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de Abreu MS, Giacomini ACVV, Zanandrea R, Dos Santos BE, Genario R, de Oliveira GG, Friend AJ, Amstislavskaya TG, Kalueff AV. Psychoneuroimmunology and immunopsychiatry of zebrafish. Psychoneuroendocrinology 2018; 92:1-12. [PMID: 29609110 DOI: 10.1016/j.psyneuen.2018.03.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 03/14/2018] [Accepted: 03/21/2018] [Indexed: 12/11/2022]
Abstract
Despite the high prevalence of neural and immune disorders, their etiology and molecular mechanisms remain poorly understood. As the zebrafish (Danio rerio) is increasingly utilized as a powerful model organism in biomedical research, mounting evidence suggests these fish as a useful tool to study neural and immune mechanisms and their interplay. Here, we discuss zebrafish neuro-immune mechanisms and their pharmacological and genetic modulation, the effect of stress on cytokines, as well as relevant models of microbiota-brain interplay. As many human brain diseases are based on complex interplay between the neural and the immune system, here we discuss zebrafish models, as well as recent successes and challenges, in this rapidly expanding field. We particularly emphasize the growing utility of zebrafish models in translational immunopsychiatry research, as they improve our understanding of pathogenetic neuro-immune interactions, thereby fostering future discovery of potential therapeutic agents.
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Affiliation(s)
- Murilo S de Abreu
- Bioscience Institute, University of Passo Fundo (UPF), Passo Fundo, RS, Brazil; Postgraduate Program in Pharmacology, Federal University of Santa Maria (UFSM), Santa Maria, Brazil; The International Zebrafish Neuroscience Research Consortium (ZNRC), Slidell, LA, USA
| | - Ana C V V Giacomini
- Bioscience Institute, University of Passo Fundo (UPF), Passo Fundo, RS, Brazil; Postgraduate Program in Pharmacology, Federal University of Santa Maria (UFSM), Santa Maria, Brazil; Postgraduate Program in Environmental Sciences, University of Passo Fundo (UPF), Passo Fundo, Brazil
| | - Rodrigo Zanandrea
- Bioscience Institute, University of Passo Fundo (UPF), Passo Fundo, RS, Brazil
| | - Bruna E Dos Santos
- Bioscience Institute, University of Passo Fundo (UPF), Passo Fundo, RS, Brazil
| | - Rafael Genario
- Bioscience Institute, University of Passo Fundo (UPF), Passo Fundo, RS, Brazil
| | | | - Ashton J Friend
- Tulane University School of Science and Engineering, New Orleans, LA, USA
| | - Tamara G Amstislavskaya
- Research Institute of Physiology and Basic Medicine SB RAS, and Department of Neuroscience, Novosibirsk State University, Novosibirsk, Russia
| | - Allan V Kalueff
- School of Pharmacy, Southwest University, Chongqing, China; Ural Federal University, Ekaterinburg, Russia; ZENEREI Research Center, Slidell, LA, USA; Institute of Translational Biomedicine, St. Petersburg State University, St. Petersburg, Russia; Institute of Experimental Medicine, Almazov National Medical Research Center, St. Petersburg, Russia; Russian Research Center for Radiology and Surgical Technologies, Pesochny, Russia; Laboratory of Translational Biopsychiatry, Research Institute of Physiology and Basic Medicine SB RAS, Novosibirsk, Russia.
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202
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Mitchell DM, Lovel AG, Stenkamp DL. Dynamic changes in microglial and macrophage characteristics during degeneration and regeneration of the zebrafish retina. J Neuroinflammation 2018; 15:163. [PMID: 29804544 PMCID: PMC5971432 DOI: 10.1186/s12974-018-1185-6] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Accepted: 04/30/2018] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND In contrast to mammals, zebrafish have the capacity to regenerate retinal neurons following a variety of injuries. Two types of glial cells, Müller glia (MG) and microglia, are known to exist in the zebrafish retina. Recent work has shown that MG give rise to regenerated retinal neurons, but the role of resident microglia, and the innate immune system more generally, during retinal regeneration is not well defined. Specifically, characteristics of the immune system and microglia following substantial neuron death and a successful regenerative response have not been documented. METHODS The neurotoxin ouabain was used to induce a substantial retinal lesion of the inner retina in zebrafish. This lesion results in a regenerative response that largely restores retinal architecture, neuronal morphologies, and connectivities, as well as recovery of visual function. We analyzed cryosections from damaged eyes following immunofluorescence and H&E staining to characterize the initial immune response to the lesion. Whole retinas were analyzed by confocal microscopy to characterize microglia morphology and distribution. Statistical analysis was performed using a two-tailed Student's t test comparing damaged to control samples. RESULTS We find evidence of early leukocyte infiltration to the retina in response to ouabain injection followed by a period of immune cell proliferation that likely includes both resident microglia and substantial numbers of proliferating, extra-retinally derived macrophages, leading to rapid accumulation upon retinal damage. Following immune cell proliferation, Müller glia re-enter the cell cycle. In retinas that have regenerated the layers lost to the initial injury (histologically regenerated), microglia retain morphological features of activation, suggesting ongoing functions that are likely essential to restoration of retinal function. CONCLUSIONS Collectively, these results indicate that microglia and the immune system are dynamic during a successful regenerative response in the retina. This study provides an important framework to probe inflammation in the initiation of, and functional roles of microglia during retinal regeneration.
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Affiliation(s)
- Diana M. Mitchell
- Department of Biological Sciences, University of Idaho, 875 Perimeter Drive, MS 3051, Moscow, ID 83844-3051 USA
| | - Anna G. Lovel
- Department of Biological Sciences, University of Idaho, 875 Perimeter Drive, MS 3051, Moscow, ID 83844-3051 USA
| | - Deborah L. Stenkamp
- Department of Biological Sciences, University of Idaho, 875 Perimeter Drive, MS 3051, Moscow, ID 83844-3051 USA
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203
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Ricci L, Srivastava M. Wound-induced cell proliferation during animal regeneration. WILEY INTERDISCIPLINARY REVIEWS-DEVELOPMENTAL BIOLOGY 2018; 7:e321. [PMID: 29719123 DOI: 10.1002/wdev.321] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Revised: 03/20/2018] [Accepted: 03/20/2018] [Indexed: 12/19/2022]
Abstract
Many animal species are capable of replacing missing tissues that are lost upon injury or amputation through the process of regeneration. Although the extent of regeneration is variable across animals, that is, some animals can regenerate any missing cell type whereas some can only regenerate certain organs or tissues, regulated cell proliferation underlies the formation of new tissues in most systems. Notably, many species display an increase in proliferation within hours or days upon wounding. While different cell types proliferate in response to wounding in various animal taxa, comparative molecular data are beginning to point to shared wound-induced mechanisms that regulate cell division during regeneration. Here, we synthesize current insights about early molecular pathways of regeneration from diverse model and emerging systems by considering these species in their evolutionary contexts. Despite the great diversity of mechanisms underlying injury-induced cell proliferation across animals, and sometimes even in the same species, similar pathways for proliferation have been implicated in distantly related species (e.g., small diffusible molecules, signaling from apoptotic cells, growth factor signaling, mTOR and Hippo signaling, and Wnt and Bmp pathways). Studies that explicitly interrogate molecular and cellular regenerative mechanisms in understudied animal phyla will reveal the extent to which early pathways in the process of regeneration are conserved or independently evolved. This article is categorized under: Comparative Development and Evolution > Body Plan Evolution Adult Stem Cells, Tissue Renewal, and Regeneration > Regeneration Comparative Development and Evolution > Model Systems.
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Affiliation(s)
- Lorenzo Ricci
- Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, Massachusetts
| | - Mansi Srivastava
- Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, Massachusetts
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204
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Larson TA. Sex Steroids, Adult Neurogenesis, and Inflammation in CNS Homeostasis, Degeneration, and Repair. Front Endocrinol (Lausanne) 2018; 9:205. [PMID: 29760681 PMCID: PMC5936772 DOI: 10.3389/fendo.2018.00205] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Accepted: 04/12/2018] [Indexed: 01/16/2023] Open
Abstract
Sex steroidal hormones coordinate the development and maintenance of tissue architecture in many organs, including the central nervous systems (CNS). Within the CNS, sex steroids regulate the morphology, physiology, and behavior of a wide variety of neural cells including, but not limited to, neurons, glia, endothelial cells, and immune cells. Sex steroids spatially and temporally control distinct molecular networks, that, in turn modulate neural activity, synaptic plasticity, growth factor expression and function, nutrient exchange, cellular proliferation, and apoptosis. Over the last several decades, it has become increasingly evident that sex steroids, often in conjunction with neuroinflammation, have profound impact on the occurrence and severity of neuropsychiatric and neurodegenerative disorders. Here, I review the foundational discoveries that established the regulatory role of sex steroids in the CNS and highlight recent advances toward elucidating the complex interaction between sex steroids, neuroinflammation, and CNS regeneration through adult neurogenesis. The majority of recent work has focused on neuroinflammatory responses following acute physical damage, chronic degeneration, or pharmacological insult. Few studies directly assess the role of immune cells in regulating adult neurogenesis under healthy, homeostatic conditions. As such, I also introduce tractable, non-traditional models for examining the role of neuroimmune cells in natural neuronal turnover, seasonal plasticity of neural circuits, and extreme CNS regeneration.
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Affiliation(s)
- Tracy A. Larson
- Department of Biology, University of Virginia, Charlottesville, VA, United States
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205
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Joven A, Simon A. Homeostatic and regenerative neurogenesis in salamanders. Prog Neurobiol 2018; 170:81-98. [PMID: 29654836 DOI: 10.1016/j.pneurobio.2018.04.006] [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: 12/01/2017] [Revised: 03/20/2018] [Accepted: 04/07/2018] [Indexed: 01/02/2023]
Abstract
Large-scale regeneration in the adult central nervous system is a unique capacity of salamanders among tetrapods. Salamanders can replace neuronal populations, repair damaged nerve fibers and restore tissue architecture in retina, brain and spinal cord, leading to functional recovery. The underlying mechanisms have long been difficult to study due to the paucity of available genomic tools. Recent technological progress, such as genome sequencing, transgenesis and genome editing provide new momentum for systematic interrogation of regenerative processes in the salamander central nervous system. Understanding central nervous system regeneration also entails designing the appropriate molecular, cellular, and behavioral assays. Here we outline the organization of salamander brain structures. With special focus on ependymoglial cells, we integrate cellular and molecular processes of neurogenesis during developmental and adult homeostasis as well as in various injury models. Wherever possible, we correlate developmental and regenerative neurogenesis to the acquisition and recovery of behaviors. Throughout the review we place the findings into an evolutionary context for inter-species comparisons.
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Affiliation(s)
- Alberto Joven
- Department of Cell and Molecular Biology, Karolinska Institute, Berzelius väg 35, 17177, Stockholm, Sweden.
| | - András Simon
- Department of Cell and Molecular Biology, Karolinska Institute, Berzelius väg 35, 17177, Stockholm, Sweden.
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206
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Abnave P, Ghigo E. Role of the immune system in regeneration and its dynamic interplay with adult stem cells. Semin Cell Dev Biol 2018; 87:160-168. [PMID: 29635020 DOI: 10.1016/j.semcdb.2018.04.002] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 04/02/2018] [Accepted: 04/06/2018] [Indexed: 12/11/2022]
Abstract
The immune system plays an indispensable role in the process of tissue regeneration following damage as well as during homeostasis. Inflammation and immune cell recruitment are signs of early onset injury. At the wound site, immune cells not only help to clear debris but also secrete numerous signalling molecules that induce appropriate cell proliferation and differentiation programmes essential for successful regeneration. However, the immune system does not always perform a complementary role in regeneration and several reports have suggested that increased inflammation can inhibit the regeneration process. Successful regeneration requires a balanced immune cell response, with the recruitment of accurately polarised immune cells in an appropriate quantity. The regulatory interactions of the immune system with regeneration are not unidirectional. Stem cells, as key players in regeneration, can also modulate the immune system in several ways to facilitate regeneration. In this review, we will focus on recent research demonstrating the key role of immune system in the regeneration process as well as the immunomodulatory effects of stem cells. Finally, we propose that research investigating the interplay between the immune system and stem cells within highly regenerating animals can benefit the identification of the key interactions and molecules required for successful regeneration.
