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Imenez Silva PH, Pepin M, Figurek A, Gutiérrez-Jiménez E, Bobot M, Iervolino A, Mattace-Raso F, Hoorn EJ, Bailey MA, Hénaut L, Nielsen R, Frische S, Trepiccione F, Hafez G, Altunkaynak HO, Endlich N, Unwin R, Capasso G, Pesic V, Massy Z, Wagner CA. Animal models to study cognitive impairment of chronic kidney disease. Am J Physiol Renal Physiol 2024; 326:F894-F916. [PMID: 38634137 DOI: 10.1152/ajprenal.00338.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 03/11/2024] [Accepted: 04/04/2024] [Indexed: 04/19/2024] Open
Abstract
Mild cognitive impairment (MCI) is common in people with chronic kidney disease (CKD), and its prevalence increases with progressive loss of kidney function. MCI is characterized by a decline in cognitive performance greater than expected for an individual age and education level but with minimal impairment of instrumental activities of daily living. Deterioration can affect one or several cognitive domains (attention, memory, executive functions, language, and perceptual motor or social cognition). Given the increasing prevalence of kidney disease, more and more people with CKD will also develop MCI causing an enormous disease burden for these individuals, their relatives, and society. However, the underlying pathomechanisms are poorly understood, and current therapies mostly aim at supporting patients in their daily lives. This illustrates the urgent need to elucidate the pathogenesis and potential therapeutic targets and test novel therapies in appropriate preclinical models. Here, we will outline the necessary criteria for experimental modeling of cognitive disorders in CKD. We discuss the use of mice, rats, and zebrafish as model systems and present valuable techniques through which kidney function and cognitive impairment can be assessed in this setting. Our objective is to enable researchers to overcome hurdles and accelerate preclinical research aimed at improving the therapy of people with CKD and MCI.
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Affiliation(s)
- Pedro H Imenez Silva
- Institute of Physiology, University of Zurich, Zurich, Switzerland
- Division of Nephrology and Transplantation, Department of Internal Medicine, Erasmus Medical Center, University Medical Center, Rotterdam, The Netherlands
| | - Marion Pepin
- Institut National de la Santé et de la Recherche Médicale U-1018 Centre de Recherche en Épidémiologie et Santé des Population, Équipe 5, Paris-Saclay University, Versailles Saint-Quentin-en-Yvelines University, Villejuif, France
- Department of Geriatrics, Centre Hospitalier Universitaire Ambroise Paré, Assistance Publique-Hôpitaux de Paris Université Paris-Saclay, Paris, France
| | - Andreja Figurek
- Institute of Anatomy, University of Zurich, Zurich, Switzerland
| | - Eugenio Gutiérrez-Jiménez
- Center for Functionally Integrative Neuroscience, Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
| | - Mickaël Bobot
- Centre de Néphrologie et Transplantation Rénale, Hôpital de la Conception, Assistance Publique-Hopitaux de Marseille, and INSERM 1263, Institut National de la Recherche Agronomique 1260, C2VN, Aix-Marseille Universitaire, Marseille, France
| | - Anna Iervolino
- Department of Translational Medical Sciences, University of Campania 'Luigi Vanvitelli,' Naples, Italy
| | - Francesco Mattace-Raso
- Division of Geriatrics, Department of Internal Medicine, Erasmus MC University Medical Center, Rotterdam, The Netherlands
| | - Ewout J Hoorn
- Division of Nephrology and Transplantation, Department of Internal Medicine, Erasmus Medical Center, University Medical Center, Rotterdam, The Netherlands
| | - Matthew A Bailey
- Edinburgh Kidney, Centre for Cardiovascular Science, The University of Edinburgh, Edinburgh, United Kingdom
| | - Lucie Hénaut
- UR UPJV 7517, Jules Verne University of Picardie, Amiens, France
| | - Rikke Nielsen
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | | | - Francesco Trepiccione
- Department of Translational Medical Sciences, University of Campania 'Luigi Vanvitelli,' Naples, Italy
| | - Gaye Hafez
- Department of Pharmacology, Faculty of Pharmacy, Altinbas University, Istanbul, Turkey
| | - Hande O Altunkaynak
- Department of Pharmacology, Gulhane Faculty of Pharmacy, University of Health Sciences, Istanbul, Turkey
| | - Nicole Endlich
- Department of Anatomy and Cell Biology, University Medicine Greifswald, Greifswald, Germany
| | - Robert Unwin
- Department of Renal Medicine, Royal Free Hospital, University College London, London, United Kingdom
| | - Giovambattista Capasso
- Department of Translational Medical Sciences, University of Campania 'Luigi Vanvitelli,' Naples, Italy
- Biogem Research Institute, Ariano Irpino, Italy
| | - Vesna Pesic
- Department of Physiology, Faculty of Pharmacy, University of Belgrade, Belgrade, Serbia
| | - Ziad Massy
- Centre for Research in Epidemiology and Population Health, INSERM UMRS 1018, Clinical Epidemiology Team, University Paris-Saclay, University Versailles-Saint Quentin, Villejuif, France
- Department of Nephrology, Centre Hospitalier Universitaire Ambroise Paré, Assistance Publique-Hôpitaux de Paris Université Paris-Saclay, Paris, France
| | - Carsten A Wagner
- Institute of Physiology, University of Zurich, Zurich, Switzerland
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Guerin SP, Melbourne JK, Dang HQ, Shaji CA, Nixon K. Astrocyte Reactivity and Neurodegeneration in the Female Rat Brain Following Alcohol Dependence. Neuroscience 2023; 529:183-199. [PMID: 37598836 PMCID: PMC10810177 DOI: 10.1016/j.neuroscience.2023.08.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 08/04/2023] [Accepted: 08/09/2023] [Indexed: 08/22/2023]
Abstract
Recent evidence suggests that alcohol use disorder (AUD) may manifest itself differently in women compared to men. Women experience AUDs on an accelerated timeline and may have certain regional vulnerabilities. In male rats, neuronal cell death and astrocyte reactivity are noted following induction of alcohol dependence in an animal model of an AUD. However, the regional and temporal patterns of neurodegeneration and astrocyte reactivity have yet to be fully examined in females using this model. Therefore, adult female rats were exposed to a 4-day binge model of alcohol dependence followed by different periods of abstinence. Histological markers for FluoroJade B, a label of degenerating neurons, and vimentin, a marker for reactive astrocytes, were utilized. The expression of these markers in cortical and limbic regions was quantified immediately after their last dose (e.g., T0), or 2, 7, and 14 days later. Significant neuronal cell death was noted in the entorhinal cortex and the hippocampus, similar to previous reports in males, but also in several cortical regions not previously observed. Vimentin immunoreactivity was noted in the same regions as previously reported, in addition to three novel regions. Vimentin immunoreactivity also occurred at earlier and later time points in some cortical and hippocampal regions. These data suggest that both neuronal cell death and astrocyte reactivity could be more widespread in females compared to males. Therefore, this study provides a framework for specific regions and time points which should be examined in future studies of alcohol-induced damage that include female rats.
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Affiliation(s)
- Steven P Guerin
- The University of Texas at Austin, Division of Pharmacology & Toxicology, College of Pharmacy, Austin, TX 78712, United States
| | - Jennifer K Melbourne
- The University of Texas at Austin, Division of Pharmacology & Toxicology, College of Pharmacy, Austin, TX 78712, United States
| | - Huy Q Dang
- The University of Texas at Austin, Division of Pharmacology & Toxicology, College of Pharmacy, Austin, TX 78712, United States
| | - Chinchusha Anasooya Shaji
- The University of Texas at Austin, Division of Pharmacology & Toxicology, College of Pharmacy, Austin, TX 78712, United States
| | - Kimberly Nixon
- The University of Texas at Austin, Division of Pharmacology & Toxicology, College of Pharmacy, Austin, TX 78712, United States.
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Yilmazer-Hanke D, Ouali Alami N, Fang L, Klotz S, Kovacs GG, Pankratz H, Weis J, Katona I, Scheuerle A, Streit WJ, Del Tredici K. Differential Glial Chitotriosidase 1 and Chitinase 3-like Protein 1 Expression in the Human Primary Visual Cortex and Cerebellum after Global Hypoxia-Ischemia. Neuroscience 2022; 506:91-113. [PMID: 36332693 DOI: 10.1016/j.neuroscience.2022.10.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 10/15/2022] [Accepted: 10/20/2022] [Indexed: 11/06/2022]
Abstract
Here, we studied the neuroinflammation- and ischemia-related glial markers chitotriosidase 1 (CHIT1) and chitinase-3-like protein 1 (CHI3L1, alias YKL-40) in the human striate cortex and cerebellum at different time points after global hypoxic-ischemic brain injury (HIBI). Both regions differ considerably in their glial cell population but are supplied by the posterior circulation. CHIT1 and CHI3L1 expression was compared to changes in microglial (IBA1, CD68), astrocytic (GFAP, S100β), and neuronal markers (H&E, neurofilament heavy chain, NfH; calretinin, CALR) using immunohistochemistry and multiple-label immunofluorescence. Initial striatal cortical and cerebellar Purkinje cell damage, detectable already 1/2 d after HIBI, led to delayed neuronal death, whereas loss of cerebellar NfH-positive stellate and CALR-positive granule cells was variable. During the first week post-HIBI, a transient reduction of IBA1-positive microglia was observed in both regions, and fragmented/clasmatodendritic cerebellar Bergmann glia appeared. In long-term survivors, both brain regions displayed high densities of activated IBA1-positive cells and CD68-positive macrophages, which showed CHIT1 co-localization in the striate cortex. Furthermore, enlarged GFAP- and S100β-positive astroglia emerged in both regions around 9-10 d post-HIBI, i.e., along with clearance of dead neurons from the neuropil, although GFAP-/S100β-positive gemistocytic astrocytes that co-expressed CHI3L1 were found only in the striate cortex. Thus, only GFAP-/S100β-positive astrocytes in the striate cortex, but not cerebellar Bergmann glia, differentiated into CHI3L1-positive gemistocytes. CHIT1 was co-expressed almost entirely in macrophages in the striate cortex and not cerebellum of long-term survivors, thereby indicating that CHIT1 and CHI3L1 could be valuable biomarkers for monitoring the outcome of global HIBI.
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Affiliation(s)
- Deniz Yilmazer-Hanke
- Clinical Neuroanatomy, Neurology, School of Medicine, Ulm University, Ulm, Germany.
| | - Najwa Ouali Alami
- Clinical Neuroanatomy, Neurology, School of Medicine, Ulm University, Ulm, Germany
| | - Lubin Fang
- Clinical Neuroanatomy, Neurology, School of Medicine, Ulm University, Ulm, Germany
| | - Sigried Klotz
- Division of Neuropathology and Neurochemistry, Department of Neurology, Medical University of Vienna, Vienna, Austria
| | - Gabor G Kovacs
- Division of Neuropathology and Neurochemistry, Department of Neurology, Medical University of Vienna, Vienna, Austria
| | - Helmut Pankratz
- Institute of Forensic Medicine, Medical Faculty, Ludwig-Maximilian University Munich, Germany
| | - Joachim Weis
- Institute of Neuropathology, RWTH Aachen University Hospital, Aachen, Germany
| | - Istvan Katona
- Institute of Neuropathology, RWTH Aachen University Hospital, Aachen, Germany
| | - Angelika Scheuerle
- Department of Pathology, Section Neuropathology, University Hospital, Ulm, Germany
| | - Wolfgang J Streit
- Department of Neuroscience, College of Medicine, University of Florida, FL, USA
| | - Kelly Del Tredici
- Clinical Neuroanatomy, Neurology, School of Medicine, Ulm University, Ulm, Germany
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Post-Ischemic Neurodegeneration of the Hippocampus Resembling Alzheimer's Disease Proteinopathy. Int J Mol Sci 2021; 23:ijms23010306. [PMID: 35008731 PMCID: PMC8745293 DOI: 10.3390/ijms23010306] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2021] [Revised: 12/26/2021] [Accepted: 12/26/2021] [Indexed: 12/14/2022] Open
Abstract
In this review, we summarize, inter alia, the protein and gene changes associated with Alzheimer’s disease and their role in post-ischemic hippocampal neurodegeneration. In the hippocampus, studies have revealed dysregulation of the genes for the amyloid protein precursor metabolism and tau protein that is identical in nature to Alzheimer’s disease. Data indicate that amyloid and tau protein, derived from brain tissue and blood due to increased permeability of the blood–brain barrier after ischemia, play a key role in post-ischemic neurodegeneration of the hippocampus, with concomitant development of full-blown dementia. Thus, the knowledge of new neurodegenerative mechanisms that cause neurodegeneration of the hippocampus after ischemia, resembling Alzheimer’s disease proteinopathy, will provide the most important therapeutic development goals to date.
