51
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Neuroprotection of minocycline by inhibition of extracellular matrix metalloproteinase inducer expression following intracerebral hemorrhage in mice. Neurosci Lett 2021; 764:136297. [PMID: 34666120 DOI: 10.1016/j.neulet.2021.136297] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Revised: 09/30/2021] [Accepted: 10/13/2021] [Indexed: 12/25/2022]
Abstract
Intracerebral hemorrhage (ICH) is a severe neurological dysfunction and a medical emergency with a high mortality rate. Minocycline ameliorates deficits in rodent models of acute and chronic neurological diseases. However, the role of minocycline in ICH remains unclear. The extracellular matrix metalloproteinase inducer (EMMPRIN) is a key inflammatory mediator in some neurological diseases, triggering matrix metalloproteinases (MMPs) production. In this study, we aimed to use minocycline to inhibit EMMPRIN and thus the activity of MMPs. Male adult C57BL/6 mice were injected with collagenase type VII or saline into the right basal ganglia and euthanized at different time points. The minocycline was intraperitoneally injected once every 12 h for three days to block the expression of EMMPRIN from two hours after ICH. We found that breakdown of the BBB was most severe 3 days after ICH. The minocycline treatment significantly decreased EMMPRIN and MMP-9 expression, reduced zonula occludens-1 and occludin, and alleviated BBB disruption. Moreover, minocycline treatment displayed a lower brain water content, lesser neurological dysfunction, and smaller injury volume on day 3 than those of the vehicle-treated group. Minocycline also inhibited the activation of microglia/macrophages, infiltration of neutrophils, and production of inflammatory mediators, including tumor necrosis factor alpha and interleukin-1beta. The current study shows that minocycline exhibits protective roles in ICH by decreasing EMMPRIN and MMP-9 expression, alleviating BBB disruption, inhibiting neuroinflammation, areducing neuronal degeneration and death.
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52
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Central Nervous System Tissue Regeneration after Intracerebral Hemorrhage: The Next Frontier. Cells 2021; 10:cells10102513. [PMID: 34685493 PMCID: PMC8534252 DOI: 10.3390/cells10102513] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 09/13/2021] [Accepted: 09/17/2021] [Indexed: 12/11/2022] Open
Abstract
Despite marked advances in surgical techniques and understanding of secondary brain injury mechanisms, the prognosis of intracerebral hemorrhage (ICH) remains devastating. Harnessing and promoting the regenerative potential of the central nervous system may improve the outcomes of patients with hemorrhagic stroke, but approaches are still in their infancy. In this review, we discuss the regenerative phenomena occurring in animal models and human ICH, provide results related to cellular and molecular mechanisms of the repair process including by microglia, and review potential methods to promote tissue regeneration in ICH. We aim to stimulate research involving tissue restoration after ICH.
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53
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Xiao H, Liu J, He J, Lan Z, Deng M, Hu Z. 17β-Estradiol Attenuates Intracerebral Hemorrhage-Induced Blood-Brain Barrier Injury and Oxidative Stress Through SRC3-Mediated PI3K/Akt Signaling Pathway in a Mouse Model. ASN Neuro 2021; 13:17590914211038443. [PMID: 34491125 PMCID: PMC8580490 DOI: 10.1177/17590914211038443] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Estrogen is neuroprotective in brain injury models, and steroid receptor cofactor 3 (SRC3) mediates estrogen signaling. We aimed to investigate whether and how SRC3 is involved in the neuroprotective effects of 17ß-estradiol (E2) in a mouse model of intracerebral hemorrhage (ICH). Ovariectomized female mice were treated with E2 after autologous blood injection-induced ICH. Brain damage was assessed by neurological deficit score, brain water content, and oxidative stress levels. Blood–brain barrier (BBB) integrity was evaluated by Evan's blue extravasation and claudin-5, ZO-1, and occludin levels. SRC3 expression and PI3K/Akt signaling pathway were examined in ICH mice treated with E2. The effect of SRC3 on E2-mediated neuroprotection was determined by examining neurological outcomes in SRC3-deficient mice undergone ICH and E2 treatment. We found that E2 alleviated ICH-induced brain edema and neurological deficits, protected BBB integrity, and suppressed oxidative stress. E2 enhanced SRC3 expression and PI3K-/Akt signaling pathway. SRC3 deficiency abolished the protective effects of E2 on ICH-induced neurological deficits, brain edema, and BBB integrity. Our results suggest that E2 suppresses ICH-induced brain injury and SRC3 plays a critical role in E2-mediated neuroprotection.
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Affiliation(s)
- Han Xiao
- Department of Neurology, the Second Xiangya Hospital, Central South University, Changsha, China
| | - Jianyang Liu
- Department of Neurology, the Second Xiangya Hospital, Central South University, Changsha, China
| | - Jialin He
- Department of Neurology, the Second Xiangya Hospital, Central South University, Changsha, China
| | - Ziwei Lan
- Department of Neurology, the Second Xiangya Hospital, Central South University, Changsha, China
| | - Mingyang Deng
- Department of Hematology, the Second Xiangya Hospital, Central South University, Changsha, China
| | - Zhiping Hu
- Department of Neurology, the Second Xiangya Hospital, Central South University, Changsha, China
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54
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Ashouri R, Fangman M, Brielmaier J, Fields ZA, Campo N, Doré S. Nutritional Supplementation of Naturally Occurring Vitamin D to Improve Hemorrhagic Stroke Outcomes. Front Neurol 2021; 12:670245. [PMID: 34393969 PMCID: PMC8363078 DOI: 10.3389/fneur.2021.670245] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Accepted: 06/10/2021] [Indexed: 12/29/2022] Open
Abstract
Vitamin D deficiency, if left untreated, is associated with bone disorders, cardiovascular damage, and an increased risk of ischemic stroke. While there are various nutritional options for the natural intake of vitamin D, we hope to elucidate the potential mechanisms dietary vitamin D may play in hemorrhagic stroke pathology. This scoping review outlines findings from studies relevant to the biochemical activity of vitamin D, the impact of vitamin D deficiency on hemorrhagic stroke outcomes, and the potential benefit of nutritional vitamin D on hemorrhagic stroke outcomes. Here, we analyze the relevant factors that can lead to vitamin D deficiency, and subsequently, a higher risk of hemorrhagic stroke incidence with worsened subsequent outcomes. The neuroprotective mechanisms through which vitamin D works to attenuate hemorrhagic stroke onset and post-stroke outcomes have not yet been thoroughly examined. However, researchers have proposed several potential protective mechanisms, including reduction of blood brain barrier disturbance by inhibiting the production of reactive oxygen species, mitigation of inflammation through a reduction of levels of proinflammatory cytokines, and prevention of cerebral vasospasm and delayed cerebral ischemia following subarachnoid hemorrhage and intracerebral hemorrhage. While more research is needed and there are limitations to vitamin D supplementation, vitamin D as a whole may play a significant role in the dynamics of hemorrhagic stroke. Further research should focus on expanding our understanding of the neuroprotective capacity and mechanisms of vitamin D, as well as how vitamin D supplementation could serve as an effective course of treatment of hemorrhagic strokes.
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Affiliation(s)
- Rani Ashouri
- Department of Anesthesiology, University of Florida College of Medicine, University of Florida, Gainesville, FL, United States
| | - Madison Fangman
- Department of Anesthesiology, University of Florida College of Medicine, University of Florida, Gainesville, FL, United States
| | - Jordan Brielmaier
- Department of Anesthesiology, University of Florida College of Medicine, University of Florida, Gainesville, FL, United States
| | - Zoe A. Fields
- Department of Anesthesiology, University of Florida College of Medicine, University of Florida, Gainesville, FL, United States
| | - Natalie Campo
- Department of Anesthesiology, University of Florida College of Medicine, University of Florida, Gainesville, FL, United States
| | - Sylvain Doré
- Department of Anesthesiology, University of Florida College of Medicine, University of Florida, Gainesville, FL, United States
- Departments of Psychiatry, Pharmaceutics, Psychology, and Neuroscience, Center for Translational Research in Neurodegenerative Disease, McKnight Brain Institute, University of Florida, Gainesville, FL, United States
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55
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Li M, Ke J, Deng Y, Chen C, Huang Y, Bian Y, Guo S, Wu Y, Zhang H, Liu M, Han Y. The Protective Effect of Liquiritin in Hypoxia/Reoxygenation-Induced Disruption on Blood Brain Barrier. Front Pharmacol 2021; 12:671783. [PMID: 34295249 PMCID: PMC8290897 DOI: 10.3389/fphar.2021.671783] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 04/19/2021] [Indexed: 12/14/2022] Open
Abstract
Background: Stroke is the second leading cause of death in human life health, but current treatment strategies are limited to thrombolytic therapy, and because of the tight time window, many contraindications, and only a very small number of people can benefit from it, new therapeutic strategies are needed to solve this problem. As a physical barrier between the central nervous system and blood, the blood-brain barrier (BBB) maintains the homeostasis of the central nervous system. Maintaining the integrity of the BBB may emerge as a new therapeutic strategy. Liquiritin (LQ) is a flavonoid isolated from the medicinal plant Glycyrrhiza uralensis Fisch. ex DC. (Fabaceae), and this study aims to investigate the protective effects of LQ on brain microvascular endothelial cells (BMECs), to provide a new therapeutic strategy for stroke treatment, and also to provide research ideas for the development of traditional Chinese medicine (TCM). Methods: The protective effects of LQ on HBMECs under the treatment of hypoxia reoxygenation (H/R) were investigated from different aspects by establishing a model of H/R injury to mimic ischemia-reperfusion in vivo while administrating different concentrations of LQ, which includes: cell proliferation, migration, angiogenesis, mitochondrial membrane potential as well as apoptosis. Meanwhile, the mechanism of LQ to protect the integrity of BBB by antioxidation and inhibiting endoplasmic reticulum (ER) stress was also investigated. Finally, to search for possible targets of LQ, a proteomic analysis approach was employed. Results: LQ can promote cell proliferation, migration as well as angiogenesis and reduce mitochondrial membrane potential damage and apoptosis. Meanwhile, LQ can also reduce the expression of related adhesion molecules, and decrease the production of reactive oxygen species. In terms of mechanism study, we demonstrated that LQ could activate Keap1/Nrf2 antioxidant pathway, inhibit ER stress, and maintain the integrity of BBB. Through differential protein analysis, 5 disease associated proteins were found. Conclusions: Studies have shown that LQ can promote cell proliferation, migration as well as angiogenesis, and reduce cell apoptosis, which may be related to its inhibition of oxidative and ER stress, and then maintain the integrity of BBB. Given that five differential proteins were found by protein analysis, future studies will revolve around the five differential proteins.
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Affiliation(s)
- Mengting Li
- Department of Neurology, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Jia Ke
- Department of Neurology, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yiqing Deng
- Institute of Interdisciplinary Integrative Biomedicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Chunxiang Chen
- Department of Neurology, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yichen Huang
- Department of Neurology, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yuefeng Bian
- Department of Neurology, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Shufen Guo
- Department of Neurology, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yang Wu
- Department of Neurology, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Hong Zhang
- Institute of Interdisciplinary Integrative Biomedicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Mingyuan Liu
- Department of Neurology, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yan Han
- Department of Neurology, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
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56
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Lule S, Wu L, Sarro-Schwartz A, Edmiston WJ, Izzy S, Songtachalert T, Ahn SH, Fernandes ND, Jin G, Chung JY, Balachandran S, Lo EH, Kaplan D, Degterev A, Whalen MJ. Cell-specific activation of RIPK1 and MLKL after intracerebral hemorrhage in mice. J Cereb Blood Flow Metab 2021; 41:1623-1633. [PMID: 33210566 PMCID: PMC8221773 DOI: 10.1177/0271678x20973609] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Receptor-interacting protein kinase-1 (RIPK1) is a master regulator of cell death and inflammation, and mediates programmed necrosis (necroptosis) via mixed-lineage kinase like (MLKL) protein. Prior studies in experimental intracerebral hemorrhage (ICH) implicated RIPK1 in the pathogenesis of neuronal death and cognitive outcome, but the relevant cell types involved and potential role of necroptosis remain unexplored. In mice subjected to autologous blood ICH, early RIPK1 activation was observed in neurons, endothelium and pericytes, but not in astrocytes. MLKL activation was detected in astrocytes and neurons but not endothelium or pericytes. Compared with WT controls, RIPK1 kinase-dead (RIPK1D138N/D138N) mice had reduced brain edema (24 h) and blood-brain barrier (BBB) permeability (24 h, 30 d), and improved postinjury rotarod performance. Mice deficient in MLKL (Mlkl-/-) had reduced neuronal death (24 h) and BBB permeability at 24 h but not 30d, and improved post-injury rotarod performance vs. WT. The data support a central role for RIPK1 in the pathogenesis of ICH, including cell death, edema, BBB permeability, and motor deficits. These effects may be mediated in part through the activation of MLKL-dependent necroptosis in neurons. The data support development of RIPK1 kinase inhibitors as therapeutic agents for human ICH.
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Affiliation(s)
- Sevda Lule
- Department of Pediatrics, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, USA
| | - Limin Wu
- Department of Pediatrics, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, USA
| | - Aliyah Sarro-Schwartz
- Department of Neurology, Brigham and Woman's Hospital, Harvard Medical School, Boston, MA, USA
| | - William J Edmiston
- Department of Pediatrics, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, USA
| | - Saef Izzy
- Department of Neurology, Brigham and Woman's Hospital, Harvard Medical School, Boston, MA, USA
| | - Tanya Songtachalert
- Department of Pediatrics, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, USA
| | - So Hee Ahn
- Department of Pediatrics, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, USA
| | - Neil D Fernandes
- Department of Pediatrics, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, USA
| | - Gina Jin
- Department of Pediatrics, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, USA
| | - Joon Yong Chung
- Department of Pediatrics, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, USA
| | - Siddharth Balachandran
- Blood Cell Development and Function Program, Fox Chase Cancer Center, Philadelphia, PA, USA
| | - Eng H Lo
- Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, USA.,Department of Neurology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, USA
| | - David Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, MA, USA
| | - Alexei Degterev
- Department of Developmental, Molecular and Chemical Biology, Tufts University School of Medicine, Boston, MA, USA
| | - Michael J Whalen
- Department of Pediatrics, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, USA
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57
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Carmona-Mora P, Ander BP, Jickling GC, Dykstra-Aiello C, Zhan X, Ferino E, Hamade F, Amini H, Hull H, Sharp FR, Stamova B. Distinct peripheral blood monocyte and neutrophil transcriptional programs following intracerebral hemorrhage and different etiologies of ischemic stroke. J Cereb Blood Flow Metab 2021; 41:1398-1416. [PMID: 32960689 PMCID: PMC8142129 DOI: 10.1177/0271678x20953912] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 07/07/2020] [Accepted: 07/29/2020] [Indexed: 12/25/2022]
Abstract
Understanding cell-specific transcriptome responses following intracerebral hemorrhage (ICH) and ischemic stroke (IS) will improve knowledge of the immune response to brain injury. Transcriptomic profiles of 141 samples from 48 subjects with ICH, different IS etiologies, and vascular risk factor controls were characterized using RNA-seq in isolated neutrophils, monocytes and whole blood. In both IS and ICH, monocyte genes were down-regulated, whereas neutrophil gene expression changes were generally up-regulated. The monocyte down-regulated response to ICH included innate, adaptive immune, dendritic, NK cell and atherosclerosis signaling. Neutrophil responses to ICH included tRNA charging, mitochondrial dysfunction, and ER stress pathways. Common monocyte and neutrophil responses to ICH included interferon signaling, neuroinflammation, death receptor signaling, and NFAT pathways. Suppressed monocyte responses to IS included interferon and dendritic cell maturation signaling, phagosome formation, and IL-15 signaling. Activated neutrophil responses to IS included oxidative phosphorylation, mTOR, BMP, growth factor signaling, and calpain proteases-mediated blood-brain barrier (BBB) dysfunction. Common monocyte and neutrophil responses to IS included JAK1, JAK3, STAT3, and thrombopoietin signaling. Cell-type and cause-specific approaches will assist the search for future IS and ICH biomarkers and treatments.
