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Wang Y, Li D, Zhang L, Yin Z, Han Z, Ge X, Li M, Zhao J, Zhang S, Zuo Y, Xiong X, Gao H, Liu Q, Chen F, Lei P. Exosomes derived from microglia overexpressing miR-124-3p alleviate neuronal endoplasmic reticulum stress damage after repetitive mild traumatic brain injury. Neural Regen Res 2024; 19:2010-2018. [PMID: 38227530 DOI: 10.4103/1673-5374.391189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Accepted: 09/18/2023] [Indexed: 01/17/2024] Open
Abstract
JOURNAL/nrgr/04.03/01300535-202409000-00033/figure1/v/2024-01-16T170235Z/r/image-tiff We previously reported that miR-124-3p is markedly upregulated in microglia-derived exosomes following repetitive mild traumatic brain injury. However, its impact on neuronal endoplasmic reticulum stress following repetitive mild traumatic brain injury remains unclear. In this study, we first used an HT22 scratch injury model to mimic traumatic brain injury, then co-cultured the HT22 cells with BV2 microglia expressing high levels of miR-124-3p. We found that exosomes containing high levels of miR-124-3p attenuated apoptosis and endoplasmic reticulum stress. Furthermore, luciferase reporter assay analysis confirmed that miR-124-3p bound specifically to the endoplasmic reticulum stress-related protein IRE1α, while an IRE1α functional salvage experiment confirmed that miR-124-3p targeted IRE1α and reduced its expression, thereby inhibiting endoplasmic reticulum stress in injured neurons. Finally, we delivered microglia-derived exosomes containing miR-124-3p intranasally to a mouse model of repetitive mild traumatic brain injury and found that endoplasmic reticulum stress and apoptosis levels in hippocampal neurons were significantly reduced. These findings suggest that, after repetitive mild traumatic brain injury, miR-124-3 can be transferred from microglia-derived exosomes to injured neurons, where it exerts a neuroprotective effect by inhibiting endoplasmic reticulum stress. Therefore, microglia-derived exosomes containing miR-124-3p may represent a novel therapeutic strategy for repetitive mild traumatic brain injury.
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Affiliation(s)
- Yan Wang
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Geriatrics Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Dai Li
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Geriatrics Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Lan Zhang
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Geriatrics Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Zhenyu Yin
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Geriatrics Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Zhaoli Han
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Geriatrics Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Xintong Ge
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Geriatrics Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Meimei Li
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Geriatrics Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Jing Zhao
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Geriatrics Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Shishuang Zhang
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Geriatrics Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Yan Zuo
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Geriatrics Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Xiangyang Xiong
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Geriatrics Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Han Gao
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Geriatrics Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Qiang Liu
- Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Fanglian Chen
- Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Ping Lei
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Geriatrics Institute, Tianjin Medical University General Hospital, Tianjin, China
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Markicevic M, Mandino F, Toyonaga T, Cai Z, Fesharaki-Zadeh A, Chen X, Strittmatter SM, Lake E. Repetitive mild closed-head injury induced synapse loss and increased local BOLD-fMRI signal homogeneity. J Neurotrauma 2024. [PMID: 39096127 DOI: 10.1089/neu.2024.0095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/04/2024] Open
Abstract
Repeated mild head injuries due to sports, or domestic violence and military service are increasingly linked to debilitating symptoms in the long term. Although symptoms may take decades to manifest, potentially treatable neurobiological alterations must begin shortly after injury. Better means to diagnose and treat traumatic brain injuries, requires an improved understanding of the mechanisms underlying progression and means through which they can be measured. Here, we employ a repetitive mild closed-head injury (rmTBI) and chronic variable stress (CVS) mouse model to investigate emergent structural and functional brain abnormalities. Brain imaging is achieved with [18F]SynVesT-1 positron emission tomography, with the synaptic vesicle glycoprotein 2A ligand marking synapse density and BOLD (blood-oxygen-level-dependent) functional magnetic resonance imaging (fMRI). Animals were scanned six weeks after concluding rmTBI/Stress procedures. Injured mice showed widespread decreases in synaptic density coupled with an increase in local BOLD-fMRI synchrony detected as regional homogeneity. Injury-affected regions with higher synapse density showed a greater increase in fMRI regional homogeneity. Taken together, these observations may reflect compensatory mechanisms following injury. Multimodal studies are needed to provide deeper insights into these observations.
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Affiliation(s)
- Marija Markicevic
- Yale University, Radiology and Biomedical Imaging , Anlyan Centre, New Haven, Connecticut, United States, 06520;
| | - Francesca Mandino
- Yale University, Radiology and Biomedical Imaging , New Haven, Connecticut, United States;
| | - Takuya Toyonaga
- Yale University, Radiology and Biomedical Imaging , New Haven, Connecticut, United States;
| | - Zhengxin Cai
- Yale University, Radiology and Biomedical Imaging , New Haven, Connecticut, United States;
| | - Arman Fesharaki-Zadeh
- Yale School of Medicine, Neurology, 800 Howard Avenue, New Haven, CT 06519, New Haven, Connecticut, United States, 06520-8055;
| | - Xilin Chen
- Yale University, Radiology and Biomedical Imaging , New Haven, Connecticut, United States;
| | - Stephen M Strittmatter
- Yale University School of Medicine, Neurology, CNNR Program, BCMM 436, New Haven, Connecticut, United States, 06536;
| | - Evelyn Lake
- Yale University, Radiology and Biomedical Imaging , New Haven, Connecticut, United States;
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3
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He L, Li M, Zhang Y, Li Q, Fang S, Chen G, Xu X. Neuroinflammation Plays a Potential Role in the Medulla Oblongata After Moderate Traumatic Brain Injury in Mice as Revealed by Nontargeted Metabonomics Analysis. J Neurotrauma 2024; 41:e2026-e2038. [PMID: 38695184 DOI: 10.1089/neu.2023.0536] [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] [Indexed: 05/22/2024] Open
Abstract
Moderate traumatic brain injury (mTBI) involves a series of complex pathophysiological processes in not only the area in direct contact with mechanical violence but also in other brain regions far from the injury site, which may be important factors influencing subsequent neurological dysfunction or death. The medulla oblongata (MO) is a key area for the maintenance of basic respiratory and circulatory functions, whereas the pathophysiological processes after mTBI have rarely drawn the attention of researchers. In this study, we established a closed-head cortical contusion injury model, identified 6 different time points that covered the acute, subacute, and chronic phases, and then used nontargeted metabolomics to identify and analyze the changes in differential metabolites (DMs) and metabolic pathways in the MO region. Our results showed that the metabolic profile of the MO region underwent specific changes over time: harmaline, riboflavin, and dephospho-coenzyme A were identified as the key DMs and play important roles in reducing inflammation, enhancing antioxidation, and maintaining homeostasis. Choline and glycerophospholipid metabolism was identified as the key pathway related to the changes in MO metabolism at different phases. In addition, we confirmed increases in the levels of inflammatory factors and the activation of astrocytes and microglia by Western blot and immunofluorescence staining, and these findings were consistent with the nontargeted metabolomic results. These findings suggest that neuroinflammation plays a central role in MO neuropathology after mTBI and provide new insights into the complex pathophysiologic mechanisms involved after mTBI.
