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Study on Neuroprotective Mechanism of Houshiheisan in Ischemic Stroke Based on Transcriptomics and Experimental Verification. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2023; 2023:8673136. [PMID: 36793760 PMCID: PMC9925249 DOI: 10.1155/2023/8673136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 01/05/2023] [Accepted: 01/09/2023] [Indexed: 02/09/2023]
Abstract
Houshiheisan (HSHS), a classic prescription in traditional Chinese medicine (TCM), has shown outstanding efficacy in treating stroke. This study investigated various therapeutic targets of HSHS for ischemic stroke using mRNA transcriptomics. Herein, rats were randomly separated into the sham, model, HSHS 5.25 g/kg (HSHS5.25), and HSHS 10.5 g/kg (HSHS10.5) groups. Rats suffering from stroke were induced by permanent middle cerebral artery occlusion (pMCAO). After seven days of HSHS treatment, behavioral tests were conducted, and histological damage was examined with hematoxylin-eosin (HE). The mRNA expression profiles were identified using microarray analysis and quantitative real-time PCR (qRT-PCR) validated gene expression changes. An analysis of gene ontology and pathway enrichment was conducted to analyze potential mechanisms confirmed using immunofluorescence and western blotting. HSHS5.25 and HSHS10.5 improved neurological deficits and pathological injury in pMCAO rats. The intersections of 666 differentially expressed genes (DEGs) were chosen using transcriptomics analysis in the sham, model, and HSHS10.5 groups. The enrichment analysis suggested that the therapeutic targets of HSHS might regulate the apoptotic process and ERK1/2 signaling pathway, which was related to neuronal survival. Moreover, TUNEL and immunofluorescence analysis indicated that HSHS inhibited apoptosis and enhanced neuronal survival in the ischemic lesion. Western blot and immunofluorescence assay indicated that HSHS10.5 decreased Bax/Bcl-2 ratio and suppressed caspase-3 activation, while the phosphorylation of ERK1/2 and CREB was upregulated in a stroke rat model after HSHS treatment. Effective inhibition of neuronal apoptosis by activating the ERK1/2-CREB signaling pathway may be a potential mechanism for HSHS in the treatment of ischemic stroke.
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Koo B, Weiland JD. Progressive Retinal Degeneration Increases Cortical Response Latency of Light Stimulation but Not of Electric Stimulation. Transl Vis Sci Technol 2022; 11:19. [PMID: 35446408 PMCID: PMC9034728 DOI: 10.1167/tvst.11.4.19] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Accepted: 03/31/2022] [Indexed: 12/02/2022] Open
Abstract
Purpose The brain is known to change functionally and structurally in response to blindness, but less is known about the effects of restoration of cortical input on brain function. Here, we present a preliminary study to observe alterations in visual and electrical evoked cortical potentials as a function of age in a clinically relevant animal model of retinitis pigmentosa. Methods We recorded brain potentials elicited by light (visual evoked potentials [VEPs]) or corneal electrical stimulation (electrical evoked response [EER]) in retinal degenerate animal model LE-P23H-1. We used a linear mixed model to examine the effects of age on latency and amplitude of VEP and EER age groups P120, P180, and P360. Results VEP N1, P1, and N2 latency and amplitude were analyzed across animal age. For 1 Hz VEP, N1 latency increased significantly with animal age (slope = 0.053 ± 0.020 ms/day, P < 0.01). For 10 Hz VEP, N1, P1, and N2 latency increased significantly with animal age (slope = 0.104 ± 0.011, 0.135 ± 0.011, 0.087 ± 0.023 ms/day, and P < 0.001 for all VEP peaks). Conversely, EER latency did not change with age. Signal amplitude of VEP or EER did not change with age. Conclusions Cortical potentials evoked by electrical stimulation of the retina do not diminish in spite of continued retinal degeneration in P23H rats. Translational Relevance These findings suggest that retinal bioelectronic treatments of retinitis pigmentosa will activate cortex consistently despite variations in outer retinal degeneration. Clinical studies of retinal stimulation should consider varying retinitis pigmentosa genotypes as part of the experimental design.