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Affiliation(s)
- Prasad Abnave
- URMITE, CNRS UMR 7278, IRD198, INSERM U1095, APHM, Institut Hospitalier Universitaire Méditerranée-Infection, Aix-Marseille Université, 19-21 Bd Jean Moulin, 13385 Marseille Cedex 05, France.
| | - Eric Ghigo
- Institut Hospitalier Universitaire Méditerranée-Infection, 19-21 Bd Jean Moulin, 13385 Marseille Cedex 05, France; CNRS, 21 chemin de Joseph Aiguier, 13009 Marseille.
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207
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Yang W, Hu P. Skeletal muscle regeneration is modulated by inflammation. J Orthop Translat 2018; 13:25-32. [PMID: 29662788 PMCID: PMC5892385 DOI: 10.1016/j.jot.2018.01.002] [Citation(s) in RCA: 154] [Impact Index Per Article: 25.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 01/08/2018] [Accepted: 01/09/2018] [Indexed: 01/01/2023] Open
Abstract
Skeletal muscle regeneration is a complex process orchestrated by multiple steps. Recent findings indicate that inflammatory responses could play central roles in bridging initial muscle injury responses and timely muscle injury reparation. The various types of immune cells and cytokines have crucial roles in muscle regeneration process. In this review, we briefly summarise the functions of acute inflammation in muscle regeneration. THE TRANSLATIONAL POTENTIAL OF THIS ARTICLE Immune system is closely relevant to the muscle regeneration. Understanding the mechanisms of inflammation in muscle regeneration is therefore critical for the development of effective regenerative, and therapeutic strategies in muscular disorders. This review provides information for muscle regeneration research regarding the effects of inflammation on muscle regeneration.
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Affiliation(s)
| | - Ping Hu
- State Key Laboratory of Cell Biology, Center of Excellence in Molecular and Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, 320 Yueyang Road, Shanghai, 200031, China
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208
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Weger M, Diotel N, Weger BD, Beil T, Zaucker A, Eachus HL, Oakes JA, do Rego JL, Storbeck KH, Gut P, Strähle U, Rastegar S, Müller F, Krone N. Expression and activity profiling of the steroidogenic enzymes of glucocorticoid biosynthesis and the fdx1 co-factors in zebrafish. J Neuroendocrinol 2018; 30:e12586. [PMID: 29486070 DOI: 10.1111/jne.12586] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 02/06/2018] [Accepted: 02/22/2018] [Indexed: 01/23/2023]
Abstract
The spatial and temporal expression of steroidogenic genes in zebrafish has not been fully characterised. Because zebrafish are increasingly employed in endocrine and stress research, a better characterisation of steroidogenic pathways is required to target specific steps in the biosynthetic pathways. In the present study, we have systematically defined the temporal and spatial expression of steroidogenic enzymes involved in glucocorticoid biosynthesis (cyp21a2, cyp11c1, cyp11a1, cyp11a2, cyp17a1, cyp17a2, hsd3b1, hsd3b2), as well as the mitochondrial electron-providing ferredoxin co-factors (fdx1, fdx1b), during zebrafish development. Our studies showed an early expression of all these genes during embryogenesis. In larvae, expression of cyp11a2, cyp11c1, cyp17a2, cyp21a2, hsd3b1 and fdx1b can be detected in the interrenal gland, which is the zebrafish counterpart of the mammalian adrenal gland, whereas the fdx1 transcript is mainly found in the digestive system. Gene expression studies using quantitative reverse transcriptase-PCR and whole-mount in situ hybridisation in the adult zebrafish brain revealed a wide expression of these genes throughout the encephalon, including neurogenic regions. Using ultra-high-performance liquid chromatography tandem mass spectrometry, we were able to demonstrate the presence of the glucocorticoid cortisol in the adult zebrafish brain. Moreover, we demonstrate de novo biosynthesis of cortisol and the neurosteroid tetrahydrodeoxycorticosterone in the adult zebrafish brain from radiolabelled pregnenolone. Taken together, the present study comprises a comprehensive characterisation of the steroidogenic genes and the fdx co-factors facilitating glucocorticoid biosynthesis in zebrafish. Furthermore, we provide additional evidence of de novo neurosteroid biosynthesising in the brain of adult zebrafish facilitated by enzymes involved in glucocorticoid biosynthesis. Our study provides a valuable source for establishing the zebrafish as a translational model with respect to understanding the roles of the genes for glucocorticoid biosynthesis and fdx co-factors during embryonic development and stress, as well as in brain homeostasis and function.
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Affiliation(s)
- M Weger
- College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
| | - N Diotel
- INSERM, UMR 1188, Diabète athérothrombose Thérapies Réunion Océan Indien (DéTROI), Université de La Réunion, Saint-Denis de La Réunion, France
| | - B D Weger
- Nestlé Institute of Health Sciences SA, Lausanne, Switzerland
| | - T Beil
- Institute of Toxicology and Genetics, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
| | - A Zaucker
- College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
| | - H L Eachus
- Department of Oncology and Metabolism, University of Sheffield, Sheffield, UK
- Department of Biomedical Science, The Bateson Centre, Sheffield, UK
| | - J A Oakes
- Department of Oncology and Metabolism, University of Sheffield, Sheffield, UK
- Department of Biomedical Science, The Bateson Centre, Sheffield, UK
| | - J L do Rego
- Plateforme d'Analyse Comportementale (SCAC), Institut de Recherche et d'Innovation Biomédicale, Inserm U1234, Université de Rouen, Rouen Cedex, France
| | - K-H Storbeck
- Department of Biochemistry, Stellenbosch University, Stellenbosch, South Africa
| | - P Gut
- Nestlé Institute of Health Sciences SA, Lausanne, Switzerland
| | - U Strähle
- Institute of Toxicology and Genetics, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
| | - S Rastegar
- Institute of Toxicology and Genetics, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany
| | - F Müller
- College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
| | - N Krone
- College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
- Department of Oncology and Metabolism, University of Sheffield, Sheffield, UK
- Department of Biomedical Science, The Bateson Centre, Sheffield, UK
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209
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Barald KF, Shen YC, Bianchi LM. Chemokines and cytokines on the neuroimmunoaxis: Inner ear neurotrophic cytokines in development and disease. Prospects for repair? Exp Neurol 2018; 301:92-99. [DOI: 10.1016/j.expneurol.2017.10.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 09/18/2017] [Accepted: 10/12/2017] [Indexed: 01/22/2023]
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210
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Interactions between the Immune and Nervous systems in Nervous System Development, Diseases and Repair Processes. Exp Neurol 2018; 301:81-82. [DOI: 10.1016/j.expneurol.2018.01.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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211
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Chia K, Mazzolini J, Mione M, Sieger D. Tumor initiating cells induce Cxcr4-mediated infiltration of pro-tumoral macrophages into the brain. eLife 2018; 7:e31918. [PMID: 29465400 PMCID: PMC5821457 DOI: 10.7554/elife.31918] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Accepted: 01/31/2018] [Indexed: 12/28/2022] Open
Abstract
It is now clear that microglia and macrophages are present in brain tumors, but whether or how they affect initiation and development of tumors is not known. Exploiting the advantages of the zebrafish (Danio rerio) model, we showed that macrophages and microglia respond immediately upon oncogene activation in the brain. Overexpression of human AKT1 within neural cells of larval zebrafish led to a significant increase in the macrophage and microglia populations. By using a combination of transgenic and mutant zebrafish lines, we showed that this increase was caused by the infiltration of peripheral macrophages into the brain mediated via Sdf1b-Cxcr4b signaling. Intriguingly, confocal live imaging reveals highly dynamic interactions between macrophages/microglia and pre-neoplastic cells, which do not result in phagocytosis of pre-neoplastic cells. Finally, depletion of macrophages and microglia resulted in a significant reduction of oncogenic cell proliferation. Thus, macrophages and microglia show tumor promoting functions already during the earliest stages of the developing tumor microenvironment.
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Affiliation(s)
- Kelda Chia
- Centre for Discovery Brain SciencesUniversity of EdinburghEdinburghUnited Kingdom
| | - Julie Mazzolini
- Centre for Discovery Brain SciencesUniversity of EdinburghEdinburghUnited Kingdom
| | - Marina Mione
- Centre for Integrative Biology (CIBIO)University of TrentoTrentoItaly
| | - Dirk Sieger
- Centre for Discovery Brain SciencesUniversity of EdinburghEdinburghUnited Kingdom
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212
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Gauberti M, Fournier AP, Docagne F, Vivien D, Martinez de Lizarrondo S. Molecular Magnetic Resonance Imaging of Endothelial Activation in the Central Nervous System. Theranostics 2018; 8:1195-1212. [PMID: 29507614 PMCID: PMC5835930 DOI: 10.7150/thno.22662] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2017] [Accepted: 01/12/2018] [Indexed: 01/01/2023] Open
Abstract
Endothelial cells of the central nervous system over-express surface proteins during neurological disorders, either as a cause, or a consequence, of the disease. Since the cerebral vasculature is easily accessible by large contrast-carrying particles, it constitutes a target of choice for molecular magnetic resonance imaging (MRI). In this review, we highlight the most recent advances in molecular MRI of brain endothelial activation and focus on the development of micro-sized particles of iron oxide (MPIO) targeting adhesion molecules including intercellular adhesion molecule 1 (ICAM-1), vascular cell adhesion molecule 1 (VCAM-1), P-Selectin and E-Selectin. We also discuss the perspectives and challenges for the clinical application of this technology in neurovascular disorders (ischemic stroke, intracranial hemorrhage, subarachnoid hemorrhage, diabetes mellitus), neuroinflammatory disorders (multiple sclerosis, brain infectious diseases, sepsis), neurodegenerative disorders (Alzheimer's disease, vascular dementia, aging) and brain cancers (primitive neoplasms, metastasis).
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Affiliation(s)
- Maxime Gauberti
- Normandie Univ, UNICAEN, INSERM, INSERM UMR-S U1237, Physiopathology and Imaging for Neurological Disorders (PhIND), Cyceron, 14000 Caen, France
- CHU Caen, Department of diagnostic imaging and interventional radiology, CHU de Caen Côte de Nacre, Caen, France
| | - Antoine P. Fournier
- Normandie Univ, UNICAEN, INSERM, INSERM UMR-S U1237, Physiopathology and Imaging for Neurological Disorders (PhIND), Cyceron, 14000 Caen, France
| | - Fabian Docagne
- Normandie Univ, UNICAEN, INSERM, INSERM UMR-S U1237, Physiopathology and Imaging for Neurological Disorders (PhIND), Cyceron, 14000 Caen, France
| | - Denis Vivien
- Normandie Univ, UNICAEN, INSERM, INSERM UMR-S U1237, Physiopathology and Imaging for Neurological Disorders (PhIND), Cyceron, 14000 Caen, France
- CHU Caen, Clinical Research Department, CHU de Caen Côte de Nacre, Caen, France
| | - Sara Martinez de Lizarrondo
- Normandie Univ, UNICAEN, INSERM, INSERM UMR-S U1237, Physiopathology and Imaging for Neurological Disorders (PhIND), Cyceron, 14000 Caen, France
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213
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Lindsey BW, Douek AM, Loosli F, Kaslin J. A Whole Brain Staining, Embedding, and Clearing Pipeline for Adult Zebrafish to Visualize Cell Proliferation and Morphology in 3-Dimensions. Front Neurosci 2018; 11:750. [PMID: 29386991 PMCID: PMC5776138 DOI: 10.3389/fnins.2017.00750] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Accepted: 12/22/2017] [Indexed: 01/08/2023] Open
Abstract
The field of macro-imaging has grown considerably with the appearance of innovative clearing methods and confocal microscopes with lasers capable of penetrating increasing tissue depths. The ability to visualize and model the growth of whole organs as they develop from birth, or with manipulation, disease or injury, provides new ways of thinking about development, tissue-wide signaling, and cell-to-cell interactions. The zebrafish (Danio rerio) has ascended from a predominantly developmental model to a leading adult model of tissue regeneration. The unmatched neurogenic and regenerative capacity of the mature central nervous system, in particular, has received much attention, however tools to interrogate the adult brain are sparse. At present there exists no straightforward methods of visualizing changes in the whole adult brain in 3-dimensions (3-D) to examine systemic patterns of cell proliferation or cell populations of interest under physiological, injury, or diseased conditions. The method presented here is the first of its kind to offer an efficient step-by-step pipeline from intraperitoneal injections of the proliferative marker, 5-ethynyl-2′-deoxyuridine (EdU), to whole brain labeling, to a final embedded and cleared brain sample suitable for 3-D imaging using optical projection tomography (OPT). Moreover, this method allows potential for imaging GFP-reporter lines and cell-specific antibodies in the presence or absence of EdU. The small size of the adult zebrafish brain, the highly consistent degree of EdU labeling, and the use of basic clearing agents, benzyl benzoate, and benzyl alcohol, makes this method highly tractable for most laboratories interested in understanding the vertebrate central nervous system in health and disease. Post-processing of OPT-imaged adult zebrafish brains injected with EdU illustrate that proliferative patterns in EdU can readily be observed and analyzed using IMARIS and/or FIJI/IMAGEJ software. This protocol will be a valuable tool to unlock new ways of understanding systemic patterns in cell proliferation in the healthy and injured brain, brain-wide cellular interactions, stem cell niche development, and changes in brain morphology.
