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Mechanisms Of Neuronal Migration During Corticogenesis
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Book Synopsis Mechanisms of Neuronal Migration during Corticogenesis by : Chiaki Ohtaka-Maruyama
Download or read book Mechanisms of Neuronal Migration during Corticogenesis written by Chiaki Ohtaka-Maruyama and published by Frontiers Media SA. This book was released on 2016-07-15 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt: The cerebral cortex plays central roles in many higher-order functions such as cognition, language, consciousness, and the control of voluntary behavior. These processes are performed by the densely interconnected networks of excitatory pyramidal neurons and inhibitory interneurons, and the balanced development of these two types of neuron is quite important. During cortical development, pyramidal neurons and interneurons show quite different migratory behaviors: radial migration and tangential migration, respectively. Pyramidal neurons are generated in the ventricular zone of the dorsal telencephalon, and migrate radially along radial glial fibers toward the pial surface, forming a six-layered cortical structure in an “ inside-out” manner. On the other hand, cortical interneurons are generated in the medial and caudal ganglionic eminence in the ventral telencephalon, and follow long tangential migratory paths into the cortex. Defects in these migration processes result in abnormalities in the cortical layer structure and neuronal networks, which may cause various neurological and psychiatric conditions such as epilepsy and schizophrenia. Accordingly, besides basic scientific interest, elucidation of the mechanism of neuronal migration is essential for understanding the pathogenesis of these diseases. This Research Topic includes a series of articles ranging from the basic mechanism of neocortical development to the malformation and evolution of the neocortex. We do hope that the present ebook will further stimulate the interest in the fascinating investigations of neuronal migration and corticogenesis.
Book Synopsis Mechanisms of Neuronal Migration During Corticogenesis by :
Download or read book Mechanisms of Neuronal Migration During Corticogenesis written by and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The cerebral cortex plays central roles in many higher-order functions such as cognition, language, consciousness, and the control of voluntary behavior. These processes are performed by the densely interconnected networks of excitatory pyramidal neurons and inhibitory interneurons, and the balanced development of these two types of neuron is quite important. During cortical development, pyramidal neurons and interneurons show quite different migratory behaviors: radial migration and tangential migration, respectively. Pyramidal neurons are generated in the ventricular zone of the dorsal telencephalon, and migrate radially along radial glial fibers toward the pial surface, forming a six-layered cortical structure in an " inside-out" manner. On the other hand, cortical interneurons are generated in the medial and caudal ganglionic eminence in the ventral telencephalon, and follow long tangential migratory paths into the cortex. Defects in these migration processes result in abnormalities in the cortical layer structure and neuronal networks, which may cause various neurological and psychiatric conditions such as epilepsy and schizophrenia. Accordingly, besides basic scientific interest, elucidation of the mechanism of neuronal migration is essential for understanding the pathogenesis of these diseases. This Research Topic includes a series of articles ranging from the basic mechanism of neocortical development to the malformation and evolution of the neocortex. We do hope that the present ebook will further stimulate the interest in the fascinating investigations of neuronal migration and corticogenesis.