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Affiliation(s)
- Beomseo Koo
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA
- Biointerfaces Institute, University of Michigan, Ann Arbor, MI, USA
| | - James D. Weiland
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA
- Biointerfaces Institute, University of Michigan, Ann Arbor, MI, USA
- Department of Ophthalmology and Visual Sciences, University of Michigan, Ann Arbor, MI, USA
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Kim K, Yoo SJ, Kim SY, Lee T, Lim SH, Jang JE, Je M, Moon C, Choi JW. Subthreshold electrical stimulation as a low power electrical treatment for stroke rehabilitation. Sci Rep 2021; 11:14048. [PMID: 34234199 PMCID: PMC8263745 DOI: 10.1038/s41598-021-93354-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 06/18/2021] [Indexed: 11/09/2022] Open
Abstract
As a promising future treatment for stroke rehabilitation, researchers have developed direct brain stimulation to manipulate the neural excitability. However, there has been less interest in energy consumption and unexpected side effect caused by electrical stimulation to bring functional recovery for stroke rehabilitation. In this study, we propose an engineering approach with subthreshold electrical stimulation (STES) to bring functional recovery. Here, we show a low level of electrical stimulation boosted causal excitation in connected neurons and strengthened the synaptic weight in a simulation study. We found that STES with motor training enhanced functional recovery after stroke in vivo. STES was shown to induce neural reconstruction, indicated by higher neurite expression in the stimulated regions and correlated changes in behavioral performance and neural spike firing pattern during the rehabilitation process. This will reduce the energy consumption of implantable devices and the side effects caused by stimulating unwanted brain regions.
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Affiliation(s)
- Kyungsoo Kim
- Brain Engineering Convergence Research Center, Daegu Gyeongbuk Institute of Science and Technology, Daegu, Korea
| | - Seung-Jun Yoo
- Department of Brain and Cognitive Sciences, Daegu Gyeongbuk Institute of Science and Technology, Daegu, Korea
| | - So Yeon Kim
- Convergence Research Advanced Centre for Olfaction, Daegu Gyeongbuk Institute of Science and Technology, Daegu, Korea.,Department of Brain and Cognitive Sciences, Daegu Gyeongbuk Institute of Science and Technology, Daegu, Korea
| | - Taeju Lee
- Department of Electrical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Korea
| | - Sung-Ho Lim
- Brain Engineering Convergence Research Center, Daegu Gyeongbuk Institute of Science and Technology, Daegu, Korea
| | - Jae-Eun Jang
- Department of Information and Communication Engineering, Daegu Gyeongbuk Institute of Science and Technology, Daegu, Korea
| | - Minkyu Je
- Department of Electrical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Korea
| | - Cheil Moon
- Brain Engineering Convergence Research Center, Daegu Gyeongbuk Institute of Science and Technology, Daegu, Korea. .,Convergence Research Advanced Centre for Olfaction, Daegu Gyeongbuk Institute of Science and Technology, Daegu, Korea. .,Department of Brain and Cognitive Sciences, Daegu Gyeongbuk Institute of Science and Technology, Daegu, Korea.
| | - Ji-Woong Choi
- Brain Engineering Convergence Research Center, Daegu Gyeongbuk Institute of Science and Technology, Daegu, Korea. .,Department of Information and Communication Engineering, Daegu Gyeongbuk Institute of Science and Technology, Daegu, Korea.
