51
|
Wood R, Durali P, Wall I. Impact of Dual Cell Co-culture and Cell-conditioned Media on Yield and Function of a Human Olfactory Cell Line for Regenerative Medicine. Bioengineering (Basel) 2020; 7:bioengineering7020037. [PMID: 32290611 PMCID: PMC7355638 DOI: 10.3390/bioengineering7020037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 04/05/2020] [Accepted: 04/10/2020] [Indexed: 02/06/2023] Open
Abstract
Olfactory ensheathing cells (OECs) are a promising candidate therapy for neuronal tissue repair. However, appropriate priming conditions to drive a regenerative phenotype are yet to be determined. We first assessed the effect of using a human fibroblast feeder layer and fibroblast conditioned media on primary rat olfactory mucosal cells (OMCs). We found that OMCs cultured on fibroblast feeders had greater expression of the key OEC marker p75NTR (25.1 ± 10.7 cells/mm2) compared with OMCs cultured on laminin (4.0 ± 0.8 cells/mm2, p = 0.001). However, the addition of fibroblast-conditioned media (CM) resulted in a significant increase in Thy1.1 (45.9 ± 9.0 cells/mm2 versus 12.5 ± 2.5 cells/mm2 on laminin, p = 0.006), an undesirable cell marker as it is regarded to be a marker of contaminating fibroblasts. A direct comparison between human feeders and GMP cell line Ms3T3 was then undertaken. Ms3T3 cells supported similar p75NTR levels (10.7 ± 5.3 cells/mm2) with significantly reduced Thy1.1 expression (4.8 ± 2.1 cells/mm2). Ms3T3 cells were used as feeder layers for human OECs to determine whether observations made in the rat model were conserved. Examination of the OEC phenotype (S100β expression and neurite outgrowth from NG108-15 cells) revealed that co-culture with fibroblast feeders had a negative effect on human OECs, contrary to observations of rat OECs. CM negatively affected rat and human OECs equally. When the best and worst conditions in terms of supporting S100β expression were used in NG108-15 neuron co-cultures, those with the highest S100β expression resulted in longer and more numerous neurites (22.8 ± 2.4 μm neurite length/neuron for laminin) compared with the lowest S100β expression (17.9 ± 1.1 μm for Ms3T3 feeders with CM). In conclusion, this work revealed that neither dual co-culture nor fibroblast-conditioned media support the regenerative OEC phenotype. In our case, a preliminary rat model was not predictive of human cell responses.
Collapse
Affiliation(s)
- Rachael Wood
- Department of Biochemical Engineering, University College London, Torrington Place, London WC1E 7JE, UK; (R.W.); (P.D.)
- School of Life & Health Sciences, Aston University, Aston Triangle, Birmingham B4 7ET, UK
| | - Pelin Durali
- Department of Biochemical Engineering, University College London, Torrington Place, London WC1E 7JE, UK; (R.W.); (P.D.)
| | - Ivan Wall
- Department of Biochemical Engineering, University College London, Torrington Place, London WC1E 7JE, UK; (R.W.); (P.D.)
- School of Life & Health Sciences, Aston University, Aston Triangle, Birmingham B4 7ET, UK
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan 31116, Korea
- Correspondence:
| |
Collapse
|
52
|
Uddin MS, Mamun AA, Jakaria M, Thangapandiyan S, Ahmad J, Rahman MA, Mathew B, Abdel-Daim MM, Aleya L. Emerging promise of sulforaphane-mediated Nrf2 signaling cascade against neurological disorders. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 707:135624. [PMID: 31784171 DOI: 10.1016/j.scitotenv.2019.135624] [Citation(s) in RCA: 97] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 11/15/2019] [Accepted: 11/17/2019] [Indexed: 06/10/2023]
Abstract
Neurological disorders represent a great challenge and are the leading cause of death and disability globally. Although numerous complicated mechanisms are involved in the progressions of chronic and acute neurodegenerative disorders, most of the diseases share mutual pathogenic features such as oxidative stress, mitochondrial dysfunction, neuroinflammation, protein misfolding, excitotoxicity, and neuronal damage, all of these are the common targets of nuclear factor erythroid 2 related factor 2 (Nrf2) signaling cascade. No cure has yet been discovered to tackle these disorders, so, intervention approaches targeting phytochemicals have been recommended as an alternative form of treatment. Sulforaphane is a sulfur-rich dietary phytochemical which has several activities such as antioxidant, anti-inflammatory, and anti-tumor via multiple targets and various mechanisms. Given its numerous actions, sulforaphane has drawn considerable attention for neurological disorders in recent years. Nrf2 is one of the most crucial targets of sulforaphane which has potential in regulating the series of cytoprotective enzyme expressions that have neuroprotective, antioxidative, and detoxification actions. Neurological disorders are auspicious candidates for Nrf2-targeted treatment strategy. Sulforaphane protects various neurological disorders by regulating the Nrf2 pathway. In this article, we recapitulate current studies of sulforaphane-mediated Nrf2 activation in the treatment of various neurological disorders.
Collapse
Affiliation(s)
- Md Sahab Uddin
- Department of Pharmacy, Southeast University, Dhaka, Bangladesh; Pharmakon Neuroscience Research Network, Dhaka, Bangladesh.
| | - Abdullah Al Mamun
- Department of Pharmacy, Southeast University, Dhaka, Bangladesh; Pharmakon Neuroscience Research Network, Dhaka, Bangladesh
| | - Md Jakaria
- The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Parkville, VIC, Australia
| | | | - Jamil Ahmad
- Department of Human Nutrition, The University of Agriculture Peshawar, Khyber Pakhtunkhwa, Pakistan
| | - Md Ataur Rahman
- Center for Neuroscience, Brain Science Institute, Korea Institute of Science and Technology, Seoul, Republic of Korea
| | - Bijo Mathew
- Division of Drug Design and Medicinal Chemistry Research Lab, Department of Pharmaceutical Chemistry, Ahalia School of Pharmacy, Palakkad, India
| | - Mohamed M Abdel-Daim
- Department of Zoology, Science College, King Saud University, Riyadh 11451, Saudi Arabia; Department of Pharmacology, Faculty of Veterinary Medicine, Suez Canal University, Ismailia 41522, Egypt
| | - Lotfi Aleya
- Chrono-Environnement Laboratory, UMR CNRS 6249, Bourgogne Franche-Comté University, Besançon, France.
| |
Collapse
|
53
|
Rajaee A, Geisen ME, Sellers AK, Stirling DP. Repeat intravital imaging of the murine spinal cord reveals degenerative and reparative responses of spinal axons in real-time following a contusive SCI. Exp Neurol 2020; 327:113258. [PMID: 32105708 DOI: 10.1016/j.expneurol.2020.113258] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 02/06/2020] [Accepted: 02/22/2020] [Indexed: 12/18/2022]
Abstract
Spinal cord injury (SCI) induces a secondary degenerative response that causes the loss of spared axons and worsens neurological outcome. The complex molecular mechanisms that mediate secondary axonal degeneration remain poorly understood. To further our understanding of secondary axonal degeneration following SCI, we assessed the spatiotemporal dynamics of axonal spheroid and terminal bulb formation following a contusive SCI in real-time in vivo. Adult 6-8 week old Thy1YFP transgenic mice underwent a T12 laminectomy for acute imaging sessions or were implanted with a custom spinal cord imaging chamber for chronic imaging of the spinal cord. Two-photon excitation time-lapse microscopy was performed prior to a mild contusion SCI (30 kilodyne, IH Impactor) and at 1-4 h and 1-14 days post-SCI. We quantified the number of axonal spheroids, their size and distribution, the number of endbulbs, and axonal survival from 1 h to 14 days post-SCI. Our data reveal that the majority of axons underwent swelling and axonal spheroid formation acutely after SCI resulting in the loss of ~70% of axons by 1 day after injury. In agreement, the number of axonal spheroids rapidly increased at 1 h after SCI and remained significantly elevated up to 14 days after SCI. Furthermore, the distribution of axonal spheroids spread mediolaterally over time indicative of delayed secondary degenerative processes. In contrast, axonal endbulbs were relatively sparse and their numbers peaked at 1 day after injury. Intriguingly, axonal survival significantly increased at 7 and 14 days compared to 3 days after SCI revealing a potential endogenous axonal repair process that mirrors the known spontaneous functional recovery after SCI. In support, ~43% of tracked axonal spheroids resolved over the course of observation revealing their dynamic nature. Furthermore, axonal spheroids and endbulbs accumulated mitochondria and excessive tubulin polyglutamylation suggestive of disrupted axonal transport as a shared mechanism. Collectively, this study provides important insight into both degenerative and recoverable responses of axons following contusive SCI in real-time. Understanding how axons spontaneously recover after SCI will be an important avenue for future SCI research and may help guide future clinical trials.
Collapse
Affiliation(s)
- Arezoo Rajaee
- Kentucky Spinal Cord Injury Research Center, University of Louisville, School of Medicine, Louisville, KY 40202, USA; Department of Neurological Surgery, University of Louisville, School of Medicine, Louisville, KY 40202, USA
| | - Mariah E Geisen
- Kentucky Spinal Cord Injury Research Center, University of Louisville, School of Medicine, Louisville, KY 40202, USA; Department of Neurological Surgery, University of Louisville, School of Medicine, Louisville, KY 40202, USA
| | - Alexandra K Sellers
- Department of Bioengineering, University of Louisville, School of Medicine, Louisville, KY 40202, USA
| | - David P Stirling
- Kentucky Spinal Cord Injury Research Center, University of Louisville, School of Medicine, Louisville, KY 40202, USA; Department of Neurological Surgery, University of Louisville, School of Medicine, Louisville, KY 40202, USA; Department of Anatomical Sciences and Neurobiology, University of Louisville, School of Medicine, Louisville, KY 40202, USA; Department of Microbiology and Immunology, University of Louisville, School of Medicine, Louisville, KY 40202, USA.
| |
Collapse
|
54
|
Ma D, Zhao Y, Huang L, Xiao Z, Chen B, Shi Y, Shen H, Dai J. A novel hydrogel-based treatment for complete transection spinal cord injury repair is driven by microglia/macrophages repopulation. Biomaterials 2020; 237:119830. [PMID: 32036301 DOI: 10.1016/j.biomaterials.2020.119830] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2019] [Revised: 12/28/2019] [Accepted: 01/25/2020] [Indexed: 12/17/2022]
Abstract
Microglia/macrophage mediated-inflammation, a main contributor to the microenvironment after spinal cord injury (SCI), persists for a long period of time and affects SCI repair. However, the effects of microglia/macrophage mediated-inflammation on neurogenic differentiation of endogenous neural stem/progenitor cells (NSPCs) are not well understood. In this study, to attenuate activated microglia/macrophage mediated-inflammation in the spinal cord of complete transection SCI mice, a combination of photo-crosslinked hydrogel transplantation and CSF1R inhibitor (PLX3397) treatment was used to replace the prolonged, activated microglia/macrophages via cell depletion and repopulation. This combined treatment in SCI mice produced a significant reduction in CD68-positive reactive microglia/macrophages and mRNA levels of pro-inflammatory factors, and a substantial increase in the number of Tuj1-positive neurons in the lesion area compared with single treatment methods. Moreover, most of the newborn Tuj1-positive neurons were confirmed to be generated from endogenous NSPCs using a genetic fate mapping mouse line (Nestin-CreERT2; LSL-tdTomato) that can label and trace NSPC marker-nestin expressing cells and their progenies. Collectively, our findings show that the combined treatment method for inhibiting microglia/macrophage mediated-inflammation promotes endogenous NSPC neurogenesis and improves functional recovery, which provides a promising therapeutic strategy for complete transection SCI.
Collapse
Affiliation(s)
- Dezun Ma
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, PR China; University of Chinese Academy of Sciences, Beijing, 100101, PR China
| | - Yannan Zhao
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, PR China
| | - Lei Huang
- Key Laboratory for Nano-Bio Interface Research, Division of Nanobiomedicine, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, PR China
| | - Zhifeng Xiao
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, PR China
| | - Bing Chen
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, PR China
| | - Ya Shi
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, PR China
| | - He Shen
- Key Laboratory for Nano-Bio Interface Research, Division of Nanobiomedicine, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, PR China.
| | - Jianwu Dai
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, PR China; University of Chinese Academy of Sciences, Beijing, 100101, PR China.
| |
Collapse
|
55
|
Maynard ME, Redell JB, Zhao J, Hood KN, Vita SM, Kobori N, Dash PK. Sarm1 loss reduces axonal damage and improves cognitive outcome after repetitive mild closed head injury. Exp Neurol 2020; 327:113207. [PMID: 31962129 DOI: 10.1016/j.expneurol.2020.113207] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 01/10/2020] [Accepted: 01/17/2020] [Indexed: 11/16/2022]
Abstract
One of the consistent pathologies associated with both clinical and experimental traumatic brain injury is axonal injury, especially following mild traumatic brain injury (or concussive injury). Several lines of experimental evidence have demonstrated a role for NAD+ metabolism in axonal degeneration. One of the enzymes that metabolizes NAD+ in axons is Sarm1 (Sterile Alpha and TIR Motif Containing 1), and its activity is thought to play a key role in axonal degeneration. Using a Sarm1 knock-out mouse, we examined if loss of Sarm1 offers axonal injury protection and improves cognitive outcome after repeated mild closed head injury (rmCHI). Our results indicate that rmCHI caused white matter damage that can be observed in the corpus callosum, cingulum bundle, alveus of the hippocampus, and fimbria of the fornix of wild-type mice. These pathological changes were markedly reduced in injured Sarm1-/- mice. Interestingly, the activation of astrocytes and microglia was also attenuated in the areas with white matter damage, suggesting reduced inflammation. Associated with these improved pathological outcomes, injured Sarm1-/- mice performed significantly better in both motor and cognitive tasks. Taken together, our results suggest that strategies aimed at inhibiting Sarm1 and/or restoring NAD+ levels in injured axons may have therapeutic utility.
Collapse
Affiliation(s)
- Mark E Maynard
- Department of Neurobiology and Anatomy, the University of Texas McGovern Medical School, Houston, TX 77225, United States of America
| | - John B Redell
- Department of Neurobiology and Anatomy, the University of Texas McGovern Medical School, Houston, TX 77225, United States of America
| | - Jing Zhao
- Department of Neurobiology and Anatomy, the University of Texas McGovern Medical School, Houston, TX 77225, United States of America
| | - Kimberly N Hood
- Department of Neurobiology and Anatomy, the University of Texas McGovern Medical School, Houston, TX 77225, United States of America
| | - Sydney M Vita
- Department of Neurobiology and Anatomy, the University of Texas McGovern Medical School, Houston, TX 77225, United States of America
| | - Nobuhide Kobori
- Department of Neurobiology and Anatomy, the University of Texas McGovern Medical School, Houston, TX 77225, United States of America
| | - Pramod K Dash
- Department of Neurobiology and Anatomy, the University of Texas McGovern Medical School, Houston, TX 77225, United States of America.
| |
Collapse
|
56
|
Kiuchi MG, Ho JK, Nolde JM, Gavidia LML, Carnagarin R, Matthews VB, Schlaich MP. Sympathetic Activation in Hypertensive Chronic Kidney Disease - A Stimulus for Cardiac Arrhythmias and Sudden Cardiac Death? Front Physiol 2020; 10:1546. [PMID: 32009970 PMCID: PMC6974800 DOI: 10.3389/fphys.2019.01546] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Accepted: 12/09/2019] [Indexed: 12/11/2022] Open
Abstract
Studies have revealed a robust and independent correlation between chronic kidney disease (CKD) and cardiovascular (CV) events, including death, heart failure, and myocardial infarction. Recent clinical trials extend this range of adverse CV events, including malignant ventricular arrhythmias and sudden cardiac death (SCD). Moreover, other studies point out that cardiac structural and electrophysiological changes are a common occurrence in this population. These processes are likely contributors to the heightened hazard of arrhythmias in CKD population and may be useful indicators to detect patients who are at a higher SCD risk. Sympathetic overactivity is associated with increased CV risk, specifically in the population with CKD, and it is a central feature of the hypertensive state, occurring early in its clinical course. Sympathetic hyperactivity is already evident at the earliest clinical stage of CKD and is directly related to the progression of renal failure, being most pronounced in those with end-stage renal disease. Sympathetic efferent and afferent neural activity in kidney failure is a crucial facilitator for the perpetuation and evolvement of the disease. Here, we will revisit the role of the feedback loop of the sympathetic neural cycle in the context of CKD and how it may aggravate several of the risk factors responsible for causing SCD. Targeting the overactive sympathetic nervous system therapeutically, either pharmacologically or with newly available device-based approaches, may prove to be a pivotal intervention to curb the substantial burden of cardiac arrhythmias and SCD in the high-risk population of patients with CKD.
