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Nolt M, Connor J. Implications of Iron in Ferroptosis, Necroptosis, and Pyroptosis as Potential Players in TBI Morbidity and Mortality. ASN Neuro 2024; 16:2394352. [PMID: 39249102 DOI: 10.1080/17590914.2024.2394352] [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: 09/10/2024] Open
Abstract
Iron is a critical transition metal required to sustain a healthy central nervous system. Iron is involved in metabolic reactions, enzymatic activity, myelinogenesis, and oxygen transport. However, in several pathological conditions such as cancer, neurodegeneration, and neurotrauma iron becomes elevated. Excessive iron can have deleterious effects leading to reactive oxygen species (ROS) via the Fenton reaction. Iron-derived ROS are known to drive several mechanisms such as cell death pathways including ferroptosis, necroptosis, and pyroptosis. Excessive iron present in the post-traumatic brain could trigger these harmful pathways potentiating the high rates of morbidity and mortality. In the present review, we will discuss how iron plays an intricate role in initiating ferroptosis, necroptosis, and pyroptosis, examine their potential link to traumatic brain injury morbidity and mortality, and suggest therapeutic targets.
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Affiliation(s)
- Makenzie Nolt
- Neurosurgery Department, Pennsylvania State University College of Medicine, Hershey, Pennsylvania, USA
| | - James Connor
- Neurosurgery Department, Pennsylvania State University College of Medicine, Hershey, Pennsylvania, USA
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Yang HC, Nguyen T, Naugle KM, White FA, Wu YC. White matter microstructural changes in post-traumatic headache: A diffusion tensor imaging (DTI) study. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2024:2024.08.05.24310944. [PMID: 39211879 PMCID: PMC11361253 DOI: 10.1101/2024.08.05.24310944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/04/2024]
Abstract
Introduction Post-traumatic headache (PTH) is a common consequence of mild traumatic brain injury (mTBI) that can severely impact an individual's quality of life and rehabilitation. However, the underlying neuropathogenesis mechanisms contributing to PTH are still poorly understood. This study utilized diffusion tensor imaging (DTI) to detect microstructural alterations in the brains of mTBI participants with or at risk of developing PTH. Method This study investigated associations between DTI metrics 1-month postinjury and pain sensitivity, as well as psychological assessments 6-months postinjury to identify differences between mTBI (n = 12) and healthy controls (HC; n = 10). MRI scans, including T1-weighted anatomical imaging and DTI were acquired at 1-month postinjury. Pain sensitivity assays included quantitative sensory testing and psychological assessment questionnaires at 1-month and 6-months postinjury. Results Significant aberrations of mean axial diffusivity in the forceps major were observed in mTBI relative to HCs at 1-month postinjury (p =0.02). Within the mTBI group, DTI metrics at 1-month postinjury were significantly associated (p's < 0.05) with pain-related measures and psychological outcomes at 6-month postinjury in several white matter tracts (right sagittal stratum, left anterior thalamic radiation, left corticospinal tract, left insula, left superior longitudinal fasciculus). Notably, the associations between DTI metrics at 1-month postinjury and pain-related measures at 6-month postinjury showed significant group differences in the right sagittal stratum (p's < 0.01), white matter tract in left insula (p < 0.04), and left superior longitudinal fasciculus (p's < 0.05). Conclusion This study suggests that "Post-Traumatic Stress Disorder for DSM-5" and "Center for Epidemiological Studies-Depression Scale" are the most sensitive psychological measures to early microstructural changes after mTBI, and that the DTI metrics are predictive of pain and psychological measures in mTBI. Together, these results suggest that white matter microstructure plays an important role in the PTH following mTBI.
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Saboori M, Riazi A, Taji M, Yadegarfar G. Traumatic brain injury and stem cell treatments: A review of recent 10 years clinical trials. Clin Neurol Neurosurg 2024; 239:108219. [PMID: 38471197 DOI: 10.1016/j.clineuro.2024.108219] [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: 10/31/2023] [Revised: 02/28/2024] [Accepted: 02/29/2024] [Indexed: 03/14/2024]
Abstract
Traumatic brain injury (TBI) is damage to the brain by an external physical force. It may result in cognitive and physical dysfunction. It is one of the main causes of disability and death all around the world. In 2016, the worldwide incidence of acute TBI was nearly 27 million cases. Therapeutic interventions currently in use provide poor outcomes. So recent research has focused on stem cells as a potential treatment. The major objective of this study was to conduct a systematic review of the recent clinical trials in the field of stem cell transplantation for patients with TBI. The Cochrane Library, Web of Science, SCOPUS, PubMed and also Google Scholar were searched for relevant terms such as "traumatic brain injury", " brain trauma", "brain injury", "head injury", "TBI", "stem cell", and "cell transplantation" and for publications from January 2013 to June 2023. Clinical trials and case series which utilized stem cells for TBI treatment were included. The data about case selection and sample size, mechanism of injury, time between primary injury and cell transplantation, type of stem cells transplanted, route of stem cell administration, number of cells transplanted, episodes of transplantation, follow-up time, outcome measures and results, and adverse events were extracted. Finally, 11 studies met the defined criteria and were included in the review. The total sample size of all studies was 402, consisting of 249 cases of stem cell transplantation and 153 control subjects. The most commonly used cells were BMMNCs, the preferred route of transplantation was intrathecal transplantation, and all studies reported improvement in clinical, radiologic, or biochemical markers after transplantation. No serious adverse events were reported. Stem cell therapy is safe and logistically feasible and leads to neurological improvement in patients with traumatic brain injury. However, further controlled, randomized, multicenter studies with large sample sizes are needed to determine the optimal cell and dose, timing of transplantation in acute or chronic phases of TBI, and the optimal route and number of transplants.
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Affiliation(s)
- Masih Saboori
- Department of Neurosurgery, School of Medicine, Isfahan University of Medical Sciences, Isfahan, the Islamic Republic of Iran
| | - Ali Riazi
- Department of Neurosurgery, School of Medicine, Isfahan University of Medical Sciences, Isfahan, the Islamic Republic of Iran
| | - Mohammadreza Taji
- Department of Neurosurgery, School of Medicine, Isfahan University of Medical Sciences, Isfahan, the Islamic Republic of Iran.
| | - Ghasem Yadegarfar
- Department of Epidemiology and Biostatistics, Health School, Isfahan University of Medical Sciences, Isfahan, the Islamic Republic of Iran
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Wang S, Liu A, Xu C, Hou J, Hong J. GLP-1(7-36) protected against oxidative damage and neuronal apoptosis in the hippocampal CA region after traumatic brain injury by regulating ERK5/CREB. Mol Biol Rep 2024; 51:313. [PMID: 38374452 PMCID: PMC10876747 DOI: 10.1007/s11033-024-09244-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Accepted: 01/11/2024] [Indexed: 02/21/2024]
Abstract
BACKGROUND Glucagon-like peptide-1 (GLP-1) (7-36) amide, an endogenous active form of GLP-1, has been shown to modulate oxidative stress and neuronal cell survival in various neurological diseases. OBJECTIVE This study investigated the potential effects of GLP-1(7-36) on oxidative stress and apoptosis in neuronal cells following traumatic brain injury (TBI) and explored the underlying mechanisms. METHODS Traumatic brain injury (TBI) models were established in male SD rats for in vivo experiments. The extent of cerebral oedema was assessed using wet-to-dry weight ratios following GLP-1(7-36) intervention. Neurological dysfunction and cognitive impairment were evaluated through behavioural experiments. Histopathological changes in the brain were observed using haematoxylin and eosin staining. Oxidative stress levels in hippocampal tissues were measured. TUNEL staining and Western blotting were employed to examine cell apoptosis. In vitro experiments evaluated the extent of oxidative stress and neural apoptosis following ERK5 phosphorylation activation. Immunofluorescence colocalization of p-ERK5 and NeuN was analysed using immunofluorescence cytochemistry. RESULTS Rats with TBI exhibited neurological deterioration, increased oxidative stress, and enhanced apoptosis, which were ameliorated by GLP-1(7-36) treatment. Notably, GLP-1(7-36) induced ERK5 phosphorylation in TBI rats. However, upon ERK5 inhibition, oxidative stress and neuronal apoptosis levels were elevated, even in the presence of GLP-1(7-36). CONCLUSION In summary, this study suggested that GLP-1(7-36) suppressed oxidative damage and neuronal apoptosis after TBI by activating ERK5/CREB.
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Affiliation(s)
- Shuwei Wang
- Department of Neurosurgery, Tangshan Gongren Hospital, Tangshan, 063000, Hebei, China
| | - Aijun Liu
- Department of Neurosurgery, Tangshan Gongren Hospital, Tangshan, 063000, Hebei, China
| | - Chaopeng Xu
- Department of Neurosurgery, Tangshan Gongren Hospital, Tangshan, 063000, Hebei, China
| | - Jingxuan Hou
- Department of Neurosurgery, Tangshan Gongren Hospital, Tangshan, 063000, Hebei, China
| | - Jun Hong
- Department of Neurosurgery, Tangshan Gongren Hospital, Tangshan, 063000, Hebei, China.
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Harris JP, Mietus CJ, Browne KD, Wofford KL, Keating CE, Brown DP, Johnson BN, Wolf JA, Smith DH, Cohen AS, Duda JE, Cullen DK. Neuronal somatic plasmalemmal permeability and dendritic beading caused by head rotational traumatic brain injury in pigs-An exploratory study. Front Cell Neurosci 2023; 17:1055455. [PMID: 37519631 PMCID: PMC10381956 DOI: 10.3389/fncel.2023.1055455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Accepted: 06/23/2023] [Indexed: 08/01/2023] Open
Abstract
Closed-head traumatic brain injury (TBI) is induced by rapid motion of the head, resulting in diffuse strain fields throughout the brain. The injury mechanism(s), loading thresholds, and neuroanatomical distribution of affected cells remain poorly understood, especially in the gyrencephalic brain. We utilized a porcine model to explore the relationships between rapid head rotational acceleration-deceleration loading and immediate alterations in plasmalemmal permeability within cerebral cortex, sub-cortical white matter, and hippocampus. To assess plasmalemmal compromise, Lucifer yellow (LY), a small cell-impermeant dye, was delivered intraventricularly and diffused throughout the parenchyma prior to injury in animals euthanized at 15-min post-injury; other animals (not receiving LY) were survived to 8-h or 7-days. Plasmalemmal permeability preferentially occurred in neuronal somata and dendrites, but rarely in white matter axons. The burden of LY+ neurons increased based on head rotational kinematics, specifically maximum angular velocity, and was exacerbated by repeated TBI. In the cortex, LY+ cells were prominent in both the medial and lateral gyri. Neuronal membrane permeability was observed within the hippocampus and entorhinal cortex, including morphological changes such as beading in dendrites. These changes correlated with reduced fiber volleys and synaptic current alterations at later timepoints in the hippocampus. Further histological observations found decreased NeuN immunoreactivity, increased mitochondrial fission, and caspase pathway activation in both LY+ and LY- cells, suggesting the presence of multiple injury phenotypes. This exploratory study suggests relationships between plasmalemmal disruptions in neuronal somata and dendrites within cortical and hippocampal gray matter as a primary response in closed-head rotational TBI and sets the stage for future, traditional hypothesis-testing experiments.
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Affiliation(s)
- James P. Harris
- Center for Brain Injury and Repair, Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
- Center for Neurotrauma, Neurodegeneration and Restoration, Corporal Michael J. Crescenz Veterans Affairs Medical Center, Philadelphia, PA, United States
| | - Constance J. Mietus
- Center for Brain Injury and Repair, Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - Kevin D. Browne
- Center for Brain Injury and Repair, Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
- Center for Neurotrauma, Neurodegeneration and Restoration, Corporal Michael J. Crescenz Veterans Affairs Medical Center, Philadelphia, PA, United States
| | - Kathryn L. Wofford
- Center for Brain Injury and Repair, Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
- Center for Neurotrauma, Neurodegeneration and Restoration, Corporal Michael J. Crescenz Veterans Affairs Medical Center, Philadelphia, PA, United States
| | - Carolyn E. Keating
- Center for Brain Injury and Repair, Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
- Center for Neurotrauma, Neurodegeneration and Restoration, Corporal Michael J. Crescenz Veterans Affairs Medical Center, Philadelphia, PA, United States
| | - Daniel P. Brown
- Center for Brain Injury and Repair, Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
- Center for Neurotrauma, Neurodegeneration and Restoration, Corporal Michael J. Crescenz Veterans Affairs Medical Center, Philadelphia, PA, United States
| | - Brian N. Johnson
- Department of Anesthesiology and Critical Care Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
- Research Institute, Children’s Hospital of Philadelphia, Philadelphia, PA, United States
| | - John A. Wolf
- Center for Brain Injury and Repair, Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
- Center for Neurotrauma, Neurodegeneration and Restoration, Corporal Michael J. Crescenz Veterans Affairs Medical Center, Philadelphia, PA, United States
| | - Douglas H. Smith
- Center for Brain Injury and Repair, Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - Akiva S. Cohen
- Department of Anesthesiology and Critical Care Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
- Research Institute, Children’s Hospital of Philadelphia, Philadelphia, PA, United States
| | - John E. Duda
- Center for Neurotrauma, Neurodegeneration and Restoration, Corporal Michael J. Crescenz Veterans Affairs Medical Center, Philadelphia, PA, United States
- Department of Neurology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - D. Kacy Cullen
- Center for Brain Injury and Repair, Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
- Center for Neurotrauma, Neurodegeneration and Restoration, Corporal Michael J. Crescenz Veterans Affairs Medical Center, Philadelphia, PA, United States
- Department of Bioengineering, School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, PA, United States
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Silvestro S, Mazzon E. Nrf2 Activation: Involvement in Central Nervous System Traumatic Injuries. A Promising Therapeutic Target of Natural Compounds. Int J Mol Sci 2022; 24:199. [PMID: 36613649 PMCID: PMC9820431 DOI: 10.3390/ijms24010199] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 12/15/2022] [Accepted: 12/19/2022] [Indexed: 12/24/2022] Open
Abstract
Central nervous system (CNS) trauma, such as traumatic brain injury (TBI) and spinal cord injury (SCI), represents an increasingly important health burden in view of the preventability of most injuries and the complex and expensive medical care that they necessitate. These injuries are characterized by different signs of neurodegeneration, such as oxidative stress, mitochondrial dysfunction, and neuronal apoptosis. Cumulative evidence suggests that the transcriptional factor nuclear factor erythroid 2-related factor 2 (Nrf2) plays a crucial defensive role in regulating the antioxidant response. It has been demonstrated that several natural compounds are able to activate Nrf2, mediating its antioxidant response. Some of these compounds have been tested in experimental models of SCI and TBI, showing different neuroprotective properties. In this review, an overview of the preclinical studies that highlight the positive effects of natural bioactive compounds in SCI and TBI experimental models through the activation of the Nrf2 pathway has been provided. Interestingly, several natural compounds can activate Nrf2 through multiple pathways, inducing a strong antioxidant response against CNS trauma. Therefore, some of these compounds could represent promising therapeutic strategies for these pathological conditions.