Book Synopsis The Extracellular Environment in Controlling Neuronal Migration During Neocortical Development by : Yuki Hirota
Download or read book The Extracellular Environment in Controlling Neuronal Migration During Neocortical Development written by Yuki Hirota and published by Frontiers Media SA. This book was released on 2021-06-30 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Role of Endocytosis in Neuronal Migration by : Jennifer Cynthia Shieh
Download or read book The Role of Endocytosis in Neuronal Migration written by Jennifer Cynthia Shieh and published by Stanford University. This book was released on 2010 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: Disruptions in neuronal migration have been implicated in a variety of human mental disorders, including epilepsy, autism, and schizophrenia. Despite the critical role of migration during nervous system development, the basic physical and cytoskeletal mechanisms of coordinated neuronal movement have not yet been fully characterized. A migrating neuron moves with morphologically distinct steps: a single leading process extends ahead of a stationary cell soma, followed by the formation of a cytoplasmic dilation ahead of the nucleus, subsequent movement of the nucleus into the dilation, and retraction of the cell rear. The temporal and spatial regulation of adhesion is important for the proper progression of these steps. I investigated the role of endocytosis in regulating adhesion during neuronal migration. Using genetic and pharmacological methods to disrupt endocytosis either in vitro or in vivo leads to altered neuronal migration. Introducing dominant negative clathrin or dynamin into the developing cortex delays radial migration in vivo. Pharmacologically inhibiting clathrin or dynamin reduces the velocity of anterior subventricular zone (SVZa) neurons migrating in a three-dimensional matrix in vitro. Components of clathrin endocytic machinery are localized to the dilation region of a migrating neuron at points of matrix attachment. The absence of adhesion molecules at the cell rear led us to the hypothesis that endocytosis weakens adhesions in the dilation to allow the cell rear to move forward during migration. In support of this hypothesis, exposing SVZa explants to pharmacological inhibitors of either clathrin or dynamin prevents migration out of explants, and neurons that have migrated out have altered morphology and adhesion molecule distribution. Neurons exposed to a dynamin inhibitor tend to have "tails" of membrane at the rear, and these tails contain adhesion molecules. The presence of adhesion molecules at the rear of migrating neurons exposed to a dynamin inhibitor supports the idea that endocytosis plays a role in regulating adhesion disassembly. Endocytosis likely plays a critical role in general neuronal migration regardless of the specific neuronal subtype, migration mode, or substrate.
Book Synopsis Mechanisms Governing Neuronal Migration and Morphology by : Margareta Nikolić
Download or read book Mechanisms Governing Neuronal Migration and Morphology written by Margareta Nikolić and published by S. Karger AG (Switzerland). This book was released on 2008 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The correct migration of neurons to specific targets underlies the normal formation and function of our nervous system. Defective movement of neurons results in their aberrant function or death, thus causing a range of developmental problems. Neurons move by responding to extracellular cues which alter the dynamic organization of cytoskeletal elements via complex and often overlapping signaling pathways. Changes in external cues or intracellular signaling molecules are responsible for altered neuronal movement and behavior, and are increasingly being associated with the occurrence of lissencephaly, epilepsy and mental retardation. This issue provides current findings and future directions towards understanding how the dynamic organization of the neuronal cytoskeleton affects movement and the consequences of normal and altered neuronal migration on the nervous system. The topics highlight the importance of specific proteins that regulate actin filaments and microtubules, and how their changes affect neuronal translocation. The effects of genetic or environmental alterations on the formation of the nervous system and the power of high-resolution imaging in analyzing both normal and defective development are emphasized. The volume will thus be of interest to a wide range of molecular and cellular neurobiologists, developmental biologists and neurologists.
Book Synopsis Normal and Abnormal Development of the Cortex by : Albert M. Galaburda
Download or read book Normal and Abnormal Development of the Cortex written by Albert M. Galaburda and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 309 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book, the seventh in the series 'Research and Perspectives in Neuroscience', contains the procedings of a meeting that was held in Paris on October14, 1996. The conference consisted of invited papers and poster presentations. The invited papers, included in this volume, were on cell proliferation prior to neuronal migration, on cellular and molecular factors characteristic of neuronal migration, and on postmigrational neuronal and axonal plasticity. There was a section devoted to disorders of neuronal migration and plasticity and the genetics of some developmental disorders. Great strides have been made in this relatively young branch of modern neuroscience.
Book Synopsis Mouse Brain Development by : Andre M. Goffinet
Download or read book Mouse Brain Development written by Andre M. Goffinet and published by Springer Science & Business Media. This book was released on 2012-08-10 with total page 347 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our understanding of the molecular mechanisms involved in mammalian brain development remains limited. However, the last few years have wit nessed a quantum leap in our knowledge, due to technological improve ments, particularly in molecular genetics. Despite this progress, the available body of data remains mostly phenomenological and reveals very little about the grammar that organizes the molecular dictionary to articulate a pheno type. Nevertheless, the recent progress in genetics will allow us to contem plate, for the first time, the integration of observation into a coherent view of brain development. Clearly, this may be a major challenge for the next century, and arguably is the most important task of contemporary develop mental biology. The purpose of the present book is to provide an overview that syn thesizes up-to-date information on selected aspects of mouse brain devel opment. Given the format, it was not possible to cover all aspects of brain development, and many important subjects are missing. The selected themes are, to a certain extent, subjective and reflect the interests of the contributing authors. Examples of major themes that are not covered are peripheral nervous system development, including myelination, the development of the hippocampus and several other CNS structures, as well as the developmental function of some important morphoregulatory molecules.