Collapse
Affiliation(s)
- Márcio Galindo Kiuchi
- Dobney Hypertension Centre, School of Medicine - Royal Perth Hospital Unit/Medical Research Foundation, The University of Western Australia, Perth, WA, Australia
| | - Jan K Ho
- Dobney Hypertension Centre, School of Medicine - Royal Perth Hospital Unit/Medical Research Foundation, The University of Western Australia, Perth, WA, Australia
| | - Janis Marc Nolde
- Dobney Hypertension Centre, School of Medicine - Royal Perth Hospital Unit/Medical Research Foundation, The University of Western Australia, Perth, WA, Australia
| | - Leslie Marisol Lugo Gavidia
- Dobney Hypertension Centre, School of Medicine - Royal Perth Hospital Unit/Medical Research Foundation, The University of Western Australia, Perth, WA, Australia
| | - Revathy Carnagarin
- Dobney Hypertension Centre, School of Medicine - Royal Perth Hospital Unit/Medical Research Foundation, The University of Western Australia, Perth, WA, Australia
| | - Vance B Matthews
- Dobney Hypertension Centre, School of Medicine - Royal Perth Hospital Unit/Medical Research Foundation, The University of Western Australia, Perth, WA, Australia
| | - Markus P Schlaich
- Dobney Hypertension Centre, School of Medicine - Royal Perth Hospital Unit/Medical Research Foundation, The University of Western Australia, Perth, WA, Australia.,Departments of Cardiology and Nephrology, Royal Perth Hospital, Perth, WA, Australia.,Neurovascular Hypertension & Kidney Disease Laboratory, Baker Heart and Diabetes Institute, Melbourne, VIC, Australia
| |
Collapse
|
57
|
Duncan KA. Estrogen Formation and Inactivation Following TBI: What we Know and Where we Could go. Front Endocrinol (Lausanne) 2020; 11:345. [PMID: 32547495 PMCID: PMC7272601 DOI: 10.3389/fendo.2020.00345] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Accepted: 05/04/2020] [Indexed: 01/27/2023] Open
Abstract
Traumatic brain injury (TBI) is responsible for various neuronal and cognitive deficits as well as psychosocial dysfunction. Characterized by damage inducing neuroinflammation, this response can cause an acute secondary injury that leads to widespread neurodegeneration and loss of neurological function. Estrogens decrease injury induced neuroinflammation and increase cell survival and neuroprotection and thus are a potential target for use following TBI. While much is known about the role of estrogens as a neuroprotective agent following TBI, less is known regarding their formation and inactivation following damage to the brain. Specifically, very little is known surrounding the majority of enzymes responsible for the production of estrogens. These estrogen metabolizing enzymes (EME) include aromatase, steroid sulfatase (STS), estrogen sulfotransferase (EST/SULT1E1), and some forms of 17β-hydroxysteroid dehydrogenase (HSD17B) and are involved in both the initial conversion and interconversion of estrogens from precursors. This article will review and offer new prospective and ideas on the expression of EMEs following TBI.
Collapse
|
58
|
Duncan KA, Saldanha CJ. Central aromatization: A dramatic and responsive defense against threat and trauma to the vertebrate brain. Front Neuroendocrinol 2020; 56:100816. [PMID: 31786088 PMCID: PMC9366903 DOI: 10.1016/j.yfrne.2019.100816] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Revised: 11/15/2019] [Accepted: 11/19/2019] [Indexed: 01/09/2023]
Abstract
Aromatase is the requisite and limiting enzyme in the production of estrogens from androgens. Estrogens synthesized centrally have more recently emerged as potent neuroprotectants in the vertebrate brain. Studies in rodents and songbirds have identified key mechanisms that underlie both; the injury-dependent induction of central aromatization, and the protective effects of centrally synthesized estrogens. Injury-induced aromatase expression in astrocytes occurs following a broad range of traumatic brain damage including excitotoxic, penetrating, and concussive injury. Responses to neural insult such as edema and inflammation involve signaling pathways the components of which are excellent candidates as inducers of this astrocytic response. Finally, estradiol from astrocytes exerts a paracrine neuroprotective influence via the potent inhibition of inflammatory pathways. Taken together, these data suggest a novel role for neural aromatization as a protective mechanism against the threat of inflammation and suggests that central estrogen provision is a wide-ranging neuroprotectant in the vertebrate brain.
Collapse
Affiliation(s)
- Kelli A Duncan
- Department of Biology, Vassar College, Poughkeepsie, NY 12604, United States.
| | - Colin J Saldanha
- Department of Biology and Center for Behavioral Neuroscience, American University, Washington, DC 20016, United States.
| |
Collapse
|
59
|
Iboaya A, Harris JL, Arickx AN, Nudo RJ. Models of Traumatic Brain Injury in Aged Animals: A Clinical Perspective. Neurorehabil Neural Repair 2019; 33:975-988. [PMID: 31722616 PMCID: PMC6920554 DOI: 10.1177/1545968319883879] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Traumatic brain injury (TBI) is a major cause of morbidity and mortality in the United States, with advanced age being one of the major predictors of poor prognosis. To replicate the mechanisms and multifaceted complexities of human TBI and develop prospective therapeutic treatments, various TBI animal models have been developed. These models have been essential in furthering our understanding of the pathophysiology and biochemical effects on brain mechanisms following TBI. Despite these advances, translating preclinical results to clinical application, particularly in elderly individuals, continues to be challenging. This review aims to provide a clinical perspective, identifying relevant variables currently not replicated in TBI animal models, to potentially improve translation to clinical practice, especially as it applies to elderly populations. As background for this clinical perspective, we reviewed articles indexed on PubMed from 1970 to 2019 that used aged animal models for studying TBI. These studies examined end points relevant for clinical translation, such as neurocognitive effects, sensorimotor behavior, physiological mechanisms, and efficacy of neuroprotective therapies. However, compared with the higher incidence of TBI in older individuals, animal studies on the basic science of aging and TBI remain remarkably scarce. Moreover, a fundamental disconnect remains between experiments in animal models of TBI and successful translation of findings for treating the older TBI population. In this article, we aim to provide a clinical perspective on the unique attributes of TBI in older individuals and a critical appraisal of the research to date on TBI in aged animal models as well as recommendations for future studies.
Collapse
Affiliation(s)
- Aiwane Iboaya
- University of Kansas Medical Center, Kansas City, KS, USA
| | - Janna L Harris
- University of Kansas Medical Center, Kansas City, KS, USA
| | | | | |
Collapse
|
60
|
Robicsek SA, Bhattacharya A, Rabai F, Shukla K, Doré S. Blood-Related Toxicity after Traumatic Brain Injury: Potential Targets for Neuroprotection. Mol Neurobiol 2019; 57:159-178. [PMID: 31617072 DOI: 10.1007/s12035-019-01766-8] [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: 08/29/2019] [Accepted: 08/29/2019] [Indexed: 02/07/2023]
Abstract
Emergency visits, hospitalizations, and deaths due to traumatic brain injury (TBI) have increased significantly over the past few decades. While the primary early brain trauma is highly deleterious to the brain, the secondary injury post-TBI is postulated to significantly impact mortality. The presence of blood, particularly hemoglobin, and its breakdown products and key binding proteins and receptors modulating their clearance may contribute significantly to toxicity. Heme, hemin, and iron, for example, cause membrane lipid peroxidation, generate reactive oxygen species, and sensitize cells to noxious stimuli resulting in edema, cell death, and increased morbidity and mortality. A wide range of other mechanisms such as the immune system play pivotal roles in mediating secondary injury. Effective scavenging of all of these pro-oxidant and pro-inflammatory metabolites as well as controlling maladaptive immune responses is essential for limiting toxicity and secondary injury. Hemoglobin metabolism is mediated by key molecules such as haptoglobin, heme oxygenase, hemopexin, and ferritin. Genetic variability and dysfunction affecting these pathways (e.g., haptoglobin and heme oxygenase expression) have been implicated in the difference in susceptibility of individual patients to toxicity and may be target pathways for potential therapeutic interventions in TBI. Ongoing collaborative efforts are required to decipher the complexities of blood-related toxicity in TBI with an overarching goal of providing effective treatment options to all patients with TBI.
Collapse
Affiliation(s)
- Steven A Robicsek
- Department of Anesthesiology, Center for Translational Research in Neurodegenerative Disease and McKnight Brain Institute, College of Medicine, University of Florida, 1275 Center Drive, Biomed Sci J493, Gainesville, FL, 32610, USA. .,Departments of Neurosurgery, Neuroscience, College of Medicine, University of Florida, Gainesville, FL, USA.
| | - Ayon Bhattacharya
- Department of Anesthesiology, Center for Translational Research in Neurodegenerative Disease and McKnight Brain Institute, College of Medicine, University of Florida, 1275 Center Drive, Biomed Sci J493, Gainesville, FL, 32610, USA.,Department of Pharmacology, KPC Medical College, West Bengal University of Health Sciences, Kolkata, West Bengal, India
| | - Ferenc Rabai
- Department of Anesthesiology, Center for Translational Research in Neurodegenerative Disease and McKnight Brain Institute, College of Medicine, University of Florida, 1275 Center Drive, Biomed Sci J493, Gainesville, FL, 32610, USA
| | - Krunal Shukla
- Department of Anesthesiology, Center for Translational Research in Neurodegenerative Disease and McKnight Brain Institute, College of Medicine, University of Florida, 1275 Center Drive, Biomed Sci J493, Gainesville, FL, 32610, USA
| | - Sylvain Doré
- Department of Anesthesiology, Center for Translational Research in Neurodegenerative Disease and McKnight Brain Institute, College of Medicine, University of Florida, 1275 Center Drive, Biomed Sci J493, Gainesville, FL, 32610, USA. .,Departments of Neurology, Psychiatry, Pharmaceutics and Neuroscience, College of Medicine, University of Florida, Gainesville, FL, USA.
| |
Collapse
|
61
|
Arai M, Imamura O, Kondoh N, Dateki M, Takishima K. Neuronal Ca2+‐dependent activator protein 1 (NCDAP1) induces neuronal cell death by activating p53 pathway following traumatic brain injury. J Neurochem 2019; 151:795-809. [DOI: 10.1111/jnc.14803] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 06/15/2019] [Accepted: 06/18/2019] [Indexed: 11/28/2022]
Affiliation(s)
- Masaaki Arai
- Department of Biochemistry National Defense Medical College Tokorozawa Japan
| | - Osamu Imamura
- Department of Biochemistry National Defense Medical College Tokorozawa Japan
| | - Nobuo Kondoh
- Department of Oral Biochemistry Asahi University School of Dentistry Mizuho Japan
| | - Minori Dateki
- Department of Biochemistry National Defense Medical College Tokorozawa Japan
| | - Kunio Takishima
- Department of Biochemistry National Defense Medical College Tokorozawa Japan
| |
Collapse
|
62
|
Wu J, Lipinski MM. Autophagy in Neurotrauma: Good, Bad, or Dysregulated. Cells 2019; 8:E693. [PMID: 31295858 PMCID: PMC6678153 DOI: 10.3390/cells8070693] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 07/06/2019] [Accepted: 07/09/2019] [Indexed: 12/12/2022] Open
Abstract
Autophagy is a physiological process that helps maintain a balance between the manufacture of cellular components and breakdown of damaged organelles and other toxic cellular constituents. Changes in autophagic markers are readily detectable in the spinal cord and brain following neurotrauma, including traumatic spinal cord and brain injury (SCI/TBI). However, the role of autophagy in neurotrauma remains less clear. Whether autophagy is good or bad is under debate, with strong support for both a beneficial and detrimental role for autophagy in experimental models of neurotrauma. Emerging data suggest that autophagic flux, a measure of autophagic degradation activity, is impaired in injured central nervous systems (CNS), and interventions that stimulate autophagic flux may provide neuroprotection in SCI/TBI models. Recent data demonstrating that neurotrauma can cause lysosomal membrane damage resulting in pathological autophagosome accumulation in the spinal cord and brain further supports the idea that the impairment of the autophagy-lysosome pathway may be a part of secondary injury processes of SCI/TBI. Here, we review experimental work on the complex and varied responses of autophagy in terms of both the beneficial and detrimental effects in SCI and TBI models. We also discuss the existing and developing therapeutic options aimed at reducing the disruption of autophagy to protect the CNS after injuries.
Collapse
Affiliation(s)
- Junfang Wu
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD 21201, USA.
- Department of Anatomy and Neurobiology, University of Maryland School of Medicine, Baltimore, MD 21201, USA.
- Center to Advance Chronic Pain Research, University of Maryland, Baltimore, MD 21201, USA.
| | - Marta M Lipinski
- Department of Anesthesiology and Center for Shock, Trauma and Anesthesiology Research (STAR), University of Maryland School of Medicine, Baltimore, MD 21201, USA
- Department of Anatomy and Neurobiology, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| |
Collapse
|
63
|
Kawoos U, Abutarboush R, Zarriello S, Qadri A, Ahlers ST, McCarron RM, Chavko M. N-acetylcysteine Amide Ameliorates Blast-Induced Changes in Blood-Brain Barrier Integrity in Rats. Front Neurol 2019; 10:650. [PMID: 31297080 PMCID: PMC6607624 DOI: 10.3389/fneur.2019.00650] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Accepted: 06/04/2019] [Indexed: 12/31/2022] Open
Abstract
Traumatic brain injury resulting from exposure to blast overpressure (BOP) is associated with neuropathology including impairment of the blood-brain barrier (BBB). This study examined the effects of repeated exposure to primary BOP and post-blast treatment with an antioxidant, N-acetylcysteine amide (NACA) on the integrity of BBB. Anesthetized rats were exposed to three 110 kPa BOPs separated by 0.5 h. BBB integrity was examined in vivo via a cranial window allowing imaging of pial microcirculation by intravital microscopy. Tetramethylrhodamine isothiocyanate Dextran (TRITC-Dextran, mw = 40 kDa or 150 kDa) was injected intravenously 2.5 h after the first BOP exposure and the leakage of TRITC-Dextran from pial microvessels into the brain parenchyma was assessed. The animals were randomized into 6 groups (n = 5/group): four groups received 40 kDa TRITC-Dextran (BOP-40, sham-40, BOP-40 NACA, and sham-40 NACA), and two groups received 150 kDa TRITC-Dextran (BOP-150 and sham-150). NACA treated groups were administered NACA 2 h after the first BOP exposure. The rate of TRITC-Dextran leakage was significantly higher in BOP-40 than in sham-40 group. NACA treatment significantly reduced TRITC-Dextran leakage in BOP-40 NACA group and sham-40 NACA group presented the least amount of leakage. The rate of leakage in BOP-150 and sham-150 groups was comparable to sham-40 NACA and thus these groups were not assessed for the effects of NACA. Collectively, these data suggest that BBB integrity is compromised following BOP exposure and that NACA treatment at a single dose may significantly protect against blast-induced BBB breakdown.
