Brain Behav 2021; 11:e2328. [PMID: 34423582 PMCID: PMC8442587 DOI: 10.1002/brb3.2328] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 07/16/2021] [Accepted: 08/02/2021] [Indexed: 12/14/2022] Open
Abstract
INTRODUCTION Electroacupuncture protects neurons and myelinated axons after spinal cord injury by mitigating the inflammatory response and oxidative stress, but how it exerts these effects is unclear. METHODS AND RESULTS Spinal cord injury was induced in C57BL/6 wild-type and apolipoprotein E (ApoE) knockout (ApoE-/- ) mice, followed by electroacupuncture or ApoE mimetic peptide COG112 treatment. Mice with spinal cord injury suffered loss of myelinated axons and hindlimb motor function through the detections of Basso mouse scale, histology, and transmission electron microscopy; electroacupuncture partially reversed these effects in wild-type mice but not in ApoE-/- mice. Combining exogenous ApoE administration with electroacupuncture significantly mitigated the effects of spinal cord injury in both mouse strains, and these effects were associated with up-regulation of anti-inflammatory cytokines and down-regulation of pro-inflammatory cytokines which were detected by quantitative reverse transcription-polymerase chain reaction. Combination treatment also reduced oxidative stress by up-regulating ApoE and Nrf2/HO-1 signaling pathway through the detections of immunofluorescence and western blot analysis. CONCLUSIONS These results suggest that electroacupuncture protects neurons and myelinated axons following spinal cord injury through an ApoE-dependent mechanism.
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Affiliation(s)
- Ni Dai
- Traditional Chinese Medicine College, Chongqing Medical University, Chongqing, China
| | - Chenglin Tang
- Traditional Chinese Medicine College, Chongqing Medical University, Chongqing, China
| | - Hui Liu
- Institute of Neuroscience, Chongqing Medical University, Chongqing, China
| | - Siqin Huang
- Traditional Chinese Medicine College, Chongqing Medical University, Chongqing, China
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Tan C, Yang C, Liu H, Tang C, Huang S. Effect of Schwann cell transplantation combined with electroacupuncture on axonal regeneration and remyelination in rats with spinal cord injury. Anat Rec (Hoboken) 2021; 304:2506-2520. [PMID: 34319000 DOI: 10.1002/ar.24721] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 05/26/2021] [Accepted: 06/16/2021] [Indexed: 11/08/2022]
Abstract
Axonal impairment and demyelination after compressed spinal cord injury lead to serious neurological dysfunction. Increasing studies have suggested that Schwann cells (SCs) transplantation is a reliable, effective, and promising method for treating spinal cord injury. However, single SCs transplantation is insufficient to promote the full recovery of neurological function. Additional approaches are required to support SCs transplantation as a treatment for spinal cord injury. In the study, we investigated whether the combination of electroacupuncture (EA) and SCs transplantation was a reliable intervention for spinal cord injury. We found that rats in the combination group had significantly higher functional locomotor scores than those received single treatment. By immunostaining, we found EA can not only improve survival and proliferation of transplanted SCs but also inhibit SC apoptosis and block the formation of an astrocytic scar. Additionally, EA promoted regenerated axons extending "bullet-shaped" growth cones into the lesion. Remarkably, EA can modify astrogliosis to promote axonal regeneration following SCs transplantation through inducing extension of astrocytic processes in the SCs graft interface. More importantly, the combination of SCs engraftment and EA can enhance corticospinal-tract axonal regeneration and remyelination after spinal cord injury through up-regulating neuregulin 1 type III in SCs and its downstream signaling mediators. Thus, it is concluded that SCs effectively promote axonal recovery after spinal cord injury when combined with EA stimulation. The experimental results have reinforced the theoretical basis of EA for its clinical efficacy in patients with spinal cord injury and merited further investigation for potential clinical application.
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Affiliation(s)
- Chengfang Tan
- Traditional Chinese Medicine College, Chongqing Medical University, Chongqing, China
| | - Cheng Yang
- Traditional Chinese Medicine College, Chongqing Medical University, Chongqing, China
| | - Hui Liu
- Institute of Neuroscience, Chongqing Medical University, Chongqing, China
| | - Chenglin Tang
- Traditional Chinese Medicine College, Chongqing Medical University, Chongqing, China
| | - Siqin Huang
- Traditional Chinese Medicine College, Chongqing Medical University, Chongqing, China
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Yang Y, Xu HY, Deng QW, Wu GH, Zeng X, Jin H, Wang LJ, Lai BQ, Li G, Ma YH, Jiang B, Ruan JW, Wang YQ, Ding Y, Zeng YS. Electroacupuncture facilitates the integration of a grafted TrkC-modified mesenchymal stem cell-derived neural network into transected spinal cord in rats via increasing neurotrophin-3. CNS Neurosci Ther 2021; 27:776-791. [PMID: 33763978 PMCID: PMC8193704 DOI: 10.1111/cns.13638] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 02/21/2021] [Accepted: 02/24/2021] [Indexed: 12/31/2022] Open
Abstract
Aims This study was aimed to investigate whether electroacupuncture (EA) would increase the secretion of neurotrophin‐3 (NT‐3) from injured spinal cord tissue, and, if so, whether the increased NT‐3 would promote the survival, differentiation, and migration of grafted tyrosine kinase C (TrkC)‐modified mesenchymal stem cell (MSC)‐derived neural network cells. We next sought to determine if the latter would integrate with the host spinal cord neural circuit to improve the neurological function of injured spinal cord. Methods After NT‐3‐modified Schwann cells (SCs) and TrkC‐modified MSCs were co‐cultured in a gelatin sponge scaffold for 14 days, the MSCs differentiated into neuron‐like cells that formed a MSC‐derived neural network (MN) implant. On this basis, we combined the MN implantation with EA in a rat model of spinal cord injury (SCI) and performed immunohistochemical staining, neural tracing, electrophysiology, and behavioral testing after 8 weeks. Results Electroacupuncture application enhanced the production of endogenous NT‐3 in damaged spinal cord tissues. The increase in local NT‐3 production promoted the survival, migration, and maintenance of the grafted MN, which expressed NT‐3 high‐affinity TrkC. The combination of MN implantation and EA application improved cortical motor‐evoked potential relay and facilitated the locomotor performance of the paralyzed hindlimb compared with those of controls. These results suggest that the MN was better integrated into the host spinal cord neural network after EA treatment compared with control treatment. Conclusions Electroacupuncture as an adjuvant therapy for TrkC‐modified MSC‐derived MN, acted by increasing the local production of NT‐3, which accelerated neural network reconstruction and restoration of spinal cord function following SCI.