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Affiliation(s)
- Benjamin W Lindsey
- Australian Regenerative Medicine Institute, Monash University, Clayton, VIC, Australia
| | - Alon M Douek
- Australian Regenerative Medicine Institute, Monash University, Clayton, VIC, Australia
| | - Felix Loosli
- Institute of Toxicology and Genetics, Karlsruhe Institute of Technology, Karlsruhe, Germany
| | - Jan Kaslin
- Australian Regenerative Medicine Institute, Monash University, Clayton, VIC, Australia
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214
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Kizil C. Mechanisms of Pathology-Induced Neural Stem Cell Plasticity and Neural Regeneration in Adult Zebrafish Brain. CURRENT PATHOBIOLOGY REPORTS 2018; 6:71-77. [PMID: 29938129 PMCID: PMC5978899 DOI: 10.1007/s40139-018-0158-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Purpose of the Review The purpose of this study is to review the current knowledge on the damage-induced molecular programs that underlie the regenerative ability in zebrafish brain. Recent Findings Neural stem cells are the reservoir for new neurons during development and regeneration of the vertebrate brains. Pathological conditions such as neurodegenerative diseases hamper neural stem cell plasticity and neurogenic outcome in humans, whereas adult zebrafish brain can enhance proliferation and neurogenic capacity of its neural stem cells despite the incipient pathology. Evidence suggests that zebrafish uses damage-induced molecular programs to enable neural stem cells to efficiently initiate regeneration. Since this aptitude may be harnessed for regenerative therapies in human brain, understanding the molecular programs regulating neural stem cell proliferation and quiescence in zebrafish is of utmost importance for clinical efforts. Summary Specific molecular programs that are different than those in the homeostatic conditions regulate adult zebrafish neural stem cell plasticity and the regenerative capacity after injury and neurodegeneration. These programs can serve as candidates for stem cell-based regenerative therapies in humans.
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Affiliation(s)
- Caghan Kizil
- 1German Centre for Neurodegenerative Diseases (DZNE) Dresden, Helmholtz Association, Arnoldstrasse 18, 01307 Dresden, Germany.,2Center for Regenerative Therapies Dresden (CRTD), TU Dresden, Fetscherstrasse 105, 01307 Dresden, Germany
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215
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Herman PE, Papatheodorou A, Bryant SA, Waterbury CKM, Herdy JR, Arcese AA, Buxbaum JD, Smith JJ, Morgan JR, Bloom O. Highly conserved molecular pathways, including Wnt signaling, promote functional recovery from spinal cord injury in lampreys. Sci Rep 2018; 8:742. [PMID: 29335507 PMCID: PMC5768751 DOI: 10.1038/s41598-017-18757-1] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Accepted: 12/18/2017] [Indexed: 12/23/2022] Open
Abstract
In mammals, spinal cord injury (SCI) leads to dramatic losses in neurons and synaptic connections, and consequently function. Unlike mammals, lampreys are vertebrates that undergo spontaneous regeneration and achieve functional recovery after SCI. Therefore our goal was to determine the complete transcriptional responses that occur after SCI in lampreys and to identify deeply conserved pathways that promote regeneration. We performed RNA-Seq on lamprey spinal cord and brain throughout the course of functional recovery. We describe complex transcriptional responses in the injured spinal cord, and somewhat surprisingly, also in the brain. Transcriptional responses to SCI in lampreys included transcription factor networks that promote peripheral nerve regeneration in mammals such as Atf3 and Jun. Furthermore, a number of highly conserved axon guidance, extracellular matrix, and proliferation genes were also differentially expressed after SCI in lampreys. Strikingly, ~3% of differentially expressed transcripts belonged to the Wnt pathways. These included members of the Wnt and Frizzled gene families, and genes involved in downstream signaling. Pharmacological inhibition of Wnt signaling inhibited functional recovery, confirming a critical role for this pathway. These data indicate that molecular signals present in mammals are also involved in regeneration in lampreys, supporting translational relevance of the model.
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Affiliation(s)
- Paige E Herman
- The Feinstein Institute for Medical Research, Center for Autoimmune and Musculoskeletal Disease, Manhasset, NY, 11030, USA
| | - Angelos Papatheodorou
- The Feinstein Institute for Medical Research, Center for Autoimmune and Musculoskeletal Disease, Manhasset, NY, 11030, USA
| | - Stephanie A Bryant
- University of Kentucky, Department of Biology, Lexington, KY, 40506, USA
| | | | - Joseph R Herdy
- University of Kentucky, Department of Biology, Lexington, KY, 40506, USA
| | - Anthony A Arcese
- The Feinstein Institute for Medical Research, Center for Autoimmune and Musculoskeletal Disease, Manhasset, NY, 11030, USA
| | - Joseph D Buxbaum
- Icahn School of Medicine at Mount Sinai, Department of Psychiatry, New York, NY, 10029, USA
| | - Jeramiah J Smith
- University of Kentucky, Department of Biology, Lexington, KY, 40506, USA
| | - Jennifer R Morgan
- Marine Biological Laboratory, The Eugene Bell Center for Regenerative Biology and Tissue Engineering, Woods Hole, MA, 02543, USA.
| | - Ona Bloom
- The Feinstein Institute for Medical Research, Center for Autoimmune and Musculoskeletal Disease, Manhasset, NY, 11030, USA.
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216
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Genetic Pathways of Neuroregeneration in a Novel Mild Traumatic Brain Injury Model in Adult Zebrafish. eNeuro 2018; 5:eN-NWR-0208-17. [PMID: 29302617 PMCID: PMC5752677 DOI: 10.1523/eneuro.0208-17.2017] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Revised: 12/11/2017] [Accepted: 12/12/2017] [Indexed: 12/21/2022] Open
Abstract
Mild traumatic brain injuries (mTBIs) are one of the most prevalent neurological disorders, and humans are severely limited in their ability to repair and regenerate central nervous system (CNS) tissue postinjury. However, zebrafish (Danio rerio) maintain the remarkable ability to undergo complete and functional neuroregeneration as an adult. We wish to extend knowledge of the known mechanisms of neuroregeneration by analyzing the differentially expressed genes (DEGs) in a novel adult zebrafish model of mTBI. In this study, a rodent weight drop model of mTBI was adapted to the adult zebrafish. A memory test showed significant deficits in spatial memory in the mTBI group. We identified DEGs at 3 and 21 days postinjury (dpi) through RNA-sequencing analysis. The resulting DEGs were categorized according to gene ontology (GO) categories. At 3 dpi, GO categories consisted of peak injury response pathways. Significantly, at 21 dpi, GO categories consisted of neuroregeneration pathways. Ultimately, these results validate a novel zebrafish model of mTBI and elucidate significant DEGs of interest in CNS injury and neuroregeneration.
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217
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Cacialli P, Palladino A, Lucini C. Role of brain-derived neurotrophic factor during the regenerative response after traumatic brain injury in adult zebrafish. Neural Regen Res 2018; 13:941-944. [PMID: 29926814 PMCID: PMC6022468 DOI: 10.4103/1673-5374.233430] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Several mammalian animal models of traumatic brain injury have been used, mostly rodents. However, reparative mechanisms in mammalian brain are very limited, and newly formed neurons do not survive for long time. The brain of adult zebrafish, a teleost fish widely used as vertebrate model, possesses high regenerative properties after injury due to the presence of numerous stem cells niches. The ventricular lining of the zebrafish dorsal telencephalon is the most studied neuronal stem cell niche because its dorso-lateral zone is considered the equivalent to the hippocampus of mammals which contains one of the two constitutive neurogenic niches of mammals. To mimic TBI, stab wound in the dorso-lateral telencephalon of zebrafish was used in studies devoted to fish regenerative properties. Brain-derived neurotrophic factor, which is known to play key roles in the repair process after traumatic brain lesions, persists around the lesioned area of injured telencephalon of adult zebrafish. These results are extensively compared to reparative processes in rodent brain. Considering the complete repair of the damaged area in fish, it could be tempting to consider brain-derived neurotrophic factor as a factor contributing to create a permissive environment that enables the establishment of new neuronal population in damaged brain.
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Affiliation(s)
- Pietro Cacialli
- Department of Veterinary Medicine, University of Naples Federico II, Naples, Italy
| | - Antonio Palladino
- Department of Veterinary Medicine, University of Naples Federico II, Naples, Italy
| | - Carla Lucini
- Department of Veterinary Medicine, University of Naples Federico II, Naples, Italy
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218
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Monteiro S, Salgado AJ, Silva NA. Immunomodulation as a neuroprotective strategy after spinal cord injury. Neural Regen Res 2018; 13:423-424. [PMID: 29623924 PMCID: PMC5900502 DOI: 10.4103/1673-5374.228722] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Affiliation(s)
- Susana Monteiro
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus de Gualtar, Braga; ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - António J Salgado
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus de Gualtar, Braga; ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Nuno A Silva
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus de Gualtar, Braga; ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
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219
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Simkin J, Seifert AW. Concise Review: Translating Regenerative Biology into Clinically Relevant Therapies: Are We on the Right Path? Stem Cells Transl Med 2017; 7:220-231. [PMID: 29271610 PMCID: PMC5788874 DOI: 10.1002/sctm.17-0213] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Accepted: 11/29/2017] [Indexed: 02/06/2023] Open
Abstract
Despite approaches in regenerative medicine using stem cells, bio‐engineered scaffolds, and targeted drug delivery to enhance human tissue repair, clinicians remain unable to regenerate large‐scale, multi‐tissue defects in situ. The study of regenerative biology using mammalian models of complex tissue regeneration offers an opportunity to discover key factors that stimulate a regenerative rather than fibrotic response to injury. For example, although primates and rodents can regenerate their distal digit tips, they heal more proximal amputations with scar tissue. Rabbits and African spiny mice re‐grow tissue to fill large musculoskeletal defects through their ear pinna, while other mammals fail to regenerate identical defects and instead heal ear holes through fibrotic repair. This Review explores the utility of these comparative healing models using the spiny mouse ear pinna and the mouse digit tip to consider how mechanistic insight into reparative regeneration might serve to advance regenerative medicine. Specifically, we consider how inflammation and immunity, extracellular matrix composition, and controlled cell proliferation intersect to establish a pro‐regenerative microenvironment in response to injuries. Understanding how some mammals naturally regenerate complex tissue can provide a blueprint for how we might manipulate the injury microenvironment to enhance regenerative abilities in humans. Stem Cells Translational Medicine2018;7:220–231
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Affiliation(s)
- Jennifer Simkin
- Department of Biology, University of Kentucky, Lexington, Kentucky, USA
| | - Ashley W Seifert
- Department of Biology, University of Kentucky, Lexington, Kentucky, USA
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220
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Hui SP, Sheng DZ, Sugimoto K, Gonzalez-Rajal A, Nakagawa S, Hesselson D, Kikuchi K. Zebrafish Regulatory T Cells Mediate Organ-Specific Regenerative Programs. Dev Cell 2017; 43:659-672.e5. [DOI: 10.1016/j.devcel.2017.11.010] [Citation(s) in RCA: 125] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Revised: 10/20/2017] [Accepted: 11/13/2017] [Indexed: 12/12/2022]
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221
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Successful optic nerve regeneration in the senescent zebrafish despite age-related decline of cell intrinsic and extrinsic response processes. Neurobiol Aging 2017; 60:1-10. [DOI: 10.1016/j.neurobiolaging.2017.08.013] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Revised: 07/18/2017] [Accepted: 08/13/2017] [Indexed: 12/12/2022]
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222
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Li Y, Wan S, Liu G, Cai W, Huo D, Li G, Yang M, Wang Y, Guan G, Ding N, Liu F, Zeng W, Zhu C. Netrin-1 Promotes Inflammation Resolution to Achieve Endothelialization of Small-Diameter Tissue Engineering Blood Vessels by Improving Endothelial Progenitor Cells Function In Situ. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2017; 4:1700278. [PMID: 29270340 PMCID: PMC5738088 DOI: 10.1002/advs.201700278] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Revised: 08/07/2017] [Indexed: 05/05/2023]
Abstract
The transplant of small-diameter tissue engineering blood vessels (small-diameter TEBVs) (<6 mm) in vascular replacement therapy often fails because of early onset thrombosis and long-standing chronic inflammation. The specific inflammation state involved in small-diameter TEBVs transplants remains unclear, and whether promoting inflammation resolution would be useful for small-diameter TEBVs therapy need study. The neural protuberant orientation factor 1 (Netrin-1) is found present in endothelial cells of natural blood vessels and has anti-inflammatory effects. This work generates netrin-1-modified small-diameter TEBVs by using layer-by-layer self-assembly to resolve the inflammation. The results show that netrin-1 reprograms macrophages (MΦ) to assume an anti-inflammatory phenotype and promotes the infiltration and subsequent efflux of MΦ from inflamed sites over time, which improves the local microenvironment and the function of early homing endothelial progenitor cells (EPCs). Small-diameter TEBVs modified by netrin-1 achieve endothelialization after 30 d and retain patency at 14 months. These findings suggest that promoting the resolution of inflammation in time is necessary to induce endothelialization of small-diameter TEBVs and prevent early thrombosis and problems associated with chronic inflammation. Furthermore, this work finds that the MΦ-derived exosomes can target and regulate EPCs, which may serve as a useful treatment for other inflammatory diseases.