Author :Catherine Lambert de Rouvroit Publisher :Springer Science & Business Media ISBN 13 :3642722571 Total Pages :117 pages Book Rating :4.6/5 (427 download)
Book Synopsis The Reeler Mouse as a Model of Brain Development by : Catherine Lambert de Rouvroit
Download or read book The Reeler Mouse as a Model of Brain Development written by Catherine Lambert de Rouvroit and published by Springer Science & Business Media. This book was released on 2013-03-12 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt: Only five years ago, nobody in his right mind would have consid ered publishing a book on reeler as a model for brain develop ment. Although this interesting mutation has been with us for half a century, it is fair to say that, in spite of a wave of enthusiasm in the late sixties and early seventies, generated primarily by Sidman, Caviness and colleagues, studies of reeler mice fell pro gressively out of fashion during the next two decades. All that changed almost overnight when the cloning of the reeler gene, dubbed reelin, was reported in Tom Curran's laboratory in 1995. The fact that the same gene was identified at the same time independently by two other groups using positional cloning sug gested strongly that reelin was the right candidate. Although the key experiments of transgenic rescue have not been made (and perhaps will never be), the equation "reeler is reelin" has been established beyond reasonable doubt, as alterations of the reelin gene and/or its expression have been found in at least five alleles of reeler and in the mutation Shaking Rat Kawasaki (SRK), an ortholog of reeler.
Book Synopsis Tracking Neuronal Development in the Adult Brain by : Karen Bakhshetyan
Download or read book Tracking Neuronal Development in the Adult Brain written by Karen Bakhshetyan and published by . This book was released on 2017 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: The knowledge about molecular and cellular pathways orchestrating neuronal development in the adult brain can be used to build up efficient strategies for cell replacement therapies. Adult neurogenesis is a very dynamic process, and it is crucial to monitor it directly to decipher mechanisms required for neuronal development. Furthermore, it is important to develop label-free imaging methods. My work is, in part, aimed at addressing these challenges. Adult-born neurons migrate densely along blood vessels and glial tubes in the rostral migratory stream (RMS). This alignment may create anisotropy which can be detected in polarized light. I first tried this technique for label-free detection of migratory cells in the RMS. While this imaging may have some promises, it showed that anisotropy in migrating cells is quite low and its detection is hampered by large signals deriving from nearby myelinated axons. I further studied the migration of virally labeled neuroblasts to elucidate some of the mechanisms required for their migration. GABAergic signaling plays an important role in neuronal migration and is defined by transmembrane Cl- gradient. This, in turn is controlled by the Cl- extruding co-transporter KCC2, known to have a late developmental expression. The role of KCC2 in neuronal migration is unknown and my experiments suggest that this co-transporter is involved in the radial, but not tangential migration of neuroblasts. Finally, I explored in vivo the odor-related structural plasticity of adult-born neurons in the olfactory bulb (OB). It remains unknown how OB functioning is adjusted to rapidly changing odor environment when new synapses of adult-born neurons have not yet been formed. My in vivo two-photon imaging data complements the previous work in our lab, revealing altogether a new form of structural plasticity in the adult OB. Thus, using diverse imaging methods I tried to better understand the migration and plasticity of new neurons in the adult brain.
Book Synopsis Extracellular and Intracellular Signaling by : James D. Adams
Download or read book Extracellular and Intracellular Signaling written by James D. Adams and published by Royal Society of Chemistry. This book was released on 2011 with total page 319 pages. Available in PDF, EPUB and Kindle. Book excerpt: Intracellular cell signaling is a well understood process. However, extracellular signals such as hormones, adipokines, cytokines and neurotransmitters are just as important but have been largely ignored in other works. Aimed at medical professionals and pharmaceutical specialists, this book integrates extracellular and intracellular signalling processes and offers a fresh perspective on new drug targets.
