Role Of Neuronal Gap Junction Proteins In Regulating Post Natal Hippocampal Neurodegeneration And Neurogenesis In Vitro And In Vivo
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| Author | : Gerd Kempermann |
| Publisher | : Oxford University Press, USA |
| Total Pages | : 464 |
| Release | : 2006 |
| Genre | : Language Arts & Disciplines |
| ISBN | : 9780195179712 |
This is the first comprehensive, integrated account of one of the most exciting areas of neuroscience-the intersection between the discoveries that the adult brain makes new neurons and that it contains stem cells. The book begins with the historical background and discusses theories of adult neurogenesis and neural stem cell biology in the context of learning and memory processes as well as structural plasticity. It describes in detail neurogenesis in the adult hippocampus and olfactory system and then surveys the regulatory, functional, and comparative aspects, concluding with a chapter on the provocative hypotheses that link failing adult neurogenesis with such diseases as temporal lobe epilepsy, major depression, brain tumors, and dementias. This readable, single-authored volume is a unique resource for graduate students, investigators, and clinicians in the neurosciences, developmental biology, and stem cell research.
| Author | : Daniel Laskowitz |
| Publisher | : CRC Press |
| Total Pages | : 388 |
| Release | : 2016-04-21 |
| Genre | : Medical |
| ISBN | : 1498766579 |
Traumatic brain injury (TBI) remains a significant source of death and permanent disability, contributing to nearly one-third of all injury related deaths in the United States and exacting a profound personal and economic toll. Despite the increased resources that have recently been brought to bear to improve our understanding of TBI, the developme
| Author | : Clévio Nóbrega |
| Publisher | : Springer |
| Total Pages | : 467 |
| Release | : 2018-02-09 |
| Genre | : Medical |
| ISBN | : 3319717790 |
This book provides a cutting-edge review of polyglutamine disorders. It primarily focuses on two main aspects: (1) the mechanisms underlying the pathologies’ development and progression, and (2) the therapeutic strategies that are currently being explored to stop or delay disease progression. Polyglutamine (polyQ) disorders are a group of inherited neurodegenerative diseases with a fatal outcome that are caused by an abnormal expansion of a coding trinucleotide repeat (CAG), which is then translated in an abnormal protein with an elongated glutamine tract (Q). To date, nine polyQ disorders have been identified and described: dentatorubral-pallidoluysian atrophy (DRPLA); Huntington’s disease (HD); spinal–bulbar muscular atrophy (SBMA); and six spinocerebellar ataxias (SCA 1, 2, 3, 6, 7, and 17). The genetic basis of polyQ disorders is well established and described, and despite important advances that have opened up the possibility of generating genetic models of the disease, the mechanisms that cause neuronal degeneration are still largely unknown and there is currently no treatment available for these disorders. Further, it is believed that the different polyQ may share some mechanisms and pathways contributing to neurodegeneration and disease progression.
| Author | : S. J. Pleasure |
| Publisher | : S. Karger AG (Switzerland) |
| Total Pages | : 0 |
| Release | : 2006 |
| Genre | : Hippocampus (Brain) |
| ISBN | : 9783805581929 |
The hippocampal formation plays a critical role in navigation and memory under normal conditions. In pathologies such as Alzheimer's disease and epilepsy, the hippocampus represents one of the first brain regions to suffer damage. When hippocampal development is abnormal, pathological conditions featuring cognitive dysfunction and seizures are common, particularly in children. This publication summarizes new data and relevant findings to a critical understanding of hippocampal development - from anatomy to physiology and from rodents to human. It provides original articles on developmental pathology and on the ongoing role of developmental signaling systems in adults. Broadly, the topics include processes involved in the development of normal or abnormal hippocampus and pathological implications associated with normal or abnormal development, and neurogenesis in an immature or adult hippocampus. Presenting a wide-ranging collection of contributions on hippocampal development, this issue will be of great value for neurobiologists, neurologists, psychiatrists and pediatricians.
| Author | : Brian D. Gulbransen |
| Publisher | : Biota Publishing |
| Total Pages | : 72 |
| Release | : 2014-07-01 |
| Genre | : Medical |
| ISBN | : 1615046615 |
The enteric nervous system (ENS) is a complex neural network embedded in the gut wall that orchestrates the reflex behaviors of the intestine. The ENS is often referred to as the “little brain” in the gut because the ENS is more similar in size, complexity and autonomy to the central nervous system (CNS) than other components of the autonomic nervous system. Like the brain, the ENS is composed of neurons that are surrounded by glial cells. Enteric glia are a unique type of peripheral glia that are similar to astrocytes of the CNS. Yet enteric glial cells also differ from astrocytes in many important ways. The roles of enteric glial cell populations in the gut are beginning to come to light and recent evidence implicates enteric glia in almost every aspect of gastrointestinal physiology and pathophysiology. However, elucidating the exact mechanisms by which enteric glia influence gastrointestinal physiology and identifying how those roles are altered during gastrointestinal pathophysiology remain areas of intense research. The purpose of this e-book is to provide an introduction to enteric glial cells and to act as a resource for ongoing studies on this fascinating population of glia. Table of Contents: Introduction / A Historical Perspective on Enteric Glia / Enteric Glia: The Astroglia of the Gut / Molecular Composition of Enteric Glia / Development of Enteric Glia / Functional Roles of Enteric Glia / Enteric Glia and Disease Processes in the Gut / Concluding Remarks / References / Author Biography
| Author | : Nancy Y. Ip |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 326 |
| Release | : 2009-02-28 |
| Genre | : Medical |
| ISBN | : 0387788875 |
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.