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4
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Invasive cortical stimulation. INTERNATIONAL REVIEW OF NEUROBIOLOGY 2021; 159:23-45. [PMID: 34446248 DOI: 10.1016/bs.irn.2021.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The field of neuromodulation, at its essence, aims to apply electrical stimulation to the brain to ameliorate various pathology. Many methods of applying this stimulation exist, including invasive and non-invasive means. In the realm of invasive stimulation, stimulation of the cortex remains one of the earliest techniques investigated, yet one of the most underutilized today. Evidence for the efficacy of direct invasive cortical stimulation continues to mount, especially in recent years. In this chapter we will review the evidence for the use of invasive cortical stimulation as it applies to neuropathic pain, epilepsy, psychiatric disease, movement disorders, tinnitus, and post-stroke recovery, as well explore some potential mechanisms and future directions of the technique.
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Schönfeld LM, Jahanshahi A, Lemmens E, Bauwens M, Hescham SA, Schipper S, Lagiere M, Hendrix S, Temel Y. Motor cortex stimulation does not lead to functional recovery after experimental cortical injury in rats. Restor Neurol Neurosci 2018; 35:295-305. [PMID: 28506001 DOI: 10.3233/rnn-160703] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Motor impairments are among the major complications that develop after cortical damage caused by either stroke or traumatic brain injury. Motor cortex stimulation (MCS) can improve motor functions in animal models of stroke by inducing neuroplasticity. OBJECTIVE In the current study, the therapeutic effect of chronic MCS was assessed in a rat model of severe cortical damage. METHODS A controlled cortical impact (CCI) was applied to the forelimb area of the motor cortex followed by implantation of a flat electrode covering the lesioned area. Forelimb function was assessed using the Montoya staircase test and the cylinder test before and after a period of chronic MCS. Furthermore, the effect of MCS on tissue metabolism and lesion size was measured using [18F]-fluorodesoxyglucose (FDG) μPET scanning. RESULTS CCI caused a considerable lesion at the level of the motor cortex and dorsal striatum together with a long-lasting behavioral phenotype of forelimb impairment. However, MCS applied to the CCI lesion did not lead to any improvement in limb functioning when compared to non-stimulated control rats. Also, MCS neither changed lesion size nor distribution of FDG. CONCLUSION The use of MCS as a standalone treatment did not improve motor impairments in a rat model of severe cortical damage using our specific treatment modalities.
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Affiliation(s)
- Lisa-Maria Schönfeld
- Department of Neuroscience, Maastricht University, Maastricht, The Netherlands.,Department of Morphology, Biomedical Research Institute (BIOMED), Hasselt University, Hasselt, Belgium
| | - Ali Jahanshahi
- Department of Neuroscience, Maastricht University, Maastricht, The Netherlands.,Department of Neurosurgery, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Evi Lemmens
- Department of Morphology, Biomedical Research Institute (BIOMED), Hasselt University, Hasselt, Belgium
| | - Matthias Bauwens
- Department of Nuclear Medicine, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Sarah-Anna Hescham
- Department of Neuroscience, Maastricht University, Maastricht, The Netherlands
| | - Sandra Schipper
- Department of Neuroscience, Maastricht University, Maastricht, The Netherlands.,Department of Neurology, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Melanie Lagiere
- Department of Neuroscience, Maastricht University, Maastricht, The Netherlands
| | - Sven Hendrix
- Department of Morphology, Biomedical Research Institute (BIOMED), Hasselt University, Hasselt, Belgium
| | - Yasin Temel
- Department of Neuroscience, Maastricht University, Maastricht, The Netherlands.,Department of Neurosurgery, Maastricht University Medical Center, Maastricht, The Netherlands
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Zheng ZT, Dong XL, Li YD, Gao WW, Zhou Y, Jiang RC, Yue SY, Zhou ZW, Zhang JN. Electrical stimulation improved cognitive deficits associated with traumatic brain injury in rats. Brain Behav 2017; 7:e00667. [PMID: 29201537 PMCID: PMC5698854 DOI: 10.1002/brb3.667] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Revised: 12/29/2016] [Accepted: 01/26/2017] [Indexed: 01/01/2023] Open
Abstract