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Affiliation(s)
- Yanzhao Li
- Department of AnatomyNational and Regional Engineering Laboratory of Tissue EngineeringState and Local Joint Engineering Laboratory for Vascular ImplantsKey Lab for Biomechanics and Tissue Engineering of ChongqingState Key Laboratory of Trauma, burn and Combined injuryThird Military Medical UniversityChongqing400038China
| | - Simin Wan
- Department of AnatomyNational and Regional Engineering Laboratory of Tissue EngineeringState and Local Joint Engineering Laboratory for Vascular ImplantsKey Lab for Biomechanics and Tissue Engineering of ChongqingState Key Laboratory of Trauma, burn and Combined injuryThird Military Medical UniversityChongqing400038China
| | - Ge Liu
- Department of AnatomyNational and Regional Engineering Laboratory of Tissue EngineeringState and Local Joint Engineering Laboratory for Vascular ImplantsKey Lab for Biomechanics and Tissue Engineering of ChongqingState Key Laboratory of Trauma, burn and Combined injuryThird Military Medical UniversityChongqing400038China
| | - Wang Cai
- Department of AnatomyNational and Regional Engineering Laboratory of Tissue EngineeringState and Local Joint Engineering Laboratory for Vascular ImplantsKey Lab for Biomechanics and Tissue Engineering of ChongqingState Key Laboratory of Trauma, burn and Combined injuryThird Military Medical UniversityChongqing400038China
| | - Da Huo
- Department of AnatomyNational and Regional Engineering Laboratory of Tissue EngineeringState and Local Joint Engineering Laboratory for Vascular ImplantsKey Lab for Biomechanics and Tissue Engineering of ChongqingState Key Laboratory of Trauma, burn and Combined injuryThird Military Medical UniversityChongqing400038China
| | - Gang Li
- Department of AnatomyNational and Regional Engineering Laboratory of Tissue EngineeringState and Local Joint Engineering Laboratory for Vascular ImplantsKey Lab for Biomechanics and Tissue Engineering of ChongqingState Key Laboratory of Trauma, burn and Combined injuryThird Military Medical UniversityChongqing400038China
| | - Mingcan Yang
- Department of AnatomyNational and Regional Engineering Laboratory of Tissue EngineeringState and Local Joint Engineering Laboratory for Vascular ImplantsKey Lab for Biomechanics and Tissue Engineering of ChongqingState Key Laboratory of Trauma, burn and Combined injuryThird Military Medical UniversityChongqing400038China
| | - Yuxin Wang
- Department of AnatomyNational and Regional Engineering Laboratory of Tissue EngineeringState and Local Joint Engineering Laboratory for Vascular ImplantsKey Lab for Biomechanics and Tissue Engineering of ChongqingState Key Laboratory of Trauma, burn and Combined injuryThird Military Medical UniversityChongqing400038China
| | - Ge Guan
- Department of AnatomyNational and Regional Engineering Laboratory of Tissue EngineeringState and Local Joint Engineering Laboratory for Vascular ImplantsKey Lab for Biomechanics and Tissue Engineering of ChongqingState Key Laboratory of Trauma, burn and Combined injuryThird Military Medical UniversityChongqing400038China
| | - Ning Ding
- Department of AnatomyNational and Regional Engineering Laboratory of Tissue EngineeringState and Local Joint Engineering Laboratory for Vascular ImplantsKey Lab for Biomechanics and Tissue Engineering of ChongqingState Key Laboratory of Trauma, burn and Combined injuryThird Military Medical UniversityChongqing400038China
| | - Feila Liu
- Department of AnatomyNational and Regional Engineering Laboratory of Tissue EngineeringState and Local Joint Engineering Laboratory for Vascular ImplantsKey Lab for Biomechanics and Tissue Engineering of ChongqingState Key Laboratory of Trauma, burn and Combined injuryThird Military Medical UniversityChongqing400038China
| | - Wen Zeng
- Department of AnatomyNational and Regional Engineering Laboratory of Tissue EngineeringState and Local Joint Engineering Laboratory for Vascular ImplantsKey Lab for Biomechanics and Tissue Engineering of ChongqingState Key Laboratory of Trauma, burn and Combined injuryThird Military Medical UniversityChongqing400038China
| | - Chuhong Zhu
- Department of AnatomyNational and Regional Engineering Laboratory of Tissue EngineeringState and Local Joint Engineering Laboratory for Vascular ImplantsKey Lab for Biomechanics and Tissue Engineering of ChongqingState Key Laboratory of Trauma, burn and Combined injuryThird Military Medical UniversityChongqing400038China
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223
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Geurtzen K, Vernet A, Freidin A, Rauner M, Hofbauer LC, Schneider JE, Brand M, Knopf F. Immune Suppressive and Bone Inhibitory Effects of Prednisolone in Growing and Regenerating Zebrafish Tissues. J Bone Miner Res 2017; 32:2476-2488. [PMID: 28771888 DOI: 10.1002/jbmr.3231] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 07/19/2017] [Accepted: 07/31/2017] [Indexed: 01/15/2023]
Abstract
Glucocorticoids are widely used as therapeutic agents to treat immune-mediated diseases in humans because of their anti-inflammatory and immunosuppressive effects. However, glucocorticoids have various adverse effects, in particular rapid and pronounced bone loss associated with fractures in glucocorticoid-induced osteoporosis, a common form of secondary osteoporosis. In zebrafish, which are increasingly used to study processes of bone regeneration and disease, glucocorticoids show detrimental effects on bone tissue; however, the underlying cellular mechanisms are incompletely understood. Here, we show that treatment with the glucocorticoid prednisolone impacts on the number, activity and differentiation of osteoblasts, osteoclasts, and immune cells during ontogenetic growth, homeostasis, and regeneration of zebrafish bone. Macrophage numbers are reduced in both larval and adult tissues, correlating with decreased generation of myelomonocytes and enhanced apoptosis of these cells. In contrast, osteoblasts fail to proliferate, show decreased activity, and undergo incomplete differentiation. In addition, prednisolone treatment mitigates the number and recruitment of osteoclasts to sites of bone regeneration in adult fish. In combination, these effects delay bone growth and impair bone regeneration. Our study demonstrates the many-faceted effects of glucocorticoids in non-mammalian vertebrates and helps to further establish the zebrafish as a model to study glucocorticoid-induced osteoporosis. © 2017 American Society for Bone and Mineral Research.
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Affiliation(s)
- Karina Geurtzen
- Center for Regenerative Therapies Dresden (CRTD) and Biotechnology Center, Technische Universität Dresden, Dresden, Germany
| | - Aude Vernet
- Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, UK
| | - Andrew Freidin
- Kennedy Institute of Rheumatology, University of Oxford, Oxford, UK
| | - Martina Rauner
- Division of Endocrinology, Diabetes, and Bone Diseases, Department of Medicine III, Technische Universität Dresden, Dresden, Germany
- Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany
| | - Lorenz C Hofbauer
- Center for Regenerative Therapies Dresden (CRTD) and Biotechnology Center, Technische Universität Dresden, Dresden, Germany
- Division of Endocrinology, Diabetes, and Bone Diseases, Department of Medicine III, Technische Universität Dresden, Dresden, Germany
- Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany
| | - Jürgen E Schneider
- Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, UK
- Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, UK
| | - Michael Brand
- Center for Regenerative Therapies Dresden (CRTD) and Biotechnology Center, Technische Universität Dresden, Dresden, Germany
| | - Franziska Knopf
- Center for Regenerative Therapies Dresden (CRTD) and Biotechnology Center, Technische Universität Dresden, Dresden, Germany
- Kennedy Institute of Rheumatology, University of Oxford, Oxford, UK
- Center for Healthy Aging, Technische Universität Dresden, Dresden, Germany
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224
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Caires HR, Barros da Silva P, Barbosa MA, Almeida CR. A co-culture system with three different primary human cell populations reveals that biomaterials and MSC modulate macrophage-driven fibroblast recruitment. J Tissue Eng Regen Med 2017; 12:e1433-e1440. [PMID: 28865088 DOI: 10.1002/term.2560] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Revised: 06/28/2017] [Accepted: 08/25/2017] [Indexed: 01/24/2023]
Abstract
The biological response to implanted biomaterials is a complex and highly coordinated phenomenon involving many different cell types that interact within 3D microenvironments. Here, we increased the complexity of a 3D platform to include at least 3 cell types that play a role in the host response upon scaffold implantation. With this system, it was possible to address how immune responses triggered by 3D biomaterials mediate recruitment of stromal cells that promote tissue regeneration, mesenchymal stromal/stem cells (MSC), or a foreign body response, fibroblasts. Primary human macrophages yielded the highest fibroblast recruitment when interacting with chitosan scaffolds but not polylactic acid. Interestingly, when there were MSC and fibroblasts in the same environment, macrophages in chitosan scaffolds again promoted a significant increase on fibroblast recruitment, but not of MSC. However, macrophages that were firstly allowed to interact with MSC within the scaffolds were no longer able to recruit fibroblasts. This study illustrates the potential to use different scaffolds to regulate the dynamics of recruitment of proregenerative or fibrotic cell types through immunomodulation. Overall, this work strengths the idea that ex vivo predictive systems need to consider the different players involved in the biological response to biomaterials and that timing of arrival of specific cell types will affect the outcome.
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Affiliation(s)
- Hugo R Caires
- i3S-Instituto de Investigação e Inovação em Saúde da Universidade do Porto, Porto, Portugal.,INEB-Instituto de Engenharia Biomédica, Porto, Portugal.,ICBAS-Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal
| | - Patrícia Barros da Silva
- i3S-Instituto de Investigação e Inovação em Saúde da Universidade do Porto, Porto, Portugal.,INEB-Instituto de Engenharia Biomédica, Porto, Portugal
| | - Mário A Barbosa
- i3S-Instituto de Investigação e Inovação em Saúde da Universidade do Porto, Porto, Portugal.,INEB-Instituto de Engenharia Biomédica, Porto, Portugal.,ICBAS-Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal
| | - Catarina R Almeida
- i3S-Instituto de Investigação e Inovação em Saúde da Universidade do Porto, Porto, Portugal.,INEB-Instituto de Engenharia Biomédica, Porto, Portugal.,Department of Medical Sciences and Institute for Biomedicine-iBiMED, University of Aveiro, Aveiro, Portugal
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225
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IL4/STAT6 Signaling Activates Neural Stem Cell Proliferation and Neurogenesis upon Amyloid-β42 Aggregation in Adult Zebrafish Brain. Cell Rep 2017; 17:941-948. [PMID: 27760324 DOI: 10.1016/j.celrep.2016.09.075] [Citation(s) in RCA: 107] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2015] [Revised: 06/25/2016] [Accepted: 09/22/2016] [Indexed: 12/12/2022] Open
Abstract
Human brains are prone to neurodegeneration, given that endogenous neural stem/progenitor cells (NSPCs) fail to support neurogenesis. To investigate the molecular programs potentially mediating neurodegeneration-induced NSPC plasticity in regenerating organisms, we generated an Amyloid-β42 (Aβ42)-dependent neurotoxic model in adult zebrafish brain through cerebroventricular microinjection of cell-penetrating Aβ42 derivatives. Aβ42 deposits in neurons and causes phenotypes reminiscent of amyloid pathophysiology: apoptosis, microglial activation, synaptic degeneration, and learning deficits. Aβ42 also induces NSPC proliferation and enhanced neurogenesis. Interleukin-4 (IL4) is activated primarily in neurons and microglia/macrophages in response to Aβ42 and is sufficient to increase NSPC proliferation and neurogenesis via STAT6 phosphorylation through the IL4 receptor in NSPCs. Our results reveal a crosstalk between neurons and immune cells mediated by IL4/STAT6 signaling, which induces NSPC plasticity in zebrafish brains.