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Affiliation(s)
- Liangchao He
- School of Forensic Medicine, Wannan Medical College, Wuhu, China
| | - Mingming Li
- School of Forensic Medicine, Wannan Medical College, Wuhu, China
| | - Yonghao Zhang
- School of Forensic Medicine, Wannan Medical College, Wuhu, China
| | - Qianqian Li
- School of Forensic Medicine, Wannan Medical College, Wuhu, China
| | - Shiyong Fang
- School of Forensic Medicine, Wannan Medical College, Wuhu, China
| | - Guang Chen
- School of Forensic Medicine, Wannan Medical College, Wuhu, China
| | - Xiang Xu
- School of Forensic Medicine, Wannan Medical College, Wuhu, China
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4
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Markicevic M, Mandino F, Toyonaga T, Cai Z, Fesharaki-Zadeh A, Shen X, Strittmatter SM, Lake E. Repetitive mild closed-head injury induced synapse loss and increased local BOLD-fMRI signal homogeneity. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.05.24.595651. [PMID: 38826468 PMCID: PMC11142233 DOI: 10.1101/2024.05.24.595651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2024]
Abstract
Repeated mild head injuries due to sports, or domestic violence and military service are increasingly linked to debilitating symptoms in the long term. Although symptoms may take decades to manifest, potentially treatable neurobiological alterations must begin shortly after injury. Better means to diagnose and treat traumatic brain injuries, requires an improved understanding of the mechanisms underlying progression and means through which they can be measured. Here, we employ a repetitive mild closed-head injury (rmTBI) and chronic variable stress (CVS) mouse model to investigate emergent structural and functional brain abnormalities. Brain imaging is achieved with [ 18 F]SynVesT-1 positron emission tomography, with the synaptic vesicle glycoprotein 2A ligand marking synapse density and BOLD (blood-oxygen-level-dependent) functional magnetic resonance imaging (fMRI). Animals were scanned six weeks after concluding rmTBI/Stress procedures. Injured mice showed widespread decreases in synaptic density coupled with an i ncrease in local BOLD-fMRI synchrony detected as regional homogeneity. Injury-affected regions with higher synapse density showed a greater increase in fMRI regional homogeneity. Taken together, these observations may reflect compensatory mechanisms following injury. Multimodal studies are needed to provide deeper insights into these observations.
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5
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Lu S, Ge Q, Yang M, Zhuang Y, Xu X, Niu F, Liu B, Tian R. Decoupling the mutual promotion of inflammation and oxidative stress mitigates cognitive decline and depression-like behavior in rmTBI mice by promoting myelin renewal and neuronal survival. Biomed Pharmacother 2024; 173:116419. [PMID: 38479178 DOI: 10.1016/j.biopha.2024.116419] [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: 01/10/2024] [Revised: 03/05/2024] [Accepted: 03/06/2024] [Indexed: 03/27/2024] Open
Abstract
BACKGROUND Repetitive mild traumatic brain injury (rmTBI) can lead to somatic, emotional, and cognitive symptoms that persist for years after the initial injury. Although the ability of various treatments to promote recovery after rmTBI has been explored, the optimal time window for early intervention after rmTBI is unclear. Previous research has shown that hydrogen-rich water (HRW) can diffuse through the blood-brain - barrier, attenuate local oxidative stress, and reduce neuronal apoptosis in patients with severe traumatic brain injury. However, research on the effect of HRW on rmTBI is scarce. AIMS The objectives of this study were to explore the following changes after rmTBI and HRW treatment: (i) temporal changes in inflammasome activation and oxidative stress-related protein expression through immunoblotting, (ii) temporal changes in neuron/myelin-related metabolite concentrations in vivo through magnetic resonance spectroscopy, (iii) myelin structural changes in late-stage rmTBI via immunofluorescence, and (iv) postinjury anxiety/depression-like behaviors and spatial learning and memory impairment. RESULTS NLRP-3 expression in the rmTBI group was elevated at 7 and 14 DPI, and inflammasome marker levels returned to normal at 30 DPI. Oxidative stress persisted throughout the first month postinjury. HRW replacement significantly decreased Nrf2 expression in the prefrontal cortex and hippocampal CA2 region at 14 and 30 DPI, respectively. Edema and local gliosis in the hippocampus and restricted diffusion in the thalamus were observed on MR-ADC images. The tCho/tCr ratio in the rmTBI group was elevated, and the tNAA/tCr ratio was decreased at 30 DPI. Compared with the mice in the other groups, the mice in the rmTBI group spent more time exploring the open arms in the elevated plus maze (P < 0.05) and were more active in the maze (longer total distance traveled). In the sucrose preference test, the rmTBI group exhibited anhedonia. In the Morris water maze test, the latency to find the hidden platform in the rmTBI group was longer than that in the sham and HRW groups (P < 0.05). CONCLUSION Early intervention with HRW can attenuate inflammasome assembly and reduce oxidative stress after rmTBI. These changes may restore local oligodendrocyte function, promote myelin repair, prevent axonal damage and neuronal apoptosis, and alleviate depression-like behavior and cognitive impairment.
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Affiliation(s)
- Shenghua Lu
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China; Beijing Key Laboratory of Central Nervous System Injury, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
| | - QianQian Ge
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - MengShi Yang
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China; Beijing Key Laboratory of Central Nervous System Injury, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
| | - Yuan Zhuang
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China; Beijing Key Laboratory of Central Nervous System Injury, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
| | - Xiaojian Xu
- Beijing Key Laboratory of Central Nervous System Injury, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
| | - Fei Niu
- Beijing Key Laboratory of Central Nervous System Injury, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
| | - Baiyun Liu
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China; Beijing Key Laboratory of Central Nervous System Injury, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China; Center for Nerve Injury and Repair, Beijing Institute of Brain Disorders, Beijing, China; China National Clinical Research Center for Neurological Diseases, Beijing, China.
| | - Runfa Tian
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China; Beijing Key Laboratory of Central Nervous System Injury, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China; Center for Nerve Injury and Repair, Beijing Institute of Brain Disorders, Beijing, China; China National Clinical Research Center for Neurological Diseases, Beijing, China.
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6
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Baudry M, Luo YL, Bi X. Calpain-2 Inhibitors as Therapy for Traumatic Brain Injury. Neurotherapeutics 2023; 20:1592-1602. [PMID: 37474874 PMCID: PMC10684478 DOI: 10.1007/s13311-023-01407-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/30/2023] [Indexed: 07/22/2023] Open
Abstract
While calpains have long been implicated in neurodegeneration, no calpain inhibitor has been developed for the treatment of neurodegeneration. This is partly due to the lack of understanding of the specific functions of most of the 15 members of the calpain family. Work from our laboratory over the last 5-10 years has revealed that calpain-1 and calpain-2, two of the major calpain isoforms in the brain, play opposite roles in both synaptic plasticity/learning and memory and neuroprotection/neurodegeneration. Thus, calpain-1 activation is required for triggering certain forms of synaptic plasticity and for learning some types of information and is neuroprotective. In contrast, calpain-2 activation limits the extent of synaptic plasticity and of learning and is neurodegenerative. These results have been validated with the use of calpain-1 knock-out mice and mice with a selective calpain-2 deletion in excitatory neurons of the forebrain. Through a medicinal chemistry campaign, we have identified a number of selective calpain-2 inhibitors and shown that these inhibitors do facilitate learning of certain tasks and are neuroprotective in a number of animal models of acute neurodegeneration. One of these inhibitors, NA-184, is currently being developed for the treatment of traumatic brain injury, and clinical trials are being planned.