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Affiliation(s)
- Paulina Carmona-Mora
- Department of Neurology, School of Medicine, University of California, Davis, Sacramento, CA, USA
| | - Bradley P Ander
- Department of Neurology, School of Medicine, University of California, Davis, Sacramento, CA, USA
| | - Glen C Jickling
- Department of Neurology, School of Medicine, University of California, Davis, Sacramento, CA, USA
- Department of Medicine, University of Alberta, Edmonton, Canada
| | - Cheryl Dykstra-Aiello
- Department of Neurology, School of Medicine, University of California, Davis, Sacramento, CA, USA
| | - Xinhua Zhan
- Department of Neurology, School of Medicine, University of California, Davis, Sacramento, CA, USA
| | - Eva Ferino
- Department of Neurology, School of Medicine, University of California, Davis, Sacramento, CA, USA
| | - Farah Hamade
- Department of Neurology, School of Medicine, University of California, Davis, Sacramento, CA, USA
| | - Hajar Amini
- Department of Neurology, School of Medicine, University of California, Davis, Sacramento, CA, USA
| | - Heather Hull
- Department of Neurology, School of Medicine, University of California, Davis, Sacramento, CA, USA
| | - Frank R Sharp
- Department of Neurology, School of Medicine, University of California, Davis, Sacramento, CA, USA
| | - Boryana Stamova
- Department of Neurology, School of Medicine, University of California, Davis, Sacramento, CA, USA
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58
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Shakkour Z, Issa H, Ismail H, Ashekyan O, Habashy KJ, Nasrallah L, Jourdi H, Hamade E, Mondello S, Sabra M, Zibara K, Kobeissy F. Drug Repurposing: Promises of Edaravone Target Drug in Traumatic Brain Injury. Curr Med Chem 2021; 28:2369-2391. [PMID: 32787753 DOI: 10.2174/0929867327666200812221022] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Revised: 06/09/2020] [Accepted: 06/11/2020] [Indexed: 11/22/2022]
Abstract
Edaravone is a potent free-radical scavenger that has been in the market for more than 30 years. It was originally developed in Japan to treat strokes and has been used there since 2001. Aside from its anti-oxidative effects, edaravone demonstrated beneficial effects on proinflammatory responses, nitric oxide production, and apoptotic cell death. Interestingly, edaravone has shown neuroprotective effects in several animal models of diseases other than stroke. In particular, edaravone administration was found to be effective in halting amyotrophic lateral sclerosis (ALS) progression during the early stages. Accordingly, after its success in Phase III clinical studies, edaravone has been approved by the FDA as a treatment for ALS patients. Considering its promises in neurological disorders and its safety in patients, edaravone is a drug of interest that can be repurposed for traumatic brain injury (TBI) treatment. Drug repurposing is a novel approach in drug development that identifies drugs for purposes other than their original indication. This review presents the biochemical properties of edaravone along with its effects on several neurological disorders in the hope that it can be adopted for treating TBI patients.
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Affiliation(s)
- Zaynab Shakkour
- American University of Beirut, Faculty of Medicine, Department of Biochemistry and Molecular Genetics, Beirut, Lebanon
| | - Hawraa Issa
- PRASE and Biology Department, Faculty of Sciences - I, Lebanese University, Beirut, Lebanon
| | - Helene Ismail
- American University of Beirut, Faculty of Medicine, Department of Biochemistry and Molecular Genetics, Beirut, Lebanon
| | - Ohanes Ashekyan
- American University of Beirut, Faculty of Medicine, Department of Biochemistry and Molecular Genetics, Beirut, Lebanon
| | - Karl John Habashy
- Faculty of Medicine, American, University of Beirut, Beirut, Lebanon
| | - Leila Nasrallah
- American University of Beirut, Faculty of Medicine, Department of Biochemistry and Molecular Genetics, Beirut, Lebanon
| | - Hussam Jourdi
- Biology & Environmental Sciences Division at University of Balamand, Souk El Gharb, Aley, Lebanon
| | - Eva Hamade
- PRASE and Biology Department, Faculty of Sciences - I, Lebanese University, Beirut, Lebanon
| | - Stefania Mondello
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, Messina, Italy
| | - Mirna Sabra
- Faculty of Medicine, Lebanese University, Neuroscience Research Center (NRC), Beirut, Lebanon
| | - Kazem Zibara
- PRASE and Biology Department, Faculty of Sciences - I, Lebanese University, Beirut, Lebanon
| | - Firas Kobeissy
- American University of Beirut, Faculty of Medicine, Department of Biochemistry and Molecular Genetics, Beirut, Lebanon
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59
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Girard R, Li Y, Stadnik A, Shenkar R, Hobson N, Romanos S, Srinath A, Moore T, Lightle R, Shkoukani A, Akers A, Carroll T, Christoforidis GA, Koenig JI, Lee C, Piedad K, Greenberg SM, Kim H, Flemming KD, Ji Y, Awad IA. A Roadmap for Developing Plasma Diagnostic and Prognostic Biomarkers of Cerebral Cavernous Angioma With Symptomatic Hemorrhage (CASH). Neurosurgery 2021; 88:686-697. [PMID: 33469662 DOI: 10.1093/neuros/nyaa478] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 08/16/2020] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND Cerebral cavernous angioma (CA) is a capillary microangiopathy predisposing more than a million Americans to premature risk of brain hemorrhage. CA with recent symptomatic hemorrhage (SH), most likely to re-bleed with serious clinical sequelae, is the primary focus of therapeutic development. Signaling aberrations in CA include proliferative dysangiogenesis, blood-brain barrier hyperpermeability, inflammatory/immune processes, and anticoagulant vascular domain. Plasma levels of molecules reflecting these mechanisms and measures of vascular permeability and iron deposition on magnetic resonance imaging are biomarkers that have been correlated with CA hemorrhage. OBJECTIVE To optimize these biomarkers to accurately diagnose cavernous angioma with symptomatic hemorrhage (CASH), prognosticate the risk of future SH, and monitor cases after a bleed and in response to therapy. METHODS Additional candidate biomarkers, emerging from ongoing mechanistic and differential transcriptome studies, would further enhance the sensitivity and specificity of diagnosis and prediction of CASH. Integrative combinations of levels of plasma proteins and characteristic micro-ribonucleic acids may further strengthen biomarker associations. We will deploy advanced statistical and machine learning approaches for the integration of novel candidate biomarkers, rejecting noncorrelated candidates, and determining the best clustering and weighing of combined biomarker contributions. EXPECTED OUTCOMES With the expertise of leading CA researchers, this project anticipates the development of future blood tests for the diagnosis and prediction of CASH to clinically advance towards precision medicine. DISCUSSION The project tests a novel integrational approach of biomarker development in a mechanistically defined cerebrovascular disease with a relevant context of use, with an approach applicable to other neurological diseases with similar pathobiologic features.
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Affiliation(s)
- Romuald Girard
- Neurovascular Surgery Program, Department of Surgery, Section of Neurosurgery, University of Chicago Medicine and Biological Sciences, Chicago, Illinois
| | - Yan Li
- Neurovascular Surgery Program, Department of Surgery, Section of Neurosurgery, University of Chicago Medicine and Biological Sciences, Chicago, Illinois.,Bioinformatics core, Center for Research Informatics, University of Chicago, Chicago, Illinois
| | - Agnieszka Stadnik
- Neurovascular Surgery Program, Department of Surgery, Section of Neurosurgery, University of Chicago Medicine and Biological Sciences, Chicago, Illinois
| | - Robert Shenkar
- Neurovascular Surgery Program, Department of Surgery, Section of Neurosurgery, University of Chicago Medicine and Biological Sciences, Chicago, Illinois
| | - Nicholas Hobson
- Neurovascular Surgery Program, Department of Surgery, Section of Neurosurgery, University of Chicago Medicine and Biological Sciences, Chicago, Illinois
| | - Sharbel Romanos
- Neurovascular Surgery Program, Department of Surgery, Section of Neurosurgery, University of Chicago Medicine and Biological Sciences, Chicago, Illinois
| | - Abhinav Srinath
- Neurovascular Surgery Program, Department of Surgery, Section of Neurosurgery, University of Chicago Medicine and Biological Sciences, Chicago, Illinois
| | - Thomas Moore
- Neurovascular Surgery Program, Department of Surgery, Section of Neurosurgery, University of Chicago Medicine and Biological Sciences, Chicago, Illinois
| | - Rhonda Lightle
- Neurovascular Surgery Program, Department of Surgery, Section of Neurosurgery, University of Chicago Medicine and Biological Sciences, Chicago, Illinois
| | - Abdallah Shkoukani
- Neurovascular Surgery Program, Department of Surgery, Section of Neurosurgery, University of Chicago Medicine and Biological Sciences, Chicago, Illinois
| | | | - Timothy Carroll
- Department of Diagnostic Radiology, The University of Chicago Medicine and Biological Sciences, Chicago, Illinois
| | - Gregory A Christoforidis
- Department of Diagnostic Radiology, The University of Chicago Medicine and Biological Sciences, Chicago, Illinois
| | - James I Koenig
- National Institute of Neurological Disorders and Stroke, Bethesda, Maryland
| | | | - Kristina Piedad
- Neurovascular Surgery Program, Department of Surgery, Section of Neurosurgery, University of Chicago Medicine and Biological Sciences, Chicago, Illinois
| | - Steven M Greenberg
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Helen Kim
- Department of Anesthesia & Perioperative Care, University of California at San Francisco, San Francisco, California
| | | | - Yuan Ji
- Department of Public Health Sciences, University of Chicago, Chicago, Illinois
| | - Issam A Awad
- Neurovascular Surgery Program, Department of Surgery, Section of Neurosurgery, University of Chicago Medicine and Biological Sciences, Chicago, Illinois
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60
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Chen J, Wang L, Xu H, Wang Y, Liang Q. The lymphatic drainage system of the CNS plays a role in lymphatic drainage, immunity, and neuroinflammation in stroke. J Leukoc Biol 2021; 110:283-291. [PMID: 33884651 DOI: 10.1002/jlb.5mr0321-632r] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Revised: 03/19/2021] [Accepted: 03/26/2021] [Indexed: 12/31/2022] Open
Abstract
The lymphatic drainage system of the central nervous system (CNS) plays an important role in maintaining interstitial fluid balance and regulating immune responses and immune surveillance. The impaired lymphatic drainage system of the CNS might be involved in the onset and progression of various neurodegenerative diseases, neuroinflammation, and cerebrovascular diseases. A significant immune response and brain edema are observed after stroke, resulting from disrupted homeostasis in the brain. Thus, understanding the lymphatic drainage system of the CNS in stroke may lead to the development of new approaches for therapeutic interventions in the future. Here, we review recent evidence implicating the lymphatic drainage system of the CNS in stroke.
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Affiliation(s)
- Jinman Chen
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Institute of Spine, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,School of Rehabilitation Science, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Key Laboratory of theory and therapy of muscles and bones, Ministry of Education (Shanghai University of Traditional Chinese Medicine), Shanghai, China
| | - Linmei Wang
- Department of Anatomy, School of Basic Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Hao Xu
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Institute of Spine, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Key Laboratory of theory and therapy of muscles and bones, Ministry of Education (Shanghai University of Traditional Chinese Medicine), Shanghai, China
| | - Yongjun Wang
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Institute of Spine, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,School of Rehabilitation Science, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Key Laboratory of theory and therapy of muscles and bones, Ministry of Education (Shanghai University of Traditional Chinese Medicine), Shanghai, China
| | - Qianqian Liang
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Institute of Spine, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Key Laboratory of theory and therapy of muscles and bones, Ministry of Education (Shanghai University of Traditional Chinese Medicine), Shanghai, China
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61
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Shu Y, Huang J, Gao M, Gan S, Zhu S, Xu S, Yang Z, Liao Y, Lu W. Small Interfering RNA Targeting DMP1 Protects Mice Against Blood-Brain Barrier Disruption and Brain Injury After Intracerebral Hemorrhage. J Stroke Cerebrovasc Dis 2021; 30:105760. [PMID: 33845422 DOI: 10.1016/j.jstrokecerebrovasdis.2021.105760] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 03/05/2021] [Accepted: 03/09/2021] [Indexed: 01/30/2023] Open
Abstract
Dentin matrix protein 1 (DMP1) is an extracellular matrix phosphoprotein that is known to facilitate mineralization of collagen in bone and promote osteoblast/odontoblast differentiation. Blood-brain barrier (BBB) disruption is the major pathogenesis in secondary brain injury after intracerebral hemorrhage (ICH). This study aimed to investigate the expression pattern of DMP1 in the mouse brain and explore the role of DMP1 in BBB disruption and brain injury in a mouse model of ICH. Mice were subjected to autologous blood injection-induced ICH. Immunofluorescence staining, western blot analysis, neurobehavioral tests, brain water content measurements, Evans blue permeability assay, and transmission electron microscopy were performed. Small interfering RNA targeting DMP1 (DMP1 siRNA) was administered at 72 h prior to ICH. Results showed that DMP1 is expressed extensively in the mouse brain, and is upregulated in the ICH model. Administration of DMP1 siRNA effectively ameliorated BBB disruption, attenuated brain edema, and improved neurological function after ICH. Moreover, the expression of zonula occludens-1 (ZO-1) and occludin were upregulated, and matrix metalloproteinase-9 (MMP-9) was downregulated in the ICH model. DMP1 siRNA administration reversed the expression of ZO-1, occludin, and MMP-9. These results demonstrated that DMP1 upregulation plays an essential role in inducing BBB disruption and brain injury after ICH. The inhibition of DMP1 could be a potential therapeutic strategy for ICH treatment.
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Affiliation(s)
- Yue Shu
- Department of Anatomy, Basic Medical College, Chongqing Medical University, Chongqing 400016, China; Institute of Neuroscience, Chongqing Medical University, Chongqing 400016, China.
| | - Juan Huang
- Department of Anatomy, Basic Medical College, Chongqing Medical University, Chongqing 400016, China; Institute of Neuroscience, Chongqing Medical University, Chongqing 400016, China.
| | - Meng Gao
- Department of Clinical Laboratory, 521 Hospital of Ordnance Industry, Xi'an 7100065, China.
| | - Shengwei Gan
- Department of Anatomy, Basic Medical College, Chongqing Medical University, Chongqing 400016, China; Institute of Neuroscience, Chongqing Medical University, Chongqing 400016, China.
| | - Shujuan Zhu
- Department of Anatomy, Basic Medical College, Chongqing Medical University, Chongqing 400016, China; Institute of Neuroscience, Chongqing Medical University, Chongqing 400016, China.
| | - Shiye Xu
- Department of Anatomy, Basic Medical College, Chongqing Medical University, Chongqing 400016, China; Institute of Neuroscience, Chongqing Medical University, Chongqing 400016, China.
| | - Zhengyu Yang
- Department of Anatomy, Basic Medical College, Chongqing Medical University, Chongqing 400016, China; Institute of Neuroscience, Chongqing Medical University, Chongqing 400016, China.
| | - Yuhui Liao
- Department of Anatomy, Basic Medical College, Chongqing Medical University, Chongqing 400016, China; Institute of Neuroscience, Chongqing Medical University, Chongqing 400016, China.
| | - Weitian Lu
- Department of Anatomy, Basic Medical College, Chongqing Medical University, Chongqing 400016, China; Institute of Neuroscience, Chongqing Medical University, Chongqing 400016, China.
