1
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Sun M, Baker TL, Wilson CT, Brady RD, Yamakawa GR, Wright DK, Mychasiuk R, Vo A, Wilson T, Allen J, McDonald SJ, Shultz SR. Treatment with the vascular endothelial growth factor-A antibody, bevacizumab, has sex-specific effects in a rat model of mild traumatic brain injury. J Cereb Blood Flow Metab 2024; 44:542-555. [PMID: 37933736 PMCID: PMC10981407 DOI: 10.1177/0271678x231212377] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 10/06/2023] [Accepted: 10/09/2023] [Indexed: 11/08/2023]
Abstract
Mild traumatic brain injury (mTBI) involves damage to the cerebrovascular system. Vascular endothelial growth factor-A (VEGF-A) is an important modulator of vascular health and VEGF-A promotes the brain's ability to recover after more severe forms of brain injury; however, the role of VEGF-A in mTBI remains poorly understood. Bevacizumab (BEV) is a monoclonal antibody that binds to VEGF-A and neutralises its actions. To better understand the role of VEGF-A in mTBI recovery, this study examined how BEV treatment affected outcomes in rats given a mTBI. Adult Sprague-Dawley rats were assigned to sham-injury + vehicle treatment (VEH), sham-injury + BEV treatment, mTBI + VEH treatment, mTBI + BEV treatment groups. Treatment was administered intracerebroventricularly via a cannula beginning at the time of injury and continuing until the end of the study. Rats underwent behavioral testing after injury and were euthanized on day 11. In both females and males, BEV had a negative impact on cognitive function. mTBI and BEV treatment increased the expression of inflammatory markers in females. In males, BEV treatment altered markers related to hypoxia and vascular health. These novel findings of sex-specific responses to BEV and mTBI provide important insights into the role of VEGF-A in mTBI.
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Affiliation(s)
- Mujun Sun
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, VIC, Australia
| | - Tamara L Baker
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, VIC, Australia
| | - Campbell T Wilson
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, VIC, Australia
| | - Rhys D Brady
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, VIC, Australia
| | - Glenn R Yamakawa
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, VIC, Australia
| | - David K Wright
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, VIC, Australia
| | - Richelle Mychasiuk
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, VIC, Australia
| | - Anh Vo
- Monash Health Translation Precinct, Monash University, Melbourne, VIC, Australia
| | - Trevor Wilson
- Monash Health Translation Precinct, Monash University, Melbourne, VIC, Australia
| | - Josh Allen
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, VIC, Australia
| | - Stuart J McDonald
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, VIC, Australia
| | - Sandy R Shultz
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, VIC, Australia
- Health Sciences, Vancouver Island University, Nanaimo, BC, Canada
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2
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Kommireddy RS, Mehra S, Pompilus M, Arja RD, Zhu T, Yang Z, Fu Y, Zhu J, Kobeissy F, Wang KKW, Febo M. Functional connectivity, tissue microstructure and T2 at 11.1 Tesla distinguishes neuroadaptive differences in two traumatic brain injury models in rats: A Translational Outcomes Project in NeuroTrauma (TOP-NT) UG3 phase study. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.12.10.570975. [PMID: 38168381 PMCID: PMC10760004 DOI: 10.1101/2023.12.10.570975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
The damage caused by contusive traumatic brain injuries (TBIs) is thought to involve breakdown in neuronal communication through focal and diffuse axonal injury along with alterations to the neuronal chemical environment, which adversely affects neuronal networks beyond the injury epicenter(s). In the present study, functional connectivity along with brain tissue microstructure coupled with T2 relaxometry were assessed in two experimental TBI models in rat, controlled cortical impact (CCI) and lateral fluid percussive injury (LFPI). Rats were scanned on an 11.1 Tesla scanner on days 2 and 30 following either CCI or LFPI. Naive controls were scanned once and used as a baseline comparison for both TBI groups. Scanning included functional magnetic resonance imaging (fMRI), diffusion weighted images (DWI), and multi-echo T2 images. fMRI scans were analyzed for functional connectivity across laterally and medially located region of interests (ROIs) across the cortical mantle, hippocampus, and dorsal striatum. DWI scans were processed to generate maps of fractional anisotropy, mean, axial, and radial diffusivities (FA, MD, AD, RD). The analyses focused on cortical and white matter (WM) regions at or near the TBI epicenter. Our results indicate that rats exposed to CCI and LFPI had significantly increased contralateral intra-cortical connectivity at 2 days post-injury. This was observed across similar areas of the cortex in both groups. The increased contralateral connectivity was still observed by day 30 in CCI, but not LFPI rats. Although both CCI and LFPI had changes in WM and cortical FA and diffusivities, WM changes were most predominant in CCI and cortical changes in LFPI. Our results provide support for the use of multimodal MR imaging for different types of contusive and skull-penetrating injury.
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Kamali A, Dieckhaus L, Peters EC, Preszler CA, Witte RS, Pires PW, Hutchinson EB, Laksari K. Ultrasound, photoacoustic, and magnetic resonance imaging to study hyperacute pathophysiology of traumatic and vascular brain injury. J Neuroimaging 2023; 33:534-546. [PMID: 37183044 PMCID: PMC10525021 DOI: 10.1111/jon.13115] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 04/29/2023] [Accepted: 05/02/2023] [Indexed: 05/16/2023] Open
Abstract
BACKGROUND AND PURPOSE Cerebrovascular dynamics and pathomechanisms that evolve in the minutes and hours following traumatic vascular injury in the brain remain largely unknown. We investigated the pathophysiology evolution in mice within the first 3 hours after closed-head traumatic brain injury (TBI) and subarachnoid hemorrhage (SAH), two significant traumatic vascular injuries. METHODS We took a multimodal imaging approach using photoacoustic imaging, color Doppler ultrasound, and MRI to track injury outcomes using a variety of metrics. RESULTS Brain oxygenation and velocity-weighted volume of blood flow (VVF) values significantly decreased from baseline to 15 minutes after both TBI and SAH. TBI resulted in 19.2% and 41.0% ipsilateral oxygenation and VVF reductions 15 minutes postinjury, while SAH resulted in 43.9% and 85.0% ipsilateral oxygenation and VVF reduction (p < .001). We found partial recovery of oxygenation from 15 minutes to 3 hours after injury for TBI but not SAH. Hemorrhage, edema, reduced perfusion, and altered diffusivity were evident from MRI scans acquired 90-150 minutes after injury in both injury models, although the spatial distribution was mostly focal for TBI and diffuse for SAH. CONCLUSIONS The results reveal that the cerebral oxygenation deficits immediately following injuries are reversible for TBI and irreversible for SAH. Our findings can inform future studies on mitigating these early responses to improve long-term recovery.