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Differential effects of the cell cycle inhibitor, olomoucine, on functional recovery and on responses of peri-infarct microglia and astrocytes following photothrombotic stroke in rats. J Neuroinflammation 2021; 18:168. [PMID: 34332596 PMCID: PMC8325288 DOI: 10.1186/s12974-021-02208-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 07/02/2021] [Indexed: 11/17/2022] Open
Abstract
Background Following stroke, changes in neuronal connectivity in tissue surrounding the infarct play an important role in both spontaneous recovery of neurological function and in treatment-induced improvements in function. Microglia and astrocytes influence this process through direct interactions with the neurons and as major determinants of the local tissue environment. Subpopulations of peri-infarct glia proliferate early after stroke providing a possible target to modify recovery. Treatment with cell cycle inhibitors can reduce infarct volume and improve functional recovery. However, it is not known whether these inhibitors can influence neurological function or alter the responses of peri-infarct glia without reducing infarction. The present study aimed to address these issues by testing the effects of the cell cycle inhibitor, olomoucine, on recovery and peri-infarct changes following photothrombotic stroke. Methods Stroke was induced by photothrombosis in the forelimb sensorimotor cortex in Sprague-Dawley rats. Olomoucine was administered at 1 h and 24 h after stroke induction. Forelimb function was monitored up to 29 days. The effects of olomoucine on glial cell responses in peri-infarct tissue were evaluated using immunohistochemistry and Western blotting. Results Olomoucine treatment did not significantly affect maximal infarct volume. Recovery of the affected forelimb on a placing test was impaired in olomoucine-treated rats, whereas recovery in a skilled reaching test was substantially improved. Olomoucine treatment produced small changes in aspects of Iba1 immunolabelling and in the number of CD68-positive cells in cerebral cortex but did not selectively modify responses in peri-infarct tissue. The content of the astrocytic protein, vimentin, was reduced by 30% in the region of the lesion in olomoucine-treated rats. Conclusions Olomoucine treatment modified functional recovery in the absence of significant changes in infarct volume. The effects on recovery were markedly test dependent, adding to evidence that skilled tasks requiring specific training and general measures of motor function can be differentially modified by some interventions. The altered recovery was not associated with specific changes in key responses of peri-infarct microglia, even though these cells were considered a likely target for early olomoucine treatment. Changes detected in peri-infarct reactive astrogliosis could contribute to the altered patterns of functional recovery. Supplementary Information The online version contains supplementary material available at 10.1186/s12974-021-02208-w.
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Xu S, Sun Q, Fan J, Jiang Y, Yang W, Cui Y, Yu Z, Jiang H, Li B. Role of Astrocytes in Post-traumatic Epilepsy. Front Neurol 2019; 10:1149. [PMID: 31798512 PMCID: PMC6863807 DOI: 10.3389/fneur.2019.01149] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Accepted: 10/14/2019] [Indexed: 12/25/2022] Open
Abstract
Traumatic brain injury, a common cause of acquired epilepsy, is typical to find necrotic cell death within the injury core. The dynamic changes in astrocytes surrounding the injury core contribute to epileptic seizures associated with intense neuronal firing. However, little is known about the molecular mechanisms that activate astrocytes during traumatic brain injury or the effect of functional changes of astrocytes on seizures. In this comprehensive review, we present our cumulated understanding of the complex neurological affection in astrocytes after traumatic brain injury. We approached the problem through describing the changes of cell morphology, neurotransmitters, biochemistry, and cytokines in astrocytes during post-traumatic epilepsy. In addition, we also discussed the relationship between dynamic changes in astrocytes and seizures and the current pharmacologic agents used for treatment. Hopefully, this review will provide a more detailed knowledge from which better therapeutic strategies can be developed to treat post-traumatic epilepsy.
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Affiliation(s)
- Songbai Xu
- Department of Neurosurgery, the First Hospital of Jilin University, Changchun, China
| | - Qihan Sun
- School of Pharmaceutical Sciences, Jilin University, Changchun, China
| | - Jie Fan
- Jilin Provincial Key Laboratory on Molecular and Chemical Genetic, The Second Hospital of Jilin University, Changchun, China
| | - Yuanyuan Jiang
- School of Pharmaceutical Sciences, Jilin University, Changchun, China
| | - Wei Yang
- Jilin Provincial Key Laboratory on Molecular and Chemical Genetic, The Second Hospital of Jilin University, Changchun, China
| | - Yifeng Cui
- Department of Pediatrics, Yanbian Maternal and Child Health Hospital, Yanji, China
| | - Zhenxiang Yu
- Department of Neurosurgery, the First Hospital of Jilin University, Changchun, China
| | - Huiyi Jiang
- Department of Neurosurgery, the First Hospital of Jilin University, Changchun, China
| | - Bingjin Li
- Jilin Provincial Key Laboratory on Molecular and Chemical Genetic, The Second Hospital of Jilin University, Changchun, China
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Yew WP, Djukic ND, Jayaseelan JSP, Walker FR, Roos KAA, Chataway TK, Muyderman H, Sims NR. Early treatment with minocycline following stroke in rats improves functional recovery and differentially modifies responses of peri-infarct microglia and astrocytes. J Neuroinflammation 2019; 16:6. [PMID: 30626393 PMCID: PMC6325745 DOI: 10.1186/s12974-018-1379-y] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Accepted: 11/26/2018] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Altered neuronal connectivity in peri-infarct tissue is an important contributor to both the spontaneous recovery of neurological function that commonly develops after stroke and improvements in recovery that have been induced by experimental treatments in animal models. Microglia and astrocytes are primary determinants of the environment in peri-infarct tissue and hence strongly influence the potential for neuronal plasticity. However, the specific roles of these cells and the timing of critical changes in their function are not well understood. Minocycline can protect against ischemic damage and promote recovery. These effects are usually attributed, at least partially, to the ability of this drug to suppress microglial activation. This study tested the ability of minocycline treatment early after stroke to modify reactive responses in microglia and astrocytes and improve recovery. METHODS Stroke was induced by photothrombosis in the forelimb sensorimotor cortex of Sprague-Dawley rats. Minocycline was administered for 2 days after stroke induction and the effects on forelimb function assessed up to 28 days. The responses of peri-infarct Iba1-positive cells and astrocytes were evaluated using immunohistochemistry and Western blots. RESULTS Initial characterization showed that the numbers of Iba1-positive microglia and macrophages decreased in peri-infarct tissue at 24 h then increased markedly over the next few days. Morphological changes characteristic of activation were readily apparent by 3 h and increased by 24 h. Minocycline treatment improved the rate of recovery of motor function as measured by a forelimb placing test but did not alter infarct volume. At 3 days, there were only minor effects on core features of peri-infarct microglial reactivity including the morphological changes and increased density of Iba1-positive cells. The treatment caused a decrease of 57% in the small subpopulation of cells that expressed CD68, a marker of phagocytosis. At 7 days, the expression of glial fibrillary acidic protein and vimentin was markedly increased by minocycline treatment, indicating enhanced reactive astrogliosis. CONCLUSIONS Early post-stroke treatment with minocycline improved recovery but had little effect on key features of microglial activation. Both the decrease in CD68-positive cells and the increased activation of astrogliosis could influence neuronal plasticity and contribute to the improved recovery.
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Affiliation(s)
- Wai Ping Yew
- Centre for Neuroscience, College of Medicine and Public Health, Flinders University, GPO Box 2100, Adelaide, SA, 5001, Australia
| | - Natalia D Djukic
- Centre for Neuroscience, College of Medicine and Public Health, Flinders University, GPO Box 2100, Adelaide, SA, 5001, Australia
| | - Jaya S P Jayaseelan
- Centre for Neuroscience, College of Medicine and Public Health, Flinders University, GPO Box 2100, Adelaide, SA, 5001, Australia
| | - Frederick R Walker
- Hunter Medical Research Institute; School of Biomedical Medical Sciences and Pharmacy, University of Newcastle Priority Research Centre in Stroke and Traumatic Brain Injury, Newcastle, NSW, Australia
| | - Karl A A Roos
- Hunter Medical Research Institute; School of Biomedical Medical Sciences and Pharmacy, University of Newcastle Priority Research Centre in Stroke and Traumatic Brain Injury, Newcastle, NSW, Australia
| | - Timothy K Chataway
- Centre for Neuroscience, College of Medicine and Public Health, Flinders University, GPO Box 2100, Adelaide, SA, 5001, Australia
| | - Hakan Muyderman
- Centre for Neuroscience, College of Medicine and Public Health, Flinders University, GPO Box 2100, Adelaide, SA, 5001, Australia
| | - Neil R Sims
- Centre for Neuroscience, College of Medicine and Public Health, Flinders University, GPO Box 2100, Adelaide, SA, 5001, Australia.
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Zhang H, Sun X, Xie Y, Tian F, Hu H, Tan W. Isosteviol Sodium Inhibits Astrogliosis after Cerebral Ischemia/Reperfusion Injury in Rats. Biol Pharm Bull 2018; 41:575-584. [PMID: 29607930 DOI: 10.1248/bpb.b17-00921] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Previous reports have indicated that isosteviol sodium (STVNa) has neuroprotective effects against acute focal cerebral ischemia in rats; however, the exact underlying mechanisms and ideal treatment paradigm are not known. To find a reasonable method for STVNa administration and to determine its possible therapeutic mechanisms, we characterized the protective effects of single-dose and multiple-dose STVNa in cerebral ischemic/reperfusion (I/R) injury in rats. Single and multiple treatments with 10 mg/kg STVNa were administered intraperitoneally after injury to investigate its neuroprotective effects. Neurobehavioral deficits and infarct volume were assessed 7 d after ischemia. Both STVNa treatments reduced infarct volumes, improved neurological behaviors, preserved cellular morphology, enhanced neuronal survival, and suppressed cell apoptosis. Multiple treatments performed better than single treatment. Reactive astrogliosis was apparent at 7 d after injury and was significantly inhibited by multiple STVNa treatments but not single treatment. These results indicate that STVNa exerts neuroprotection by different mechanisms in the acute and delayed phases of I/R. Specifically, STVNa neuroprotection in the delayed phase of injury was found to be accompanied with the inhibition of astrogliosis.
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Affiliation(s)
- Hao Zhang
- School of Bioscience & Bioengineering, South China University of Technology
| | - Xiaoou Sun
- Institute of Biomedical & Pharmaceutical Sciences, Guangdong University of Technology
| | - Yanxiang Xie
- School of Bioscience & Bioengineering, South China University of Technology
| | - Fang Tian
- School of Bioscience & Bioengineering, South China University of Technology
| | - Hui Hu
- Institute of Biomedical & Pharmaceutical Sciences, Guangdong University of Technology
| | - Wen Tan
- Institute of Biomedical & Pharmaceutical Sciences, Guangdong University of Technology
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Schiweck J, Eickholt BJ, Murk K. Important Shapeshifter: Mechanisms Allowing Astrocytes to Respond to the Changing Nervous System During Development, Injury and Disease. Front Cell Neurosci 2018; 12:261. [PMID: 30186118 PMCID: PMC6111612 DOI: 10.3389/fncel.2018.00261] [Citation(s) in RCA: 136] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Accepted: 07/31/2018] [Indexed: 12/30/2022] Open
Abstract
Astrocytes are the most prevalent glial cells in the brain. Historically considered as “merely supporting” neurons, recent research has shown that astrocytes actively participate in a large variety of central nervous system (CNS) functions including synaptogenesis, neuronal transmission and synaptic plasticity. During disease and injury, astrocytes efficiently protect neurons by various means, notably by sealing them off from neurotoxic factors and repairing the blood-brain barrier. Their ramified morphology allows them to perform diverse tasks by interacting with synapses, blood vessels and other glial cells. In this review article, we provide an overview of how astrocytes acquire their complex morphology during development. We then move from the developing to the mature brain, and review current research on perisynaptic astrocytic processes, with a particular focus on how astrocytes engage synapses and modulate their formation and activity. Comprehensive changes have been reported in astrocyte cell shape in many CNS pathologies. Factors influencing these morphological changes are summarized in the context of brain pathologies, such as traumatic injury and degenerative conditions. We provide insight into the molecular, cellular and cytoskeletal machinery behind these shape changes which drive the dynamic remodeling in astrocyte morphology during injury and the development of pathologies.