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Affiliation(s)
- Yang Yang
- Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-sen University, Guangzhou, China
| | - Hao-Yu Xu
- Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-sen University, Guangzhou, China
| | - Qing-Wen Deng
- Department of Histology and Embryology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Guo-Hui Wu
- Department of Histology and Embryology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Xiang Zeng
- Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Brain Function and Disease, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Hui Jin
- Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-sen University, Guangzhou, China
| | - Lai-Jian Wang
- Guangdong Provincial Key Laboratory of Brain Function and Disease, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Bi-Qin Lai
- Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-sen University, Guangzhou, China.,Co-innovation Center of Neuroregeneration, Nantong University, Nantong, China
| | - Ge Li
- Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-sen University, Guangzhou, China
| | - Yuan-Huan Ma
- Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-sen University, Guangzhou, China
| | - Bin Jiang
- Guangdong Provincial Key Laboratory of Brain Function and Disease, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Jing-Wen Ruan
- Department of Acupuncture, The 1st Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Ya-Qiong Wang
- Department of Electron Microscope, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Ying Ding
- Department of Histology and Embryology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Yuan-Shan Zeng
- Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-sen University, Guangzhou, China.,Department of Histology and Embryology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Brain Function and Disease, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Co-innovation Center of Neuroregeneration, Nantong University, Nantong, China.,Institute of Spinal Cord Injury, Sun Yat-sen University, Guangzhou, China
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Al Mamun A, Monalisa I, Tul Kubra K, Akter A, Akter J, Sarker T, Munir F, Wu Y, Jia C, Afrin Taniya M, Xiao J. Advances in immunotherapy for the treatment of spinal cord injury. Immunobiology 2020; 226:152033. [PMID: 33321368 DOI: 10.1016/j.imbio.2020.152033] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Revised: 10/19/2020] [Accepted: 11/18/2020] [Indexed: 12/11/2022]
Abstract
Spinal cord injury (SCI) is a leading cause of morbidity and disability in the world. Over the past few decades, the exact molecular mechanisms describing secondary, persistent injuries, as well as primary and transient injuries, have attracted massive attention to the clinicians and researchers. Recent investigations have distinctly shown the critical roles of innate and adaptive immune responses in regulating sterile neuroinflammation and functional outcomes after SCI. In past years, some promising advances in immunotherapeutic options have efficaciously been identified for the treatment of SCI. In our narrative review, we have mainly focused on the new therapeutic strategies such as the maturation and apoptosis of immune cells by several agents, mesenchymal stem cells (MSCs) as well as multi-factor combination therapy, which have recently provided novel ideas and prospects for the future treatment of SCI. This article also illustrates the latest progress in clarifying the potential roles of innate and adaptive immune responses in SCI, the progression and specification of prospective immunotherapy and outstanding issues in the area.
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Affiliation(s)
- Abdullah Al Mamun
- Molecular Pharmacology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, 325035 Zhejiang Province, China
| | - Ilma Monalisa
- Department of Pharmacy, Southeast University, Banani, Dhaka 1213, Bangladesh
| | - Khadija Tul Kubra
- Department of Pharmacy, University of Development Alternative, Dhaka 1209, Bangladesh
| | - Afroza Akter
- Department of Microbiology, Noakhali Science and Technology University, Noakhali 3814, Bangladesh
| | - Jaheda Akter
- Department of Pharmacy, International Islamic University Chittagong, Kumira, Chattogram-4318, Chittagong, Bangladesh
| | - Tamanna Sarker
- Department of Pharmacy, University of Asia Pacific, Dhaka 1205, Bangladesh
| | - Fahad Munir
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000 Zhejiang Province, China
| | - Yanqing Wu
- Institute of Life Sciences, Wenzhou University, Wenzhou, 325035 Zhejiang Province, China
| | - Chang Jia
- Pediatric Research Institute, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, 325027 Zhejiang Province, China
| | - Masuma Afrin Taniya
- Department of Life Sciences, School of Environment and Life Sciences, Independent University, Bangladesh, Dhaka 1229, Bangladesh
| | - Jian Xiao
- Molecular Pharmacology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, 325035 Zhejiang Province, China.
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Effects and Mechanisms of Acupuncture Combined with Mesenchymal Stem Cell Transplantation on Neural Recovery after Spinal Cord Injury: Progress and Prospects. Neural Plast 2020; 2020:8890655. [PMID: 33061954 PMCID: PMC7533022 DOI: 10.1155/2020/8890655] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 08/29/2020] [Accepted: 09/05/2020] [Indexed: 02/07/2023] Open
Abstract
Spinal cord injury (SCI) is a structural event with devastating consequences worldwide. Due to the limited intrinsic regenerative capacity of the spinal cord in adults, the neural restoration after SCI is difficult. Acupuncture is effective for SCI-induced neurologic deficits, and the potential mechanisms responsible for its effects involve neural protection by the inhibition of inflammation, oxidation, and apoptosis. Moreover, acupuncture promotes neural regeneration and axon sprouting by activating multiple cellular signal transduction pathways, such as the Wnt, Notch, and Rho/Rho kinase (ROCK) pathways. Several studies have demonstrated that the efficacy of combining acupuncture with mesenchymal stem cells (MSCs) transplantation is superior to either procedure alone. The advantage of the combined treatment is dependent on the ability of acupuncture to enhance the survival of MSCs, promote their differentiation into neurons, and facilitate targeted migration of MSCs to the spinal cord. Additionally, the differentiation of MSCs into neurons overcomes the problem of the shortage of endogenous neural stem cells (NSCs) in the acupuncture-treated SCI patients. Therefore, the combination of acupuncture and MSCs transplantation could become a novel and effective strategy for the treatment of SCI. Such a possibility needs to be verified by basic and clinical research.