Book Synopsis Reelin Glycoprotein by : S.H. Fatemi
Download or read book Reelin Glycoprotein written by S.H. Fatemi and published by Springer Science & Business Media. This book was released on 2008-06-04 with total page 473 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reelin glycoprotein is a serine protease with important roles in embryogenesis and during adult life. This comprehensive and integrative book examines the role that reelin plays in the etiology of various neuropsychiatric disorders, including schizophrenia and autism. The book provides an unprecedented analysis of this emerging and novel protein by examining evidence from genetic, neuroanatomic, biochemical, and behavioral studies.
Book Synopsis Coordination of Neuronal Proliferation and Migration During Corticogenesis by : Élodie Gautier
Download or read book Coordination of Neuronal Proliferation and Migration During Corticogenesis written by Élodie Gautier and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cortical cytoarchitecture relies on the spatiotemporal coordination of neuronal production rate, precursors cell-cycle control and neuronal radial migration towards the cortical plate. In the primate, area 17 supragranular layers are more developed than in area 18, due to higher proliferation and neuronal production rates in area 17 between E77-80. Two-photon videomicroscopy observations on cortical organotypic slices revealed that radial migration is faster in area 17 than 18. This indicates that area-specific variations of proliferation and migration rates are congruent during corticogenesis. The study of molecular mechanisms underlying the coordinated regulation of proliferation and migration focused on the cell-cycle regulator p27kip1, which promotes migration, via inhibition of the Rhoa GTPase by its C-terminal domain. This p27 dual function could play a major role during the Interkinetic Nuclear Migration (INM) performed by cortical precursor cells from the ventricular zone, in synchrony with the cell-cycle phases. Mutant forms of p27 or shRNA were electroporated into neuroblasts of E14-15 mice embryos. Two-photon videomicroscopy observations on organotypic slices revealed that p27 affects INM, promotes differentiative divisions and neuronal radial migration, though its C-terminal domain. P27 is thus part of a molecular network which finely tunes, in an area-specific manner, the successive rounds of divisions of precursor, as well as the migratory behavior of the newborn neurons.
Book Synopsis Cellular Migration and Formation of Axons and Dendrites by : Bin Chen
Download or read book Cellular Migration and Formation of Axons and Dendrites written by Bin Chen and published by Academic Press. This book was released on 2020-06-13 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cellular Migration and Formation of Neuronal Connections, Second Edition, the latest release in the Comprehensive Developmental Neuroscience series, presents the latest information on the genetic, molecular and cellular mechanisms of neural development. This book provides a much-needed update that underscores the latest research in this rapidly evolving field, with new section editors discussing the technological advances that are enabling the pursuit of new research on brain development. This volume focuses on the formation of axons and dendrites and cellular migration. Features leading experts in various subfields as section editors and article authors Presents articles that have been peer reviewed to ensure accuracy, thoroughness and scholarship Includes coverage of mechanisms which regulate the formation of axons and dendrites and cellular migration Covers neural activity, from cell-intrinsic maturation, to early correlated patterns of activity
Book Synopsis DCX and LIS1 Function in Radial and Lateral Neuronal Migration in Developing Cerebral Cortex by : Jilin Bai
Download or read book DCX and LIS1 Function in Radial and Lateral Neuronal Migration in Developing Cerebral Cortex written by Jilin Bai and published by . This book was released on 2006 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neuronal migration is a fundamental process in developing cerebral cortex. During embryonic development, progenitors are located in the neuroepithelium that surrounds the ventricular lumen in the telencephalon. Progenitors divide and give rise to postmitotic daughter neurons. These neurons migrate to form a stereotyped laminar and radial organization in the maturing cerebral cortex. To understand the molecular and cellular mechanism of neuronal migration is a crucial step in not only elucidating the biology of brain development, but also in gaining greater insight into the pathogenesis of human neurological diseases linked to cortical malformation such as mental retardation, epilepsy, dyslexia and schizophrenia. Two innovative studies presented in this thesis further our understanding of the function of Doublecortin (DCX) and Lissencephaly 1 (LIS1) protein molecules in neuronal migration. The first study combines in utero electroporation and RNA interference (RNAi)-medicated acute knockdown of DCX to reveal the definitive function of DCX in radial migration, a major neuronal migration pathway in developing cerebral cortex. Utilizing similar techniques with high degree of spatial control, the second study shows shared, distinct and interdependent roles of DCX and LIS1 in the lateral cortical stream (LCS), a migration route for cells that populate ventral telencephalon including the piriform cortex and amygdala.