INTRODUCTION Cognitive deficits associated with traumatic brain injury (TBI) reduce patient quality of life. However, to date, there have been no effective treatments for TBI-associated cognitive deficits. In this study, we aimed to determine whether electrical stimulation (ES) improves cognitive deficits in TBI rats. METHODS Rats were randomly divided into three groups: the Sham control group, electrical stimulation group (ES group), and No electrical stimulation control group (N-ES group). Following fluid percussion injury, the rats in the ES group received ES treatment for 3 weeks. Potent cognitive function-relevant factors, including the escape latency, time percentage in the goal quadrant, and numbers of CD34+ cells, von Willebrand Factor+ (vWF +) vessels, and circulating endothelial progenitor cells (EPCs), were subsequently assessed using the Morris water maze (MWM) test, immunohistochemical staining, and flow cytometry. RESULTS Compared with the rats in the N-ES group, the rats in the ES group exhibited a shorter escape latency on day 3 (p = .025), day 4 (p = .011), and day 5 (p = .003), as well as a higher time percentage in the goal quadrant (p = .025) in the MWM test. After 3 weeks of ES, there were increased numbers of CD34+ cells (p = .008) and vWF + vessels (p = .000) in the hippocampus of injured brain tissue in the ES group compared with those in the N-ES group. Moreover, ES also significantly increased the number of EPCs in the peripheral blood from days 3 to 21 after TBI in the ES group (p < .05). CONCLUSIONS Taken together, these findings suggest that ES may improve cognitive deficits induced by TBI, and this protective effect may be a result, in part, of enhanced angiogenesis, which may be attributed to the increased mobilization of EPCs in peripheral blood.
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Affiliation(s)
- Zhi-Tong Zheng
- Department of Neurosurgery Tianjin Neurological Institute Tianjin Medical University General Hospital Tianjin China.,Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System Ministry of Education Tianjin China.,Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System Tianjin China
| | - Xin-Long Dong
- Department of Neurosurgery Tianjin Neurological Institute Tianjin Medical University General Hospital Tianjin China.,Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System Ministry of Education Tianjin China.,Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System Tianjin China
| | - Ya-Dan Li
- Intensive Care Units Tianjin Huanhu Hospital Tianjin China
| | - Wei-Wei Gao
- Department of Neurosurgery Tianjin Neurological Institute Tianjin Medical University General Hospital Tianjin China.,Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System Ministry of Education Tianjin China.,Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System Tianjin China
| | - Yuan Zhou
- Department of Neurosurgery Tianjin Neurological Institute Tianjin Medical University General Hospital Tianjin China.,Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System Ministry of Education Tianjin China.,Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System Tianjin China
| | - Rong-Cai Jiang
- Department of Neurosurgery Tianjin Neurological Institute Tianjin Medical University General Hospital Tianjin China.,Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System Ministry of Education Tianjin China.,Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System Tianjin China
| | - Shu-Yuan Yue
- Department of Neurosurgery Tianjin Neurological Institute Tianjin Medical University General Hospital Tianjin China
| | - Zi-Wei Zhou
- Department of Neurosurgery Tianjin Neurological Institute Tianjin Medical University General Hospital Tianjin China.,Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System Ministry of Education Tianjin China.,Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System Tianjin China
| | - Jian-Ning Zhang
- Department of Neurosurgery Tianjin Neurological Institute Tianjin Medical University General Hospital Tianjin China.,Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System Ministry of Education Tianjin China.,Tianjin Key Laboratory of Injuries, Variations and Regeneration of Nervous System Tianjin China
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Safety of the Transcranial Focal Electrical Stimulation via Tripolar Concentric Ring Electrodes for Hippocampal CA3 Subregion Neurons in Rats. JOURNAL OF HEALTHCARE ENGINEERING 2017; 2017:4302810. [PMID: 29065603 PMCID: PMC5572595 DOI: 10.1155/2017/4302810] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Accepted: 07/19/2017] [Indexed: 12/13/2022]
Abstract
Epilepsy is a neurological disorder that affects approximately one percent of the world population. Noninvasive electrical brain stimulation via tripolar concentric ring electrodes has been proposed as an alternative/complementary therapy for seizure control. Previous results suggest its efficacy attenuating acute seizures in penicillin, pilocarpine-induced status epilepticus, and pentylenetetrazole-induced rat seizure models and its safety for the rat scalp, cortical integrity, and memory formation. In this study, neuronal counting was used to assess possible tissue damage in rats (n = 36) due to the single dose or five doses (given every 24 hours) of stimulation on hippocampal CA3 subregion neurons 24 hours, one week, and one month after the last stimulation dose. Full factorial analysis of variance showed no statistically significant difference in the number of neurons between control and stimulation-treated animals (p = 0.71). Moreover, it showed no statistically significant differences due to the number of stimulation doses (p = 0.71) nor due to the delay after the last stimulation dose (p = 0.96). Obtained results suggest that stimulation at current parameters (50 mA, 200 μs, 300 Hz, biphasic, charge-balanced pulses for 2 minutes) does not induce neuronal damage in the hippocampal CA3 subregion of the brain.