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Affiliation(s)
- Michel Baudry
- CDM, Western University of Health Sciences, 309 E. 2nd St, Pomona, CA, 91766, USA.
| | - Yun Lyna Luo
- CoP, Western University of Health Sciences, Pomona, CA, 91766, USA
| | - Xiaoning Bi
- COMP, Western University of Health Sciences, Pomona, CA, 91766, USA
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Wang D, Zhang S, Ge X, Yin Z, Li M, Guo M, Hu T, Han Z, Kong X, Li D, Zhao J, Wang L, Liu Q, Chen F, Lei P. Mesenchymal stromal cell treatment attenuates repetitive mild traumatic brain injury-induced persistent cognitive deficits via suppressing ferroptosis. J Neuroinflammation 2022; 19:185. [PMID: 35836233 PMCID: PMC9281149 DOI: 10.1186/s12974-022-02550-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Accepted: 07/06/2022] [Indexed: 11/10/2022] Open
Abstract
The incidence of repetitive mild traumatic brain injury (rmTBI), one of the main risk factors for predicting neurodegenerative disorders, is increasing; however, its underlying mechanism remains unclear. As suggested by several studies, ferroptosis is possibly related to TBI pathophysiology, but its effect on rmTBI is rarely studied. Mesenchymal stromal cells (MSCs), the most studied experimental cells in stem cell therapy, exert many beneficial effects on diseases of the central nervous system, yet evidence regarding the role of MSCs in ferroptosis and post-rmTBI neurodegeneration is unavailable. Our study showed that rmTBI resulted in time-dependent alterations in ferroptosis-related biomarker levels, such as abnormal iron metabolism, glutathione peroxidase (GPx) inactivation, decrease in GPx4 levels, and increase in lipid peroxidation. Furthermore, MSC treatment markedly decreased the aforementioned rmTBI-mediated alterations, neuronal damage, pathological protein deposition, and improved cognitive function compared with vehicle control. Similarly, liproxstatin-1, a ferroptosis inhibitor, showed similar effects. Collectively, based on the above observations, MSCs ameliorate cognitive impairment following rmTBI, partially via suppressing ferroptosis, which could be a therapeutic target for rmTBI.
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Affiliation(s)
- Dong Wang
- Haihe Laboratory of Cell Ecosystem, Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China.,Tianjin Geriatrics Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Shishuang Zhang
- Haihe Laboratory of Cell Ecosystem, Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China.,Tianjin Geriatrics Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Xintong Ge
- Haihe Laboratory of Cell Ecosystem, Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China.,Tianjin Geriatrics Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Zhenyu Yin
- Haihe Laboratory of Cell Ecosystem, Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China.,Tianjin Geriatrics Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Meimei Li
- Haihe Laboratory of Cell Ecosystem, Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China.,Tianjin Geriatrics Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Mengtian Guo
- Haihe Laboratory of Cell Ecosystem, Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China.,Tianjin Geriatrics Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Tianpeng Hu
- Haihe Laboratory of Cell Ecosystem, Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China.,Tianjin Geriatrics Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Zhaoli Han
- Haihe Laboratory of Cell Ecosystem, Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China.,Tianjin Geriatrics Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Xiaodong Kong
- Haihe Laboratory of Cell Ecosystem, Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China.,Tianjin Geriatrics Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Dai Li
- Haihe Laboratory of Cell Ecosystem, Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China.,Tianjin Geriatrics Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Jing Zhao
- Haihe Laboratory of Cell Ecosystem, Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China.,Tianjin Geriatrics Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Lu Wang
- Haihe Laboratory of Cell Ecosystem, Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China.,Tianjin Geriatrics Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Qiang Liu
- Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Fanglian Chen
- Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Ping Lei
- Haihe Laboratory of Cell Ecosystem, Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China. .,Tianjin Geriatrics Institute, Tianjin Medical University General Hospital, Tianjin, China.
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8
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Ge X, Zhu L, Li M, Li W, Chen F, Li Y, Zhang J, Lei P. A Novel Blood Inflammatory Indicator for Predicting Deterioration Risk of Mild Traumatic Brain Injury. Front Aging Neurosci 2022; 14:878484. [PMID: 35557838 PMCID: PMC9087837 DOI: 10.3389/fnagi.2022.878484] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 03/18/2022] [Indexed: 12/29/2022] Open
Abstract
Mild traumatic brain injury (mTBI) has a relatively higher incidence in aging people due to walking problems. Cranial computed tomography and magnetic resonance imaging provide the standard diagnostic tool to identify intracranial complications in patients with mTBI. However, it is still necessary to further explore blood biomarkers for evaluating the deterioration risk at the early stage of mTBI to improve medical decision-making in the emergency department. The activation of the inflammatory response is one of the main pathological mechanisms leading to unfavorable outcomes of mTBI. As complete blood count (CBC) analysis is the most extensively used laboratory test in practice, we extracted clinical data of 994 patients with mTBI from two large clinical cohorts (MIMIC-IV and eICU-CRD) and selected inflammation-related indicators from CBC analysis to investigate their relationship with the deterioration after mTBI. The combinatorial indices neutrophil-to-lymphocyte ratio (NLR), red cell distribution width-to-platelet ratio (RPR), and NLR times RPR (NLTRP) were supposed to be potential risk predictors, and the data from the above cohorts were integratively analyzed using our previously reported method named MeDICS. We found that NLR, RPR, and NLTRP levels were higher among deteriorated patients than non-deteriorated patients with mTBI. Besides, high NLTRP was associated with increased deterioration risk, with the odds ratio increasing from NLTRP of 1–2 (2.69, 1.48–4.89) to > 2 (4.44, 1.51–13.08), using NLTRP of 0–1 as the reference. NLTRP had a moderately good prognostic performance with an area under the ROC curve of 0.7554 and a higher prediction value than both NLR and RPR, indicated by the integrated discrimination improvement index. The decision curve analysis also showed greater clinical benefits of NLTRP than NLR and RPR in a large range of threshold probabilities. Subgroup analysis further suggested that NLTRP is an independent risk factor for the deterioration after mTBI. In addition, in vivo experiments confirmed the association between NLTRP and neural/systemic inflammatory response after mTBI, which emphasized the importance of controlling inflammation in clinical treatment. Consequently, NLTRP is a promising biomarker for the deterioration risk of mTBI. It can be used in resource-limited settings, thus being proposed as a routinely available tool at all levels of the medical system.
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Affiliation(s)
- Xintong Ge
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Geriatrics Institute, Tianjin, China
| | - Luoyun Zhu
- Department of Medical Examination, Tianjin Medical University General Hospital, Tianjin, China
- Key Laboratory of Immune Microenvironment and Disease, Department of Pathogen Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Meimei Li
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Geriatrics Institute, Tianjin, China
| | - Wenzhu Li
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Geriatrics Institute, Tianjin, China
| | - Fanglian Chen
- Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Tianjin Neurological Institute, Tianjin, China
| | - Yongmei Li
- Key Laboratory of Immune Microenvironment and Disease, Department of Pathogen Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Jianning Zhang
- Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Tianjin Neurological Institute, Tianjin, China
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
| | - Ping Lei
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China
- Tianjin Geriatrics Institute, Tianjin, China
- *Correspondence: Ping Lei,
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9
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A novel simple traumatic brain injury mouse model. Chin Neurosurg J 2022; 8:8. [PMID: 35361274 PMCID: PMC8974042 DOI: 10.1186/s41016-022-00273-5] [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: 09/22/2021] [Accepted: 02/10/2022] [Indexed: 11/16/2022] Open
Abstract
Background Traumatic brain injury, one of the leading causes of death in adults under 40 years of age in the world, is frequently caused by mechanical shock, resulting in diffuse neuronal damage and long-term cognitive dysfunction. Many existing TBI animal models revival with expensive equipment or special room are needed or the processes of operations are complex and not easy to be widely used. Therefore, a simpler TBI model needs to be designed. Methods Our TBI model is an innovation of the modeling method through air guns shutting rubber bullets. A core facet is the application of our designed rubber bullet impact device. It could focus the hitting power to the fixed site of the brain, thus triggering a mild closed head injury. Moreover, the degree of damage can be adjusted by the times of shots. Results Our model induced blood-brain barrier leakage and diffused neuronal damage. Besides, it led to an increased level of Tau phosphorylation and resulted in cognitive dysfunction within several weeks post-injury. Conclusion Our TBI model is not only simple and time-saving but also can simulate mild brain injuries in clinical. It is suitable for exploring pathobiological mechanisms as well as a screening of potential therapies for TBI. Supplementary Information The online version contains supplementary material available at 10.1186/s41016-022-00273-5.