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Affiliation(s)
- Juliane Schiweck
- Institute for Biochemistry, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Britta J Eickholt
- Institute for Biochemistry, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Kai Murk
- Institute for Biochemistry, Charité Universitätsmedizin Berlin, Berlin, Germany
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Park JH, Cho JH, Ahn JH, Choi SY, Lee TK, Lee JC, Shin BN, Hong S, Jeon YH, Kim YM, Hwang IK, Lee YJ, Won MH, Kang IJ. Neuronal loss and gliosis in the rat striatum subjected to 15 and 30 minutes of middle cerebral artery occlusion. Metab Brain Dis 2018; 33:775-784. [PMID: 29354885 DOI: 10.1007/s11011-018-0192-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2017] [Accepted: 01/17/2018] [Indexed: 11/27/2022]
Abstract
Selective neuronal death or loss in certain brain regions has been well characterized in animal models of transient global cerebral ischemia. However, selective neuronal death in transient focal cerebral ischemia needs more investigation. Therefore, in this study, we studied selective neuronal death in the striatum (caudate putamen) of rats subjected to 15 or 30 min middle cerebral artery occlusion (MCAO). Neuronal death occurred in the dorsolateral field, not in the medial field in 30 min, not 15 min, MCAO-operated rats 5 days after MCAO using neuronal nuclear antigen immunohistochemistry and Fluoro-Jade B histofluorescence staining. In this group, immunoreactivity of glial fibrillary acidic protein in astrocytes was hardly shown in the dorsolateral field, although the immunoreactivity increased in the medial field. In addition, immunoreactivity of ionized calcium binding adapter molecule 1 in microglia was dramatically increased in the dorsolateral, not in the medial, field only in 30 min MCAO-operated rats. Briefly, these results show that at least 30 min of MCAO can evoke selective neuronal death, astrocytic dysfunction and microglial activation in the dorsolateral field of the rat striatum and suggest that a rat model of 30 min MCAO can be used to investigate mechanisms of neuronal death and gliosis following brief transient focal cerebral ischemic events for acute transient ischemic attack.
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Affiliation(s)
- Joon Ha Park
- Department of Biomedical Science and Research Institute for Bioscience and Biotechnology, Hallym University, 1 Hallymdaehak-gil, Chuncheon, Gangwon, 24252, Republic of Korea
| | - Jeong Hwi Cho
- Department of Neurobiology, School of Medicine, Kangwon National University, 1 Kangwondaehak-gil, Chuncheon, Gangwon, 24341, Republic of Korea
| | - Ji Hyeon Ahn
- Department of Biomedical Science and Research Institute for Bioscience and Biotechnology, Hallym University, 1 Hallymdaehak-gil, Chuncheon, Gangwon, 24252, Republic of Korea
| | - Soo Young Choi
- Department of Biomedical Science and Research Institute for Bioscience and Biotechnology, Hallym University, 1 Hallymdaehak-gil, Chuncheon, Gangwon, 24252, Republic of Korea
| | - Tae-Kyeong Lee
- Department of Neurobiology, School of Medicine, Kangwon National University, 1 Kangwondaehak-gil, Chuncheon, Gangwon, 24341, Republic of Korea
| | - Jae-Chul Lee
- Department of Neurobiology, School of Medicine, Kangwon National University, 1 Kangwondaehak-gil, Chuncheon, Gangwon, 24341, Republic of Korea
| | - Bich Na Shin
- Department of Neurobiology, School of Medicine, Kangwon National University, 1 Kangwondaehak-gil, Chuncheon, Gangwon, 24341, Republic of Korea
| | - Seongkweon Hong
- Department of Surgery, School of Medicine, Kangwon National University, 1 Kangwondaehak-gil, Chuncheon, Gangwon, 24341, Republic of Korea
| | - Yong Hwan Jeon
- Department of Radiology, School of Medicine, Kangwon National University, 1 Kangwondaehak-gil, Chuncheon, Gangwon, 24341, Republic of Korea
| | - Young-Myeong Kim
- Department of Molecular and Cellular Biochemistry, School of Medicine, Kangwon National University, 1 Kangwondaehak-gil, Chuncheon, Gangwon, 24341, Republic of Korea
| | - In Koo Hwang
- Department of Anatomy and Cell Biology, College of Veterinary Medicine, and Research Institute for Veterinary Science, Seoul National University, 1 Gwanak-ro, Seoul, 08826, Republic of Korea
| | - Young Joo Lee
- Department of Emergency Medicine, Seoul Hospital, College of Medicine, Sooncheonhyang University, 59 Daesagwan-ro, Seoul, 04401, Republic of Korea
| | - Moo-Ho Won
- Department of Neurobiology, School of Medicine, Kangwon National University, 1 Kangwondaehak-gil, Chuncheon, Gangwon, 24341, Republic of Korea.
| | - Il Jun Kang
- Department of Food Science and Nutrition, Hallym University, 1 Hallymdaehak-gil, Chuncheon, Gangwon, 24252, Republic of Korea.
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11
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Koyama K, Kangawa A, Fukumoto N, Watanabe KI, Horiuchi N, Ozawa T, Inokuma H, Kobayashi Y. Histopathological study of encephalomalacia in neonatal calves and application of neuronal and axonal degeneration marker. J Vet Med Sci 2018; 80:1116-1124. [PMID: 29731475 PMCID: PMC6068296 DOI: 10.1292/jvms.18-0143] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Five calves that had shown neurological symptoms within 9 days after birth were histopathologically diagnosed as encephalomalacia. Two calves showed bilateral laminar cerebrocortical necrosis and neuronal necrosis in the corpus striatum and hippocampus. Since the distributional pattern of the lesions was consistent with that of global ischemia in other species, the lesions were probably hypoxic/ischemic encephalopathy consistent with the history of dystocia and perinatal asphyxia. One calf also showed bilateral laminar cerebrocortical necrosis. However, the lesions were chronic ones, because the calf had survived for long time and necropsied at postnatal day 118. Additionally, the lesions did not involve the corpus striatum and hippocampus. The other two calves showed multifocal necrosis with vascular lesions characterized by fibrin thrombi, perivascular edema and perivascular hyaline droplets in the cerebral cortex, corpus striatum, thalamus, brain stem and cerebellum. Considering the age of onsets and histopathological appearance, it was possible that latter three calves were also hypoxic/ischemic encephalopathy, however, exact cause of them was not revealed. In all calves, degenerated/necrotic neurons showed positive reactions for Fluoro-Jade C and degenerated axons showed immunoreactivity for Alzheimer precursor protein A4. Therefore, these markers were applicable to examination of brain injury in neonatal calves.
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Affiliation(s)
- Kenji Koyama
- Laboratory of Veterinary Pathology, Department of Basic Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido 080-8555, Japan.,The United Graduate School of Veterinary Sciences, Gifu University, Gifu, Gifu 501-1193, Japan
| | - Akihisa Kangawa
- Laboratory of Veterinary Pathology, Department of Basic Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido 080-8555, Japan
| | - Natsuko Fukumoto
- National Livestock Breeding Center, Tokachi Station, Otofuke, Hokkaido 080-0572, Japan
| | - Ken-Ichi Watanabe
- Laboratory of Veterinary Pathology, Department of Basic Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido 080-8555, Japan
| | - Noriyuki Horiuchi
- Laboratory of Veterinary Pathology, Department of Basic Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido 080-8555, Japan
| | - Tomomi Ozawa
- National Institute of Animal Health, National Agriculture and Food Research Organization, Tsukuba, Ibaraki 305-0856, Japan
| | - Hisashi Inokuma
- Laboratory of Veterinary Internal Medicine, Department of Clinical Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido 080-8555, Japan
| | - Yoshiyasu Kobayashi
- Laboratory of Veterinary Pathology, Department of Basic Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido 080-8555, Japan
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12
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JM-20 Treatment After MCAO Reduced Astrocyte Reactivity and Neuronal Death on Peri-infarct Regions of the Rat Brain. Mol Neurobiol 2018; 56:502-512. [DOI: 10.1007/s12035-018-1087-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Accepted: 04/12/2018] [Indexed: 02/06/2023]
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13
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Hypoxia-Induced Neuroinflammation and Learning-Memory Impairments in Adult Zebrafish Are Suppressed by Glucosamine. Mol Neurobiol 2018; 55:8738-8753. [PMID: 29589284 DOI: 10.1007/s12035-018-1017-9] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2017] [Accepted: 03/16/2018] [Indexed: 10/17/2022]
Abstract
This study investigated changes in neuroinflammation and cognitive function in adult zebrafish exposed to acute hypoxia and protective effects of glucosamine (GlcN) against hypoxia-induced brain damage. The survival rate of zebrafish following exposure to hypoxia was improved by GlcN pretreatment. Moreover, hypoxia-induced upregulation of neuroglobin, NOS2α, glial fibrillary acidic protein, and S100β in zebrafish was suppressed by GlcN. Hypoxia stimulated cell proliferation in the telencephalic ventral domain and in cerebellum subregions. GlcN decreased the number of bromodeoxyuridine (BrdU)-positive cells in the telencephalon region, but not in cerebellum regions. Transient motor neuron defects, assessed by measuring the locomotor and exploratory activity of zebrafish exposed to hypoxia recovered quickly. GlcN did not affect hypoxia-induced motor activity changes. In passive avoidance tests, hypoxia impaired learning and memory ability, deficits that were rescued by GlcN. A learning stimulus increased the nuclear translocation of phosphorylated cAMP response element binding protein (p-CREB), an effect that was greatly inhibited by hypoxia. GlcN restored nuclear p-CREB after a learning trial in hypoxia-exposed zebrafish. The neurotransmitters, γ-aminobutyric acid and glutamate, were increased after hypoxia in the zebrafish brain, and GlcN further increased their levels. In contrast, acetylcholine levels were reduced by hypoxia and restored by GlcN. Acetylcholinesterase inhibitor physostigmine partially reversed the impaired learning and memory of hypoxic zebrafish. This study represents the first examination of the molecular mechanisms underlying hypoxia-induced memory and learning defects in a zebrafish model. Our results further suggest that GlcN-associated hexosamine metabolic pathway could be an important therapeutic target for hypoxic brain damage.
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14
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Kelly KM, Jukkola PI, Yin G, Miller ER, Kharlamov EA, Shiau DS, Strong R, Aronowski J. Poststroke epilepsy following transient unilateral middle cerebral and common carotid artery occlusion in young adult and aged F344 rats. Epilepsy Res 2018; 141:38-47. [PMID: 29455049 PMCID: PMC5879023 DOI: 10.1016/j.eplepsyres.2018.02.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Revised: 12/29/2017] [Accepted: 02/07/2018] [Indexed: 01/14/2023]
Abstract
The mechanisms of injured brain that establish poststroke seizures and epilepsy are not well understood, largely because animal modeling has had limited development. The main objective of this study was to determine whether an arterial occlusion model of cortical stroke in young adult and aged rats was capable of generating either focal or generalized epileptic seizures within 2 months of lesioning. Four- and 20-month-old male Fischer 344 (F344) sham-operated controls and those lesioned by transient (3 h) unilateral middle cerebral artery (MCA) and common carotid artery (CCA) occlusion (MCA/CCAo) were studied by video-EEG recordings up to 2 months post-procedure. The main findings were: 1) seizures (grade 3 and above) were recorded within 2 months in both young (4-month; 0.23/h) and aged (20-month; 1.93/h) MCA/CCAo rat groups; both MCA/CCAo rat groups had more seizures recorded than the respective control groups, i.e., no seizures in young controls and 0.52/h in old controls; 2) both age and infarction independently had effects on seizure frequency; however, there was no demonstrated interaction between the two factors; and 3) there was no difference in infarct volumes comparing 4- to 20-month-old MCA/CCAo animals. In addition, all lesioned and sham-operated animals demonstrated intermittent solitary myoclonic convulsions arising out of sleep. Morbidity and mortality of animals limited the extent to which the animals could be evaluated, especially 20-month-old animals. These results suggest that transient unilateral MCA/CCAo can result in poststroke epileptic seizures in both young adult and aged F344 rats within a relatively brief period of time following lesioning.