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Affiliation(s)
- Ali Kamali
- Department of Biomedical Engineering, University of Arizona College of Engineering, Tucson, AZ
| | - Laurel Dieckhaus
- Department of Biomedical Engineering, University of Arizona College of Engineering, Tucson, AZ
| | - Emily C. Peters
- Department of Physiology, University of Arizona College of Medicine, Tucson, AZ
| | - Collin A. Preszler
- Department of Biomedical Engineering, University of Arizona College of Engineering, Tucson, AZ
| | - Russel S. Witte
- Department of Biomedical Engineering, University of Arizona College of Engineering, Tucson, AZ
- Department of Medical Imaging, University of Arizona College of Medicine, Tucson, AZ
- College of Optical Sciences, University of Arizona, Tucson, AZ
| | - Paulo W. Pires
- Department of Physiology, University of Arizona College of Medicine, Tucson, AZ
| | - Elizabeth B. Hutchinson
- Department of Biomedical Engineering, University of Arizona College of Engineering, Tucson, AZ
| | - Kaveh Laksari
- Department of Biomedical Engineering, University of Arizona College of Engineering, Tucson, AZ
- Department of Aerospace and Mechanical Engineering, University of Arizona College of Engineering, Tucson, AZ
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4
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Sun M, Baker TL, Wilson CT, Brady RD, Mychasiuk R, Yamakawa GR, Vo A, Wilson T, McDonald SJ, Shultz SR. Treatment with vascular endothelial growth factor-A worsens cognitive recovery in a rat model of mild traumatic brain injury. Front Mol Neurosci 2022; 15:937350. [PMID: 36385769 PMCID: PMC9643175 DOI: 10.3389/fnmol.2022.937350] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Accepted: 09/29/2022] [Indexed: 09/08/2023] Open
Abstract
Mild traumatic brain injury (mTBI) is a common and unmet clinical issue, with limited treatments available to improve recovery. The cerebrovascular system is vital to provide oxygen and nutrition to the brain, and a growing body of research indicates that cerebrovascular injury contributes to mTBI symptomatology. Vascular endothelial growth factor-A (VEGF-A) is a potent promoter of angiogenesis and an important modulator of vascular health. While indirect evidence suggests that increased bioavailability of VEGF-A may be beneficial after mTBI, the direct therapeutic effects of VEGF-A in this context remains unknown. This study therefore aimed to determine whether intracerebroventricular administration of recombinant VEGF-A could improve recovery from mTBI in a rat model. Male and female Sprague-Dawley rats were assigned to four groups: sham + vehicle (VEH), sham + VEGF-A, mTBI + VEH, mTBI + VEGF-A. The mTBI was induced using the lateral impact model, and treatment began at the time of the injury and continued until the end of the study. Rats underwent behavioral testing between days 1 and 10 post-injury, and were euthanized on day 11 for post-mortem analysis. In males, the mTBI + VEGF-A group had significantly worse cognitive recovery in the water maze than all other groups. In females, the VEGF treatment worsened cognitive performance in the water maze regardless of mTBI or sham injury. Analysis of hippocampal tissue found that these cognitive deficits occurred in the presence of gene expression changes related to neuroinflammation and hypoxia in both male and female rats. These findings indicate that the VEGF-A treatment paradigm tested in this study failed to improve mTBI outcomes in either male or female rats.
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Affiliation(s)
- Mujun Sun
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, VIC, Australia
| | - Tamara L. Baker
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, VIC, Australia
| | - Campbell T. Wilson
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, VIC, Australia
| | - Rhys D. Brady
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, VIC, Australia
| | - Richelle Mychasiuk
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, VIC, Australia
| | - Glenn R. Yamakawa
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, VIC, Australia
| | - Anh Vo
- Monash Health Translation Precinct, Monash University, Melbourne, VIC, Australia
| | - Trevor Wilson
- Monash Health Translation Precinct, Monash University, Melbourne, VIC, Australia
| | - Stuart J. McDonald
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, VIC, Australia
| | - Sandy R. Shultz
- Department of Neuroscience, Central Clinical School, Monash University, Melbourne, VIC, Australia
- Department of Medicine, The University of Melbourne, Parkville, VIC, Australia
- Health and Human Services, Vancouver Island University, Nanaimo, BC, Canada
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5
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Huang S, Shen Q, Watts LT, Long JA, O'Boyle M, Nguyen T, Muir E, Duong TQ. Resting-State Functional Magnetic Resonance Imaging of Interhemispheric Functional Connectivity in Experimental Traumatic Brain Injury. Neurotrauma Rep 2021; 2:526-540. [PMID: 34901946 PMCID: PMC8655818 DOI: 10.1089/neur.2021.0023] [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] [Indexed: 11/12/2022] Open
Abstract
Although resting-state functional magnetic resonance imaging (rsfMRI) has the potential to offer insights into changes in functional connectivity networks after traumatic brain injury (TBI), there are few studies that examine the effects of moderate TBI for monitoring functional recovery in experimental TBI, and thus the neural correlates of brain recovery from moderate TBI remain incompletely understood. Non-invasive rsfMRI was used to longitudinally investigate changes in interhemispheric functional connectivity (IFC) after a moderate TBI to the unilateral sensorimotor cortex in rats (n = 9) up to 14 days. Independent component analysis of the rsfMRI data was performed. Correlations of rsfMRI sensorimotor networks were made with changes in behavioral scores, lesion volume, and T2- and diffusion-weighted images across time. TBI animals showed less localized rsfMRI patterns in the sensorimotor network compared to sham (n = 6) and normal (n = 5) animals. rsfMRI clusters in the sensorimotor network showed less bilateral symmetry compared to sham and normal animals, indicative of IFC disruption. With time after injury, many of the rsfMRI patterns in the sensorimotor network showed more bilateral symmetry, indicative of IFC recovery. The disrupted IFC in the sensorimotor and subsequent partial recovery showed a positive correlation with changes in behavioral scores. Overall, rsfMRI detected widespread disruption and subsequent recovery of IFC within the sensorimotor networks post-TBI, which correlated with behavioral changes. Therefore, rsfMRI offers the means to probe functional brain reorganization and thus has the potential to serve as an imaging marker to longitudinally stage TBI and monitor for novel treatments.