Book Synopsis Neuronal Networks in Brain Function, CNS Disorders, and Therapeutics by : Carl Faingold
Download or read book Neuronal Networks in Brain Function, CNS Disorders, and Therapeutics written by Carl Faingold and published by Academic Press. This book was released on 2013-12-26 with total page 537 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neuronal Networks in Brain Function, CNS Disorders, and Therapeutics, edited by two leaders in the field, offers a current and complete review of what we know about neural networks. How the brain accomplishes many of its more complex tasks can only be understood via study of neuronal network control and network interactions. Large networks can undergo major functional changes, resulting in substantially different brain function and affecting everything from learning to the potential for epilepsy. With chapters authored by experts in each topic, this book advances the understanding of: How the brain carries out important tasks via networks How these networks interact in normal brain function Major mechanisms that control network function The interaction of the normal networks to produce more complex behaviors How brain disorders can result from abnormal interactions How therapy of disorders can be advanced through this network approach This book will benefit neuroscience researchers and graduate students with an interest in networks, as well as clinicians in neuroscience, pharmacology, and psychiatry dealing with neurobiological disorders. Utilizes perspectives and tools from various neuroscience subdisciplines (cellular, systems, physiologic), making the volume broadly relevant Chapters explore normal network function and control mechanisms, with an eye to improving therapies for brain disorders Reflects predominant disciplinary shift from an anatomical to a functional perspective of the brain Edited work with chapters authored by leaders in the field around the globe – the broadest, most expert coverage available
Book Synopsis Marijuana and Madness by : David Castle
Download or read book Marijuana and Madness written by David Castle and published by Cambridge University Press. This book was released on 2004-05-27 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive overview of the psychiatry and neuroscience of Cannabis sativa (marijuana), with particular emphasis on psychotic disorders. It outlines developments in our understanding of the human cannabinoid system, and links this knowledge to clinical and epidemiological facts about the impact of cannabis on mental health. Clinically focused chapters review not only the direct psychomimetic properties of cannabis, but also the impact consumption has on the courses of evolving or established mental illness such as schizophrenia. A number of controversial issues are critically explored, including whether a discrete 'cannabis psychosis' exists, and whether cannabis can actually cause schizophrenia. Effects of cannabis on mood, notably depression, are reviewed, as are its effects on cognition. This book will be of interest to all members of the mental health team, as well as to neuroscientists and those involved in drug and alcohol research.
Book Synopsis Cyclin Dependent Kinase 5 (Cdk5) by : Nancy Y. Ip
Download or read book Cyclin Dependent Kinase 5 (Cdk5) written by Nancy Y. Ip and published by Springer Science & Business Media. This book was released on 2009-02-28 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cyclin Dependent Kinase 5 provides a comprehensive and up-to-date collection of reviews on the discovery, signaling mechanisms and functions of Cdk5, as well as the potential implication of Cdk5 in the treatment of neurodegenerative diseases. Since the identification of this unique member of the Cdk family, Cdk5 has emerged as one of the most important signal transduction mediators in the development, maintenance and fine-tuning of neuronal functions and networking. Further studies have revealed that Cdk5 is also associated with the regulation of neuronal survival during both developmental stages and in neurodegenerative diseases. These observations indicate that precise control of Cdk5 is essential for the regulation of neuronal survival. The pivotal role Cdk5 appears to play in both the regulation of neuronal survival and synaptic functions thus raises the interesting possibility that Cdk5 inhibitors may serve as therapeutic treatment for a number of neurodegenerative diseases.