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226
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Katz S, Cussigh D, Urbán N, Blomfield I, Guillemot F, Bally-Cuif L, Coolen M. A Nuclear Role for miR-9 and Argonaute Proteins in Balancing Quiescent and Activated Neural Stem Cell States. Cell Rep 2017; 17:1383-1398. [PMID: 27783951 PMCID: PMC5098119 DOI: 10.1016/j.celrep.2016.09.088] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 07/07/2016] [Accepted: 09/26/2016] [Indexed: 01/08/2023] Open
Abstract
Throughout life, adult neural stem cells (NSCs) produce new neurons and glia that contribute to crucial brain functions. Quiescence is an essential protective feature of adult NSCs; however, the establishment and maintenance of this state remain poorly understood. We demonstrate that in the adult zebrafish pallium, the brain-enriched miR-9 is expressed exclusively in a subset of quiescent NSCs, highlighting a heterogeneity within these cells, and is necessary to maintain NSC quiescence. Strikingly, miR-9, along with Argonaute proteins (Agos), is localized to the nucleus of quiescent NSCs, and manipulating their nuclear/cytoplasmic ratio impacts quiescence. Mechanistically, miR-9 permits efficient Notch signaling to promote quiescence, and we identify the RISC protein TNRC6 as a mediator of miR-9/Agos nuclear localization in vivo. We propose a conserved non-canonical role for nuclear miR-9/Agos in controlling the balance between NSC quiescence and activation, a key step in maintaining adult germinal pools.
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Affiliation(s)
- Shauna Katz
- Zebrafish Neurogenetics Group, Paris-Saclay Institute of Neuroscience (Neuro-PSI), UMR 9197, CNRS-University Paris-Sud, Avenue de la Terrasse, 91190 Gif-sur-Yvette, France
| | - Delphine Cussigh
- Zebrafish Neurogenetics Group, Paris-Saclay Institute of Neuroscience (Neuro-PSI), UMR 9197, CNRS-University Paris-Sud, Avenue de la Terrasse, 91190 Gif-sur-Yvette, France; Department of Developmental and Stem Cell Biology, Institut Pasteur and CNRS UMR 3738, 25 rue du Dr Roux, 75015 Paris, France
| | - Noelia Urbán
- Mill Hill Laboratory, The Francis Crick Institute, The Ridgeway, Mill Hill, London NW7 1AA, UK
| | - Isabelle Blomfield
- Mill Hill Laboratory, The Francis Crick Institute, The Ridgeway, Mill Hill, London NW7 1AA, UK
| | - François Guillemot
- Mill Hill Laboratory, The Francis Crick Institute, The Ridgeway, Mill Hill, London NW7 1AA, UK
| | - Laure Bally-Cuif
- Zebrafish Neurogenetics Group, Paris-Saclay Institute of Neuroscience (Neuro-PSI), UMR 9197, CNRS-University Paris-Sud, Avenue de la Terrasse, 91190 Gif-sur-Yvette, France; Department of Developmental and Stem Cell Biology, Institut Pasteur and CNRS UMR 3738, 25 rue du Dr Roux, 75015 Paris, France.
| | - Marion Coolen
- Zebrafish Neurogenetics Group, Paris-Saclay Institute of Neuroscience (Neuro-PSI), UMR 9197, CNRS-University Paris-Sud, Avenue de la Terrasse, 91190 Gif-sur-Yvette, France; Department of Developmental and Stem Cell Biology, Institut Pasteur and CNRS UMR 3738, 25 rue du Dr Roux, 75015 Paris, France.
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227
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Da Fonte DF, Martyniuk CJ, Xing L, Pelin A, Corradi N, Hu W, Trudeau VL. Secretoneurin A regulates neurogenic and inflammatory transcriptional networks in goldfish (Carassius auratus) radial glia. Sci Rep 2017; 7:14930. [PMID: 29097753 PMCID: PMC5668316 DOI: 10.1038/s41598-017-14930-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Accepted: 10/18/2017] [Indexed: 12/27/2022] Open
Abstract
Radial glial cells (RGCs) are the most abundant macroglia in the teleost brain and have established roles in neurogenesis and neurosteroidogenesis; however, their transcriptome remains uncharacterized, which limits functional understanding of this important cell type. Using cultured goldfish RGCs, RNA sequencing and de novo transcriptome assembly were performed, generating the first reference transcriptome for fish RGCs with 17,620 unique genes identified. These data revealed that RGCs express a diverse repertoire of receptors and signaling molecules, suggesting that RGCs may respond to and synthesize an array of hormones, peptides, cytokines, and growth factors. Building upon neuroanatomical data and studies investigating direct neuronal regulation of RGC physiology, differential gene expression analysis was conducted to identify transcriptional networks that are responsive to the conserved secretogranin II-derived neuropeptide secretoneurin A (SNa). Pathway analysis of the transcriptome indicated that cellular processes related to the central nervous system (e.g., neurogenesis, synaptic plasticity, glial cell development) and immune functions (e.g., immune system activation, leukocyte function, macrophage response) were preferentially modulated by SNa. These data reveal an array of new functions that are proposed to be critical to neuronal-glial interactions through the mediator SNa.
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Affiliation(s)
- Dillon F Da Fonte
- Department of Biology, University of Ottawa, Ontario, K1N 6N5, Canada
| | - Christopher J Martyniuk
- Department of Physiological Sciences and Center for Environmental and Human Toxicology, University of Florida Genetics Institute, Interdisciplinary Program in Biomedical Sciences Neuroscience, College of Veterinary Medicine, University of Florida, Gainesville, FL, 32611, USA
| | - Lei Xing
- Department of Biology, University of Ottawa, Ontario, K1N 6N5, Canada.,Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, 01307, Germany
| | - Adrian Pelin
- Department of Biology, University of Ottawa, Ontario, K1N 6N5, Canada
| | - Nicolas Corradi
- Department of Biology, University of Ottawa, Ontario, K1N 6N5, Canada
| | - Wei Hu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
| | - Vance L Trudeau
- Department of Biology, University of Ottawa, Ontario, K1N 6N5, Canada.
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228
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Tang MM, Lin WJ, Zhang JT, Zhao YW, Li YC. Exogenous FGF2 reverses depressive-like behaviors and restores the suppressed FGF2-ERK1/2 signaling and the impaired hippocampal neurogenesis induced by neuroinflammation. Brain Behav Immun 2017; 66:322-331. [PMID: 28529071 DOI: 10.1016/j.bbi.2017.05.013] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Revised: 05/10/2017] [Accepted: 05/17/2017] [Indexed: 01/03/2023] Open
Abstract
Our previous work demonstrated that neuroinflammation evoked by triple repeated central LPS challenges inhibited adult hippocampal neurogenesis that were correlated with the depressive-like behavioral symptoms induced by neuroinflammation. These findings suggest that hippocampal neurogenesis might be one of biological mechanisms underlying depression induced by neuroinflammation and targeting neurogenesis might lead to new therapeutic strategies for the treatment of depression. In this study, we manipulated adult hippocampal neurogenesis using fibroblast growth factor 2 (FGF2), one crucial molecule modulating cell proliferation and survival in central nervous system, and investigate the involvement and the potential therapeutic effects of FGF2 on neuroinflammation-induced depression. Central lipopolysaccharides (LPS) challenges were used as previously to evoke the neuroinflammatory state in the brain of rat. Exogenous FGF2 was infused into lateral ventricle during the neuroinflammatory state. It was found that the protein expression of FGF2 in hippocampus was inhibited by neuroinflammation. The activation of extracellular signal-regulated kinase (ERK), the downstream molecule of FGF2, was also inhibited by neuroinflammation. Exogenous FGF2 infusions prevented the decrease in phosphorylation of ERK1/2 under neuroinflammation state. Exogenous FGF2 reversed depressive-like behaviors and the impaired hippocampal neurogenesis induced by neuroinflammation. These findings provide evidence that the FGF2-ERK1/2 pathway is involved in the pathophysiology of depressive-like behaviors, and manipulating the neurogenesis pathway is a viable therapeutic approach to inflammation-associated depression.
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Affiliation(s)
- Ming-Ming Tang
- CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing, China
| | - Wen-Juan Lin
- CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing, China; Brain-Behavior Research Center, Institute of Psychology, Chinese Academy of Sciences, Beijing 100101, China.
| | - Jun-Tao Zhang
- CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing, China
| | - Ya-Wei Zhao
- CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing, China
| | - Ying-Cong Li
- CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing 100101, China
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229
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On phagocytes and macular degeneration. Prog Retin Eye Res 2017; 61:98-128. [DOI: 10.1016/j.preteyeres.2017.06.002] [Citation(s) in RCA: 96] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 05/29/2017] [Accepted: 06/05/2017] [Indexed: 12/17/2022]
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230
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Bhattarai P, Thomas AK, Cosacak MI, Papadimitriou C, Mashkaryan V, Zhang Y, Kizil C. Modeling Amyloid-β42 Toxicity and Neurodegeneration in Adult Zebrafish Brain. J Vis Exp 2017. [PMID: 29155703 DOI: 10.3791/56014] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Alzheimer's disease (AD) is a debilitating neurodegenerative disease in which accumulation of toxic amyloid-β42 (Aβ42) peptides leads to synaptic degeneration, inflammation, neuronal death, and learning deficits. Humans cannot regenerate lost neurons in the case of AD in part due to impaired proliferative capacity of the neural stem/progenitor cells (NSPCs) and reduced neurogenesis. Therefore, efficient regenerative therapies should also enhance the proliferation and neurogenic capacity of NSPCs. Zebrafish (Danio rerio) is a regenerative organism, and we can learn the basic molecular programs with which we could design therapeutic approaches to tackle AD. For this reason, the generation of an AD-like model in zebrafish was necessary. Using our methodology, we can introduce synthetic derivatives of Aβ42 peptide with tissue penetrating capability into the adult zebrafish brain, and analyze the disease pathology and the regenerative response. The advantage over the existing methods or animal models is that zebrafish can teach us how a vertebrate brain can naturally regenerate, and thus help us to treat human neurodegenerative diseases better by targeting endogenous NSPCs. Therefore, the amyloid-toxicity model established in the adult zebrafish brain may open new avenues for research in the field of neuroscience and clinical medicine. Additionally, the simple execution of this method allows for cost-effective and efficient experimental assessment. This manuscript describes the synthesis and injection of Aβ42 peptides into zebrafish brain.
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Affiliation(s)
- Prabesh Bhattarai
- German Centre for Neurodegenerative Diseases (DZNE) Dresden within Helmholtz Association
| | | | - Mehmet Ilyas Cosacak
- German Centre for Neurodegenerative Diseases (DZNE) Dresden within Helmholtz Association
| | - Christos Papadimitriou
- German Centre for Neurodegenerative Diseases (DZNE) Dresden within Helmholtz Association
| | | | - Yixin Zhang
- B CUBE, Center for Molecular Bioengineering, Technische Universität Dresden
| | - Caghan Kizil
- German Centre for Neurodegenerative Diseases (DZNE) Dresden within Helmholtz Association; Center for Regenerative Therapies Dresden (CRTD), TU Dresden;
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231
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Cosacak MI, Bhattarai P, Bocova L, Dzewas T, Mashkaryan V, Papadimitriou C, Brandt K, Hollak H, Antos CL, Kizil C. Human TAU P301L overexpression results in TAU hyperphosphorylation without neurofibrillary tangles in adult zebrafish brain. Sci Rep 2017; 7:12959. [PMID: 29021554 PMCID: PMC5636889 DOI: 10.1038/s41598-017-13311-5] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Accepted: 09/20/2017] [Indexed: 11/09/2022] Open
Abstract
Microtubule-associated TAU protein is a pathological hallmark in Alzheimer's disease (AD), where hyperphosphorylation of TAU generates neurofibrillary tangles. To investigate the effects of TAU in a regenerative adult vertebrate brain system, we generated a cre/lox-based transgenic model of zebrafish that chronically expresses human TAUP301L, which is a variant of human TAU protein that forms neurofibrillary tangles in mouse models and humans. Interestingly, we found that although chronic and abundant expression of TAUP301L starting from early embryonic development led to hyperphosphorylation, TAUP301L did not form oligomers and neurofibrillary tangles, and did not cause elevated apoptosis and microglial activation, which are classical symptoms of tauopathies in mammals. Additionally, TAUP301L neither increased neural stem cell proliferation nor activated the expression of regenerative factor Interleukin-4, indicating that TAUP301L toxicity is prevented in the adult zebrafish brain. By combining TAUP301L expression with our established Aβ42 toxicity model, we found that Aβ42 ceases to initiate neurofibrillary tangle formation by TAUP301L, and TAUP301L does not exacerbate the toxicity of Aβ42. Therefore, our results propose a cellular mechanism that protects the adult zebrafish brain against tauopathies, and our model can be used to understand how TAU toxicity can be prevented in humans.