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Tyrosine Kinase Receptors Axl and MerTK Mediate the Beneficial Effect of Electroacupuncture in a Cuprizone-Induced Demyelinating Model. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2020; 2020:3205176. [PMID: 32714402 PMCID: PMC7355344 DOI: 10.1155/2020/3205176] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 05/16/2020] [Accepted: 06/08/2020] [Indexed: 12/13/2022]
Abstract
Electroacupuncture has been shown to promote remyelination in a demyelinating model of multiple sclerosis (MS) through enhanced microglial clearance of degraded myelin debris. However, the mechanisms involved in this process are yet to be clearly elucidated. It has been revealed that TAM receptor tyrosine kinases (Tyro3, Axl, and MerTK) play pivotal roles in regulating multiple features of microglia, including the phagocytic function and myelin clearance. Therefore, the aim of this study is to further confirm whether electroacupuncture improves functional recovery in this model and to characterise the involvement of the TAM receptor during this process. In addition to naive control mice, a cuprizone-induced demyelinating model was established, and long-term electroacupuncture treatment was administrated. To evaluate the efficiency of functional recovery following demyelination, we performed beam-walking test and rotarod performance test; to objectify the degree of remyelination, we performed transmission electron microscopy and protein quantification of mature oligodendrocyte markers. Oil Red O staining was used to evaluate the deposit of myelin debris. We confirmed that, in cuprizone-treated mice, electroacupuncture significantly ameliorates motor-coordinative dysfunction and counteracts demyelinating processes, with less deposit of myelin debris accumulating in the corpus callosum. Surprisingly, mRNA expression of TAM receptors was significantly upregulated after electroacupuncture treatment, and we further confirmed an increased protein expression of Axl and MerTK after electroacupuncture treatment, indicating their involvement during electroacupuncture treatment. Finally, LDC1267, a selective TAM kinase inhibitor, abolished the therapeutic effect of electroacupuncture on motor-coordinative dysfunction. Overall, our data demonstrate that electroacupuncture could mitigate the progression of demyelination by enhancing the TAM receptor expression to facilitate the clearance of myelin debris. Our results also suggest that electroacupuncture may be a potential curative treatment for MS patients.
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Li M, Cui MM, Kenechukwu NA, Gu YW, Chen YL, Zhong SJ, Gao YT, Cao XY, Wang L, Liu FM, Wen XR. Rosmarinic acid ameliorates hypoxia/ischemia induced cognitive deficits and promotes remyelination. Neural Regen Res 2020; 15:894-902. [PMID: 31719255 PMCID: PMC6990785 DOI: 10.4103/1673-5374.268927] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Rosmarinic acid, a common ester extracted from Rosemary, Perilla frutescens, and Salvia miltiorrhiza Bunge, has been shown to have protective effects against various diseases. This is an investigation into whether rosmarinic acid can also affect the changes of white matter fibers and cognitive deficits caused by hypoxic injury. The right common carotid artery of 3-day-old rats was ligated for 2 hours. The rats were then prewarmed in a plastic container with holes in the lid, which was placed in 37°C water bath for 30 minutes. Afterwards, the rats were exposed to an atmosphere with 8% O2 and 92% N2 for 30 minutes to establish the perinatal hypoxia/ischemia injury models. The rat models were intraperitoneally injected with rosmarinic acid 20 mg/kg for 5 consecutive days. At 22 days after birth, rosmarinic acid was found to improve motor, anxiety, learning and spatial memory impairments induced by hypoxia/ischemia injury. Furthermore, rosmarinic acid promoted the proliferation of oligodendrocyte progenitor cells in the subventricular zone. After hypoxia/ischemia injury, rosmarinic acid reversed to some extent the downregulation of myelin basic protein and the loss of myelin sheath in the corpus callosum of white matter structure. Rosmarinic acid partially slowed down the expression of oligodendrocyte marker Olig2 and myelin basic protein and the increase of oligodendrocyte apoptosis marker inhibitors of DNA binding 2. These data indicate that rosmarinic acid ameliorated the cognitive dysfunction after perinatal hypoxia/ischemia injury by improving remyelination in corpus callosum. This study was approved by the Animal Experimental Ethics Committee of Xuzhou Medical University, China (approval No. 20161636721) on September 16, 2017.
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Affiliation(s)
- Man Li
- Department of Genetics, Xuzhou Medical University, Xuzhou, Jiangsu Province, China
| | - Miao-Miao Cui
- Department of Genetics, Xuzhou Medical University, Xuzhou, Jiangsu Province, China
| | | | - Yi-Wei Gu
- Department of Urology, the First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
| | - Yu-Lin Chen
- Department of Genetics, Xuzhou Medical University, Xuzhou, Jiangsu Province, China
| | - Si-Jing Zhong
- Xuzhou Medical University Clinical Medical College, Xuzhou, Jiangsu Province, China
| | - Yu-Ting Gao
- Department of Clinical Laboratory, Xuzhou Medical University, Xuzhou, Jiangsu Province, China
| | - Xue-Yan Cao
- Department of Urology, the First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
| | - Li Wang
- Department of Urology, the First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
| | - Fu-Min Liu
- Department of Genetics, Xuzhou Medical University, Xuzhou, Jiangsu Province, China
| | - Xiang-Ru Wen
- Research Center for Neurobiology and Department of Neurobiology, Xuzhou Medical University, Xuzhou, Jiangsu Province, China
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Yang MX, Chen XN. Rehabilitation of anterior pituitary dysfunction combined with extrapontine myelinolysis: A case report. World J Clin Cases 2019; 7:4420-4425. [PMID: 31911927 PMCID: PMC6940330 DOI: 10.12998/wjcc.v7.i24.4420] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 11/22/2019] [Accepted: 11/30/2019] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Extramedullary myelinolysis is a rare demyelinating disease, often caused by rapid increases in serum sodium concentration in patients with hyponatremia. Clinical manifestations are neuropsychiatric symptoms, limb weakness, and dysarthria. Because of its poor prognosis and high disability rate, it poses a huge burden on the global economy, societies, and families. This article reports rehabilitation in a patient with pituitary dysfunction combined with extramedullary myelinolysis. CASE SUMMARY A 27-year-old Chinese man developed anorexia, vomiting, and limb weakness and was diagnosed with pituitary insufficiency. He had low serum sodium, slow movement, muscle weakness, and muscle tone abnormalities after sodium supplementation, involuntary limb shaking, ataxia, and dysarthria. According to the symptoms and signs and imaging reports, he was diagnosed with extramedullary myelinolysis. After treatment with hormone therapy and neurotrophic drugs, motor and speech function did not improve, so he was treated in the rehabilitation department for 4 wk. The patient's physical status was improved substantially during his stay at the rehabilitation department. CONCLUSION Patients with extramedullary myelinolysis who actively participate in rehabilitation intervention can significantly improve their activities of daily living.