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Chang J, Yao X, Zou H, Wang L, Lu Y, Zhang Q, Zhao H. BDNF/PI3K/Akt and Nogo-A/RhoA/ROCK signaling pathways contribute to neurorestorative effect of Houshiheisan against cerebral ischemia injury in rats. JOURNAL OF ETHNOPHARMACOLOGY 2016; 194:1032-1042. [PMID: 27833029 DOI: 10.1016/j.jep.2016.11.005] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 10/06/2016] [Accepted: 11/04/2016] [Indexed: 06/06/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Houshiheisan (HSHS), a classic traditional medicine prescription, has notable effects on patients with stroke AIM OF THE STUDY: To investigate the neurorestorative effects of HSHS on ischemic stroke and explore its mode of action. MATERIALS AND METHODS Focal cerebral ischemia models were induced by permanent middle cerebral artery occlusion (pMCAO). Male Sprague-Dawley (SD) rats were randomly divided into 5 experimental groups: sham vehicle, ischemia vehicle, pMCAO+HSHS at 5.1, 10.2g/kg, and pMCAO+Ginaton 0.028g/kg. HSHS or Ginaton was administrated 6h after pMCAO onset. Neurological function was assessed and then rats were sacrificed 7 days after MCAO. Cerebral ischemic injury was evaluated by hematoxylin and eosin (HE) staining and Neuronal nuclear antigen (NeuN) immunofluorescence analysis. The levels of BDNF were detected by enzyme linked immunosorbent assay (ELISA), and the expression levels of PI3K/Akt and Nogo-A/RhoA/ROCK2 signaling pathway were detected by western blot and quantitative real-time PCR (qRT-PCR). RESULTS Compared with those results of pMCAO group, HSHS 5.1 and HSHS 10.2 groups markedly improved neurological function, alleviated pathological damage, promoted the neuronal survival, increased the expression of BDNF, PI3K, Akt, in protein and mRNA, decreased the expression of Nogo-A, NgR, RhoA and ROCK2 in protein and mRNA 7 days after pMCAO. CONCLUSIONS The findings demonstrate that HSHS had significant therapeutic effects on ischemic stroke and it perhaps worked through the activation of BDNF/PI3K/Akt and down-regulation of Nogo-A/RhoA/ROCK signaling pathways.
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Affiliation(s)
- Jiahui Chang
- School of Traditional Chinese Medicine, Capital Medical University, Beijing 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing 100069, China
| | - Xiaoquan Yao
- School of Traditional Chinese Medicine, Capital Medical University, Beijing 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing 100069, China
| | - Haiyan Zou
- School of Traditional Chinese Medicine, Capital Medical University, Beijing 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing 100069, China
| | - Lei Wang
- School of Traditional Chinese Medicine, Capital Medical University, Beijing 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing 100069, China
| | - Yue Lu
- School of Traditional Chinese Medicine, Capital Medical University, Beijing 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing 100069, China
| | - Qiuxia Zhang
- School of Traditional Chinese Medicine, Capital Medical University, Beijing 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing 100069, China.
| | - Hui Zhao
- School of Traditional Chinese Medicine, Capital Medical University, Beijing 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing 100069, China.