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Affiliation(s)
| | - Emanuela Mazzon
- IRCCS Centro Neurolesi “Bonino-Pulejo”, Via Provinciale Palermo, Contrada Casazza, 98124 Messina, Italy
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Mustafi SM, Yang HC, Harezlak J, Meier TB, Brett BL, Giza CC, Goldman J, Guskiewicz KM, Mihalik JP, LaConte SM, Duma SM, Broglio SP, McCrea MA, McAllister TW, Wu YC. Effects of White-Matter Tract Length in Sport-Related Concussion: A Tractography Study from the NCAA-DoD CARE Consortium. J Neurotrauma 2022; 39:1495-1506. [PMID: 35730116 PMCID: PMC9689766 DOI: 10.1089/neu.2021.0239] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Sport-related concussion (SRC) is an important public health issue. White-matter alterations after SRC are widely studied by neuroimaging approaches, such as diffusion magnetic resonance imaging (MRI). Although the exact anatomical location of the alterations may differ, significant white-matter alterations are commonly observed in long fiber tracts, but are never proven. In the present study, we performed streamline tractography to characterize the association between tract length and white-matter microstructural alterations after SRC. Sixty-eight collegiate athletes diagnosed with acute concussion (24-48 h post-injury) and 64 matched contact-sport controls were included in this study. The athletes underwent diffusion tensor imaging (DTI) in 3.0 T MRI scanners across three study sites. DTI metrics were used for tract-based spatial statistics to map white-matter regions-of-interest (ROIs) with significant group differences. Whole-brain white-mater streamline tractography was performed to extract "affected" white-matter streamlines (i.e., streamlines passing through the identified ROIs). In the concussed athletes, streamline counts and DTI metrics of the affected white-matter fiber tracts were summarized and compared with unaffected white-matter tracts across tract length in the same participant. The affected white-matter tracts had a high streamline count at length of 80-100 mm and high length-adjusted affected ratio for streamline length longer than 80 mm. DTI mean diffusivity was higher in the affected streamlines longer than 100 mm with significant associations with the Brief Symptom Inventory score. Our findings suggest that long fibers in the brains of collegiate athletes are more vulnerable to acute SRC with higher mean diffusivity and a higher affected ratio compared with the whole distribution.
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Affiliation(s)
- Sourajit M. Mustafi
- Institute of Genetics, San Diego, California, USA
- Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Ho-Ching Yang
- Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Jaroslaw Harezlak
- Department of Epidemiology and Biostatistics, School of Public Health, Indiana University, Bloomington, Indiana, USA
| | - Timothy B. Meier
- Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - Benjamin L. Brett
- Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - Christopher C. Giza
- Department of Neurosurgery, David Geffen School of Medicine at University of California, Los Angeles, Los Angeles, California, USA
- Division of Pediatric Neurology, Mattel Children's Hospital, University of California, Los Angeles, Los Angeles, California, USA
| | - Joshua Goldman
- Family Medicine, Ronald Reagan UCLA Medical Center, UCLA Health - Santa Monica Medical Center, Los Angeles, California, USA
| | - Kevin M. Guskiewicz
- Matthew Gfeller Sport-Related Traumatic Brain Injury Research Center, Department of Exercise and Sport Science, University of North Carolina, at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Jason P. Mihalik
- Matthew Gfeller Sport-Related Traumatic Brain Injury Research Center, Department of Exercise and Sport Science, University of North Carolina, at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Stephen M. LaConte
- School of Biomedical Engineering and Sciences, Wake-Forest and Virginia Tech University, Blacksburg, Virginia, USA
- Virginia Tech Carilion Research Institute, Roanoke, Virginia, USA
| | - Stefan M. Duma
- School of Biomedical Engineering and Sciences, Wake-Forest and Virginia Tech University, Blacksburg, Virginia, USA
| | - Steven P. Broglio
- Michigan Concussion Center, School of Kinesiology, University of Michigan, Ann Arbor, Michigan, USA
| | - Michael A. McCrea
- Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - Thomas W. McAllister
- Department of Psychiatry, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Yu-Chien Wu
- Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, Indiana, USA
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8
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Shireen T, Sachs F, Hua SZ. Physical memory of astrocytes. Brain Res 2022; 1796:148076. [PMID: 36084692 DOI: 10.1016/j.brainres.2022.148076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 08/23/2022] [Accepted: 09/02/2022] [Indexed: 11/02/2022]
Abstract
Traumatic brain injury (TBI) is a major risk factor for development of neurodegenerative disorders later in life. Short, repetitive, mechanical impacts can lead to pathology that appears days or months later. The cells have a physical "memory" of mechanical events. The origin of this memory is not known. To examine the properties of this memory, we used a microfluidic chip to apply programmed fluid shear pulses to adherent adult rat astrocytes. These caused a transient rise in intracellular Ca2+. In response to repeated stimuli, 6 to 24 hrs apart, the Ca2+ response increased. This effect lasted longer than 24 hrs. The Ca2+ responses were more sensitive to the number of repetitions than to the rest time between stimuli. We found that inhibiting the Ca2+ influx during conditioning stimulus did not eliminate the stress potentiation, suggesting that mechanical deformation during the primary injury is accountable for the later response. The mechanical mechanism that triggers this long term "memory" may act by plastic deformation of the cytoskeleton.
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Affiliation(s)
- Tasnim Shireen
- Department of Mechanical and Aerospace Engineering, University at Buffalo, Buffalo, NY 14260, USA
| | - Frederick Sachs
- Department of Physiology and Biophysics, University at Buffalo, Buffalo, NY 14260, USA
| | - Susan Z Hua
- Department of Mechanical and Aerospace Engineering, University at Buffalo, Buffalo, NY 14260, USA; Department of Physiology and Biophysics, University at Buffalo, Buffalo, NY 14260, USA.
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Mito R, Parker DM, Abbott DF, Makdissi M, Pedersen M, Jackson GD. White matter abnormalities characterize the acute stage of sports-related mild traumatic brain injury. Brain Commun 2022; 4:fcac208. [PMID: 36043140 PMCID: PMC9419063 DOI: 10.1093/braincomms/fcac208] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 05/29/2022] [Accepted: 08/14/2022] [Indexed: 11/14/2022] Open
Abstract
Abstract
Sports-related concussion, a form of mild traumatic brain injury, is characterized by transient disturbances of brain function. There is increasing evidence that functional brain changes may be driven by subtle abnormalities in white matter microstructure, and diffusion MRI has been instrumental in demonstrating these white matter abnormalities in vivo. However, the reported location and direction of the observed white matter changes in mild traumatic brain injury are variable, likely attributable to the inherent limitations of the white matter models used. This cross-sectional study applies an advanced and robust technique known as fixel-based analysis to investigate fibre tract-specific abnormalities in professional Australian Football League players with a recent mild traumatic brain injury. We used the fixel-based analysis framework to identify common abnormalities found in specific fibre tracts in participants with an acute injury (≤12 days after injury; n = 14). We then assessed whether similar changes exist in subacute injury (>12 days and <3 months after injury; n = 15). The control group was 29 neurologically healthy control participants. We assessed microstructural differences in fibre density and fibre bundle morphology and performed whole-brain fixel-based analysis to compare groups. Subsequent tract-of-interest analyses were performed within five selected white matter tracts to investigate the relationship between the observed tract-specific abnormalities and days since injury and the relationship between these tract-specific changes with cognitive abnormalities. Our whole-brain analyses revealed significant increases in fibre density and bundle cross-section in the acute mild traumatic brain injury group when compared with controls. The acute mild traumatic brain injury group showed even more extensive differences when compared with the subacute injury group than with controls. The fibre structures affected in acute concussion included the corpus callosum, left prefrontal and left parahippocampal white matter. The fibre density and cross-sectional increases were independent of time since injury in the acute injury group, and were not associated with cognitive deficits. Overall, this study demonstrates that acute mild traumatic brain injury is characterized by specific white matter abnormalities, which are compatible with tract-specific cytotoxic oedema. These potential oedematous changes were absent in our subacute mild traumatic brain injury participants, suggesting that they may normalize within 12 days after injury, although subtle abnormalities may persist in the subacute stage. Future longitudinal studies are needed to elucidate individualized recovery after brain injury.
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Affiliation(s)
- Remika Mito
- Florey Institute of Neuroscience and Mental Health , Melbourne, VIC 3084 , Australia
| | - Donna M Parker
- Florey Institute of Neuroscience and Mental Health , Melbourne, VIC 3084 , Australia
| | - David F Abbott
- Florey Institute of Neuroscience and Mental Health , Melbourne, VIC 3084 , Australia
- Florey Department of Neuroscience and Mental Health, University of Melbourne , Melbourne, VIC 3052 , Australia
| | - Michael Makdissi
- Florey Institute of Neuroscience and Mental Health , Melbourne, VIC 3084 , Australia
- Olympic Park Sports Medicine Centre , Melbourne, VIC 3004 , Australia
| | - Mangor Pedersen
- Florey Department of Neuroscience and Mental Health, University of Melbourne , Melbourne, VIC 3052 , Australia
- Department of Psychology and Neuroscience, Auckland University of Technology (AUT) , Auckland 1010 , New Zealand
| | - Graeme D Jackson
- Florey Institute of Neuroscience and Mental Health , Melbourne, VIC 3084 , Australia
- Florey Department of Neuroscience and Mental Health, University of Melbourne , Melbourne, VIC 3052 , Australia
- Department of Neurology, Austin Health , Melbourne, VIC 3084 , Australia
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10
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Comparative study of brain damage and oxidative stress using two animal models of the shaken baby syndrome. Exp Gerontol 2022; 166:111874. [PMID: 35779807 DOI: 10.1016/j.exger.2022.111874] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Revised: 05/26/2022] [Accepted: 06/21/2022] [Indexed: 11/21/2022]
Abstract
The objective was compare the morphological damages in brain and to evaluate the participation of oxidative stress, using two animal models of shaken baby syndrome (SBS). Five-day-old Wistar rats were used to develop two models of SBS as follows: Gyrotwister (GT) group was subjected to low intensity, high duration rotating movements and Ratshaker (RS) group made to undergo high intensity, low duration anteroposterior movements. Both groups presented respiratory distress, weight loss and shorter stature compared with the control group. In addition, involuntary movements occurred in both experimental models. Hemorrhage was observed in 10 % of the GT group and in 40 % of the RS group. This last group experienced lesser weight gain at 30 days. Glutathione decreased by 25.7 % (GT) and 59.96 (RT). Cell data analysis revealed the presence of crenate and pyknotic cells, characterized by apparent absence of nucleus and nucleolus as well as vacuolation in the GT group. In the RS group, there were a high number of angular, pyknotic and shrunken cells, and a lot of vacuolization. The severity of the brain damage can be related to the magnitude of biochemical modifications, specifically, those related to the production of reactive oxygen or nitrogen species, oxidative stress, oxidative damage.
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Axonal injury is detected by βAPP immunohistochemistry in rapid death from head injury following road traffic collision. Int J Legal Med 2022; 136:1321-1339. [PMID: 35488928 PMCID: PMC9375765 DOI: 10.1007/s00414-022-02807-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Accepted: 02/21/2022] [Indexed: 11/23/2022]
Abstract
The accumulation of βAPP caused by axonal injury is an active energy-dependent process thought to require blood circulation; therefore, it is closely related to the post-injury survival time. Currently, the earliest reported time at which axonal injury can be detected in post-mortem traumatic brain injury (TBI) tissue by βAPP (Beta Amyloid Precursor Protein) immunohistochemistry is 35 min. The aim of this study is to investigate whether βAPP staining for axonal injury can be detected in patients who died rapidly after TBI in road traffic collision (RTC), in a period of less than 30 min. We retrospectively studied thirty-seven patients (group 1) died very rapidly at the scene; evidenced by forensic assessment of injuries short survival, four patients died after a survival period of between 31 min and 12 h (group 2) and eight patients between 2 and 31 days (group 3). The brains were comprehensively examined and sampled at the time of the autopsy, and βAPP immunohistochemistry carried out on sections from a number of brain areas. βAPP immunoreactivity was demonstrated in 35/37 brains in group 1, albeit with a low frequency and in a variable pattern, and with more intensity and frequency in all brains of group 2 and 7/8 brains from group 3, compared with no similar βAPP immunoreactivity in the control group. The results suggest axonal injury can be detected in those who died rapidly after RTC in a period of less than 30 min, which can help in the diagnosis of severe TBI with short survival time.
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王 鹏, 罗 生, 申 晨, 喻 哲, 聂 祖, 李 志, 文 婕, 李 萌, 曹 霞. [Protective effect of Epothilone D against traumatic optic nerve injury in rats]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2022; 42:575-583. [PMID: 35527494 PMCID: PMC9085595 DOI: 10.12122/j.issn.1673-4254.2022.04.14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Indexed: 11/24/2022]
Abstract
OBJECTIVE To investigate the therapeutic effect of Epothilone D on traumatic optic neuropathy (TON) in rats. METHODS Forty-two SD rats were randomized to receive intraperitoneal injection of 1.0 mg/kg Epothilone D or DMSO (control) every 3 days until day 28, and rat models of TON were established on the second day after the first administration. On days 3, 7, and 28, examination of flash visual evoked potentials (FVEP), immunofluorescence staining and Western blotting were performed to examine the visual pathway features, number of retinal ganglion cells (RGCs), GAP43 expression level in damaged axons, and changes of Tau and pTau-396/404 in the retina and optic nerve. RESULTS In Epothilone D treatment group, RGC loss rate was significantly decreased by 19.12% (P=0.032) on day 3 and by 22.67% (P=0.042) on day 28 as compared with the rats in the control group, but FVEP examination failed to show physiological improvement in the visual pathway on day 28 in terms of the relative latency of N2 wave (P=0.236) and relative amplitude attenuation of P2-N2 wave (P=0.441). The total Tau content in the retina of the treatment group was significantly increased compared with that in the control group on day 3 (P < 0.001), showing a consistent change with ptau-396/404 level. In the optic nerve axons, the total Tau level in the treatment group was significantly lower than that in the control group on day 7 (P=0.002), but the changes of the total Tau and pTau-396/404 level did not show an obvious correlation. Epothilone D induced persistent expression of GAP43 in the damaged axons, detectable even on day 28 of the experiment. CONCLUSION Epothilone D treatment can protect against TON in rats by promoting the survival of injured RGCs, enhancing Tau content in the surviving RGCs, reducing Tau accumulation in injured axons, and stimulating sustained regeneration of axons.