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Affiliation(s)
- Shiliang Huang
- Research Imaging Institute, UT Health San Antonio, San Antonio, Texas, USA
| | - Qiang Shen
- Research Imaging Institute, UT Health San Antonio, San Antonio, Texas, USA.,Department of Radiology, UT Health San Antonio, San Antonio, Texas, USA
| | - Lora Talley Watts
- Department of Clinical and Applied Science Education, University of the Incarnate Word School of Osteopathic Medicine, San Antonio, Texas, USA
| | - Justin A Long
- Research Imaging Institute, UT Health San Antonio, San Antonio, Texas, USA
| | - Michael O'Boyle
- Research Imaging Institute, UT Health San Antonio, San Antonio, Texas, USA
| | - Tony Nguyen
- Department of Radiology, Montefiore Medical Center and Albert Einstein College of Medicine, Bronx, New York, New York, USA
| | - Eric Muir
- Department of Radiology, Stony Brook Medicine, Stony Brook, New York, USA
| | - Timothy Q Duong
- Department of Radiology, Montefiore Medical Center and Albert Einstein College of Medicine, Bronx, New York, New York, USA
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6
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Baker TL, Agoston DV, Brady RD, Major B, McDonald SJ, Mychasiuk R, Wright DK, Yamakawa GR, Sun M, Shultz SR. Targeting the Cerebrovascular System: Next-Generation Biomarkers and Treatment for Mild Traumatic Brain Injury. Neuroscientist 2021; 28:594-612. [PMID: 33966527 DOI: 10.1177/10738584211012264] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The diagnosis, prognosis, and treatment of mild traumatic brain injuries (mTBIs), such as concussions, are significant unmet medical issues. The kinetic forces that occur in mTBI adversely affect the cerebral vasculature, making cerebrovascular injury (CVI) a pathophysiological hallmark of mTBI. Given the importance of a healthy cerebrovascular system in overall brain function, CVI is likely to contribute to neurological dysfunction after mTBI. As such, CVI and related pathomechanisms may provide objective biomarkers and therapeutic targets to improve the clinical management and outcomes of mTBI. Despite this potential, until recently, few studies have focused on the cerebral vasculature in this context. This article will begin by providing a brief overview of the cerebrovascular system followed by a review of the literature regarding how mTBI can affect the integrity and function of the cerebrovascular system, and how this may ultimately contribute to neurological dysfunction and neurodegenerative conditions. We then discuss promising avenues of research related to mTBI biomarkers and interventions that target CVI, and conclude that a clinical approach that takes CVI into account could result in substantial improvements in the care and outcomes of patients with mTBI.
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Affiliation(s)
- Tamara L Baker
- Department of Neuroscience, Monash University, Melbourne, Victoria, Australia
| | - Denes V Agoston
- Department of Anatomy, Physiology, and Genetics, Uniformed Services University, Bethesda, MD, USA
| | - Rhys D Brady
- Department of Neuroscience, Monash University, Melbourne, Victoria, Australia.,Department of Medicine, The University of Melbourne, Parkville, Victoria, Australia
| | - Brendan Major
- Department of Neuroscience, Monash University, Melbourne, Victoria, Australia
| | - Stuart J McDonald
- Department of Neuroscience, Monash University, Melbourne, Victoria, Australia.,Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, Victoria, Australia
| | - Richelle Mychasiuk
- Department of Neuroscience, Monash University, Melbourne, Victoria, Australia
| | - David K Wright
- Department of Neuroscience, Monash University, Melbourne, Victoria, Australia
| | - Glenn R Yamakawa
- Department of Neuroscience, Monash University, Melbourne, Victoria, Australia
| | - Mujun Sun
- Department of Neuroscience, Monash University, Melbourne, Victoria, Australia
| | - Sandy R Shultz
- Department of Neuroscience, Monash University, Melbourne, Victoria, Australia.,Department of Medicine, The University of Melbourne, Parkville, Victoria, Australia
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7
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Ichkova A, Rodriguez-Grande B, Zub E, Saudi A, Fournier ML, Aussudre J, Sicard P, Obenaus A, Marchi N, Badaut J. Early cerebrovascular and long-term neurological modifications ensue following juvenile mild traumatic brain injury in male mice. Neurobiol Dis 2020; 141:104952. [PMID: 32442681 DOI: 10.1016/j.nbd.2020.104952] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2020] [Revised: 05/05/2020] [Accepted: 05/17/2020] [Indexed: 12/15/2022] Open
Abstract
Clinical evidence suggests that a mild traumatic brain injury occurring at a juvenile age (jmTBI) may be sufficient to elicit pathophysiological modifications. However, clinical reports are not adequately integrated with experimental studies examining brain changes occurring post-jmTBI. We monitored the cerebrovascular modifications and assessed the long-term behavioral and electrographic changes resulting from experimental jmTBI. In vivo photoacoustic imaging demonstrated a decrease of cerebrovascular oxygen saturation levels in the impacted area hours post-jmTBI. Three days post-jmTBI oxygenation returned to pre-jmTBI levels, stabilizing at 7 and 30 days after the injury. At the functional level, cortical arterioles displayed no NMDA vasodilation response, while vasoconstriction induced by thromboxane receptor agonist was enhanced at 1 day post-jmTBI. Arterioles showed abnormal NMDA vasodilation at 3 days post-jmTBI, returning to normality at 7 days post injury. Histology showed changes in vessel diameters from 1 to 30 days post-jmTBI. Neurological evaluation indicated signs of anxiety-like behavior up to 30 days post-jmTBI. EEG recordings performed at the cortical site of impact 30 days post-jmTBI did not indicate seizures activity, although it revealed a reduction of gamma waves as compared to age matched sham. Histology showed decrease of neuronal filament staining. In conclusion, experimental jmTBI triggers an early cerebrovascular hypo‑oxygenation in vivo and faulty vascular reactivity. The exact topographical coherence and the direct casualty between early cerebrovascular changes and the observed long-term neurological modifications remain to be investigated. A potential translational value for cerebro-vascular oxygen monitoring in jmTBI is discussed.
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Affiliation(s)
| | | | - Emma Zub
- Cerebrovascular and Glia Research Laboratory, Department of Neuroscience, Institute of Functional Genomics (UMR 5203 CNRS-U1191 INSERM, University of Montpellier), Montpellier, France
| | - Amel Saudi
- Cerebrovascular and Glia Research Laboratory, Department of Neuroscience, Institute of Functional Genomics (UMR 5203 CNRS-U1191 INSERM, University of Montpellier), Montpellier, France
| | | | | | - Pierre Sicard
- INSERM, CNRS, Université de Montpellier, PhyMedExp, IPAM, Montpellier, France
| | - André Obenaus
- CNRS UMR5287, University of Bordeaux, Bordeaux, France; Department of Pediatrics, Loma Linda University School of Medicine, Loma Linda, CA, USA; Basic Science Department, Loma Linda University School of Medicine, Loma Linda, CA, USA; Center for Glial-Neuronal Interactions, Division of Biomedical Sciences, UC Riverside, Riverside, CA, USA; Department of Pediatrics, University of California, Irvine, Irvine, CA, USA
| | - Nicola Marchi
- Cerebrovascular and Glia Research Laboratory, Department of Neuroscience, Institute of Functional Genomics (UMR 5203 CNRS-U1191 INSERM, University of Montpellier), Montpellier, France.
| | - Jerome Badaut
- CNRS UMR5287, University of Bordeaux, Bordeaux, France; Basic Science Department, Loma Linda University School of Medicine, Loma Linda, CA, USA.