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Affiliation(s)
- Mehmet I Cosacak
- German Center for Neurodegenerative Diseases (DZNE), Arnoldstrasse 18, 01307, Dresden, Germany
| | - Prabesh Bhattarai
- German Center for Neurodegenerative Diseases (DZNE), Arnoldstrasse 18, 01307, Dresden, Germany
| | - Ledio Bocova
- German Center for Neurodegenerative Diseases (DZNE), Arnoldstrasse 18, 01307, Dresden, Germany
| | - Tim Dzewas
- German Center for Neurodegenerative Diseases (DZNE), Arnoldstrasse 18, 01307, Dresden, Germany
| | - Violeta Mashkaryan
- German Center for Neurodegenerative Diseases (DZNE), Arnoldstrasse 18, 01307, Dresden, Germany
- Center for Regenerative Therapies Dresden (CRTD), TU Dresden, Fetscherstrasse 105, 01307, Dresden, Germany
| | - Christos Papadimitriou
- German Center for Neurodegenerative Diseases (DZNE), Arnoldstrasse 18, 01307, Dresden, Germany
| | - Kerstin Brandt
- German Center for Neurodegenerative Diseases (DZNE), Arnoldstrasse 18, 01307, Dresden, Germany
| | - Heike Hollak
- German Center for Neurodegenerative Diseases (DZNE), Arnoldstrasse 18, 01307, Dresden, Germany
| | - Christopher L Antos
- School of Life Sciences and Technology, ShanghaiTech University, 100 Haike Road, Shanghai, China
| | - Caghan Kizil
- German Center for Neurodegenerative Diseases (DZNE), Arnoldstrasse 18, 01307, Dresden, Germany.
- Center for Regenerative Therapies Dresden (CRTD), TU Dresden, Fetscherstrasse 105, 01307, Dresden, Germany.
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232
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Transflammation: Innate immune signaling in nuclear reprogramming. Adv Drug Deliv Rev 2017; 120:133-141. [PMID: 28916494 DOI: 10.1016/j.addr.2017.09.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Revised: 08/31/2017] [Accepted: 09/07/2017] [Indexed: 12/23/2022]
Abstract
Induction of pluripotency in somatic cells by retroviral overexpression of four transcription factors has revolutionized the field of stem cell biology and regenerative medicine. The efficient induction of pluripotency requires the activation of innate immune signaling in a process termed "transflammation" (Lee et al., 2012). Specifically, the stimulation of pattern recognition receptors (PRRs) causes global alterations in the expression and activity of epigenetic modifiers to favor an open chromatin configuration. Activation of toll-like receptors (TLR) or RIG-1-like receptors (RLR) (Sayed et al. 2017) trigger signaling cascades that result in NFκB or IRF-3 mediated changes in epigenetic plasticity that facilitate reprogramming. Another form of nuclear reprogramming is so-called direct reprogramming or transdifferentiation of one somatic cell to another lineage. We have shown that transdifferentiation of human fibroblasts to endothelial cells also involves transflammation (Sayed et al., 2015). Recently, we also identified reactive oxygen species (ROS) (Zhou et al. 2016) and reactive nitrogen species (RNS) (Meng et al., 2016) as mediators of innate immune signaling in nuclear reprogramming. Innate immune signaling plays a key role in nuclear reprogramming by regulating DNA accessibility (Fig. 1). Here, we review recent progress of innate immunity signaling in nuclear reprogramming and epigenetic plasticity.
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233
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González-Rosa JM, Burns CE, Burns CG. Zebrafish heart regeneration: 15 years of discoveries. ACTA ACUST UNITED AC 2017; 4:105-123. [PMID: 28979788 PMCID: PMC5617908 DOI: 10.1002/reg2.83] [Citation(s) in RCA: 116] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Revised: 08/09/2017] [Accepted: 08/09/2017] [Indexed: 12/12/2022]
Abstract
Cardiovascular disease is the leading cause of death worldwide. Compared to other organs such as the liver, the adult human heart lacks the capacity to regenerate on a macroscopic scale after injury. As a result, myocardial infarctions are responsible for approximately half of all cardiovascular related deaths. In contrast, the zebrafish heart regenerates efficiently upon injury through robust myocardial proliferation. Therefore, deciphering the mechanisms that underlie the zebrafish heart's endogenous regenerative capacity represents an exciting avenue to identify novel therapeutic strategies for inducing regeneration of the human heart. This review provides a historical overview of adult zebrafish heart regeneration. We summarize 15 years of research, with a special focus on recent developments from this fascinating field. We discuss experimental findings that address fundamental questions of regeneration research. What is the origin of regenerated muscle? How is regeneration controlled from a genetic and molecular perspective? How do different cell types interact to achieve organ regeneration? Understanding natural models of heart regeneration will bring us closer to answering the ultimate question: how can we stimulate myocardial regeneration in humans?
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Affiliation(s)
- Juan Manuel González-Rosa
- Cardiovascular Research Center Massachusetts General Hospital Charlestown MA 02129 USA.,Harvard Medical School Boston MA 02115 USA
| | - Caroline E Burns
- Cardiovascular Research Center Massachusetts General Hospital Charlestown MA 02129 USA.,Harvard Medical School Boston MA 02115 USA.,Harvard Stem Cell Institute Cambridge MA 02138 USA
| | - C Geoffrey Burns
- Cardiovascular Research Center Massachusetts General Hospital Charlestown MA 02129 USA.,Harvard Medical School Boston MA 02115 USA
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234
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Weber LJ, Marcy HK, Shen YC, Tomkovich SE, Brooks KM, Hilk KE, Barald KF. The role of jab1, a putative downstream effector of the neurotrophic cytokine macrophage migration inhibitory factor (MIF) in zebrafish inner ear hair cell development. Exp Neurol 2017; 301:100-109. [PMID: 28928022 DOI: 10.1016/j.expneurol.2017.09.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 09/05/2017] [Accepted: 09/12/2017] [Indexed: 01/12/2023]
Abstract
Macrophage migration inhibitory factor (MIF) is a neurotrophic cytokine essential for inner ear hair cell (HC) development and statoacoustic ganglion (SAG) neurite outgrowth, and SAG survival in mouse, chick and zebrafish. Another neurotrophic cytokine, Monocyte chemoattractant protein 1 (MCP1) is known to synergize with MIF; but MCP1 alone is insufficient to support mouse/chick SAG neurite outgrowth or neuronal survival. Because of the relatively short time over which the zebrafish inner ear develops (~30hpf), the living zebrafish embryo is an ideal system to examine mif and mcp1 cytokine pathways and interactions. We used a novel technique: direct delivery of antisense oligonucleotide morpholinos (MOs) into the embryonic zebrafish otocyst to discover downstream effectors of mif as well as to clarify the relationship between mif and mcp1 in inner ear development. MOs for mif, mcp1 and the presumptive mif and mcp1 effector, c-Jun activation domain-binding protein-1 (jab1), were injected and then electroporated into the zebrafish otocyst 25-48hours post fertilization (hpf). We found that although mif is important at early stages (before 30hpf) for auditory macular HC development, jab1 is more critical for vestibular macular HC development before 30hpf. After 30hpf, mcp1 becomes important for HC development in both maculae.
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Affiliation(s)
- Loren J Weber
- Department of Cell and Developmental Biology, University of Michigan Medical School, 3728 BSRB, 109 Zina Pitcher Place, Ann Arbor, MI 48109-2200, USA.
| | - Hannah K Marcy
- Department of Cell and Developmental Biology, University of Michigan Medical School, 3728 BSRB, 109 Zina Pitcher Place, Ann Arbor, MI 48109-2200, USA; Undergraduate Research Opportunity Program, 1190 Undergraduate Science Building, 204 Washtenaw Avenue, Ann Arbor, MI 48109-2215, USA.
| | - Yu-Chi Shen
- Department of Cell and Developmental Biology, University of Michigan Medical School, 3728 BSRB, 109 Zina Pitcher Place, Ann Arbor, MI 48109-2200, USA.
| | - Sarah E Tomkovich
- Department of Cell and Developmental Biology, University of Michigan Medical School, 3728 BSRB, 109 Zina Pitcher Place, Ann Arbor, MI 48109-2200, USA; Undergraduate Research Opportunity Program, 1190 Undergraduate Science Building, 204 Washtenaw Avenue, Ann Arbor, MI 48109-2215, USA.
| | - Kristina M Brooks
- Department of Cell and Developmental Biology, University of Michigan Medical School, 3728 BSRB, 109 Zina Pitcher Place, Ann Arbor, MI 48109-2200, USA.
| | - Kelly E Hilk
- Department of Cell and Developmental Biology, University of Michigan Medical School, 3728 BSRB, 109 Zina Pitcher Place, Ann Arbor, MI 48109-2200, USA; Undergraduate Research Opportunity Program, 1190 Undergraduate Science Building, 204 Washtenaw Avenue, Ann Arbor, MI 48109-2215, USA.
| | - Kate F Barald
- Department of Cell and Developmental Biology, University of Michigan Medical School, 3728 BSRB, 109 Zina Pitcher Place, Ann Arbor, MI 48109-2200, USA; Cellular and Molecular Biology Graduate Program, University of Michigan Medical School, Ann Arbor, MI 48109-0619, USA; Department of Biomedical Engineering, College of Engineering, 2200 Bonisteel Boulevard, University of Michigan, Ann Arbor, MI 48109-2099, USA.
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235
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Liu C, Himmati F, Sayed N. Paying the Toll in Nuclear Reprogramming. Front Cell Dev Biol 2017; 5:70. [PMID: 28861413 PMCID: PMC5562677 DOI: 10.3389/fcell.2017.00070] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Accepted: 07/31/2017] [Indexed: 01/07/2023] Open
Abstract
The ability to reverse lineage-committed cells toward pluripotent stem cells or to another cell type is one of the ultimate goals in regenerative medicine. We recently discovered that activation of innate immunity, through Toll-like receptor 3, is required during this conversion of cell fate by causing global changes in the expression and activity of epigenetic modifiers. Here we discuss, in a comprehensive manner, the recent studies on the role of innate immunity in nuclear reprogramming and transdifferentiation, the underlying mechanisms, and its role in regenerative medicine.
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Affiliation(s)
- Chun Liu
- Stanford Cardiovascular Institute, Stanford University School of MedicineStanford, CA, United States.,Department of Medicine, Stanford University School of MedicineStanford, CA, United States
| | - Farhan Himmati
- Stanford Cardiovascular Institute, Stanford University School of MedicineStanford, CA, United States
| | - Nazish Sayed
- Stanford Cardiovascular Institute, Stanford University School of MedicineStanford, CA, United States.,Department of Medicine, Stanford University School of MedicineStanford, CA, United States
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236
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Interfering with the Chronic Immune Response Rescues Chronic Degeneration After Traumatic Brain Injury. J Neurosci 2017; 36:9962-75. [PMID: 27656033 DOI: 10.1523/jneurosci.1898-15.2016] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2015] [Accepted: 08/11/2016] [Indexed: 11/21/2022] Open
Abstract
UNLABELLED After traumatic brain injury (TBI), neurons surviving the initial insult can undergo chronic (secondary) degeneration via poorly understood mechanisms, resulting in long-term cognitive impairment. Although a neuroinflammatory response is promptly activated after TBI, it is unknown whether it has a significant role in chronic phases of TBI (>1 year after injury). Using a closed-head injury model of TBI in mice, we showed by MRI scans that TBI caused substantial degeneration at the lesion site within a few weeks and these did not expand significantly thereafter. However, chronic alterations in neurons were observed, with reduced dendritic spine density lasting >1 year after injury. In parallel, we found a long-lasting inflammatory response throughout the entire brain. Deletion of one allele of CX3CR1, a chemokine receptor, limited infiltration of peripheral immune cells and largely prevented the chronic degeneration of the injured brain and provided a better functional recovery in female, but not male, mice. Therefore, targeting persistent neuroinflammation presents a new therapeutic option to reduce chronic neurodegeneration. SIGNIFICANCE STATEMENT Traumatic brain injury (TBI) often causes chronic neurological problems including epilepsy, neuropsychiatric disorders, and dementia through unknown mechanisms. Our study demonstrates that inflammatory cells invading the brain lead to secondary brain damage. Sex-specific amelioration of chronic neuroinflammation rescues the brain degeneration and results in improved motor functions. Therefore, this study pinpoints an effective therapeutic approach to preventing secondary complications after TBI.