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Affiliation(s)
- Kevin M Kelly
- Department of Neurology and Allegheny Health Network Research Institute, Allegheny General Hospital, Pittsburgh, PA, USA; Departments of Neurology, Drexel University College of Medicine, Philadelphia, PA, USA; Departments of Neurobiology and Anatomy, Drexel University College of Medicine, Philadelphia, PA, USA.
| | - Peter I Jukkola
- Department of Neurology and Allegheny Health Network Research Institute, Allegheny General Hospital, Pittsburgh, PA, USA
| | - Guo Yin
- Department of Neurology and Allegheny Health Network Research Institute, Allegheny General Hospital, Pittsburgh, PA, USA
| | - Eric R Miller
- Department of Neurology and Allegheny Health Network Research Institute, Allegheny General Hospital, Pittsburgh, PA, USA
| | - Elena A Kharlamov
- Department of Neurology and Allegheny Health Network Research Institute, Allegheny General Hospital, Pittsburgh, PA, USA; Departments of Neurology, Drexel University College of Medicine, Philadelphia, PA, USA
| | | | - Roger Strong
- Stroke Program, Department of Neurology, University of Texas at Houston McGovern Medical School, Houston, TX, USA
| | - Jaroslaw Aronowski
- Stroke Program, Department of Neurology, University of Texas at Houston McGovern Medical School, Houston, TX, USA
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15
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Alaverdashvili M, Caine S, Li X, Hackett MJ, Bradley MP, Nichol H, Paterson PG. Protein-Energy Malnutrition Exacerbates Stroke-Induced Forelimb Abnormalities and Dampens Neuroinflammation. Transl Stroke Res 2018; 9:622-630. [PMID: 29397529 DOI: 10.1007/s12975-018-0613-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 01/20/2018] [Accepted: 01/23/2018] [Indexed: 11/30/2022]
Abstract
Protein-energy malnutrition (PEM) pre-existing at stroke onset is believed to worsen functional outcome, yet the underlying mechanisms are not fully understood. Since brain inflammation is an important modulator of neurological recovery after stroke, we explored the impact of PEM on neuroinflammation in the acute period in relation to stroke-initiated sensori-motor abnormalities. Adult rats were fed a low-protein (LP) or normal protein (NP) diet for 28 days before inducing photothrombotic stroke (St) in the forelimb region of the motor cortex or sham surgery; the diets continued for 3 days after the stroke. Protein-energy status was assessed by a combination of body weight, food intake, serum acute phase proteins and corticosterone, and liver lipid content. Deficits in motor function were evaluated in the horizontal ladder walking and cylinder tasks at 3 days after stroke. The glial response and brain elemental signature were investigated by immunohistochemistry and micro-X-ray fluorescence imaging, respectively. The LP-fed rats reduced food intake, resulting in PEM. Pre-existing PEM augmented stroke-induced abnormalities in forelimb placement accuracy on the ladder; LP-St rats made more errors (29 ± 8%) than the NP-St rats (15 ± 3%; P < 0.05). This was accompanied by attenuated astrogliosis in the peri-infarct area by 18% and reduced microglia activation by up to 41 and 21% in the peri-infarct area and the infarct rim, respectively (P < 0.05). The LP diet altered the cortical Zn, Ca, and Cl signatures (P < 0.05). Our data suggest that proactive treatment of pre-existing PEM could be essential for optimal post-stroke recovery.
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Affiliation(s)
- Mariam Alaverdashvili
- College of Pharmacy and Nutrition, University of Saskatchewan, D Wing Health Sciences, 107 Wiggins Road, Saskatoon, SK, S7N 5E5, Canada.
| | - Sally Caine
- College of Pharmacy and Nutrition, University of Saskatchewan, D Wing Health Sciences, 107 Wiggins Road, Saskatoon, SK, S7N 5E5, Canada
| | - Xue Li
- College of Pharmacy and Nutrition, University of Saskatchewan, D Wing Health Sciences, 107 Wiggins Road, Saskatoon, SK, S7N 5E5, Canada
| | - Mark J Hackett
- Department of Geological Sciences, University of Saskatchewan, Saskatoon, Canada
| | - Michael P Bradley
- Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, Canada
| | - Helen Nichol
- Department of Anatomy and Cell Biology, University of Saskatchewan, Saskatoon, Canada
| | - Phyllis G Paterson
- College of Pharmacy and Nutrition, University of Saskatchewan, D Wing Health Sciences, 107 Wiggins Road, Saskatoon, SK, S7N 5E5, Canada.
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16
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Astroglial Responses to Amyloid-Beta Progression in a Mouse Model of Alzheimer’s Disease. Mol Imaging Biol 2018; 20:605-614. [DOI: 10.1007/s11307-017-1153-z] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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17
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Zhang H, Sun X, Xie Y, Zan J, Tan W. Isosteviol Sodium Protects Against Permanent Cerebral Ischemia Injury in Mice via Inhibition of NF-κB–Mediated Inflammatory and Apoptotic Responses. J Stroke Cerebrovasc Dis 2017; 26:2603-2614. [DOI: 10.1016/j.jstrokecerebrovasdis.2017.06.023] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2017] [Revised: 06/01/2017] [Accepted: 06/09/2017] [Indexed: 01/01/2023] Open
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18
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Transformation of Astrocytes to a Neuroprotective Phenotype by Microglia via P2Y 1 Receptor Downregulation. Cell Rep 2017; 19:1151-1164. [DOI: 10.1016/j.celrep.2017.04.047] [Citation(s) in RCA: 191] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2016] [Revised: 03/07/2017] [Accepted: 04/14/2017] [Indexed: 11/22/2022] Open
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19
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Pak HJ, Riew TR, Shin YJ, Choi JH, Jin X, Lee MY. Enhanced expression of the calcium-sensing receptor in reactive astrocytes following ischemic injury in vivo and in vitro. J Neurol Sci 2016; 366:102-109. [PMID: 27288786 DOI: 10.1016/j.jns.2016.05.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2016] [Revised: 04/11/2016] [Accepted: 05/06/2016] [Indexed: 11/19/2022]
Abstract
We recently demonstrated that the G protein-coupled calcium-sensing receptor (CaSR) is associated with the pathogenesis of ischemic stroke and may be involved in vascular remodeling and astrogliosis. To further substantiate the involvement of CaSR in the astroglial reaction common to ischemic insults, we investigated the temporal and cell type-specific expression patterns of CaSR in the hippocampus after transient forebrain ischemia. CaSR was constitutively expressed in neurons of the pyramidal and granule cell layers, whereas increased CaSR immunoreactivity was observed in reactive astrocytes, but not in activated microglia or macrophages, in the CA1 region of the post-ischemic hippocampus. Astroglial induction of CaSR expression was evident on days 3-7 after reperfusion and appeared to increase progressively through day 28, at which time CaSR expression was prominent in astrocytes with a highly reactive hypertrophic phenotype and elevated levels of glial fibrillary acidic protein. This expression pattern was supported by results of immunoblot analyses. Furthermore, CaSR expression was upregulated in rat primary cortical astrocytes exposed to oxygen-glucose deprivation, which undergo reactive gliosis-like changes. Thus, our results demonstrate that selective and long-lasting astroglial induction of CaSR expression is a common characteristic of ischemic injury and suggest its involvement in the ischemia-induced astroglial reaction.
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Affiliation(s)
- Ha-Jin Pak
- Department of Anatomy, Catholic Neuroscience Institute, College of Medicine, The Catholic University of Korea, 137-701, Seoul, Korea
| | - Tae-Ryong Riew
- Department of Anatomy, Catholic Neuroscience Institute, College of Medicine, The Catholic University of Korea, 137-701, Seoul, Korea
| | - Yoo-Jin Shin
- Department of Anatomy, Catholic Neuroscience Institute, College of Medicine, The Catholic University of Korea, 137-701, Seoul, Korea
| | - Jeong-Heon Choi
- Department of Anatomy, Catholic Neuroscience Institute, College of Medicine, The Catholic University of Korea, 137-701, Seoul, Korea
| | - Xuyan Jin
- Department of Anatomy, Catholic Neuroscience Institute, College of Medicine, The Catholic University of Korea, 137-701, Seoul, Korea
| | - Mun-Yong Lee
- Department of Anatomy, Catholic Neuroscience Institute, College of Medicine, The Catholic University of Korea, 137-701, Seoul, Korea.
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20
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Park JH, Pak HJ, Riew TR, Shin YJ, Lee MY. Increased expression of Slit2 and its receptors Robo1 and Robo4 in reactive astrocytes of the rat hippocampus after transient forebrain ischemia. Brain Res 2016; 1634:45-56. [PMID: 26764532 DOI: 10.1016/j.brainres.2015.12.056] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Revised: 12/26/2015] [Accepted: 12/28/2015] [Indexed: 12/16/2022]
Abstract
Slit2 is a secreted glycoprotein that was originally identified as a chemorepulsive factor in the developing brain; however, it was recently reported that Slit2 is associated with adult neuronal function including a variety of pathophysiological processes. To elucidate whether Slit2 is implicated in the pathophysiology of ischemic injury, we investigated the temporal changes and cellular localization of Slit2 and its predominant receptors, Robo1 and Robo4, for 28 days after transient forebrain ischemia. Slit2 and its receptors had similar overall expression patterns in the control and ischemic hippocampi. The ligand and receptors were constitutively expressed in hippocampal neurons in control animals; however, in animals with ischemic injury, their upregulation was detected in reactive astrocytes, but not in neurons or activated microglia, in the CA1 region. Astroglial induction of Slit2 and its receptors occurred by day 3 after reperfusion, and appeared to increase progressively until the final time point on day 28. Their temporal expression patterns overlapped with the time period in which reactive astrocytes undergo dynamic structural changes and appear hypertrophic in the ischemic hippocampus. The immunohistochemical data were consistent with the results of the immunoblot analyses, indicating that the expression of Slit2 and Robo increased progressively over the relatively long period of 28 days examined here. Collectively, these results suggest that Slit2/Robo signaling may be involved in regulating the astroglial reaction via autocrine or paracrine mechanisms in post-ischemic processes. Moreover, this may contribute to the dynamic morphological changes that occur in astrocytes in response to ischemic injury.
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Affiliation(s)
- Joo-Hee Park
- Department of Anatomy, Catholic Neuroscience Institute, College of Medicine, The Catholic University of Korea, 137-701 Seoul, Republic of Korea
| | - Ha-Jin Pak
- Department of Anatomy, Catholic Neuroscience Institute, College of Medicine, The Catholic University of Korea, 137-701 Seoul, Republic of Korea
| | - Tae-Ryong Riew
- Department of Anatomy, Catholic Neuroscience Institute, College of Medicine, The Catholic University of Korea, 137-701 Seoul, Republic of Korea
| | - Yoo-Jin Shin
- Department of Anatomy, Catholic Neuroscience Institute, College of Medicine, The Catholic University of Korea, 137-701 Seoul, Republic of Korea
| | - Mun-Yong Lee
- Department of Anatomy, Catholic Neuroscience Institute, College of Medicine, The Catholic University of Korea, 137-701 Seoul, Republic of Korea.
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21
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Takarada T, Kou M, Hida M, Fukumori R, Nakamura S, Kutsukake T, Kuramoto N, Hinoi E, Yoneda Y. Protective upregulation of activating transcription factor-3 against glutamate neurotoxicity in neuronal cells under ischemia. J Neurosci Res 2016; 94:378-88. [PMID: 26900013 DOI: 10.1002/jnr.23723] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Revised: 01/18/2016] [Accepted: 01/28/2016] [Indexed: 01/05/2023]
Abstract
This study evaluates the pathological role of the stress sensor activating transcription factor-3 (ATF3) in ischemic neurotoxicity. Upregulation of the transcript and protein for ATF3 was seen 2-10 hr after reperfusion in the ipsilateral cerebral hemisphere of mice with transient middle cerebral artery occlusion for 2 hr. Immunohistochemical analysis confirmed the expression of ATF3 by cells immunoreactive for a neuronal marker in neocortex, hippocampus, and striatum within 2 hr after reperfusion. In murine neocortical neurons previously cultured under ischemic conditions for 2 hr, transient upregulation of both Atf3 and ATF3 expression was similarly found during subsequent culture for 2-24 hr under normoxia. Lentiviral overexpression of ATF3 ameliorated the neurotoxicity of glutamate (Glu) in cultured murine neurons along with a slight but statistically significant inhibition of both Fluo-3 and rhodamine-2 fluorescence increases by N-methyl-D-aspartate. Similarly, transient upregulation was seen in Atf3 and ATF3 expression during the culture for 48 hr in neuronal Neuro2A cells previously cultured under ischemic conditions for 2 hr. Luciferase reporter analysis with ATF3 promoter together with immunoblotting revealed the possible involvement of several transcription factors responsive to extracellular and intracellular stressors in the transactivation of the Atf3 gene in Neuro2A cells. ATF3 could be upregulated to play a role in mechanisms underlying mitigation of the neurotoxicity mediated by the endogenous neurotoxin Glu at an early stage after ischemic signal inputs.