Collapse
Affiliation(s)
- Usmah Kawoos
- The Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, MD, United States.,Department of Neurotrauma, Naval Medical Research Center, Silver Spring, MD, United States
| | - Rania Abutarboush
- The Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, MD, United States.,Department of Neurotrauma, Naval Medical Research Center, Silver Spring, MD, United States
| | - Sydney Zarriello
- Morsani College of Medicine, University of South Florida, Tampa, FL, United States
| | - Aasheen Qadri
- Department of Biology, University of Maryland, College Park, MD, United States
| | - Stephen T Ahlers
- Department of Neurotrauma, Naval Medical Research Center, Silver Spring, MD, United States.,Department of Surgery, Uniformed Services University of the Health Sciences, Bethesda, MD, United States
| | - Richard M McCarron
- Department of Neurotrauma, Naval Medical Research Center, Silver Spring, MD, United States.,Department of Surgery, Uniformed Services University of the Health Sciences, Bethesda, MD, United States
| | - Mikulas Chavko
- The Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, MD, United States.,Department of Neurotrauma, Naval Medical Research Center, Silver Spring, MD, United States
| |
Collapse
|
64
|
Watzlawick R, Antonic A, Sena ES, Kopp MA, Rind J, Dirnagl U, Macleod M, Howells DW, Schwab JM. Outcome heterogeneity and bias in acute experimental spinal cord injury: A meta-analysis. Neurology 2019; 93:e40-e51. [PMID: 31175207 DOI: 10.1212/wnl.0000000000007718] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Accepted: 02/11/2019] [Indexed: 01/18/2023] Open
Abstract
OBJECTIVE To determine whether and to what degree bias and underestimated variability undermine the predictive value of preclinical research for clinical translation. METHODS We investigated experimental spinal cord injury (SCI) studies for outcome heterogeneity and the impact of bias. Data from 549 preclinical SCI studies including 9,535 animals were analyzed with meta-regression to assess the effect of various study characteristics and the quality of neurologic recovery. RESULTS Overall, the included interventions reported a neurobehavioral outcome improvement of 26.3% (95% confidence interval 24.3-28.4). Response to treatment was dependent on experimental modeling paradigms (neurobehavioral score, site of injury, and animal species). Applying multiple outcome measures was consistently associated with smaller effect sizes compared with studies applying only 1 outcome measure. More than half of the studies (51.2%) did not report blinded assessment, constituting a likely source of evaluation bias, with an overstated effect size of 7.2%. Assessment of publication bias, which extrapolates to identify likely missing data, suggested that between 2% and 41% of experiments remain unpublished. Inclusion of these theoretical missing studies suggested an overestimation of efficacy, reducing the effect sizes by between 0.9% and 14.3%. CONCLUSIONS We provide empirical evidence of prevalent bias in the design and reporting of experimental SCI studies, resulting in overestimation of the effectiveness. Bias compromises the internal validity and jeopardizes the successful translation of SCI therapies from the bench to bedside.
Collapse
Affiliation(s)
- Ralf Watzlawick
- From Charité-Universitätsmedizin Berlin (R.W., M.A.K., J.R., U.D., J.M.S.), corporate member of the Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health; Department of Neurology and Experimental Neurology (R.W., M.A.K., J.R., J.M.S.), Charité Campus Mitte, Clinical and Experimental Spinal Cord Injury Research Laboratory (Neuroparaplegiology), Charité-Universitätsmedizin Berlin; Department of Neurosurgery (R.W.), Freiburg University Medical Center, Germany; Department of Neuroscience (A.A.), Central Clinical School, Monash University, Melbourne; Stroke Division (E.S.S., M.M., D.W.H.), Melbourne, Victoria, Australia; Departments of Neurology and Clinical Neurosciences (E.S.S., M.M.), University of Edinburgh, UK; Center for Stroke Research Berlin (U.D.) and Excellence Cluster Neurocure (U.D.), Charité-Universitätsmedizin, Berlin, Germany; German Center for Neurodegenerative Diseases (U.D.), Bonn; Berlin Institute of Health (M.A.K., U.D.), Germany; University of Tasmania (D.W.H.), School of Medicine, Faculty of Health, Medical Sciences Precinct, Hobart, Australia; Department of Neurology (J.M.S.), Spinal Cord Injury Medicine (Paraplegiology), and Belford Center for Spinal Cord Injury (J.M.S.), Departments of Neuroscience and Physical Medicine and Rehabilitation, The Neurological Institute, The Ohio State University, Wexner Medical Center, Columbus
| | - Ana Antonic
- From Charité-Universitätsmedizin Berlin (R.W., M.A.K., J.R., U.D., J.M.S.), corporate member of the Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health; Department of Neurology and Experimental Neurology (R.W., M.A.K., J.R., J.M.S.), Charité Campus Mitte, Clinical and Experimental Spinal Cord Injury Research Laboratory (Neuroparaplegiology), Charité-Universitätsmedizin Berlin; Department of Neurosurgery (R.W.), Freiburg University Medical Center, Germany; Department of Neuroscience (A.A.), Central Clinical School, Monash University, Melbourne; Stroke Division (E.S.S., M.M., D.W.H.), Melbourne, Victoria, Australia; Departments of Neurology and Clinical Neurosciences (E.S.S., M.M.), University of Edinburgh, UK; Center for Stroke Research Berlin (U.D.) and Excellence Cluster Neurocure (U.D.), Charité-Universitätsmedizin, Berlin, Germany; German Center for Neurodegenerative Diseases (U.D.), Bonn; Berlin Institute of Health (M.A.K., U.D.), Germany; University of Tasmania (D.W.H.), School of Medicine, Faculty of Health, Medical Sciences Precinct, Hobart, Australia; Department of Neurology (J.M.S.), Spinal Cord Injury Medicine (Paraplegiology), and Belford Center for Spinal Cord Injury (J.M.S.), Departments of Neuroscience and Physical Medicine and Rehabilitation, The Neurological Institute, The Ohio State University, Wexner Medical Center, Columbus
| | - Emily S Sena
- From Charité-Universitätsmedizin Berlin (R.W., M.A.K., J.R., U.D., J.M.S.), corporate member of the Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health; Department of Neurology and Experimental Neurology (R.W., M.A.K., J.R., J.M.S.), Charité Campus Mitte, Clinical and Experimental Spinal Cord Injury Research Laboratory (Neuroparaplegiology), Charité-Universitätsmedizin Berlin; Department of Neurosurgery (R.W.), Freiburg University Medical Center, Germany; Department of Neuroscience (A.A.), Central Clinical School, Monash University, Melbourne; Stroke Division (E.S.S., M.M., D.W.H.), Melbourne, Victoria, Australia; Departments of Neurology and Clinical Neurosciences (E.S.S., M.M.), University of Edinburgh, UK; Center for Stroke Research Berlin (U.D.) and Excellence Cluster Neurocure (U.D.), Charité-Universitätsmedizin, Berlin, Germany; German Center for Neurodegenerative Diseases (U.D.), Bonn; Berlin Institute of Health (M.A.K., U.D.), Germany; University of Tasmania (D.W.H.), School of Medicine, Faculty of Health, Medical Sciences Precinct, Hobart, Australia; Department of Neurology (J.M.S.), Spinal Cord Injury Medicine (Paraplegiology), and Belford Center for Spinal Cord Injury (J.M.S.), Departments of Neuroscience and Physical Medicine and Rehabilitation, The Neurological Institute, The Ohio State University, Wexner Medical Center, Columbus
| | - Marcel A Kopp
- From Charité-Universitätsmedizin Berlin (R.W., M.A.K., J.R., U.D., J.M.S.), corporate member of the Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health; Department of Neurology and Experimental Neurology (R.W., M.A.K., J.R., J.M.S.), Charité Campus Mitte, Clinical and Experimental Spinal Cord Injury Research Laboratory (Neuroparaplegiology), Charité-Universitätsmedizin Berlin; Department of Neurosurgery (R.W.), Freiburg University Medical Center, Germany; Department of Neuroscience (A.A.), Central Clinical School, Monash University, Melbourne; Stroke Division (E.S.S., M.M., D.W.H.), Melbourne, Victoria, Australia; Departments of Neurology and Clinical Neurosciences (E.S.S., M.M.), University of Edinburgh, UK; Center for Stroke Research Berlin (U.D.) and Excellence Cluster Neurocure (U.D.), Charité-Universitätsmedizin, Berlin, Germany; German Center for Neurodegenerative Diseases (U.D.), Bonn; Berlin Institute of Health (M.A.K., U.D.), Germany; University of Tasmania (D.W.H.), School of Medicine, Faculty of Health, Medical Sciences Precinct, Hobart, Australia; Department of Neurology (J.M.S.), Spinal Cord Injury Medicine (Paraplegiology), and Belford Center for Spinal Cord Injury (J.M.S.), Departments of Neuroscience and Physical Medicine and Rehabilitation, The Neurological Institute, The Ohio State University, Wexner Medical Center, Columbus
| | - Julian Rind
- From Charité-Universitätsmedizin Berlin (R.W., M.A.K., J.R., U.D., J.M.S.), corporate member of the Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health; Department of Neurology and Experimental Neurology (R.W., M.A.K., J.R., J.M.S.), Charité Campus Mitte, Clinical and Experimental Spinal Cord Injury Research Laboratory (Neuroparaplegiology), Charité-Universitätsmedizin Berlin; Department of Neurosurgery (R.W.), Freiburg University Medical Center, Germany; Department of Neuroscience (A.A.), Central Clinical School, Monash University, Melbourne; Stroke Division (E.S.S., M.M., D.W.H.), Melbourne, Victoria, Australia; Departments of Neurology and Clinical Neurosciences (E.S.S., M.M.), University of Edinburgh, UK; Center for Stroke Research Berlin (U.D.) and Excellence Cluster Neurocure (U.D.), Charité-Universitätsmedizin, Berlin, Germany; German Center for Neurodegenerative Diseases (U.D.), Bonn; Berlin Institute of Health (M.A.K., U.D.), Germany; University of Tasmania (D.W.H.), School of Medicine, Faculty of Health, Medical Sciences Precinct, Hobart, Australia; Department of Neurology (J.M.S.), Spinal Cord Injury Medicine (Paraplegiology), and Belford Center for Spinal Cord Injury (J.M.S.), Departments of Neuroscience and Physical Medicine and Rehabilitation, The Neurological Institute, The Ohio State University, Wexner Medical Center, Columbus
| | - Ulrich Dirnagl
- From Charité-Universitätsmedizin Berlin (R.W., M.A.K., J.R., U.D., J.M.S.), corporate member of the Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health; Department of Neurology and Experimental Neurology (R.W., M.A.K., J.R., J.M.S.), Charité Campus Mitte, Clinical and Experimental Spinal Cord Injury Research Laboratory (Neuroparaplegiology), Charité-Universitätsmedizin Berlin; Department of Neurosurgery (R.W.), Freiburg University Medical Center, Germany; Department of Neuroscience (A.A.), Central Clinical School, Monash University, Melbourne; Stroke Division (E.S.S., M.M., D.W.H.), Melbourne, Victoria, Australia; Departments of Neurology and Clinical Neurosciences (E.S.S., M.M.), University of Edinburgh, UK; Center for Stroke Research Berlin (U.D.) and Excellence Cluster Neurocure (U.D.), Charité-Universitätsmedizin, Berlin, Germany; German Center for Neurodegenerative Diseases (U.D.), Bonn; Berlin Institute of Health (M.A.K., U.D.), Germany; University of Tasmania (D.W.H.), School of Medicine, Faculty of Health, Medical Sciences Precinct, Hobart, Australia; Department of Neurology (J.M.S.), Spinal Cord Injury Medicine (Paraplegiology), and Belford Center for Spinal Cord Injury (J.M.S.), Departments of Neuroscience and Physical Medicine and Rehabilitation, The Neurological Institute, The Ohio State University, Wexner Medical Center, Columbus
| | - Malcolm Macleod
- From Charité-Universitätsmedizin Berlin (R.W., M.A.K., J.R., U.D., J.M.S.), corporate member of the Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health; Department of Neurology and Experimental Neurology (R.W., M.A.K., J.R., J.M.S.), Charité Campus Mitte, Clinical and Experimental Spinal Cord Injury Research Laboratory (Neuroparaplegiology), Charité-Universitätsmedizin Berlin; Department of Neurosurgery (R.W.), Freiburg University Medical Center, Germany; Department of Neuroscience (A.A.), Central Clinical School, Monash University, Melbourne; Stroke Division (E.S.S., M.M., D.W.H.), Melbourne, Victoria, Australia; Departments of Neurology and Clinical Neurosciences (E.S.S., M.M.), University of Edinburgh, UK; Center for Stroke Research Berlin (U.D.) and Excellence Cluster Neurocure (U.D.), Charité-Universitätsmedizin, Berlin, Germany; German Center for Neurodegenerative Diseases (U.D.), Bonn; Berlin Institute of Health (M.A.K., U.D.), Germany; University of Tasmania (D.W.H.), School of Medicine, Faculty of Health, Medical Sciences Precinct, Hobart, Australia; Department of Neurology (J.M.S.), Spinal Cord Injury Medicine (Paraplegiology), and Belford Center for Spinal Cord Injury (J.M.S.), Departments of Neuroscience and Physical Medicine and Rehabilitation, The Neurological Institute, The Ohio State University, Wexner Medical Center, Columbus
| | - David W Howells
- From Charité-Universitätsmedizin Berlin (R.W., M.A.K., J.R., U.D., J.M.S.), corporate member of the Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health; Department of Neurology and Experimental Neurology (R.W., M.A.K., J.R., J.M.S.), Charité Campus Mitte, Clinical and Experimental Spinal Cord Injury Research Laboratory (Neuroparaplegiology), Charité-Universitätsmedizin Berlin; Department of Neurosurgery (R.W.), Freiburg University Medical Center, Germany; Department of Neuroscience (A.A.), Central Clinical School, Monash University, Melbourne; Stroke Division (E.S.S., M.M., D.W.H.), Melbourne, Victoria, Australia; Departments of Neurology and Clinical Neurosciences (E.S.S., M.M.), University of Edinburgh, UK; Center for Stroke Research Berlin (U.D.) and Excellence Cluster Neurocure (U.D.), Charité-Universitätsmedizin, Berlin, Germany; German Center for Neurodegenerative Diseases (U.D.), Bonn; Berlin Institute of Health (M.A.K., U.D.), Germany; University of Tasmania (D.W.H.), School of Medicine, Faculty of Health, Medical Sciences Precinct, Hobart, Australia; Department of Neurology (J.M.S.), Spinal Cord Injury Medicine (Paraplegiology), and Belford Center for Spinal Cord Injury (J.M.S.), Departments of Neuroscience and Physical Medicine and Rehabilitation, The Neurological Institute, The Ohio State University, Wexner Medical Center, Columbus
| | - Jan M Schwab
- From Charité-Universitätsmedizin Berlin (R.W., M.A.K., J.R., U.D., J.M.S.), corporate member of the Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health; Department of Neurology and Experimental Neurology (R.W., M.A.K., J.R., J.M.S.), Charité Campus Mitte, Clinical and Experimental Spinal Cord Injury Research Laboratory (Neuroparaplegiology), Charité-Universitätsmedizin Berlin; Department of Neurosurgery (R.W.), Freiburg University Medical Center, Germany; Department of Neuroscience (A.A.), Central Clinical School, Monash University, Melbourne; Stroke Division (E.S.S., M.M., D.W.H.), Melbourne, Victoria, Australia; Departments of Neurology and Clinical Neurosciences (E.S.S., M.M.), University of Edinburgh, UK; Center for Stroke Research Berlin (U.D.) and Excellence Cluster Neurocure (U.D.), Charité-Universitätsmedizin, Berlin, Germany; German Center for Neurodegenerative Diseases (U.D.), Bonn; Berlin Institute of Health (M.A.K., U.D.), Germany; University of Tasmania (D.W.H.), School of Medicine, Faculty of Health, Medical Sciences Precinct, Hobart, Australia; Department of Neurology (J.M.S.), Spinal Cord Injury Medicine (Paraplegiology), and Belford Center for Spinal Cord Injury (J.M.S.), Departments of Neuroscience and Physical Medicine and Rehabilitation, The Neurological Institute, The Ohio State University, Wexner Medical Center, Columbus.