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62
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Kawoos U, Abutarboush R, Gu M, Chen Y, Statz JK, Goodrich SY, Ahlers ST. Blast-induced temporal alterations in blood-brain barrier properties in a rodent model. Sci Rep 2021; 11:5906. [PMID: 33723300 PMCID: PMC7971015 DOI: 10.1038/s41598-021-84730-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Accepted: 02/09/2021] [Indexed: 01/07/2023] Open
Abstract
The consequences of blast-induced traumatic brain injury (bTBI) on the blood–brain barrier (BBB) and components of the neurovascular unit are an area of active research. In this study we assessed the time course of BBB integrity in anesthetized rats exposed to a single blast overpressure of 130 kPa (18.9 PSI). BBB permeability was measured in vivo via intravital microscopy by imaging extravasation of fluorescently labeled tracers (40 kDa and 70 kDa molecular weight) through the pial microvasculature into brain parenchyma at 2–3 h, 1, 3, 14, or 28 days after the blast exposure. BBB structural changes were assessed by immunostaining and molecular assays. At 2–3 h and 1 day after blast exposure, significant increases in the extravasation of the 40 kDa but not the 70 kDa tracers were observed, along with differential reductions in the expression of tight junction proteins (occludin, claudin-5, zona occluden-1) and increase in the levels of the astrocytic water channel protein, AQP-4, and matrix metalloprotease, MMP-9. Nearly all of these measures were normalized by day 3 and maintained up to 28 days post exposure. These data demonstrate that blast-induced changes in BBB permeability are closely coupled to structural and functional components of the BBB.
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Affiliation(s)
- Usmah Kawoos
- Neurotrauma Department, Naval Medical Research Center, 503 Robert Grant Ave, Silver Spring, MD, 20910, USA. .,The Henry M. Jackson Foundation for the Advancement of Military Medicine Inc, Bethesda, MD, USA.
| | - Rania Abutarboush
- Neurotrauma Department, Naval Medical Research Center, 503 Robert Grant Ave, Silver Spring, MD, 20910, USA.,The Henry M. Jackson Foundation for the Advancement of Military Medicine Inc, Bethesda, MD, USA
| | - Ming Gu
- Neurotrauma Department, Naval Medical Research Center, 503 Robert Grant Ave, Silver Spring, MD, 20910, USA.,The Henry M. Jackson Foundation for the Advancement of Military Medicine Inc, Bethesda, MD, USA
| | - Ye Chen
- Neurotrauma Department, Naval Medical Research Center, 503 Robert Grant Ave, Silver Spring, MD, 20910, USA.,The Henry M. Jackson Foundation for the Advancement of Military Medicine Inc, Bethesda, MD, USA
| | - Jonathan K Statz
- Neurotrauma Department, Naval Medical Research Center, 503 Robert Grant Ave, Silver Spring, MD, 20910, USA.,The Henry M. Jackson Foundation for the Advancement of Military Medicine Inc, Bethesda, MD, USA
| | - Samantha Y Goodrich
- Neurotrauma Department, Naval Medical Research Center, 503 Robert Grant Ave, Silver Spring, MD, 20910, USA.,The Henry M. Jackson Foundation for the Advancement of Military Medicine Inc, Bethesda, MD, USA
| | - Stephen T Ahlers
- Neurotrauma Department, Naval Medical Research Center, 503 Robert Grant Ave, Silver Spring, MD, 20910, USA
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63
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Bahadar GA, Shah ZA. Intracerebral Hemorrhage and Diabetes Mellitus: Blood-Brain Barrier Disruption, Pathophysiology, and Cognitive Impairments. CNS & NEUROLOGICAL DISORDERS-DRUG TARGETS 2021; 20:312-326. [PMID: 33622232 DOI: 10.2174/1871527320666210223145112] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 10/15/2020] [Accepted: 11/02/2020] [Indexed: 11/22/2022]
Abstract
There is a surge in diabetes incidence with an estimated 463 million individuals been diagnosed worldwide. Diabetes Mellitus (DM) is a major stroke-related comorbid condition that increases the susceptibility of disabling post-stroke outcomes. Although less common, intracerebral hemorrhage (ICH) is the most dramatic subtype of stroke that is associated with higher mortality, particularly in DM population. Previous studies have focused mainly on the impact of DM on ischemic stroke. Few studies have focused on impact of DM on ICH and discussed the blood-brain barrier disruption, brain edema, and hematoma formation. However, more recently, investigating the role of oxidative damage and reactive oxygen species (ROS) production in preclinical studies involving DM-ICH animal models has gained attention. But, little is known about the correlation between neuroinflammatory processes, glial cells activation, and peripheral immune cell invasion with DM-ICH injury. DM and ICH patients experience impaired abilities in multiple cognitive domains by relatively comparable mechanisms, which could get exacerbated in the setting of comorbidities. In this review, we discuss both the pathology of DM as a comorbid condition for ICH and the potential molecular therapeutic targets for the clinical management of the ICH and its recovery.
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Affiliation(s)
- Ghaith A Bahadar
- Department of Medicinal and Biological Chemistry, College of Pharmacy and Pharmaceutical Sciences, University of Toledo, Toledo, OH 43614. United States
| | - Zahoor A Shah
- Department of Medicinal and Biological Chemistry, College of Pharmacy and Pharmaceutical Sciences, University of Toledo, Toledo, OH 43614. United States
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64
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Shi Y, Chen X, Liu J, Fan X, Jin Y, Gu J, Liang J, Liang X, Wang C. Isoquercetin Improves Inflammatory Response in Rats Following Ischemic Stroke. Front Neurosci 2021; 15:555543. [PMID: 33633530 PMCID: PMC7900503 DOI: 10.3389/fnins.2021.555543] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 01/04/2021] [Indexed: 12/03/2022] Open
Abstract
Inflammatory response contributes to brain injury after ischemia and reperfusion (I/R). Our previous literature has shown isoquercetin plays an important role in protecting against cerebral I/R injury. The present study was conducted to further investigate the effect of isoquercetin on inflammation-induced neuronal injury in I/R rats with the involvement of cyclic adenosine monophosphate (cAMP)/protein kinase A (PKA) and inhibitor of NF-κB (I-κB)/nuclear factor-kappa B (NF-κB) signaling pathway mediated by Toll-like receptor 4 (TLR4) and C5a receptor 1 (C5aR1). In vivo middle cerebral artery occlusion and reperfusion (MCAO/R) rat model and in vitro oxygen-glucose deprivation and reperfusion (OGD/R) neuron model were used. MCAO/R induced neurological deficits, cell apoptosis, and release of cytokines such as tumor necrosis factor (TNF)-α, interleukin (IL)-1β, and IL-6 in ischemic brain in rats. Simultaneously, the expression of TLR4 and C5aR1 was significantly up-regulated in both MCAO/R rats and OGD/R neurons, accompanied with the inhibition of cAMP/PKA signaling and activation of I-κB/NF-κB signaling in the cortex of MCAO/R rats. Over-expression of C5aR1 in neurons induced decrease of cell viability, exerting similar effects with OGD/R injury. Isoquercetin acted as a neuroprotective agent against I/R brain injury to suppress inflammatory response and improve cell recovery by inhibiting TLR4 and C5aR1 expression, promoting cAMP/PKA activation, and inhibiting I-κB/NF-κB activation and Caspase 3 expression. TLR4 and C5aR1 contributed to inflammation and apoptosis via activating cAMP/PKA/I-κB/NF-κB signaling during cerebral I/R, suggesting that this signaling pathway may be a potent therapeutic target in ischemic stroke. Isoquercetin was identified as a neuroprotective agent, which maybe a promising therapeutic agent used for the treatment of ischemic stroke and related diseases.
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Affiliation(s)
- Yunwei Shi
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-innovation Center of Neuroregeneration, Nantong University, Nantong, China
| | - Xinyi Chen
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-innovation Center of Neuroregeneration, Nantong University, Nantong, China
| | - Jiaxing Liu
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-innovation Center of Neuroregeneration, Nantong University, Nantong, China
| | - Xingjuan Fan
- Department of Neurology, Affiliated Hospital of Nantong University, Nantong, China
| | - Ying Jin
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-innovation Center of Neuroregeneration, Nantong University, Nantong, China
| | - Jingxiao Gu
- Medical School, Nantong University, Nantong, China
| | - Jiale Liang
- Medical School, Nantong University, Nantong, China
| | - Xinmiao Liang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
| | - Caiping Wang
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-innovation Center of Neuroregeneration, Nantong University, Nantong, China
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65
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Cho S, Rehni AK, Dave KR. Tobacco Use: A Major Risk Factor of Intracerebral Hemorrhage. J Stroke 2021; 23:37-50. [PMID: 33600701 PMCID: PMC7900392 DOI: 10.5853/jos.2020.04770] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Accepted: 01/20/2021] [Indexed: 12/23/2022] Open
Abstract
Spontaneous intracerebral hemorrhage (sICH) is one of the deadliest subtypes of stroke, and no treatment is currently available. One of the major risk factors is tobacco use. In this article, we review literature on how tobacco use affects the risk of sICH and also summarize the known effects of tobacco use on outcomes following sICH. Several studies demonstrate that the risk of sICH is higher in current cigarette smokers compared to non-smokers. The literature also establishes that cigarette smoking not only increases the risk of sICH but also increases hematoma growth, results in worse outcomes, and increases the risk of death from sICH. This review also discusses potential mechanisms activated by tobacco use which result in an increase in risk and severity of sICH. Exploring the underlying mechanisms may help alleviate the risk of sICH in tobacco users as well as may help better manage tobacco user sICH patients.
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Affiliation(s)
- Sunjoo Cho
- Peritz Scheinberg Cerebral Vascular Disease Research Laboratories, University of Miami Miller School of Medicine, Miami, FL, USA.,Department of Neurology, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Ashish K Rehni
- Peritz Scheinberg Cerebral Vascular Disease Research Laboratories, University of Miami Miller School of Medicine, Miami, FL, USA.,Department of Neurology, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Kunjan R Dave
- Peritz Scheinberg Cerebral Vascular Disease Research Laboratories, University of Miami Miller School of Medicine, Miami, FL, USA.,Department of Neurology, University of Miami Miller School of Medicine, Miami, FL, USA.,Department of Neuroscience Program, University of Miami Miller School of Medicine, Miami, FL, USA
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66
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Wu M, Gao R, Dang B, Chen G. The Blood Component Iron Causes Neuronal Apoptosis Following Intracerebral Hemorrhage via the PERK Pathway. Front Neurol 2021; 11:588548. [PMID: 33424743 PMCID: PMC7793836 DOI: 10.3389/fneur.2020.588548] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Accepted: 11/05/2020] [Indexed: 01/31/2023] Open
Abstract
PERK signaling pathway plays an important role in neuronal apoptosis after Intracerebral hemorrhage (ICH). ICH can cause the release of blood components into the brain. However, which component in the blood plays a major role still unclear. This study was designed to investigate the activation of the PERK pathway in different blood components after ICH and explore which components have major relationships with neuronal apoptosis. Eighty-five Sprague-Dawley rats were used to establish an ICH model. Western blot (WB) and immunofluorescence (IF) were used to evaluate the expression of the PERK pathway. TUNEL staining, FJC staining and neurological score were used to evaluate neuronal apoptosis and necrosis after ICH. The results showed that protein levels of p-PERK and p-eIF2α were upregulated following ICH with the injection of Fe3+ and Fe2+ after 48 h. Then, deferoxamine (DFX) was used to study the roles of Fe3+ in ICH through the PERK signaling pathway. The results showed that injection of DFX reversed increasing protein levels and prevented neuronal apoptosis. Thus, iron plays an important role in ICH through the PERK signaling pathway. Furthermore, the reduction of iron demonstrates neuroprotective effects in ICH. This suggests that targeting intervention of the iron and PERK pathway could be an effective treatment strategy to improve ICH prognosis.
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Affiliation(s)
- Muyao Wu
- Department of Rehabilitation, Zhangjiagang TCM Hospital Affiliated to Nanjing University of Chinese Medicine, Suzhou, China
| | - Rong Gao
- Department of Neurosurgery, Zhangjiagang TCM Hospital Affiliated to Nanjing University of Chinese Medicine, Suzhou, China
| | - Baoqi Dang
- Department of Rehabilitation, Zhangjiagang TCM Hospital Affiliated to Nanjing University of Chinese Medicine, Suzhou, China
| | - Gang Chen
- Department of Neurosurgery and Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, China
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67
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Hyperactivation of P2X7 receptors as a culprit of COVID-19 neuropathology. Mol Psychiatry 2021; 26:1044-1059. [PMID: 33328588 PMCID: PMC7738776 DOI: 10.1038/s41380-020-00965-3] [Citation(s) in RCA: 88] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 11/04/2020] [Accepted: 11/17/2020] [Indexed: 12/14/2022]
Abstract
Scientists and health professionals are exhaustively trying to contain the coronavirus disease 2019 (COVID-19) pandemic by elucidating viral invasion mechanisms, possible drugs to prevent viral infection/replication, and health cares to minimize individual exposure. Although neurological symptoms are being reported worldwide, neural acute and long-term consequences of SARS-CoV-2 are still unknown. COVID-19 complications are associated with exacerbated immunoinflammatory responses to SARS-CoV-2 invasion. In this scenario, pro-inflammatory factors are intensely released into the bloodstream, causing the so-called "cytokine storm". Both pro-inflammatory factors and viruses may cross the blood-brain barrier and enter the central nervous system, activating neuroinflammatory responses accompanied by hemorrhagic lesions and neuronal impairment, which are largely described processes in psychiatric disorders and neurodegenerative diseases. Therefore, SARS-CoV-2 infection could trigger and/or worse brain diseases. Moreover, patients with central nervous system disorders associated to neuroimmune activation (e.g. depression, Parkinson's and Alzheimer's disease) may present increased susceptibility to SARS-CoV-2 infection and/or achieve severe conditions. Elevated levels of extracellular ATP induced by SARS-CoV-2 infection may trigger hyperactivation of P2X7 receptors leading to NLRP3 inflammasome stimulation as a key mediator of neuroinvasion and consequent neuroinflammatory processes, as observed in psychiatric disorders and neurodegenerative diseases. In this context, P2X7 receptor antagonism could be a promising strategy to prevent or treat neurological complications in COVID-19 patients.
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68
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Chen S, Tang C, Ding H, Wang Z, Liu X, Chai Y, Jiang W, Han Y, Zeng H. Maf1 Ameliorates Sepsis-Associated Encephalopathy by Suppressing the NF- kB/NLRP3 Inflammasome Signaling Pathway. Front Immunol 2020; 11:594071. [PMID: 33424842 PMCID: PMC7785707 DOI: 10.3389/fimmu.2020.594071] [Citation(s) in RCA: 71] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Accepted: 11/17/2020] [Indexed: 12/13/2022] Open
Abstract
Background The NOD-, LRR- and pyrin domain-containing protein 3 (NLRP3) inflammasome has been identified as an important mediator of blood–brain-barrier disruption in sepsis-associated encephalopathy (SAE). However, no information is available concerning the critical upstream regulators of SAE. Methods Lipopolysaccharide (LPS) was used to establish an in vitro model of blood–brain barrier (BBB) disruption and an in vivo model of SAE. Disruption of BBB integrity was assessed by measuring the expression levels of tight-junction proteins. NLRP3 inflammasome activation, pro-inflammatory cytokines levels, and neuroapoptosis were measured using biochemical assays. Finally, the FITC-dextran Transwell assay and Evan’s blue dye assay were used to assess the effect of Maf1 on LPS-induced endothelial permeability in vitro and in vivo. Results We found that Maf1 significantly suppressed the brain inflammatory response and neuroapoptosis induced by LPS in vivo and in vitro. Notably, Maf1 downregulated activation of the NF-κB/p65-induced NLRP3 inflammasome and the expression of pro-inflammatory cytokines. In addition, we found that Maf1 and p65 directly bound to the NLRP3 gene promoter region and competitively regulated the function of NLRP3 in inflammations. Moreover, overexpression of NLRP3 reversed the effects of p65 on BBB integrity, apoptosis, and inflammation in response to LPS. Our study revealed novel role for Maf1 in regulating NF-κB-mediated inflammasome formation, which plays a prominent role in SAE. Conclusions Regulation of Maf1 might be a therapeutic strategy for SAE and other neurodegenerative diseases associated with inflammation.