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Affiliation(s)
- Ming-Xuan Yang
- Department of Rehabilitation, Affiliated Hospital of Zunyi Medical University, Zunyi 563003, Guizhou Province, China
| | - Xue-Nong Chen
- Department of Rehabilitation, Affiliated Hospital of Zunyi Medical University, Zunyi 563003, Guizhou Province, China
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Li G, Fan ZK, Gu GF, Jia ZQ, Zhang QQ, Dai JY, He SS. Epidural Spinal Cord Stimulation Promotes Motor Functional Recovery by Enhancing Oligodendrocyte Survival and Differentiation and by Protecting Myelin after Spinal Cord Injury in Rats. Neurosci Bull 2019; 36:372-384. [PMID: 31732865 DOI: 10.1007/s12264-019-00442-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Accepted: 07/23/2019] [Indexed: 02/06/2023] Open
Abstract
Epidural spinal cord stimulation (ESCS) markedly improves motor and sensory function after spinal cord injury (SCI), but the underlying mechanisms are unclear. Here, we investigated whether ESCS affects oligodendrocyte differentiation and its cellular and molecular mechanisms in rats with SCI. ESCS improved hindlimb motor function at 7 days, 14 days, 21 days, and 28 days after SCI. ESCS also significantly increased the myelinated area at 28 days, and reduced the number of apoptotic cells in the spinal white matter at 7 days. SCI decreased the expression of 2',3'-cyclic-nucleotide 3'-phosphodiesterase (CNPase, an oligodendrocyte marker) at 7 days and that of myelin basic protein at 28 days. ESCS significantly upregulated these markers and increased the percentage of Sox2/CNPase/DAPI-positive cells (newly differentiated oligodendrocytes) at 7 days. Recombinant human bone morphogenetic protein 4 (rhBMP4) markedly downregulated these factors after ESCS. Furthermore, ESCS significantly decreased BMP4 and p-Smad1/5/9 expression after SCI, and rhBMP4 reduced this effect of ESCS. These findings indicate that ESCS enhances the survival and differentiation of oligodendrocytes, protects myelin, and promotes motor functional recovery by inhibiting the BMP4-Smad1/5/9 signaling pathway after SCI.
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Affiliation(s)
- Gang Li
- Department of Orthopedics, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, 200072, China
- Spinal Pain Research Institute, Tongji University School of Medicine, Shanghai, 200072, China
| | - Zhong-Kai Fan
- Department of Orthopaedics, The First Affiliated Hospital, Jinzhou Medical University, Jinzhou, 121001, China
| | - Guang-Fei Gu
- Department of Orthopedics, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, 200072, China
- Spinal Pain Research Institute, Tongji University School of Medicine, Shanghai, 200072, China
| | - Zhi-Qiang Jia
- Department of Spinal Surgery, The Second Affiliated Hospital, Henan University of Science and Technology, Luoyang, 471003, China
| | - Qiang-Qiang Zhang
- Department of Orthopaedics, The First Affiliated Hospital, Jinzhou Medical University, Jinzhou, 121001, China
| | - Jun-Yu Dai
- Department of Orthopaedics, The First Affiliated Hospital, Jinzhou Medical University, Jinzhou, 121001, China
| | - Shi-Sheng He
- Department of Orthopedics, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, 200072, China.
- Spinal Pain Research Institute, Tongji University School of Medicine, Shanghai, 200072, China.
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16
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Tian Y, Yin H, Deng X, Tang B, Ren X, Jiang T. CXCL12 induces migration of oligodendrocyte precursor cells through the CXCR4‑activated MEK/ERK and PI3K/AKT pathways. Mol Med Rep 2018; 18:4374-4380. [PMID: 30221695 PMCID: PMC6172403 DOI: 10.3892/mmr.2018.9444] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Accepted: 07/09/2018] [Indexed: 01/18/2023] Open
Abstract
Demyelination is a nervous system disease in which the myelin sheaths of neurons are damaged due to inflammatory reactions, inherited abnormalities or trauma. This damage impairs the conduction of signals in the affected nerves, which in turn causes deficiencies in sensation, movement and cognition. Oligodendrocyte precursor cells (OPCs) are able to induce remyelination. However, the remyelination is suboptimal due to the limited migration of OPCs. In the present study, neonatal OPCs were isolated from rats for the investigation of the role of C-X-C motif chemokine ligand 12 (CXCL12), an important chemokine, in mediating the migration ability of OPCs. The present results demonstrated that CXCL12 stimulation markedly promoted the migration of OPCs and activated the dual specificity mitogen-activated protein kinase kinase 1 (MEK)/extracellular signal-regulated kinase (ERK) and phosphoinositide 3-kinase (PI3K)/RAC-α serine/threonine-protein kinase (AKT) pathways. Knockdown of C-X-C motif chemokine receptor 4 (CXCR4; a receptor of CXCL12) reversed the CXCL12-induced migration of OPCs and blocked the MEK/ERK and PI3K/AKT pathways. In addition, specific inhibitors of the MEK/ERK and PI3K/AKT pathways significantly reduced the migration of OPCs. Based on these findings, it was concluded that CXCL12 may induce the migration of OPCs through the CXCR4-activated MEK/ERK and PI3K/AKT pathways. The results of the present study support the manipulation of CXCL12-mediated OPC migration to improve remyelination.