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237
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Cahill TJ, Choudhury RP, Riley PR. Heart regeneration and repair after myocardial infarction: translational opportunities for novel therapeutics. Nat Rev Drug Discov 2017; 16:699-717. [DOI: 10.1038/nrd.2017.106] [Citation(s) in RCA: 182] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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238
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Acute inflammation regulates neuroregeneration through the NF-κB pathway in olfactory epithelium. Proc Natl Acad Sci U S A 2017; 114:8089-8094. [PMID: 28696292 DOI: 10.1073/pnas.1620664114] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Adult neural stem cells/progenitor cells residing in the basal layer of the olfactory epithelium are capable of reconstituting the neuroepithelium even after severe damage. The molecular events underlying this regenerative capacity remain elusive. Here we show that the repair of neuroepithelium after lesioning is accompanied by an acute, but self-limited, inflammatory process. Attenuation of inflammatory cell recruitment and cytokine production by dexamethasone impairs proliferation of progenitor horizontal basal cells (HBCs) and subsequent neuronal differentiation. Using TNF-α receptor-deficient mice, we identify TNF-α signaling as an important contributor to this inflammatory and reparative process, mainly through TNF-α receptor 1. HBC-selective genetic ablation of RelA (p65), the transcriptional activator of the NF-κB pathway, retards inflammation and impedes proliferation at the early stages of regeneration and suggests HBCs directly participate in cross-talk between immune response and neurogenesis. Loss of RelA in the regenerating neuroepithelium perturbs the homeostasis between proliferation and apoptosis while enhancing JNK signaling. Together, our results support a model in which acute inflammation after injury initiates important regenerative signals in part through NF-κB-mediated signaling that activates neural stem cells to reconstitute the olfactory epithelium.
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239
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Zhao Y, Wang Y, Gong J, Yang L, Niu C, Ni X, Wang Y, Peng S, Gu X, Sun C, Yang Y. Chitosan degradation products facilitate peripheral nerve regeneration by improving macrophage-constructed microenvironments. Biomaterials 2017; 134:64-77. [DOI: 10.1016/j.biomaterials.2017.02.026] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Revised: 02/20/2017] [Accepted: 02/21/2017] [Indexed: 10/20/2022]
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240
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Abstract
During brain development, highly complex and interconnected neural circuits are established. This intricate wiring needs to be robust to faithfully perform adult brain function throughout life, but at the same time offer room for plasticity to integrate new information. In the mammalian brain, adult-born neurons are produced in restricted niches harboring neural stem cells. In the fruit fly Drosophila, low-level adult neurogenesis arising from a dispersed population of neural progenitors has recently been detected in the optic lobes. Strikingly, these normally quiescent neural stem cells proliferate upon brain injury and produce new neurons for brain regeneration. Here, we review adult neurogenesis in crustaceans and insects and highlight that neurogenesis in the visual system is prominent in arthropods, but its role and underlying mechanisms are unclear. Moreover, we discuss how the study of damage-responsive progenitor cells in Drosophila may help to understand robust regenerative neurogenesis and open new avenues to enhance brain repair after injury or stroke in humans.
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241
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Cardoso AL, Bachion MM, Morais JDM, Fantinati MS, Almeida VLLD, Lino RS. Adipose tissue stromal vascular fraction in the treatment of full thickness burns in rats. Acta Cir Bras 2017; 31:578-585. [PMID: 27737342 DOI: 10.1590/s0102-865020160090000002] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2016] [Accepted: 08/18/2016] [Indexed: 01/23/2023] Open
Abstract
PURPOSE: To analyze the healing effects of stromal vascular fraction (SVF) application compared to wound dressing with 2% silver sulfadiazine in full thickness burn wounds in rats. METHODS: Animals were divided into two groups: 2% silver sulfadiazine group and SVF group. Both groups received occlusive bandages while the first one was treated with 2% silver sulfadiazine and the latter was treated with injections of SVF prepared from adipose tissue extracted from an animal donor. The animals were accompanied through 3, 7 and 30 days for evaluation of macroscopic, microscopic and morphometric aspects. RESULTS: On day three, a significant increase (p<0.05) of infiltration of polymorphonuclear, fibrin formation and fibroblasts migration in SVF group was observed. On the 7th day the mononuclear infiltrate, angiogenesis, collagen and fibroblasts were significantly increased in the SVF group (p<0.05). At 30 days significantly increased collagen deposition was observed in the SVF group (p<0.05) . CONCLUSION: Adipose tissue derived stromal vascular fraction injections promotes better wound repair than 2% silver sulfadiazine in the treatment of full thickness burn in rats during the evaluated experimental period.
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Affiliation(s)
- Alexandre Lamaro Cardoso
- Fellow Master degree, Faculty of Medicine, Universidade Federal de Goiás (UFG), Goiania-GO, Brazil. Intellectual and scientific content of the study, conception and design of the study, manuscript writing
| | - Maria Márcia Bachion
- PhD, Full Professor, Faculty of Nursing UFG, Goiania-GO, Brazil. Acquisition, analysis and interpretation of data
| | - Júlia de Miranda Morais
- PhD, Associate Professor, Faculty of Medicine, UFG, Goiania-GO, Brazil. Acquisition, analysis and interpretation of data
| | - Marcelo Silva Fantinati
- PhD, Full Professor, ESEFFEGO, Universidade Estadual de Goiás (UEG), Goiania-GO, Brazil. Acquisition, analysis and interpretation of data
| | - Vera Lúcia Lima de Almeida
- Biomedic, Institute of Tropical Pathology and Public Health, Experimental Pathology Laboratory, UFG, Goiania-GO, Brazil. Acquisition of data
| | - Ruy Souza Lino
- PhD, Associate Professor, Institute of Tropical Pathology and Public Health, Experimental Pathology Laboratory, UFG, Goiania-GO, Brazil. Scientific and intellectual content of the study, analysis and interpretation of data, statistical analysis, manuscript preparation
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242
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Sifuentes CJ, Kim JW, Swaroop A, Raymond PA. Rapid, Dynamic Activation of Müller Glial Stem Cell Responses in Zebrafish. Invest Ophthalmol Vis Sci 2017; 57:5148-5160. [PMID: 27699411 PMCID: PMC5054728 DOI: 10.1167/iovs.16-19973] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Purpose Zebrafish neurons regenerate from Müller glia following retinal lesions. Genes and signaling pathways important for retinal regeneration in zebrafish have been described, but our understanding of how Müller glial stem cell properties are regulated is incomplete. Mammalian Müller glia possess a latent neurogenic capacity that might be enhanced in regenerative therapies to treat degenerative retinal diseases. Methods To identify transcriptional changes associated with stem cell properties in zebrafish Müller glia, we performed a comparative transcriptome analysis from isolated cells at 8 and 16 hours following an acute photic lesion, prior to the asymmetric division that produces retinal progenitors. Results We report a rapid, dynamic response of zebrafish Müller glia, characterized by activation of pathways related to stress, nuclear factor–κB (NF-κB) signaling, cytokine signaling, immunity, prostaglandin metabolism, circadian rhythm, and pluripotency, and an initial repression of Wnt signaling. When we compared publicly available transcriptomes of isolated mouse Müller glia from two retinal degeneration models, we found that mouse Müller glia showed evidence of oxidative stress, variable responses associated with immune regulation, and repression of pathways associated with pluripotency, development, and proliferation. Conclusions Categories of biological processes/pathways activated following photoreceptor loss in regeneration-competent zebrafish Müller glia, which distinguished them from mouse Müller glia in retinal degeneration models, included cytokine signaling (notably NF-κB), prostaglandin E2 synthesis, expression of core clock genes, and pathways/metabolic states associated with pluripotency. These regulatory mechanisms are relatively unexplored as potential mediators of stem cell properties likely to be important in Müller glial cells for successful retinal regeneration.
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Affiliation(s)
- Christopher J Sifuentes
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, Michigan, United States
| | - Jung-Woong Kim
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul, Korea 3Neurobiology-Neurodegeneration and Repair Laboratory, National Eye Institute, National Institutes of Health, Bethesda, Maryland, United States
| | - Anand Swaroop
- Neurobiology-Neurodegeneration and Repair Laboratory, National Eye Institute, National Institutes of Health, Bethesda, Maryland, United States
| | - Pamela A Raymond
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, Michigan, United States
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243
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Ottoboni L, Merlini A, Martino G. Neural Stem Cell Plasticity: Advantages in Therapy for the Injured Central Nervous System. Front Cell Dev Biol 2017; 5:52. [PMID: 28553634 PMCID: PMC5427132 DOI: 10.3389/fcell.2017.00052] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Accepted: 04/25/2017] [Indexed: 12/14/2022] Open
Abstract
The physiological and pathological properties of the neural germinal stem cell niche have been well-studied in the past 30 years, mainly in animals and within given limits in humans, and knowledge is available for the cyto-architectonic structure, the cellular components, the timing of development and the energetic maintenance of the niche, as well as for the therapeutic potential and the cross talk between neural and immune cells. In recent years we have gained detailed understanding of the potentiality of neural stem cells (NSCs), although we are only beginning to understand their molecular, metabolic, and epigenetic profile in physiopathology and, further, more can be invested to measure quantitatively the activity of those cells, to model in vitro their therapeutic responses or to predict interactions in silico. Information in this direction has been put forward for other organs but is still limited in the complex and very less accessible context of the brain. A comprehensive understanding of the behavior of endogenous NSCs will help to tune or model them toward a desired response in order to treat complex neurodegenerative diseases. NSCs have the ability to modulate multiple cellular functions and exploiting their plasticity might make them into potent and versatile cellular drugs.
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Affiliation(s)
- Linda Ottoboni
- Neuroimmunology Unit, Division of Neuroscience, Institute of Experimental Neurology, San Raffaele Scientific InstituteMilan, Italy
| | - Arianna Merlini
- Neuroimmunology Unit, Division of Neuroscience, Institute of Experimental Neurology, San Raffaele Scientific InstituteMilan, Italy
| | - Gianvito Martino
- Neuroimmunology Unit, Division of Neuroscience, Institute of Experimental Neurology, San Raffaele Scientific InstituteMilan, Italy
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244
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Cysteinyl Leukotrienes as Potential Pharmacological Targets for Cerebral Diseases. Mediators Inflamm 2017; 2017:3454212. [PMID: 28607533 PMCID: PMC5451784 DOI: 10.1155/2017/3454212] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Revised: 04/10/2017] [Accepted: 04/19/2017] [Indexed: 02/06/2023] Open
Abstract
Cysteinyl leukotrienes (CysLTs) are potent lipid mediators widely known for their actions in asthma and in allergic rhinitis. Accumulating data highlights their involvement in a broader range of inflammation-associated diseases such as cancer, atopic dermatitis, rheumatoid arthritis, and cardiovascular diseases. The reported elevated levels of CysLTs in acute and chronic brain lesions, the association between the genetic polymorphisms in the LTs biosynthesis pathways and the risk of cerebral pathological events, and the evidence from animal models link also CysLTs and brain diseases. This review will give an overview of how far research has gone into the evaluation of the role of CysLTs in the most prevalent neurodegenerative disorders (ischemia, Alzheimer's and Parkinson's diseases, multiple sclerosis/experimental autoimmune encephalomyelitis, and epilepsy) in order to understand the underlying mechanism by which they might be central in the disease progression.