| Author | : Udo Rüb |
| Publisher | : Springer |
| Total Pages | : 154 |
| Release | : 2015-09-29 |
| Genre | : Medical |
| ISBN | : 331919285X |
This monograph describes the progress in neuropathological HD research made during the last century, the neuropathological hallmarks of HD and their pathogenic relevance. Starting with the initial descriptions of the progressive degeneration of the striatum as one of the key events in HD, the worldwide practiced Vonsattel HD grading system of striatal neurodegeneration will be outlined. Correlating neuropathological data with results on the functional neuroanatomy of the human brain, subsequent chapters will highlight recent HD findings: the neuronal loss in the cerebral neo-and allocortex, the neurodegeneration of select thalamic nuclei, the affection of the cerebellar cortex and nuclei, the involvement of select brainstem nuclei, as well as the pathophysiological relevance of these pathologies for the clinical picture of HD. Finally, the potential pathophysiological role of neuronal huntingtin aggregations and the most important and enduring challenges of neuropathological HD research are discussed.
| Author | : |
| Publisher | : |
| Total Pages | : 1216 |
| Release | : 1995 |
| Genre | : Medicine |
| ISBN | : |
| Author | : Vladimir Parpura |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 701 |
| Release | : 2008-12-11 |
| Genre | : Medical |
| ISBN | : 0387794921 |
Astrocytes were the original neuroglia that Ramón y Cajal visualized in 1913 using a gold sublimate stain. This stain targeted intermediate filaments that we now know consist mainly of glial fibrillary acidic protein, a protein used today as an astrocytic marker. Cajal described the morphological diversity of these cells with some ast- cytes surrounding neurons, while the others are intimately associated with vasculature. We start the book by discussing the heterogeneity of astrocytes using contemporary tools and by calling into question the assumption by classical neuroscience that neurons and glia are derived from distinct pools of progenitor cells. Astrocytes have long been neglected as active participants in intercellular communication and information processing in the central nervous system, in part due to their lack of electrical excitability. The follow up chapters review the “nuts and bolts” of ast- cytic physiology; astrocytes possess a diverse assortment of ion channels, neu- transmitter receptors, and transport mechanisms that enable the astrocytes to respond to many of the same signals that act on neurons. Since astrocytes can detect chemical transmitters that are released from neurons and can release their own extracellular signals there is an increasing awareness that they play physiological roles in regulating neuronal activity and synaptic transmission. In addition to these physiological roles, it is becoming increasingly recognized that astrocytes play critical roles during pathophysiological states of the nervous system; these states include gliomas, Alexander disease, and epilepsy to mention a few.
| Author | : Enrico Cherubini |
| Publisher | : Frontiers Media SA |
| Total Pages | : 167 |
| Release | : 2015-08-19 |
| Genre | : Hippocampus (Brain) |
| ISBN | : 2889196313 |
The CA3 hippocampal region receives information from the entorhinal cortex either directly from the perforant path or indirectly from the dentate gyrus via the mossy fibers (MFs). According to their specific targets (principal/mossy cells or interneurons), MFs terminate with large boutons or small filopodial extensions, respectively. MF-CA3 synapses are characterized by a low probability of release and pronounced frequency-dependent facilitation. In addition MF terminals are endowed with mGluRs that regulate their own release. We will describe the intrinsic membrane properties of pyramidal cells, which can sometimes fire in bursts, together with the geometry of their dendritic arborization. The single layer of pyramidal cells is quite distinct from the six-layered neocortical arrangement. The resulting aligned dendrites provides the substrate for laminated excitatory inputs. They also underlie a precise, diversity of inhibitory control which we will also describe in detail. The CA3 region has an especially rich internal connectivity, with recurrent excitatory and inhibitory loops. In recent years both in vivo and in vitro studies have allowed to better understand functional properties of the CA3 auto-associative network and its role in information processing. This circuit is implicated in encoding spatial representations and episodic memories. It generates physiological population synchronies, including gamma, theta and sharp-waves that are presumed to associate firing in selected assemblies of cells in different behavioral conditions. The CA3 region is susceptible to neurodegeneration during aging and after stresses such as infection or injury. Loss of some CA3 neurones has striking effects on mossy fiber inputs and can facilitate the generation of pathologic synchrony within the CA3 micro-circuit. The aim of this special topic is to bring together experts on the cellular and molecular mechanisms regulating the wiring properties of the CA3 hippocampal microcircuit in both physiological and pathological conditions, synaptic plasticity, behavior and cognition.We will particularly emphasize the dual glutamatergic and GABAergic phenotype of MF-CA3 synapses at early developmental stages and the steps that regulate the integration of newly generated neurons into the adult dentate gyrus-CA3 circuit.