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10
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Hu T, Han Z, Xiong X, Li M, Guo M, Yin Z, Wang D, Cheng L, Li D, Zhang S, Wang L, Zhao J, Liu Q, Chen F, Lei P. Inhibition of Exosome Release Alleviates Cognitive Impairment After Repetitive Mild Traumatic Brain Injury. Front Cell Neurosci 2022; 16:832140. [PMID: 35153676 PMCID: PMC8829393 DOI: 10.3389/fncel.2022.832140] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Accepted: 01/06/2022] [Indexed: 12/14/2022] Open
Abstract
BackgroundRepetitive mild traumatic brain injury (rmTBI) is closely associated with chronic traumatic encephalopathy (CTE). Neuroinflammation and neuropathological protein accumulation are key links to CTE progression. Exosomes play important roles in neuroinflammation and neuropathological protein accumulation and spread. Here, we explored the role of brain-derived exosomes (BDEs) in mice with rmTBI and how the inhibition of BDE release contributes to neuroprotection.MethodsGW4869 was used to inhibit exosome release, and behavioural tests, PET/CT and western blotting were conducted to explore the impact of this inhibition from different perspectives. We further evaluated cytokine expression by Luminex and microglial activation by immunofluorescence in mice with rmTBI after exosome release inhibition.ResultsInhibition of BDE release reversed cognitive impairment in mice with rmTBI, enhanced glucose uptake and decreased neuropathological protein expression. Inhibition of BDE release also changed cytokine production trends and enhanced microglial proliferation.ConclusionIn this study, we found that BDEs are key factor in cognitive impairment in mice with rmTBI and that microglia are the main target of BDEs. Thus, inhibition of exosome release may be a new strategy for improving CTE prognoses.
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Affiliation(s)
- Tianpeng Hu
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China
| | - Zhaoli Han
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China
| | - Xiangyang Xiong
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China
| | - Meimei Li
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China
| | - Mengtian Guo
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China
| | - Zhenyu Yin
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China
| | - Dong Wang
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China
| | - Lu Cheng
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China
| | - Dai Li
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China
| | - Shishuang Zhang
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China
| | - Lu Wang
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China
| | - Jing Zhao
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China
| | - Qiang Liu
- Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Fanglian Chen
- Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Ping Lei
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China
- *Correspondence: Ping Lei,
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11
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Dependence of visual and cognitive outcomes on animal holder configuration in a rodent model of blast overpressure exposure. Vision Res 2021; 188:162-173. [PMID: 34333201 DOI: 10.1016/j.visres.2021.07.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 05/24/2021] [Accepted: 07/14/2021] [Indexed: 02/04/2023]
Abstract
Blast-induced traumatic brain injury is the signature injury of modern military conflicts. To more fully understand the effects of blast exposure, we placed rats in different holder configurations, exposed them to blast overpressure, and assessed the degree of eye and brain injury. Anesthetized Long-Evans rats received blast exposures directed at the head (63 kPa, 195 dB-SPL) in either an "open holder" (head and neck exposed; n = 7), or an "enclosed holder" (window for blast exposure to eye; n = 15) and were compared to non-blast exposed (control) rats (n = 22). Outcomes included optomotor response (OMR), electroretinography (ERG), and spectral domain optical coherence tomography (SD-OCT) at 2, 4, and 6 months post-blast, and cognitive function (Y-maze) at 3 months. Spatial frequency and contrast sensitivity were reduced in ipsilateral blast-exposed eyes in both holders (p < 0.01), while contralateral eyes showed greater deficits with the enclosed holder (p < 0.05). Thinner retinas (p < 0.001) and reduced ERG a- and b- wave amplitudes (p < 0.05) were observed for both ipsilateral and contralateral eyes with the enclosed, but not the open, holder. Rats in the open holder showed cognitive deficits compared to rats in the enclosed holder (p < 0.05). Overall, the animal holder configuration used in blast exposure studies can significantly affect outcomes. Enclosed holders may cause secondary damage to the contralateral eye by concussive injury or blast wave reflection off the holder wall. Open holders may damage the brain via rapid head movement (contrecoup injury). These results highlight additional factors to be considered when evaluating patients with blast exposure or developing models of blast injury.
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12
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Ge X, Zhu L, Li W, Sun J, Chen F, Li Y, Lei P, Zhang J. Red Cell Distribution Width to Platelet Count Ratio: A Promising Routinely Available Indicator of Mortality for Acute Traumatic Brain Injury. J Neurotrauma 2021; 39:159-171. [PMID: 33719580 DOI: 10.1089/neu.2020.7481] [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] [Indexed: 01/10/2023] Open
Abstract
Prognosis evaluation is crucial for the effective management of patients with acute traumatic brain injury (TBI). However, there is still a lack of routinely available blood indicators for mortality risk in clinical practice. To investigate whether blood red cell distribution width to platelet count ratio (RPR) correlates with hospital mortality of TBI, clinical data of 2220 patients with TBI were extracted from two large intensive care unit cohorts (MIMIC-III and eICU Database), and were integratively analyzed using our developed method named MeDICS. We found that higher RPR can be observed among non-survivors than survivors of TBI (p < 0.001). It had a moderately good prognostic performance for mortality with an area under receiver-operating characteristic curve (AUC) of 0.7367, which was greater than that of Glasgow Coma Scale (GCS; AUC = 0.6022). Besides, the nomogram consisting of RPR, GCS, and other risk factors was developed, where 10-fold cross-validation was performed to protect it against overfitting. A Harrell's C-index of 0.8523 was determined, suggesting an improved prognostic value based on RPR. The in vivo experiments further confirmed the association between RPR and neuro-outcome after TBI. It indicated that the continuous change in RPR post-injury is attributed to the development of inflammation, which emphasized the importance of controlling inflammatory response in clinical treatment. Taken together, RPR is a promising routinely available predictor of mortality for acute TBI. The nomogram generated from it can be used in resource-limited settings, thus be proposed as a prognosis evaluation aid for patients with TBI in all levels of medical system.
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Affiliation(s)
- Xintong Ge
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China.,Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin Neurological Institute, Tianjin, China.,Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Tianjin Neurological Institute, Tianjin, China
| | - Luoyun Zhu
- Department of Medical Examination, Tianjin Medical University General Hospital, Tianjin, China
| | - Wenzhu Li
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China.,Laboratory of Neuro-Trauma and Neurodegenerative Disorders, Tianjin Geriatrics Institute, Tianjin, China
| | - Jian Sun
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
| | - Fanglian Chen
- Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin Neurological Institute, Tianjin, China.,Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Tianjin Neurological Institute, Tianjin, China
| | - Yongmei Li
- Department of Pathogen Biology, School of Basic Medical Sciences, Key Lab of Immune Microenvironment and Disease (Ministry of Education) Tianjin Medical University, Tianjin, China
| | - Ping Lei
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China.,Laboratory of Neuro-Trauma and Neurodegenerative Disorders, Tianjin Geriatrics Institute, Tianjin, China
| | - Jianning Zhang
- Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin Neurological Institute, Tianjin, China.,Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Tianjin Neurological Institute, Tianjin, China
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13
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Wu J, Li H, He J, Tian X, Luo S, Li J, Li W, Zhong J, Zhang H, Huang Z, Sun X, Jiang T. Downregulation of microRNA-9-5p promotes synaptic remodeling in the chronic phase after traumatic brain injury. Cell Death Dis 2021; 12:9. [PMID: 33414448 PMCID: PMC7790831 DOI: 10.1038/s41419-020-03329-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 12/03/2020] [Accepted: 12/07/2020] [Indexed: 01/29/2023]
Abstract
The level of microRNA-9-5p (miRNA-9-5p) in brain tissues is significantly changed in the chronic phase after traumatic brain injury (TBI). However, the effect of miRNA-9-5p on brain function after TBI has not been elucidated. In this study, we used a controlled cortical impact (CCI) model to induce TBI in Sprague-Dawley rats. Brain microvascular endothelial cells (BMECs), astrocytes, and neurons were extracted from immature Sprague-Dawley rats and cocultured to reconstruct the neurovascular unit (NVU) in vitro. The results showed that downregulation of miRNA-9-5p in the chronic phase contributed to neurological function recovery by promoting astrocyte proliferation and increasing the release of astrocyte-derived neurotrophic factors around injured brain tissues after TBI. A dual-luciferase reporter assay validated that miRNA-9-5p was a post-transcriptional modulator of thrombospondin 2 (Thbs-2), and downregulation of miRNA-9-5p promoted Thbs-2 expression in astrocytes. Furthermore, we verified that Thbs-2 can promote Notch pathway activation by directly binding to Jagged and Notch. Through in vitro experiments, we found that the expression of synaptic proteins and the number of synaptic bodies were increased in neurons in the NVU, which was constructed using astrocytes pretreated with miRNA-9-5p inhibitor. Moreover, we also found that downregulation of miRNA-9-5p promoted Thbs-2 expression in astrocytes, which activated the Notch/cylindromatosis/transforming growth factor-β-activated kinase 1 pathway in neurons and promoted the expression of synaptic proteins, including post-synaptic density protein 95 and synaptotagmin. Based on these results, miRNA-9-5p may be a new promising prognostic marker and treatment target for TBI.