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Yang J, Liu L, Li T, Li C. Array Focal Cortical Stimulation Enhances Motor Function Recovery and Brain Remodeling in a Rat Model of Ischemia. J Stroke Cerebrovasc Dis 2016; 26:658-665. [PMID: 27955948 DOI: 10.1016/j.jstrokecerebrovasdis.2016.11.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 10/18/2016] [Accepted: 11/13/2016] [Indexed: 10/20/2022] Open
Abstract
OBJECTIVE Using a new microelectrode array implanted into the cranial window employing a new stimulation protocol, we investigated the effects of the implanted electrode arrays on both motor map plasticity and neural regeneration in a rodent model of stroke. MATERIALS AND METHODS Rats were pretrained on single-pellet retrieval task, then received focal ischemic infarction and microelectrode arrays implantation. Rats in the cortical stimulation (CS) group received daily electrical stimulation (1 hour each day) for 14 days whereas animals in the no stimulation (NS) group did not receive electrical stimulation and only underwent motor mapping. Behavior data and residual electrophysiological mapping on stimulation days 2, 5, 8, 11, and 14 were statistically compared. Neural reorganization in pathological with glial fibrillary acidic protein and microtubule-associated protein-2 was performed. RESULTS Rats in CS group showed greater increases in reaching accuracy and significantly decreased in motor threshold than rats in NS group. Immunohistochemical study has shown that array focal CS suppressed inflammatory response, and enhanced dendritic sprouting in the peri-infarction cortex. CONCLUSION The present findings support the viability of epidural CS with microelectrode arrays for enhancing motor function after stroke and monitoring the neural reorganization of residual electrophysiological mapping after motor cortex injury.
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Affiliation(s)
- Jing Yang
- Department of Neurology, Renmin Hospital of Wuhan University, Wuhan, Hubei, China
| | - Lu Liu
- Department of Neurology, Renmin Hospital of Wuhan University, Wuhan, Hubei, China
| | - Tao Li
- Department of Neurology, Renmin Hospital of Wuhan University, Wuhan, Hubei, China.
| | - Chengyan Li
- Department of Neurology, Renmin Hospital of Wuhan University, Wuhan, Hubei, China.
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Plautz EJ, Barbay S, Frost SB, Zoubina EV, Stowe AM, Dancause N, Eisner-Janowicz I, Bury SD, Taylor MD, Nudo RJ. Effects of Subdural Monopolar Cortical Stimulation Paired With Rehabilitative Training on Behavioral and Neurophysiological Recovery After Cortical Ischemic Stroke in Adult Squirrel Monkeys. Neurorehabil Neural Repair 2015; 30:159-72. [PMID: 26704255 DOI: 10.1177/1545968315619701] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
BACKGROUND Cortical stimulation (CS) combined with rehabilitative training (RT) has proven effective for enhancing poststroke functional recovery in rats, but human clinical trials have had mixed outcomes. OBJECTIVE To assess the efficacy of CS/RT versus RT in a nonhuman primate model of cortical ischemic stroke. METHODS Squirrel monkeys learned a pellet retrieval task, then received an infarct to the distal forelimb (DFL) representation of primary motor cortex. A subdural monopolar electrode was implanted over the spared DFL representation in dorsal premotor cortex (PMD). Seven weeks postinfarct, monkeys underwent 4 to 6 weeks of RT (n = 8) or CS/RT (n = 7; 100 Hz, cathodal current) therapy. Behavioral performance was assessed before and after infarct, prior to therapy, and 1 and 12 weeks posttherapy (follow-up). The primary outcome measure was motor performance at 1 week posttherapy. Secondary outcomes included follow-up performance at 12 weeks and treatment-related changes in neurophysiological maps of spared DFL representations. RESULTS While postinfarct performance deficits were found in all monkeys, both groups demonstrated similar recovery profiles, with no difference in motor recovery between the RT and CS/RT groups. Posttherapy, PMD DFL area was significantly expanded in the RT group but not the CS/RT group. A significant relationship was found between motor recovery and DFL expansion in premotor cortex. CONCLUSIONS Results suggest that the specific parameters utilized here were not optimal for promoting behavioral recovery in nonhuman primates. Though CS/RT has consistently shown efficacy in rat stroke models, the present finding has cautionary implications for translation of CS/RT therapy to clinical populations.