| |
Collapse
|
65
|
Kiuchi MG, Esler MD, Fink GD, Osborn JW, Banek CT, Böhm M, Denton KM, DiBona GF, Everett TH, Grassi G, Katholi RE, Knuepfer MM, Kopp UC, Lefer DJ, Lohmeier TE, May CN, Mahfoud F, Paton JF, Schmieder RE, Pellegrino PR, Sharabi Y, Schlaich MP. Renal Denervation Update From the International Sympathetic Nervous System Summit. J Am Coll Cardiol 2019; 73:3006-3017. [DOI: 10.1016/j.jacc.2019.04.015] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Revised: 04/10/2019] [Accepted: 04/15/2019] [Indexed: 12/14/2022]
|
66
|
The Progression of Memory Loss Secondary to TBI-Induced White Matter Attenuation: a Review of the Literature and Case Exemplar. JOURNAL OF PEDIATRIC NEUROPSYCHOLOGY 2019. [DOI: 10.1007/s40817-018-0050-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
67
|
Kiuchi MG, Nolde JM, Villacorta H, Carnagarin R, Chan JJSY, Lugo-Gavidia LM, Ho JK, Matthews VB, Dwivedi G, Schlaich MP. New Approaches in the Management of Sudden Cardiac Death in Patients with Heart Failure-Targeting the Sympathetic Nervous System. Int J Mol Sci 2019; 20:E2430. [PMID: 31100908 PMCID: PMC6567277 DOI: 10.3390/ijms20102430] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Revised: 05/10/2019] [Accepted: 05/12/2019] [Indexed: 12/11/2022] Open
Abstract
Cardiovascular diseases (CVDs) have been considered the most predominant cause of death and one of the most critical public health issues worldwide. In the past two decades, cardiovascular (CV) mortality has declined in high-income countries owing to preventive measures that resulted in the reduced burden of coronary artery disease (CAD) and heart failure (HF). In spite of these promising results, CVDs are responsible for ~17 million deaths per year globally with ~25% of these attributable to sudden cardiac death (SCD). Pre-clinical data demonstrated that renal denervation (RDN) decreases sympathetic activation as evaluated by decreased renal catecholamine concentrations. RDN is successful in reducing ventricular arrhythmias (VAs) triggering and its outcome was not found inferior to metoprolol in rat myocardial infarction model. Registry clinical data also suggest an advantageous effect of RDN to prevent VAs in HF patients and electrical storm. An in-depth investigation of how RDN, a minimally invasive and safe method, reduces the burden of HF is urgently needed. Myocardial systolic dysfunction is correlated to neuro-hormonal overactivity as a compensatory mechanism to keep cardiac output in the face of declining cardiac function. Sympathetic nervous system (SNS) overactivity is supported by a rise in plasma noradrenaline (NA) and adrenaline levels, raised central sympathetic outflow, and increased organ-specific spillover of NA into plasma. Cardiac NA spillover in untreated HF individuals can reach ~50-fold higher levels compared to those of healthy individuals under maximal exercise conditions. Increased sympathetic outflow to the renal vascular bed can contribute to the anomalies of renal function commonly associated with HF and feed into a vicious cycle of elevated BP, the progression of renal disease and worsening HF. Increased sympathetic activity, amongst other factors, contribute to the progress of cardiac arrhythmias, which can lead to SCD due to sustained ventricular tachycardia. Targeted therapies to avoid these detrimental consequences comprise antiarrhythmic drugs, surgical resection, endocardial catheter ablation and use of the implantable electronic cardiac devices. Analogous NA agents have been reported for single photon-emission-computed-tomography (SPECT) scans usage, specially the 123I-metaiodobenzylguanidine (123I-MIBG). Currently, HF prognosis assessment has been improved by this tool. Nevertheless, this radiotracer is costly, which makes the use of this diagnostic method limited. Comparatively, positron-emission-tomography (PET) overshadows SPECT imaging, because of its increased spatial definition and broader reckonable methodologies. Numerous ANS radiotracers have been created for cardiac PET imaging. However, so far, [11C]-meta-hydroxyephedrine (HED) has been the most significant PET radiotracer used in the clinical scenario. Growing data has shown the usefulness of [11C]-HED in important clinical situations, such as predicting lethal arrhythmias, SCD, and all-cause of mortality in reduced ejection fraction HF patients. In this article, we discussed the role and relevance of novel tools targeting the SNS, such as the [11C]-HED PET cardiac imaging and RDN to manage patients under of SCD risk.
Collapse
Affiliation(s)
- Márcio Galindo Kiuchi
- Dobney Hypertension Cenre, School of Medicine-Royal Perth Hospital Unit, Faculty of Medicine, Dentistry & Health Sciences, The University of Western Australia Level 3, MRF Building, Rear 50 Murray St, Perth 6000, MDBP: M570, Australia.
| | - Janis Marc Nolde
- Dobney Hypertension Cenre, School of Medicine-Royal Perth Hospital Unit, Faculty of Medicine, Dentistry & Health Sciences, The University of Western Australia Level 3, MRF Building, Rear 50 Murray St, Perth 6000, MDBP: M570, Australia.
| | - Humberto Villacorta
- Cardiology Division, Department of Medicine, Universidade Federal Fluminense, Niterói, Rio de Janeiro 24033-900, Brazil.
| | - Revathy Carnagarin
- Dobney Hypertension Cenre, School of Medicine-Royal Perth Hospital Unit, Faculty of Medicine, Dentistry & Health Sciences, The University of Western Australia Level 3, MRF Building, Rear 50 Murray St, Perth 6000, MDBP: M570, Australia.
| | - Justine Joy Su-Yin Chan
- Dobney Hypertension Cenre, School of Medicine-Royal Perth Hospital Unit, Faculty of Medicine, Dentistry & Health Sciences, The University of Western Australia Level 3, MRF Building, Rear 50 Murray St, Perth 6000, MDBP: M570, Australia.
| | - Leslie Marisol Lugo-Gavidia
- Dobney Hypertension Cenre, School of Medicine-Royal Perth Hospital Unit, Faculty of Medicine, Dentistry & Health Sciences, The University of Western Australia Level 3, MRF Building, Rear 50 Murray St, Perth 6000, MDBP: M570, Australia.
| | - Jan K Ho
- Dobney Hypertension Cenre, School of Medicine-Royal Perth Hospital Unit, Faculty of Medicine, Dentistry & Health Sciences, The University of Western Australia Level 3, MRF Building, Rear 50 Murray St, Perth 6000, MDBP: M570, Australia.
| | - Vance B Matthews
- Dobney Hypertension Cenre, School of Medicine-Royal Perth Hospital Unit, Faculty of Medicine, Dentistry & Health Sciences, The University of Western Australia Level 3, MRF Building, Rear 50 Murray St, Perth 6000, MDBP: M570, Australia.
| | - Girish Dwivedi
- Harry Perkins Institute of Medical Research and Fiona Stanley Hospital, The University of Western Australia, Perth 6150, Australia.
| | - Markus P Schlaich
- Dobney Hypertension Cenre, School of Medicine-Royal Perth Hospital Unit, Faculty of Medicine, Dentistry & Health Sciences, The University of Western Australia Level 3, MRF Building, Rear 50 Murray St, Perth 6000, MDBP: M570, Australia.
- Departments of Cardiology and Nephrology, Royal Perth Hospital, Perth 6000, Australia.
- Neurovascular Hypertension & Kidney Disease Laboratory, Baker Heart and Diabetes Institute, Melbourne 3004, Australia.
| |
Collapse
|
68
|
Prado C, Fratini P, de Sá Schiavo Matias G, Bocabello RZ, Monteiro J, Dos Santos CJ, Joaquim JGF, Giglio RF, Possebon FS, Sakata SH, Miglino MA. Combination of stem cells from deciduous teeth and electroacupuncture for therapy in dogs with chronic spinal cord injury: A pilot study. Res Vet Sci 2019; 123:247-251. [PMID: 30703615 DOI: 10.1016/j.rvsc.2019.01.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 12/10/2018] [Accepted: 01/10/2019] [Indexed: 11/23/2022]
Abstract
Spinal cord injury (SCI) is a serious condition that causes profound economic and emotional impact in human patients and companion animal owners. It has been shown that the neurogenic effects of the stem cells are enhanced when combined with electroacupuncture (EA) in rodent models of SCI. To determine the safety and feasibility of combining transplantation of allogenic stem cells derived from canine exfoliated deciduous teeth (SCED) and EA in dogs with chronic spinal cord injury a canine pilot clinical study was conducted. A total of 16 individuals ranging from 5 to 11 years at 3 to 18 months of injury were investigated and randomly assigned to 4 experimental groups (SCED, EA, SCED + EA, control). Mild neurological and functional improvements were seen in all 4 groups. There was no clinical progression or mortality of the cases occurred in a follow up of 7 months after procedure. The study shows that SCED transplantation and electroacupuncture were feasible, safe and potentially beneficial. However Long-term patient monitoring is necessary to rule out any delayed side effects and assess any further improvements.
Collapse
Affiliation(s)
- César Prado
- School of Veterinary Medicine and Animal Sciences, Department of Surgery, University of Sao Paulo, Sao Paulo, Brazil.
| | - Paula Fratini
- School of Veterinary Medicine and Animal Sciences, Department of Surgery, University of Sao Paulo, Sao Paulo, Brazil
| | - Gustavo de Sá Schiavo Matias
- School of Veterinary Medicine and Animal Sciences, Department of Surgery, University of Sao Paulo, Sao Paulo, Brazil
| | | | | | | | | | - Robson F Giglio
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL, United States
| | - Fabio S Possebon
- Department of Veterinary Hygiene and Public Health, School of Veterinary Medicine and Animal Sciences, Sao Paulo State University, Botucatu, Brazil
| | - Stella H Sakata
- Stella Fisiovet Veterinary Physioterapy Clinic, Sao Paulo, Brazil
| | - Maria A Miglino
- School of Veterinary Medicine and Animal Sciences, Department of Surgery, University of Sao Paulo, Sao Paulo, Brazil.
| |
Collapse
|
69
|
Shen H, Chen X, Li X, Jia K, Xiao Z, Dai J. Transplantation of adult spinal cord grafts into spinal cord transected rats improves their locomotor function. SCIENCE CHINA-LIFE SCIENCES 2019; 62:725-733. [DOI: 10.1007/s11427-019-9490-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2019] [Accepted: 01/22/2019] [Indexed: 12/22/2022]
|
70
|
Zupanc GK. Stem‐Cell‐Driven Growth and Regrowth of the Adult Spinal Cord in Teleost Fish. Dev Neurobiol 2019; 79:406-423. [DOI: 10.1002/dneu.22672] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2018] [Revised: 02/12/2019] [Accepted: 02/25/2019] [Indexed: 01/08/2023]
Affiliation(s)
- Günther K.H. Zupanc
- Laboratory of Neurobiology, Department of Biology Northeastern University Boston Massachusetts
| |
Collapse
|
71
|
Systemic microcirculation dysfunction after low thoracic spinal cord injury in mice. Life Sci 2019; 221:47-55. [PMID: 30738044 DOI: 10.1016/j.lfs.2019.02.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 01/26/2019] [Accepted: 02/03/2019] [Indexed: 11/23/2022]
Abstract
BACKGROUND Spinal cord injury (SCI) disturbs the autonomic nervous system and induces dysfunction or failure of multiple organs. The systemic microcirculation disturbance that contributes to the complications associated with SCI remains to be clarified. METHODS We used male mice (29-32 g) and modified weight-drop injury at T10 to evaluate the systemic microcirculation dysfunction during the first 2 weeks after SCI. We determined permeability and microvascular blood flow in several organs and evaluated their vasomotor function. We also measured circulating endothelial cells (CECs), circulating endothelial progenitor cells (CEPCs), circulating pericyte progenitor cells (CPPCs), and serum proinflammatory cytokines. RESULTS The endothelial permeability of almost all organs increased after SCI. Microvascular blood flow decreased in the bladder and kidney and increased in the spleen and was accompanied by endothelial vasomotor dysfunction. SCI also induced an increase in CECs, CEPCs, and CPPCs in peripheral blood. Finally, we confirmed changes in a systemic cytokine profile (interleukin [IL]-3, IL-6, IL-10, IL-13, granulocyte colony-stimulating factor, and regulated on activation normal T cell expressed and secreted) after SCI. CONCLUSIONS These data indicate that a systemic microcirculation disturbance occurs after SCI. This information may play a key role in the development of effective therapeutic strategies for SCI.
Collapse
|
72
|
Carnagarin R, Kiuchi MG, Ho JK, Matthews VB, Schlaich MP. Sympathetic Nervous System Activation and Its Modulation: Role in Atrial Fibrillation. Front Neurosci 2019; 12:1058. [PMID: 30728760 PMCID: PMC6351490 DOI: 10.3389/fnins.2018.01058] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 12/31/2018] [Indexed: 12/17/2022] Open
Abstract
The autonomic nervous system (ANS) has a significant influence on the structural integrity and electrical conductivity of the atria. Aberrant activation of the sympathetic nervous system can induce heterogeneous changes with arrhythmogenic potential which can result in atrial tachycardia, atrial tachyarrhythmias and atrial fibrillation (AF). Methods to modulate autonomic activity primarily through reduction of sympathetic outflow reduce the incidence of spontaneous or induced atrial arrhythmias in animal models and humans, suggestive of the potential application of such strategies in the management of AF. In this review we focus on the relationship between the ANS, sympathetic overdrive and the pathophysiology of AF, and the potential of sympathetic neuromodulation in the management of AF. We conclude that sympathetic activity plays an important role in the initiation and maintenance of AF, and modulating ANS function is an important therapeutic approach to improve the management of AF in selected categories of patients. Potential therapeutic applications include pharmacological inhibition with central and peripheral sympatholytic agents and various device based approaches. While the role of the sympathetic nervous system has long been recognized, new developments in science and technology in this field promise exciting prospects for the future.