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8
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Dinet V, Petry KG, Badaut J. Brain-Immune Interactions and Neuroinflammation After Traumatic Brain Injury. Front Neurosci 2019; 13:1178. [PMID: 31780883 PMCID: PMC6861304 DOI: 10.3389/fnins.2019.01178] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2019] [Accepted: 10/18/2019] [Indexed: 01/04/2023] Open
Abstract
Traumatic brain injury (TBI) is the principal cause of death and disability in children and young adults. Clinical and preclinical research efforts have been carried out to understand the acute, life-threatening pathophysiological events happening after TBI. In the past few years, however, it was recognized that TBI causes significant morbidity weeks, months, or years after the initial injury, thereby contributing substantially to the overall burden of TBI and the decrease of life expectancy in these patients. Long-lasting sequels of TBI include cognitive decline/dementia, sensory-motor dysfunction, and psychiatric disorders, and most important for patients is the need for socio-economic rehabilitation affecting their quality of life. Cerebrovascular alterations have been described during the first week after TBI for direct consequence development of neuroinflammatory process in relation to brain edema. Within the brain-immune interactions, the complement system, which is a family of blood and cell surface proteins, participates in the pathophysiology process. In fact, the complement system is part of the primary defense and clearance component of innate and adaptive immune response. In this review, the complement activation after TBI will be described in relation to the activation of the microglia and astrocytes as well as the blood-brain barrier dysfunction during the first week after the injury. Considering the neuroinflammatory activity as a causal element of neurological handicaps, some major parallel lines of complement activity in multiple sclerosis and Alzheimer pathologies with regard to cognitive impairment will be discussed for chronic TBI. A better understanding of the role of complement activation could facilitate the development of new therapeutic approaches for TBI.
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Affiliation(s)
- Virginie Dinet
- INSERM U1029, Angiogenesis and Neuroinflammation Group, University of Bordeaux, Bordeaux, France
| | - Klaus G. Petry
- INSERM U1029, Angiogenesis and Neuroinflammation Group, University of Bordeaux, Bordeaux, France
| | - Jerome Badaut
- CNRS UMR 5287, INCIA, Brain molecular Imaging Team, University of Bordeaux, Bordeaux, France
- Department of Basic Sciences, Loma Linda University School of Medicine, Loma Linda, CA, United States
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9
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Zhang B, Zhu X, Wang L, Hao S, Xu X, Niu F, He W, Liu B. Dexamethasone impairs neurofunctional recovery in rats following traumatic brain injury by reducing circulating endothelial progenitor cells and angiogenesis. Brain Res 2019; 1725:146469. [PMID: 31541641 DOI: 10.1016/j.brainres.2019.146469] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 08/24/2019] [Accepted: 09/17/2019] [Indexed: 12/11/2022]
Abstract
The administration of glucocorticoids (GCs) after traumatic brain injury (TBI) is controversial. Clinical evidence reveals the deleterious effects of GCs, but the mechanism remains unclear. Previous studies indicate that GCs impair wound healing by affecting endothelial progenitor cell (EPC) function and inhibiting angiogenesis after skin injury. Thus, we hypothesize that the central deleterious effect of GCs is associated with reduced EPCs and angiogenesis after TBI. Using a controlled cortical impact model, we examined the dynamic changes in circulating EPCs and in the regional microcirculation within 14 days of TBI by flow cytometry analysis and contrast-enhanced ultrasound, respectively. The modified neurological severity score (mNSS) and Morris water maze assay were used to assess neurological recovery. Angiogenesis and hippocampal neuron counts were assessed using immunohistochemistry analysis and hematoxylin and eosin staining 14 days after TBI. Compared with the TBI control group, dexamethasone treatment significantly reduced the number of circulating EPCs on days 1, 3, 7 and 14 (P < 0.05); decreased the number of CD31+ cells, the peak intensity and the number of hippocampal neurons on day 14 (P < 0.05); increased the latency on days 12 and 13 (P < 0.05); and reduced the percentage of time spent in the goal quadrant (P < 0.05) on day 14. Similarly, dexamethasone increased the mNSS on days 7 and 14 (P < 0.05). A strong correlation was observed between these results at 14 days after TBI (r = 0.815-0.892, P < 0.05). These data indicate that DEX inhibits the mobilization of EPC levels and angiogenesis around the lesion after TBI, which may contribute to neuronal cell loss and impaired neurofunction.
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Affiliation(s)
- Bin Zhang
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Xueli Zhu
- Department of Ultrasound, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Liang Wang
- Department of Neurosurgery, Tianjin Fifth Center Hospital, Tianjin, China
| | - Shuyu Hao
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Xiaojian Xu
- Beijing Key Laboratory of Central Nervous System Injury, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
| | - Fei Niu
- Beijing Key Laboratory of Central Nervous System Injury, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
| | - Wen He
- Department of Ultrasound, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Baiyun Liu
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China; Beijing Key Laboratory of Central Nervous System Injury, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China; Nerve Injury and Repair Center of Beijing Institute for Brain Disorders, Beijing, China; China National Clinical Research Center for Neurological Diseases, Beijing, China.
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10
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Glober NK, Sprague S, Ahmad S, Mayfield KG, Fletcher LM, Digicaylioglu MH, Sayre NL. Acetazolamide Treatment Prevents Redistribution of Astrocyte Aquaporin 4 after Murine Traumatic Brain Injury. NEUROSCIENCE JOURNAL 2019; 2019:2831501. [PMID: 31187032 PMCID: PMC6521570 DOI: 10.1155/2019/2831501] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 03/14/2019] [Accepted: 03/27/2019] [Indexed: 01/18/2023]
Abstract
After traumatic brain injury (TBI), multiple ongoing processes contribute to worsening and spreading of the primary injury to create a secondary injury. One major process involves disrupted fluid regulation to create vascular and cytotoxic edema in the affected area. Although understanding of factors that influence edema is incomplete, the astrocyte water channel Aquaporin 4 (AQP4) has been identified as an important mediator and therefore attractive drug target for edema prevention. The FDA-approved drug acetazolamide has been administered safely to patients for years in the United States. To test whether acetazolamide altered AQP4 function after TBI, we utilized in vitro and in vivo models of TBI. Our results suggest that AQP4 localization is altered after TBI, similar to previously published reports. Treatment with acetazolamide prevented AQP4 reorganization, both in human astrocyte in vitro and in mice in vivo. Moreover, acetazolamide eliminated cytotoxic edema in our in vivo mouse TBI model. Our results suggest a possible clinical role for acetazolamide in the treatment of TBI.