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Affiliation(s)
- Jingchuan Wu
- grid.452206.7Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 China ,Department of Neurosurgery, General Hospital of The YangTze River Shipping, Wuhan Brain Hospital, Wuhan, Hubei 430014 China
| | - Hui Li
- grid.452206.7Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 China
| | - Junchi He
- grid.452206.7Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 China
| | - Xiaocui Tian
- grid.203458.80000 0000 8653 0555College of Pharmacy, Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology, Chongqing Medical University, Chongqing, Yuzhong 400016 China
| | - Shuilian Luo
- grid.413247.7Department of Ultrasound, Zhongnan Hospital of WuHan University, Wuhan, 430071 China
| | - Jiankang Li
- grid.35030.350000 0004 1792 6846Dept of Computer Science, City University of Hong Kong, 83 Tat Chee Ave, Kowloon Hong Kong, China
| | - Wei Li
- grid.410726.60000 0004 1797 8419BGI Education Center, University of Chinese Academy of Sciences, Shenzhen, 518083 China
| | - Jianjun Zhong
- grid.452206.7Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 China
| | - Hongrong Zhang
- grid.452206.7Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 China
| | - Zhijian Huang
- grid.452206.7Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 China
| | - Xiaochuan Sun
- grid.452206.7Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 China
| | - Tao Jiang
- grid.24696.3f0000 0004 0369 153XDepartment of Neurosurgery, Beijing TianTan Hospital, Capital Medical University, Beijing, 100050 China ,grid.24696.3f0000 0004 0369 153XBeijing Neurosurgical Institute, Capital Medical University, Beijing, 100050 China ,grid.411617.40000 0004 0642 1244China National Clinical Research Center for Neurological diseases, Beijing, China
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14
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Eyolfson E, Carr T, Khan A, Wright DK, Mychasiuk R, Lohman AW. Repetitive Mild Traumatic Brain Injuries in Mice during Adolescence Cause Sexually Dimorphic Behavioral Deficits and Neuroinflammatory Dynamics. J Neurotrauma 2020; 37:2718-2732. [DOI: 10.1089/neu.2020.7195] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Affiliation(s)
- Eric Eyolfson
- Department of Psychology, University of Calgary, Calgary, Alberta, Canada
- Alberta Children's Hospital Research Institute (ACHRI), Calgary, Alberta, Canada
| | - Thomas Carr
- Alberta Children's Hospital Research Institute (ACHRI), Calgary, Alberta, Canada
- Department of Cell Biology and Anatomy, University of Calgary, Calgary, Alberta, Canada
- Hotchkiss Brain Institute (HBI), University of Calgary, Calgary, Alberta, Canada
| | - Asher Khan
- Alberta Children's Hospital Research Institute (ACHRI), Calgary, Alberta, Canada
- Department of Cell Biology and Anatomy, University of Calgary, Calgary, Alberta, Canada
- Hotchkiss Brain Institute (HBI), University of Calgary, Calgary, Alberta, Canada
| | - David K. Wright
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, Victoria, Australia
| | - Richelle Mychasiuk
- Department of Psychology, University of Calgary, Calgary, Alberta, Canada
- Alberta Children's Hospital Research Institute (ACHRI), Calgary, Alberta, Canada
- Hotchkiss Brain Institute (HBI), University of Calgary, Calgary, Alberta, Canada
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, Victoria, Australia
| | - Alexander W. Lohman
- Alberta Children's Hospital Research Institute (ACHRI), Calgary, Alberta, Canada
- Department of Cell Biology and Anatomy, University of Calgary, Calgary, Alberta, Canada
- Hotchkiss Brain Institute (HBI), University of Calgary, Calgary, Alberta, Canada
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15
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Faroqi AH, Lim MJ, Kee EC, Lee JH, Burgess JD, Chen R, Di Virgilio F, Delenclos M, McLean PJ. In Vivo Detection of Extracellular Adenosine Triphosphate in a Mouse Model of Traumatic Brain Injury. J Neurotrauma 2020; 38:655-664. [PMID: 32935624 PMCID: PMC7898407 DOI: 10.1089/neu.2020.7226] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Traumatic brain injury (TBI) is traditionally characterized by primary and secondary injury phases, both contributing to pathological and morphological changes. The mechanisms of damage and chronic consequences of TBI remain to be fully elucidated, but synaptic homeostasis disturbances and impaired energy metabolism are proposed to be a major contributor. It has been proposed that an increase of extracellular (eATP) adenosine triphosphate (ATP) in the area immediately surrounding impact may play a pivotal role in this sequence of events. After tissue injury, rupture of cell membranes allows release of intracellular ATP into the extracellular space, triggering a cascade of toxic events and inflammation. ATP is a ubiquitous messenger; however, simple and reliable techniques to measure its concentration have proven elusive. Here, we integrate a sensitive bioluminescent eATP sensor known as pmeLUC, with a controlled cortical impact mouse model to monitor eATP changes in a living animal after injury. Using the pmeLUC probe, a rapid increase of eATP is observed proximal to the point of impact within minutes of the injury. This event is significantly attenuated when animals are pretreated with an ATP hydrolyzing agent (apyrase) before surgery, confirming the contribution of eATP. This new eATP reporter could be useful for understanding the role of eATP in the pathogenesis in TBI and may identify a window of opportunity for therapeutic intervention.
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Affiliation(s)
- Ayman H Faroqi
- Department of Neuroscience, Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic College of Medicine, Mayo Clinic, Jacksonville, Florida, USA.,Neuroscience PhD Program, Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic College of Medicine, Mayo Clinic, Jacksonville, Florida, USA
| | - Melina J Lim
- Department of Neuroscience, Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic College of Medicine, Mayo Clinic, Jacksonville, Florida, USA
| | - Emma C Kee
- Department of Neuroscience, Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic College of Medicine, Mayo Clinic, Jacksonville, Florida, USA
| | - Jannifer H Lee
- Department of Neuroscience, Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic College of Medicine, Mayo Clinic, Jacksonville, Florida, USA.,Neuroscience PhD Program, Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic College of Medicine, Mayo Clinic, Jacksonville, Florida, USA
| | - Jeremy D Burgess
- Department of Neuroscience, Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic College of Medicine, Mayo Clinic, Jacksonville, Florida, USA.,Neuroscience PhD Program, Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic College of Medicine, Mayo Clinic, Jacksonville, Florida, USA
| | - Ridong Chen
- APT Therapeutics, Inc., St. Louis, Missouri, USA
| | - Francesco Di Virgilio
- Department of Morphology Surgery and Experimental Medicine, University of Ferrara, Ferrara, Italy
| | - Marion Delenclos
- Department of Neuroscience, Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic College of Medicine, Mayo Clinic, Jacksonville, Florida, USA
| | - Pamela J McLean
- Department of Neuroscience, Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic College of Medicine, Mayo Clinic, Jacksonville, Florida, USA.,Neuroscience PhD Program, Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic College of Medicine, Mayo Clinic, Jacksonville, Florida, USA
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16
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Wang Y, Liu Y, Nham A, Sherbaf A, Quach D, Yahya E, Ranburger D, Bi X, Baudry M. Calpain-2 as a therapeutic target in repeated concussion-induced neuropathy and behavioral impairment. SCIENCE ADVANCES 2020; 6:6/27/eaba5547. [PMID: 32937436 PMCID: PMC7458466 DOI: 10.1126/sciadv.aba5547] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Accepted: 05/19/2020] [Indexed: 06/11/2023]
Abstract
Repeated concussion represents a serious health problem as it can result in various brain pathologies, ranging from minor focal tissue injury to severe chronic traumatic encephalopathy. The calcium-dependent protease, calpain, participates in the development of neurodegeneration following concussion, but there is no information regarding the relative contribution of calpain-1 and calpain-2, the major calpain isoforms in the brain. We used a mouse model of repeated concussions, which reproduces most of the behavioral and neuropathological features of the human condition, to address this issue. Deletion of calpain-2 or treatment with a selective calpain-2 inhibitor for 2 weeks prevented most of these neuropathological features. Changes in TAR DNA binding protein 43 (TDP-43) subcellular localization similar to those found in human amyotrophic lateral sclerosis and frontotemporal dementia were also prevented by deletion of calpain-2 or treatment with calpain-2 inhibitor. Our results indicate that a selective calpain-2 inhibitor represents a therapeutic approach for concussion.