Collapse
Affiliation(s)
- Revathy Carnagarin
- Dobney Hypertension Centre, School of Medicine, Royal Perth Hospital Unit, Medical Research Foundation, The University of Western Australia, Perth, WA, Australia
| | - Marcio G Kiuchi
- Dobney Hypertension Centre, School of Medicine, Royal Perth Hospital Unit, Medical Research Foundation, The University of Western Australia, Perth, WA, Australia
| | - Jan K Ho
- Dobney Hypertension Centre, School of Medicine, Royal Perth Hospital Unit, Medical Research Foundation, The University of Western Australia, Perth, WA, Australia
| | - Vance B Matthews
- Dobney Hypertension Centre, School of Medicine, Royal Perth Hospital Unit, Medical Research Foundation, The University of Western Australia, Perth, WA, Australia
| | - Markus P Schlaich
- Dobney Hypertension Centre, School of Medicine, Royal Perth Hospital Unit, Medical Research Foundation, The University of Western Australia, Perth, WA, Australia.,Departments of Cardiology and Nephrology, Royal Perth Hospital, Perth, WA, Australia.,Neurovascular Hypertension and Kidney Disease Laboratory, Baker Heart and Diabetes Institute, Melbourne, VIC, Australia
| |
Collapse
|
73
|
Ma X, Aravind A, Pfister BJ, Chandra N, Haorah J. Animal Models of Traumatic Brain Injury and Assessment of Injury Severity. Mol Neurobiol 2019; 56:5332-5345. [DOI: 10.1007/s12035-018-1454-5] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Accepted: 12/07/2018] [Indexed: 10/27/2022]
|
74
|
DeWitt DS, Hawkins BE, Dixon CE, Kochanek PM, Armstead W, Bass CR, Bramlett HM, Buki A, Dietrich WD, Ferguson AR, Hall ED, Hayes RL, Hinds SR, LaPlaca MC, Long JB, Meaney DF, Mondello S, Noble-Haeusslein LJ, Poloyac SM, Prough DS, Robertson CS, Saatman KE, Shultz SR, Shear DA, Smith DH, Valadka AB, VandeVord P, Zhang L. Pre-Clinical Testing of Therapies for Traumatic Brain Injury. J Neurotrauma 2018; 35:2737-2754. [PMID: 29756522 PMCID: PMC8349722 DOI: 10.1089/neu.2018.5778] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Despite the large number of promising neuroprotective agents identified in experimental traumatic brain injury (TBI) studies, none has yet shown meaningful improvements in long-term outcome in clinical trials. To develop recommendations and guidelines for pre-clinical testing of pharmacological or biological therapies for TBI, the Moody Project for Translational Traumatic Brain Injury Research hosted a symposium attended by investigators with extensive experience in pre-clinical TBI testing. The symposium participants discussed issues related to pre-clinical TBI testing including experimental models, therapy and outcome selection, study design, data analysis, and dissemination. Consensus recommendations included the creation of a manual of standard operating procedures with sufficiently detailed descriptions of modeling and outcome measurement procedures to permit replication. The importance of the selection of clinically relevant outcome variables, especially related to behavior testing, was noted. Considering the heterogeneous nature of human TBI, evidence of therapeutic efficacy in multiple, diverse (e.g., diffuse vs. focused) rodent models and a species with a gyrencephalic brain prior to clinical testing was encouraged. Basing drug doses, times, and routes of administration on pharmacokinetic and pharmacodynamic data in the test species was recommended. Symposium participants agreed that the publication of negative results would reduce costly and unnecessary duplication of unsuccessful experiments. Although some of the recommendations are more relevant to multi-center, multi-investigator collaborations, most are applicable to pre-clinical therapy testing in general. The goal of these consensus guidelines is to increase the likelihood that therapies that improve outcomes in pre-clinical studies will also improve outcomes in TBI patients.
Collapse
Affiliation(s)
- Douglas S. DeWitt
- Department of Anesthesiology, University of Texas Medical Branch, Galveston, Texas
| | - Bridget E. Hawkins
- Department of Anesthesiology, University of Texas Medical Branch, Galveston, Texas
| | - C. Edward Dixon
- Department of Neurological Surgery, Safar Center for Resuscitation Research, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Patrick M. Kochanek
- Department of Critical Care Medicine, Safar Center for Resuscitation Research, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - William Armstead
- Department of Anesthesiology and Critical Care, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Cameron R. Bass
- Department of Biomedical Engineering, Duke University, Durham, North Carolina
| | - Helen M. Bramlett
- Department of Neurological Surgery, The Miami Project to Cure Paralysis, Miami, Florida
| | - Andras Buki
- Department of Neurosurgery, Medical University of Pécs, Pécs, Hungary
| | - W. Dalton Dietrich
- The Miami Project to Cure Paralysis, Leonard M. Miller School of Medicine, University of Miami, Miami, Florida
| | - Adam R. Ferguson
- Weill Institute for Neurosciences, Brain and Spinal Injury Center (BASIC), Department of Neurological Surgery, University of California, San Francisco (UCSF), San Francisco, California
| | - Edward D. Hall
- Spinal Cord and Brain Injury Research Center (SCoBIRC), University of Kentucky Medical Center, Lexington, Kentucky
| | - Ronald L. Hayes
- University of Florida, Virginia Commonwealth University, Banyan Biomarkers, Inc., Alachua, Florida
| | - Sidney R. Hinds
- United States Army Medical Research and Materiel Command, Fort Detrick, Maryland
| | | | - Joseph B. Long
- Blast-Induced Neurotrauma Branch, Center for Military Psychiatry and Neuroscience, Walter Reed Army Institute of Research, Silver Spring, Maryland
| | - David F. Meaney
- Department of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Stefania Mondello
- Department of Neurosciences, University of Messina, Via Consolare Valeria, Messina, Italy
| | - Linda J. Noble-Haeusslein
- Departments of Neurology and Psychology, Dell Medical School, The University of Texas at Austin, Austin, Texas
| | - Samuel M. Poloyac
- Department of Pharmaceutical Sciences, University of Pittsburgh School of Pharmacy, Pittsburgh, Pennsylvania
| | - Donald S. Prough
- Department of Anesthesiology, University of Texas Medical Branch, Galveston, Texas
| | | | - Kathryn E. Saatman
- Spinal Cord and Brain Injury Research Center (SCoBIRC), University of Kentucky, Lexington, Kentucky
| | - Sandy R. Shultz
- Department of Medicine, Melbourne Brain Center, The University of Melbourne, Parkville, Victoria, Australia
| | - Deborah A. Shear
- Brain Trauma Neuroprotection Program, Walter Reed Army Institute of Research, Silver Spring, Maryland
| | - Douglas H. Smith
- Department of Neurosurgery, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Alex B. Valadka
- Department of Neurosurgery, Virginia Commonwealth University School of Medicine, Richmond, Virginia
| | - Pamela VandeVord
- Department of Biomedical Engineering and Mechanics, Virginia Polytechnic Institute and State University, Blacksburg, Virginia
| | - Liying Zhang
- Department of Biomedical Engineering, Wayne State University, Detroit, Michigan
| |
Collapse
|
75
|
Abstract
The brain undergoes several changes at structural, molecular, and cellular levels leading to alteration in its functions and these processes are primarily maintained by proteostasis in cells. However, an imbalance in proteostasis due to the abnormal accumulation of protein aggregates induces endoplasmic reticulum (ER) stress. This event, in turn, activate the unfolded protein response; however, in most neurodegenerative conditions and brain injury, an uncontrolled unfolded protein response elicits memory dysfunction. Although the underlying signaling mechanism for impairment of memory function following induction of ER stress remains elusive, recent studies have highlighted that inactivation of a transcription factor, CREB, which is essential for synaptic function and memory formation, plays an essential role for ER stress-induced synaptic and memory dysfunction. In this review, current studies and most updated view on how ER stress affects memory function in both physiological and pathological conditions will be highlighted.
Collapse
Affiliation(s)
- Nilkantha Sen
- Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, PA, USA
| |
Collapse
|
76
|
Electrophysiological Correlates of Blast-Wave Induced Cerebellar Injury. Sci Rep 2018; 8:13633. [PMID: 30206255 PMCID: PMC6134123 DOI: 10.1038/s41598-018-31728-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Accepted: 08/24/2018] [Indexed: 12/17/2022] Open
Abstract
Understanding the mechanisms underlying traumatic neural injury and the sequelae of events in the acute phase is important for deciding on the best window of therapeutic intervention. We hypothesized that evoked potentials (EP) recorded from the cerebellar cortex can detect mild levels of neural trauma and provide a qualitative assessment tool for progression of cerebellar injury in time. The cerebellar local field potentials evoked by a mechanical tap on the hand and collected with chronically implanted micro-ECoG arrays on the rat cerebellar cortex demonstrated substantial changes both in amplitude and timing as a result of blast-wave induced injury. The results revealed that the largest EP changes occurred within the first day of injury, and partial recoveries were observed from day-1 to day-3, followed by a period of gradual improvements (day-7 to day-14). The mossy fiber (MF) and climbing fiber (CF) mediated components of the EPs were affected differentially. The behavioral tests (ladder rung walking) and immunohistological analysis (calbindin and caspase-3) did not reveal any detectable changes at these blast pressures that are typically considered as mild (100-130 kPa). The results demonstrate the sensitivity of the electrophysiological method and its use as a tool to monitor the progression of cerebellar injuries in longitudinal animal studies.
Collapse
|
77
|
Lee SW, Gajavelli S, Spurlock MS, Andreoni C, de Rivero Vaccari JP, Bullock MR, Keane RW, Dietrich WD. Microglial Inflammasome Activation in Penetrating Ballistic-Like Brain Injury. J Neurotrauma 2018; 35:1681-1693. [PMID: 29439605 PMCID: PMC6016174 DOI: 10.1089/neu.2017.5530] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Penetrating traumatic brain injury (PTBI) is a significant cause of death and disability in the United States. Inflammasomes are one of the key regulators of the interleukin (IL)-1β mediated inflammatory responses after traumatic brain injury. However, the contribution of inflammasome signaling after PTBI has not been determined. In this study, adult male Sprague-Dawley rats were subjected to sham procedures or penetrating ballistic-like brain injury (PBBI) and sacrificed at various time-points. Tissues were assessed by immunoblot analysis for expression of IL-1β, IL-18, and components of the inflammasome: apoptosis-associated speck-like protein containing a caspase-activation and recruitment domain (ASC), caspase-1, X-linked inhibitor of apoptosis protein (XIAP), nucleotide-binding oligomerization domain (NOD)-like receptor protein 3 (NLRP3), and gasdermin-D (GSDMD). Specific cell types expressing inflammasome proteins also were evaluated immunohistochemically and assessed quantitatively. After PBBI, expression of IL-1β, IL-18, caspase-1, ASC, XIAP, and NLRP3 peaked around 48 h. Brain protein lysates from PTBI animals showed pyroptosome formation evidenced by ASC laddering, and also contained increased expression of GSDMD at 48 h after injury. ASC-positive immunoreactive neurons within the perilesional cortex were observed at 24 h. At 48 h, ASC expression was concentrated in morphologically activated cortical microglia. This expression of ASC in activated microglia persisted until 12 weeks following PBBI. This is the first report of inflammasome activation after PBBI. Our results demonstrate cell-specific patterns of inflammasome activation and pyroptosis predominantly in microglia, suggesting a sustained pro-inflammatory state following PBBI, thus offering a therapeutic target for this type of brain injury.
Collapse
Affiliation(s)
- Stephanie W. Lee
- Department of Neurological Surgery, the Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, Florida
| | - Shyam Gajavelli
- Department of Neurological Surgery, the Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, Florida
| | - Markus S. Spurlock
- Department of Neurological Surgery, the Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, Florida
| | - Cody Andreoni
- Department of Neurological Surgery, the Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, Florida
| | - Juan Pablo de Rivero Vaccari
- Department of Neurological Surgery, the Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, Florida
| | - M. Ross Bullock
- Department of Neurological Surgery, the Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, Florida
| | - Robert W. Keane
- Department of Neurological Surgery, the Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, Florida
- Department of Physiology and Biophysics, 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
| |
Collapse
|
78
|
Skinner NP, Lee SY, Kurpad SN, Schmit BD, Muftuler LT, Budde MD. Filter-probe diffusion imaging improves spinal cord injury outcome prediction. Ann Neurol 2018; 84:37-50. [PMID: 29752739 PMCID: PMC6119508 DOI: 10.1002/ana.25260] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Revised: 05/07/2018] [Accepted: 05/07/2018] [Indexed: 12/16/2022]
Abstract
OBJECTIVE Diffusion-weighted imaging (DWI) is a powerful tool for investigating spinal cord injury (SCI), but has limited specificity for axonal damage, which is the most predictive feature of long-term functional outcome. In this study, a technique designed to detect acute axonal injury, filter-probe double diffusion encoding (FP-DDE), is compared with standard DWI for predicting long-term functional and cellular outcomes. METHODS This study extends FP-DDE to predict long-term functional and histological outcomes in a rat SCI model of varying severities (n = 58). Using a 9.4T magnetic resonance imaging (MRI) system, a whole-cord FP-DDE spectroscopic voxel was acquired in 3 minutes at the lesion site and compared to DWI at 48 hours postinjury. Relationships with chronic (30-day) locomotor and histological outcomes were evaluated with linear regression. RESULTS The FP-DDE measure of parallel diffusivity (ADC|| ) was significantly related to chronic hind limb locomotor functional outcome (R2 = 0.63, p < 0.0001), and combining this measurement with acute functional scores demonstrated prognostic benefit versus functional testing alone (p = 0.0007). Acute ADC|| measurements were also more closely related to the number of injured axons measured 30 days after the injury than standard DWI. Furthermore, acute FP-DDE images showed a clear and easily interpretable pattern of injury that closely corresponded with chronic MRI and histology observations. INTERPRETATION Collectively, these results demonstrate FP-DDE benefits from greater specificity for acute axonal damage in predicting functional and histological outcomes with rapid acquisition and fully automated analysis, improving over standard DWI. FP-DDE is a promising technique compatible with clinical settings, with potential research and clinical applications for evaluation of spinal cord pathology. Ann Neurol 2018;83:37-50.
Collapse
Affiliation(s)
- Nathan P Skinner
- Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, WI
- Medical Scientist Training Program, Medical College of Wisconsin, Milwaukee, WI
| | - Seung-Yi Lee
- Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, WI
- Neuroscience Doctoral Program, Medical College of Wisconsin, Milwaukee, WI
- Biophysics Graduate Program, Medical College of Wisconsin, Milwaukee, WI
| | - Shekar N Kurpad
- Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, WI
| | - Brian D Schmit
- Department of Biomedical Engineering, Marquette University, Milwaukee, WI
| | - L Tugan Muftuler
- Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, WI
| | - Matthew D Budde
- Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, WI
| |
Collapse
|
79
|
Hassanzadeh P, Atyabi F, Dinarvand R. Tissue engineering: Still facing a long way ahead. J Control Release 2018; 279:181-197. [DOI: 10.1016/j.jconrel.2018.04.024] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Revised: 04/09/2018] [Accepted: 04/11/2018] [Indexed: 02/07/2023]
|
80
|
Stamegna JC, Sadelli K, Escoffier G, Girard SD, Veron AD, Bonnet A, Khrestchatisky M, Gauthier P, Roman FS. Grafts of Olfactory Stem Cells Restore Breathing and Motor Functions after Rat Spinal Cord Injury. J Neurotrauma 2018; 35:1765-1780. [PMID: 29357739 DOI: 10.1089/neu.2017.5383] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The transplantation of olfactory ecto-mesenchymal stem cells (OEMSCs) could be a helpful therapeutic strategy for spinal cord repair. Using an acute rat model of high cervical contusion that provokes a persistent hemidiaphragmatic and foreleg paralysis, we evaluated the therapeutic effect of a delayed syngeneic transplantation (two days post-contusion) of OEMSCs within the injured spinal cord. Respiratory function was assessed using diaphragmatic electromyography and neuroelectrophysiological recordings of phrenic nerves (innervating the diaphragm). Locomotor function was evaluated using the ladder-walking locomotor test. Cellular reorganization in the injured area was also studied using immunohistochemical and microscopic techniques. We report a substantial improvement in breathing movements, in activities of the ipsilateral phrenic nerve and ipsilateral diaphragm, and also in locomotor abilities four months post-transplantation with nasal OEMSCs. Moreover, in the grafted spinal cord, axonal disorganization and inflammation were reduced. Some grafted stem cells adopted a neuronal phenotype, and axonal sparing was observed in the injury site. The therapeutic effect on the supraspinal command is presumably because of both neuronal replacements and beneficial paracrine effects on the injury area. Our study provides evidence that nasal OEMSCs could be a first step in clinical application, particularly in patients with reduced breathing/locomotor movements.