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245
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Bhattarai P, Thomas AK, Zhang Y, Kizil C. The effects of aging on Amyloid-β42-induced neurodegeneration and regeneration in adult zebrafish brain. NEUROGENESIS 2017; 4:e1322666. [PMID: 28656156 DOI: 10.1080/23262133.2017.1322666] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Revised: 04/17/2017] [Accepted: 04/19/2017] [Indexed: 10/19/2022]
Abstract
Alzheimer disease is the most prevalent neurodegenerative disease and is associated with aggregation of Amyloid-β42 peptides. In mammals, Amyloid-β42 causes impaired neural stem/progenitor cell (NSPC) proliferation and neurogenesis, which exacerbate with aging. The molecular programs necessary to enhance NSPC proliferation and neurogenesis in our brains to mount successful regeneration are largely unknown. Therefore, to identify the molecular basis of effective brain regeneration, we previously established an Amyloid-β42 model in adult zebrafish that displayed Alzheimer-like phenotypes reminiscent of humans. Interestingly, zebrafish exhibited enhanced NSPC proliferation and neurogenesis after microinjection of Amyloid-β42 peptide. Here, we compare old and young fish to address the effects of aging on regenerative ability after Amyloid-β42 deposition. We found that aging does not affect the rate of NSPC proliferation but reduces the neurogenic response and microglia/macrophage activation after microinjection of Amyloid-β42 in zebrafish, suggesting an important link between aging, neuroinflammation, regenerative neurogenesis and neural stem cell plasticity.
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Affiliation(s)
- Prabesh Bhattarai
- German Centre for Neurodegenerative Diseases (DZNE) Dresden within Helmholtz Association, Dresden, Germany.,Center for Regenerative Therapies Dresden (CRTD), Technische Universität Dresden, Dresden, Germany
| | - Alvin Kuriakose Thomas
- B CUBE, Center for Molecular Bioengineering, Technische Universität Dresden, Dresden, Germany
| | - Yixin Zhang
- B CUBE, Center for Molecular Bioengineering, Technische Universität Dresden, Dresden, Germany
| | - Caghan Kizil
- German Centre for Neurodegenerative Diseases (DZNE) Dresden within Helmholtz Association, Dresden, Germany.,Center for Regenerative Therapies Dresden (CRTD), Technische Universität Dresden, Dresden, Germany
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246
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Naitoh H, Suganuma Y, Ueda Y, Sato T, Hiramuki Y, Fujisawa-Sehara A, Taketani S, Araki M. Upregulation of matrix metalloproteinase triggers transdifferentiation of retinal pigmented epithelial cells in Xenopus laevis: A Link between inflammatory response and regeneration. Dev Neurobiol 2017; 77:1086-1100. [PMID: 28371543 DOI: 10.1002/dneu.22497] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Revised: 03/23/2017] [Accepted: 03/23/2017] [Indexed: 11/09/2022]
Abstract
In adult Xenopus eyes, when the whole retina is removed, retinal pigmented epithelial (RPE) cells become activated to be retinal stem cells and regenerate the whole retina. In the present study, using a tissue culture model, it was examined whether upregulation of matrix metalloproteinases (Mmps) triggers retinal regeneration. Soon after retinal removal, Xmmp9 and Xmmp18 were strongly upregulated in the tissues of the RPE and the choroid. In the culture, Mmp expression in the RPE cells corresponded with their migration from the choroid. A potent MMP inhibitor, 1,10-PNTL, suppressed RPE cell migration, proliferation, and formation of an epithelial structure in vitro. The mechanism involved in upregulation of Mmps was further investigated. After retinal removal, inflammatory cytokine genes, IL-1β and TNF-α, were upregulated both in vivo and in vitro. When the inflammation inhibitors dexamethasone or Withaferin A were applied in vitro, RPE cell migration was severely affected, suppressing transdifferentiation. These results demonstrate that Mmps play a pivotal role in retinal regeneration, and suggest that inflammatory cytokines trigger Mmp upregulation, indicating a direct link between the inflammatory reaction and retinal regeneration. © 2017 Wiley Periodicals, Inc. Develop Neurobiol 77: 1086-1100, 2017.
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Affiliation(s)
- Hanako Naitoh
- Developmental Neurobiology Laboratory, Department of Biological Sciences, Nara Women's University, Nara, 630-8506, Japan
| | - Yukari Suganuma
- Developmental Neurobiology Laboratory, Department of Biological Sciences, Nara Women's University, Nara, 630-8506, Japan
| | - Yoko Ueda
- Developmental Neurobiology Laboratory, Department of Biological Sciences, Nara Women's University, Nara, 630-8506, Japan
| | - Takahiko Sato
- Department of Growth Regulation, Institute of Frontier Medical Sciences, Kyoto University, 606-8585, Japan
| | - Yosuke Hiramuki
- Department of Growth Regulation, Institute of Frontier Medical Sciences, Kyoto University, 606-8585, Japan
| | - Atsuko Fujisawa-Sehara
- Department of Growth Regulation, Institute of Frontier Medical Sciences, Kyoto University, 606-8585, Japan
| | - Shigeru Taketani
- Department of Biotechnology, Kyoto Institute of Technology, Kyoto, 606-8585, Japan
| | - Masasuke Araki
- Developmental Neurobiology Laboratory, Department of Biological Sciences, Nara Women's University, Nara, 630-8506, Japan.,Unit of Neural Development and Regeneration, Department of Biology, Nara Medical University, Nara, 634-8521, Japan
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247
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Immunomodulation-accelerated neuronal regeneration following selective rod photoreceptor cell ablation in the zebrafish retina. Proc Natl Acad Sci U S A 2017; 114:E3719-E3728. [PMID: 28416692 DOI: 10.1073/pnas.1617721114] [Citation(s) in RCA: 97] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Müller glia (MG) function as inducible retinal stem cells in zebrafish, completely repairing the eye after damage. The innate immune system has recently been shown to promote tissue regeneration in which classic wound-healing responses predominate. However, regulatory roles for leukocytes during cellular regeneration-i.e., selective cell-loss paradigms akin to degenerative disease-are less well defined. To investigate possible roles innate immune cells play during retinal cell regeneration, we used intravital microscopy to visualize neutrophil, macrophage, and retinal microglia responses to induced rod photoreceptor apoptosis. Neutrophils displayed no reactivity to rod cell loss. Peripheral macrophage cells responded to rod cell loss, as evidenced by morphological transitions and increased migration, but did not enter the retina. Retinal microglia displayed multiple hallmarks of immune cell activation: increased migration, translocation to the photoreceptor cell layer, proliferation, and phagocytosis of dying cells. To test function during rod cell regeneration, we coablated microglia and rod cells or applied immune suppression and quantified the kinetics of (i) rod cell clearance, (ii) MG/progenitor cell proliferation, and (iii) rod cell replacement. Coablation and immune suppressants applied before cell loss caused delays in MG/progenitor proliferation rates and slowed the rate of rod cell replacement. Conversely, immune suppressants applied after cell loss had been initiated led to accelerated photoreceptor regeneration kinetics, possibly by promoting rapid resolution of an acute immune response. Our findings suggest that microglia control MG responsiveness to photoreceptor loss and support the development of immune-targeted therapeutic strategies for reversing cell loss associated with degenerative retinal conditions.
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248
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Lindsey BW, Kaslin J. Optical Projection Tomography as a Novel Method to Visualize and Quantitate Whole-Brain Patterns of Cell Proliferation in the Adult Zebrafish Brain. Zebrafish 2017; 14:574-577. [PMID: 28296621 DOI: 10.1089/zeb.2017.1418] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
How distinct cell populations are distributed in three-dimensional space under homeostasis or following injury, neurodegeneration, or with senescence can teach us much about brain-wide patterns and signaling along the neuroaxis. Visualizing individual cell populations in the mature vertebrate central nervous system (CNS) has remained a challenge as a result of difficulty clearing adult brain tissue or limitations in imaging depth or resolution. We have developed a simple clearing and imaging pipeline optimally suited for the adult zebrafish brain to investigate changes in patterns of cell proliferation in wild-type and transgenic backgrounds that can easily be quantified and represented using FIJI and IMARIS software.
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Affiliation(s)
- Benjamin W Lindsey
- Australian Regenerative Medicine Institute, Monash University , Clayton, Australia
| | - Jan Kaslin
- Australian Regenerative Medicine Institute, Monash University , Clayton, Australia
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249
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Kaslin J, Kroehne V, Ganz J, Hans S, Brand M. Distinct roles of neuroepithelial-like and radial glia-like progenitor cells in cerebellar regeneration. Development 2017; 144:1462-1471. [PMID: 28289134 DOI: 10.1242/dev.144907] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Accepted: 03/03/2017] [Indexed: 12/20/2022]
Abstract
Zebrafish can regenerate after brain injury, and the regenerative process is driven by resident stem cells. Stem cells are heterogeneous in the vertebrate brain, but the significance of having heterogeneous stem cells in regeneration is not understood. Limited availability of specific stem cells might impair the regeneration of particular cell lineages. We studied regeneration of the adult zebrafish cerebellum, which contains two major stem and progenitor cell types: ventricular zone and neuroepithelial cells. Using conditional lineage tracing we demonstrate that cerebellar regeneration depends on the availability of specific stem cells. Radial glia-like cells are thought to be the predominant stem cell type in homeostasis and after injury. However, we find that radial glia-like cells play a minor role in adult cerebellar neurogenesis and in recovery after injury. Instead, we find that neuroepithelial cells are the predominant stem cell type supporting cerebellar regeneration after injury. Zebrafish are able to regenerate many, but not all, cell types in the cerebellum, which emphasizes the need to understand the contribution of different adult neural stem and progenitor cell subtypes in the vertebrate central nervous system.
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Affiliation(s)
- Jan Kaslin
- Biotechnology Center and Center for Regenerative Therapies Dresden, Dresden University of Technology, Tatzberg 47 01307, Germany .,Australian Regenerative Medicine Institute, Monash University, Innovation Walk 15, Lvl1, 3800, Clayton, Melbourne, Australia
| | - Volker Kroehne
- Biotechnology Center and Center for Regenerative Therapies Dresden, Dresden University of Technology, Tatzberg 47 01307, Germany
| | - Julia Ganz
- Biotechnology Center and Center for Regenerative Therapies Dresden, Dresden University of Technology, Tatzberg 47 01307, Germany
| | - Stefan Hans
- Biotechnology Center and Center for Regenerative Therapies Dresden, Dresden University of Technology, Tatzberg 47 01307, Germany
| | - Michael Brand
- Biotechnology Center and Center for Regenerative Therapies Dresden, Dresden University of Technology, Tatzberg 47 01307, Germany
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250
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Duy PQ, Berberoglu MA, Beattie CE, Hall CW. Cellular responses to recurrent pentylenetetrazole-induced seizures in the adult zebrafish brain. Neuroscience 2017; 349:118-127. [PMID: 28238851 DOI: 10.1016/j.neuroscience.2017.02.032] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Revised: 02/07/2017] [Accepted: 02/15/2017] [Indexed: 10/20/2022]
Abstract
A seizure is a sustained increase in brain electrical activity that can result in loss of consciousness and injury. Understanding how the brain responds to seizures is important for development of new treatment strategies for epilepsy, a neurological condition characterized by recurrent and unprovoked seizures. Pharmacological induction of seizures in rodent models results in a myriad of cellular alterations, including inflammation, angiogenesis, and adult neurogenesis. The purpose of this study is to investigate the cellular responses to recurrent pentylenetetrazole seizures in the adult zebrafish brain. We subjected zebrafish to five once-daily pentylenetetrazole-induced seizures and characterized the cellular consequences of these seizures. In response to recurrent seizures, we found histologic evidence of vasodilatation, perivascular leukocyte egress and leukocyte proliferation suggesting seizure-induced acute CNS inflammation. We also found evidence of increased proliferation, neurogenesis, and reactive gliosis following pentylenetetrazole-induced seizures. Collectively, our results suggest that the cellular responses to seizures in the adult zebrafish brain are similar to those observed in mammalian brains.
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Affiliation(s)
- Phan Q Duy
- Department of Neuroscience, The Ohio State University, Columbus, OH 43210, USA
| | - Michael A Berberoglu
- Department of Molecular Genetics and Biological Chemistry and Pharmacology, The Ohio State University, Columbus, OH 43210, USA
| | - Christine E Beattie
- Department of Neuroscience, The Ohio State University, Columbus, OH 43210, USA.
| | - Charles W Hall
- Premier Health Clinical Neuroscience Institute, Boonshoft School of Medicine, Wright State University, Dayton, OH 45435, USA
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