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Affiliation(s)
- Yubin Wang
- Graduate College of Biomedical Sciences, Western University of Health Sciences, Pomona, CA 91766, USA
| | - Yan Liu
- Graduate College of Biomedical Sciences, Western University of Health Sciences, Pomona, CA 91766, USA
| | - Amy Nham
- Graduate College of Biomedical Sciences, Western University of Health Sciences, Pomona, CA 91766, USA
| | - Arash Sherbaf
- Graduate College of Biomedical Sciences, Western University of Health Sciences, Pomona, CA 91766, USA
| | - Diana Quach
- Graduate College of Biomedical Sciences, Western University of Health Sciences, Pomona, CA 91766, USA
| | - Emad Yahya
- Graduate College of Biomedical Sciences, Western University of Health Sciences, Pomona, CA 91766, USA
| | - Davis Ranburger
- Graduate College of Biomedical Sciences, Western University of Health Sciences, Pomona, CA 91766, USA
| | - Xiaoning Bi
- College of Osteopathic Medicine of the Pacific, Western University of Health Sciences, Pomona, CA 91766, USA
| | - Michel Baudry
- Graduate College of Biomedical Sciences, Western University of Health Sciences, Pomona, CA 91766, USA.
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17
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He J, Russell T, Qiu X, Hao F, Kyle M, Chin L, Zhao LR. The contribution of stem cell factor and granulocyte colony-stimulating factor in reducing neurodegeneration and promoting neurostructure network reorganization after traumatic brain injury. Brain Res 2020; 1746:147000. [PMID: 32579949 DOI: 10.1016/j.brainres.2020.147000] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 06/16/2020] [Accepted: 06/17/2020] [Indexed: 01/03/2023]
Abstract
Traumatic brain injury (TBI) is a major cause of death and disability in young adults worldwide. TBI-induced long-term cognitive deficits represent a growing clinical problem. Stem cell factor (SCF) and granulocyte colony-stimulating factor (G-CSF) are involved in neuroprotection and neuronal plasticity. However, the knowledge concerning reparative efficacy of SCF + G-CSF treatment in post-acute TBI recovery remains incomplete. This study aims to determine the efficacy of SCF + G-CSF on post-acute TBI recovery in young adult mice. The controlled cortical impact model of TBI was used for inducing a severe damage in the motor cortex of the right hemisphere in 8-week-old male C57BL mice. SCF + G-CSF treatment was initiated 3 weeks after induction of TBI. Severe TBI led to persistent motor functional deficits (Rota-Rod test) and impaired spatial learning function (water maze test). SCF + G-CSF treatment significantly improved the severe TBI-impaired spatial learning function 6 weeks after treatment. TBI also caused significant increases of Fluoro-Jade C positive degenerating neurons in bilateral frontal cortex, striatum and hippocampus, and significant reductions in MAP2+ apical dendrites and overgrowth of SMI312+ axons in peri-TBI cavity frontal cortex and in the ipsilateral hippocampal CA1 at 24 weeks post-TBI. SCF + G-CSF treatment significantly reduced TBI-induced neurodegeneration in the contralateral frontal cortex and hippocampal CA1, increased MAP2+ apical dendrites in the peri-TBI cavity frontal cortex, and prevented TBI-induced axonal overgrowth in both the peri-TBI cavity frontal cortex and ipsilateral hippocampal CA1.These findings reveal a novel pathology of axonal overgrowth after severe TBI and demonstrate a therapeutic potential of SCF + G-CSF in ameliorating severe TBI-induced long-term neuronal pathology, neurostructural network malformation, and impairments in spatial learning.
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Affiliation(s)
- Junchi He
- Department of Neurosurgery, State University of New York Upstate Medical University, Syracuse, NY 13210, USA
| | - Thomas Russell
- Department of Neurosurgery, State University of New York Upstate Medical University, Syracuse, NY 13210, USA
| | - Xuecheng Qiu
- Department of Neurosurgery, State University of New York Upstate Medical University, Syracuse, NY 13210, USA
| | - Fei Hao
- Department of Neurosurgery, State University of New York Upstate Medical University, Syracuse, NY 13210, USA
| | - Michele Kyle
- Department of Neurosurgery, State University of New York Upstate Medical University, Syracuse, NY 13210, USA
| | - Lawrence Chin
- Department of Neurosurgery, State University of New York Upstate Medical University, Syracuse, NY 13210, USA
| | - Li-Ru Zhao
- Department of Neurosurgery, State University of New York Upstate Medical University, Syracuse, NY 13210, USA.
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18
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Vigil FA, Bozdemir E, Bugay V, Chun SH, Hobbs M, Sanchez I, Hastings SD, Veraza RJ, Holstein DM, Sprague SM, M Carver C, Cavazos JE, Brenner R, Lechleiter JD, Shapiro MS. Prevention of brain damage after traumatic brain injury by pharmacological enhancement of KCNQ (Kv7, "M-type") K + currents in neurons. J Cereb Blood Flow Metab 2020; 40:1256-1273. [PMID: 31272312 PMCID: PMC7238379 DOI: 10.1177/0271678x19857818] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Nearly three million people in the USA suffer traumatic brain injury (TBI) yearly; however, there are no pre- or post-TBI treatment options available. KCNQ2-5 voltage-gated K+ channels underlie the neuronal "M current", which plays a dominant role in the regulation of neuronal excitability. Our strategy towards prevention of TBI-induced brain damage is predicated on the suggested hyper-excitability of neurons induced by TBIs, and the decrease in neuronal excitation upon pharmacological augmentation of M/KCNQ K+ currents. Seizures are very common after a TBI, making further seizures and development of epilepsy disease more likely. Our hypothesis is that TBI-induced hyperexcitability and ischemia/hypoxia lead to metabolic stress, cell death and a maladaptive inflammatory response that causes further downstream morbidity. Using the mouse controlled closed-cortical impact blunt TBI model, we found that systemic administration of the prototype M-channel "opener", retigabine (RTG), 30 min after TBI, reduces the post-TBI cascade of events, including spontaneous seizures, enhanced susceptibility to chemo-convulsants, metabolic stress, inflammatory responses, blood-brain barrier breakdown, and cell death. This work suggests that acutely reducing neuronal excitability and energy demand via M-current enhancement may be a novel model of therapeutic intervention against post-TBI brain damage and dysfunction.