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Affiliation(s)
- Shenglong Chen
- Department of Critical Care Medicine, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Chaogang Tang
- Department of Cerebrovascular Disease, The Fifth Affiliated Hospital of Sun Yat-Sen University, Zhuhai, China
| | - Hongguang Ding
- Department of Critical Care Medicine, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Zhonghua Wang
- Department of Gerontological Critical Care Medicine, Guangdong Provincial People's Hospital/Guangdong Academy of Medical Sciences/Guangdong Provincial Geriatrics Institute, Guangzhou, China
| | - Xinqiang Liu
- Department of Critical Care Medicine, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Yunfei Chai
- Anesthesiology Department of Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Wenqiang Jiang
- Department of Critical Care Medicine, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Yongli Han
- Department of Critical Care Medicine, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Hongke Zeng
- Department of Critical Care Medicine, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
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69
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Xing G, Zhao T, Zhang X, Li H, Li X, Cui P, Li M, Li D, Zhang N, Jiang W. Astrocytic Sonic Hedgehog Alleviates Intracerebral Hemorrhagic Brain Injury via Modulation of Blood-Brain Barrier Integrity. Front Cell Neurosci 2020; 14:575690. [PMID: 33343302 PMCID: PMC7747855 DOI: 10.3389/fncel.2020.575690] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Accepted: 10/08/2020] [Indexed: 11/21/2022] Open
Abstract
Background: Intracerebral hemorrhage (ICH) is a fatal subtype of stroke that lacks effective therapy. Blood-brain barrier (BBB) damage is a hallmark of ICH-induced brain injury that leads to edema formation, leukocytes infiltration, influx of blood components into the perihematomal (PHE) region, and eventually brain injury. Astrocytes are essential for the formation and maintenance of the BBB by providing secreted molecules that contribute to the association between these cells. Sonic hedgehog (SHH) derived from astrocytes promotes the maturity and integrity of the BBB by upregulating tight junctions (TJs) in brain capillary endothelial cells (ECs). However, the effect of SHH on BBB in ICH has not been investigated. Methods: Cyclopamine (CYC) is a potent, selective inhibitor that specifically blocks the SHH signaling pathway. Here, we used pharmacological inhibitions (CYC and its derivatives) to determine a critical role of the SHH signaling pathway in promoting BBB integrity after ICH by mechanisms of regulating the TJ proteins in vivo and in vitro. Results: The expression of astrocytic SHH was upregulated in mouse brains after ICH. Compared with the vehicle-treated group, inhibition of the SHH signaling pathway with CYC and its derivatives treatments aggravated neurological function deficits, brain edema, hematoma volume, and BBB impairment by downregulating TJs in ECs through the SHH-Gli-1 axis in vivo and in vitro. Conclusions: SHH signaling pathway at the level of the BBB provides a barrier-promoting effect, suggesting that the SHH signaling pathway may function as a potential therapeutic target for restoring BBB function in ICH.
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Affiliation(s)
- Gebeili Xing
- Department of Neurology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China.,Department of Neurology, Inner Mongolia People's Hospital, Hohhot, China
| | - Tianman Zhao
- Department of Neurology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Xiyue Zhang
- Department of Neurology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - He Li
- Department of Neurology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Xiuping Li
- Department of Neurology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Pan Cui
- Department of Neurology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Minshu Li
- Department of Neurology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Daojing Li
- Department of Neurology, Affiliated Hospital of Jining Medical University, Jining, China
| | - Nan Zhang
- Department of Neurology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China
| | - Wei Jiang
- Department of Neurology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China
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70
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Okada T, Suzuki H, Travis ZD, Zhang JH. The Stroke-Induced Blood-Brain Barrier Disruption: Current Progress of Inspection Technique, Mechanism, and Therapeutic Target. Curr Neuropharmacol 2020; 18:1187-1212. [PMID: 32484111 PMCID: PMC7770643 DOI: 10.2174/1570159x18666200528143301] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 04/23/2020] [Accepted: 05/23/2020] [Indexed: 02/07/2023] Open
Abstract
Stroke is one of the leading causes of mortality and morbidity worldwide. The blood-brain barrier (BBB) is a characteristic structure of microvessel within the brain. Under normal physiological conditions, the BBB plays a role in the prevention of harmful substances entering into the brain parenchyma within the central nervous system. However, stroke stimuli induce the breakdown of BBB leading to the influx of cytotoxic substances, vasogenic brain edema, and hemorrhagic transformation. Therefore, BBB disruption is a major complication, which needs to be addressed in order to improve clinical outcomes in stroke. In this review, we first discuss the structure and function of the BBB. Next, we discuss the progress of the techniques utilized to study BBB breakdown in in-vitro and in-vivo studies, along with biomarkers and imaging techniques in clinical settings. Lastly, we highlight the mechanisms of stroke-induced neuroinflammation and apoptotic process of endothelial cells causing BBB breakdown, and the potential therapeutic targets to protect BBB integrity after stroke. Secondary products arising from stroke-induced tissue damage provide transformation of myeloid cells such as microglia and macrophages to pro-inflammatory phenotype followed by further BBB disruption via neuroinflammation and apoptosis of endothelial cells. In contrast, these myeloid cells are also polarized to anti-inflammatory phenotype, repairing compromised BBB. Therefore, therapeutic strategies to induce anti-inflammatory phenotypes of the myeloid cells may protect BBB in order to improve clinical outcomes of stroke patients.
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Affiliation(s)
- Takeshi Okada
- Department of Physiology and Pharmacology, Loma Linda University, Loma Linda, CA, USA, Risley Hall, Room 219,
11041 Campus St, Loma Linda, CA 92354, USA,Department of Neurosurgery, Mie University Graduate School of Medicine, Mie, Japan, 2-174 Edobashi, Tsu, Mie 514-8507, Japan
| | - Hidenori Suzuki
- Department of Neurosurgery, Mie University Graduate School of Medicine, Mie, Japan, 2-174 Edobashi, Tsu, Mie 514-8507, Japan
| | - Zachary D Travis
- Department of Physiology and Pharmacology, Loma Linda University, Loma Linda, CA, USA, Risley Hall, Room 219,
11041 Campus St, Loma Linda, CA 92354, USA,Department of Earth and Biological Sciences, Loma Linda University, Loma Linda, CA, USA , Risley Hall, Room 219, 11041 Campus St, Loma Linda, CA 92354, USA
| | - John H Zhang
- Department of Physiology and Pharmacology, Loma Linda University, Loma Linda, CA, USA, Risley Hall, Room 219,
11041 Campus St, Loma Linda, CA 92354, USA,Department of Anesthesiology, Loma Linda University, Loma Linda, CA, USA, Risley Hall, Room 219, 11041 Campus St, Loma Linda, CA 92354, USA,Department of Neurosurgery, Loma Linda University, Loma Linda, CA, USA, Risley Hall, Room 219, 11041 Campus St, Loma Linda, CA 92354, USA
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71
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Bai Q, Sheng Z, Liu Y, Zhang R, Yong VW, Xue M. Intracerebral haemorrhage: from clinical settings to animal models. Stroke Vasc Neurol 2020; 5:388-395. [PMID: 33376200 PMCID: PMC7804065 DOI: 10.1136/svn-2020-000334] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 02/21/2020] [Accepted: 02/27/2020] [Indexed: 12/13/2022] Open
Abstract
Spontaneous intracerebral haemorrhage (ICH) is a devastating type of stroke with high mortality and morbidity and for which no effective treatments are available to date. Much experimental and clinical research have been performed to explore its mechanisms regard the subsequent inflammatory cascade and to seek the potential therapeutic strategies. The aim of this review is to discuss insights from clinical settings that have led to the development of numerous animal models of ICH. Some of the current and future challenges for clinicians to understand ICH are also surveyed.
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Affiliation(s)
- Qian Bai
- The Departments of Cerebrovascular Diseases; Henan Medical Key Laboratory of Translational Cerebrovascular Diseases, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Zhaofu Sheng
- The Departments of Cerebrovascular Diseases; Henan Medical Key Laboratory of Translational Cerebrovascular Diseases, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Yang Liu
- The Departments of Cerebrovascular Diseases; Henan Medical Key Laboratory of Translational Cerebrovascular Diseases, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Ruiyi Zhang
- The Departments of Cerebrovascular Diseases; Henan Medical Key Laboratory of Translational Cerebrovascular Diseases, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Voon Wee Yong
- Hotchkiss Brain Institute and Department of Clinical Neurosciences, University of Calgary, Calgary, Alberta, Canada
| | - Mengzhou Xue
- The Departments of Cerebrovascular Diseases; Henan Medical Key Laboratory of Translational Cerebrovascular Diseases, The Second Affiliated Hospital of Zhengzhou University, Zhengzhou, China
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72
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Molecular Correlates of Hemorrhage and Edema Volumes Following Human Intracerebral Hemorrhage Implicate Inflammation, Autophagy, mRNA Splicing, and T Cell Receptor Signaling. Transl Stroke Res 2020; 12:754-777. [PMID: 33206327 PMCID: PMC8421315 DOI: 10.1007/s12975-020-00869-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 10/02/2020] [Accepted: 10/18/2020] [Indexed: 12/16/2022]
Abstract
Intracerebral hemorrhage (ICH) and perihematomal edema (PHE) volumes are major determinants of ICH outcomes as is the immune system which plays a significant role in damage and repair. Thus, we performed whole-transcriptome analyses of 18 ICH patients to delineate peripheral blood genes and networks associated with ICH volume, absolute perihematomal edema (aPHE) volume, and relative PHE (aPHE/ICH; rPHE). We found 440, 266, and 391 genes correlated with ICH and aPHE volumes and rPHE, respectively (p < 0.005, partial-correlation > |0.6|). These mainly represented inflammatory pathways including NF-κB, TREM1, and Neuroinflammation Signaling-most activated with larger volumes. Weighted Gene Co-Expression Network Analysis identified seven modules significantly correlated with these measures (p < 0.05). Most modules were enriched in neutrophil, monocyte, erythroblast, and/or T cell-specific genes. Autophagy, apoptosis, HIF-1α, inflammatory and neuroinflammatory response (including Toll-like receptors), cell adhesion (including MMP9), platelet activation, T cell receptor signaling, and mRNA splicing were represented in these modules (FDR p < 0.05). Module hub genes, potential master regulators, were enriched in neutrophil-specific genes in three modules. Hub genes included NCF2, NCF4, STX3, and CSF3R, and involved immune response, autophagy, and neutrophil chemotaxis. One module that correlated negatively with ICH volume correlated positively with rPHE. Its genes and hubs were enriched in T cell-specific genes including hubs LCK and ITK, Src family tyrosine kinases whose modulation improved outcomes and reduced BBB dysfunction following experimental ICH. This study uncovers molecular underpinnings associated with ICH and PHE volumes and pathophysiology in human ICH, where knowledge is scarce. The identified pathways and hub genes may represent novel therapeutic targets.
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73
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Tropea T, Greenwood SL, Sibley CP, Cottrell EC. Grape Seed Extract Polyphenols Improve Resistance Artery Function in Pregnant eNOS -/- Mice. Front Physiol 2020; 11:588000. [PMID: 33240108 PMCID: PMC7677241 DOI: 10.3389/fphys.2020.588000] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Accepted: 10/15/2020] [Indexed: 12/22/2022] Open
Abstract
Hypertension during pregnancy is a leading cause of maternal and fetal morbidity and mortality worldwide, increasing the risk of complications including preeclampsia, intracerebral hemorrhage and fetal growth restriction. Increased oxidative stress is known to contribute to poor vascular function; however, trials of antioxidant supplementation have raised concerns about fetal outcomes, including risk of low birthweight. Grape seed extract polyphenols (GSEP) have been suggested to promote cardiovascular protection, at least in part through antioxidant actions. We tested the hypothesis that administration of GSEP during pregnancy would reduce oxidative stress and improve resistance artery function with no detrimental effects on fetal growth, in an established model of maternal hypertension associated with vascular dysfunction, the endothelial NO synthase knockout (eNOS-/-) mouse. Pregnant C57BL/6J (WT) and eNOS-/- mice received either GSEP (200 mg/kg/day) or drinking water, between gestational (GD) day 10.5 and GD18.5. At GD17.5, maternal systolic blood pressure (SBP) was measured; at GD18.5, maternal malondialdehyde (MDA) concentrations, vascular function of aortic, mesenteric, uterine and posterior cerebral arteries was assessed, and fetal outcome evaluated. GSEP reduced maternal SBP (P < 0.01) and plasma MDA concentrations (P < 0.01) in eNOS-/- mice. Whilst there was no effect of GSEP on vascular reactivity of aortas, GSEP improved endothelial-dependent relaxation in mesenteric and uterine arteries of eNOS-/- mice (P < 0.05 and P < 0.001, respectively) and normalized lumen diameters of pressurized posterior cerebral arteries in eNOS-/- mice (P < 0.001). Supplementation with GSEP had no effect in WT mice and did not affect fetal outcomes in either genotype. Our data suggest that GSEP improve resistance artery function, potentially through antioxidant actions, and provide a basis to further investigate these beneficial effects including in the prevention of intracerebral hemorrhage. Maternal supplementation with GSEP may be a safe intervention to improve outcomes in pregnancies associated with hypertension and vascular dysfunction.
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Affiliation(s)
- Teresa Tropea
- Division of Developmental Biology and Medicine, Faculty of Biology, Medicine and Health, Maternal and Fetal Health Research Centre, University of Manchester, Manchester, United Kingdom.,Manchester Academic Health Science Centre, Manchester University NHS Foundation Trust, St. Mary's Hospital, Manchester, United Kingdom
| | - Susan L Greenwood
- Division of Developmental Biology and Medicine, Faculty of Biology, Medicine and Health, Maternal and Fetal Health Research Centre, University of Manchester, Manchester, United Kingdom.,Manchester Academic Health Science Centre, Manchester University NHS Foundation Trust, St. Mary's Hospital, Manchester, United Kingdom
| | - Colin P Sibley
- Division of Developmental Biology and Medicine, Faculty of Biology, Medicine and Health, Maternal and Fetal Health Research Centre, University of Manchester, Manchester, United Kingdom.,Manchester Academic Health Science Centre, Manchester University NHS Foundation Trust, St. Mary's Hospital, Manchester, United Kingdom
| | - Elizabeth C Cottrell
- Division of Developmental Biology and Medicine, Faculty of Biology, Medicine and Health, Maternal and Fetal Health Research Centre, University of Manchester, Manchester, United Kingdom.,Manchester Academic Health Science Centre, Manchester University NHS Foundation Trust, St. Mary's Hospital, Manchester, United Kingdom
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74
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Huang T, Fu G, Gao J, Zhang Y, Cai W, Wu S, Jia S, Xia S, Bachmann T, Bekker A, Tao YX. Fgr contributes to hemorrhage-induced thalamic pain by activating NF-κB/ERK1/2 pathways. JCI Insight 2020; 5:139987. [PMID: 33055425 PMCID: PMC7605540 DOI: 10.1172/jci.insight.139987] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Accepted: 09/09/2020] [Indexed: 12/22/2022] Open
Abstract
Thalamic pain, a type of central poststroke pain, frequently occurs following ischemia/hemorrhage in the thalamus. Current treatment of this disorder is often ineffective, at least in part due to largely unknown mechanisms that underlie thalamic pain genesis. Here, we report that hemorrhage caused by microinjection of type IV collagenase or autologous whole blood into unilateral ventral posterior lateral nucleus and ventral posterior medial nucleus of the thalamus increased the expression of Fgr, a member of the Src family nonreceptor tyrosine kinases, at both mRNA and protein levels in thalamic microglia. Pharmacological inhibition or genetic knockdown of thalamic Fgr attenuated the hemorrhage-induced thalamic injury on the ipsilateral side and the development and maintenance of mechanical, heat, and cold pain hypersensitivities on the contralateral side. Mechanistically, the increased Fgr participated in hemorrhage-induced microglial activation and subsequent production of TNF-α likely through activation of both NF-κB and ERK1/2 pathways in thalamic microglia. Our findings suggest that Fgr is a key player in thalamic pain and a potential target for the therapeutic management of this disorder.