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Affiliation(s)
- 鹏飞 王
- />昆明医科大学第二附属医院,云南 昆明 650101Second Affiliated Hospital of Kunming Medical University, Kunming 650101, China
| | - 生平 罗
- />昆明医科大学第二附属医院,云南 昆明 650101Second Affiliated Hospital of Kunming Medical University, Kunming 650101, China
| | - 晨 申
- />昆明医科大学第二附属医院,云南 昆明 650101Second Affiliated Hospital of Kunming Medical University, Kunming 650101, China
| | - 哲昊 喻
- />昆明医科大学第二附属医院,云南 昆明 650101Second Affiliated Hospital of Kunming Medical University, Kunming 650101, China
| | - 祖庆 聂
- />昆明医科大学第二附属医院,云南 昆明 650101Second Affiliated Hospital of Kunming Medical University, Kunming 650101, China
| | - 志伟 李
- />昆明医科大学第二附属医院,云南 昆明 650101Second Affiliated Hospital of Kunming Medical University, Kunming 650101, China
| | - 婕 文
- />昆明医科大学第二附属医院,云南 昆明 650101Second Affiliated Hospital of Kunming Medical University, Kunming 650101, China
| | - 萌 李
- />昆明医科大学第二附属医院,云南 昆明 650101Second Affiliated Hospital of Kunming Medical University, Kunming 650101, China
| | - 霞 曹
- />昆明医科大学第二附属医院,云南 昆明 650101Second Affiliated Hospital of Kunming Medical University, Kunming 650101, China
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13
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Lin JC, Mueller C, Campbell KA, Thannickal HH, Daredia AF, Sheriff S, Maudsley AA, Brunner RC, Younger JW. Investigating whole-brain metabolite abnormalities in the chronic stages of moderate or severe traumatic brain injury. PM R 2022; 14:472-485. [PMID: 33930238 PMCID: PMC9212770 DOI: 10.1002/pmrj.12623] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 04/18/2021] [Accepted: 04/19/2021] [Indexed: 12/30/2022]
Abstract
BACKGROUND Evidence suggests that neurometabolic abnormalities can persist after traumatic brain injury (TBI) and drive clinical symptoms such as fatigue and cognitive disruption. Magnetic resonance spectroscopy has been used to investigate metabolite abnormalities following TBI, but few studies have obtained data beyond the subacute stage or over large brain regions. OBJECTIVE To measure whole-brain metabolites in chronic stages of TBI. DESIGN Observational study. SETTING University. PARTICIPANTS Eleven men with a moderate or severe TBI more than 12 months prior and 10 age-matched healthy controls completed whole-brain spectroscopic imaging. MAIN MEASURES Ratios of N-acetylaspartate (NAA), choline (CHO), and myo-inositol (MI) to creatine (CR) were measured in whole-brain gray and white matter as well as 64 brain regions of interest. Arterial spin labeling (ASL) data were also collected to investigate whether metabolite abnormalities were accompanied by differences in cerebral perfusion. RESULTS There were no differences in metabolite ratios within whole-brain gray and white matter regions of interest (ROIs). Linear regression showed lower NAA/CR in the white matter of the left occipital lobe but higher NAA/CR in the gray matter of the left parietal lobe. Metabolite abnormalities were observed in several brain regions in the TBI group including the corpus callosum, putamen, and posterior cingulate. However, none of the findings survived correction for multiple comparison. There were no differences in cerebral blood flow between patients and controls. CONCLUSION Higher MI/CR may indicate ongoing gliosis, and it has been suggested that low CHO/CR at chronic time points may indicate cell death or lack of healthy turnover and repair. However, with the small sample size of this study, we caution against the over interpretation of our results. None of the findings within ROIs survived correction for multiple comparison. Thus, they may be considered possible avenues for future research in this area.
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Affiliation(s)
- Joanne C. Lin
- Department of Psychology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Christina Mueller
- Department of Psychology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Kelsey A. Campbell
- Department of Psychology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | | | - Altamish F. Daredia
- Department of Psychology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Sulaiman Sheriff
- Department of Radiology, Miller School of Medicine, University of Miami, Miami, Florida, USA
| | - Andrew A. Maudsley
- Department of Radiology, Miller School of Medicine, University of Miami, Miami, Florida, USA
| | - Robert C. Brunner
- Department of Physical Medicine and Rehabilitation, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Jarred W. Younger
- Department of Psychology, University of Alabama at Birmingham, Birmingham, Alabama, USA
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14
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Macruz FBDC, Feltrin FS, Zaninotto A, Guirado VMDP, Otaduy MCG, Tsunemi MH, Nucci MP, Rimkus C, Andrade CS, Leite CDC. Longitudinal assessment of magnetization transfer ratio, brain volume, and cognitive functions in diffuse axonal injury. Brain Behav 2022; 12:e2490. [PMID: 35103410 PMCID: PMC8933768 DOI: 10.1002/brb3.2490] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 11/08/2021] [Accepted: 12/29/2021] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Diffuse axonal injury (DAI) is a frequent mechanism of traumatic brain injury (TBI) that triggers a sequence of parenchymal changes that progresses from focal axonal shear injuries up to inflammatory response and delayed axonal disconnection. OBJECTIVE The main purpose of this study is to evaluate changes in the axonal/myelinic content and the brain volume up to 12 months after TBI and to correlate these changes with neuropsychological results. METHODS Patients with DAI (n = 25) were scanned at three time points after trauma (2, 6, and 12 months), and the total brain volume (TBV), gray matter volume, and white matter volume (WMV) were calculated in each time point. The magnetization transfer ratio (MTR) for the total brain (TB MTR), gray matter (GM MTR), and white matter (WM MTR) was also quantified. In addition, Hopkins verbal learning test (HVLT), Trail Making Test (TMT), and Rey-Osterrieth Complex Figure test were performed at 6 and 12 months after the trauma. RESULTS There was a significant reduction in the mean TBV, WMV, TB MTR, GM MTR, and WM MTR between time points 1 and 3 (p < .05). There was also a significant difference in HVLT-immediate, TMT-A, and TMT-B scores between time points 2 and 3. The MTR decline correlated more with the cognitive dysfunction than the volume reduction. CONCLUSION A progressive axonal/myelinic rarefaction and volume loss were characterized, especially in the white matter (WM) up to 1 year after the trauma. Despite that, specific neuropsychological tests revealed that patients' episodic verbal memory, attention, and executive function improved during the study. The current findings may be valuable in developing long-term TBI rehabilitation management programs.
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Affiliation(s)
| | - Fabrício Stewan Feltrin
- Department of Radiology and Oncology, Hospital das Clínicas, Faculdade de Medicina da USP, São Paulo, Brazil
| | - Ana Zaninotto
- Neuropsychology Division, Department of Neurology, Hospital das Clínicas, Faculdade de Medicina da USP, São Paulo, Brazil
| | | | | | - Miriam Harumi Tsunemi
- Department of Biostatistics, Universidade Estadual Paulista, Botucatu, São Paulo, Brazil
| | - Mariana Penteado Nucci
- Department of Radiology and Oncology, Hospital das Clínicas, Faculdade de Medicina da USP, São Paulo, Brazil
| | - Carolina Rimkus
- Department of Radiology and Oncology, Hospital das Clínicas, Faculdade de Medicina da USP, São Paulo, Brazil
| | - Celi Santos Andrade
- Department of Radiology and Oncology, Hospital das Clínicas, Faculdade de Medicina da USP, São Paulo, Brazil
| | - Claudia da Costa Leite
- Department of Radiology and Oncology, Hospital das Clínicas, Faculdade de Medicina da USP, São Paulo, Brazil
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15
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Remyelination in PNS and CNS: current and upcoming cellular and molecular strategies to treat disabling neuropathies. Mol Biol Rep 2021; 48:8097-8110. [PMID: 34731366 DOI: 10.1007/s11033-021-06755-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Accepted: 09/15/2021] [Indexed: 10/19/2022]
Abstract
Myelin is a lipid-rich nerve cover that consists of glial cell's plasmalemma layers and accelerates signal conduction. Axon-myelin contact is a source for many developmental and regenerative signals of myelination. Intra- or extracellular factors including both enhancers and inhibitors are other factors affecting the myelination process. Myelin damages are observed in several congenital and hereditary diseases, physicochemical conditions, infections, or traumatic insults, and remyelination is known as an intrinsic response to injuries. Here we discuss some molecular events and conditions involved in de- and remyelination and compare the phenomena of remyelination in CNS and PNS. We have explained applying some of these molecular events in myelin restoration. Finally, the current and upcoming treatment strategies for myelin restoration are explained in three groups of immunotherapy, endogenous regeneration enhancement, and cell therapy to give a better insight for finding the more effective rehabilitation strategies considering the underlying molecular events of a lesion formation and its current condition.
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16
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Gajdošík M, Landheer K, Swanberg KM, Adlparvar F, Madelin G, Bogner W, Juchem C, Kirov II. Hippocampal single-voxel MR spectroscopy with a long echo time at 3 T using semi-LASER sequence. NMR IN BIOMEDICINE 2021; 34:e4538. [PMID: 33956374 PMCID: PMC10874619 DOI: 10.1002/nbm.4538] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 04/01/2021] [Accepted: 04/19/2021] [Indexed: 06/12/2023]
Abstract
The hippocampus is one of the most challenging brain regions for proton MR spectroscopy (MRS) applications. Moreover, quantification of J-coupled species such as myo-inositol (m-Ins) and glutamate + glutamine (Glx) is affected by the presence of macromolecular background. While long echo time (TE) MRS eliminates the macromolecules, it also decreases the m-Ins and Glx signal and, as a result, these metabolites are studied mainly with short TE. Here, we investigate the feasibility of reproducibly measuring their concentrations at a long TE of 120 ms, using a semi-adiabatic localization by adiabatic selective refocusing (sLASER) sequence, as this sequence was recently recommended as a standard for clinical MRS. Gradient offset-independent adiabatic refocusing pulses were implemented, and an optimal long TE for the detection of m-Ins and Glx was determined using the T2 relaxation times of macromolecules. Metabolite concentrations and their coefficients of variation (CVs) were obtained for a 3.4-mL voxel centered on the left hippocampus on 3-T MR systems at two different sites with three healthy subjects (aged 32.5 ± 10.2 years [mean ± standard deviation]) per site, with each subject scanned over two sessions, and with each session comprising three scans. Concentrations of m-Ins, choline, creatine, Glx and N-acetyl-aspartate were 5.4 ± 1.5, 1.7 ± 0.2, 5.8 ± 0.3, 11.6 ± 1.2 and 5.9 ± 0.4 mM (mean ± standard deviation), respectively. Their respective mean within-session CVs were 14.5% ± 5.9%, 6.5% ± 5.3%, 6.0% ± 3.4%, 10.6% ± 6.2% and 3.5% ± 1.4%, and their mean within-subject CVs were 17.8% ± 18.2%, 7.5% ± 6.3%, 7.4% ± 6.4%, 12.4% ± 5.3% and 4.8% ± 3.0%. The between-subject CVs were 25.0%, 12.3%, 5.3%, 10.7% and 6.4%, respectively. Hippocampal long-TE sLASER single voxel spectroscopy can provide macromolecule-independent assessment of all major metabolites including Glx and m-Ins.
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Affiliation(s)
- Martin Gajdošík
- Center for Advanced Imaging Innovation and Research (CAIR), Bernard and Irene Schwartz Center for Biomedical Imaging, Department of Radiology, New York University Grossman School of Medicine, New York, NY, United States
- Department of Biomedical Engineering, Columbia University Fu Foundation School of Engineering and Applied Science, New York, NY, United States
| | - Karl Landheer
- Department of Biomedical Engineering, Columbia University Fu Foundation School of Engineering and Applied Science, New York, NY, United States
| | - Kelley M. Swanberg
- Department of Biomedical Engineering, Columbia University Fu Foundation School of Engineering and Applied Science, New York, NY, United States
| | - Fatemeh Adlparvar
- Center for Advanced Imaging Innovation and Research (CAIR), Bernard and Irene Schwartz Center for Biomedical Imaging, Department of Radiology, New York University Grossman School of Medicine, New York, NY, United States
| | - Guillaume Madelin
- Center for Advanced Imaging Innovation and Research (CAIR), Bernard and Irene Schwartz Center for Biomedical Imaging, Department of Radiology, New York University Grossman School of Medicine, New York, NY, United States
| | - Wolfgang Bogner
- High-Field MR Center, Department of Biomedical Imaging and Image-Guided Therapy, Medical University of Vienna, Vienna, Austria
| | - Christoph Juchem
- Department of Biomedical Engineering, Columbia University Fu Foundation School of Engineering and Applied Science, New York, NY, United States
- Department of Radiology, Columbia University College of Physicians and Surgeons, New York, NY, United States
| | - Ivan I. Kirov
- Center for Advanced Imaging Innovation and Research (CAIR), Bernard and Irene Schwartz Center for Biomedical Imaging, Department of Radiology, New York University Grossman School of Medicine, New York, NY, United States
- Department of Neurology, New York University Grossman School of Medicine, New York, NY, United States
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17
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Zhang W, Hong J, Zheng W, Liu A, Yang Y. High glucose exacerbates neuroinflammation and apoptosis at the intermediate stage after post-traumatic brain injury. Aging (Albany NY) 2021; 13:16088-16104. [PMID: 34176788 PMCID: PMC8266309 DOI: 10.18632/aging.203136] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Accepted: 05/19/2021] [Indexed: 12/12/2022]
Abstract
Traumatic brain injury (TBI) is a highly lethal event with a poor prognosis. Recovering residual neuronal function in the intermediate stage of TBI is important for treatment; however, neuroinflammation and neuronal apoptosis impede residual neuronal repair processes. Considering that hyperglycemia influences inflammatory processes and neuronal survival, we examined the effects of high glucose on neuroinflammation and neuronal death during the intermediate phase of TBI. Rat models of type 2 diabetes mellitus and/or TBI were developed and behaviorally assessed. Neurological function and cognitive abilities were impaired in TBI rats and worsened by type 2 diabetes mellitus. Histopathological staining and analyses of serum and hippocampal mRNA and protein levels indicated that neuroinflammation and apoptosis were induced in TBI rats and exacerbated by hyperglycemia. Hyperglycemia inhibited hippocampal mitogen-activated protein kinase kinase 5 (MEK5) phosphorylation in TBI rats. In vitro assays were used to assess inflammatory factor expression, apoptotic protein levels and neuronal survival after MEK5 activation in TBI- and/or high-glucose-treated neurons. MEK5/extracellular signal-regulated kinase 5 (ERK5) pathway activation reduced the inflammation, cleaved caspase-3 expression, Bax/Bcl-2 ratio and apoptosis of TBI neurons, even under high-glucose conditions. Thus, high glucose exacerbated neuroinflammation and apoptosis in the intermediate stage post-TBI by inhibiting the MEK5/ERK5 pathway.
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Affiliation(s)
- Wenqian Zhang
- Department of Neurosurgery, Tangshan Gongren Hospital, Tangshan, Hebei 063000, China
- Hebei Institute of Head Trauma, Tangshan Gongren Hospital, Tangshan, Hebei 063000, China
| | - Jun Hong
- Department of Neurosurgery, Tangshan Gongren Hospital, Tangshan, Hebei 063000, China
- Hebei Institute of Head Trauma, Tangshan Gongren Hospital, Tangshan, Hebei 063000, China
| | - Wencheng Zheng
- Department of Cardiology, Tangshan Gongren Hospital, Tangshan, Hebei 063000, China
| | - Aijun Liu
- Department of Neurosurgery, Tangshan Gongren Hospital, Tangshan, Hebei 063000, China
- Hebei Institute of Head Trauma, Tangshan Gongren Hospital, Tangshan, Hebei 063000, China
| | - Ying Yang
- Department of Endocrinology, Tangshan Gongren Hospital, Tangshan, Hebei 063000, China
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18
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Bonilla C, Zurita M. Cell-Based Therapies for Traumatic Brain Injury: Therapeutic Treatments and Clinical Trials. Biomedicines 2021; 9:biomedicines9060669. [PMID: 34200905 PMCID: PMC8230536 DOI: 10.3390/biomedicines9060669] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 06/09/2021] [Accepted: 06/09/2021] [Indexed: 02/07/2023] Open
Abstract
Traumatic brain injury (TBI) represents physical damage to the brain tissue that induces transitory or permanent neurological disabilities. TBI contributes to 50% of all trauma deaths, with many enduring long-term consequences and significant medical and rehabilitation costs. There is currently no therapy to reverse the effects associated with TBI. An increasing amount of research has been undertaken regarding the use of different stem cells (SCs) to treat the consequences of brain damage. Neural stem cells (NSCs) (adult and embryonic) and mesenchymal stromal cells (MSCs) have shown efficacy in pre-clinical models of TBI and in their introduction to clinical research. The purpose of this review is to provide an overview of TBI and the state of clinical trials aimed at evaluating the use of stem cell-based therapies in TBI. The primary aim of these studies is to investigate the safety and efficacy of the use of SCs to treat this disease. Although an increasing number of studies are being carried out, few results are currently available. In addition, we present our research regarding the use of cell therapy in TBI. There is still a significant lack of understanding regarding the cell therapy mechanisms for the treatment of TBI. Thus, future studies are needed to evaluate the feasibility of the transplantation of SCs in TBI.