Collapse
Affiliation(s)
- Jean-Claude Stamegna
- 1 Institut de Neurophysiopathologie, Aix-Marseille Université , Marseille, France
| | - Kevin Sadelli
- 1 Institut de Neurophysiopathologie, Aix-Marseille Université , Marseille, France
| | - Guy Escoffier
- 1 Institut de Neurophysiopathologie, Aix-Marseille Université , Marseille, France
| | - Stéphane D Girard
- 1 Institut de Neurophysiopathologie, Aix-Marseille Université , Marseille, France
| | - Antoine D Veron
- 1 Institut de Neurophysiopathologie, Aix-Marseille Université , Marseille, France .,2 IRSEA, Research Institute in Semiochemistry and Applied Ethology , Apt, France
| | - Amandine Bonnet
- 1 Institut de Neurophysiopathologie, Aix-Marseille Université , Marseille, France
| | | | - Patrick Gauthier
- 3 Laboratoire de Neurosciences et Cognitives, Aix-Marseille Université , Marseille, France
| | - François S Roman
- 1 Institut de Neurophysiopathologie, Aix-Marseille Université , Marseille, France
| |
Collapse
|
81
|
Haggerty AE, Maldonado-Lasunción I, Oudega M. Biomaterials for revascularization and immunomodulation after spinal cord injury. ACTA ACUST UNITED AC 2018; 13:044105. [PMID: 29359704 DOI: 10.1088/1748-605x/aaa9d8] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Spinal cord injury (SCI) causes immediate damage to the nervous tissue accompanied by loss of motor and sensory function. The limited self-repair competence of injured nervous tissue underscores the need for reparative interventions to recover function after SCI. The vasculature of the spinal cord plays a crucial role in SCI and repair. Ruptured and sheared blood vessels in the injury epicenter and blood vessels with a breached blood-spinal cord barrier (BSCB) in the surrounding tissue cause bleeding and inflammation, which contribute to the overall tissue damage. The insufficient formation of new functional vasculature in and near the injury impedes endogenous tissue repair and limits the prospect of repair approaches. Limiting the loss of blood vessels, stabilizing the BSCB, and promoting the formation of new blood vessels are therapeutic targets for spinal cord repair. Inflammation is an integral part of injury-mediated vascular damage, which has deleterious and reparative consequences. Inflammation and the formation of new blood vessels are intricately interwoven. Biomaterials can be effectively used for promoting and guiding blood vessel formation or modulating the inflammatory response after SCI, thereby governing the extent of damage and the success of reparative interventions. This review deals with the vasculature after SCI, the reciprocal interactions between inflammation and blood vessel formation, and the potential of biomaterials to support revascularization and immunomodulation in damaged spinal cord nervous tissue.
Collapse
Affiliation(s)
- Agnes E Haggerty
- The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, FL, United States of America
| | | | | |
Collapse
|
82
|
Tang R, Lin YM, Liu HX, Wang ES. Neuroprotective effect of docosahexaenoic acid in rat traumatic brain injury model via regulation of TLR4/NF-Kappa B signaling pathway. Int J Biochem Cell Biol 2018; 99:64-71. [PMID: 29597004 DOI: 10.1016/j.biocel.2018.03.017] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Revised: 03/23/2018] [Accepted: 03/26/2018] [Indexed: 01/08/2023]
Abstract
OBJECTIVE The experiments were conducted to prove that docosahexaenoic acid (DHA) alleviates traumatic brain injury (TBI) through regulating TLR4/NF-Kappa B signaling pathway. METHODS Bioinformatic analysis was performed using published data from Gene Expression Omnibus (GEO) database to investigate differentially expressed genes and signaling pathways. Controlled cortical impact (CCI) injury rat model was built, and DHA (16 mg/kg in DMSO, once each day) was used to treat TBI rats. Neurological severity score (NSS) and beam walking test and rotarod test were used to confirm whether DHA is neuron-protective against TBI. The expression of TLR4, NF-Kappa B p65, (TNF)-α and IL-1β were examined by qRT-PCR and western blot. The impact of DHA on neurocyte apoptosis was validated by TdT-mediated dUTP Nick-End Labeling (TUNEL) staining. The influence of DHA on CD11b and GFAP expression in the hippocampus was determined through immunohistochemical analysis. RESULTS TLR4/NF Kappa B pathway was suggested to be closely correlated with TBI by bioinformatic analysis. DHA could improve the neurological function and learning and memory ability of rats after TBI as well as promote neurocytes from apoptosis. TLR4 expression and the expression of inflammatory mediator NF-Kappa B were also repressed by DHA treatment. CONCLUSIONS DHA exerted a neuron-protective influence in a rat model of TBI via repressing TLR4/NF-Kappa B pathway.
Collapse
Affiliation(s)
- Ri Tang
- Department of Neurosurgery, Jinshan Hospital of Fudan University, Shanghai, 200540, China
| | - Yi-Mei Lin
- Department of Gastroenterology, Fuqing City Hospital of Fujian Province, Fuqing, 350300, Fujian, China
| | - Hong-Xing Liu
- Department of Neurosurgery, First Affiliated Hospital of Fujian Medical University, Fuzhou, 350005, Fujian, China
| | - Er-Song Wang
- Department of Neurosurgery, Jinshan Hospital of Fudan University, Shanghai, 200540, China.
| |
Collapse
|
83
|
Sozbilen MC, Ozturk M, Kaftan G, Dagci T, Ozyalcin H, Armagan G. Neuroprotective Effects of C-terminal Domain of Tetanus Toxin on Rat Brain Against Motorneuron Damages After Experimental Spinal Cord Injury. Spine (Phila Pa 1976) 2018; 43:E327-E333. [PMID: 28767631 DOI: 10.1097/brs.0000000000002357] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
STUDY DESIGN Experimental animal study investigating the efficacy of C-terminal domain of tetanus toxin application as neuroprotective effects on rat brain in a model of spinal cord injury (SCI). OBJECTIVE The aim of the present study was to investigate the possible role of C-terminal domain of tetanus toxin (Hc-TeTx) on cell death mechanisms including apoptosis and autophagy following SCI. SUMMARY OF BACKGROUND DATA Traumatic SCI can lead to posttraumatic inflammation, oxidative stress, motor neuron apoptosis, necrosis, and autophagy of tissue. To promote and enhance recovery after SCI, recent development of devices and therapeutic interventions are needed. METHODS Twenty-eight adult rats were divided into four groups (n = 7 each) as follows: sham, trauma (SCI), SCI + Hc-TeTx, and SCI + methylprednisolone groups. The functional neurological deficits due to the SCI were assessed by behavioral analysis using the Basso, Beattie and Bresnahan (BBB) open-field locomotor test. The alterations in pro-/anti-apoptotic and autophagy related-protein levels were measured by Western blotting technique. RESULTS In this study, Hc-TeTx promotes locomotor recovery and motor neuron survival of SCI rats. Hc-TeTx also decreased expression of bax, bad, bak, cleaved caspase-3, Ask1, and autophagy-related proteins including Atg5 and LC3II in brain. Our study provides an evidence that cell death mechanisms play critical roles in SCI and that the nontoxic peptides including Hc-TeTx may exert protective effect and decrease cell death following SCI. CONCLUSION Our preliminary findings suggest a possible therapeutic agent to improve survival after spinal cord trauma, but further analysis are still needed to evaluate the difference between acute and chronic injuries. LEVEL OF EVIDENCE N/A.
Collapse
Affiliation(s)
- Murat Celal Sozbilen
- Department of Orthopaedics and Traumatology, Dr Behcet Uz Child Diseases and Surgery Research and Training Hospital, Konak Izmir, Turkey
| | - Murat Ozturk
- Department of Orthopaedic Surgery, School of Medicine Hospital, Ege University, Bornova, Izmir, Turkey
| | - Gizem Kaftan
- Department of Biochemistry, Faculty of Pharmacy, Ege University, Bornova, Izmir, Turkey
| | - Taner Dagci
- Department of Physiology, School of Medicine, Ege University, Bornova, Izmir, Turkey.,Center for Brain Research, Ege University, Bornova, Izmir, Turkey
| | - Halit Ozyalcin
- Department of Orthopaedic Surgery, School of Medicine Hospital, Ege University, Bornova, Izmir, Turkey
| | - Guliz Armagan
- Department of Biochemistry, Faculty of Pharmacy, Ege University, Bornova, Izmir, Turkey
| |
Collapse
|
84
|
Tucker LB, Velosky AG, McCabe JT. Applications of the Morris water maze in translational traumatic brain injury research. Neurosci Biobehav Rev 2018; 88:187-200. [PMID: 29545166 DOI: 10.1016/j.neubiorev.2018.03.010] [Citation(s) in RCA: 102] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 03/09/2018] [Accepted: 03/09/2018] [Indexed: 12/21/2022]
Abstract
Acquired traumatic brain injury (TBI) is frequently accompanied by persistent cognitive symptoms, including executive function disruptions and memory deficits. The Morris Water Maze (MWM) is the most widely-employed laboratory behavioral test for assessing cognitive deficits in rodents after experimental TBI. Numerous protocols exist for performing the test, which has shown great robustness in detecting learning and memory deficits in rodents after infliction of TBI. We review applications of the MWM for the study of cognitive deficits following TBI in pre-clinical studies, describing multiple ways in which the test can be employed to examine specific aspects of learning and memory. Emphasis is placed on dependent measures that are available and important controls that must be considered in the context of TBI. Finally, caution is given regarding interpretation of deficits as being indicative of dysfunction of a single brain region (hippocampus), as experimental models of TBI most often result in more diffuse damage that disrupts multiple neural pathways and larger functional networks that participate in complex behaviors required in MWM performance.
Collapse
Affiliation(s)
- Laura B Tucker
- Department of Anatomy, Physiology & Genetics, F.E. Hébert School of Medicine, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, MD, 20814, USA; Pre-Clinical Studies Core, Center for Neuroscience and Regenerative Medicine, F.E. Hébert School of Medicine, Uniformed Services University of the Health Sciences, 4301, Jones Bridge Road, Bethesda, MD, 20814, USA.
| | - Alexander G Velosky
- Department of Anatomy, Physiology & Genetics, F.E. Hébert School of Medicine, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, MD, 20814, USA.
| | - Joseph T McCabe
- Department of Anatomy, Physiology & Genetics, F.E. Hébert School of Medicine, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, MD, 20814, USA; Pre-Clinical Studies Core, Center for Neuroscience and Regenerative Medicine, F.E. Hébert School of Medicine, Uniformed Services University of the Health Sciences, 4301, Jones Bridge Road, Bethesda, MD, 20814, USA.
| |
Collapse
|
85
|
Bhatti J, Nascimento B, Akhtar U, Rhind SG, Tien H, Nathens A, da Luz LT. Systematic Review of Human and Animal Studies Examining the Efficacy and Safety of N-Acetylcysteine (NAC) and N-Acetylcysteine Amide (NACA) in Traumatic Brain Injury: Impact on Neurofunctional Outcome and Biomarkers of Oxidative Stress and Inflammation. Front Neurol 2018; 8:744. [PMID: 29387038 PMCID: PMC5776005 DOI: 10.3389/fneur.2017.00744] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Accepted: 12/22/2017] [Indexed: 12/22/2022] Open
Abstract
Background No new therapies for traumatic brain injury (TBI) have been officially translated into current practice. At the tissue and cellular level, both inflammatory and oxidative processes may be exacerbated post-injury and contribute to further brain damage. N-acetylcysteine (NAC) has the potential to downregulate both processes. This review focuses on the potential neuroprotective utility of NAC and N-acetylcysteine amide (NACA) post-TBI. Methods Medline, Embase, Cochrane Library, and ClinicalTrials.gov were searched up to July 2017. Studies that examined clinical and laboratory effects of NAC and NACA post-TBI in human and animal studies were included. Risk of bias was assessed in human and animal studies according to the design of each study (randomized or not). The primary outcome assessed was the effect of NAC/NACA treatment on functional outcome, while secondary outcomes included the impact on biomarkers of inflammation and oxidation. Due to the clinical and methodological heterogeneity observed across studies, no meta-analyses were conducted. Results Our analyses revealed only three human trials, including two randomized controlled trials (RCTs) and 20 animal studies conducted using standardized animal models of brain injury. The two RCTs reported improvement in the functional outcome post-NAC/NACA administration. Overall, the evidence from animal studies is more robust and demonstrated substantial improvement of cognition and psychomotor performance following NAC/NACA use. Animal studies also reported significantly more cortical sparing, reduced apoptosis, and lower levels of biomarkers of inflammation and oxidative stress. No safety concerns were reported in any of the studies included in this analysis. Conclusion Evidence from the animal literature demonstrates a robust association for the prophylactic application of NAC and NACA post-TBI with improved neurofunctional outcomes and downregulation of inflammatory and oxidative stress markers at the tissue level. While a growing body of scientific literature suggests putative beneficial effects of NAC/NACA treatment for TBI, the lack of well-designed and controlled clinical investigations, evaluating therapeutic outcomes, prognostic biomarkers, and safety profiles, limits definitive interpretation and recommendations for its application in humans at this time.
Collapse
Affiliation(s)
- Junaid Bhatti
- Sunnybrook Research Institute, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON, Canada
| | - Barto Nascimento
- Sunnybrook Research Institute, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON, Canada
| | - Umbreen Akhtar
- Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON, Canada
| | - Shawn G Rhind
- Defense Research and Development Canada (DRDC), Toronto Research Centre, Toronto, ON, Canada
| | - Homer Tien
- Sunnybrook Research Institute, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON, Canada
| | - Avery Nathens
- Sunnybrook Research Institute, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON, Canada
| | - Luis Teodoro da Luz
- Sunnybrook Research Institute, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON, Canada
| |
Collapse
|
86
|
Mettang M, Reichel SN, Lattke M, Palmer A, Abaei A, Rasche V, Huber-Lang M, Baumann B, Wirth T. IKK2/NF-κB signaling protects neurons after traumatic brain injury. FASEB J 2018; 32:1916-1932. [PMID: 29187362 PMCID: PMC5893169 DOI: 10.1096/fj.201700826r] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Traumatic brain injury (TBI) is the leading cause of death in young adults. After the initial injury, a poorly understood secondary phase, including a strong inflammatory response determines the final outcome of TBI. The inhibitor of NF-κB kinase (IKK)/NF-κB signaling system is the key regulator of inflammation and also critically involved in regulation of neuronal survival and synaptic plasticity. We addressed the neuron-specific function of IKK2/NF-κB signaling pathway in TBI using an experimental model of closed-head injury (CHI) in combination with mouse models allowing conditional regulation of IKK/NF-κB signaling in excitatory forebrain neurons. We found that repression of IKK2/NF-κB signaling in neurons increases the acute posttraumatic mortality rate, worsens the neurological outcome, and promotes neuronal cell death by apoptosis, thus resulting in enhanced proinflammatory gene expression. As a potential mechanism, we identified elevated levels of the proapoptotic mediators Bax and Bad and enhanced expression of stress response genes. This phenotype is also observed when neuronal IKK/NF-κB activity is inhibited just before CHI. In contrast, neuron-specific activation of IKK/NF-κB signaling does not alter the TBI outcome. Thus, this study demonstrates that physiological neuronal IKK/NF-κB signaling is necessary and sufficient to protect neurons from trauma consequences.-Mettang, M., Reichel, S. N., Lattke, M., Palmer, A., Abaei, A., Rasche, V., Huber-Lang, M., Baumann, B., Wirth, T. IKK2/NF-κB signaling protects neurons after traumatic brain injury.