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Affiliation(s)
| | | | - Ju Gao
- Department of Anesthesiology
| | | | | | | | | | | | | | | | - Yuan-Xiang Tao
- Department of Anesthesiology
- Department of Pharmacology, Physiology & Neuroscience; and
- Department of Cell Biology & Molecular Medicine, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey, USA
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75
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Zhou ZY, Zhao WR, Xiao Y, Zhang J, Tang JY, Lee SMY. Mechanism Study of the Protective Effects of Sodium Tanshinone IIA Sulfonate Against Atorvastatin-Induced Cerebral Hemorrhage in Zebrafish: Transcriptome Analysis. Front Pharmacol 2020; 11:551745. [PMID: 33123006 PMCID: PMC7567336 DOI: 10.3389/fphar.2020.551745] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Accepted: 09/10/2020] [Indexed: 12/11/2022] Open
Abstract
Hemorrhage stroke is a severe vascular disease of the brain with a high mortality rate in humans. Salvia miltiorrhiza Bunge (Danshen) is a well-known Chinese Materia Medica for treating cerebral vascular and cardiovascular diseases in traditional Chinese medicine. Sodium tanshinone IIA sulfonate (STS) is a water-soluble derivative of tanshinone IIA, which is the main active ingredient of Danshen. In our previous study, we established a zebrafish model of cerebral hemorrhage and found that STS dramatically decreased both the hemorrhage rate and hemorrhage area, although the underlying mechanism was not fully elucidated. We conducted a transcriptome analysis of the protective effect of STS against atorvastatin (Ator)-induced cerebral hemorrhage in zebrafish using RNA-seq technology. RNA-seq revealed 207 DEGs between the Ator-treated group and control group; the expression levels of 53 DEGs between the Ator-treated group and control group were reversed between the STS + Ator-treated group and Ator-treated group. GO enrichment analysis indicated that these 53 DEGs encode proteins with roles in hemoglobin complexes, oxygen carrier activity and oxygen binding, etc. KEGG analysis suggested that these 53 DEGs were most enriched in three items, namely, porphyrin and chlorophyll metabolism, ferroptosis, and the HIF-1 signaling pathway. The PPI network analysis identified 12 hub genes, and we further verified that Ator elevated the mRNA expression levels of hemoglobin (hbae1.3, hbae3, hbae5, hbbe2, and hbbe3), carbonic anhydrase (cahz), HIF-1 (hif1al2) and Na+/H+ exchanger (slc4a1a and slc9a1) genes, while STS significantly suppressed these genes. In addition, we found that pharmacological inhibition of PI3K/Akt, MAPKs, and mTOR signaling pathways by specific inhibitors partially attenuated the protective effect of STS against Ator-induced cerebral hemorrhage in zebrafish, regardless of mTOR inhibition. We concluded that hemoglobin, carbonic anhydrase, Na+/H+ exchanger and HIF-1 genes might be potential biomarkers of Ator-induced cerebral hemorrhage in zebrafish, as well as pharmacological targets of STS. Moreover, HIF-1 and its regulators, i.e., the PI3K/Akt and MAPK signaling pathways, were involved in the protective effect of STS against Ator-induced cerebral hemorrhage. This study also provided evidence of biomarkers involved in hemorrhage stroke and improved understanding of the effects of HMG-COA reductase inhibition on vascular permeability and cerebral hemorrhage.
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Affiliation(s)
- Zhong-Yan Zhou
- Department of Cardiovascular Research Laboratory, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China.,State Key Laboratory of Quality Research in Chinese Medicine and Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Wai-Rong Zhao
- Department of Cardiovascular Research Laboratory, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Ying Xiao
- Department of Cardiovascular Research Laboratory, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Jing Zhang
- Department of Cardiovascular Research Laboratory, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Jing-Yi Tang
- Department of Cardiovascular Research Laboratory, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Simon Ming-Yuen Lee
- State Key Laboratory of Quality Research in Chinese Medicine and Institute of Chinese Medical Sciences, University of Macau, Macao, China
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76
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Abstract
More than 13 million cases of stroke are occurring annually worldwide. Approximately a quarter of these strokes are recurrent strokes, and there is compelling evidence of the benefit of supervised exercise and risk factor modification programming in the secondary prevention of these strokes. However, there is insufficient time in inpatient and outpatient stroke rehabilitation for focused exercise interventions. General lifestyle interventions on their own, without guidance and supervision, are insufficient for improving physical activity levels. Cardiac rehabilitation (CR) is a setting where cardiac patients, and increasingly stroke patients, receive comprehensive secondary prevention programming, including structured exercise. Unfortunately, not all CR programs accept referrals for people following a stroke and for those that do, only a few patients participate. Therefore, the purpose of this review is to report the barriers and facilitators to improving linkage between health services, with a focus on increasing access to CR. In the next two decades, it is projected that there will be a marked increase in stroke prevalence globally. Therefore, there is an urgent need to create cross-program collaborations between hospitals, outpatient stroke rehabilitation, CR, and community programs. Improving access and removing disparities in access to evidence-based exercise treatments would positively affect the lives of millions of people recovering from stroke.
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77
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Andjelkovic AV, Stamatovic SM, Phillips CM, Martinez-Revollar G, Keep RF. Modeling blood-brain barrier pathology in cerebrovascular disease in vitro: current and future paradigms. Fluids Barriers CNS 2020; 17:44. [PMID: 32677965 PMCID: PMC7367394 DOI: 10.1186/s12987-020-00202-7] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 06/15/2020] [Indexed: 12/16/2022] Open
Abstract
The complexity of the blood–brain barrier (BBB) and neurovascular unit (NVU) was and still is a challenge to bridge. A highly selective, restrictive and dynamic barrier, formed at the interface of blood and brain, the BBB is a “gatekeeper” and guardian of brain homeostasis and it also acts as a “sensor” of pathological events in blood and brain. The majority of brain and cerebrovascular pathologies are associated with BBB dysfunction, where changes at the BBB can lead to or support disease development. Thus, an ultimate goal of BBB research is to develop competent and highly translational models to understand mechanisms of BBB/NVU pathology and enable discovery and development of therapeutic strategies to improve vascular health and for the efficient delivery of drugs. This review article focuses on the progress being made to model BBB injury in cerebrovascular diseases in vitro.
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Affiliation(s)
- Anuska V Andjelkovic
- Department of Pathology, University of Michigan Medical School, 7520 MSRB I, 1150 West Medical Center Dr, Ann Arbor, MI, 48109-5602, USA.
| | - Svetlana M Stamatovic
- Department of Pathology, University of Michigan Medical School, 7520 MSRB I, 1150 West Medical Center Dr, Ann Arbor, MI, 48109-5602, USA
| | - Chelsea M Phillips
- Graduate Program in Neuroscience, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Gabriela Martinez-Revollar
- Department of Pathology, University of Michigan Medical School, 7520 MSRB I, 1150 West Medical Center Dr, Ann Arbor, MI, 48109-5602, USA
| | - Richard F Keep
- Department of Neurosurgery, University of Michigan Medical School, Ann Arbor, MI, USA.,Department of Molecular Integrative Physiology, University of Michigan Medical School, Ann Arbor, MI, USA
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78
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Young GH, Tang SC, Wu VC, Wang KC, Nong JY, Huang PY, Hu CJ, Chiou HY, Jeng JS, Hsu CY. The functional role of hemojuvelin in acute ischemic stroke. J Cereb Blood Flow Metab 2020; 40:1316-1327. [PMID: 31307288 PMCID: PMC7238368 DOI: 10.1177/0271678x19861448] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Our study aimed to establish the role of hemojuvelin (HJV) in acute ischemic stroke (AIS). We performed immunohistochemistry for HJV expression in human brain tissues from 10 AIS and 2 non-stroke autopsy subjects. Plasma HJV was measured in 112 AIS patients within 48 h after stroke. The results showed significantly increased HJV expression in brain tissues from AIS patients compare to non-stroke subjects. After adjusting for clinical variables, plasma levels of HJV within 48 h after stroke were an independent predictor of poor functional outcome three months post-stroke (OR:1.78, 95% CI: 1.03-3.07; P = 0.038). In basic part, Western blotting showed that HJV expression in mice brains was apparent at 3 h after middle cerebral artery occlusion (MCAO), and increased significantly at 72 h. In cultured cortical neurons, expression of HJV protein increased remarkably 24 h after oxygen glucose deprivation (OGD), and small interfering RNAs (siHJV) transfected OGD neurons had a lower apoptotic rate. Importantly, 72 h post-MCAO, HJV knockout mice had significantly smaller infarcts and less expression of cleaved caspase-3 protein compared with wild-type mice. In summary, HJV participates in the mechanisms of post-stroke neuronal injury, and that plasma HJV levels can be a potential early outcome indicator for AIS patients.
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Affiliation(s)
| | - Sung-Chun Tang
- Stroke Center and Department of Neurology, National Taiwan University Hospital, Taipei
| | - Vin-Cent Wu
- Department of Internal Medicine, National Taiwan University Hospital, Taipei
| | - Kuo-Chuan Wang
- Department of Surgery, National Taiwan University Hospital, Taipei
| | - Jing-Yi Nong
- Department of Internal Medicine, National Taiwan University Hospital, Taipei
| | - Po-Yuan Huang
- Stroke Center and Department of Neurology, National Taiwan University Hospital, Taipei
| | - Chaur-Jong Hu
- Department of Neurology, Taipei Medical University-Shuang Ho Hospital, Taipei
| | - Hung-Yi Chiou
- School of Public Health, Taipei Medical University, Taipei
| | - Jiann-Shing Jeng
- Stroke Center and Department of Neurology, National Taiwan University Hospital, Taipei
| | - Chung Y Hsu
- Graduate Institute of Clinical Medical Science, China Medical University, Taichung
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79
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Jolink WM, Lindenholz A, van Etten ES, van Nieuwenhuizen KM, Schreuder FH, Kuijf HJ, van Osch MJ, Hendrikse J, Rinkel GJ, Wermer MJ, Klijn CJ. Contrast leakage distant from the hematoma in patients with spontaneous ICH: A 7 T MRI study. J Cereb Blood Flow Metab 2020; 40:1002-1011. [PMID: 31142225 PMCID: PMC7178151 DOI: 10.1177/0271678x19852876] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Disruption of the blood-brain barrier (BBB) might play a role in the pathophysiology of cerebral small vessel disease-related ICH. The aim of this study was to assess presence and extent of contrast agent leakage distant from the hematoma as a marker of BBB disruption in patients with spontaneous ICH. We prospectively performed 7 tesla MRI in adult patients with spontaneous ICH and assessed contrast leakage distant from the hematoma on 3D FLAIR images. Thirty-one patients were included (mean age 60 years, 29% women). Median time between ICH and MRI was 20 days (IQR 9-67 days). Seventeen patients (54%; seven lobar, nine deep, one infratentorial ICH) had contrast leakage, located cortical in 16 and cortical and deep in one patient. Patients with contrast leakage more often had lobar cerebral microbleeds (CMBs; 77%) than those without (36%; RR 2.5, 95% CI 1.1-5.7) and a higher number of lobar CMBs (patients with contrast leakage: median 2, IQR 1-8 versus those without: median 0, IQR 0-2; p = 0.02). This study shows that contrast leakage distant from the hematoma is common in days to weeks after spontaneous ICH. It is located predominantly cortical and related to lobar CMBs and therefore possibly to cerebral amyloid angiopathy.
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Affiliation(s)
- Wilmar Mt Jolink
- Department of Neurology and Neurosurgery, Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Arjen Lindenholz
- Department of Radiology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Ellis S van Etten
- Department of Neurology, Leiden University Medical Center, Leiden, The Netherlands
| | - Koen M van Nieuwenhuizen
- Department of Neurology and Neurosurgery, Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Floris Hbm Schreuder
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Centre for Neuroscience, Radboud university medical center, Nijmegen, The Netherlands
| | - Hugo J Kuijf
- Image Sciences Institute, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Matthias Jp van Osch
- C.J. Gorter Center for High Field MRI, Department of Radiology, Leiden University Medical Center, Leiden, The Netherlands
| | - Jeroen Hendrikse
- Department of Radiology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Gabriel Je Rinkel
- Department of Neurology and Neurosurgery, Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Marieke Jh Wermer
- Department of Neurology, Leiden University Medical Center, Leiden, The Netherlands
| | - Catharina Jm Klijn
- Department of Neurology and Neurosurgery, Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, The Netherlands.,Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Centre for Neuroscience, Radboud university medical center, Nijmegen, The Netherlands
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80
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Gautam J, Xu L, Nirwane A, Nguyen B, Yao Y. Loss of mural cell-derived laminin aggravates hemorrhagic brain injury. J Neuroinflammation 2020; 17:103. [PMID: 32252790 PMCID: PMC7133020 DOI: 10.1186/s12974-020-01788-3] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Accepted: 03/25/2020] [Indexed: 02/05/2023] Open
Abstract
Background Mural cells synthesize and deposit laminin to the basement membrane. To investigate the function of mural cell-derived laminin, we generated a mutant mouse line lacking mural cell-derived laminin (termed PKO). In a previous study, we showed that the PKO mice were grossly normal under homeostatic condition, but developed blood-brain barrier (BBB) breakdown with advanced age (> 8 months), suggesting that these mutants are intrinsically weak. Based on these findings, we hypothesized that PKO mice have exacerbated injuries in pathological conditions. Methods Using collagenase-induced intracerebral hemorrhage (ICH) as an injury model, we examined various stroke outcomes, including hematoma volume, neurological function, neuronal death, BBB integrity, paracellular/transcellular transport, inflammatory cell infiltration, and brain water content, in PKO mice and their wildtype littermates at young age (6–8 weeks). In addition, transmission electron microscopy (TEM) analysis and an in vitro ICH model were used to investigate the underlying molecular mechanisms. Results Compared to age-matched wildtype littermates, PKO mice display aggravated stroke outcomes, including larger hematoma size, worse neurological function, increased neuronal cell death, enhanced BBB permeability, increased transcytosis, and elevated inflammatory cell infiltration. These mutants also exhibit high baseline brain water content independent of aquaporin-4 (AQP4). In addition, mural cell-derived laminin significantly reduced caveolin-1 without affecting tight junction proteins in the in vitro ICH model. Conclusions These results suggest that mural cell-derived laminin attenuates BBB damage in ICH via decreasing caveolin-1 and thus transcytosis, regulates brain water homeostasis, and plays a beneficial role in ICH.
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Affiliation(s)
- Jyoti Gautam
- Department of Pharmaceutical and Biomedical Sciences, University of Georgia, 240 W Green Street, Athens, GA, 30602, USA
| | - Lingling Xu
- Department of Pharmaceutical and Biomedical Sciences, University of Georgia, 240 W Green Street, Athens, GA, 30602, USA
| | - Abhijit Nirwane
- Department of Pharmaceutical and Biomedical Sciences, University of Georgia, 240 W Green Street, Athens, GA, 30602, USA
| | - Benjamin Nguyen
- Department of Pharmaceutical and Biomedical Sciences, University of Georgia, 240 W Green Street, Athens, GA, 30602, USA
| | - Yao Yao
- Department of Pharmaceutical and Biomedical Sciences, University of Georgia, 240 W Green Street, Athens, GA, 30602, USA.
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81
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Fang Y, Gao S, Wang X, Cao Y, Lu J, Chen S, Lenahan C, Zhang JH, Shao A, Zhang J. Programmed Cell Deaths and Potential Crosstalk With Blood-Brain Barrier Dysfunction After Hemorrhagic Stroke. Front Cell Neurosci 2020; 14:68. [PMID: 32317935 PMCID: PMC7146617 DOI: 10.3389/fncel.2020.00068] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Accepted: 03/06/2020] [Indexed: 12/13/2022] Open
Abstract
Hemorrhagic stroke is a life-threatening neurological disease characterized by high mortality and morbidity. Various pathophysiological responses are initiated after blood enters the interstitial space of the brain, compressing the brain tissue and thus causing cell death. Recently, three new programmed cell deaths (PCDs), necroptosis, pyroptosis, and ferroptosis, were also found to be important contributors in the pathophysiology of hemorrhagic stroke. Additionally, blood-brain barrier (BBB) dysfunction plays a crucial role in the pathophysiology of hemorrhagic stroke. The primary insult following BBB dysfunction may disrupt the tight junctions (TJs), transporters, transcytosis, and leukocyte adhesion molecule expression, which may lead to brain edema, ionic homeostasis disruption, altered signaling, and immune infiltration, consequently causing neuronal cell death. This review article summarizes recent advances in our knowledge of the mechanisms regarding these new PCDs and reviews their contributions in hemorrhagic stroke and potential crosstalk in BBB dysfunction. Numerous studies revealed that necroptosis, pyroptosis, and ferroptosis participate in cell death after subarachnoid hemorrhage (SAH) and intracerebral hemorrhage (ICH). Endothelial dysfunction caused by these three PCDs may be the critical factor during BBB damage. Also, several signaling pathways were involved in PCDs and BBB dysfunction. These new PCDs (necroptosis, pyroptosis, ferroptosis), as well as BBB dysfunction, each play a critical role after hemorrhagic stroke. A better understanding of the interrelationship among them might provide us with better therapeutic targets for the treatment of hemorrhagic stroke.