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Affiliation(s)
- Takeshi Takarada
- Laboratory of Molecular Pharmacology, Division of Pharmaceutical Sciences, Kanazawa University Graduate School of Medical, Pharmaceutical, and Health Sciences, Kanazawa, Ishikawa, Japan
| | - Miki Kou
- Laboratory of Molecular Pharmacology, Division of Pharmaceutical Sciences, Kanazawa University Graduate School of Medical, Pharmaceutical, and Health Sciences, Kanazawa, Ishikawa, Japan
| | - Miho Hida
- Laboratory of Molecular Pharmacology, Division of Pharmaceutical Sciences, Kanazawa University Graduate School of Medical, Pharmaceutical, and Health Sciences, Kanazawa, Ishikawa, Japan
| | - Ryo Fukumori
- Laboratory of Molecular Pharmacology, Division of Pharmaceutical Sciences, Kanazawa University Graduate School of Medical, Pharmaceutical, and Health Sciences, Kanazawa, Ishikawa, Japan
| | - Saki Nakamura
- Laboratory of Molecular Pharmacology, Division of Pharmaceutical Sciences, Kanazawa University Graduate School of Medical, Pharmaceutical, and Health Sciences, Kanazawa, Ishikawa, Japan
| | - Takaya Kutsukake
- Laboratory of Molecular Pharmacology, Division of Pharmaceutical Sciences, Kanazawa University Graduate School of Medical, Pharmaceutical, and Health Sciences, Kanazawa, Ishikawa, Japan
| | - Nobuyuki Kuramoto
- Department of Toxicology, Setsunan University, Hirakata, Osaka, Japan
| | - Eiichi Hinoi
- Laboratory of Molecular Pharmacology, Division of Pharmaceutical Sciences, Kanazawa University Graduate School of Medical, Pharmaceutical, and Health Sciences, Kanazawa, Ishikawa, Japan
| | - Yukio Yoneda
- Laboratory of Molecular Pharmacology, Division of Pharmaceutical Sciences, Kanazawa University Graduate School of Medical, Pharmaceutical, and Health Sciences, Kanazawa, Ishikawa, Japan
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22
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Schmidt-Kastner R. Genomic approach to selective vulnerability of the hippocampus in brain ischemia–hypoxia. Neuroscience 2015; 309:259-79. [DOI: 10.1016/j.neuroscience.2015.08.034] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2015] [Revised: 08/12/2015] [Accepted: 08/17/2015] [Indexed: 01/06/2023]
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23
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Broux B, Gowing E, Prat A. Glial regulation of the blood-brain barrier in health and disease. Semin Immunopathol 2015; 37:577-90. [PMID: 26245144 DOI: 10.1007/s00281-015-0516-2] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Accepted: 07/15/2015] [Indexed: 12/14/2022]
Abstract
The brain is the organ with the highest metabolic demand in the body. Therefore, it needs specialized vasculature to provide it with the necessary oxygen and nutrients, while protecting it against pathogens and toxins. The blood-brain barrier (BBB) is very tightly regulated by specialized endothelial cells, two basement membranes, and astrocytic endfeet. The proximity of astrocytes to the vessel makes them perfect candidates to influence the function of the BBB. Moreover, other glial cells are also known to contribute to either BBB quiescence or breakdown. In this review, we summarize the knowledge on glial regulation of the BBB during development, in homeostatic conditions in the adult, and during neuroinflammatory responses.
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Affiliation(s)
- Bieke Broux
- Neuroimmunology Unit, Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), 900 Rue Saint Denis Street, Room R9.912, Montréal, Québec, Canada, H2X 0A9
- Department of Neuroscience, Faculté de Médecine, Université de Montréal, Montréal, Canada
- Hasselt University, Biomedical Research Institute and transnationale Universiteit Limburg, School of Life Sciences, Agoralaan, Building C, 3590, Diepenbeek, Belgium
| | - Elizabeth Gowing
- Neuroimmunology Unit, Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), 900 Rue Saint Denis Street, Room R9.912, Montréal, Québec, Canada, H2X 0A9
- Department of Neuroscience, Faculté de Médecine, Université de Montréal, Montréal, Canada
| | - Alexandre Prat
- Neuroimmunology Unit, Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), 900 Rue Saint Denis Street, Room R9.912, Montréal, Québec, Canada, H2X 0A9.
- Department of Neuroscience, Faculté de Médecine, Université de Montréal, Montréal, Canada.
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24
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Yoo DY, Kim W, Nam SM, Yoo M, Lee S, Yoon YS, Won MH, Hwang IK, Choi JH. Neuroprotective effects of Z-ajoene, an organosulfur compound derived from oil-macerated garlic, in the gerbil hippocampal CA1 region after transient forebrain ischemia. Food Chem Toxicol 2014; 72:1-7. [DOI: 10.1016/j.fct.2014.06.023] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Revised: 06/04/2014] [Accepted: 06/25/2014] [Indexed: 02/04/2023]
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25
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Akdemir G, Ratelade J, Asavapanumas N, Verkman AS. Neuroprotective effect of aquaporin-4 deficiency in a mouse model of severe global cerebral ischemia produced by transient 4-vessel occlusion. Neurosci Lett 2014; 574:70-5. [PMID: 24717641 DOI: 10.1016/j.neulet.2014.03.073] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2014] [Revised: 03/27/2014] [Accepted: 03/28/2014] [Indexed: 10/25/2022]
Abstract
Astrocyte water channel aquaporin-4 (AQP4) facilitates water movement across the blood-brain barrier and into injured astrocytes. We previously showed reduced cytotoxic brain edema with improved neurological outcome in AQP4 knockout mice in water intoxication, infection and cerebral ischemia. Here, we established a 4-vessel transient occlusion model to test the hypothesis that AQP4 deficiency in mice could improve neurological outcome following severe global cerebral ischemia as occurs in cardiac arrest/resuscitation. Mice were subjected to 10-min transient bilateral carotid artery occlusion at 24h after bilateral vertebral artery cauterization. Cerebral blood flow was reduced during occlusion by >94% in both AQP4(+/+) and AQP4(-/-) mice. The primary outcome, neurological score, was remarkably better at 3 and 5 days after occlusion in AQP4(-/-) than in AQP4(+/+) mice, and survival was significantly improved as well. Brain water content was increased by 2.8±0.4% in occluded AQP4(+/+) mice, significantly greater than that of 0.3±0.6% in AQP4(-/-) mice. Histological examination and immunofluorescence of hippocampal sections at 5 days showed significantly greater neuronal loss in the CA1 region of hippocampus in AQP4(+/+) than AQP4(-/-) mice. The neuroprotection in mice conferred by AQP4 deletion following severe global cerebral ischemia provides proof-of-concept for therapeutic AQP4 inhibition to improve neurological outcome in cardiac arrest.
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Affiliation(s)
- Gökhan Akdemir
- Department of Medicine, University of California, San Francisco, CA 94143, USA; Department of Physiology, University of California, San Francisco, CA 94143, USA; Selçuk University, Medical Faculty, Department of Neurosurgery, Alaaddin Keykubat Campusö Selçuklu, Konya 42075, Turkey
| | - Julien Ratelade
- Department of Medicine, University of California, San Francisco, CA 94143, USA; Department of Physiology, University of California, San Francisco, CA 94143, USA
| | - Nithi Asavapanumas
- Department of Medicine, University of California, San Francisco, CA 94143, USA; Department of Physiology, University of California, San Francisco, CA 94143, USA
| | - A S Verkman
- Department of Medicine, University of California, San Francisco, CA 94143, USA; Department of Physiology, University of California, San Francisco, CA 94143, USA.
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Nam HGW, Kim W, Yoo DY, Choi JH, Won MH, Hwang IK, Jeong JH, Hwang HS, Moon SM. Chronological changes and effects of AMP-activated kinase in the hippocampal CA1 region after transient forebrain ischemia in gerbils. Neurol Res 2013; 35:395-405. [DOI: 10.1179/1743132813y.0000000158] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Han Ga Wi Nam
- Department of NeurosurgeryHangang Sacred Heart Hospital, College of Medicine, Hallym University, Seoul, South Korea,
| | - Woosuk Kim
- Department of Anatomy and Cell BiologyCollege of Veterinary Medicine, and Research Institute for Veterinary Science, Seoul National University, Seoul, South Korea,
| | - Dae Young Yoo
- Department of Anatomy and Cell BiologyCollege of Veterinary Medicine, and Research Institute for Veterinary Science, Seoul National University, Seoul, South Korea,
| | - Jung Hoon Choi
- Department of AnatomyCollege of Veterinary Medicine, Kangwon National University, Chuncheon, South Korea,
| | - Moo-Ho Won
- Department of NeurobiologySchool of Medicine, Kangwon National University, Chuncheon, South Korea
| | - In Koo Hwang
- Department of Anatomy and Cell BiologyCollege of Veterinary Medicine, and Research Institute for Veterinary Science, Seoul National University, Seoul, South Korea,
| | - Je Hoon Jeong
- Department of NeurosurgeryHangang Sacred Heart Hospital, College of Medicine, Hallym University, Seoul, South Korea,
| | - Hyung Sik Hwang
- Department of NeurosurgeryHangang Sacred Heart Hospital, College of Medicine, Hallym University, Seoul, South Korea,
| | - Seung-Myung Moon
- Department of NeurosurgeryHangang Sacred Heart Hospital, College of Medicine, Hallym University, Seoul, South Korea,
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27
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Park JH, Lee CH, Kim IH, Ahn JH, Cho JH, Yan BC, Lee JC, Lee TH, Seo JY, Cho JH, Won MH, Kang IJ. Time-course changes in immunoreactivities of glucokinase and glucokinase regulatory protein in the gerbil hippocampus following transient cerebral ischemia. Neurochem Res 2013; 38:2640-9. [PMID: 24146201 DOI: 10.1007/s11064-013-1182-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Revised: 10/09/2013] [Accepted: 10/14/2013] [Indexed: 11/29/2022]
Abstract
Glucose is a main energy source for normal brain functions. Glucokinase (GK) plays an important role in glucose metabolism as a glucose sensor, and GK activity is modulated by glucokinase regulatory protein (GKRP). In this study, we examined the changes of GK and GKRP immunoreactivities in the gerbil hippocampus after 5 min of transient global cerebral ischemia. In the sham-operated-group, GK and GKRP immunoreactivities were easily detected in the pyramidal neurons of the stratum pyramidale of the hippocampus. GK and GKRP immunoreactivities in the pyramidal neurons were distinctively decreased in the hippocampal CA1 region (CA), not CA2/3, 3 days after ischemia-reperfusion (I-R). Five days after I-R, GK and GKRP immunoreactivities were hardly detected in the CA1, not CA2/3, pyramidal neurons; however, at this point in time, GK and GKRP immunoreactivities were newly expressed in astrocytes, not microglia, in the ischemic CA1. In brief, GK and GKRP immunoreactivities are changed in pyramidal neurons and newly expressed in astrocytes in the ischemic CA1 after transient cerebral ischemia. These indicate that changes of GK and GKRP expression may be related to the ischemia-induced neuronal damage/death.
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Affiliation(s)
- Joon Ha Park
- Department of Neurobiology, School of Medicine, Kangwon National University, Chuncheon, 200-701, South Korea
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28
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Sohrabji F, Bake S, Lewis DK. Age-related changes in brain support cells: Implications for stroke severity. Neurochem Int 2013; 63:291-301. [PMID: 23811611 PMCID: PMC3955169 DOI: 10.1016/j.neuint.2013.06.013] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Revised: 05/31/2013] [Accepted: 06/19/2013] [Indexed: 12/14/2022]
Abstract
Stroke is one of the leading causes of adult disability and the fourth leading cause of mortality in the US. Stroke disproportionately occurs among the elderly, where the disease is more likely to be fatal or lead to long-term supportive care. Animal models, where the ischemic insult can be controlled more precisely, also confirm that aged animals sustain more severe strokes as compared to young animals. Furthermore, the neuroprotection usually seen in younger females when compared to young males is not observed in older females. The preclinical literature thus provides a valuable resource for understanding why the aging brain is more susceptible to severe infarction. In this review, we discuss the hypothesis that stroke severity in the aging brain may be associated with reduced functional capacity of critical support cells. Specifically, we focus on astrocytes, that are critical for detoxification of the brain microenvironment and endothelial cells, which play a crucial role in maintaining the blood brain barrier. In view of the sex difference in stroke severity, this review also discusses studies of middle-aged acyclic females as well as the effects of the estrogen on astrocytes and endothelial cells.
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Affiliation(s)
- Farida Sohrabji
- Department of Neuroscience and Experimental Therapeutics, Women's Health in Neuroscience Program, Texas A&M HSC College of Medicine, Bryan, TX 77807, United States.