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Affiliation(s)
- Fabio A Vigil
- Department of Cellular and Integrative Physiology, University of Texas Health San Antonio, San Antonio, TX, USA
| | - Eda Bozdemir
- Department of Cell Systems and Anatomy, University of Texas Health San Antonio, San Antonio, TX, USA
| | - Vladislav Bugay
- Department of Cellular and Integrative Physiology, University of Texas Health San Antonio, San Antonio, TX, USA
| | - Sang H Chun
- Department of Cell Systems and Anatomy, University of Texas Health San Antonio, San Antonio, TX, USA
| | - MaryAnn Hobbs
- Department of Cellular and Integrative Physiology, University of Texas Health San Antonio, San Antonio, TX, USA
| | - Isamar Sanchez
- Department of Cellular and Integrative Physiology, University of Texas Health San Antonio, San Antonio, TX, USA
| | - Shayne D Hastings
- Department of Cellular and Integrative Physiology, University of Texas Health San Antonio, San Antonio, TX, USA
| | - Rafael J Veraza
- Department of Cellular and Integrative Physiology, University of Texas Health San Antonio, San Antonio, TX, USA
| | - Deborah M Holstein
- Department of Cell Systems and Anatomy, University of Texas Health San Antonio, San Antonio, TX, USA
| | - Shane M Sprague
- Department of Neurosurgery, University of Texas Health San Antonio, San Antonio, TX, USA
| | - Chase M Carver
- Department of Cellular and Integrative Physiology, University of Texas Health San Antonio, San Antonio, TX, USA
| | - Jose E Cavazos
- Department of Neurology, University of Texas Health San Antonio, San Antonio, TX, USA
| | - Robert Brenner
- Department of Cellular and Integrative Physiology, University of Texas Health San Antonio, San Antonio, TX, USA
| | - James D Lechleiter
- Department of Cell Systems and Anatomy, University of Texas Health San Antonio, San Antonio, TX, USA
| | - Mark S Shapiro
- Department of Cellular and Integrative Physiology, University of Texas Health San Antonio, San Antonio, TX, USA
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19
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Yin Z, Han Z, Hu T, Zhang S, Ge X, Huang S, Wang L, Yu J, Li W, Wang Y, Li D, Zhao J, Wang Y, Zuo Y, Li Y, Kong X, Chen F, Lei P. Neuron-derived exosomes with high miR-21-5p expression promoted polarization of M1 microglia in culture. Brain Behav Immun 2020; 83:270-282. [PMID: 31707083 DOI: 10.1016/j.bbi.2019.11.004] [Citation(s) in RCA: 90] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2019] [Revised: 11/02/2019] [Accepted: 11/06/2019] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Neuroinflammation is a characteristic pathological change of acute neurological deficit and chronic traumatic encephalopathy (CTE) after traumatic brain injury (TBI). Microglia are the key cell involved in neuroinflammation and neuronal injury. The type of microglia polarization determines the direction of neuroinflammation. MiR-21-5p elevated in neurons and microglia after TBI in our previous research. In this study, we explore the influence of miR-21-5p for neuroinflammation by regulating microglia polarization. METHODS In this study, PC12 and BV2 used to instead of neuron and microglia respectively. The co-cultured transwell system used to simulate interaction of PC12 and BV2 cells in vivo environment. RESULTS We found that PC12-derived exosomes with containing miR-21-5p were phagocytosed by microglia and induced microglia polarization, meanwhile, the expression of miR-21-5p was increased in M1 microglia cells. Polarization of M1 microglia aggravated the release of neuroinflammation factors, inhibited the neurite outgrowth, increased accumulation of P-tau and promoted the apoptosis of PC12 cells, which formed a model of cyclic cumulative damage. Simultaneously, we also got similar results in vivo experiments. CONCLUSIONS PC12-derived exosomes with containing miR-21-5p is the essential of this cyclic cumulative damage model. Therefore, regulating the expression of miR-21-5p or the secretion of exosomes may be an important novel strategy for the treatment of neuroinflammation after TBI.
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Affiliation(s)
- Zhenyu Yin
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China; Tianjin Institute of Geriatrics, Tianjin, China
| | - Zhaoli Han
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China; Tianjin Institute of Geriatrics, Tianjin, China
| | - Tianpeng Hu
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China; Tianjin Institute of Geriatrics, Tianjin, China
| | - Shishuang Zhang
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China; Tianjin Institute of Geriatrics, Tianjin, China
| | - Xintong Ge
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin, China
| | - Shan Huang
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China; Tianjin Institute of Geriatrics, Tianjin, China
| | - Lu Wang
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China; Tianjin Institute of Geriatrics, Tianjin, China
| | - Jinwen Yu
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China; Tianjin Institute of Geriatrics, Tianjin, China
| | - Wenzhu Li
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China; Tianjin Institute of Geriatrics, Tianjin, China
| | - Yan Wang
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China; Tianjin Institute of Geriatrics, Tianjin, China
| | - Dai Li
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China; Tianjin Institute of Geriatrics, Tianjin, China
| | - Jing Zhao
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China; Tianjin Institute of Geriatrics, Tianjin, China
| | - Yifeng Wang
- Department of Critical Care Medicine, Tianjin Medical University General Hospital, Tianjin, China
| | - Yan Zuo
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China; Tianjin Institute of Geriatrics, Tianjin, China
| | - Ying Li
- Tianjin Neurological Institute, Tianjin, China
| | - Xiaodong Kong
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China; Tianjin Institute of Geriatrics, Tianjin, China
| | | | - Ping Lei
- Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, China; Tianjin Institute of Geriatrics, Tianjin, China.
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Ge X, Guo M, Hu T, Li W, Huang S, Yin Z, Li Y, Chen F, Zhu L, Kang C, Jiang R, Lei P, Zhang J. Increased Microglial Exosomal miR-124-3p Alleviates Neurodegeneration and Improves Cognitive Outcome after rmTBI. Mol Ther 2019; 28:503-522. [PMID: 31843449 PMCID: PMC7001001 DOI: 10.1016/j.ymthe.2019.11.017] [Citation(s) in RCA: 124] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 11/10/2019] [Accepted: 11/21/2019] [Indexed: 01/20/2023] Open
Abstract
Repetitive mild traumatic brain injury (rmTBI) is considered to be an important risk factor for long-term neurodegenerative disorders such as Alzheimer's disease, which is characterized by β-amyloid abnormalities and impaired cognitive function. Microglial exosomes have been reported to be involved in the transportation, distribution, and clearance of β-amyloid in Alzheimer's disease. However, their impacts on the development of neurodegeneration after rmTBI are not yet known. The role of miRNAs in microglial exosomes on regulating post-traumatic neurodegeneration was investigated in the present study. We demonstrated that miR-124-3p level in microglial exosomes from injured brain was significantly altered in the acute, sub-acute, and chronic phases after rmTBI. In in vitro experiments, microglial exosomes with upregulated miR-124-3p (EXO-124) alleviated neurodegeneration in repetitive scratch-injured neurons. The effects were exerted by miR-124-3p targeting Rela, an inhibitory transcription factor of ApoE that promotes the β-amyloid proteolytic breakdown, thereby inhibiting β-amyloid abnormalities. In mice with rmTBI, the intravenously injected microglial exosomes were taken up by neurons in injured brain. Besides, miR-124-3p in the exosomes was transferred into hippocampal neurons and alleviated neurodegeneration by targeting the Rela/ApoE signaling pathway. Consequently, EXO-124 treatments improved the cognitive outcome after rmTBI, suggesting a promising therapeutic strategy for future clinical translation.