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Affiliation(s)
- Yuanjian Fang
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Shiqi Gao
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Xiaoyu Wang
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Yang Cao
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Jianan Lu
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Sheng Chen
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Cameron Lenahan
- Department of Physiology and Pharmacology, Loma Linda University School of Medicine, Loma Linda, CA, United States.,Burrell College of Osteopathic Medicine, Las Cruces, NM, United States.,Center for Neuroscience Research, Loma Linda University School of Medicine, Loma Linda, CA, United States
| | - John H Zhang
- Department of Physiology and Pharmacology, Loma Linda University School of Medicine, Loma Linda, CA, United States.,Center for Neuroscience Research, Loma Linda University School of Medicine, Loma Linda, CA, United States.,Department of Anesthesiology, Loma Linda University School of Medicine, Loma Linda, CA, United States.,Department of Neurosurgery, Loma Linda University School of Medicine, Loma Linda, CA, United States
| | - Anwen Shao
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Jianmin Zhang
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China.,Brain Research Institute, Zhejiang University, Hangzhou, China.,Collaborative Innovation Center for Brain Science, Zhejiang University, Hangzhou, China
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82
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Erdei J, Tóth A, Nagy A, Nyakundi BB, Fejes Z, Nagy B, Novák L, Bognár L, Balogh E, Paragh G, Kappelmayer J, Bácsi A, Jeney V. The Role of Hemoglobin Oxidation Products in Triggering Inflammatory Response Upon Intraventricular Hemorrhage in Premature Infants. Front Immunol 2020; 11:228. [PMID: 32210955 PMCID: PMC7069470 DOI: 10.3389/fimmu.2020.00228] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Accepted: 01/28/2020] [Indexed: 12/14/2022] Open
Abstract
Intraventricular hemorrhage (IVH) is a frequent complication of prematurity that is associated with high neonatal mortality and morbidity. IVH is accompanied by red blood cell (RBC) lysis, hemoglobin (Hb) oxidation, and sterile inflammation. Here we investigated whether extracellular Hb, metHb, ferrylHb, and heme contribute to the inflammatory response after IVH. We collected cerebrospinal fluid (CSF) (n = 20) from premature infants with grade III IVH at different time points after the onset of IVH. Levels of Hb, metHb, total heme, and free heme were the highest in CSF samples obtained between days 0 and 20 after the onset of IVH and were mostly non-detectable in CSF collected between days 41 and 60 of post-IVH. Besides Hb monomers, we detected cross-linked Hb dimers and tetramers in post-IVH CSF samples obtained in days 0–20 and 21–40, but only Hb tetramers were present in CSF samples obtained after 41–60 days. Vascular cell adhesion molecule-1 (VCAM-1) and interleukin-8 (IL-8) levels were higher in CSF samples obtained between days 0 and 20 than in CSF collected between days 41 and 60 of post-IVH. Concentrations of VCAM-1, intercellular adhesion molecule-1 (ICAM-1), and IL-8 strongly correlated with total heme levels in CSF. Applying the identified heme sources on human brain microvascular endothelial cells revealed that Hb oxidation products and free heme contribute to the inflammatory response. We concluded that RBC lysis, Hb oxidation, and heme release are important components of the inflammatory response in IVH. Pharmacological interventions targeting cell-free Hb, Hb oxidation products, and free heme could have potential to limit the neuroinflammatory response following IVH.
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Affiliation(s)
- Judit Erdei
- MTA-DE Lendület Vascular Pathophysiology Research Group, Research Centre for Molecular Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary.,Doctoral School of Molecular Cell and Immune Biology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Andrea Tóth
- MTA-DE Lendület Vascular Pathophysiology Research Group, Research Centre for Molecular Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary.,Doctoral School of Molecular Cell and Immune Biology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Andrea Nagy
- Department of Pediatrics, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Benard Bogonko Nyakundi
- MTA-DE Lendület Vascular Pathophysiology Research Group, Research Centre for Molecular Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary.,Doctoral School of Molecular Cell and Immune Biology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Zsolt Fejes
- Department of Laboratory Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Béla Nagy
- Department of Laboratory Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - László Novák
- Department of Neurosurgery, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - László Bognár
- Department of Neurosurgery, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Enikö Balogh
- MTA-DE Lendület Vascular Pathophysiology Research Group, Research Centre for Molecular Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - György Paragh
- Department of Internal Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - János Kappelmayer
- Department of Laboratory Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Attila Bácsi
- Department of Immunology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Viktória Jeney
- MTA-DE Lendület Vascular Pathophysiology Research Group, Research Centre for Molecular Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
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83
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Abstract
Although Alzheimer's disease (AD) was described over a century ago, there are no effective approaches to its prevention and treatment. Such a slow progress is explained, at least in part, by our incomplete understanding of the mechanisms underlying the pathogenesis of AD. Here, I champion a hypothesis whereby AD is initiated on a disruption of the blood-brain barrier (BBB) caused by either genetic or non-genetic risk factors. The BBB disruption leads to an autoimmune response against pyramidal neurons located in the allo- and neocortical structures involved in memory formation and storage. The response caused by the adaptive immune system is not strong enough to directly kill neurons but may be sufficient to make them selectively vulnerable to neurofibrillary pathology. This hypothesis is based on the recent data showing that memory formation is associated with epigenetic chromatin modifications and, therefore, may be accompanied by expression of memory-specific proteins recognized by the immune system as "non-self" antigens. The autoimmune hypothesis is testable, and I discuss potential ways for its experimental and clinical verification. If confirmed, this hypothesis can radically change therapeutic approaches to AD prevention and treatment.
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Affiliation(s)
- Yuri I Arshavsky
- BioCircuits Institute, University of California San Diego, La Jolla, CA, USA
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84
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Freitas-Silva M, Medeiros R, Nunes JPL. Low density lipoprotein cholesterol values and outcome of stroke patients: influence of previous aspirin therapy. Neurol Res 2020; 42:267-274. [PMID: 32024449 DOI: 10.1080/01616412.2020.1724463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Background: The link between low-density lipoprotein cholesterol (LDL-C) and stroke risk remains controversial and few studies have evaluated the effect of LDL-C after stroke survival.Aims: We assessed the hypothesis proposing the effect of LDL-C on the outcome of stroke patients under the influence of previous Aspirin Therapy.Methods: Associations between LDL-C and outcomes. The effect of LDL cholesterol on stoke outcome was evaluated using Kaplan-Meier methodology, log-rank test, Cox proportional hazard models and Bootstrap Analysis.Results: In a cohort of 342 cases, we observed that among stroke patients with no record of previous aspirin therapy LDL-C levels within recommended range (nLDL-C) are associated to a poor overall survival on (p < 0.001, log-rank test) leading to a 4-fold increased mortality risk in both timeframes of 12 (HR 4.45, 95% CI 1.55-12.71; p = 0.004) or 24 months (HR 4.13, 95%CI 1.62-10.50;p = 0.003) after the first event of stroke. Moreover, modelling the risk of a second event after the first stroke in the timeframe of 24 months demonstrated a predictive capacity for nLDL-C plasmatic levels (HR 3.94, 95%CI 1.55-10.05; p = 0.004) confirmed by Bootstrap analysis (p = 0.003; 1000 replications). In a further step, the inclusion of LDL-C in simulating models equations to predict the risk of a second event in the timeframe of 12 months increased nearly 20% the predictive ability (c-index from 0.763 to 0.956).Conclusion: A worse outcome was seen in stroke patients with normal levels of LDLC, but this finding was restricted to patients not under previous aspirin therapy.
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Affiliation(s)
- Margarida Freitas-Silva
- Department of Medicine, Centro Hospitalar São João, Porto, Portugal.,FMUP, Faculty of Medicine, University of Porto, Porto, Portugal
| | - Rui Medeiros
- FMUP, Faculty of Medicine, University of Porto, Porto, Portugal.,LPCC, Research Department Portuguese League against Cancer (Liga Portuguesa Contra O Cancro, Núcleo Regional Do Norte), Porto, Portugal.,CEBIMED, Faculty of Health Sciences, Fernando Pessoa University, Porto, Portugal.,Molecular Oncology and Viral Pathology Group, IPO-Porto Research Center (CI-IPOP), Portuguese Institute of Oncology of Porto (Ipo-porto), Porto, Portugal
| | - José Pedro L Nunes
- Department of Medicine, Centro Hospitalar São João, Porto, Portugal.,FMUP, Faculty of Medicine, University of Porto, Porto, Portugal
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85
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Abbas M, Haddad E, Hamer M, Nowrangi D, Zhang J, Pearce WJ, Tang J, Obenaus A. Acute Treatment With Gleevec Does Not Promote Early Vascular Recovery Following Intracerebral Hemorrhage in Adult Male Rats. Front Neurosci 2020; 14:46. [PMID: 32116501 PMCID: PMC7010856 DOI: 10.3389/fnins.2020.00046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 01/13/2020] [Indexed: 12/31/2022] Open
Abstract
Intracerebral hemorrhage (ICH) remains one of the most debilitating types of stroke and is characterized by a sudden bleeding from a ruptured blood vessel. ICH often results in high mortality and in survivors, permanent disability. Most studies have focused on neuroprotective strategies designed to minimize secondary consequences and prevent further pathology. Lacking is an understanding of how ICH acutely affects cerebrovascular components and their response to therapeutic interventions. We hypothesized that ICH alters cortical vessel complexity in the parenchyma adjacent to site of the initial vascular disruption and that vascular abnormalities would be mitigated by administration of the PDGFR inhibitor, Imatinib mesylate (Gleevec). Briefly, ICH was induced in male adult rats by injection of collagenase into basal ganglia, followed by Gleevec administration (60 mg/kg) 1 h after injury. Rats were then perfused using vessel painting methodology (Salehi et al., 2018b) to stain whole brain vascular networks at 1 day post-ICH. Axial and coronal wide field fluorescence microscopy was performed. Analyses for vascular features were undertaken and fractal analysis for vascular complexity. Data were collected from four groups of rats: Sham + Vehicle; Sham + Gleevec; ICH + Vehicle; ICH + Gleevec. Microscopy revealed that cortical vessels in both ipsi- and contralateral hemispheres exhibited significantly reduced density and branching by 22 and 34%, respectively. Fractal measures confirmed reduced complexity as well. Gleevec treatment further reduced vascular parameters, including reductions in vessel density in tissues adjacent to the ICH. The reductions in brain wide vascular networks after Gleevec in the current study after ICH is contrasted by previous reports of improved behavioral outcomes and decreased lCH lesion volumes Reductions in the vascular network after Gleevec may be involved in long-term repair mechanisms by pruning injured vessels to ultimately promote new vessel growth.
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Affiliation(s)
- Mohammed Abbas
- Department of Pediatrics, Loma Linda University, Loma Linda, CA, United States
| | - Elizabeth Haddad
- Department of Pediatrics, University of California, Irvine, Irvine, CA, United States
| | - Mary Hamer
- Department of Pediatrics, University of California, Irvine, Irvine, CA, United States
| | - Derek Nowrangi
- Department of Physiology and Pharmacology, Loma Linda University, Loma Linda, CA, United States
| | - John Zhang
- Department of Physiology and Pharmacology, Loma Linda University, Loma Linda, CA, United States
- Department of Anesthesiology, Loma Linda University, Loma Linda, CA, United States
- Department of Neurosurgery, Loma Linda University, Loma Linda, CA, United States
| | - William J. Pearce
- Center for Perinatal Biology, Loma Linda University, Loma Linda, CA, United States
| | - Jiping Tang
- Department of Physiology and Pharmacology, Loma Linda University, Loma Linda, CA, United States
| | - Andre Obenaus
- Department of Pediatrics, Loma Linda University, Loma Linda, CA, United States
- Department of Pediatrics, University of California, Irvine, Irvine, CA, United States
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86
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Choy KW, Tsai APY, Lin PBC, Wu MY, Lee C, Alias A, Pang CY, Liew HK. The Role of Urocortins in Intracerebral Hemorrhage. Biomolecules 2020; 10:biom10010096. [PMID: 31935997 PMCID: PMC7022917 DOI: 10.3390/biom10010096] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 12/31/2019] [Accepted: 01/02/2020] [Indexed: 12/22/2022] Open
Abstract
Intracerebral hemorrhage (ICH) causes an accumulation of blood in the brain parenchyma that disrupts the normal neurological function of the brain. Despite extensive clinical trials, no medical or surgical therapy has shown to be effective in managing ICH, resulting in a poor prognosis for the patients. Urocortin (UCN) is a 40-amino-acid endogenous neuropeptide that belongs to the corticotropin-releasing hormone (CRH) family. The effect of UCN is activated by binding to two G-protein coupled receptors, CRH-R1 and CRH-R2, which are expressed in brain neurons and glial cells in various brain regions. Current research has shown that UCN exerts neuroprotective effects in ICH models via anti-inflammatory effects, which generally reduced brain edema and reduced blood-brain barrier disruption. These effects gradually help in the improvement of the neurological outcome, and thus, UCN may be a potential therapeutic target in the treatment of ICH. This review summarizes the data published to date on the role of UCN in ICH and the possible protective mechanisms underlined.
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Affiliation(s)
- Ker Woon Choy
- Department of Anatomy, Faculty of Medicine, Universiti Teknologi MARA, Sungai Buloh 42300, Malaysia;
| | - Andy Po-Yi Tsai
- Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, IN 46202, USA; (A.P.-Y.T.); (P.B.-C.L.)
| | - Peter Bor-Chian Lin
- Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, IN 46202, USA; (A.P.-Y.T.); (P.B.-C.L.)
| | - Meng-Yu Wu
- Department of Emergency Medicine, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei 231, Taiwan;
- Department of Emergency Medicine, School of Medicine, Tzu Chi University, Hualien 970, Taiwan
| | - Chihyi Lee
- College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60607, USA;
| | - Aspalilah Alias
- Department of Basic Sciences and Oral Biology, Faculty of Dentistry, Universiti Sains Islam Malaysia, Nilai 71800, Malaysia;
| | - Cheng-Yoong Pang
- Department of Medical Research, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, No. 707, Section 3, Zhong-yang Road, Hualien 970, Taiwan
- CardioVascular Research Center, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien 970, Taiwan
- Institute of Medical Sciences, Tzu Chi University, Hualien 970, Taiwan
- Correspondence: (C.-Y.P.); or (H.-K.L.); Tel.: +886-3-8561825 (ext. 15911) (H.-K.L.); Fax: +886-3-8562019 (H.-K.L.)
| | - Hock-Kean Liew
- Department of Medical Research, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, No. 707, Section 3, Zhong-yang Road, Hualien 970, Taiwan
- CardioVascular Research Center, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien 970, Taiwan
- PhD Program in Pharmacology and Toxicology, Tzu Chi University, Hualien 970, Taiwan
- Neuro-Medical Scientific Center, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien 970, Taiwan
- Correspondence: (C.-Y.P.); or (H.-K.L.); Tel.: +886-3-8561825 (ext. 15911) (H.-K.L.); Fax: +886-3-8562019 (H.-K.L.)