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Affiliation(s)
- Yongyang Tian
- Department of Orthopedics, Third Military Medical University (Army Medical University), Chongqing 400037, P.R. China
| | - Hong Yin
- Department of Orthopedics, Third Military Medical University (Army Medical University), Chongqing 400037, P.R. China
| | - Xi Deng
- Department of Ultrasound, Xinqiao Hospital, Third Military Medical University (Army Medical University), Chongqing 400037, P.R. China
| | - Beichuan Tang
- Department of Orthopedics, Third Military Medical University (Army Medical University), Chongqing 400037, P.R. China
| | - Xianjun Ren
- Department of Orthopedics, Third Military Medical University (Army Medical University), Chongqing 400037, P.R. China
| | - Tao Jiang
- Department of Orthopedics, Third Military Medical University (Army Medical University), Chongqing 400037, P.R. China
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Cai W, Shen WD. Anti-Apoptotic Mechanisms of Acupuncture in Neurological Diseases: A Review. THE AMERICAN JOURNAL OF CHINESE MEDICINE 2018; 46:515-535. [PMID: 29595076 DOI: 10.1142/s0192415x1850026x] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Apoptosis, known as programmed cell death, plays a significant role in the pathogenesis of neurological diseases. Most of these diseases can be obviously alleviated by means of acupuncture treatment. Current research studies have shown that the efficacy of acupuncture to these medical conditions is closely associated with the anti-apoptotic potentials. Mainly based on the acupuncture's anti-apoptotic efficacy in prevalent neurological disorders, including cerebral ischemia-reperfusion injury, Alzheimer's disease, depression or stress related-modes, spinal cord injuries, etc., this review comes to a conclusion that the anti-apoptotic effect of acupuncture treatment for neurological diseases, evidently reflected through Bcl-2, Bax or caspase expression change, results from regulating mitochondrial or autophagic dysfunction as well as reducing oxidative stress and inflammation. The possible mechanisms of acupuncture's anti-apoptotic effect are associated with a series of downstream signaling pathways and the up-regulated expression of neurotrophic factors. It is of great importance to illuminate the exact mechanisms of acupuncture treatment for neurological dysfunctions.
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Affiliation(s)
- Wa Cai
- 1 Department of Acupuncture, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, P. R. China
| | - Wei-Dong Shen
- 1 Department of Acupuncture, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, P. R. China
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Li L, Li F, Yin J, Pan B, Yu QP, Cai X, Huang HY, Chen A. Establishment and Evaluation of a Rat Model of Spinal Cord Injury with the Pathopattern of Qi-Deficiency and Blood-Stasis in Traditional Chinese Medicine. DIGITAL CHINESE MEDICINE 2018. [DOI: 10.1016/s2589-3777(19)30012-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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19
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Pak ME, Jung DH, Lee HJ, Shin MJ, Kim SY, Shin YB, Yun YJ, Shin HK, Choi BT. Combined therapy involving electroacupuncture and treadmill exercise attenuates demyelination in the corpus callosum by stimulating oligodendrogenesis in a rat model of neonatal hypoxia-ischemia. Exp Neurol 2017; 300:222-231. [PMID: 29199131 DOI: 10.1016/j.expneurol.2017.11.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 11/09/2017] [Accepted: 11/29/2017] [Indexed: 01/09/2023]
Abstract
We investigated whether electroacupuncture (EA) and treadmill (TM) exercise improve behaviors related to motor and memory dysfunction in a cerebral palsy-like rat model via activation of oligodendrogenesis. A neonatal hypoxia-ischemia model was created using Sprague-Dawley rats (P7), and these underwent EA stimulation and treadmill training from 3 to 5weeks after hypoxia-ischemia induction. EA treatment was delivered via electrical stimulation (2Hz, 1mA) at two acupoints, Baihui (GV20) and Zusanli (ST36). Behavioral tests showed that EA alleviated motor dysfunction caused by hypoxia-ischemia on a rotarod test, and TM exercise alleviated motor and memory dysfunction seen on cylinder and passive avoidance tests. Combined therapy with EA and TM exercise showed synergistic effects on the cylinder, rotarod, and catwalk tests. TM exercise significantly restored corpus callosum thickness, and combined therapy with EA and TM restored myelin basic protein (MBP) levels in this region. While EA stimulation only increased activation of cAMP-response element binging protein (CREB) in oligodendrocytes of the corpus callosum, TM exercise increased newly generated oligodendrocyte progenitor cells or oligodendrocytes via activation of CREB. Synergistic effects on oligodendrogenesis were also observed by the combined therapy. Furthermore, the combined therapy induced mature brain-derived neurotrophic factor (BDNF) expression in the cerebral cortex. These results demonstrate that combined therapy with EA and TM exercise may restore myelin components following neonatal hypoxia-ischemia via upregulation of oligodendrogenesis involving CREB/BDNF signaling, which subsequently improves motor and memory function. Therefore, combined therapy with EA and TM exercise offers another treatment option for functional recovery from injuries caused by neonatal hypoxia-ischemia, such as cerebral palsy.