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Affiliation(s)
- Celia Bonilla
- Cell Therapy Unit, Puerta de Hierro Hospital, 28222 Majadahonda, Madrid, Spain
- Correspondence: ; Tel.: +34-91-191-7879
| | - Mercedes Zurita
- Cell Therapy Unit Responsable, Puerta de Hierro Hospital, 28222 Majadahonda, Madrid, Spain;
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Champagne AA, Coverdale NS, Ross A, Murray C, Vallee I, Cook DJ. Characterizing changes in network connectivity following chronic head trauma in special forces military personnel: a combined resting-fMRI and DTI study. Brain Inj 2021; 35:760-768. [PMID: 33792439 DOI: 10.1080/02699052.2021.1906951] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
BACKGROUND Soldiers are exposed to significant repetitive head trauma, which may disrupt functional and structural brain connectivity patterns. PURPOSE/HYPOTHESIS Integrate resting-state functional MRI (rs-fMRI) and diffusion tensor imaging (DTI) to characterize changes in connectivity biomarkers within Canadian Special Operations Forces (CANSOF), hypothesizing that alterations in architectural organization of cortical hubs may follow chronic repetitive head trauma. METHODS Fifteen CANSOFs with a history of chronic exposure to sub-concussive head trauma and concussive injuries (1.9 ± 2.0 concussions (range: [0-6])), as well as an equal age-matched cohort of controls (CTLs) were recruited. BOLD-based rs-fMRI was combined with DTI to reconstruct functional and structural networks using independent component analyses and probabilistic tractography. Connectivity markers were computed based on the distance between functional seeds to assess for possible differences in injury susceptibility of short- and long-range connections. RESULTS/DISCUSSION Significant hyper- and hypo-connectivity differences in cortical connections were observed suggesting that chronic head trauma may predispose soldiers to changes in the functional organization of brain networks. Significant structural alterations in axonal fibers directly connecting disrupted functional nodes were specific to hyper-connected long-range connections, suggesting a potential relationship between axonal injury and increases in neural recruitment following repetitive head trauma from high-exposure military duties.
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Affiliation(s)
- Allen A Champagne
- Centre for Neuroscience Studies, Queen's University, Kingston, ON, Canada.,School of Medicine, Queen's University, Kingston, ON, Canada
| | - Nicole S Coverdale
- Centre for Neuroscience Studies, Queen's University, Kingston, ON, Canada
| | | | | | - Isabelle Vallee
- Canadian Special Operations Forces Command, Ottawa, ON, Canada
| | - Douglas J Cook
- Centre for Neuroscience Studies, Queen's University, Kingston, ON, Canada.,Department of Surgery, Queen's University, Kingston, ON, Canada
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Crampton A, Teel E, Chevignard M, Gagnon I. Vestibular-ocular reflex dysfunction following mild traumatic brain injury: A narrative review. Neurochirurgie 2021; 67:231-237. [PMID: 33482235 DOI: 10.1016/j.neuchi.2021.01.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 01/10/2021] [Indexed: 12/28/2022]
Abstract
Mild traumatic brain injury (mTBI) is a prevalent injury which occurs across many populations, including children and adolescents, athletes, military personnel, and the elderly. mTBI can result in various subjective symptoms and clinical deficits, such as abnormalities to the vestibulo-ocular reflex (VOR). Over 50% of individuals with mTBI are reported to have VOR abnormalities, which strongly contribute to feelings of dizziness and unsteadiness. Dizziness is a strong predictor for prolonged recovery following mTBI and is additionally linked with mental health difficulties and functional limitations affecting likelihood of return to work. Early diagnosis, and subsequent treatment, of VOR deficits following mTBI may greatly improve recovery outcomes and a patient's quality of life, but a thorough comprehension of the related pathophysiology is necessary to understand the assessments used to diagnose VOR abnormalities. Therefore, the purpose of this article is i) provide readers with an introduction on the VOR physiology to facilitate understanding about mTBI-related abnormalities, and ii) to discuss current assessments that are commonly used to measure VOR function following mTBI. As the VOR and oculomotor (OM) systems are heavily linked and often work in tandem, discussion of the relevant aspects of the OM system is also provided.
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Affiliation(s)
- Adrienne Crampton
- School of Physical and Occupational Therapy, McGill University, Montréal, QC, Canada.
| | - Elizabeth Teel
- School of Physical and Occupational Therapy, McGill University, Montréal, QC, Canada
| | - Mathilde Chevignard
- Rehabilitation Department for Children with Acquired Neurological Injury and Outreach Team for Children and Adolescents with Acquired Brain Injury, Saint Maurice Hospitals, Paris, France; Laboratoire d'Imagerie Biomédicale, Sorbonne Université, INSERM, CNRS, Paris, France; GRC 24 HaMCRe, Handicap Moteur et Cognitif et Réadaptation, Sorbonne Université, Paris, France
| | - Isabelle Gagnon
- School of Physical and Occupational Therapy, McGill University, Montréal, QC, Canada; Montreal Children Hospital, McGill University Health Center, Montreal, QC, Canada
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Clark J, Zhu Z, Chuckowree J, Dickson T, Blizzard C. Efficacy of epothilones in central nervous system trauma treatment: what has age got to do with it? Neural Regen Res 2021; 16:618-620. [PMID: 33063710 PMCID: PMC8067923 DOI: 10.4103/1673-5374.295312] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Central nervous system injury, specifically traumatic brain and spinal cord injury, can have significant long lasting effects. There are no comprehensive treatments to combat the injury and sequalae of events that occurring following a central nervous system trauma. Herein we discuss the potential for the epothilone family of microtubule stabilizing agents to improve outcomes following experimentally induced trauma. These drugs, which are able to cross the blood-brain barrier, may hold great promise for the treatment of central nervous system trauma and the current literature presents the extensive range of beneficial effects these drugs may have following trauma in animal models. Importantly, the effect of the epothilones can vary and our most recent contributions to this field indicate that the efficacy of epothilones following traumatic brain injury is dependent upon the age of the animals. Therefore, we present a case for a greater emphasis to be placed upon age when using an intervention aimed at neural regeneration and highlight the importance of tailoring the therapeutic regime in the clinic to the age of the patient to promote improved patient outcomes.
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Affiliation(s)
- Jayden Clark
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia
| | - Zhendan Zhu
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia
| | - Jyoti Chuckowree
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia
| | - Tracey Dickson
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia
| | - Catherine Blizzard
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia
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22
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Gabrieli D, Schumm SN, Vigilante NF, Parvesse B, Meaney DF. Neurodegeneration exposes firing rate dependent effects on oscillation dynamics in computational neural networks. PLoS One 2020; 15:e0234749. [PMID: 32966291 PMCID: PMC7510994 DOI: 10.1371/journal.pone.0234749] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 06/01/2020] [Indexed: 12/26/2022] Open
Abstract
Traumatic brain injury (TBI) can lead to neurodegeneration in the injured circuitry, either through primary structural damage to the neuron or secondary effects that disrupt key cellular processes. Moreover, traumatic injuries can preferentially impact subpopulations of neurons, but the functional network effects of these targeted degeneration profiles remain unclear. Although isolating the consequences of complex injury dynamics and long-term recovery of the circuit can be difficult to control experimentally, computational networks can be a powerful tool to analyze the consequences of injury. Here, we use the Izhikevich spiking neuron model to create networks representative of cortical tissue. After an initial settling period with spike-timing-dependent plasticity (STDP), networks developed rhythmic oscillations similar to those seen in vivo. As neurons were sequentially removed from the network, population activity rate and oscillation dynamics were significantly reduced. In a successive period of network restructuring with STDP, network activity levels returned to baseline for some injury levels and oscillation dynamics significantly improved. We next explored the role that specific neurons have in the creation and termination of oscillation dynamics. We determined that oscillations initiate from activation of low firing rate neurons with limited structural inputs. To terminate oscillations, high activity excitatory neurons with strong input connectivity activate downstream inhibitory circuitry. Finally, we confirm the excitatory neuron population role through targeted neurodegeneration. These results suggest targeted neurodegeneration can play a key role in the oscillation dynamics after injury.
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Affiliation(s)
- David Gabrieli
- Department of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Samantha N. Schumm
- Department of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Nicholas F. Vigilante
- Department of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Brandon Parvesse
- Department of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - David F. Meaney
- Department of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
- Department of Neurosurgery, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
- * E-mail:
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23
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Krishna G, Bromberg C, Connell EC, Mian E, Hu C, Lifshitz J, Adelson PD, Thomas TC. Traumatic Brain Injury-Induced Sex-Dependent Changes in Late-Onset Sensory Hypersensitivity and Glutamate Neurotransmission. Front Neurol 2020; 11:749. [PMID: 32849211 PMCID: PMC7419702 DOI: 10.3389/fneur.2020.00749] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Accepted: 06/17/2020] [Indexed: 01/15/2023] Open
Abstract
Women approximate one-third of the annual 2.8 million people in the United States who sustain traumatic brain injury (TBI). Several clinical reports support or refute that menstrual cycle-dependent fluctuations in sex hormones are associated with severity of persisting post-TBI symptoms. Previously, we reported late-onset sensory hypersensitivity to whisker stimulation that corresponded with changes in glutamate neurotransmission at 1-month following diffuse TBI in male rats. Here, we incorporated intact age-matched naturally cycling females into the experimental design while monitoring daily estrous cycle. We hypothesized that sex would not influence late-onset sensory hypersensitivity and associated in vivo amperometric extracellular recordings of glutamate neurotransmission within the behaviorally relevant thalamocortical circuit. At 28 days following midline fluid percussion injury (FPI) or sham surgery, young adult Sprague-Dawley rats were tested for hypersensitivity to whisker stimulation using the whisker nuisance task (WNT). As predicted, both male and female rats showed significantly increased sensory hypersensitivity to whisker stimulation after FPI, with females having an overall decrease in whisker nuisance scores (sex effect), but no injury and sex interaction. In males, FPI increased potassium chloride (KCl)-evoked glutamate overflow in primary somatosensory barrel cortex (S1BF) and ventral posteromedial nucleus of the thalamus (VPM), while in females the FPI effect was discernible only within the VPM. Similar to our previous report, we found the glutamate clearance parameters were not influenced by FPI, while a sex-specific effect was evident with female rats showing a lower uptake rate constant both in S1BF and VPM and longer clearance time (in S1BF) in comparison to male rats. Fluctuations in estrous cycle were evident among brain-injured females with longer diestrus (low circulating hormone) phase of the cycle over 28 days post-TBI. Together, these findings add to growing evidence indicating both similarities and differences between sexes in a chronic response to TBI. A better understanding of the influence of gonadal hormones on behavior, neurotransmission, secondary injury and repair processes after TBI is needed both clinically and translationally, with potential impact on acute treatment, rehabilitation, and symptom management.
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Affiliation(s)
- Gokul Krishna
- Department of Child Health, University of Arizona College of Medicine – Phoenix, Phoenix, AZ, United States
- Barrow Neurological Institute at Phoenix Children's Hospital, Phoenix, AZ, United States
| | - Caitlin Bromberg
- Department of Child Health, University of Arizona College of Medicine – Phoenix, Phoenix, AZ, United States
- Barrow Neurological Institute at Phoenix Children's Hospital, Phoenix, AZ, United States
| | - Emily Charlotte Connell
- Department of Child Health, University of Arizona College of Medicine – Phoenix, Phoenix, AZ, United States
- Barrow Neurological Institute at Phoenix Children's Hospital, Phoenix, AZ, United States
- Department of Biology and Biochemistry, University of Bath, Bath, United Kingdom
| | - Erum Mian
- Department of Child Health, University of Arizona College of Medicine – Phoenix, Phoenix, AZ, United States
- Barrow Neurological Institute at Phoenix Children's Hospital, Phoenix, AZ, United States
| | - Chengcheng Hu
- Department of Epidemiology and Biostatistics, University of Arizona, Tucson, AZ, United States
| | - Jonathan Lifshitz
- Department of Child Health, University of Arizona College of Medicine – Phoenix, Phoenix, AZ, United States
- Barrow Neurological Institute at Phoenix Children's Hospital, Phoenix, AZ, United States
- Phoenix VA Health Care System, Phoenix, AZ, United States
| | - P. David Adelson
- Department of Child Health, University of Arizona College of Medicine – Phoenix, Phoenix, AZ, United States
- Barrow Neurological Institute at Phoenix Children's Hospital, Phoenix, AZ, United States
| | - Theresa Currier Thomas
- Department of Child Health, University of Arizona College of Medicine – Phoenix, Phoenix, AZ, United States
- Barrow Neurological Institute at Phoenix Children's Hospital, Phoenix, AZ, United States
- Phoenix VA Health Care System, Phoenix, AZ, United States
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24
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Prado GR, LaPlaca MC. Neuronal Plasma Membrane Integrity is Transiently Disturbed by Traumatic Loading. Neurosci Insights 2020; 15:2633105520946090. [PMID: 32783028 PMCID: PMC7385830 DOI: 10.1177/2633105520946090] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Accepted: 07/09/2020] [Indexed: 01/27/2023] Open
Abstract
The acute response of neurons subjected to traumatic loading involves plasma membrane disruption, yet the mechanical tolerance for membrane compromise, time course, and mechanisms for resealing are not well understood. We have used an in vitro traumatic neuronal injury model to investigate plasma membrane integrity immediately following a high-rate shear injury. Cell-impermeant fluorescent molecules were added to cortical neuronal cultures prior to insult to assess membrane integrity. The percentage of cells containing the permeability marker was dependent on the molecular size of the marker, as smaller molecules gained access to a higher percentage of cells than larger ones. Permeability increases were positively correlated with insult loading rate. Membrane disruption was transient, evidenced by a membrane resealing within the first minute after the insult. In addition, chelation of either extracellular Ca2+ or intracellular Ca2+ limited membrane resealing. However, injury following chelation of both extracellular and intracellular Ca2+ caused diminished permeability as well as a greater resealing ability compared to chelation of extracellular or intracellular Ca2+ alone. Treatment of neuronal cultures with jasplakinolide, which stabilizes filamentous actin, reduced permeability increases, while latrunculin-B, an actin depolymerizing agent, both reduced the increase in plasma membrane permeability and promoted resealing. This study gives insight into the dynamics of neuronal membrane disruption and subsequent resealing, which was found to be calcium dependent and involve actin in a role that differs from non-neuronal cells. Taken together, these data will lead to a better understanding of the acute neuronal response to traumatic loading.