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Affiliation(s)
- Nancy K. Glober
- Department of Emergency Medicine, Stanford University, Palo Alto, California, USA
| | - Shane Sprague
- Department of Neurosurgery, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA
| | - Sadiya Ahmad
- Department of Neurosurgery, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA
| | - Katherine G. Mayfield
- Department of Neurosurgery, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA
| | - Lauren M. Fletcher
- Department of Neurosurgery, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA
| | - Murat H. Digicaylioglu
- Department of Neurosurgery, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA
| | - Naomi L. Sayre
- Department of Neurosurgery, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA
- South Texas Veteran's Health Care System, San Antonio, Texas, USA
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11
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Truettner JS, Bramlett HM, Dietrich WD. Hyperthermia and Mild Traumatic Brain Injury: Effects on Inflammation and the Cerebral Vasculature. J Neurotrauma 2018; 35:940-952. [PMID: 29108477 DOI: 10.1089/neu.2017.5303] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Mild traumatic brain injury (mTBI) or concussion represents the majority of brain trauma in the United States. The pathophysiology of mTBI is complex and may include both focal and diffuse injury patterns. In addition to altered circuit dysfunction and traumatic axonal injury (TAI), chronic neuroinflammation has also been implicated in the pathophysiology of mTBI. Recently, our laboratory has reported the detrimental effects of mild hyperthermic mTBI in terms of worsening histopathological and behavioral outcomes. To clarify the role of temperature-sensitive neuroinflammatory processes on these consequences, we evaluated the effects of elevated brain temperature (39°C) on altered microglia/macrophage phenotype patterns after mTBI, changes in leukocyte recruitment, and TAI. Sprague-Dawley male rats underwent mild parasagittal fluid-percussion injury under normothermic (37°C) or hyperthermic (39°C) conditions. Cortical and hippocampal regions were analyzed using several cellular and molecular outcome measures. At 24 h, the ratio of iNOS-positive (M1 type phenotype) to arginase-positive (M2 type phenotype) cells after hyperthermic mTBI showed an increase compared with normothermia by flow cytometry. Inflammatory response gene arrays also demonstrated a significant increase in several classes of pro-inflammatory genes with hyperthermia treatment over normothermia. The injury-induced expression of chemokine ligand 2 (Ccl2) and alpha-2-macroglobulin were also increased with hyperthermic mTBI. With western blot analysis, an increase in CD18 and intercellular cell adhesion molecule-1 (ICAM-1) with hyperthermia and a significant increase in Iba1 reactive microglia are reported in the cerebral cortex. Together, these results demonstrate significant differences in the cellular and molecular consequences of raised brain temperature at the time of mTBI. The observed polarization toward a M1-phenotype with mild hyperthermia would be expected to augment chronic inflammatory cascades, sustained functional deficits, and increased vulnerability to secondary insults. Mild elevations in brain temperature may contribute to the more severe and longer lasting consequences of mTBI or concussion reported in some patients.
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Affiliation(s)
- Jessie S Truettner
- Department of Neurological Surgery, The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, Florida
| | - Helen M Bramlett
- Department of Neurological Surgery, The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, Florida
| | - W Dalton Dietrich
- Department of Neurological Surgery, The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, Florida
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12
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Li L, Chopp M, Ding G, Li Q, Mahmood A, Jiang Q. Chronic global analysis of vascular permeability and cerebral blood flow after bone marrow stromal cell treatment of traumatic brain injury in the rat: A long-term MRI study. Brain Res 2017; 1675:61-70. [PMID: 28899758 DOI: 10.1016/j.brainres.2017.09.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 08/29/2017] [Accepted: 09/04/2017] [Indexed: 12/11/2022]
Abstract
Vascular permeability and hemodynamic alteration in response to the transplantation of human bone marrow stromal cells (hMSCs) after traumatic brain injury (TBI) were longitudinally investigated in non directly injured and normal-appearing cerebral tissue using magnetic resonance imaging (MRI). Male Wistar rats (300-350g, n=30) subjected to controlled cortical impact TBI were intravenously injected with 1ml of saline (at 6-h or 1-week post-injury, n=5/group) or with hMSCs in suspension (∼3×106 hMSCs, at 6-h or 1-week post-injury, n=10/group). MRI measurements of T2-weighted imaging, cerebral blood flow (CBF) and blood-to-brain transfer constant (Ki) of gadolinium-diethylenetriamine pentaacetic acid (Gd-DTPA), and neurological behavioral estimates were performed on all animals at multiple time points up to 3-months post-injury. Our long-term imaging data show that blood-brain barrier (BBB) breakdown and hemodynamic disruption after TBI, as revealed by Ki and CBF, respectively, affect both hemispheres of the brain in a diffuse manner. Our data reveal a sensitive vascular permeability and hemodynamic reaction in response to the time-dependent transplantation of hMSCs. A more rapid reduction of Ki following cell treatment is associated with a higher level of CBF in the injured brain, and acute (6h) cell administration leads to enhanced therapeutic effects on both the recovery of vascular integrity and stabilization of cerebral perfusion compared to delayed (1w) cell engraftment. Our results indicate that cell-enhanced BBB reconstitution plays an important role in underlying the restoration of CBF in the injured brain, which in turn, contributes to the improvement of functional outcome.
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Affiliation(s)
- Lian Li
- Department of Neurology, Henry Ford Health System, Detroit, MI 48202, USA.
| | - Michael Chopp
- Department of Neurology, Henry Ford Health System, Detroit, MI 48202, USA; Department of Physics, Oakland University, Rochester, MI 48309, USA.
| | - Guangliang Ding
- Department of Neurology, Henry Ford Health System, Detroit, MI 48202, USA.
| | - Qingjiang Li
- Department of Neurology, Henry Ford Health System, Detroit, MI 48202, USA.
| | - Asim Mahmood
- Department of Neurosurgery, Henry Ford Health System, Detroit, MI 48208, USA.
| | - Quan Jiang
- Department of Neurology, Henry Ford Health System, Detroit, MI 48202, USA.