Collapse
Affiliation(s)
- Melanie Mettang
- Institute of Physiological Chemistry, Ulm University, Ulm, Germany
| | | | - Michael Lattke
- Institute of Physiological Chemistry, Ulm University, Ulm, Germany.,Neural Stem Cell Biology Laboratory, The Francis Crick Institute, London, United Kingdom
| | - Annette Palmer
- Institute of Clinical and Experimental Trauma-Immunology, University Hospital Ulm, Ulm, Germany
| | - Alireza Abaei
- Core Facility Small Animal Magnetic Resonance Imaging, Ulm University, Ulm, Germany
| | - Volker Rasche
- Core Facility Small Animal Magnetic Resonance Imaging, Ulm University, Ulm, Germany
| | - Markus Huber-Lang
- Institute of Clinical and Experimental Trauma-Immunology, University Hospital Ulm, Ulm, Germany
| | - Bernd Baumann
- Institute of Physiological Chemistry, Ulm University, Ulm, Germany
| | - Thomas Wirth
- Institute of Physiological Chemistry, Ulm University, Ulm, Germany
| |
Collapse
|
87
|
Halder SK, Kant R, Milner R. Chronic mild hypoxia promotes profound vascular remodeling in spinal cord blood vessels, preferentially in white matter, via an α5β1 integrin-mediated mechanism. Angiogenesis 2018; 21:251-266. [PMID: 29299782 DOI: 10.1007/s10456-017-9593-2] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Accepted: 12/26/2017] [Indexed: 12/15/2022]
Abstract
Spinal cord injury (SCI) leads to rapid destruction of neuronal tissue, resulting in devastating motor and sensory deficits. This is exacerbated by damage to spinal cord blood vessels and loss of vascular integrity. Thus, approaches that protect existing blood vessels or stimulate the growth of new blood vessels might present a novel approach to minimize loss or promote regeneration of spinal cord tissue following SCI. In light of the remarkable power of chronic mild hypoxia (CMH) to stimulate vascular remodeling in the brain, the goal of this study was to examine how CMH (8% O2 for up to 7 days) affects blood vessel remodeling in the spinal cord. We found that CMH promoted the following: (1) endothelial proliferation and increased vascularity as a result of angiogenesis and arteriogenesis, (2) increased vascular expression of the angiogenic extracellular matrix protein fibronectin as well as concomitant increases in endothelial expression of the fibronectin receptor α5β1 integrin, (3) strongly upregulated endothelial expression of the tight junction proteins claudin-5, ZO-1 and occludin and (4) astrocyte activation. Of note, the vascular remodeling changes induced by CMH were more extensive in white matter. Interestingly, hypoxic-induced vascular remodeling in spinal cord blood vessels was markedly attenuated in mice lacking endothelial α5 integrin expression (α5-EC-KO mice). Taken together, these studies demonstrate the considerable remodeling potential of spinal cord blood vessels and highlight an important angiogenic role for the α5β1 integrin in promoting endothelial proliferation. They also imply that stimulation of the α5β1 integrin or controlled use of mild hypoxia might provide new approaches for promoting angiogenesis and improving vascular integrity in spinal cord blood vessels.
Collapse
Affiliation(s)
- Sebok K Halder
- Department of Molecular Medicine, MEM-132, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA
| | - Ravi Kant
- Department of Molecular Medicine, MEM-132, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA
| | - Richard Milner
- Department of Molecular Medicine, MEM-132, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA.
| |
Collapse
|
88
|
Campolo M, Esposito E, Cuzzocrea S. A Controlled Cortical Impact Preclinical Model of Traumatic Brain Injury. Methods Mol Biol 2018; 1727:385-391. [PMID: 29222798 DOI: 10.1007/978-1-4939-7571-6_30] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Over the past three decades, attempts at understanding the multifaceted mechanisms underlying the pathophysiology of traumatic brain injury (TBI) have seen the development of numerous animal models to investigate changes in molecular and cellular pathways and neurobehavioral outcomes. Until now, controlled cortical impact (CCI) represents the most frequently used mechanical model to induce TBI, given its accuracy, easy of control, and, most importantly, its ability to produce brain injuries similar to those seen in humans. The CCI model is based on the use of an impact system that delivers a physical impact to the exposed dura of an animal. This chapter will describe in detail the electromagnetic CCI model of TBI in mice.
Collapse
Affiliation(s)
- Michela Campolo
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Messina, Italy
| | - Emanuela Esposito
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Messina, Italy
| | - Salvatore Cuzzocrea
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Messina, Italy.
- Department of Pharmacology and Physiology, Saint Louis University, St. Louis, MO, USA.
| |
Collapse
|
89
|
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.
Collapse
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
| | -
- a Minneapolis Veterans Affairs Health Care System , Minneapolis , MN , USA.,b Department of Psychiatry , University of Minnesota , Minneapolis , MN , USA
| |
Collapse
|
90
|
Qin H, Qin J, Hu J, Huang H, Ma L. Malva Sylvestris Attenuates Cognitive Deficits in a Repetitive Mild Traumatic Brain Injury Rat Model by Reducing Neuronal Degeneration and Astrocytosis in the Hippocampus. Med Sci Monit 2017; 23:6099-6106. [PMID: 29276216 PMCID: PMC5749139 DOI: 10.12659/msm.905429] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Background The aim of our study was to evaluate the effect of Malva sylvestris (MS) on cognitive dysfunction in a repetitive mild traumatic brain injury (MTBI). Material/Methods MTBI was induced in all the study animals by hitting a metallic pendulum near the parietal-occipital area of the skull three times a day for ten days. Animals were treated with MS (250 mg/kg and 500 mg/kg) intragastrically per day for seven consecutive days. Cognitive function was estimated by the Morris water maze (MWM) method. Histopathology studies were performed on the hippocampal region by Nissl staining and anti GFAP staining. Concentrations of reactive oxygen species (ROS), and oxidative parameters including superoxide dismutase (SOD), catalase (CAT), and lipid peroxidation (LPO), and inflammatory cytokines in the brain tissues were measured. Result Treatment with MS significantly improved cognitive function compared to the negative control. Histopathology studies suggested that treatment with MS significantly decreased (p<0.01) the count of neurodegenerative cells and induction of astrocytosis in the MTBI treated group compared to the negative control group. However, the concentrations of ROS and LPO, and the activities of SOD and CAT were significantly decreased in the MS treated groups of MTBI rats compared to the negative control group. Inflammatory cytokines, such as IL-1β, IL6, and TNF-α were significantly decreased (p<0.01) in the brain tissues of the MTBI treated group compared to the control group of rats. Conclusions This study concluded that treatment with MS significantly improved cognitive dysfunction by reducing neurodegeneration and astrocytosis in brain tissues via decreasing oxidative stress and inflammation in neuronal cells.
Collapse
Affiliation(s)
- Hailin Qin
- Department of Neurosurgery, Southern Medical University, Guangzhou, Guangdong, China (mainland).,Department of Neurosurgery, Wuhan General Hospital of PLA, Wuhan, Hubei, China (mainland)
| | - Jie Qin
- Department of Neurosurgery, Wuhan General Hospital of PLA, Wuhan, Hubei, China (mainland)
| | - Junmin Hu
- Department of Neurosurgery, Wuhan General Hospital of PLA, Wuhan, Hubei, China (mainland)
| | - He Huang
- Department of Neurosurgery, Wuhan General Hospital of PLA, Wuhan, Hubei, China (mainland)
| | - Lianting Ma
- Department of Neurosurgery, Southern Medical University, Guangzhou, Guangdong, China (mainland).,Department of Neurosurgery, Wuhan General Hospital of PLA, Wuhan, Hubei, China (mainland)
| |
Collapse
|
91
|
Wang J, Ma MW, Dhandapani KM, Brann DW. Regulatory role of NADPH oxidase 2 in the polarization dynamics and neurotoxicity of microglia/macrophages after traumatic brain injury. Free Radic Biol Med 2017; 113:119-131. [PMID: 28942245 DOI: 10.1016/j.freeradbiomed.2017.09.017] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 08/21/2017] [Accepted: 09/19/2017] [Indexed: 12/29/2022]
Abstract
Traumatic brain injury (TBI) is a leading cause of death and disability. Secondary injuries that develop after the initial trauma contribute to long-lasting neurophysiological deficits. Polarization of microglia/macrophages toward a pro-inflammatory (M1) phenotype may increase the progression of secondary injury following TBI; however, the regulatory and functional mechanisms underlying these changes remain poorly defined. In the present study, we showed elevated expression of NADPH oxidase 2 (NOX2) and activation of nuclear factor-kappa B (NF-κB) predominantly in microglia/macrophages at 4- and 7-days after controlled cortical impact in mice. Delayed inhibition of NOX2, beginning one day after TBI, reduced reactive oxygen species production of myeloid cells and protected neurons from oxidative damage. Moreover, delayed NOX inhibition or global genetic NOX2 knockout suppressed the M1 "pro-inflammatory" profile of microglia/macrophages and simultaneously increased the M2 "anti-inflammatory" profile in the injured brain. These changes were associated with marked down-regulation of the classical NF-κB pathway in microglia/macrophages and reduced production of pro-inflammatory cytokines, tumor necrosis factor-α and interleukin-1β, after TBI. Finally, we demonstrated that wild-type microglia/macrophages isolated from the ipsilateral cortex at 7 days post-TBI were neurotoxic to co-cultured primary neurons, whereas this neurotoxicity was largely attenuated in microglia/macrophages from NOX2-KO mice. Taken together, our study shows a direct link between NOX2 and the NF-κB pathway in microglia/macrophages after TBI, and it provides a novel mechanism by which NOX2 activation leads to the enhanced inflammatory response and neuronal damage after brain injury. Our data also supports the therapeutic potential of targeting NOX2, which may provide efficacy with an extended therapeutic window after TBI.
Collapse
Affiliation(s)
- Jing Wang
- Charlie Norwood Medical Center, One Freedom Way, Augusta, GA 30904, USA; Department of Neuroscience and Regenerative Medicine, Medical College of Georgia, Augusta University, 1120 15th Street, CA-4004, Augusta, GA 30912, USA
| | - Merry W Ma
- Charlie Norwood Medical Center, One Freedom Way, Augusta, GA 30904, USA; Department of Neuroscience and Regenerative Medicine, Medical College of Georgia, Augusta University, 1120 15th Street, CA-4004, Augusta, GA 30912, USA
| | - Krishnan M Dhandapani
- Charlie Norwood Medical Center, One Freedom Way, Augusta, GA 30904, USA; Department of Neurosurgery, Medical College of Georgia, Augusta University, Augusta, GA, USA
| | - Darrell W Brann
- Charlie Norwood Medical Center, One Freedom Way, Augusta, GA 30904, USA; Department of Neuroscience and Regenerative Medicine, Medical College of Georgia, Augusta University, 1120 15th Street, CA-4004, Augusta, GA 30912, USA.
| |
Collapse
|
92
|
Liu X, Zhao Z, Ji R, Zhu J, Sui QQ, Knight GE, Burnstock G, He C, Yuan H, Xiang Z. Inhibition of P2X7 receptors improves outcomes after traumatic brain injury in rats. Purinergic Signal 2017; 13:529-544. [PMID: 28823092 PMCID: PMC5714842 DOI: 10.1007/s11302-017-9579-y] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Accepted: 08/03/2017] [Indexed: 11/30/2022] Open
Abstract
Traumatic brain injury (TBI) is the leading cause of death and disability for people under the age of 45 years worldwide. Neuropathology after TBI is the result of both the immediate impact injury and secondary injury mechanisms. Secondary injury is the result of cascade events, including glutamate excitotoxicity, calcium overloading, free radical generation, and neuroinflammation, ultimately leading to brain cell death. In this study, the P2X7 receptor (P2X7R) was detected predominately in microglia of the cerebral cortex and was up-regulated on microglial cells after TBI. The microglia transformed into amoeba-like and discharged many microvesicle (MV)-like particles in the injured and adjacent regions. A P2X7R antagonist (A804598) and an immune inhibitor (FTY720) reduced significantly the number of MV-like particles in the injured/adjacent regions and in cerebrospinal fluid, reduced the number of neurons undergoing apoptotic cell death, and increased the survival of neurons in the cerebral cortex injured and adjacent regions. Blockade of the P2X7R and FTY720 reduced interleukin-1βexpression, P38 phosphorylation, and glial activation in the cerebral cortex and improved neurobehavioral outcomes after TBI. These data indicate that MV-like particles discharged by microglia after TBI may be involved in the development of local inflammation and secondary nerve cell injury.
Collapse
Affiliation(s)
- Xiaofeng Liu
- Department of Neurobiology, MOE Key Laboratory of Molecular Neurobiology, Ministry of Education, Neuroscience Research Centre of Changzheng Hospital, Second Military Medical University, Shanghai, 200433, People's Republic of China
| | - Zhengqing Zhao
- Department of Neurology, Neuroscience Research Center of Changzheng Hospital, Second Military Medical University Shanghai, Yangpu Qu, People's Republic of China
| | - Ruihua Ji
- Department of Anesthesiology, Changzheng Hospital, Second Military Medical University, 415 Fengyang Road, Shanghai, 200003, People's Republic of China
| | - Jiao Zhu
- Department of Neurobiology, MOE Key Laboratory of Molecular Neurobiology, Ministry of Education, Neuroscience Research Centre of Changzheng Hospital, Second Military Medical University, Shanghai, 200433, People's Republic of China
| | - Qian-Qian Sui
- Department of Neurobiology, MOE Key Laboratory of Molecular Neurobiology, Ministry of Education, Neuroscience Research Centre of Changzheng Hospital, Second Military Medical University, Shanghai, 200433, People's Republic of China
| | - Gillian E Knight
- Autonomic Neuroscience Centre, University College Medical School, Rowland Hill Street, London, NW3 2PF, UK
| | - Geoffrey Burnstock
- Autonomic Neuroscience Centre, University College Medical School, Rowland Hill Street, London, NW3 2PF, UK
- Department of Pharmacology, Melbourne University, Parkville, Australia
| | - Cheng He
- Department of Neurobiology, MOE Key Laboratory of Molecular Neurobiology, Ministry of Education, Neuroscience Research Centre of Changzheng Hospital, Second Military Medical University, Shanghai, 200433, People's Republic of China
| | - Hongbin Yuan
- Department of Anesthesiology, Changzheng Hospital, Second Military Medical University, 415 Fengyang Road, Shanghai, 200003, People's Republic of China.
| | - Zhenghua Xiang
- Department of Neurobiology, MOE Key Laboratory of Molecular Neurobiology, Ministry of Education, Neuroscience Research Centre of Changzheng Hospital, Second Military Medical University, Shanghai, 200433, People's Republic of China.
| |
Collapse
|
93
|
Wang X, Wu X, Liu Q, Kong G, Zhou J, Jiang J, Wu X, Huang Z, Su W, Zhu Q. Ketogenic Metabolism Inhibits Histone Deacetylase (HDAC) and Reduces Oxidative Stress After Spinal Cord Injury in Rats. Neuroscience 2017; 366:36-43. [DOI: 10.1016/j.neuroscience.2017.09.056] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Revised: 09/26/2017] [Accepted: 09/28/2017] [Indexed: 12/12/2022]
|
94
|
Marin C, Laxe S, Langdon C, Berenguer J, Lehrer E, Mariño-Sánchez F, Alobid I, Bernabeu M, Mullol J. Olfactory function in an excitotoxic model for secondary neuronal degeneration: Role of dopaminergic interneurons. Neuroscience 2017; 364:28-44. [PMID: 28918258 DOI: 10.1016/j.neuroscience.2017.09.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 09/01/2017] [Accepted: 09/05/2017] [Indexed: 12/26/2022]
Abstract
Secondary neuronal degeneration (SND) occurring in Traumatic brain injury (TBI) consists in downstream destructive events affecting cells that were not or only marginally affected by the initial wound, further increasing the effects of the primary injury. Glutamate excitotoxicity is hypothesized to play an important role in SND. TBI is a common cause of olfactory dysfunction that may be spontaneous and partially recovered. The role of the glutamate excitotoxicity in the TBI-induced olfactory dysfunction is still unknown. We investigated the effects of excitotoxicity induced by bilateral N-Methyl-D-Aspartate (NMDA) OB administration in the olfactory function, OB volumes, and subventricular zone (SVZ) and OB neurogenesis in rats. NMDA OB administration induced a decrease in the number of correct choices in the olfactory discrimination tests one week after lesions (p<0.01), and a spontaneous recovery of the olfactory deficit two weeks after lesions (p<0.05). A lack of correlation between OB volumes and olfactory function was observed. An increase in SVZ neurogenesis (Ki67+ cells, PSANCAM+ cells (p<0.01) associated with an increase in OB glomerular dopaminergic immunostaining (p<0.05) were related to olfactory function recovery. The present results show that changes in OB volumes cannot explain the recovery of the olfactory function and suggest a relevant role for dopaminergic OB interneurons in the pathophysiology of recovery of loss of smell in TBI.