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Affiliation(s)
- Gustavo R Prado
- Translational Neurotrauma Laboratory, Wallace H. Coulter Department of Biomedical Engineering at Georgia Institute of Technology & Emory University School of Medicine, Atlanta, GA, USA
| | - Michelle C LaPlaca
- Translational Neurotrauma Laboratory, Wallace H. Coulter Department of Biomedical Engineering at Georgia Institute of Technology & Emory University School of Medicine, Atlanta, GA, USA
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25
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Abstract
PURPOSE OF REVIEW Diffuse or traumatic axonal injury is one of the principal pathologies encountered in traumatic brain injury (TBI) and the resulting axonal loss, disconnection, and brain atrophy contribute significantly to clinical morbidity and disability. The seminal discovery of the slow Wallerian degeneration mice (Wld) in which transected axons do not degenerate but survive and function independently for weeks has transformed concepts on axonal biology and raised hopes that axonopathies may be amenable to specific therapeutic interventions. Here we review mechanisms of axonal degeneration and also describe how these mechanisms may inform biological therapies of traumatic axonopathy in the context of TBI. RECENT FINDINGS In the last decade, SARM1 [sterile a and Toll/interleukin-1 receptor (TIR) motif containing 1] and the DLK (dual leucine zipper bearing kinase) and LZK (leucine zipper kinase) MAPK (mitogen-activated protein kinases) cascade have been established as the key drivers of Wallerian degeneration, a complex program of axonal self-destruction which is activated by a wide range of injurious insults, including insults that may otherwise leave axons structurally robust and potentially salvageable. Detailed studies on animal models and postmortem human brains indicate that this type of partial disruption is the main initial pathology in traumatic axonopathy. At the same time, the molecular dissection of Wallerian degeneration has revealed that the decision that commits axons to degeneration is temporally separated from the time of injury, a window that allows potentially effective pharmacological interventions. SUMMARY Molecular signals initiating and triggering Wallerian degeneration appear to be playing an important role in traumatic axonopathy and recent advances in understanding their nature and significance is opening up new therapeutic opportunities for TBI.
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26
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Schepici G, Silvestro S, Bramanti P, Mazzon E. Traumatic Brain Injury and Stem Cells: An Overview of Clinical Trials, the Current Treatments and Future Therapeutic Approaches. ACTA ACUST UNITED AC 2020; 56:medicina56030137. [PMID: 32204311 PMCID: PMC7143935 DOI: 10.3390/medicina56030137] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 03/04/2020] [Accepted: 03/15/2020] [Indexed: 02/07/2023]
Abstract
Traumatic brain injury represents physical damage to the brain tissue that induces transitory or permanent neurological disabilities. The traumatic injury activates an important inflammatory response, followed by a cascade of events that lead to neuronal loss and further brain damage. Maintaining proper ventilation, a normal level of oxygenation, and adequate blood pressure are the main therapeutic strategies performed after injury. Surgery is often necessary for patients with more serious injuries. However, to date, there are no therapies that completely resolve the brain damage suffered following the trauma. Stem cells, due to their capacity to differentiate into neuronal cells and through releasing neurotrophic factors, seem to be a valid strategy to use in the treatment of traumatic brain injury. The purpose of this review is to provide an overview of clinical trials, aimed to evaluate the use of stem cell-based therapy in traumatic brain injury. These studies aim to assess the safety and efficacy of stem cells in this disease. The results available so far are few; therefore, future studies need in order to evaluate the safety and efficacy of stem cell transplantation in traumatic brain injury.
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27
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Krishna G, Beitchman JA, Bromberg CE, Currier Thomas T. Approaches to Monitor Circuit Disruption after Traumatic Brain Injury: Frontiers in Preclinical Research. Int J Mol Sci 2020; 21:ijms21020588. [PMID: 31963314 PMCID: PMC7014469 DOI: 10.3390/ijms21020588] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 01/03/2020] [Accepted: 01/13/2020] [Indexed: 12/19/2022] Open
Abstract
Mild traumatic brain injury (TBI) often results in pathophysiological damage that can manifest as both acute and chronic neurological deficits. In an attempt to repair and reconnect disrupted circuits to compensate for loss of afferent and efferent connections, maladaptive circuitry is created and contributes to neurological deficits, including post-concussive symptoms. The TBI-induced pathology physically and metabolically changes the structure and function of neurons associated with behaviorally relevant circuit function. Complex neurological processing is governed, in part, by circuitry mediated by primary and modulatory neurotransmitter systems, where signaling is disrupted acutely and chronically after injury, and therefore serves as a primary target for treatment. Monitoring of neurotransmitter signaling in experimental models with technology empowered with improved temporal and spatial resolution is capable of recording in vivo extracellular neurotransmitter signaling in behaviorally relevant circuits. Here, we review preclinical evidence in TBI literature that implicates the role of neurotransmitter changes mediating circuit function that contributes to neurological deficits in the post-acute and chronic phases and methods developed for in vivo neurochemical monitoring. Coupling TBI models demonstrating chronic behavioral deficits with in vivo technologies capable of real-time monitoring of neurotransmitters provides an innovative approach to directly quantify and characterize neurotransmitter signaling as a universal consequence of TBI and the direct influence of pharmacological approaches on both behavior and signaling.
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Affiliation(s)
- Gokul Krishna
- Barrow Neurological Institute at Phoenix Children’s Hospital, Phoenix, AZ 85016, USA; (G.K.); (J.A.B.); (C.E.B.)
- Department of Child Health, University of Arizona College of Medicine-Phoenix, Phoenix, AZ 85004, USA
| | - Joshua A. Beitchman
- Barrow Neurological Institute at Phoenix Children’s Hospital, Phoenix, AZ 85016, USA; (G.K.); (J.A.B.); (C.E.B.)
- Department of Child Health, University of Arizona College of Medicine-Phoenix, Phoenix, AZ 85004, USA
- College of Graduate Studies, Midwestern University, Glendale, AZ 85308, USA
| | - Caitlin E. Bromberg
- Barrow Neurological Institute at Phoenix Children’s Hospital, Phoenix, AZ 85016, USA; (G.K.); (J.A.B.); (C.E.B.)
- Department of Child Health, University of Arizona College of Medicine-Phoenix, Phoenix, AZ 85004, USA
| | - Theresa Currier Thomas
- Barrow Neurological Institute at Phoenix Children’s Hospital, Phoenix, AZ 85016, USA; (G.K.); (J.A.B.); (C.E.B.)
- Department of Child Health, University of Arizona College of Medicine-Phoenix, Phoenix, AZ 85004, USA
- Phoenix VA Healthcare System, Phoenix, AZ 85012, USA
- Correspondence: ; Tel.: +1-602-827-2348
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28
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Naidu PSR, Denham E, Bartlett CA, McGonigle T, Taylor NL, Norret M, Smith NM, Dunlop SA, Iyer KS, Fitzgerald M. Protein corona formation moderates the release kinetics of ion channel antagonists from transferrin-functionalized polymeric nanoparticles. RSC Adv 2020; 10:2856-2869. [PMID: 35496130 PMCID: PMC9048831 DOI: 10.1039/c9ra09523c] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Accepted: 12/25/2019] [Indexed: 11/21/2022] Open
Abstract
Transferrin (Tf)-functionalized p(HEMA-ran-GMA) nanoparticles were designed to incorporate and release a water-soluble combination of three ion channel antagonists, namely zonampanel monohydrate (YM872), oxidized adenosine triphosphate (oxATP) and lomerizine hydrochloride (LOM) identified as a promising therapy for secondary degeneration that follows neurotrauma. Coupled with a mean hydrodynamic size of 285 nm and near-neutral surface charge of −5.98 mV, the hydrophilic nature of the functionalized polymeric nanoparticles was pivotal in effectively encapsulating the highly water soluble YM872 and oxATP, as well as lipophilic LOM dissolved in water-based medium, by a back-filling method. Maximum loading efficiencies of 11.8 ± 1.05% (w/w), 13.9 ± 1.50% (w/w) and 22.7 ± 4.00% (w/w) LOM, YM872 and oxATP respectively were reported. To obtain an estimate of drug exposure in vivo, drug release kinetics assessment by HPLC was conducted in representative physiological milieu containing 55% (v/v) human serum at 37 °C. In comparison to serum-free conditions, it was demonstrated that the inevitable adsorption of serum proteins on the Tf-functionalized nanoparticle surface as a protein corona impeded the rate of release of LOM and YM872 at both pH 5 and 7.4 over a period of 1 hour. While the release of oxATP from the nanoparticles was detectable for up to 30 minutes under serum-free conditions at pH 7.4, the presence of serum proteins and a slightly acidic environment impaired the detection of the drug, possibly due to its molecular instability. Nevertheless, under representative physiological conditions, all three drugs were released in combination from Tf-functionalized p(HEMA-ran-GMA) nanoparticles and detected for up to 20 minutes. Taken together, the study provided enhanced insight into potential physiological outcomes in the presence of serum proteins, and suggests that p(HEMA-ran-GMA)-based therapeutic nanoparticles may be promising drug delivery vehicles for CNS therapy. Transferrin (Tf)-functionalized p(HEMA-ran-GMA) nanoparticles were designed to incorporate and release a water-soluble combination of three ion channel antagonists, identified as a promising therapy for secondary degeneration following neurotrauma.![]()
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Affiliation(s)
- Priya S. R. Naidu
- School of Molecular Sciences
- The University of Western Australia
- Crawley
- Australia
| | - Eleanor Denham
- Curtin Health Innovation Research Institute
- Curtin University
- Bentley
- Australia
| | - Carole A. Bartlett
- Curtin Health Innovation Research Institute
- Curtin University
- Bentley
- Australia
| | - Terry McGonigle
- Curtin Health Innovation Research Institute
- Curtin University
- Bentley
- Australia
| | - Nicolas L. Taylor
- School of Molecular Sciences
- The University of Western Australia
- Crawley
- Australia
- Australian Research Council Centre of Excellence in Plant Energy Biology
| | - Marck Norret
- School of Molecular Sciences
- The University of Western Australia
- Crawley
- Australia
| | - Nicole. M. Smith
- School of Molecular Sciences
- The University of Western Australia
- Crawley
- Australia
| | - Sarah A. Dunlop
- School of Biological Sciences
- The University of Western Australia
- Crawley
- Australia
| | - K. Swaminathan Iyer
- School of Molecular Sciences
- The University of Western Australia
- Crawley
- Australia
| | - Melinda Fitzgerald
- Curtin Health Innovation Research Institute
- Curtin University
- Bentley
- Australia
- School of Biological Sciences
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29
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Horstemeyer MF, Berthelson PR, Moore J, Persons AK, Dobbins A, Prabhu RK. A Mechanical Brain Damage Framework Used to Model Abnormal Brain Tau Protein Accumulations of National Football League Players. Ann Biomed Eng 2019; 47:1873-1888. [PMID: 31372858 PMCID: PMC6757135 DOI: 10.1007/s10439-019-02294-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Accepted: 05/22/2019] [Indexed: 12/14/2022]
Abstract
A mechanics-based brain damage framework is used to model the abnormal accumulation of hyperphosphorylated p-tau associated with chronic traumatic encephalopathy within the brains of deceased National Football League (NFL) players studied at Boston University and to provide a framework for understanding the damage mechanisms. p-tau damage is formulated as the multiplicative decomposition of three independently evolving damage internal state variables (ISVs): nucleation related to number density, growth related to the average area, and coalescence related to the nearest neighbor distance. The ISVs evolve under different rates for three well known mechanical boundary conditions, which in themselves introduce three different rates making a total of nine scenarios, that we postulate are related to brain damage progression: (1) monotonic overloads, (2) cyclic fatigue which corresponds to repetitive impacts, and (3) creep which is correlated to damage accumulation over time. Different NFL player positions are described to capture the different types of damage progression. Skill position players, such as quarterbacks, are expected to exhibit a greater p-tau protein accumulation during low cycle fatigue (higher amplitude impacts with a lesser number), and linemen who exhibit a greater p-tau protein accumulation during high cycle fatigue (lower amplitude impacts with a greater number of impacts). This mechanics-based damage framework presents a foundation for developing a multiscale model for traumatic brain injury that combines mechanics with biology.
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Affiliation(s)
- M F Horstemeyer
- Department of Mechanical Engineering, Mississippi State University, Starkville, MS, 39762, USA. .,Center for Advanced Vehicular Systems, Mississippi State University, Starkville, MS, 39759, USA. .,School of Engineering, Liberty University, 1971 Liberty Avenue, Lynchburg, VA, 24515, USA.
| | - P R Berthelson
- Center for Advanced Vehicular Systems, Mississippi State University, Starkville, MS, 39759, USA.,Department of Agricultural and Biological Engineering, Mississippi State University, 130 Creelman St., Starkville, MS, 39762, USA
| | - J Moore
- Department of Mechanical Engineering, Mississippi State University, Starkville, MS, 39762, USA.,Center for Advanced Vehicular Systems, Mississippi State University, Starkville, MS, 39759, USA
| | - A K Persons
- Department of Mechanical Engineering, Mississippi State University, Starkville, MS, 39762, USA.,Center for Advanced Vehicular Systems, Mississippi State University, Starkville, MS, 39759, USA
| | - A Dobbins
- Department of Biomedical Engineering, University of Alabama at Birmingham, Birmingham, AL, 35294, USA
| | - R K Prabhu
- Center for Advanced Vehicular Systems, Mississippi State University, Starkville, MS, 39759, USA.,Department of Agricultural and Biological Engineering, Mississippi State University, 130 Creelman St., Starkville, MS, 39762, USA
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30
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Bastakis GG, Ktena N, Karagogeos D, Savvaki M. Models and treatments for traumatic optic neuropathy and demyelinating optic neuritis. Dev Neurobiol 2019; 79:819-836. [PMID: 31297983 DOI: 10.1002/dneu.22710] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 07/04/2019] [Accepted: 07/05/2019] [Indexed: 02/06/2023]
Abstract
Pathologies of the optic nerve could result as primary insults in the visual tract or as secondary deficits due to inflammation, demyelination, or compressing effects of the surrounding tissue. The extent of damage may vary from mild to severe, differently affecting patient vision, with the most severe forms leading to complete uni- or bilateral visual loss. The aim of researchers and clinicians in the field is to alleviate the symptoms of these, yet uncurable pathologies, taking advantage of known and novel potential therapeutic approaches, alone or in combinations, and applying them in a limited time window after the insult. In this review, we discuss the epidemiological and clinical profile as well as the pathophysiological mechanisms of two main categories of optic nerve pathologies, namely traumatic optic neuropathy and optic neuritis, focusing on the demyelinating form of the latter. Moreover, we report on the main rodent models mimicking these pathologies or some of their clinical aspects. The current treatment options will also be reviewed and novel approaches will be discussed.
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Affiliation(s)
| | - Niki Ktena
- University of Crete Faculty of Medicine, Heraklion, Greece.,Institute of Molecular Biology and Biotechnology, Heraklion, Greece
| | - Domna Karagogeos
- University of Crete Faculty of Medicine, Heraklion, Greece.,Institute of Molecular Biology and Biotechnology, Heraklion, Greece
| | - Maria Savvaki
- University of Crete Faculty of Medicine, Heraklion, Greece.,Institute of Molecular Biology and Biotechnology, Heraklion, Greece
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31
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McGuire JL, Ngwenya LB, McCullumsmith RE. Neurotransmitter changes after traumatic brain injury: an update for new treatment strategies. Mol Psychiatry 2019; 24:995-1012. [PMID: 30214042 DOI: 10.1038/s41380-018-0239-6] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2017] [Revised: 08/15/2018] [Accepted: 08/20/2018] [Indexed: 12/12/2022]
Abstract
Traumatic brain injury (TBI) is a pervasive problem in the United States and worldwide, as the number of diagnosed individuals is increasing yearly and there are no efficacious therapeutic interventions. A large number of patients suffer with cognitive disabilities and psychiatric conditions after TBI, especially anxiety and depression. The constellation of post-injury cognitive and behavioral symptoms suggest permanent effects of injury on neurotransmission. Guided in part by preclinical studies, clinical trials have focused on high-yield pathophysiologic mechanisms, including protein aggregation, inflammation, metabolic disruption, cell generation, physiology, and alterations in neurotransmitter signaling. Despite successful treatment of experimental TBI in animal models, clinical studies based on these findings have failed to translate to humans. The current international effort to reshape TBI research is focusing on redefining the taxonomy and characterization of TBI. In addition, as the next round of clinical trials is pending, there is a pressing need to consider what the field has learned over the past two decades of research, and how we can best capitalize on this knowledge to inform the hypotheses for future innovations. Thus, it is critically important to extend our understanding of the pathophysiology of TBI, particularly to mechanisms that are associated with recovery versus development of chronic symptoms. In this review, we focus on the pathology of neurotransmission after TBI, reflecting on what has been learned from both the preclinical and clinical studies, and we discuss new directions and opportunities for future work.