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13
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Wang W, Zhang H, Lee DH, Yu J, Cheng T, Hong M, Jiang S, Fan H, Huang X, Zhou J, Wang J. Using functional and molecular MRI techniques to detect neuroinflammation and neuroprotection after traumatic brain injury. Brain Behav Immun 2017; 64:344-353. [PMID: 28455264 PMCID: PMC5572149 DOI: 10.1016/j.bbi.2017.04.019] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2016] [Revised: 03/24/2017] [Accepted: 04/24/2017] [Indexed: 12/14/2022] Open
Abstract
This study was designed to investigate whether functional and molecular MRI techniques are sensitive biomarkers for assessment of neuroinflammation and drug efficacy after traumatic brain injury (TBI) in rats. We subjected rats to a controlled cortical impact model and used behavioral tests, histology, and immunofluorescence to assess whether flavonoid pinocembrin provides cerebral protection and improves functional recovery. Most importantly, we used multiple noninvasive structural, functional, and molecular MRI techniques to examine whether the pinocembrin-related neuroprotection and attenuation of neuroinflammation can be detected in vivo. Significant increases in cerebral blood flow (CBF) and amide proton transfer-weighted (APTw) MRI signals were observed in the perilesional areas in untreated TBI rats at 3days and could be attributed to increased glial response. In addition, increased apparent diffusion coefficient and decreased magnetization transfer ratio signals in untreated TBI rats over time were likely due to edema. Post-treatment with pinocembrin decreased microglial/macrophage activation at 3days, consistent with the recovery of CBF and APTw MRI signals in regions of secondary injury. These findings suggest that pinocembrin provides cerebral protection for TBI and that multiple MRI signals, CBF and APTw in particular, are sensitive biomarkers for identification and assessment of neuroinflammation and drug efficacy in the TBI model.
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Affiliation(s)
- Wenzhu Wang
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA,Department of Integrated Chinese and Western Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, Hubei, China
| | - Hong Zhang
- Division of MR Research, Department of Radiology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA,Department of Radiology, Beijing Children’s Hospital, Capital Medical University, Beijing 100045, China
| | - Doon-Hoon Lee
- Division of MR Research, Department of Radiology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Jintao Yu
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, Hubei, China
| | - Tian Cheng
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Michael Hong
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Shanshan Jiang
- Division of MR Research, Department of Radiology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Heng Fan
- Department of Integrated Chinese and Western Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, Hubei, China
| | - Xi Huang
- Gerontology Department, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing 210029, Jiangsu, China; Institute of TCM-Related Comorbid Depression, Nanjing University of Chinese Medicine, 138 Xianling Road, Nanjing 210046, Jiangsu, China.
| | - Jinyuan Zhou
- Division of MR Research, Department of Radiology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA.
| | - Jian Wang
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
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14
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Huang L, Liu Y, Lu J, Cerqueira B, Misra V, Duong TQ. Intraarterial transplantation of human umbilical cord blood mononuclear cells in hyperacute stroke improves vascular function. Stem Cell Res Ther 2017; 8:74. [PMID: 28330501 PMCID: PMC5361847 DOI: 10.1186/s13287-017-0529-y] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Revised: 01/18/2017] [Accepted: 03/04/2017] [Indexed: 12/20/2022] Open
Abstract
Background Human umbilical cord blood (hUCB) cell therapy is a promising treatment for ischemic stroke. The effects of hyperacute stem cell transplantation on cerebrovascular function in ischemic stroke are, however, not well understood. This study evaluated the effects of hyperacute intraarterial transplantation of hUCB mononuclear cells (MNCs) on cerebrovascular function in stroke rats using serial magnetic resonance imaging (MRI). Methods HUCB MNCs or vehicle were administered to stroke rats via the internal carotid artery immediately after reperfusion at 60 min following ischemia onset. Lesion volumes were longitudinally evaluated by MRI on days 0, 2, 14, and 28 after stroke, accompanied by behavioral tests. Cerebral blood flow (CBF) and cerebrovascular reactivity were measured by perfusion MRI and CO2 functional MRI (fMRI) at 28 days post-stroke; corresponding vascular morphological changes were also detected by immunohistology in the same animals. Results We found that CBF to the stroke-affected region at 28 days was improved (normalized CBF value: 1.41 ± 0.30 versus 0.49 ± 0.07) by intraarterial transplantation of hUCB MNCs in the hyperacute stroke phase, compared to vehicle control. Cerebrovascular reactivity within the stroke-affected area, measured by CBF fMRI, was also increased (35.2 ± 3.5% versus 12.8 ± 4.3%), as well as the corresponding cerebrovascular density. Some engrafted cells appeared with microvascular-like morphology and stained positive for von Willebrand Factor (an endothelial cell marker), suggesting they differentiated into endothelial cells. Some engrafted cells also connected to host endothelial cells, suggesting they interacted with the host vasculature. Compared to the vehicle group, infarct volume at 28 days in the stem cell treated group was significantly smaller (160.9 ± 15.7 versus 231.2 ± 16.0 mm3); behavioral deficits were also markedly reduced by stem cell treatment at day 28 (19.5 ± 1.0% versus 30.7 ± 4.7% on the foot fault test; 68.2 ± 4.6% versus 86.6 ± 5.8% on the cylinder test). More tissue within initial perfusion-diffusion mismatch was rescued in the treatment group. Conclusions Intraarterial hUCB MNC transplantation during the hyperacute phase of ischemic stroke improved cerebrovascular function and reduced behavioral deficits and infarct volume.
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Affiliation(s)
- Lei Huang
- Research Imaging Institute, University of Texas Health Science Center, San Antonio, Texas, USA
| | - Yichu Liu
- Department of Biomedical Engineering, University of Texas, San Antonio, Texas, USA
| | - Jianfei Lu
- Research Imaging Institute, University of Texas Health Science Center, San Antonio, Texas, USA
| | - Bianca Cerqueira
- Research Imaging Institute, University of Texas Health Science Center, San Antonio, Texas, USA.,Department of Biomedical Engineering, University of Texas, San Antonio, Texas, USA
| | - Vivek Misra
- Department of Neurology, University of Texas Health Science Center, San Antonio, Texas, USA
| | - Timothy Q Duong
- Research Imaging Institute, University of Texas Health Science Center, San Antonio, Texas, USA. .,Radiology, Stony Brook Medicine, Stony Brook, NY, USA.
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15
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Narayana PA. White matter changes in patients with mild traumatic brain injury: MRI perspective. Concussion 2017; 2:CNC35. [PMID: 30202576 PMCID: PMC6093760 DOI: 10.2217/cnc-2016-0028] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2016] [Accepted: 02/10/2017] [Indexed: 12/20/2022] Open
Abstract
This review focuses on white matter (WM) changes in mild traumatic brain injury (mTBI) as assessed by multimodal MRI. All the peer reviewed publications on WM changes in mTBI from January 2011 through September 2016 are included in this review. This review is organized as follows: introduction to mTBI, the basics of multimodal MRI techniques that are potentially useful for probing the WM integrity, summary and critical evaluation of the published literature on the application of multimodal MRI techniques to assess the changes of WM in mTBI, and correlation of MRI measures with behavioral deficits. The MRI–pathology correlation studies based on preclinical models of mTBI are also reviewed. Finally, the author's perspective of future research directions is described.