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29
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Park CW, Lee JC, Ahn JH, Lee DH, Cho GS, Yan BC, Park JH, Kim IH, Lee HY, Won MH, Cho JH. Neuronal damage using fluoro-Jade B histofluorescence and gliosis in the gerbil septum submitted to various durations of cerebral ischemia. Cell Mol Neurobiol 2013; 33:991-1001. [PMID: 23893372 DOI: 10.1007/s10571-013-9967-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2013] [Accepted: 07/16/2013] [Indexed: 12/12/2022]
Abstract
The extent of neuronal damage/death in some brain regions is highly correlated to duration time of transient ischemia. In the present study, we carried out neuronal degeneration/death and glial changes in the septum 4 days after 5, 10, 15, and 20 min of transient cerebral ischemia using gerbils. To examine neuronal damage, Fluoro-Jade B (F-J B, a marker for neuronal degeneration) histofluorescence staining was used. F-J B positive ((+)) cells were detected in the septo-hippocampal nucleus (SHN) of the septum only in the 20 min ischemia-group; the mean number of F-J B(+) neurons was 14.9 ± 2.5/400 μm(2) in a section. Gliosis of astrocytes and microglia was examined using anti-glial fibrillary acidic protein (GFAP) and anti-ionized calcium-binding adapter molecule 1 (Iba-1), respectively. In all the ischemia-groups, GFAP- and Iba-1-immunoreactive astrocytes and microglia, respectively, were increased in number, and apparently tended to be increased in their immunoreactivity. Especially, in the 20 min ischemia-group, the number and immunoreactivity of Iba-immunoreactive microglia was highest and strongest in the ischemic SHN 4 days after ischemia-reperfusion. In brief, our findings showed that neuronal damage/death in the SHN occurred and gliosis was apparently increased in the 20 min ischemia-group at 4 days after ischemia-reperfusion.
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Affiliation(s)
- Chan Woo Park
- Department of Emergency Medicine, and Institute of Medical Sciences, School of Medicine, Kangwon National University, Chuncheon, 200-701, South Korea
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Lee CY, Pappas GD, Kriho V, Huang BM, Yang HY. Proliferation of a subpopulation of reactive astrocytes following needle-insertion lesion in rat. Neurol Res 2013; 25:767-76. [PMID: 14579798 DOI: 10.1179/016164103101202156] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
It is well known that traumatic injuries of the CNS induce a gliotic reaction, characterized by the presence of reactive astrocytes. Reactive astrocytes exhibit enhanced expression of the astrocyte-specific intermediate filament, glial fibrillary acidic protein (GFAP), hypertrophy, and thickened processes. Recently, we have demonstrated that injuries of the CNS induce a re-expression of an embryonic intermediate filament-associated protein, IFAP-70/280 kDa. Based on IFAP-70/280 kDa immunolabeling, we have shown that reactive astrocytes, activated by stab-wound injury, can be divided into two major groups: 1. persistent IFAP+/GFAP+ cells which are close to the wound in the area of glial scar, and 2. transient IFAP-/GFAP+ cells which are farther from the wound. In this study, we use BrdU incorporation to examine proliferation in these two groups of reactive astrocytes induced by stab injury of the rat cerebrum. Triple/double-label immunofluorescence microscopy was performed using antibodies to IFAP-70/280 kDa, GFAP, and BrdU. The results showed that BrdU+ reactive astrocytes (GFAP+) were always IFAB-70/280 kDa+ as well. However, not all IFAP+ reactive astrocytes are BrdU+. BrdU+ signal was not observed in any IFAP- reactive astrocytes. At five days post-lesion, IFAP+ reactive astrocytes were increasing in the area of the wound (0-50 micrograms from the wound edge), but had reached a peak in the proximal area (50-800 micrograms away from the wound edge). At eight days post-lesion, IFAP+ reactive astrocytes achieved the highest percentage in the wound area. At the same time, BrdU-containing reactive astrocytes occupied an area closer to the wound. By 20 days post-lesion, following the formation of the gliotic scar at the stab-wound, a few IFAP+/GFAP+ cells still persisted. BrdU-containing reactive astrocytes were only observed in the scar. These results indicate that many IFAP+ reactive astrocytes close to the wound, in contrast to the IFAP- ones farther from the wound, appear to regain their proliferative potential to increase in number and participate in the formation of the gliotic scar.
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Affiliation(s)
- Chung-Ying Lee
- Department of Zoology, National Taiwan University, Taipei, Taiwan, ROC
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31
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Cho JM, Shin YJ, Park JM, Kim J, Lee MY. Characterization of nestin expression in astrocytes in the rat hippocampal CA1 region following transient forebrain ischemia. Anat Cell Biol 2013; 46:131-40. [PMID: 23869260 PMCID: PMC3713277 DOI: 10.5115/acb.2013.46.2.131] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2013] [Accepted: 05/02/2013] [Indexed: 11/27/2022] Open
Abstract
Recent studies have suggested that nestin facilitates cellular structural remodeling in vasculature-associated cells in response to ischemic injury. The current study was designed to investigate the potential role of post-ischemic nestin expression in parenchymal astrocytes. With this aim, we characterized ischemia-induced nestin expression in the CA1 hippocampal region, an area that undergoes a delayed neuronal death, followed by a lack of neuronal generation after transient forebrain ischemia. Virtually all of the nestin-positive cells in the ischemic CA1 hippocampus were reactive astrocytes. However, induction of nestin expression did not correlate simply with astrogliosis, but rather showed characteristic time- and strata-dependent expression patterns. Nestin induction in astrocytes of the pyramidal cell layer was rapid and transient, while a long-lasting induction of nestin was observed in astrocytes located in the CA1 dendritic subfields, such as the stratum oriens and radiatum, until at least day 28 after ischemia. There was no detectable expression in the stratum lacunosum moleculare despite the evident astroglial reaction. Almost all of the nestin-positive cells also expressed a transcription factor for neural/glial progenitors, i.e., Sox-2 or Sox-9, and some cells were also positive for Ki-67. However, all of the nestin-positive astrocytes expressed the calcium-binding protein S100β, which is known to be expressed in a distinct, post-mitotic astrocyte population. Thus, our data indicate that in the ischemic CA1 hippocampus, nestin expression was induced in astroglia that were becoming reactive, but not in a progenitor/stem cell population, suggesting that nestin may allow for the structural remodeling of these cells in response to ischemic injury.
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Affiliation(s)
- Jeong Min Cho
- Department of Anatomy and Cell Death Disease Research Center, The Catholic University of Korea College of Medicine, Seoul, Korea
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Iseki K, Hagino S, Nikaido T, Zhang Y, Mori T, Yokoya S, Hozumi Y, Goto K, Wanaka A, Tase C. Gliosis-specific transcription factor OASIS coincides with proteoglycan core protein genes in the glial scar and inhibits neurite outgrowth. Biomed Res 2013; 33:345-53. [PMID: 23268958 DOI: 10.2220/biomedres.33.345] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
OASIS gene, a member of the CREB/ATF transcription factor family, is upregulated in gliosis after CNS injury. However it remains to be determined how OASIS is implicated in gliotic reaction. In a glial scar, chondroitin sulfate proteoglycans (CSPGs) are also upregulated, which engenders the inhibition of axonal regeneration. We investigated the functional role of OASIS in gliosis in relation to CSPG core proteins that render lesions non-permissive for regenerating axons. We first examined the gene expression localization of OASIS using several markers in a cryo-injured mouse brain and compared the expression pattern of CSPG core protein genes with that of OASIS in a glial scar by double-labeling in situ hybridization. Our findings suggest that OASIS is induced in proximal reactive astrocytes that exhibit upregulated expression for CSPGs, including NG2 proteoglycan, versican, brevican, neurocan, and phosphacan core. Furthermore, the membrane fraction derived from OASIS-transfected C6 cells inhibits neurite outgrowth of NG108-15 cells, whereas its neurite outgrowth inhibitory effect is abrogated after chondroitinase ABC treatment. OASIS is likely to be involved in the regulatory mechanism of non-permissive environments for axonal outgrowth.
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Affiliation(s)
- Ken Iseki
- Department of Emergency and Critical Care Medicine, Yamagata University School of Medicine, Iida-nishi, Yamagata, Japan.
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Bento GA, Cunha VRD, Martinez R, Gomes FCA, Schanaider A. Avaliação da proteína acídica fibrilar glial como marcador da injúria por isquemia-reperfusão hepática. Rev Col Bras Cir 2013; 40:215-20. [DOI: 10.1590/s0100-69912013000300009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2012] [Accepted: 08/19/2012] [Indexed: 11/21/2022] Open
Abstract
OBJETIVO: Avaliar a expressão da Proteína Acídica Fibrilar Glial após a injúria por isquemia-reperfusão. MÉTODOS: vinte e quatro ratos foram distribuídos em quatro grupos: Controle, submetidos à anestesia e biópsia hepática; Simulação, injeção de heparina através da veia cava e dissecção do pedículo hepático superior, biópsia após 24 horas; Isquemia 30 minutos, mesmo procedimento do grupo Simulação, acrescido de clampeamento do pedículo hepático superior por 30 minutos; Isquemia 90 minutos, mesmo procedimento do grupo Isquemia 30 minutos, porém com período de clampeamento de 90 minutos. Após 24 horas de observação, os animais foram submetidos à laparotomia e seus fígados avaliados macroscopicamente, microscopicamente, por coloração de Hematoxilina-Eosina (HE) e submetidos à análise da expressão da GFAP por Western Blotting. RESULTADOS: Não se observou diferença no aspecto macroscópico dos fígados entre os diferentes grupos experimentais, tendo todos evidenciado morfologia normal. A análise por HE não evidenciou diferenças significativas, no que diz respeito à morfologia lobular. Por outro lado, nos grupos isquemia, foram encontrados infiltrados neutrofílicos e pequenas áreas de necrose. A expressão de GFAP foi semelhante em todos os grupos, seja qualitativamente quanto quantitativamente. CONCLUSÃO: A expressão da Proteína Acídica Fibrilar Glial não se alterou em nosso modelo de isquemia-reperfusão.
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O'Brien ER, Howarth C, Sibson NR. The role of astrocytes in CNS tumors: pre-clinical models and novel imaging approaches. Front Cell Neurosci 2013; 7:40. [PMID: 23596394 PMCID: PMC3627137 DOI: 10.3389/fncel.2013.00040] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Accepted: 03/26/2013] [Indexed: 02/06/2023] Open
Abstract
Brain metastasis is a significant clinical problem, yet the mechanisms governing tumor cell extravasation across the blood-brain barrier (BBB) and CNS colonization are unclear. Astrocytes are increasingly implicated in the pathogenesis of brain metastasis but in vitro work suggests both tumoricidal and tumor-promoting roles for astrocyte-derived molecules. Also, the involvement of astrogliosis in primary brain tumor progression is under much investigation. However, translation of in vitro findings into in vivo and clinical settings has not been realized. Increasingly sophisticated resources, such as transgenic models and imaging technologies aimed at astrocyte-specific markers, will enable better characterization of astrocyte function in CNS tumors. Techniques such as bioluminescence and in vivo fluorescent cell labeling have potential for understanding the real-time responses of astrocytes to tumor burden. Transgenic models targeting signaling pathways involved in the astrocytic response also hold great promise, allowing translation of in vitro mechanistic findings into pre-clinical models. The challenging nature of in vivo CNS work has slowed progress in this area. Nonetheless, there has been a surge of interest in generating pre-clinical models, yielding insights into cell extravasation across the BBB, as well as immune cell recruitment to the parenchyma. While the function of astrocytes in the tumor microenvironment is still unknown, the relationship between astrogliosis and tumor growth is evident. Here, we review the role of astrogliosis in both primary and secondary brain tumors and outline the potential for the use of novel imaging modalities in research and clinical settings. These imaging approaches have the potential to enhance our understanding of the local host response to tumor progression in the brain, as well as providing new, more sensitive diagnostic imaging methods.