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Affiliation(s)
- Jennifer L McGuire
- Department of Neurosurgery, University of Cincinnati, Cincinnati, OH, USA.
| | - Laura B Ngwenya
- Department of Neurosurgery, University of Cincinnati, Cincinnati, OH, USA.,Department of Neurology and Rehabilitation Medicine, University of Cincinnati, Cincinnati, OH, USA.,Neurotrauma Center, University of Cincinnati Gardner Neuroscience Institute, Cincinnati, OH, 45219, USA
| | - Robert E McCullumsmith
- Department of Psychiatry and Behavioral Neuroscience, University of Cincinnati, Cincinnati, OH, USA.,Department of Psychiatry, Cincinnati Veterans Administration Medical Center, Cincinnati, OH, USA
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32
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Holshouser B, Pivonka-Jones J, Nichols JG, Oyoyo U, Tong K, Ghosh N, Ashwal S. Longitudinal Metabolite Changes after Traumatic Brain Injury: A Prospective Pediatric Magnetic Resonance Spectroscopic Imaging Study. J Neurotrauma 2018; 36:1352-1360. [PMID: 30351247 DOI: 10.1089/neu.2018.5919] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
The aims of this study were to evaluate longitudinal metabolite changes in traumatic brain injury (TBI) subjects and determine whether early magnetic resonance spectroscopic imaging (MRSI) changes in discrete brain regions predict 1-year neuropsychological outcomes. Three-dimensional (3D) proton MRSI was performed in pediatric subjects with complicated mild (cMild), moderate, and severe injury, acutely (6-17 days) and 1-year post-injury along with neurological and cognitive testing. Longitudinal analysis found that in the cMild/Moderate group, all MRSI ratios from 12 regions returned to control levels at 1 year. In the severe group, only cortical gray matter regions fully recovered to control levels whereas N-acetylaspartate (NAA) ratios from the hemispheric white matter and subcortical regions remained statistically different from controls. A factor analysis reduced the data to two loading factors that significantly differentiated between TBI groups; one included acute regional NAA variables and another consisted of clinically observed variables (e.g., days in coma). Using scores calculated from the two loading factors in a logistic regression model, we found that the percent accuracy for classification of TBI groups was greatest for the dichotomized attention measure (93%), followed by Full Scale Intelligence Quotient at 91%, and the combined memory Z-score measure (90%). Using the acute basal ganglia NAA/creatine (Cr) ratio alone achieved a higher percent accuracy of 94.7% for the attention measure whereas the acute thalamic NAA/Cr ratio alone achieved a higher percent accuracy of 91.9% for the memory measure. These results support the conclusions that reduced NAA is an early indicator of tissue injury and that measurements from subcortical brain regions are more predictive of long-term cognitive outcome.
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Affiliation(s)
- Barbara Holshouser
- 1 Department of Radiology, Loma Linda University School of Medicine, Loma Linda, California
| | - Jamie Pivonka-Jones
- 2 Department of Pediatrics, Loma Linda University School of Medicine, Loma Linda, California
| | - Joy G Nichols
- 2 Department of Pediatrics, Loma Linda University School of Medicine, Loma Linda, California
| | - Udo Oyoyo
- 1 Department of Radiology, Loma Linda University School of Medicine, Loma Linda, California
| | - Karen Tong
- 1 Department of Radiology, Loma Linda University School of Medicine, Loma Linda, California
| | - Nirmalya Ghosh
- 2 Department of Pediatrics, Loma Linda University School of Medicine, Loma Linda, California
| | - Stephen Ashwal
- 2 Department of Pediatrics, Loma Linda University School of Medicine, Loma Linda, California
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33
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Douglas DB, Ro T, Toffoli T, Krawchuk B, Muldermans J, Gullo J, Dulberger A, Anderson AE, Douglas PK, Wintermark M. Neuroimaging of Traumatic Brain Injury. Med Sci (Basel) 2018; 7:E2. [PMID: 30577545 PMCID: PMC6358760 DOI: 10.3390/medsci7010002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 12/12/2018] [Accepted: 12/14/2018] [Indexed: 12/15/2022] Open
Abstract
The purpose of this article is to review conventional and advanced neuroimaging techniques performed in the setting of traumatic brain injury (TBI). The primary goal for the treatment of patients with suspected TBI is to prevent secondary injury. In the setting of a moderate to severe TBI, the most appropriate initial neuroimaging examination is a noncontrast head computed tomography (CT), which can reveal life-threatening injuries and direct emergent neurosurgical intervention. We will focus much of the article on advanced neuroimaging techniques including perfusion imaging and diffusion tensor imaging and discuss their potentials and challenges. We believe that advanced neuroimaging techniques may improve the accuracy of diagnosis of TBI and improve management of TBI.
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Affiliation(s)
- David B Douglas
- Department of Neuroradiology, Stanford University, Palo Alto, CA 94301, USA.
- Department of Radiology, David Grant Medical Center, Travis AFB, CA 94535, USA.
| | - Tae Ro
- Department of Radiology, David Grant Medical Center, Travis AFB, CA 94535, USA.
| | - Thomas Toffoli
- Department of Radiology, David Grant Medical Center, Travis AFB, CA 94535, USA.
| | - Bennet Krawchuk
- Department of Radiology, David Grant Medical Center, Travis AFB, CA 94535, USA.
| | - Jonathan Muldermans
- Department of Radiology, David Grant Medical Center, Travis AFB, CA 94535, USA.
| | - James Gullo
- Department of Radiology, David Grant Medical Center, Travis AFB, CA 94535, USA.
| | - Adam Dulberger
- Department of Radiology, David Grant Medical Center, Travis AFB, CA 94535, USA.
| | - Ariana E Anderson
- Department of Psychiatry and Biobehavioral Sciences, UCLA, Los Angeles, CA 90095, USA.
| | - Pamela K Douglas
- Department of Psychiatry and Biobehavioral Sciences, UCLA, Los Angeles, CA 90095, USA.
- Institute for Simulation and Training, University of Central Florida, Orlando, FL 32816, USA.
| | - Max Wintermark
- Department of Neuroradiology, Stanford University, Palo Alto, CA 94301, USA.
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Goldman-Yassen AE, Chen KX, Edasery D, Hsu K, Ye K, Lipton ML. Near-Term Decrease in Brain Volume following Mild Traumatic Injury Is Detectible in the Context of Preinjury Volumetric Stability: Neurobiologic Insights from Analysis of Historical Imaging Examinations. AJNR Am J Neuroradiol 2018; 39:1821-1826. [PMID: 30190258 DOI: 10.3174/ajnr.a5769] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 06/29/2018] [Indexed: 12/29/2022]
Abstract
BACKGROUND AND PURPOSE Neurodegeneration after mild traumatic brain injury may manifest as decreasing regional brain volume that evolves from months to years following mild traumatic brain injury and is associated with worse clinical outcomes. We hypothesized that quantitative brain volume derived from CT of the head, performed for clinical indications during routine care, would change with time and provide insights into the putative neuroinflammatory response to mild traumatic brain injury. MATERIALS AND METHODS We searched the electronic medical record of our institution for NCCTs of the head performed in patients with mild traumatic brain injury and included those who also underwent NCCTs of the head 1 month to 1 year before and after mild traumatic brain injury for an indication unrelated to trauma. Controls underwent 3 sequential NCCTs of the head with indications unrelated to trauma. The whole-brain and intracranial volume groups were computed using ITK-SNAP. Brain volumes normalized to intracranial volumes were compared across time points using the Wilcoxon signed-rank test. RESULTS We identified 48 patients from 2005 to 2015 who underwent NCCTs of the head in the emergency department for mild traumatic brain injury and had NCCTs of the head performed both before and after mild traumatic brain injury. Median normalized brain volumes significantly decreased on the follow-up study post-mild traumatic brain injury (0.86 versus 0.84, P < .001) and were similar compared with pre-mild traumatic brain injury studies (0.87 versus 0.86, P = .927). There was no significant difference between normalized brain volumes in the 48 controls. CONCLUSIONS A decrease in brain volume following mild traumatic brain injury is detectable on CT and is not seen in similar patients with non-mild traumatic brain injury during a similar timeframe. Given the stability of brain volume before mild traumatic brain injury, CT volume loss may represent the subtle effects of neurodegeneration.
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Affiliation(s)
- A E Goldman-Yassen
- From the Department of Radiology (A.E.G.-Y., K.X.C., D.E., K.H.), Montefiore Medical Center, Bronx, New York
| | - K X Chen
- From the Department of Radiology (A.E.G.-Y., K.X.C., D.E., K.H.), Montefiore Medical Center, Bronx, New York
| | - D Edasery
- From the Department of Radiology (A.E.G.-Y., K.X.C., D.E., K.H.), Montefiore Medical Center, Bronx, New York
| | - K Hsu
- From the Department of Radiology (A.E.G.-Y., K.X.C., D.E., K.H.), Montefiore Medical Center, Bronx, New York
| | - K Ye
- Department of Epidemiology and Population Health (K.Y.), Albert Einstein College of Medicine, Bronx, New York
| | - M L Lipton
- Gruss Magnetic Resonance Research Center Departments of Radiology, Psychiatry and Behavioral Sciences and Dominick P. Purpura Department of Neuroscience (M.L.L.), Albert Einstein College of Medicine, Bronx, New York.
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35
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Mustafi SM, Harezlak J, Koch KM, Nencka AS, Meier TB, West JD, Giza CC, DiFiori JP, Guskiewicz KM, Mihalik JP, LaConte SM, Duma SM, Broglio SP, Saykin AJ, McCrea M, McAllister TW, Wu YC. Acute White-Matter Abnormalities in Sports-Related Concussion: A Diffusion Tensor Imaging Study from the NCAA-DoD CARE Consortium. J Neurotrauma 2018; 35:2653-2664. [PMID: 29065805 DOI: 10.1089/neu.2017.5158] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Sports-related concussion (SRC) is an important public health issue. Although standardized assessment tools are useful in the clinical management of acute concussion, the underlying pathophysiology of SRC and the time course of physiological recovery after injury remain unclear. In this study, we used diffusion tensor imaging (DTI) to detect white matter alterations in football players within 48 h after SRC. As part of the NCAA-DoD CARE Consortium study of SRC, 30 American football players diagnosed with acute concussion and 28 matched controls received clinical assessments and underwent advanced magnetic resonance imaging scans. To avoid selection bias and partial volume effects, whole-brain skeletonized white matter was examined by tract-based spatial statistics to investigate between-group differences in DTI metrics and their associations with clinical outcome measures. Mean diffusivity was significantly higher in brain white matter of concussed athletes, particularly in frontal and subfrontal long white matter tracts. In the concussed group, axial diffusivity was significantly correlated with the Brief Symptom Inventory and there was a similar trend with the symptom severity score of the Sport Concussion Assessment Tool. In addition, concussed athletes with higher fractional anisotropy performed better on the cognitive component of the Standardized Assessment of Concussion. Overall, the results of this study are consistent with the hypothesis that SRC is associated with changes in white matter tracts shortly after injury, and these differences are correlated clinically with acute symptoms and functional impairments.
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Affiliation(s)
- Sourajit Mitra Mustafi
- 1 Department of Radiology and Imaging Sciences, Indiana University School of Medicine , Indianapolis, Indiana
| | - Jaroslaw Harezlak
- 2 Department of Epidemiology and Biostatistics, School of Public Health, Indiana University , Bloomington, Indiana
| | - Kevin M Koch
- 3 Department of Radiology, Medical College of Wisconsin , Milwaukee, Wisconsin
| | - Andrew S Nencka
- 3 Department of Radiology, Medical College of Wisconsin , Milwaukee, Wisconsin
| | - Timothy B Meier
- 4 Department of Neurosurgery, Medical College of Wisconsin , Milwaukee, Wisconsin
| | - John D West
- 1 Department of Radiology and Imaging Sciences, Indiana University School of Medicine , Indianapolis, Indiana
| | - Christopher C Giza
- 5 Department of Neurosurgery, David Geffen School of Medicine at University of California Los Angeles, Division of Pediatric Neurology, Mattel Children's Hospital-UCLA Los Angeles , California
| | - John P DiFiori
- 6 Division of Sports Medicine, Departments of Family Medicine and Orthopedics, University of California Los Angeles , Los Angeles, California
| | - Kevin M Guskiewicz
- 7 Matthew Gfeller Sport-Related Traumatic Brain Injury Research Center, Department of Exercise and Sport Science, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina
| | - Jason P Mihalik
- 7 Matthew Gfeller Sport-Related Traumatic Brain Injury Research Center, Department of Exercise and Sport Science, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina
| | - Stephen M LaConte
- 8 School of Biomedical Engineering and Sciences, Wake-Forest and Virginia Tech University , Virginia Tech Carilion Research Institute, Roanoke, Virginia
| | - Stefan M Duma
- 9 School of Biomedical Engineering and Sciences, Wake-Forest and Virginia Tech University , Blacksburg, Virginia
| | - Steven P Broglio
- 10 NeuroTrauma Research Laboratory, School of Kinesiology, University of Michigan , Ann Arbor, Michigan
| | - Andrew J Saykin
- 1 Department of Radiology and Imaging Sciences, Indiana University School of Medicine , Indianapolis, Indiana
| | - Michael McCrea
- 4 Department of Neurosurgery, Medical College of Wisconsin , Milwaukee, Wisconsin
| | - Thomas W McAllister
- 11 Department of Psychology, Indiana University School of Medicine , Indianapolis, Indiana
| | - Yu-Chien Wu
- 1 Department of Radiology and Imaging Sciences, Indiana University School of Medicine , Indianapolis, Indiana
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Chuckowree JA, Zhu Z, Brizuela M, Lee KM, Blizzard CA, Dickson TC. The Microtubule-Modulating Drug Epothilone D Alters Dendritic Spine Morphology in a Mouse Model of Mild Traumatic Brain Injury. Front Cell Neurosci 2018; 12:223. [PMID: 30104961 PMCID: PMC6077201 DOI: 10.3389/fncel.2018.00223] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Accepted: 07/09/2018] [Indexed: 12/27/2022] Open
Abstract
Microtubule dynamics underpin a plethora of roles involved in the intricate development, structure, function, and maintenance of the central nervous system. Within the injured brain, microtubules are vulnerable to misalignment and dissolution in neurons and have been implicated in injury-induced glial responses and adaptive neuroplasticity in the aftermath of injury. Unfortunately, there is a current lack of therapeutic options for treating traumatic brain injury (TBI). Thus, using a clinically relevant model of mild TBI, lateral fluid percussion injury (FPI) in adult male Thy1-YFPH mice, we investigated the potential therapeutic effects of the brain-penetrant microtubule-stabilizing agent, epothilone D. At 7 days following a single mild lateral FPI the ipsilateral hemisphere was characterized by mild astroglial activation and a stereotypical and widespread pattern of axonal damage in the internal and external capsule white matter tracts. These alterations occurred in the absence of other overt signs of trauma: there were no alterations in cortical thickness or in the number of cortical projection neurons, axons or dendrites expressing YFP. Interestingly, a single low dose of epothilone D administered immediately following FPI (and sham-operation) caused significant alterations in the dendritic spines of layer 5 cortical projection neurons, while the astroglial response and axonal pathology were unaffected. Specifically, spine length was significantly decreased, whereas the density of mushroom spines was significantly increased following epothilone D treatment. Together, these findings have implications for the use of microtubule stabilizing agents in manipulating injury-induced synaptic plasticity and indicate that further study into the viability of microtubule stabilization as a therapeutic strategy in combating TBI is warranted.