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Affiliation(s)
- Erik J Plautz
- University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Scott Barbay
- University of Kansas Medical Center, Kansas City, KS, USA
| | - Shawn B Frost
- University of Kansas Medical Center, Kansas City, KS, USA
| | | | - Ann M Stowe
- University of Texas Southwestern Medical Center, Dallas, TX, USA
| | | | | | - Scott D Bury
- University of Kansas Medical Center, Kansas City, KS, USA
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Balossier A, Etard O, Descat C, Vivien D, Emery E. Epidural Cortical Stimulation as a Treatment for Poststroke Aphasia. Neurorehabil Neural Repair 2015; 30:120-30. [DOI: 10.1177/1545968315606989] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Background. Nearly 15 million people suffer from stroke every year worldwide, with about 20% of the survivors retaining chronic aphasic symptoms. Spontaneous recovery is limited to 3 to 6 months. Cortical stimulation techniques have been proposed to enhance the recovery process. Objective. The goal of this study was to evaluate the benefit of epidural cortical stimulation for the treatment of poststroke aphasia, based on a systematic review of the literature. Methods. An extensive PubMed search was performed for English language articles published from 1990 to 2014 with the keywords (cortical OR epidural) AND stimulation AND stroke AND (aphasia OR language OR speech). The criteria analyzed included the type of study, epidemiology of patients, stroke, aphasia, stimulation protocol, concurrent rehabilitation therapies, language evaluations, results observed, and follow-up. Results. Seven cases were reported to date (3 case reports, 1 randomized controlled trial). All patients experienced nonfluent aphasia following an ischemic stroke. All four studies reported encouraging effects of the stimulation with improved lexical access and fluency for all patients. The effects were specific, independent of the motor recovery or of the pain reported by the patients, and they were linked to the stimulation parameters. Conclusions. Due to the small number of existing cases in the literature, the strength of the evidence is still low. Two main hypotheses of neurobiological mechanisms have been explored: either using continuous stimulation to modify cortical perilesional inhibition or using intermittent stimulation during the speech and language therapy sessions to explore synaptic plasticity and long-term potentiation or depression. To establish the role of epidural stimulation and the relevant stimulation protocols and parameters, large randomized controlled trials are mandatory. We suggest avenues of investigation.
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Affiliation(s)
- Anne Balossier
- Centre Hospitalier Universitaire de Caen, Caen, France
- Université de Caen Basse-Normandie, Caen, France
- INSERM U919, Caen, France
| | - Olivier Etard
- Centre Hospitalier Universitaire de Caen, Caen, France
- Université de Caen Basse-Normandie, Caen, France
| | - Chloé Descat
- Centre Hospitalier Universitaire de Caen, Caen, France
| | | | - Evelyne Emery
- Centre Hospitalier Universitaire de Caen, Caen, France
- Université de Caen Basse-Normandie, Caen, France
- INSERM U919, Caen, France
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Serum lipoprotein-A levels in healthy subjects indicate a lurking cerebro- and cardio-vascular risk in the younger population. Brain Res Bull 2013; 97:48-52. [DOI: 10.1016/j.brainresbull.2013.05.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2013] [Revised: 05/16/2013] [Accepted: 05/21/2013] [Indexed: 11/20/2022]
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