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Affiliation(s)
- Malk Eun Pak
- Department of Korean Medical Science, School of Korean Medicine, Pusan National University, Yangsan 50612, Republic of Korea; Graduate Training Program of Korean Medicine for Healthy-aging, School of Korean Medicine, Pusan National University, Yangsan 50612, Republic of Korea
| | - Da Hee Jung
- Department of Korean Medical Science, School of Korean Medicine, Pusan National University, Yangsan 50612, Republic of Korea; Graduate Training Program of Korean Medicine for Healthy-aging, School of Korean Medicine, Pusan National University, Yangsan 50612, Republic of Korea
| | - Hong Ju Lee
- Department of Korean Medical Science, School of Korean Medicine, Pusan National University, Yangsan 50612, Republic of Korea; Graduate Training Program of Korean Medicine for Healthy-aging, School of Korean Medicine, Pusan National University, Yangsan 50612, Republic of Korea
| | - Myung Jun Shin
- Department of Rehabilitation Medicine, School of Medicine, Pusan National University, Busan 49241, Republic of Korea; Biomedical Research Institute, Pusan National University Hospital, Busan 49241, Republic of Korea
| | - Soo-Yeon Kim
- Department of Rehabilitation Medicine, Pusan National University Yangsan Hospital, Yangsan 50612, Republic of Korea; Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan 50612, Republic of Korea
| | - Yong Beom Shin
- Department of Rehabilitation Medicine, School of Medicine, Pusan National University, Busan 49241, Republic of Korea; Biomedical Research Institute, Pusan National University Hospital, Busan 49241, Republic of Korea
| | - Young Ju Yun
- Department of Integrative Medicine, School of Korean Medicine, Pusan National University, Yangsan 50612, Republic of Korea
| | - Hwa Kyoung Shin
- Department of Korean Medical Science, School of Korean Medicine, Pusan National University, Yangsan 50612, Republic of Korea; Graduate Training Program of Korean Medicine for Healthy-aging, School of Korean Medicine, Pusan National University, Yangsan 50612, Republic of Korea; Korean Medical Science Research Center for Healthy-Aging, Pusan National University, Yangsan 50612, Republic of Korea
| | - Byung Tae Choi
- Department of Korean Medical Science, School of Korean Medicine, Pusan National University, Yangsan 50612, Republic of Korea; Graduate Training Program of Korean Medicine for Healthy-aging, School of Korean Medicine, Pusan National University, Yangsan 50612, Republic of Korea; Korean Medical Science Research Center for Healthy-Aging, Pusan National University, Yangsan 50612, Republic of Korea.
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20
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Wang HF, Liu XK, Li R, Zhang P, Chu Z, Wang CL, Liu HR, Qi J, Lv GY, Wang GY, Liu B, Li Y, Wang YY. Effect of glial cells on remyelination after spinal cord injury. Neural Regen Res 2017; 12:1724-1732. [PMID: 29171439 PMCID: PMC5696855 DOI: 10.4103/1673-5374.217354] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/14/2017] [Indexed: 12/21/2022] Open
Abstract
Remyelination plays a key role in functional recovery of axons after spinal cord injury. Glial cells are the most abundant cells in the central nervous system. When spinal cord injury occurs, many glial cells at the lesion site are immediately activated, and different cells differentially affect inflammatory reactions after injury. In this review, we aim to discuss the core role of oligodendrocyte precursor cells and crosstalk with the rest of glia and their subcategories in the remyelination process. Activated astrocytes influence proliferation, differentiation, and maturation of oligodendrocyte precursor cells, while activated microglia alter remyelination by regulating the inflammatory reaction after spinal cord injury. Understanding the interaction between oligodendrocyte precursor cells and the rest of glia is necessary when designing a therapeutic plan of remyelination after spinal cord injury.
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Affiliation(s)
- Hai-feng Wang
- Department of Neurosurgery, First Hospital of Jilin University, Changchun, Jilin Province, China
| | - Xing-kai Liu
- Department of Hepatobiliary and Pancreas Surgery, First Hospital of Jilin University, Changchun, Jilin Province, China
| | - Rui Li
- Hand & Foot Surgery and Reparative & Reconstruction Surgery Center, Second Hospital of Jilin University, Changchun, Jilin Province, China
| | - Ping Zhang
- Department of Hepatobiliary and Pancreas Surgery, First Hospital of Jilin University, Changchun, Jilin Province, China
| | - Ze Chu
- Department of Emergency, First Hospital of Jilin University, Changchun, Jilin Province, China
| | - Chun-li Wang
- Department of Hepatobiliary and Pancreas Surgery, First Hospital of Jilin University, Changchun, Jilin Province, China
| | - Hua-rui Liu
- Department of Hepatobiliary and Pancreas Surgery, First Hospital of Jilin University, Changchun, Jilin Province, China
| | - Jun Qi
- Department of Hepatobiliary and Pancreas Surgery, First Hospital of Jilin University, Changchun, Jilin Province, China
| | - Guo-yue Lv
- Department of Hepatobiliary and Pancreas Surgery, First Hospital of Jilin University, Changchun, Jilin Province, China
| | - Guang-yi Wang
- Department of Hepatobiliary and Pancreas Surgery, First Hospital of Jilin University, Changchun, Jilin Province, China
| | - Bin Liu
- Department of Cardiology, First Hospital of Jilin University, Changchun, Jilin Province, China
| | - Yan Li
- Department of Surgery, School of Medicine, University of Louisville, Louisville, KY, USA
| | - Yuan-yi Wang
- Department of Orthopedics, First Hospital of Jilin University, Changchun, Jilin Province, China
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Escobar-Corona C, Torres-Castillo S, Rodríguez-Torres EE, Segura-Alegría B, Jiménez-Estrada I, Quiroz-González S. Electroacupuncture improves gait locomotion, H-reflex and ventral root potentials of spinal compression injured rats. Brain Res Bull 2017; 131:7-17. [PMID: 28274815 DOI: 10.1016/j.brainresbull.2017.02.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Revised: 02/07/2017] [Accepted: 02/23/2017] [Indexed: 02/06/2023]
Abstract
This study explored the effect of electroacupuncture stimulation (EA) on alterations in the Hoffman reflex (H-reflex) response and gait locomotion provoked by spinal cord injury (SCI) in the rat. A compression lesion of the spinal cord was evoked by insufflating a Fogarty balloon located in the epidural space at the T8-9 spinal level of adult Wistar male rats (200-250 gr; n=60). In different groups of SCI rats, EA (frequencies: 2, 50 and 100Hz) was applied simultaneously to Huantiao (GB30), Yinmen (BL37), Jizhong (GV6) and Zhiyang (GV9) acupoints from the third post-injury day until the experimental session. At 1, 2, 3 and 4 post-injury weeks, the BBB scores of the SCI group of rats treated with EA at 50Hz showed a gradual but greater enhancement of locomotor activity than the other groups of rats. Unrestrained gait kinematic analysis of SCI rats treated with EA-50Hz stimulation showed a significant improvement in stride duration, length and speed (p<0.05), whereas a discrete recovery of gait locomotion was observed in the other groups of animals. After four post-injury weeks, the H-reflex amplitude and H-reflex/M wave amplitude ratio obtained in SCI rats had a noticeable enhancement (217%) compared to sham rats (n=10). Meanwhile, SCI rats treated with EA at 50Hz manifested a decreased facilitation of the H-reflex amplitude and H/M amplitude ratio (154%) and a reduced frequency-dependent amplitude depression of the H-reflex (66%). In addition, 50 Hz-EA treatment induced a recovery of the presynaptic depression of the Gs-VRP evoked by PBSt conditioning stimulation in the SCI rat (63.2±8.1%; n=9). In concordance with the latter, it could be suggested that 50 Hz-EA stimulation reduced the hyper-excitability of motoneurons and provokes a partial improvement of the locomotive performance and H reflex responses by a possible recovery of presynaptic mechanisms in the spinal cord of experimentally injured rats.