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Affiliation(s)
- Emma R. O'Brien
- Department of Oncology, CR-UK/MRC Gray Institute for Radiation Oncology and Biology, Churchill Hospital, University of OxfordOxford, UK
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35
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Neuronal damage and gliosis in the somatosensory cortex induced by various durations of transient cerebral ischemia in gerbils. Brain Res 2013; 1510:78-88. [PMID: 23528266 DOI: 10.1016/j.brainres.2013.03.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2012] [Revised: 02/28/2013] [Accepted: 03/08/2013] [Indexed: 12/13/2022]
Abstract
Although many studies regarding ischemic brain damage in the gerbil have been reported, studies on neuronal damage according to various durations of ischemia-reperfusion (I-R) have been limited. In this study, we examined neuronal damage/death and glial changes in the somatosensory cortex 4 days after 5, 10 and 15 min of transient cerebral ischemia using the gerbil. To examine neuronal damage, we used Fluoro-Jade B (F-J B, a marker for neuronal degeneration) histofluorescence staining as well as cresyl violet (CV) staining and neuronal nuclei (NeuN, neuronal marker) immunohistochemistry. In the somatosensory cortex, some CV and NeuN positive (+) neurons were slightly decreased only in layers III and VI in the 5 min ischemia-group, and the number of CV+ and NeuN+ neurons were decreased with longer ischemic time. The F-J B histofluorescence staining showed a clear neuronal damage in layers III and VI, and the number of F-J B+ neurons was increased with time of ischemia-reperfusion: in the 15 min ischemia-group, the number of F-J B+ neurons was much higher in layer III than in layer VI. In addition, we immunohistochemically examined gliosis of astrocytes and microglia using anti-glial fibrillary acidic protein (GFAP) and anti-ionized calcium-binding adapter molecule 1 (Iba-1) antibody, respectively. In the 5 min ischemia-group, GFAP+ astrocytes and Iba-1+ microglia were distinctively increased in number, and their immunoreactivity was stronger than that in the sham-group. In the 10 and 15 min ischemia-groups, numbers of GFAP+ and Iba-1+ glial cells were much more increased with time of ischemia-reperfusion; in the 15 min ischemia-group, their distribution patterns of GFAP+ and Iba-1+ glial cells were similar to those in the 10 min ischemia-group. Our fining indicates that neuronal death/damage and gliosis of astrocytes and microglia were apparently increased with longer time of ischemia-reperfusion.
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36
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Reactive Astrocytes, Astrocyte Intermediate Filament Proteins, and Their Role in the Disease Pathogenesis. THE CYTOSKELETON 2013. [DOI: 10.1007/978-1-62703-266-7_13] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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37
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Castaño EM, Maarouf CL, Wu T, Leal MC, Whiteside CM, Lue LF, Kokjohn TA, Sabbagh MN, Beach TG, Roher AE. Alzheimer disease periventricular white matter lesions exhibit specific proteomic profile alterations. Neurochem Int 2012; 62:145-56. [PMID: 23231993 DOI: 10.1016/j.neuint.2012.12.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Revised: 11/26/2012] [Accepted: 12/01/2012] [Indexed: 12/13/2022]
Abstract
The white matter (WM) represents approximately half the cerebrum volume and is profoundly affected in Alzheimer's disease (AD). However, both the WM responses to AD as well as potential influences of this compartment to dementia pathogenesis remain comparatively neglected. Neuroimaging studies have revealed WM alterations are commonly associated with AD and renewed interest in examining the pathologic basis and importance of these changes. In AD subjects, immunohistochemistry and electron microscopy revealed changes in astrocyte morphology and myelin loss as well as up to 30% axonal loss in areas of WM rarefaction when measured against non-demented control (NDC) tissue. Comparative proteomic analyses were performed on pooled samples of periventricular WM (PVWM) obtained from AD (n=4) and NDC (n=5) subjects with both groups having a mean age of death of 86 years. All subjects had an apolipoprotein E ε3/3 genotype with the exception of one NDC subject who was ε2/3. Urea-detergent homogenates were analyzed using two different separation techniques: 2-dimensional isoelectric focusing/reverse-phase chromatography and 2-dimensional difference gel electrophoresis (2D-DIGE). Proteins with different expression levels between the 2 diagnostic groups were identified using MALDI-Tof/Tof mass spectrometry. In addition, Western blots were used to quantify proteins of interest in individual AD and NDC cases. Our proteomic studies revealed that when WM protein pools were loaded at equal amounts of total protein for comparative analyses, there were quantitative differences between the 2 groups. Molecules related to cytoskeleton maintenance, calcium metabolism and cellular survival such as glial fibrillary acidic protein, vimentin, tropomyosin, collapsin response mediator protein-2, calmodulin, S100-P, annexin A1, α-internexin, α- and β-synuclein, α-B-crystalline, fascin-1, ubiquitin carboxyl-terminal esterase and thymosine were altered between AD and NDC pools. Our experiments suggest that WM activities become globally impaired during the course of AD with significant morphological, biochemical and functional consequential implications for gray matter function and cognitive deficits. These observations may endorse the hypothesis that WM dysfunction is not only a consequence of AD pathology, but that it may precipitate and/or potentiate AD dementia.
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Affiliation(s)
- Eduardo M Castaño
- Fundación Instituto Leloir and Instituto de Investigaciones Bioquímicas de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Patricias Argentinas 435, Buenos Aires C1405BWE, Argentina.
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38
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Nehmé B, Henry M, Mouginot D, Drolet G. The Expression Pattern of the Na(+) Sensor, Na(X) in the Hydromineral Homeostatic Network: A Comparative Study between the Rat and Mouse. Front Neuroanat 2012; 6:26. [PMID: 22833716 PMCID: PMC3400090 DOI: 10.3389/fnana.2012.00026] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2012] [Accepted: 06/21/2012] [Indexed: 12/19/2022] Open
Abstract
The Scn7a gene encodes for the specific sodium channel NaX, which is considered a primary determinant of sodium sensing in the brain. Only partial data exist describing the NaX distribution pattern and the cell types that express NaX in both the rat and mouse brain. To generate a global view of the sodium detection mechanisms in the two rodent brains, we combined NaX immunofluorescence with fluorescent cell markers to map and identify the NaX-expressing cell populations throughout the network involved in hydromineral homeostasis. Here, we designed an anti-NaX antibody targeting the interdomain 2–3 region of the NaX channel’s α-subunit. In both the rat and mouse, NaX immunostaining was colocalized with vimentin positive cells in the median eminence and with magnocellular neurons immunopositive for neurophysin associated with oxytocin or vasopressin in both the supraoptic and paraventricular nuclei. NaX immunostaining was also detected in neurons of the area postrema. In addition to this common NaX expression pattern, several differences in NaX immunostaining for certain structures and cell types were found between the rat and mouse. NaX was present in both NeuN and vimentin positive cells in the subfornical organ and the vascular organ of the lamina terminalis of the rat whereas NaX was only colocalized with vimentin positive cells in the mouse circumventricular organs. In addition, NaX immunostaining was specifically observed in NeuN immunopositive cells in the median preoptic nucleus of the rat. Overall, this study characterized the NaX-expressing cell types in the network controlling hydromineral homeostasis of the rat and mouse. NaX expression pattern was clearly different in the nuclei of the lamina terminalis of the rat and mouse, indicating that the mechanisms involved in systemic and central Na+ sensing are specific to each rodent species.
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Affiliation(s)
- Benjamin Nehmé
- Axe Neurosciences du CRCHUQ (CHUL), Faculté de Médecine, Université Laval Québec, QC, Canada
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39
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Lewis DK, Thomas KT, Selvamani A, Sohrabji F. Age-related severity of focal ischemia in female rats is associated with impaired astrocyte function. Neurobiol Aging 2012; 33:1123.e1-16. [PMID: 22154819 PMCID: PMC5636220 DOI: 10.1016/j.neurobiolaging.2011.11.007] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2011] [Revised: 11/02/2011] [Accepted: 11/04/2011] [Indexed: 01/07/2023]
Abstract
In middle-aged female rats, focal ischemia leads to a larger cortical infarction as compared with younger females. To determine if stroke-induced cytotoxicity in middle-aged females was associated with impaired astrocyte function, astrocytes were harvested and cultured from the ischemic cortex of young and middle-aged female rats. Middle-aged astrocytes cleared significantly less glutamate from media as compared with young female astrocytes. Furthermore, astrocyte-conditioned media from middle-aged female astrocytes induced greater migration of peripheral blood monocyte cells (PBMCs) and expressed higher levels of the chemoattractant macrophage inflammatory protein-1 (MIP-1). Middle-aged astrocytes also induced greater migration of neural progenitor cells (NPCs), however, their ability to promote neuronal differentiation of neural progenitor cells was similar to young astrocytes. In males, where cortical infarct volume is similar in young and middle-aged animals, no age-related impairment was observed in astrocyte function. These studies show that the aging astrocyte may directly contribute to infarct severity by inefficient glutamate clearance and enhanced cytokine production and suggest a cellular target for improved stroke therapy among older females.
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Affiliation(s)
- Danielle K. Lewis
- Women’s Health in Neuroscience Program, Department of Neuroscience and Experimental Therapeutics, Texas A & M Health Science Center, College Station, TX, USA
| | - Kristen T. Thomas
- Women’s Health in Neuroscience Program, Department of Neuroscience and Experimental Therapeutics, Texas A & M Health Science Center, College Station, TX, USA
| | - Amutha Selvamani
- Women’s Health in Neuroscience Program, Department of Neuroscience and Experimental Therapeutics, Texas A & M Health Science Center, College Station, TX, USA
| | - Farida Sohrabji
- Women’s Health in Neuroscience Program, Department of Neuroscience and Experimental Therapeutics, Texas A & M Health Science Center, College Station, TX, USA
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l-3-n-butylphthalide improves cognitive deficits in rats with chronic cerebral ischemia. Neuropharmacology 2012; 62:2424-9. [DOI: 10.1016/j.neuropharm.2012.02.014] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Revised: 02/11/2012] [Accepted: 02/13/2012] [Indexed: 11/20/2022]
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Neuroprotective effects of adipose-derived stem cells against ischemic neuronal damage in the rabbit spinal cord. J Neurol Sci 2012; 317:40-6. [PMID: 22475376 DOI: 10.1016/j.jns.2012.02.035] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2011] [Revised: 02/25/2012] [Accepted: 02/29/2012] [Indexed: 12/16/2022]
Abstract
Transplantation of adipose-derived stem cells (ASCs) is one of the possible therapeutic tools for ischemic damage. In this study, we observed the effects of ASCs against ischemic damage in the ventral horn of L(5-6) levels in the rabbit spinal cord. ASCs were isolated from rabbits, and cell type was confirmed by flow cytometry analysis, labeling with CM-DiI dye and differentiation into adipocytes in adipogenesis differentiation medium. ASCs were administered intrathecally into recipient rabbits (2 × 10⁵) immediately after reperfusion following a 15-min aortic artery occlusion in the subrenal region. Transplantation of ASCs significantly improved functions of the hindlimb and morphology of the ventral horn of spinal cord although CM-DiI-labeled ASCs were not observed in the spinal cord parenchyma. In addition, transplantation of ASCs significantly increased brain-derived neurotrophic factor (BDNF) levels at 72h after ischemia/reperfusion. These results suggest that transplantation of ASCs prevents motor neurons from spinal ischemic damage and reactive gliosis by increasing neurotrophic factors such as BDNF in the spinal cord.
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Canales-Aguirre AA, Gomez-Pinedo UA, Luquin S, Ramírez-Herrera MA, Mendoza-Magaña ML, Feria-Velasco A. Curcumin protects against the oxidative damage induced by the pesticide parathion in the hippocampus of the rat brain. Nutr Neurosci 2012; 15:62-9. [PMID: 22333997 DOI: 10.1179/1476830511y.0000000034] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
UNLABELLED One of the main concerns regarding organophosphate pesticides (OP) is their possible toxic effects. Doses that do not produce acute toxicity are capable of altering the structure and biochemistry of different tissues and organs by production of reactive oxygen species (ROS). Curcumin (CUR) is the main substance in Curcuma longa (Zingiberacea) rhizome that has strong antioxidant activity. However, the neuroprotective properties of curcumin against oxidative stress induced by prolonged exposure to parathion (PAR) is not clear. OBJECTIVE The present work evaluated the protective effect of curcumin against the oxidative damage induced in the rat hippocampus by the OP PAR. METHODS Forty female Wistar rats were distributed in four groups as follows: exposed to PAR by inhalation (PAR group); pre-treated with CUR and then exposed to PAR by inhalation, (CUR + PAR group); exposed to environmental air and treated with CUR in the food (CUR group); and exposed to environmental air (the control group). At the end of the handling process, the concentration of erythrocyte cholinesterase was monitored, as indicator of PAR intoxication and lipoperoxidation, immunohistochemistry for astrocytes, and activated microglia and apoptosis was determined in the hippocampus. RESULTS In the present study, we show that the administration of CUR (200 mg/kg body weight) significantly diminished the oxidative damage in the hippocampus of rats exposed to the OP PAR. DISCUSSION These data suggest that CUR may be an alternative to prevent neurodegenerative damage after pesticide exposure.