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Affiliation(s)
- Ponnada A Narayana
- Department of Diagnostic & Interventional Imaging, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX 77030, USA
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16
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Zhang X, Wang H, Antaris AL, Li L, Diao S, Ma R, Nguyen A, Hong G, Ma Z, Wang J, Zhu S, Castellano JM, Wyss-Coray T, Liang Y, Luo J, Dai H. Traumatic Brain Injury Imaging in the Second Near-Infrared Window with a Molecular Fluorophore. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:6872-9. [PMID: 27253071 PMCID: PMC5293734 DOI: 10.1002/adma.201600706] [Citation(s) in RCA: 254] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Revised: 04/27/2016] [Indexed: 05/04/2023]
Abstract
Traumatic brain injury (TBI) is a leading cause of death and disability worldwide. A bright, renal-excreted, and biocompatible near-infrared II fluorophore for in vivo imaging of TBI is designed. A transient hypoperfusion in the injured cerebral region, followed by fluorophore leakage, is observed. NIR-II fluorophores can provide noninvasive assessment of TBI.
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Affiliation(s)
- Xiaodong Zhang
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
- Department of Physics, School of Science, Tianjin University, Tianjin, 300350, China
| | - Huasen Wang
- Department of Materials Science & Engineering, South University of Science & Technology of China, Shenzhen 518055, China
| | | | - Lulin Li
- Department of Neurology and Neurological Sciences, School of Medicine, Stanford University, Stanford, California 94305, USA
- Center for Tissue Regeneration, Repair and Restoration, VA Palo Alto Health Care System, Palo Alto, CA 94304, USA
| | - Shuo Diao
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
| | - Rui Ma
- Department of Materials Science & Engineering, South University of Science & Technology of China, Shenzhen 518055, China
| | - Andy Nguyen
- Department of Neurology and Neurological Sciences, School of Medicine, Stanford University, Stanford, California 94305, USA
- Center for Tissue Regeneration, Repair and Restoration, VA Palo Alto Health Care System, Palo Alto, CA 94304, USA
| | - Guosong Hong
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
| | - Zuoran Ma
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
| | - Joy Wang
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
| | - Shoujun Zhu
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
| | - Joseph M. Castellano
- Department of Neurology and Neurological Sciences, School of Medicine, Stanford University, Stanford, California 94305, USA
- Center for Tissue Regeneration, Repair and Restoration, VA Palo Alto Health Care System, Palo Alto, CA 94304, USA
| | - Tony Wyss-Coray
- Department of Neurology and Neurological Sciences, School of Medicine, Stanford University, Stanford, California 94305, USA
- Center for Tissue Regeneration, Repair and Restoration, VA Palo Alto Health Care System, Palo Alto, CA 94304, USA
| | - Yongye Liang
- Department of Materials Science & Engineering, South University of Science & Technology of China, Shenzhen 518055, China
| | - Jian Luo
- Department of Neurology and Neurological Sciences, School of Medicine, Stanford University, Stanford, California 94305, USA
- Center for Tissue Regeneration, Repair and Restoration, VA Palo Alto Health Care System, Palo Alto, CA 94304, USA
- Palo Alto Veterans Institute for Research, VA Palo Alto Health Care System, Palo Alto, CA 94304, USA
| | - Hongjie Dai
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
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17
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Jullienne A, Obenaus A, Ichkova A, Savona-Baron C, Pearce WJ, Badaut J. Chronic cerebrovascular dysfunction after traumatic brain injury. J Neurosci Res 2016; 94:609-22. [PMID: 27117494 PMCID: PMC5415378 DOI: 10.1002/jnr.23732] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2015] [Revised: 02/11/2016] [Accepted: 02/28/2016] [Indexed: 12/12/2022]
Abstract
Traumatic brain injuries (TBI) often involve vascular dysfunction that leads to long-term alterations in physiological and cognitive functions of the brain. Indeed, all the cells that form blood vessels and that are involved in maintaining their proper function can be altered by TBI. This Review focuses on the different types of cerebrovascular dysfunction that occur after TBI, including cerebral blood flow alterations, autoregulation impairments, subarachnoid hemorrhage, vasospasms, blood-brain barrier disruption, and edema formation. We also discuss the mechanisms that mediate these dysfunctions, focusing on the cellular components of cerebral blood vessels (endothelial cells, smooth muscle cells, astrocytes, pericytes, perivascular nerves) and their known and potential roles in the secondary injury cascade. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Amandine Jullienne
- Department of Pediatrics, Loma Linda University School of Medicine, Loma Linda, California
| | - Andre Obenaus
- Department of Pediatrics, Loma Linda University School of Medicine, Loma Linda, California
- Department of Physiology, Loma Linda University School of Medicine, Loma Linda, California
- Center for Glial-Neuronal Interactions, Division of Biomedical Sciences, University of California Riverside, Riverside, California
| | | | | | - William J Pearce
- Center for Perinatal Biology, Loma Linda University School of Medicine, Loma Linda, California
| | - Jerome Badaut
- Department of Physiology, Loma Linda University School of Medicine, Loma Linda, California
- CNRS UMR5287, University of Bordeaux, Bordeaux, France
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18
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Zhang XD, Wang H, Antaris AL, Li L, Diao S, Ma R, Nguyen A, Hong G, Ma Z, Wang J, Zhu S, Castellano JM, Wyss-Coray T, Liang Y, Luo J, Dai H. Traumatic Brain Injury Imaging in the Second Near-Infrared Window with a Molecular Fluorophore. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016. [PMID: 27253071 DOI: 10.1002/adma.201600706.] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Traumatic brain injury (TBI) is a leading cause of death and disability worldwide. A bright, renal-excreted, and biocompatible near-infrared II fluorophore for in vivo imaging of TBI is designed. A transient hypoperfusion in the injured cerebral region, followed by fluorophore leakage, is observed. NIR-II fluorophores can provide noninvasive assessment of TBI.