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87
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Zhao C, Ma J, Wang Z, Li H, Shen H, Li X, Chen G. Mfsd2a Attenuates Blood-Brain Barrier Disruption After Sub-arachnoid Hemorrhage by Inhibiting Caveolae-Mediated Transcellular Transport in Rats. Transl Stroke Res 2020; 11:1012-1027. [PMID: 31907728 DOI: 10.1007/s12975-019-00775-y] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 12/09/2019] [Accepted: 12/20/2019] [Indexed: 02/06/2023]
Abstract
Blood-brain barrier (BBB) disruption is one of the critical mechanisms of brain injury induced by subarachnoid hemorrhage (SAH). Past studies have often focused on the tight junctions of endothelial cells. However, low transcellular transport levels also play an important role in the normal functioning of the BBB. Major facilitator superfamily domain-containing 2a (Mfsd2a) has been demonstrated to be essential for the maintenance of the normal BBB. Our present study aimed to explore the roles and mechanisms of Mfsd2a in BBB disruption after SAH. In this study, a prechiasmatic cistern single-injection model was used to produce experimental SAH in Sprague-Dawley rats. Specific small-interfering RNA and plasmids were used to downregulate and upregulate the expression of Mfsd2a prior to assessments in our SAH model. Omega-3 fatty acid deficiency diet was used to reduce DHA in rat brain. The expression level of Mfsd2a decreased significantly after SAH and reached its lowest level at 72 h post-SAH, which then gradually recovered. At 72 h after SAH, BBB function was disrupted; upregulation of Mfsd2a reversed this damage, whereas downregulation of Mfsd2a exacerbated this damage. These effects were primarily mediated through transcellular transport, especially for changes in caveolae compared to those of tight junctions. After stopping the supply of omega-3 fatty acids, the effect of Mfsd2a on inhibition of caveolae and protection of the blood-brain barrier was eliminated. Taken together, Mfsd2a inhibits caveolae-based transcellular transport by transporting omega-3 fatty acids to protect the BBB after SAH.
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Affiliation(s)
- Chongshun Zhao
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, 188 Shizi Street,, Suzhou, 215006, Jiangsu Province, China
| | - Junwei Ma
- Department of Neurosurgery, The Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266003, Shandong Province, China
| | - Zhong Wang
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, 188 Shizi Street,, Suzhou, 215006, Jiangsu Province, China
| | - Haiying Li
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, 188 Shizi Street,, Suzhou, 215006, Jiangsu Province, China
| | - Haitao Shen
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, 188 Shizi Street,, Suzhou, 215006, Jiangsu Province, China
| | - Xiang Li
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, 188 Shizi Street,, Suzhou, 215006, Jiangsu Province, China.
| | - Gang Chen
- Department of Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, 188 Shizi Street,, Suzhou, 215006, Jiangsu Province, China.
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88
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Li Y, Wu P, Bihl JC, Shi H. Underlying Mechanisms and Potential Therapeutic Molecular Targets in Blood-Brain Barrier Disruption after Subarachnoid Hemorrhage. Curr Neuropharmacol 2020; 18:1168-1179. [PMID: 31903882 PMCID: PMC7770641 DOI: 10.2174/1570159x18666200106154203] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 12/18/2019] [Accepted: 01/04/2020] [Indexed: 01/01/2023] Open
Abstract
Aneurysmal subarachnoid hemorrhage (aSAH) is a subtype of hemorrhagic stroke with significant morbidity and mortality. Aneurysmal bleeding causes elevated intracranial pressure, decreased cerebral blood flow, global cerebral ischemia, brain edema, blood component extravasation, and accumulation of breakdown products. These post-SAH injuries can disrupt the integrity and function of the blood-brain barrier (BBB), and brain tissues are directly exposed to the neurotoxic blood contents and immune cells, which leads to secondary brain injuries including inflammation and oxidative stress, and other cascades. Though the exact mechanisms are not fully clarified, multiple interconnected and/or independent signaling pathways have been reported to be involved in BBB disruption after SAH. In addition, alleviation of BBB disruption through various pathways or chemicals has a neuroprotective effect on SAH. Hence, BBB permeability plays an important role in the pathological course and outcomes of SAH. This review discusses the recent understandings of the underlying mechanisms and potential therapeutic targets in BBB disruption after SAH, emphasizing the dysfunction of tight junctions and endothelial cells in the development of BBB disruption. The emerging molecular targets, including toll-like receptor 4, netrin-1, lipocalin-2, tropomyosin-related kinase receptor B, and receptor tyrosine kinase ErbB4, are also summarized in detail. Finally, we discussed the emerging treatments for BBB disruption after SAH and put forward our perspectives on future research.
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Affiliation(s)
| | | | - Ji C. Bihl
- Address correspondence to these authors at the Department of Pharmacology & Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, Ohio, 45435, USA; Tel: 011-01-9377755243; Fax: 011-01-9377757221; E-mail: and Department of Neurosurgery, First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China; Tel: +86-15545107889; E-mail:
| | - Huaizhang Shi
- Address correspondence to these authors at the Department of Pharmacology & Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, Ohio, 45435, USA; Tel: 011-01-9377755243; Fax: 011-01-9377757221; E-mail: and Department of Neurosurgery, First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang, China; Tel: +86-15545107889; E-mail:
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89
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Marzolini S, Robertson AD, Oh P, Goodman JM, Corbett D, Du X, MacIntosh BJ. Aerobic Training and Mobilization Early Post-stroke: Cautions and Considerations. Front Neurol 2019; 10:1187. [PMID: 31803129 PMCID: PMC6872678 DOI: 10.3389/fneur.2019.01187] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2019] [Accepted: 10/25/2019] [Indexed: 12/14/2022] Open
Abstract
Knowledge gaps exist in how we implement aerobic exercise programs during the early phases post-stroke. Therefore, the objective of this review was to provide evidence-based guidelines for pre-participation screening, mobilization, and aerobic exercise training in the hyper-acute and acute phases post-stroke. In reviewing the literature to determine safe timelines of when to initiate exercise and mobilization we considered the following factors: arterial blood pressure dysregulation, cardiac complications, blood-brain barrier disruption, hemorrhagic stroke transformation, and ischemic penumbra viability. These stroke-related impairments could intensify with inappropriate mobilization/aerobic exercise, hence we deemed the integrity of cerebral autoregulation to be an essential physiological consideration to protect the brain when progressing exercise intensity. Pre-participation screening criteria are proposed and countermeasures to protect the brain from potentially adverse circulatory effects before, during, and following mobilization/exercise sessions are introduced. For example, prolonged periods of standing and static postures before and after mobilization/aerobic exercise may elicit blood pooling and/or trigger coagulation cascades and/or cerebral hypoperfusion. Countermeasures such as avoiding prolonged standing or incorporating periodic lower limb movement to activate the venous muscle pump could counteract blood pooling after an exercise session, minimize activation of the coagulation cascade, and mitigate potential cerebral hypoperfusion. We discuss patient safety in light of the complex nature of stroke presentations (i.e., type, severity, and etiology), medical history, comorbidities such as diabetes, cardiac manifestations, medications, and complications such as anemia and dehydration. The guidelines are easily incorporated into the care model, are low-risk, and use minimal resources. These and other strategies represent opportunities for improving the safety of the activity regimen offered to those in the early phases post-stroke. The timeline for initiating and progressing exercise/mobilization parameters are contingent on recovery stages both from neurobiological and cardiovascular perspectives, which to this point have not been specifically considered in practice. This review includes tailored exercise and mobilization prescription strategies and precautions that are not resource intensive and prioritize safety in stroke recovery.
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Affiliation(s)
- Susan Marzolini
- KITE, Toronto Rehab-University Health Network, Toronto, ON, Canada.,Department of Exercise Sciences, Faculty of Kinesiology and Physical Education, University of Toronto, Toronto, ON, Canada.,Canadian Partnership for Stroke Recovery, Toronto, ON, Canada
| | - Andrew D Robertson
- Schlegel-University of Waterloo Research Institute for Aging, University of Waterloo, Waterloo, ON, Canada.,Department of Kinesiology, University of Waterloo, Waterloo, ON, Canada
| | - Paul Oh
- KITE, Toronto Rehab-University Health Network, Toronto, ON, Canada.,Department of Exercise Sciences, Faculty of Kinesiology and Physical Education, University of Toronto, Toronto, ON, Canada.,Canadian Partnership for Stroke Recovery, Toronto, ON, Canada
| | - Jack M Goodman
- KITE, Toronto Rehab-University Health Network, Toronto, ON, Canada.,Department of Exercise Sciences, Faculty of Kinesiology and Physical Education, University of Toronto, Toronto, ON, Canada
| | - Dale Corbett
- Canadian Partnership for Stroke Recovery, Toronto, ON, Canada.,Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, ON, Canada
| | - Xiaowei Du
- KITE, Toronto Rehab-University Health Network, Toronto, ON, Canada.,School of Kinesiology and Health Studies, Queen's University, Kingston, ON, Canada
| | - Bradley J MacIntosh
- Canadian Partnership for Stroke Recovery, Toronto, ON, Canada.,Sunnybrook Health Sciences Center, Toronto, ON, Canada
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90
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Stamova B, Ander BP, Jickling G, Hamade F, Durocher M, Zhan X, Liu DZ, Cheng X, Hull H, Yee A, Ng K, Shroff N, Sharp FR. The intracerebral hemorrhage blood transcriptome in humans differs from the ischemic stroke and vascular risk factor control blood transcriptomes. J Cereb Blood Flow Metab 2019; 39:1818-1835. [PMID: 29651892 PMCID: PMC6727143 DOI: 10.1177/0271678x18769513] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Understanding how the blood transcriptome of human intracerebral hemorrhage (ICH) differs from ischemic stroke (IS) and matched controls (CTRL) will improve understanding of immune and coagulation pathways in both disorders. This study examined RNA from 99 human whole-blood samples using GeneChip® HTA 2.0 arrays to assess differentially expressed transcripts of alternatively spliced genes between ICH, IS and CTRL. We used a mixed regression model with FDR-corrected p(Dx) < 0.2 and p < 0.005 and |FC| > 1.2 for individual comparisons. For time-dependent analyses, subjects were divided into four time-points: 0(CTRL), <24 h, 24-48 h, >48 h; 489 transcripts were differentially expressed between ICH and CTRL, and 63 between IS and CTRL. ICH had differentially expressed T-cell receptor and CD36 genes, and iNOS, TLR, macrophage, and T-helper pathways. IS had more non-coding RNA. ICH and IS both had angiogenesis, CTLA4 in T lymphocytes, CD28 in T helper cells, NFAT regulation of immune response, and glucocorticoid receptor signaling pathways. Self-organizing maps revealed 4357 transcripts changing expression over time in ICH, and 1136 in IS. Understanding ICH and IS transcriptomes will be useful for biomarker development, treatment and prevention strategies, and for evaluating how well animal models recapitulate human ICH and IS.
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Affiliation(s)
- Boryana Stamova
- 1 Department of Neurology, School of Medicine, University of California at Davis, Sacramento, CA, USA
| | - Bradley P Ander
- 1 Department of Neurology, School of Medicine, University of California at Davis, Sacramento, CA, USA
| | - Glen Jickling
- 1 Department of Neurology, School of Medicine, University of California at Davis, Sacramento, CA, USA.,2 Department of Medicine, University of Alberta, Edmonton, Canada
| | - Farah Hamade
- 1 Department of Neurology, School of Medicine, University of California at Davis, Sacramento, CA, USA
| | - Marc Durocher
- 1 Department of Neurology, School of Medicine, University of California at Davis, Sacramento, CA, USA
| | - Xinhua Zhan
- 1 Department of Neurology, School of Medicine, University of California at Davis, Sacramento, CA, USA
| | - Da Zhi Liu
- 1 Department of Neurology, School of Medicine, University of California at Davis, Sacramento, CA, USA
| | - Xiyuan Cheng
- 1 Department of Neurology, School of Medicine, University of California at Davis, Sacramento, CA, USA
| | - Heather Hull
- 1 Department of Neurology, School of Medicine, University of California at Davis, Sacramento, CA, USA
| | - Alan Yee
- 1 Department of Neurology, School of Medicine, University of California at Davis, Sacramento, CA, USA
| | - Kwan Ng
- 1 Department of Neurology, School of Medicine, University of California at Davis, Sacramento, CA, USA
| | - Natasha Shroff
- 1 Department of Neurology, School of Medicine, University of California at Davis, Sacramento, CA, USA
| | - Frank R Sharp
- 1 Department of Neurology, School of Medicine, University of California at Davis, Sacramento, CA, USA
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Noroozi-Aghideh A, Kashani khatib Z, Naderi M, Dorgalaleh A, Yaghmaie M, Paryan M, Alizadeh S. Expression and CpG island methylation pattern of MMP-2 and MMP-9 genes in patients with congenital factor XIII deficiency and intracranial hemorrhage. Hematology 2019; 24:601-605. [DOI: 10.1080/16078454.2019.1654181] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Affiliation(s)
- Ali Noroozi-Aghideh
- Hematology Department, Allied Medical School, Tehran University of Medical Sciences, Tehran, Iran
- Hematology Department, AJA University of Medical Sciences, Tehran, Iran
| | - Zahra Kashani khatib
- Blood Transfusion Research Center, High Institute for Research and Education in Transfusion Medicine (IBTO), Tehran, Iran
| | - Majid Naderi
- Ali-Ebne Abitaleb Hospital, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Akbar Dorgalaleh
- Hematology Department, Allied Medical School, Iran University of Medical Sciences, Tehran, Iran
| | - Marjan Yaghmaie
- Hematology-Oncology and Stem Cell Transplantation Research Center, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahdi Paryan
- Department of Research and Development, Production and Research Complex, Pasteur Institute of Iran, Tehran, Iran
| | - Shaban Alizadeh
- Hematology Department, Allied Medical School, Tehran University of Medical Sciences, Tehran, Iran
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92
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Tiani KA, Stover PJ, Field MS. The Role of Brain Barriers in Maintaining Brain Vitamin Levels. Annu Rev Nutr 2019; 39:147-173. [DOI: 10.1146/annurev-nutr-082018-124235] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
It is increasingly recognized that tissue-specific nutrient deficiencies can exist in the absence of whole-body deficiency and that these deficiencies may result from disease or disease-related physiological processes. Brain and central nervous system tissues require adequate nutrient levels to function. Many nutrients are concentrated in the cerebrospinal fluid relative to the serum in healthy individuals, and other nutrients resist depletion in the presence of whole-body nutrient depletion. The endothelial, epithelial, and arachnoid brain barriers work in concert to selectively transport, concentrate, and maintain levels of the specific nutrients required by the brain while also blocking the passage of blood-borne toxins and pathogens to brain and central nervous system tissues. These barriers preserve nutrient levels within the brain and actively concentrate nutrients within the cerebrospinal fluid and brain. The roles of physical and energetic barriers, including the blood–brain and blood–nerve barriers, in maintaining brain nutrient levels in health and disease are discussed.