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Affiliation(s)
- Jyoti A. Chuckowree
- Menzies Institute for Medical Research, University of Tasmania, Hobart, TAS, Australia
| | - Zhendan Zhu
- Menzies Institute for Medical Research, University of Tasmania, Hobart, TAS, Australia
| | - Mariana Brizuela
- Menzies Institute for Medical Research, University of Tasmania, Hobart, TAS, Australia
- Centre for Neuroscience, School of Medicine, Flinders University, Adelaide, SA, Australia
| | - Ka M. Lee
- Menzies Institute for Medical Research, University of Tasmania, Hobart, TAS, Australia
- The Florey Institute of Neuroscience and Mental Health, Parkville, VIC, Australia
| | - Catherine A. Blizzard
- Menzies Institute for Medical Research, University of Tasmania, Hobart, TAS, Australia
| | - Tracey C. Dickson
- Menzies Institute for Medical Research, University of Tasmania, Hobart, TAS, Australia
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37
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Wu YC, Mustafi SM, Harezlak J, Kodiweera C, Flashman LA, McAllister TW. Hybrid Diffusion Imaging in Mild Traumatic Brain Injury. J Neurotrauma 2018; 35:2377-2390. [PMID: 29786463 PMCID: PMC6196746 DOI: 10.1089/neu.2017.5566] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Mild traumatic brain injury (mTBI) is an important public health problem. Although conventional medical imaging techniques can detect moderate-to-severe injuries, they are relatively insensitive to mTBI. In this study, we used hybrid diffusion imaging (HYDI) to detect white matter alterations in 19 patients with mTBI and 23 other trauma control patients. Within 15 days (standard deviation = 10) of brain injury, all subjects underwent magnetic resonance HYDI and were assessed with a battery of neuropsychological tests of sustained attention, memory, and executive function. Tract-based spatial statistics (TBSS) was used for voxel-wise statistical analyses within the white matter skeleton to study between-group differences in diffusion metrics, within-group correlations between diffusion metrics and clinical outcomes, and between-group interaction effects. The advanced diffusion imaging techniques, including neurite orientation dispersion and density imaging (NODDI) and q-space analyses, appeared to be more sensitive then classic diffusion tensor imaging. Only NODDI-derived intra-axonal volume fraction (Vic) demonstrated significant group differences (i.e., 5–9% lower in the injured brain). Within the mTBI group, Vic and a q-space measure, P0, correlated with 6 of 10 neuropsychological tests, including measures of attention, memory, and executive function. In addition, the direction of correlations differed significantly between groups (R2 > 0.71 and pinteration < 0.03). Specifically, in the control group, higher Vic and P0 were associated with better performances on clinical assessments, whereas in the mTBI group, higher Vic and P0 were associated with worse performances with correlation coefficients >0.83. In summary, the NODDI-derived axonal density index and q-space measure for tissue restriction demonstrated superior sensitivity to white matter changes shortly after mTBI. These techniques hold promise as a neuroimaging biomarker for mTBI.
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Affiliation(s)
- Yu-Chien Wu
- 1 Department of Radiology and Imaging Sciences, Indiana University School of Medicine , Indianapolis, Indiana
| | - Sourajit M Mustafi
- 1 Department of Radiology and Imaging Sciences, Indiana University School of Medicine , Indianapolis, Indiana
| | - Jaroslaw Harezlak
- 2 Department of Epidemiology and Biostatistics, School of Public Health, Indiana University , Bloomington, Indiana
| | - Chandana Kodiweera
- 3 Dartmouth Brain Imaging Center, Dartmouth College , Hanover, New Hampshire
| | - Laura A Flashman
- 4 Department of Psychiatry, Geisel School of Medicine at Dartmouth and Dartmouth-Hitchcock Medical Center , Lebanon, New Hampshire
| | - Thomas W McAllister
- 5 Department of Psychiatry, Indiana University School of Medicine , Indianapolis, Indiana
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38
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Vascak M, Jin X, Jacobs KM, Povlishock JT. Mild Traumatic Brain Injury Induces Structural and Functional Disconnection of Local Neocortical Inhibitory Networks via Parvalbumin Interneuron Diffuse Axonal Injury. Cereb Cortex 2018; 28:1625-1644. [PMID: 28334184 PMCID: PMC5907353 DOI: 10.1093/cercor/bhx058] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Revised: 01/20/2017] [Indexed: 12/18/2022] Open
Abstract
Diffuse axonal injury (DAI) plays a major role in cortical network dysfunction posited to cause excitatory/inhibitory imbalance after mild traumatic brain injury (mTBI). Current thought holds that white matter (WM) is uniquely vulnerable to DAI. However, clinically diagnosed mTBI is not always associated with WM DAI. This suggests an undetected neocortical pathophysiology, implicating GABAergic interneurons. To evaluate this possibility, we used mild central fluid percussion injury to generate DAI in mice with Cre-driven tdTomato labeling of parvalbumin (PV) interneurons. We followed tdTomato+ profiles using confocal and electron microscopy, together with patch-clamp analysis to probe for DAI-mediated neocortical GABAergic interneuron disruption. Within 3 h post-mTBI tdTomato+ perisomatic axonal injury (PSAI) was found across somatosensory layers 2-6. The DAI marker amyloid precursor protein colocalized with GAD67 immunoreactivity within tdTomato+ PSAI, representing the majority of GABAergic interneuron DAI. At 24 h post-mTBI, we used phospho-c-Jun, a surrogate DAI marker, for retrograde assessments of sustaining somas. Via this approach, we estimated DAI occurs in ~9% of total tdTomato+ interneurons, representing ~14% of pan-neuronal DAI. Patch-clamp recordings of tdTomato+ interneurons revealed decreased inhibitory transmission. Overall, these data show that PV interneuron DAI is a consistent and significant feature of experimental mTBI with important implications for cortical network dysfunction.
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Affiliation(s)
- Michal Vascak
- Department of Anatomy and Neurobiology, Virginia Commonwealth University Medical Center, PO Box 980709, Richmond, VA 23298-0709, USA
| | - Xiaotao Jin
- Department of Anatomy and Neurobiology, Virginia Commonwealth University Medical Center, PO Box 980709, Richmond, VA 23298-0709, USA
| | - Kimberle M Jacobs
- Department of Anatomy and Neurobiology, Virginia Commonwealth University Medical Center, PO Box 980709, Richmond, VA 23298-0709, USA
| | - John T Povlishock
- Department of Anatomy and Neurobiology, Virginia Commonwealth University Medical Center, PO Box 980709, Richmond, VA 23298-0709, USA
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Murphy MA, Mun S, Horstemeyer MF, Baskes MI, Bakhtiary A, LaPlaca MC, Gwaltney SR, Williams LN, Prabhu RK. Molecular dynamics simulations showing 1-palmitoyl-2-oleoyl-phosphatidylcholine (POPC) membrane mechanoporation damage under different strain paths. J Biomol Struct Dyn 2018; 37:1346-1359. [DOI: 10.1080/07391102.2018.1453376] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- M. A. Murphy
- Center for Advanced Vehicular Systems (CAVS), Mississippi State University, Mississippi State, MS, USA
- Department of Agricultural and Biological Engineering, Mississippi State University, Mississippi State, MS, USA
| | - Sungkwang Mun
- Center for Advanced Vehicular Systems (CAVS), Mississippi State University, Mississippi State, MS, USA
| | - M. F. Horstemeyer
- Center for Advanced Vehicular Systems (CAVS), Mississippi State University, Mississippi State, MS, USA
- Department of Mechanical Engineering, Mississippi State University, Mississippi State, MS, USA
| | - M. I. Baskes
- Department of Aerospace Engineering, Mississippi State University, Mississippi State, MS, USA
- Los Alamos National Laboratory, Los Alamos, NM, USA
| | - A. Bakhtiary
- Center for Advanced Vehicular Systems (CAVS), Mississippi State University, Mississippi State, MS, USA
- Department of Agricultural and Biological Engineering, Mississippi State University, Mississippi State, MS, USA
| | - Michelle C. LaPlaca
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - Steven R. Gwaltney
- Department of Chemistry, Mississippi State University, Mississippi State, MS 39762, USA
- Center for Computational Sciences, Mississippi State University, Mississippi State, MS 39762, USA
| | - Lakiesha N. Williams
- Center for Advanced Vehicular Systems (CAVS), Mississippi State University, Mississippi State, MS, USA
- Department of Agricultural and Biological Engineering, Mississippi State University, Mississippi State, MS, USA
| | - R. K. Prabhu
- Center for Advanced Vehicular Systems (CAVS), Mississippi State University, Mississippi State, MS, USA
- Department of Agricultural and Biological Engineering, Mississippi State University, Mississippi State, MS, USA
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40
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Primary Traumatic Axonopathy in Mice Subjected to Impact Acceleration: A Reappraisal of Pathology and Mechanisms with High-Resolution Anatomical Methods. J Neurosci 2018; 38:4031-4047. [PMID: 29567804 DOI: 10.1523/jneurosci.2343-17.2018] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Revised: 02/21/2018] [Accepted: 03/15/2018] [Indexed: 11/21/2022] Open
Abstract
Traumatic axonal injury (TAI) is a common neuropathology in traumatic brain injury and is featured by primary injury to axons. Here, we generated TAI with impact acceleration of the head in male Thy1-eYFP-H transgenic mice in which specific populations of neurons and their axons are labeled with yellow fluorescent protein. This model results in axonal lesions in multiple axonal tracts along with blood-brain barrier disruption and neuroinflammation. The corticospinal tract, a prototypical long tract, is severely affected and is the focus of this study. Using optimized CLARITY at single-axon resolution, we visualized the entire corticospinal tract volume from the pons to the cervical spinal cord in 3D and counted the total number of axonal lesions and their progression over time. Our results divulged the presence of progressive traumatic axonopathy that was maximal at the pyramidal decussation. The perikarya of injured corticospinal neurons atrophied, but there was no evidence of neuronal cell death. We also used CLARITY at single-axon resolution to explore the role of the NMNAT2-SARM1 axonal self-destruction pathway in traumatic axonopathy. When we interfered with this pathway by genetically ablating SARM1 or by pharmacological strategies designed to increase levels of Nicotinamide (Nam), a feedback inhibitor of SARM1, we found a significant reduction in the number of axonal lesions early after injury. Our findings show that high-resolution neuroanatomical strategies reveal important features of TAI with biological implications, especially the progressive axonopathic nature of TAI and the role of the NMNAT2-SARM1 pathway in the early stages of axonopathy.SIGNIFICANCE STATEMENT In the first systematic application of novel high-resolution neuroanatomical tools in neuropathology, we combined CLARITY with 2-photon microscopy, optimized for detection of single axonal lesions, to reconstruct the injured mouse brainstem in a model of traumatic axonal injury (TAI) that is a common pathology associated with traumatic brain injury. The 3D reconstruction of the corticospinal tract at single-axon resolution allowed for a more advanced level of qualitative and quantitative understanding of TAI. Using this model, we showed that TAI is an axonopathy with a prominent role of the NMNAT2-SARM1 molecular pathway, that is also implicated in peripheral neuropathy. Our results indicate that high-resolution anatomical models of TAI afford a level of detail and sensitivity that is ideal for testing novel molecular and biomechanical hypotheses.
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de la Tremblaye PB, O'Neil DA, LaPorte MJ, Cheng JP, Beitchman JA, Thomas TC, Bondi CO, Kline AE. Elucidating opportunities and pitfalls in the treatment of experimental traumatic brain injury to optimize and facilitate clinical translation. Neurosci Biobehav Rev 2018; 85:160-175. [PMID: 28576511 PMCID: PMC5709241 DOI: 10.1016/j.neubiorev.2017.05.022] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Accepted: 05/12/2017] [Indexed: 12/19/2022]
Abstract
The aim of this review is to discuss the research presented in a symposium entitled "Current progress in characterizing therapeutic strategies and challenges in experimental CNS injury" which was presented at the 2016 International Behavioral Neuroscience Society annual meeting. Herein we discuss diffuse and focal traumatic brain injury (TBI) and ensuing chronic behavioral deficits as well as potential rehabilitative approaches. We also discuss the effects of stress on executive function after TBI as well as the response of the endocrine system and regulatory feedback mechanisms. The role of the endocannabinoids after CNS injury is also discussed. Finally, we conclude with a discussion of antipsychotic and antiepileptic drugs, which are provided to control TBI-induced agitation and seizures, respectively. The review consists predominantly of published data.
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Affiliation(s)
- Patricia B de la Tremblaye
- Department of Physical Medicine & Rehabilitation, University of Pittsburgh, Pittsburgh, PA, United States; Safar Center for Resuscitation Research, University of Pittsburgh, Pittsburgh, PA, United States
| | - Darik A O'Neil
- Department of Physical Medicine & Rehabilitation, University of Pittsburgh, Pittsburgh, PA, United States; Safar Center for Resuscitation Research, University of Pittsburgh, Pittsburgh, PA, United States
| | - Megan J LaPorte
- Department of Physical Medicine & Rehabilitation, University of Pittsburgh, Pittsburgh, PA, United States; Safar Center for Resuscitation Research, University of Pittsburgh, Pittsburgh, PA, United States
| | - Jeffrey P Cheng
- Department of Physical Medicine & Rehabilitation, University of Pittsburgh, Pittsburgh, PA, United States; Safar Center for Resuscitation Research, University of Pittsburgh, Pittsburgh, PA, United States
| | - Joshua A Beitchman
- Barrow Neurological Institute at Phoenix Children's Hospital, Phoenix, AZ, United States; Department of Child Health, University of Arizona College of Medicine, Phoenix, AZ, United States; Midwestern University, Glendale, AZ, United States
| | - Theresa Currier Thomas
- Barrow Neurological Institute at Phoenix Children's Hospital, Phoenix, AZ, United States; Department of Child Health, University of Arizona College of Medicine, Phoenix, AZ, United States; Phoenix VA Healthcare System, Phoenix, AZ, United States
| | - Corina O Bondi
- Department of Physical Medicine & Rehabilitation, University of Pittsburgh, Pittsburgh, PA, United States; Safar Center for Resuscitation Research, University of Pittsburgh, Pittsburgh, PA, United States; Center for Neuroscience, University of Pittsburgh, Pittsburgh, PA, United States; Department of Neurobiology, University of Pittsburgh, Pittsburgh, PA, United States
| | - Anthony E Kline
- Department of Physical Medicine & Rehabilitation, University of Pittsburgh, Pittsburgh, PA, United States; Safar Center for Resuscitation Research, University of Pittsburgh, Pittsburgh, PA, United States; Center for Neuroscience, University of Pittsburgh, Pittsburgh, PA, United States; Center for the Neural Basis of Cognition, University of Pittsburgh, Pittsburgh, PA, United States; Department of Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA, United States; Department of Psychology, University of Pittsburgh, Pittsburgh, PA, United States.