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Affiliation(s)
- Xiao-Dong Zhang
- Department of Chemistry, Stanford University, Stanford, CA, 94305, USA.,Department of Physics, School of Science, Tianjin University, Tianjin, 300354, P. R. China
| | - Huasen Wang
- Department of Materials Science and Engineering, South University of Science and Technology of China, Shenzhen, 518055, P. R. China
| | | | - Lulin Li
- Palo Alto Veterans Institute for Research, VA Palo Alto Health Care System, Palo Alto, CA, 94304, USA
| | - Shuo Diao
- Department of Chemistry, Stanford University, Stanford, CA, 94305, USA
| | - Rui Ma
- Department of Materials Science and Engineering, South University of Science and Technology of China, Shenzhen, 518055, P. R. China
| | - Andy Nguyen
- Palo Alto Veterans Institute for Research, VA Palo Alto Health Care System, Palo Alto, CA, 94304, USA
| | - Guosong Hong
- Department of Chemistry, Stanford University, Stanford, CA, 94305, USA
| | - Zhuoran Ma
- Department of Chemistry, Stanford University, Stanford, CA, 94305, USA
| | - Joy Wang
- Department of Chemistry, Stanford University, Stanford, CA, 94305, USA
| | - Shoujun Zhu
- Department of Chemistry, Stanford University, Stanford, CA, 94305, USA
| | - Joseph M Castellano
- Department of Neurology and Neurological Sciences, School of Medicine, Stanford University, Stanford, CA, 94305, USA
| | - Tony Wyss-Coray
- Department of Neurology and Neurological Sciences, School of Medicine, Stanford University, Stanford, CA, 94305, USA.,Center for Tissue Regeneration, Repair and Restoration, VA Palo Alto Health Care System, Palo Alto, CA, 94304, USA
| | - Yongye Liang
- Department of Materials Science and Engineering, South University of Science and Technology of China, Shenzhen, 518055, P. R. China
| | - Jian Luo
- Department of Neurology and Neurological Sciences, School of Medicine, Stanford University, Stanford, CA, 94305, USA.,Palo Alto Veterans Institute for Research, VA Palo Alto Health Care System, Palo Alto, CA, 94304, USA
| | - Hongjie Dai
- Department of Chemistry, Stanford University, Stanford, CA, 94305, USA
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19
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Abstract
Traumatic brain injury is a major cause of death and disability. This is a brief report based on a symposium presentation to the 2014 Chinese Neurotrauma Association Meeting in San Francisco, USA. It covers the work from our laboratory in applying multimodal MRI to study experimental traumatic brain injury in rats with comparisons made to behavioral tests and histology. MRI protocols include structural, perfusion, manganese-enhanced, diffusion-tensor MRI, and MRI of blood-brain barrier integrity and cerebrovascular reactivity.
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Affiliation(s)
- Timothy Q Duong
- Research Imaging Institute, Departments of Cellular and Structure Biology and Ophthalmology, University of Texas Health Science Center, South Texas Veterans Health Care System, San Antonio, TX, USA
| | - Lora T Watts
- Research Imaging Institute, Departments of Cellular and Structure Biology and Ophthalmology, University of Texas Health Science Center, South Texas Veterans Health Care System, San Antonio, TX, USA
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20
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Abstract
Perfusion could provide useful information on the metabolic status and functional status of tissues and organs. This review summarizes the most commonly used perfusion measurement methods: Dynamic susceptibility contrast (DSC) and arterial spin labeling (ASL) and their applications in experimental stroke. Some new developments of cerebral blood flow (CBF) techniques in animal models are also discussed.
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Affiliation(s)
- Qiang Shen
- Research Imaging Institute, University of Texas Health Science Center, San Antonio, Texas, USA; Department of Ophthalmology, University of Texas Health Science Center, San Antonio, Texas, USA; Department of Radiology, University of Texas Health Science Center, San Antonio, Texas, USA
| | - Timothy Q Duong
- Research Imaging Institute, University of Texas Health Science Center, San Antonio, Texas, USA; Department of Ophthalmology, University of Texas Health Science Center, San Antonio, Texas, USA; Department of Radiology, University of Texas Health Science Center, San Antonio, Texas, USA; South Texas Veterans Health Care System, Department of Veterans Affairs, San Antonio, Texas, USA
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21
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Shen Q, Watts LT, Li W, Duong TQ. Magnetic Resonance Imaging in Experimental Traumatic Brain Injury. Methods Mol Biol 2016; 1462:645-58. [PMID: 27604743 DOI: 10.1007/978-1-4939-3816-2_35] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Traumatic brain injury (TBI) is a leading cause of death and disability in the USA. Common causes of TBI include falls, violence, injuries from wars, and vehicular and sporting accidents. The initial direct mechanical damage in TBI is followed by progressive secondary injuries such as brain swelling, perturbed cerebral blood flow (CBF), abnormal cerebrovascular reactivity (CR), metabolic dysfunction, blood-brain-barrier disruption, inflammation, oxidative stress, and excitotoxicity, among others. Magnetic resonance imaging (MRI) offers the means to noninvasively probe many of these secondary injuries. MRI has been used to image anatomical, physiological, and functional changes associated with TBI in a longitudinal manner. This chapter describes controlled cortical impact (CCI) TBI surgical procedures, a few common MRI protocols used in TBI imaging, and, finally, image analysis pertaining to experimental TBI imaging in rats.
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Affiliation(s)
- Qiang Shen
- Research Imaging Institute, University of Texas Health Science Center, 8403 Floyd Curl Dr, San Antonio, TX, 78229, USA. .,Department of Ophthalmology, University of Texas Health Science Center, San Antonio, TX, USA. .,Department of Radiology, University of Texas Health Science Center, San Antonio, TX, USA.
| | - Lora Tally Watts
- Research Imaging Institute, University of Texas Health Science Center, 8403 Floyd Curl Dr, San Antonio, TX, 78229, USA.,Departments of Cellular and Structure Biology, University of Texas Health Science Center, San Antonio, TX, USA
| | - Wei Li
- Research Imaging Institute, University of Texas Health Science Center, 8403 Floyd Curl Dr, San Antonio, TX, 78229, USA.,Department of Ophthalmology, University of Texas Health Science Center, San Antonio, TX, USA
| | - Timothy Q Duong
- Research Imaging Institute, University of Texas Health Science Center, 8403 Floyd Curl Dr, San Antonio, TX, 78229, USA. .,Department of Ophthalmology, University of Texas Health Science Center, San Antonio, TX, USA. .,Department of Radiology, University of Texas Health Science Center, San Antonio, TX, USA. .,Department of Veterans Affairs, South Texas Veterans Health Care System, San Antonio, TX, USA.
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22
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Watts LT. Stimulating mitochondria to protect the brain following traumatic brain injury. Neural Regen Res 2016; 11:1403-1404. [PMID: 27857734 PMCID: PMC5090833 DOI: 10.4103/1673-5374.191205] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Affiliation(s)
- Lora Talley Watts
- Department of Cell Systems & Anatomy, Research Imaging Institute, Department of Neurology, University of Texas Health Science Center, San Antonio, TX, USA
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