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Affiliation(s)
- Kendra A. Tiani
- Division of Nutritional Sciences, Cornell University, Ithaca, New York 14853, USA
| | - Patrick J. Stover
- College of Agriculture and Life Sciences, Texas A & M University, College Station, Texas 77843-2142, USA
| | - Martha S. Field
- Division of Nutritional Sciences, Cornell University, Ithaca, New York 14853, USA
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93
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Yu Z, Zheng J, Guo R, Ma L, You C, Li H. Prognostic impact of leukocytosis in intracerebral hemorrhage: A PRISMA-compliant systematic review and meta-analysis. Medicine (Baltimore) 2019; 98:e16281. [PMID: 31305410 PMCID: PMC6641796 DOI: 10.1097/md.0000000000016281] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Intracerebral hemorrhage (ICH) is correlated with high rate of death and poor outcome. Leukocytes participate in secondary brain injury in ICH. It is still not clear that whether leukocytosis can predict outcome in ICH. This study was performed to summarize that current evidences about the association between baseline leukocytosis and outcome in ICH patients in a systematic review and meta-analysis. METHODS Published studies were searched in 5 databases. Original studies about association between baseline leukocytosis and outcome in ICH were included. Pooled odds ratios (ORs) and their 95% confidence intervals (CIs) were achieved to evaluate the association between leukocytosis and prognosis. RESULTS A total of 19 eligible studies with 6417 patients were analyzed in this study. Meta-analysis showed baseline leukocyte count increase was significantly associated with worse overall (OR = 1.13, 95% CI 1.05-1.21, P = .001), short-term (OR = 1.20, 95% CI 1.05-1.38, P = .009), and long-term functional outcome (OR = 1.12, 95% CI 1.04-1.20, P = .004). Baseline leukocytosis defined by cut-off values had significant association with worse overall functional outcome (OR = 1.95, 95% CI 1.01-3.76, P = .046). Baseline leukocyte count increase was significantly associated with higher overall (OR = 1.10, 95% CI 1.02-1.18, P = .011) and long-term mortality (OR = 1.12, 95% CI 1.03-1.22, P = .007). Baseline leukocytosis defined by cut-off values was significantly associated with higher overall (OR = 1.67, 95% CI 1.23-2.27, P = .001) and short-term mortality (OR = 1.74, 95% CI 1.12-2.70, P = .014). CONCLUSION Baseline leukocytosis could be helpful in predicting prognosis in ICH patients. However, its prognostic value should be verified by further studies.
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94
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Deng L, Gao X, Fan G, Yang C. Effects of GDNF-Transfected Marrow Stromal Cells on Rats with Intracerebral Hemorrhage. J Stroke Cerebrovasc Dis 2019; 28:2555-2562. [PMID: 31248739 DOI: 10.1016/j.jstrokecerebrovasdis.2019.06.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 05/03/2019] [Accepted: 06/02/2019] [Indexed: 10/26/2022] Open
Abstract
OBJECTIVE The present study aimed to investigate the effects of Mesenchymal stem cells/glial cell line derived neurotrophic factor (MSCs/GDNF) transplantation on nerve reconstruction in rats with intracerebral hemorrhage. METHODS GDNF transduction to MSCs was using adenovirus vector pAdEasy-1-pAdTrack-CMV prepared. Intracerebral hemorrhage (ICH) was induced by injection of collagenase and heparin into the caudate putamen. At the third day after a collagenase-induced ICH, adult male SD rats were randomly divided into saline group, MSCs group and MSCs/GDNF group. Immunofluorescence and RT-PCR were performed to detect the differentiation of MSCs or MSCs with an adenovirus vector encoding GDNF gene in vivo and in vitro. RESULT After 6 hours of induction, both MSCs and MSCs/GDNF expressed neuro or glial specific markers and synaptic-associated proteins (SYN, GAP-43, PSD-95); additionally, they secreted bioactive compounds (BDNF, NGF-β). MSCs/GDNF transplantation, compared to MSCs and saline solution injection, significantly improved neurological functions after ICH. The grafted MSCs or MSCs/GDNF survived in the striatum after 2 weeks of transplantation and expressed the neural cell-specific biomarkers NSE, MAP2, and GFAP. CONCLUSION These findings demonstrate that MSCs/GDNF transplantation contributes to improved neurological function in experimental ICH rats. The mechanisms are possibly due to neuronal replacement and enhanced neurotrophic factor secretion.
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Affiliation(s)
- Li Deng
- Department of Neurobiology, Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, Sichuan, China
| | - Xiaoqing Gao
- Department of Neurobiology, Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, Sichuan, China
| | - Guangbi Fan
- Department of Neurobiology, Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, Sichuan, China
| | - Chaoxian Yang
- Department of Neurobiology, Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, Sichuan, China.
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95
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Zhao S, Liu Z, Yu Z, Wu X, Li R, Tang X. BIO alleviates inflammation through inhibition of GSK-3β in a rat model of intracerebral hemorrhage. J Neurosurg 2019; 133:383-391. [PMID: 31226691 DOI: 10.3171/2019.4.jns183501] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Accepted: 04/08/2019] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Inflammation plays a key role in secondary brain damage following intracerebral hemorrhage (ICH). Glycogen synthase kinase-3β (GSK-3β) plays a strong proinflammatory role in many CNS diseases, including stroke. The present study was undertaken to examine the effects of 6-bromoindirubin-3'-oxime (BIO), a specific inhibitor of GSK-3β, on inflammation in ICH rats. METHODS An ICH rat model was induced by autologous whole-blood injection into the striatum. First, 10, 20, 40, 60, 80, or 100 μg/kg BIO was applied to ICH animals to determine an optimal dosage for producing sufficient GSK-3β inhibition in rat ipsilateral hippocampus by Western blotting. Second, 40 μg/kg BIO was applied to ICH rats for 1, 3, 7, or 14 days, respectively, to determine a suitable intervention time course of BIO by Western blotting analysis on GSK-3β. Third, Western blotting and enzyme-linked immunosorbent assay were used for quantification of inflammation-related factors upstream or downstream of GSK-3β in rat ipsilateral hippocampus. Then, immunohistochemical staining was applied to detect activated microglia and apoptotic cells in rat ipsilateral hippocampus. Last, neurobehavioral tests were performed to assess the sensorimotor impairments in the ICH rats. RESULTS The results show that BIO 1) blocked GSK-3βTyr216 phosphorylation/activation, thus stabilizing β-catenin, increasing upstream brain-derived neurotrophic factor and downstream heat shock protein 70 levels, and decreasing the levels of nuclear factor-κB p65 and cyclooxygenase 2; 2) decreased the levels of the proinflammatory cytokines tumor necrosis factor-α and interleukin (IL)-1β and IL-6 and elevated the level of antiinflammatory cytokine IL-10; 3) inhibited microglia activation and cell apoptosis; and 4) improved the sensorimotor deficits of ICH rats. CONCLUSIONS BIO posttreatment inhibited microglia activation, prevented inflammation and hippocampal cell death, and ameliorated functional and morphological outcomes in a rat ICH model through inactivation of GSK-3β.
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96
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Endothelial progenitor cells: Potential novel therapeutics for ischaemic stroke. Pharmacol Res 2019; 144:181-191. [DOI: 10.1016/j.phrs.2019.04.017] [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: 01/31/2019] [Revised: 04/08/2019] [Accepted: 04/16/2019] [Indexed: 01/15/2023]
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97
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Fang Y, Tian Y, Huang Q, Wan Y, Xu L, Wang W, Pan D, Zhu S, Xie M. Deficiency of TREK-1 potassium channel exacerbates blood-brain barrier damage and neuroinflammation after intracerebral hemorrhage in mice. J Neuroinflammation 2019; 16:96. [PMID: 31072336 PMCID: PMC6506965 DOI: 10.1186/s12974-019-1485-5] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Accepted: 04/25/2019] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Intracerebral hemorrhage (ICH) is a devastating medical emergency with high mortality and severe neurological deficit. ICH-related poor outcomes are due to a combination of pathological processes that could be complicated by secondary insults. TWIK-related K+ channel 1 (TREK-1) is a two-pore-domain potassium channel that is highly expressed in the mammalian nervous system. Previous studies have shown that TREK-1 channels play important roles in various central nervous system diseases. However, its role in the secondary injuries after intracerebral hemorrhage remains unknown. In this study, we explored the function of TREK-1 in secondary blood-brain barrier injuries and neuroinflammation after intracerebral hemorrhage in mice. METHODS Adult male TREK-1-/- mice and WT mice were subjected to a collagenase-induced ICH model. Immunostaining, western blot, and enzyme-linked immunosorbent assay were used to assess inflammatory infiltration and neuronal death. Blood-brain barrier compromise was assessed using electron microscopy and Evans Blue dye injection on days 1 and 3 after intracerebral hemorrhage. Magnetic resonance imaging and behavioral assessments were conducted to evaluate the neurologic damage and recovery after intracerebral hemorrhage. RESULTS Genetic deficiency of TREK-1 channel exacerbated blood-brain barrier impairment and promoted cerebral edema after intracerebral hemorrhage. Meanwhile, TREK-1 deficiency aggravated focal inflammatory featured by the increased recruitment of microglia and neutrophils, the enhanced secretion of proinflammatory factors interleukin-1 beta (IL-1β), tumor necrosis factor alpha (TNF-α), and cell adhesion molecules (CAMs). Furthermore, TREK-1 deficiency promoted neuronal injury and neurological impairment. CONCLUSIONS These results establish the first in vivo evidence for the protective role of TREK-1 in blood-brain barrier injury and neuroinflammation after intracerebral hemorrhage. TREK-1 may thereby be harnessed to a potential therapeutical target for the treatment of intracerebral hemorrhage.
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Affiliation(s)
- Yongkang Fang
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China, 430030
| | - Yeye Tian
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China, 430030
| | - Qibao Huang
- College of medicine, Wuhan University of Science and Technology, Wuhan, 430081, People's Republic of China
| | - Yue Wan
- Department of Neurology, The Third People's Hospital of Hubei Province, Wuhan, People's Republic of China, 430030
| | - Li Xu
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China, 430030
| | - Wei Wang
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China, 430030
| | - Dengji Pan
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China, 430030
| | - Suiqiang Zhu
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China, 430030.
| | - Minjie Xie
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China, 430030.
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98
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Glibenclamide, a Sur1-Trpm4 antagonist, does not improve outcome after collagenase-induced intracerebral hemorrhage. PLoS One 2019; 14:e0215952. [PMID: 31042750 PMCID: PMC6494051 DOI: 10.1371/journal.pone.0215952] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Accepted: 04/11/2019] [Indexed: 12/16/2022] Open
Abstract
The sulfonylurea 1 transient receptor potential melastatin 4 (Sur1-Trpm4) receptor is selectively expressed after intracerebral hemorrhage (ICH). This upregulation contributes to increases in intracellular sodium. Water follows sodium through aquaporin channels, leading to cytotoxic edema. Even after edema is thought to have resolved, ionic dyshomeostasis persists, as does blood-brain barrier (BBB) damage. Glibenclamide, a hypoglycemic agent that inhibits Sur1-Trpm4, has been shown to reduce BBB damage and edema following infusion of autologous blood into the brain (ICH) as well as after other brain injuries. In order to further assess efficacy, we used the collagenase ICH model in rats to test whether glibenclamide reduces edema, attenuates ion dyshomeostasis, improves BBB damage, and reduces lesion volume. We tested a widely-used glibenclamide dose shown effective in other studies (10 μg/kg loading dose followed by 200 ng/hr for up to 7 days). Early initiation of glibenclamide did not significantly impact edema (72 hours), BBB permeability (72 hours), or lesion volume after ICH (28 days). Recovery from neurological impairments was also not improved by glibenclamide. These results suggest that glibenclamide will not improve outcome in ICH. However, the treatment appeared to be safe as there was no effect on bleeding or other physiological variables.
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99
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Imai T, Iwata S, Hirayama T, Nagasawa H, Nakamura S, Shimazawa M, Hara H. Intracellular Fe 2+ accumulation in endothelial cells and pericytes induces blood-brain barrier dysfunction in secondary brain injury after brain hemorrhage. Sci Rep 2019; 9:6228. [PMID: 30996325 PMCID: PMC6470176 DOI: 10.1038/s41598-019-42370-z] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Accepted: 03/27/2019] [Indexed: 12/24/2022] Open
Abstract
After intracranial hemorrhage (ICH), iron is released from the hematoma and induces secondary brain injury. However, the detail effect of iron on blood-brain barrier (BBB) function is still unknown. We investigated whether hemoglobin (Hb), ferrous ammonium sulfate (FAS) or hemin which contains iron have the detrimental effect on both human brain microvascular endothelial cells and pericytes by cellular function analysis in vitro. We developed an iron (Fe2+)-detectable probe, Si-RhoNox-1, to investigate intracellular Fe2+ accumulation (Fe2+intra). After FAS treatment, there was the correlation between Fe2+intra and cell death. Moreover, Hb or hemin treatment induced cell death, increased reactive oxygen species and promoted Fe2+intra in both cells. These changes were inhibited by the Fe2+ chelator, 2,2′-bipyridil (BP). Furthermore, hemin induced endothelial barrier dysfunction via disruption of junction integrity. Based on in vitro studies, we used a hemin-injection ICH mice model in vivo. Hemin injection (10 mM/10 µL, i.c.) induced deleterious effects including BBB hyper-permeability, neuronal deficits, neuronal damage, altered proteins expression, and Fe2+intra in BBB composed cells. Lastly, BP (40 mg/kg, i.p.) administration attenuated neuronal deficits at 3 days after surgery. Collectively, Hb or hemin damaged BBB composed cells via Fe2+intra. Therefore, the regulation of the Fe2+ movement in BBB might be effective for treatment of ICH.
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Affiliation(s)
- Takahiko Imai
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, 501-1196, Japan
| | - Sena Iwata
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, 501-1196, Japan
| | - Tasuku Hirayama
- Pharmaceutical and Medicinal Chemistry, Gifu Pharmaceutical University, Gifu, 501-1196, Japan
| | - Hideko Nagasawa
- Pharmaceutical and Medicinal Chemistry, Gifu Pharmaceutical University, Gifu, 501-1196, Japan
| | - Shinsuke Nakamura
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, 501-1196, Japan
| | - Masamitsu Shimazawa
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, 501-1196, Japan
| | - Hideaki Hara
- Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, 501-1196, Japan.
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100
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Xu F, Shen G, Su Z, He Z, Yuan L. Glibenclamide ameliorates the disrupted blood-brain barrier in experimental intracerebral hemorrhage by inhibiting the activation of NLRP3 inflammasome. Brain Behav 2019; 9:e01254. [PMID: 30859754 PMCID: PMC6456786 DOI: 10.1002/brb3.1254] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 12/15/2018] [Accepted: 02/09/2019] [Indexed: 01/16/2023] Open
Abstract
BACKGROUND Glibenclamide is a widely used sulfonylurea drug prescribed to treat type II diabetes mellitus. Previous studies have demonstrated that glibenclamide has neuroprotective effects in central nervous system injury. However, the exact mechanism by which glibenclamide acts on the blood-brain barrier (BBB) after intracerebral hemorrhage (ICH) remains unclear. The purpose of this study was to validate the neuroprotective effects of glibenclamide on ICH and to explore the mechanisms underlying these effects. METHODS We investigated the effects of glibenclamide on experimental ICH using the autologous blood infusion model. Glibenclamide was administrated either immediately or 2 hr after ICH. Brain edema was quantified using the wet-dry method 3 days after injury. BBB integrity was evaluated by Evans Blue extravasation and degradation of the tight junction protein zona occludens-1 (ZO-1). mRNA levels of inflammatory cytokines were determined by quantitative polymerase chain reaction. Activation of the nucleotide-binding oligomerization domain-like receptor with a pyrin domain 3 (NLRP3) inflammasome and cell viability were also measured in cerebral microvascular endothelial b.End3 cells exposed to hemin. Neurological changes were evaluated by the Garcia score and rotarod test. RESULTS After ICH, the brain water content, Evans Blue extravasation, and inflammatory cytokines decreased significantly in the ipsilateral hemisphere of the experimental compared to the vehicle group. Glibenclamide treatment and NLRP3 knockdown significantly reduced hemin-induced activation of the NLRP3 inflammasome, release of extracellular lactate dehydrogenase, apoptosis, and loss of ZO-1 in b.End3 cells. However, NLRP3 knockdown abolished the protective effect of glibenclamide. CONCLUSION Glibenclamide maintained BBB integrity in experimental ICH by inhibiting the activation of the NLRP3 inflammasome in microvessel endothelial cells. Our findings will contribute to elucidating the pharmacological mechanism of action of glibenclamide and to developing a novel therapy for clinical ICH.
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Affiliation(s)
- Fulin Xu
- Department of Neurosurgery, Minhang District Central hospital, Shanghai, China
| | - Gang Shen
- Department of Neurosurgery, Minhang District Central hospital, Shanghai, China
| | - Zuopeng Su
- Department of Neurosurgery, Minhang District Central hospital, Shanghai, China
| | - Zijian He
- Department of Neurosurgery, Minhang District Central hospital, Shanghai, China
| | - Lutao Yuan
- Department of Neurosurgery, Minhang District Central hospital, Shanghai, China
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