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Affiliation(s)
- Carlos Escobar-Corona
- Department of Acupuncture and Rehabilitation, State University of Ecatepec Valley, Av. Central s/n, Esq. Leona Vicario, Col. Valle de Anáhuac, Secc. "A", C.P. 55210, Ecatepec Estado de Mexico, Mexico.
| | - Sergio Torres-Castillo
- Department of Acupuncture and Rehabilitation, State University of Ecatepec Valley, Av. Central s/n, Esq. Leona Vicario, Col. Valle de Anáhuac, Secc. "A", C.P. 55210, Ecatepec Estado de Mexico, Mexico.
| | | | | | - Ismael Jiménez-Estrada
- Department of Physiology, Biophysics and Neuroscience, Center for Research and Advanced Studies, Av. Instituto Politécnico Nacional 2508, Col. San Pedro Zacatenco, AP. 14-740, Mexico City, D.F. CP 07000, Mexico.
| | - Salvador Quiroz-González
- Department of Acupuncture and Rehabilitation, State University of Ecatepec Valley, Av. Central s/n, Esq. Leona Vicario, Col. Valle de Anáhuac, Secc. "A", C.P. 55210, Ecatepec Estado de Mexico, Mexico.
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Fang B, Qin M, Li Y, Li X, Tan W, Zhang Y, Ma H. Electroacupuncture preconditioning and postconditioning inhibit apoptosis and neuroinflammation induced by spinal cord ischemia reperfusion injury through enhancing autophagy in rats. Neurosci Lett 2017; 642:136-141. [PMID: 28188848 DOI: 10.1016/j.neulet.2017.02.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2016] [Revised: 11/11/2016] [Accepted: 02/06/2017] [Indexed: 12/18/2022]
Abstract
Electroacupuncture (EA) has beneficial effects on spinal cord ischemia reperfusion (I/R) injury, but the underlying mechanisms are not fully understood. This study aimed to investigate the role of autophagy in the protection of EA preconditioning and postconditioning against spinal cord I/R injury. For this, spinal cord I/R injury was induced by 14min occlusion of the aortic arch, and rats were treated with EA for 20min before or after the surgery. The expression of autophagy components, light chain 3 and Beclin 1, was assessed by Western blot. The hind-limb motor function was assessed using the Basso-Beattie-Bresnahan (BBB) criteria, and motor neurons in the ventral gray matter were counted by histological examination. The apoptosis of neurocyte was assessed by the terminal deoxynucleotidyl transferase-mediated dUTP-biotin nick end labeling (TUNEL) assay. The expression of tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β), and matrix metalloproteinase-9 (MMP-9) was also measured using Western blot or enzyme-linked immunosorbent assay (ELISA). Either EA preconditioning or postconditioning enhanced autophagy, and minimized the neuromotor dysfunction and histopathological deficits after spinal cord I/R injury. In addition, EA suppressed I/R-induced apoptosis and increased in the expression of TNF-α, IL-1β, and MMP-9. In contrast, the autophagic inhibitor (3-methyladenine, 3-MA) inhibited the neuroprotective effects of EA. Moreover, 3-MA increased the apoptosis and the expression of TNF-α, IL-1β, and MMP-9. In summary, these findings suggested that EA preconditioning and postconditioning could alleviate spinal cord I/R injury, which was partly mediated by autophagy upregulation-induced inhibition of apoptosis and neuroinflammation.
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Affiliation(s)
- Bo Fang
- Department of Anesthesiology, First Affiliated Hospital, China Medical University, North Nanjing Street, No. 155, Shenyang, Liaoning, PR China.