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Affiliation(s)
- Xintong Ge
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin 300052, China; Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin Neurological Institute, Tianjin 300052, China; Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Tianjin Neurological Institute, Tianjin 300052, China
| | - Mengtian Guo
- Laboratory of Neuro-Trauma and Neurodegenerative Disorders, Tianjin Geriatrics Institute, Tianjin 300052, China; Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Tianpeng Hu
- Laboratory of Neuro-Trauma and Neurodegenerative Disorders, Tianjin Geriatrics Institute, Tianjin 300052, China; Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Wenzhu Li
- Laboratory of Neuro-Trauma and Neurodegenerative Disorders, Tianjin Geriatrics Institute, Tianjin 300052, China; Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Shan Huang
- Laboratory of Neuro-Trauma and Neurodegenerative Disorders, Tianjin Geriatrics Institute, Tianjin 300052, China; Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Zhenyu Yin
- Laboratory of Neuro-Trauma and Neurodegenerative Disorders, Tianjin Geriatrics Institute, Tianjin 300052, China; Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Ying Li
- Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin Neurological Institute, Tianjin 300052, China; Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Tianjin Neurological Institute, Tianjin 300052, China
| | - Fanglian Chen
- Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin Neurological Institute, Tianjin 300052, China; Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Tianjin Neurological Institute, Tianjin 300052, China
| | - Luoyun Zhu
- Department of Medical Examination, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Chunsheng Kang
- Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin Neurological Institute, Tianjin 300052, China; Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Tianjin Neurological Institute, Tianjin 300052, China
| | - Rongcai Jiang
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin 300052, China; Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin Neurological Institute, Tianjin 300052, China; Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Tianjin Neurological Institute, Tianjin 300052, China.
| | - Ping Lei
- Laboratory of Neuro-Trauma and Neurodegenerative Disorders, Tianjin Geriatrics Institute, Tianjin 300052, China; Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin 300052, China.
| | - Jianning Zhang
- Department of Neurosurgery, Tianjin Medical University General Hospital, Tianjin 300052, China; Key Laboratory of Injuries, Variations and Regeneration of Nervous System, Tianjin Neurological Institute, Tianjin 300052, China; Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Tianjin Neurological Institute, Tianjin 300052, China.
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Tsai SJ. Preventive potential of low intensity pulsed ultrasound for chronic traumatic encephalopathy after repetitive head collisions in contact sports. Med Hypotheses 2019; 134:109422. [PMID: 31654885 DOI: 10.1016/j.mehy.2019.109422] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 09/29/2019] [Accepted: 10/09/2019] [Indexed: 01/25/2023]
Abstract
Chronic traumatic encephalopathy (CTE), a disease process well-recognized in boxers, American football players and military personnel, is a progressive neurodegenerative disease caused by repetitive blows to the head. Subjects with CTE can have a wide range of emotional, cognitive and physical symptoms. The cognitive group patients had a significantly higher probability of developing dementia in later years. Currently, there are no disease modifying regimen for CTE. Timely intervention of head blow could diminish the development of CTE. Low-intensity pulsed ultrasound (LIPUS) is a common adjunct used to promote bone healing for fresh fracture. Recent reports suggest that LIPUS can noninvasively modulate the cortical function and have neuroprotective effect in various animal models of traumatic brain injury, stroke, Alzheimer's disease and major depressive disorder. The multifunctional mechanisms of LIPUS neuroprotective effect include several trophic factor stimulations, anti-inflammatory properties and reduction of brain edema. From the above evidence, LIPUS intervention could be a strategy for the prevention of the clinical CTE sequelae of repetitive head blows. We hypothesized that due to its neuroprotective effects, the non-invasive and easy-to-use method of LIPUS brain stimulation could have a preventive effect on players who have head blows during the match. The development of a time sensitive protocol, resembling the therapeutic algorithm for traumatic brain injury, would potentially prevent the development of subsequent CTE adverse outcome. Further long-term longitudinal studies of LIPUS stimulation are warranted to verify the prevention efficacy of this intervention for CTE.
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Affiliation(s)
- Shih-Jen Tsai
- Department of Psychiatry, Taipei Veterans General Hospital, Taiwan; Division of Psychiatry, School of Medicine, National Yang-Ming University, Taiwan; Brain Research Center, National Yang-Ming University, Taiwan.
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Increases in miR-124-3p in Microglial Exosomes Confer Neuroprotective Effects by Targeting FIP200-Mediated Neuronal Autophagy Following Traumatic Brain Injury. Neurochem Res 2019; 44:1903-1923. [PMID: 31190315 DOI: 10.1007/s11064-019-02825-1] [Citation(s) in RCA: 80] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Revised: 06/04/2019] [Accepted: 06/07/2019] [Indexed: 12/19/2022]
Abstract
In our recent study, we observed consistent increases in miR-124-3p levels in exosomes derived from cultured BV2 microglia which was treated with repetitive traumatic brain injury (rTBI) mouse model brain extracts. To clarify the mechanisms underlying increases in microglia-derived exosomal miR-124-3p and their role in regulating neuronal autophagy after TBI, we investigated the impact of exosomal miR-124-3p on neuronal autophagy in scratch-injured HT22 neurons and rTBI mice. We harvested injured brain extracts from rTBI mice at 3 to 21 days post injury (DPI) for the treatment of cultured BV2 microglia in vitro. We observed significant induction of autophagy following TBI in vitro, and that inhibition of activated neuronal autophagy could protect against trauma-induced injury. Our results indicated that co-culture of injured HT22 neurons with miR-124-3p overexpressing BV2 microglia exerted a protective effect by inhibiting neuronal autophagy in scratch-injured neurons. Further research revealed that these effects were achieved mainly via upregulation of exosomal miR-124-3p, and that Focal adhesion kinase family-interacting protein of 200 kDa (FIP200) plays a key role in trauma-induced autophagy. Injection of exosomes into the vena caudalis in in vivo experiments revealed that exosomal miR-124-3p was associated with decreases in the modified neurological severity score (mNSS) and improvements in Morris water maze (MWM) test results in rTBI mice. Altogether, our results indicate that increased miR-124-3p in microglial exosomes following TBI may inhibit neuronal autophagy and protect against nerve injury via their transfer into neurons. Thus, treatment with microglial exosomes enriched with miR-124-3p may represent a novel therapeutic strategy for the treatment of nerve injury after TBI.
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23
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Kuan CY, Lin YY, Chen CY, Yang CC, Chi CY, Li CH, Dong GC, Lin FH. The preparation of oxidized methylcellulose crosslinked by adipic acid dihydrazide loaded with vitamin C for traumatic brain injury. J Mater Chem B 2019. [DOI: 10.1039/c9tb00816k] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Oxi-MC-ADH-VC can open up a new avenue for clinical TBI treatment and rehabilitation.
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Affiliation(s)
- Che-Yung Kuan
- PhD Program in Tissue Engineering and Regenerative Medicine
- National Chung Hsing University
- Taiwan
- Institute of Biomedical Engineering and Nanomedicine
- National Health Research Institutes
| | - Yu-Ying Lin
- PhD Program in Tissue Engineering and Regenerative Medicine
- National Chung Hsing University
- Taiwan
- Institute of Biomedical Engineering and Nanomedicine
- National Health Research Institutes
| | - Ching-Yun Chen
- Institute of Biomedical Engineering and Nanomedicine
- National Health Research Institutes
- Taiwan
| | - Chun-Chen Yang
- Institute of Biomedical Engineering
- College of Medicine and College of Engineering
- National Taiwan University
- Taipei
- Taiwan
| | - Chih-Ying Chi
- PhD Program in Tissue Engineering and Regenerative Medicine
- National Chung Hsing University
- Taiwan
- Institute of Biomedical Engineering and Nanomedicine
- National Health Research Institutes
| | - Chi-Han Li
- PhD Program in Tissue Engineering and Regenerative Medicine
- National Chung Hsing University
- Taiwan
- Institute of Biomedical Engineering and Nanomedicine
- National Health Research Institutes
| | - Guo-Chung Dong
- PhD Program in Tissue Engineering and Regenerative Medicine
- National Chung Hsing University
- Taiwan
- Institute of Biomedical Engineering and Nanomedicine
- National Health Research Institutes
| | - Feng-Huei Lin
- PhD Program in Tissue Engineering and Regenerative Medicine
- National Chung Hsing University
- Taiwan
- Institute of Biomedical Engineering and Nanomedicine
- National Health Research Institutes
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