Collapse
Affiliation(s)
- Concepció Marin
- INGENIO, IRCE, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain.
| | - Sara Laxe
- Brain Injury Unit, Guttmann-Institut-Hospital for Neurorehabilitation adscript UAB, Badalona, Barcelona, Catalonia, Spain
| | - Cristobal Langdon
- Rhinology Unit and Smell Clinic, ENT Department, Hospital Clinic, Barcelona, Catalonia, Spain; Centre for Biomedical Investigation in Respiratory Diseases (CIBERES), Spain
| | - Joan Berenguer
- Neuroradiology Department, Hospital Clinic, Barcelona, Catalonia, Spain
| | - Eduardo Lehrer
- Rhinology Unit and Smell Clinic, ENT Department, Hospital Clinic, Barcelona, Catalonia, Spain
| | - Franklin Mariño-Sánchez
- Rhinology Unit and Smell Clinic, ENT Department, Hospital Clinic, Barcelona, Catalonia, Spain; Centre for Biomedical Investigation in Respiratory Diseases (CIBERES), Spain
| | - Isam Alobid
- Rhinology Unit and Smell Clinic, ENT Department, Hospital Clinic, Barcelona, Catalonia, Spain; Centre for Biomedical Investigation in Respiratory Diseases (CIBERES), Spain
| | - Montserrat Bernabeu
- Brain Injury Unit, Guttmann-Institut-Hospital for Neurorehabilitation adscript UAB, Badalona, Barcelona, Catalonia, Spain
| | - Joaquim Mullol
- INGENIO, IRCE, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Catalonia, Spain; Rhinology Unit and Smell Clinic, ENT Department, Hospital Clinic, Barcelona, Catalonia, Spain; Centre for Biomedical Investigation in Respiratory Diseases (CIBERES), Spain
| |
Collapse
|
95
|
Irvine KA, Clark JD. Chronic Pain After Traumatic Brain Injury: Pathophysiology and Pain Mechanisms. PAIN MEDICINE 2017; 19:1315-1333. [DOI: 10.1093/pm/pnx153] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Karen-Amanda Irvine
- Veterans Affairs Palo Alto Health Care System, Anesthesiology Service, Palo Alto, California
- Department of Anesthesiology, Pain and Perioperative Medicine, Stanford University School of Medicine, Stanford, California, USA
| | - J David Clark
- Veterans Affairs Palo Alto Health Care System, Anesthesiology Service, Palo Alto, California
- Department of Anesthesiology, Pain and Perioperative Medicine, Stanford University School of Medicine, Stanford, California, USA
| |
Collapse
|
96
|
Loris ZB, Hynton JR, Pieper AA, Dietrich WD. Beneficial Effects of Delayed P7C3-A20 Treatment After Transient MCAO in Rats. Transl Stroke Res 2017; 9:146-156. [PMID: 28842830 DOI: 10.1007/s12975-017-0565-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Revised: 08/10/2017] [Accepted: 08/11/2017] [Indexed: 01/15/2023]
Abstract
Despite ischemic stroke being the fifth leading cause of death in the USA, there are few therapeutic options available. We recently showed that the neuroprotective compound P7C3-A20 reduced brain atrophy, increased neurogenesis, and improved functional recovery when treatment was initiated immediately post-reperfusion after a 90-min middle cerebral artery occlusion (MCAO). In the present study, we investigated a more clinically relevant therapeutic window for P7C3-A20 treatment after ischemic stroke. MCAO rats were administered P7C3-A20 for 1 week, beginning immediately or at a delayed point, 6 h post-reperfusion. Delayed P7C3-A20 treatment significantly improved stroke-induced sensorimotor deficits in motor coordination and symmetry, as well as cognitive deficits in hippocampal-dependent spatial learning, memory retention, and working memory. In the cerebral cortex, delayed P7C3-A20 treatment significantly increased tissue sparing 7 weeks after stroke and reduced hemispheric infarct volumes 48 h after reperfusion. Despite no reduction in striatal infarct volumes acutely, there was a significant increase in spared tissue volume chronically. In the hippocampus, only immediately treated P7C3-A20 animals had a significant increase in tissue sparing compared to vehicle-treated stroke animals. This structural protection translated into minimal hippocampal-dependent behavioral improvements with delayed P7C3-A20 treatment. However, all rats treated with delayed P7C3-A20 demonstrated a significant improvement in both sensorimotor tasks compared to vehicle controls, suggesting a somatosensory-driven recovery. These results demonstrate that P7C3-A20 improves chronic functional and histopathological outcomes after ischemic stroke with an extended therapeutic window.
Collapse
Affiliation(s)
- Zachary B Loris
- Department of Neurological Surgery, Neuroscience Program, University of Miami Miller School of Medicine, Miami, FL, USA.,The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Justin R Hynton
- Department of Neurological Surgery, Neuroscience Program, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Andrew A Pieper
- Department of Psychiatry, College of Medicine, University of Iowa Carver College of Medicine, 169 Newton Road, Iowa City, IA, 52242, USA. .,Department of Neurology, University of Iowa Carver College of Medicine, 169 Newton Road, Iowa City, IA, 52242, USA. .,Department of Free Radical and Radiation Biology Program, Department of Radiation Oncology Comprehensive Cancer Center, Department of Veterans Affairs, University of Iowa Carver College of Medicine, 169 Newton Road, Iowa City, IA, 52242, USA.
| | - W Dalton Dietrich
- Department of Neurological Surgery, Neuroscience Program, University of Miami Miller School of Medicine, Miami, FL, USA. .,The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, FL, USA. .,Department of Neurological Surgery, University of Miami, Leonard M. Miller School of Medicine, 1095 NW 14th Terrace, Suite 2-30, Miami, FL, 33136-1060, USA.
| |
Collapse
|
97
|
Interfering with the Chronic Immune Response Rescues Chronic Degeneration After Traumatic Brain Injury. J Neurosci 2017; 36:9962-75. [PMID: 27656033 DOI: 10.1523/jneurosci.1898-15.2016] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2015] [Accepted: 08/11/2016] [Indexed: 11/21/2022] Open
Abstract
UNLABELLED After traumatic brain injury (TBI), neurons surviving the initial insult can undergo chronic (secondary) degeneration via poorly understood mechanisms, resulting in long-term cognitive impairment. Although a neuroinflammatory response is promptly activated after TBI, it is unknown whether it has a significant role in chronic phases of TBI (>1 year after injury). Using a closed-head injury model of TBI in mice, we showed by MRI scans that TBI caused substantial degeneration at the lesion site within a few weeks and these did not expand significantly thereafter. However, chronic alterations in neurons were observed, with reduced dendritic spine density lasting >1 year after injury. In parallel, we found a long-lasting inflammatory response throughout the entire brain. Deletion of one allele of CX3CR1, a chemokine receptor, limited infiltration of peripheral immune cells and largely prevented the chronic degeneration of the injured brain and provided a better functional recovery in female, but not male, mice. Therefore, targeting persistent neuroinflammation presents a new therapeutic option to reduce chronic neurodegeneration. SIGNIFICANCE STATEMENT Traumatic brain injury (TBI) often causes chronic neurological problems including epilepsy, neuropsychiatric disorders, and dementia through unknown mechanisms. Our study demonstrates that inflammatory cells invading the brain lead to secondary brain damage. Sex-specific amelioration of chronic neuroinflammation rescues the brain degeneration and results in improved motor functions. Therefore, this study pinpoints an effective therapeutic approach to preventing secondary complications after TBI.
Collapse
|
98
|
Mokhtari M, Nayeb-Aghaei H, Kouchek M, Miri MM, Goharani R, Amoozandeh A, Akhavan Salamat S, Sistanizad M. Effect of Memantine on Serum Levels of Neuron-Specific Enolase and on the Glasgow Coma Scale in Patients With Moderate Traumatic Brain Injury. J Clin Pharmacol 2017; 58:42-47. [PMID: 28724200 DOI: 10.1002/jcph.980] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Accepted: 06/19/2017] [Indexed: 12/31/2022]
Abstract
Traumatic brain injury (TBI) is a major cause of disability and death globally. Despite significant progress in neuromonitoring and neuroprotection, pharmacological interventions have failed to generate favorable results. We examined the effect of memantine on serum levels of neuron-specific enolase (NSE), a marker of neuronal damage, and the Glasgow Coma Scale (GCS) in patients with moderate TBI. Patients were randomly assigned to the control group (who received standard TBI management) and the treatment group (who, alongside their standard management, received enteral memantine 30 mg twice daily for 7 days). Patients' clinical data, GCS, findings of head computed tomography, and serum NSE levels were collected during the study. Forty-one patients were randomized into the control and treatment groups, 19 and 22 patients respectively. Baseline characteristics and serum NSE levels were not significantly different between the 2 groups. The mean serum NSE levels for the memantine and the control groups on day 3 were 7.95 ± 2.86 and 12.33 ± 7.09 ng/mL, respectively (P = .05), and on day 7 were 5.03 ± 3.25 and 10.04 ± 5.72 ng/mL, respectively (P = .003). The mean GCS on day 3 was 12.3 ± 2.0 and 10.9 ± 1.9 in the memantine and control groups, respectively (P = .03). Serum NSE levels and GCS changes were negatively correlated (r = -0.368, P = .02). Patients with moderate TBI who received memantine had significantly reduced serum NSE levels by day 7 and marked improvement in their GCS scores on day 3 of the study.
Collapse
Affiliation(s)
- Majid Mokhtari
- Department of Critical Care and Anesthesiology, Imam Hossein Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hossein Nayeb-Aghaei
- Department of Neurosurgery, Imam Hossein Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mehran Kouchek
- Department of Critical Care and Anesthesiology, Imam Hossein Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mir Mohammad Miri
- Department of Critical Care and Anesthesiology, Imam Hossein Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Reza Goharani
- Department of Critical Care and Anesthesiology, Imam Hossein Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Arash Amoozandeh
- Department of Neurosurgery, Imam Hossein Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Sina Akhavan Salamat
- Department of Clinical Pharmacy, Faculty of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Sistanizad
- Department of Critical Care and Anesthesiology, Imam Hossein Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Department of Clinical Pharmacy, Faculty of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| |
Collapse
|
99
|
Perez EJ, Tapanes SA, Loris ZB, Balu DT, Sick TJ, Coyle JT, Liebl DJ. Enhanced astrocytic d-serine underlies synaptic damage after traumatic brain injury. J Clin Invest 2017; 127:3114-3125. [PMID: 28714867 DOI: 10.1172/jci92300] [Citation(s) in RCA: 85] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Accepted: 05/26/2017] [Indexed: 01/09/2023] Open
Abstract
After traumatic brain injury (TBI), glial cells have both beneficial and deleterious roles in injury progression and recovery. However, few studies have examined the influence of reactive astrocytes in the tripartite synapse following TBI. Here, we have demonstrated that hippocampal synaptic damage caused by controlled cortical impact (CCI) injury in mice results in a switch from neuronal to astrocytic d-serine release. Under nonpathological conditions, d-serine functions as a neurotransmitter and coagonist for NMDA receptors and is involved in mediating synaptic plasticity. The phasic release of neuronal d-serine is important in maintaining synaptic function, and deficiencies lead to reductions in synaptic function and plasticity. Following CCI injury, hippocampal neurons downregulated d-serine levels, while astrocytes enhanced production and release of d-serine. We further determined that this switch in the cellular source of d-serine, together with the release of basal levels of glutamate, contributes to synaptic damage and dysfunction. Astrocyte-specific elimination of the astrocytic d-serine-synthesizing enzyme serine racemase after CCI injury improved synaptic plasticity, brain oscillations, and learning behavior. We conclude that the enhanced tonic release of d-serine from astrocytes after TBI underlies much of the synaptic damage associated with brain injury.
Collapse
Affiliation(s)
- Enmanuel J Perez
- The Miami Project to Cure Paralysis, Department of Neurosurgery, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Stephen A Tapanes
- The Miami Project to Cure Paralysis, Department of Neurosurgery, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Zachary B Loris
- The Miami Project to Cure Paralysis, Department of Neurosurgery, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Darrick T Balu
- Translational Psychiatry Laboratory, McLean Hospital, Belmont, Massachusetts, USA
| | - Thomas J Sick
- Department of Neurology, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Joseph T Coyle
- Laboratory of Psychiatric and Molecular Neuroscience, McLean Hospital, Belmont, Massachusetts, USA
| | - Daniel J Liebl
- The Miami Project to Cure Paralysis, Department of Neurosurgery, University of Miami Miller School of Medicine, Miami, Florida, USA
| |
Collapse
|
100
|
Wright DK, Johnston LA, Kershaw J, Ordidge R, O'Brien TJ, Shultz SR. Changes in Apparent Fiber Density and Track-Weighted Imaging Metrics in White Matter following Experimental Traumatic Brain Injury. J Neurotrauma 2017; 34:2109-2118. [DOI: 10.1089/neu.2016.4730] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Affiliation(s)
- David K. Wright
- Anatomy and Neuroscience, The University of Melbourne, Parkville, VIC, Australia
- The Florey Institute of Neuroscience and Mental Health, Parkville, VIC, Australia
| | - Leigh A. Johnston
- The Florey Institute of Neuroscience and Mental Health, Parkville, VIC, Australia
- Department of Electrical & Electronic Engineering, The University of Melbourne, Parkville, VIC, Australia
| | - Jeff Kershaw
- Applied MRI Research, National Institute of Radiological Sciences, QST, Chiba, Japan
| | - Roger Ordidge
- Anatomy and Neuroscience, The University of Melbourne, Parkville, VIC, Australia
| | - Terence J. O'Brien
- Department of Medicine, The Royal Melbourne Hospital, The University of Melbourne, Parkville, VIC, Australia
| | - Sandy R. Shultz
- Department of Medicine, The Royal Melbourne Hospital, The University of Melbourne, Parkville, VIC, Australia
| |
Collapse
|