| | - Meiman Qin
- Department of Anesthesiology, First Affiliated Hospital, China Medical University, North Nanjing Street, No. 155, Shenyang, Liaoning, PR China
| | - Yun Li
- Department of Anesthesiology, First Affiliated Hospital, China Medical University, North Nanjing Street, No. 155, Shenyang, Liaoning, PR China
| | - Xiaoqian Li
- Department of Anesthesiology, First Affiliated Hospital, China Medical University, North Nanjing Street, No. 155, Shenyang, Liaoning, PR China
| | - Wenfei Tan
- Department of Anesthesiology, First Affiliated Hospital, China Medical University, North Nanjing Street, No. 155, Shenyang, Liaoning, PR China
| | - Ying Zhang
- Department of Anesthesiology, First Affiliated Hospital, China Medical University, North Nanjing Street, No. 155, Shenyang, Liaoning, PR China
| | - Hong Ma
- Department of Anesthesiology, First Affiliated Hospital, China Medical University, North Nanjing Street, No. 155, Shenyang, Liaoning, PR China
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Zhu K, Sun J, Kang Z, Zou Z, Wu G, Wang J. Electroacupuncture Promotes Remyelination after Cuprizone Treatment by Enhancing Myelin Debris Clearance. Front Neurosci 2017; 10:613. [PMID: 28119561 PMCID: PMC5222794 DOI: 10.3389/fnins.2016.00613] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Accepted: 12/26/2016] [Indexed: 12/13/2022] Open
Abstract
Promoting remyelination is crucial for patients with demyelinating diseases including multiple sclerosis. However, it is still a circuitous conundrum finding a practical remyelinating therapy. Electroacupuncture (EA), originating from traditional Chinese medicine (TCM), has been widely used to treat CNS diseases all over the world, but the role of EA in demyelinating diseases is barely known. In this study, we examined the remyelinating properties and mechanisms of EA in cuprizone-induced demyelinating model, a CNS demyelinating murine model of multiple sclerosis. By feeding C57BL/6 mice with chow containing 0.2% cuprizone for 5 weeks, we successfully induce demyelination as proved by weight change, beam test, pole test, histomorphology, and Western Blot. EA treatment significantly improves the neurobehavioral performance at week 7 (2 weeks after withdrawing cuprizone chow). RNA-seq and RT-PCR results reveal up-regulated expression of myelin-related genes, and the expression of myelin associated protein (MBP, CNPase, and O4) are also increased after EA treatment, indicating therapeutic effect of EA on cuprizone model. It is widely acknowledged that microglia exert phagocytic effect on degraded myelin debris and clear these detrimental debris, which is a necessary process for subsequent remyelination. We found the remyelinating effect of EA is associated with enhanced clearance of degraded myelin debris as detected by dMBP staining and red oil O staining. Our further studies suggest that more microglia assemble in demyelinating area (corpus callosum) during the process of EA treatment, and cells inside corpus callosum are mostly in a plump, ameboid, and phagocytic shape, quite different from the ramified cells outside corpus callosum. RNA-seq result also unravels that most genes relating to positive regulation of phagocytosis (GO:0050766) are up-regulated, indicating enhanced phagocytic process after EA treatment. During the process of myelin debris clearance, microglia tend to change their phenotype toward M2 phenotype. Thus, we also probed into the phenotype of microglia in our study. Immuno-staining results show increased expression of CD206 and Arg1, and the ratio of CD206/CD16/32 are also higher in EA group. In conclusion, these results demonstrate for the first time that EA enhances myelin debris removal from activated microglia after demyelination, and promotes remyelination.
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Affiliation(s)
- Keying Zhu
- Department of Integrative Medicine and Neurobiology, School of Basic Medical Sciences, Shanghai Medical College, Fudan UniversityShanghai, China; State Key Laboratory of Medical Neurobiology, Collaborative Innovation Center for Brain Science, Institutes of Brain Science, Fudan UniversityShanghai, China; Academy of Integrative Medicine, Fudan UniversityShanghai, China
| | - Jingxian Sun
- Department of Integrative Medicine and Neurobiology, School of Basic Medical Sciences, Shanghai Medical College, Fudan UniversityShanghai, China; State Key Laboratory of Medical Neurobiology, Collaborative Innovation Center for Brain Science, Institutes of Brain Science, Fudan UniversityShanghai, China; Academy of Integrative Medicine, Fudan UniversityShanghai, China
| | - Zheng Kang
- Department of Integrative Medicine and Neurobiology, School of Basic Medical Sciences, Shanghai Medical College, Fudan UniversityShanghai, China; State Key Laboratory of Medical Neurobiology, Collaborative Innovation Center for Brain Science, Institutes of Brain Science, Fudan UniversityShanghai, China; Academy of Integrative Medicine, Fudan UniversityShanghai, China
| | - Zaofeng Zou
- Department of Integrative Medicine and Neurobiology, School of Basic Medical Sciences, Shanghai Medical College, Fudan UniversityShanghai, China; State Key Laboratory of Medical Neurobiology, Collaborative Innovation Center for Brain Science, Institutes of Brain Science, Fudan UniversityShanghai, China; Academy of Integrative Medicine, Fudan UniversityShanghai, China
| | - Gencheng Wu
- Department of Integrative Medicine and Neurobiology, School of Basic Medical Sciences, Shanghai Medical College, Fudan UniversityShanghai, China; State Key Laboratory of Medical Neurobiology, Collaborative Innovation Center for Brain Science, Institutes of Brain Science, Fudan UniversityShanghai, China; Academy of Integrative Medicine, Fudan UniversityShanghai, China
| | - Jun Wang
- Department of Integrative Medicine and Neurobiology, School of Basic Medical Sciences, Shanghai Medical College, Fudan UniversityShanghai, China; State Key Laboratory of Medical Neurobiology, Collaborative Innovation Center for Brain Science, Institutes of Brain Science, Fudan UniversityShanghai, China; Academy of Integrative Medicine, Fudan UniversityShanghai, China
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24
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Li N, Leung GKK. Oligodendrocyte Precursor Cells in Spinal Cord Injury: A Review and Update. BIOMED RESEARCH INTERNATIONAL 2015; 2015:235195. [PMID: 26491661 PMCID: PMC4600489 DOI: 10.1155/2015/235195] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Revised: 06/19/2015] [Accepted: 06/25/2015] [Indexed: 12/20/2022]
Abstract
Spinal cord injury (SCI) is a devastating condition to individuals, families, and society. Oligodendrocyte loss and demyelination contribute as major pathological processes of secondary damages after injury. Oligodendrocyte precursor cells (OPCs), a subpopulation that accounts for 5 to 8% of cells within the central nervous system, are potential sources of oligodendrocyte replacement after SCI. OPCs react rapidly to injuries, proliferate at a high rate, and can differentiate into myelinating oligodendrocytes. However, posttraumatic endogenous remyelination is rarely complete, and a better understanding of OPCs' characteristics and their manipulations is critical to the development of novel therapies. In this review, we summarize known characteristics of OPCs and relevant regulative factors in both health and demyelinating disorders including SCI. More importantly, we highlight current evidence on post-SCI OPCs transplantation as a potential treatment option as well as the impediments against regeneration. Our aim is to shed lights on important knowledge gaps and to provoke thoughts for further researches and the development of therapeutic strategies.
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Affiliation(s)
- Ning Li
- Department of Surgery, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Queen Mary Hospital, Pokfulam, Hong Kong
| | - Gilberto K. K. Leung
- Department of Surgery, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Queen Mary Hospital, Pokfulam, Hong Kong
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