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Davenport ND, Gullickson JT, Grey SF, Hirsch S, Sponheim SR. Longitudinal evaluation of ventricular volume changes associated with mild traumatic brain injury in military service members. Brain Inj 2018; 32:1245-1255. [PMID: 29985658 DOI: 10.1080/02699052.2018.1494854] [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: 10/28/2022]
Abstract
PRIMARY OBJECTIVE To investigate differences in longitudinal trajectories of ventricle-brain ratio (VBR), a general measure of brain atrophy, between Veterans with and without history of mild traumatic brain injury (mTBI). RESEARCH DESIGN Structural magnetic resonance imaging (MRI) was used to calculate VBR in 70 Veterans with a history of mTBI and 34 Veterans without such history at two time points approximately 3 and 8 years after a combat deployment. MAIN OUTCOMES AND RESULTS Both groups demonstrated a quadratic relationship between VBR and age that is consistent with normal developmental trajectories. Veterans with history of mTBI had larger total brain volume, but no interaction between mTBI and age was observed for brain volume, ventricular volume, or VBR. CONCLUSIONS In our longitudinal sample of deployed Veterans, mTBI was not associated with gross brain atrophy as reflected by abnormally high VBR or abnormal increases in VBR over time.
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Affiliation(s)
- Nicholas D Davenport
- a Minneapolis Veterans Affairs Health Care System , Minneapolis , MN , USA.,b Department of Psychiatry , University of Minnesota , Minneapolis , MN , USA
| | - James T Gullickson
- a Minneapolis Veterans Affairs Health Care System , Minneapolis , MN , USA.,b Department of Psychiatry , University of Minnesota , Minneapolis , MN , USA
| | - Scott F Grey
- c RTI International , Research Triangle Park , NC , USA
| | - Shawn Hirsch
- c RTI International , Research Triangle Park , NC , USA
| | - Scott R Sponheim
- a Minneapolis Veterans Affairs Health Care System , Minneapolis , MN , USA.,b Department of Psychiatry , University of Minnesota , Minneapolis , MN , USA
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- a Minneapolis Veterans Affairs Health Care System , Minneapolis , MN , USA.,b Department of Psychiatry , University of Minnesota , Minneapolis , MN , USA
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43
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O'Neill TJ, Davenport EM, Murugesan G, Montillo A, Maldjian JA. Applications of Resting State Functional MR Imaging to Traumatic Brain Injury. Neuroimaging Clin N Am 2017; 27:685-696. [PMID: 28985937 PMCID: PMC5708891 DOI: 10.1016/j.nic.2017.06.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Traumatic brain injury (TBI) is an important public health issue. TBI includes a broad spectrum of injury severities and abnormalities. Functional MR imaging (fMR imaging), both resting state (rs) and task, has been used often in research to study the effects of TBI. Although rs-fMR imaging is not currently applicable in clinical diagnosis of TBI, computer-aided tools are making this a possibility for the future. Specifically, graph theory is being used to study the change in networks after TBI. Machine learning methods allow researchers to build models capable of predicting injury severity and recovery trajectories.
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Affiliation(s)
- Thomas J O'Neill
- Radiology, University of Texas Southwestern, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA
| | - Elizabeth M Davenport
- Radiology, University of Texas Southwestern, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA
| | - Gowtham Murugesan
- Radiology, University of Texas Southwestern, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA
| | - Albert Montillo
- Radiology, University of Texas Southwestern, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA
| | - Joseph A Maldjian
- Radiology, University of Texas Southwestern, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA.
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Poellmann MJ, Lee RC. Repair and Regeneration of the Wounded Cell Membrane. REGENERATIVE ENGINEERING AND TRANSLATIONAL MEDICINE 2017. [DOI: 10.1007/s40883-017-0031-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Yap YC, King AE, Guijt RM, Jiang T, Blizzard CA, Breadmore MC, Dickson TC. Mild and repetitive very mild axonal stretch injury triggers cystoskeletal mislocalization and growth cone collapse. PLoS One 2017; 12:e0176997. [PMID: 28472086 PMCID: PMC5417565 DOI: 10.1371/journal.pone.0176997] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Accepted: 04/20/2017] [Indexed: 12/28/2022] Open
Abstract
Diffuse axonal injury is a hallmark pathological consequence of non-penetrative traumatic brain injury (TBI) and yet the axonal responses to stretch injury are not fully understood at the cellular level. Here, we investigated the effects of mild (5%), very mild (0.5%) and repetitive very mild (2×0.5%) axonal stretch injury on primary cortical neurons using a recently developed compartmentalized in vitro model. We found that very mild and mild levels of stretch injury resulted in the formation of smaller growth cones at the tips of axons and a significantly higher number of collapsed structures compared to those present in uninjured cultures, when measured at both 24 h and 72 h post injury. Immunocytochemistry studies revealed that at 72 h following mild injury the axonal growth cones had a significantly higher colocalization of βIII tubulin and F-actin and higher percentage of collapsed morphology than those present following a very mild injury. Interestingly, cultures that received a second very mild stretch injury, 24 h after the first insult, had a further increased proportion of growth cone collapse and increased βIII tubulin and F-actin colocalization, compared with a single very mild injury at 72 h PI. In addition, our results demonstrated that microtubule stabilization of axons using brain penetrant Epothilone D (EpoD) (100 nM) resulted in a significant reduction in the number of fragmented axons following mild injury. Collectively, these results suggest that mild and very mild stretch injury to a very localized region of the cortical axon is able to trigger a degenerative response characterized by growth cone collapse and significant abnormal cytoskeletal rearrangement. Furthermore, repetitive very mild stretch injury significantly exacerbated this response. Results suggest that axonal degeneration following stretch injury involves destabilization of the microtubule cytoskeleton and hence treatment with EpoD reduced fragmentation. Together, these results contribute a better understanding of the pathogenesis of mild and repetitive TBI and highlight the therapeutic effect of microtubule targeted drugs on distal part of neurons using a compartmentalized culturing model.
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Affiliation(s)
- Yiing C. Yap
- Menzies Institute for Medical Research, University of Tasmania, Tasmania, Australia
- Wicking Dementia Research and Education Centre, University of Tasmania, Tasmania, Australia
- Pharmacy School of Medicine, Australian Centre for Research on Separation Science (ACROSS), University of Tasmania, Tasmania, Australia
- ACROSS, School of Physical Sciences, University of Tasmania, Tasmania, Australia
| | - Anna E. King
- Wicking Dementia Research and Education Centre, University of Tasmania, Tasmania, Australia
| | - Rosanne M. Guijt
- Pharmacy School of Medicine, Australian Centre for Research on Separation Science (ACROSS), University of Tasmania, Tasmania, Australia
| | - Tongcui Jiang
- Menzies Institute for Medical Research, University of Tasmania, Tasmania, Australia
| | | | - Michael C. Breadmore
- ACROSS, School of Physical Sciences, University of Tasmania, Tasmania, Australia
| | - Tracey C. Dickson
- Menzies Institute for Medical Research, University of Tasmania, Tasmania, Australia
- * E-mail:
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46
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Johnson VE, Stewart W, Arena JD, Smith DH. Traumatic Brain Injury as a Trigger of Neurodegeneration. ADVANCES IN NEUROBIOLOGY 2017; 15:383-400. [PMID: 28674990 DOI: 10.1007/978-3-319-57193-5_15] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Although millions of individuals suffer a traumatic brain injury (TBI) worldwide each year, it is only recently that TBI has been recognized as a major public health problem. Beyond the acute clinical manifestations, there is growing recognition that a single severe TBI (sTBI) or repeated mild TBIs (rTBI) can also induce insidious neurodegenerative processes, which may be associated with early dementia, in particular chronic traumatic encephalopathy (CTE). Identified at autopsy examination in individuals with histories of exposure to sTBI or rTBI, CTE is recognized as a complex pathology featuring both macroscopic and microscopic abnormalities. These include cavum septum pellucidum, brain atrophy and ventricular dilation, together with pathologies in tau, TDP-43, and amyloid-β. However, the establishment and characterization of CTE as a distinct disease entity is in its infancy. Moreover, the relative "dose" of TBI, such as the frequency and severity of injury, associated with risk of CTE remains unknown. As such, there is a clear and pressing need to improve the recognition and diagnosis of CTE and to identify mechanistic links between TBI and chronic neurodegeneration.
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Affiliation(s)
- Victoria E Johnson
- Department of Neurosurgery, Penn Center for Brain Injury and Repair, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - William Stewart
- Department of Neurosurgery, Penn Center for Brain Injury and Repair, University of Pennsylvania, Philadelphia, PA, 19104, USA.,Department of Neuropathology, Queen Elizabeth University Hospital, Glasgow, G51 4TF, UK.,University of Glasgow, Glasgow, G12 8QQ, UK
| | - John D Arena
- Department of Neurosurgery, Penn Center for Brain Injury and Repair, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Douglas H Smith
- Department of Neurosurgery, Penn Center for Brain Injury and Repair, University of Pennsylvania, Philadelphia, PA, 19104, USA.
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Jang SH, Kwon HG. Delayed degeneration of an injured spinothalamic tract in a patient with diffuse axonal injury. Neural Regen Res 2017; 12:1927-1928. [PMID: 29239341 PMCID: PMC5745849 DOI: 10.4103/1673-5374.219056] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Affiliation(s)
- Sung Ho Jang
- Department of Physical Medicine and Rehabilitation, College of Medicine, Yeungnam University, Daemyungdong, Namku, Daegu, Republic of Korea
| | - Hyeok Gyu Kwon
- Department of Physical Therapy, College of Health Sciences, Catholic University of Pusan, Pusan, Republic of Korea
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Khalili H, Niakan A, Ghaffarpasand F. Effects of cerebrolysin on functional recovery in patients with severe disability after traumatic brain injury: A historical cohort study. Clin Neurol Neurosurg 2017; 152:34-38. [DOI: 10.1016/j.clineuro.2016.11.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Revised: 11/11/2016] [Accepted: 11/12/2016] [Indexed: 11/29/2022]
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Dekmak A, Mantash S, Shaito A, Toutonji A, Ramadan N, Ghazale H, Kassem N, Darwish H, Zibara K. Stem cells and combination therapy for the treatment of traumatic brain injury. Behav Brain Res 2016; 340:49-62. [PMID: 28043902 DOI: 10.1016/j.bbr.2016.12.039] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2016] [Revised: 10/30/2016] [Accepted: 12/29/2016] [Indexed: 12/15/2022]
Abstract
TBI is a nondegenerative, noncongenital insult to the brain from an external mechanical force; for instance a violent blow in a car accident. It is a complex injury with a broad spectrum of symptoms and has become a major cause of death and disability in addition to being a burden on public health and societies worldwide. As such, finding a therapy for TBI has become a major health concern for many countries, which has led to the emergence of many monotherapies that have shown promising effects in animal models of TBI, but have not yet proven any significant efficacy in clinical trials. In this paper, we will review existing and novel TBI treatment options. We will first shed light on the complex pathophysiology and molecular mechanisms of this disorder, understanding of which is a necessity for launching any treatment option. We will then review most of the currently available treatments for TBI including the recent approaches in the field of stem cell therapy as an optimal solution to treat TBI. Therapy using endogenous stem cells will be reviewed, followed by therapies utilizing exogenous stem cells from embryonic, induced pluripotent, mesenchymal, and neural origin. Combination therapy is also discussed as an emergent novel approach to treat TBI. Two approaches are highlighted, an approach concerning growth factors and another using ROCK inhibitors. These approaches are highlighted with regard to their benefits in minimizing the outcomes of TBI. Finally, we focus on the consequent improvements in motor and cognitive functions after stem cell therapy. Overall, this review will cover existing treatment options and recent advancements in TBI therapy, with a focus on the potential application of these strategies as a solution to improve the functional outcomes of TBI.
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Affiliation(s)
- AmiraSan Dekmak
- ER045, Laboratory of Stem Cells, Faculty of Sciences, DSST, PRASE, Lebanese University, Beirut, Lebanon
| | - Sarah Mantash
- ER045, Laboratory of Stem Cells, Faculty of Sciences, DSST, PRASE, Lebanese University, Beirut, Lebanon; Department of Biochemistry and Molecular Genetics, American University of Beirut, Beirut, Lebanon
| | - Abdullah Shaito
- Department of Biological and Chemical Sciences, Lebanese International University, Beirut, Lebanon
| | - Amer Toutonji
- Department of Biochemistry and Molecular Genetics, American University of Beirut, Beirut, Lebanon
| | - Naify Ramadan
- ER045, Laboratory of Stem Cells, Faculty of Sciences, DSST, PRASE, Lebanese University, Beirut, Lebanon; Department of Biochemistry and Molecular Genetics, American University of Beirut, Beirut, Lebanon
| | - Hussein Ghazale
- Department of Biochemistry and Molecular Genetics, American University of Beirut, Beirut, Lebanon
| | - Nouhad Kassem
- ER045, Laboratory of Stem Cells, Faculty of Sciences, DSST, PRASE, Lebanese University, Beirut, Lebanon
| | - Hala Darwish
- Faculty of Medicine, Hariri School of Nursing, American University of Beirut, Beirut, Lebanon
| | - Kazem Zibara
- ER045, Laboratory of Stem Cells, Faculty of Sciences, DSST, PRASE, Lebanese University, Beirut, Lebanon; Laboratory of Cardiovascular Diseases and Stem Cells, Biology Department, Faculty of Sciences-I, Lebanese University, Beirut, Lebanon.
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50
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Does time heal all wounds? Experimental diffuse traumatic brain injury results in persisting histopathology in the thalamus. Behav Brain Res 2016; 340:137-146. [PMID: 28042008 DOI: 10.1016/j.bbr.2016.12.038] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Revised: 11/30/2016] [Accepted: 12/28/2016] [Indexed: 11/21/2022]
Abstract
BACKGROUND Thalamic dysfunction has been implicated in overall chronic neurological dysfunction after traumatic brain injury (TBI), however little is known about the underlying histopathology. In experimental diffuse TBI (dTBI), we hypothesize that persisting histopathological changes in the ventral posteromedial (VPM) nucleus of the thalamus is indicative of progressive circuit reorganization. Since circuit reorganization in the VPM impacts the whisker sensory system, the histopathology could explain the development of hypersensitivity to whisker stimulation by 28days post-injury; similar to light and sound hypersensitivity in human TBI survivors. METHODS Adult, male Sprague-Dawley rats underwent craniotomy and midline fluid percussion injury (FPI) (moderate severity; 1.8-2.0atm) or sham surgery. At 1d, 7d, and 28days post-FPI (d FPI) separate experiments confirmed the cytoarchitecture (Giemsa stain) and evaluated neuropathology (silver stain), activated astrocytes (GFAP), neuron morphology (Golgi stain) and microglial morphology (Iba-1) in the VPM. RESULTS Cytoarchitecture was unchanged throughout the time course, similar to previously published data; however, neuropathology and astrocyte activation were significantly increased at 7d and 28d and activated microglia were present at all time points. Neuron morphology was dynamic over the time course with decreased dendritic complexity (fewer branch points; decreased length of processes) at 7d FPI and return to sham values by 28d FPI. CONCLUSIONS These data indicate that dTBI results in persisting thalamic histopathology out to a chronic time point. While these changes can be indicative of either adaptive (recovery) or maladaptive (neurological dysfunction) circuit reorganization, they also provide a potential mechanism by which maladaptive circuit reorganization could contribute to the development of chronic neurological dysfunction. Understanding the processes that mediate circuit reorganization is critical to the development of future therapies for TBI patients.
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