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Affiliation(s)
- Alejandro A Canales-Aguirre
- Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco, A.C.-CIATEJ, Guadalajara, Jalisco, Mexico
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Cai M, Shin BY, Kim DH, Kim JM, Park SJ, Park CS, Won DH, Hong ND, Kang DH, Yutaka Y, Ryu JH. Neuroprotective effects of a traditional herbal prescription on transient cerebral global ischemia in gerbils. JOURNAL OF ETHNOPHARMACOLOGY 2011; 138:723-730. [PMID: 22020275 DOI: 10.1016/j.jep.2011.10.016] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2011] [Revised: 10/08/2011] [Accepted: 10/10/2011] [Indexed: 05/31/2023]
Abstract
AIM OF THE STUDY Kyung-Ok-Ko (KOK), a traditional herbal prescription composed of Rehmannia glutinosa var. purpurae, Panax ginseng, Poria cocos, Lycium chinense, Aquillaria agallocha and honey, has been used to treat age-related symptoms, such as amnesia or dementia, and has been shown to ameliorate scopolamine-induced memory impairment in mice. However, the effects of KOK on transient cerebral global ischemia-induced brain damage are unclear. MATERIALS AND METHODS Transient cerebral global ischemia was induced by occluding the bilateral common carotid artery for 5 min followed by reperfusion for 7 days. KOK (0.25, 0.5, 1, or 2 g/kg) was administered orally immediately after reperfusion and once a day over the next 7 days. Y-maze or novel object recognition tasks were to analyze learning and memory capabilities at 4 or 5 days after reperfusion, respectively. Histochemistry and immunohistochemistry were used for evaluation of the effect of KOK on neuronal degeneration. RESULTS Histochemical studies showed that KOK increased the number of viable cells detected by Nissl staining and decreased the number of degenerated neuronal cells detected by Fluoro-Jade B staining in the hippocampal CA1 region. In the immunohistochemical study, the sub-chronic KOK administration attenuated the ischemia-induced activation of microglia and astrocytes and the increase of cytokine IL-1β (P<0.05). In addition, KOK administration significantly attenuated the ischemia-induced cognitive impairments observed in the Y-maze and novel object recognition tasks (P<0.05). CONCLUSION These findings suggest that the neuroprotective effects of KOK may be mediated by its anti-inflammatory activities, resulting in the attenuation of memory impairment.
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Affiliation(s)
- Mudan Cai
- Department of Life and Nanopharmaceutical Science, Kyung Hee University, Seoul, Republic of Korea
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Astrocyte proliferation following stroke in the mouse depends on distance from the infarct. PLoS One 2011; 6:e27881. [PMID: 22132159 PMCID: PMC3221692 DOI: 10.1371/journal.pone.0027881] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2011] [Accepted: 10/27/2011] [Indexed: 01/12/2023] Open
Abstract
Reactive gliosis is a hallmark of brain pathology and the injury response, yet the extent to which astrocytes proliferate, and whether this is central to astrogliosis is still controversial. We determined the fraction of mature astrocytes that proliferate in a mouse stroke model using unbiased stereology as a function of distance from the infarct edge. Cumulatively 11.1±1.2% of Aldh1l1+ astrocytes within 400 µm in the cortical penumbra incorporate BrdU in the first week following stroke, while the overall number of astrocytes does not change. The number of astrocytes proliferating fell sharply with distance with more than half of all proliferating astrocytes found within 100 µm of the edge of the infarct. Despite extensive cell proliferation primarily of microglia and neutrophils/monocytes in the week following stroke, few mature astrocytes re-enter cell cycle, and these are concentrated close to the infarct boundary.
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Kelso ML, Liput DJ, Eaves DW, Nixon K. Upregulated vimentin suggests new areas of neurodegeneration in a model of an alcohol use disorder. Neuroscience 2011; 197:381-93. [PMID: 21958862 DOI: 10.1016/j.neuroscience.2011.09.019] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2011] [Revised: 08/28/2011] [Accepted: 09/08/2011] [Indexed: 12/16/2022]
Abstract
Excessive alcohol intake, characteristic of an alcohol use disorder (AUD), results in neurodegeneration as well as cognitive deficits that may recover in abstinence. Neurodegeneration in psychiatric disorders such as AUDs is due to various effects on tissue integrity. Several groups report that alcohol-induced neurodegeneration and recovery include a role for adult neurogenesis. Therefore, the initial purpose of this study was to investigate the effect of alcohol on the temporal profile of neural progenitor cells using the radial glia marker, vimentin, in a model of an AUD. However, striking vimentin expression throughout corticolimbic regions led, instead, to the discovery of a significant gliosis response in this model. Adult male rats were subjected to a 4-day binge model of an AUD and brains harvested for immunohistochemistry at 0, 2, 4, 7, 14, and 28 days following the last dose of ethanol. A prominent increase in vimentin immunoreactivity was apparent at 4 and 7 days post binge that returned to control levels by 14 days in the corticolimbic regions examined. Vimentin-positive cells co-labeled with glial fibrillary acidic protein (GFAP), which suggested that cells were reactive astrocytes. A second experiment supported that increased vimentin was not primarily due to alcohol withdrawal seizures and is more likely due to alcohol-induced cell death. As this gliosis was remarkably distinct in regions where cell death had not previously been reported in this model, adjacent tissue sections were processed for FluoroJade B staining for cell death. FluoroJade B-positive cells were evident immediately following the last ethanol dose as expected, but were significantly elevated in the hippocampal dentate gyrus and CA3 regions and corticolimbic regions from 2 to 7 days post binge. Intriguingly, vimentin labeling of astrogliosis is more widespread than FluoroJade B labeling of cell death, which suggests that 4-day binge ethanol consumption is more damaging than originally realized.
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Affiliation(s)
- M L Kelso
- Department of Pharmaceutical Sciences, The University of Kentucky College of Pharmacy, 789 S. Limestone, BPC 022A, Lexington, KY 40536-0596, USA
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Duan YL, Wang SY, Zeng QW, Su DS, Li W, Wang XR, Zhao Z. Astroglial reaction to delta opioid peptide [D-Ala2, D-Leu5] enkephalin confers neuroprotection against global ischemia in the adult rat hippocampus. Neuroscience 2011; 192:81-90. [PMID: 21745540 DOI: 10.1016/j.neuroscience.2011.06.067] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2011] [Revised: 06/14/2011] [Accepted: 06/23/2011] [Indexed: 01/19/2023]
Abstract
Delta opioid receptor (DOR) is essential for neuronal survival against hypoxic/ischemic damages. However, current understanding on how DOR activation affects astrocytic functions under ischemia remains incomplete. The present study investigated the astroglial responses to [d-Ala2, d-Leu5] enkephalin (DADLE) (a selective DOR agonist)-induced DOR activation after global cerebral ischemia. Adult male rats were preimplanted with intracerebral cannula and subjected to global ischemia for 10 min. The rats were divided into four groups: normal group (without any procedure), sham group (sham procedure with intracerebroventricular injection of ACSF), I/R group (ischemia procedure with intracerebroventricular injection of ACSF) and DAD-treated group (ischemia procedure with intracerebroventricular injection of DADLE). Hippocampal CA1 neuronal survival and activation of astrocytes were measured in the animals at 72 h post-ischemia. The distribution and phenotypes of p-Akt and active caspase-3 were also determined. The ischemic injury resulted in a significant neuronal loss and an increase in the dying astrocytes in the hippocampal CA1 region as compared with those in the sham animals (200.7±22.7/mm(2) vs. 6.6±3.1/mm(2), P<0.001). Improved neuronal survival in the DAD-treated animals was evident, which was accompanied by less dying astrocytes and enhanced astrocytes reaction with more active astrocytes than that in the I/R group (267.6±13.2/mm(2) vs. 157.0±18.1/mm(2), P<0.01) and a significantly increased immunoreactivity of p-Akt. However, the active caspase-3 positive cells were also evident in DAD-treated group (313.0±23.1/mm(2)) and significantly increased as compared with those of the sham group (159.0±15.8/mm(2), P<0.001) or I/R group (193.6±26.2/mm(2), P<0.01). Most of the active caspase-3-expressing cells were colabeled with glial fibrillary acidic protein (GFAP), an astrocytes marker. We conclude that the post-ischemic treatment with DADLE promotes beneficial astrocytes activation and induces astroglial apoptosis 72 h after reperfusion which may be involved in reducing their harmful effect to neurons survival.
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Affiliation(s)
- Y-L Duan
- Key Laboratory of Brain Functional Genomics, Ministry of Education, Shanghai Key Laboratory of Brain Functional Genomics, East China Normal University, Shanghai 200062, China
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Kim JM, Kim S, Kim DH, Lee CH, Park SJ, Jung JW, Ko KH, Cheong JH, Lee SH, Ryu JH. Neuroprotective effect of forsythiaside against transient cerebral global ischemia in gerbil. Eur J Pharmacol 2011; 660:326-33. [DOI: 10.1016/j.ejphar.2011.03.051] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2010] [Revised: 03/07/2011] [Accepted: 03/28/2011] [Indexed: 10/18/2022]
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Ryu HJ, Kim JE, Yeo SI, Kang TC. p65/RelA-Ser529 NF-κB Subunit Phosphorylation Induces Autophagic Astroglial Death (Clasmatodendrosis) Following Status Epilepticus. Cell Mol Neurobiol 2011; 31:1071-8. [DOI: 10.1007/s10571-011-9706-1] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2011] [Accepted: 05/04/2011] [Indexed: 01/25/2023]
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Lee CH, Yan B, Yoo KY, Choi JH, Kwon SH, Her S, Sohn Y, Hwang IK, Cho JH, Kim YM, Won MH. Ischemia-induced changes in glucagon-like peptide-1 receptor and neuroprotective effect of its agonist, exendin-4, in experimental transient cerebral ischemia. J Neurosci Res 2011; 89:1103-13. [PMID: 21472764 DOI: 10.1002/jnr.22596] [Citation(s) in RCA: 97] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2010] [Revised: 11/30/2010] [Accepted: 12/16/2010] [Indexed: 12/14/2022]
Abstract
Glucagon-like peptide-1 receptor (GLP-1R) protects against neuronal damages in the brain. In the present study, ischemia-induced changes in GLP-1R immunoreactivity in the gerbil hippocampal CA1 region were evaluated after transient cerebral ischemia; in addition, the neuroprotective effect of the GLP-1R agonist exendin-4 (EX-4) against ischemic damage was studied. GLP-1R immunoreactivity and its protein levels in the ischemic CA1 region were highest at 1 day after ischemia/reperfusion (I/R). At 4 days after I/R, GLP-1R immunoreactivity was hardly detected in CA1 pyramidal neurons, and its protein level was lowest. GLP-1R protein level was increased again at 10 days after I/R, and GLP-1R immunoreactivity was found in astrocytes and GABAergic interneurons. In addition, EX-4 treatment attenuated ischemia-induced hyperactivity, neuronal damage, and microglial activation in the ischemic CA1 region in a dose-dependent manner. EX-4 treatment also induced the elevation of GLP-1R immunoreactivity and protein levels in the ischemic CA1 region. These results indicate that GLP-1R is altered in the ischemic region after an ischemic insult and that EX-4 protects against ischemia-induced neuronal death possibly by increasing GLP-1R expression and attenuating microglial activation against transient cerebral ischemic damage.
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Affiliation(s)
- Choong Hyun Lee
- Laboratory of Veterinary Pharmacology, College of Veterinary Medicine, Seoul National University, Seoul, South Korea
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Sidoryk-Wegrzynowicz M, Wegrzynowicz M, Lee E, Bowman AB, Aschner M. Role of astrocytes in brain function and disease. Toxicol Pathol 2010; 39:115-23. [PMID: 21075920 DOI: 10.1177/0192623310385254] [Citation(s) in RCA: 157] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Astrocytes assume multiple roles in maintaining an optimally suited milieu for neuronal function. Select astrocytic functions include the maintenance of redox potential, the production of trophic factors, the regulation of neurotransmitter and ion concentrations, and the removal of toxins and debris from the cerebrospinal fluid (CSF). Impairments in these and other functions, as well as physiological reactions of astrocytes to injury, can trigger or exacerbate neuronal dysfunction. This review addresses select metabolic interactions between neurons and astrocytes and emphasizes the role of astrocytes in mediating and amplifying the progression of several neurodegenerative disorders, such as Parkinson's disease (PD), hepatic encephalopathy (HE), hyperammonemia (HA), Alzheimer's disease (AD), and ischemia.
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