Cell and molecular signaling, and transport pathways involved in growth factor control of synaptic development and function PDF Download
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Author: Akira Yoshii
Publisher: Frontiers Media SA
ISBN: 2889196437
Category : Molecular biology
Languages : en
Pages : 114
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Book Description
Brain derived neurotophic factor (BDNF) and its receptor tropomyosin receptor kinase B (TrkB) signaling has been extensively studied for its roles in the central nervous system (CNS) ranging from cell survival, axonal and dendritic growth and synapse formation. Intracellular signaling pathways triggered by BDNF activate gene transcription, translation, post-translational functions, trafficking of key synaptic proteins, and synaptic release mechanism. BDNF-TrkB signaling mediates long-lasting activity-modulated synaptic changes on excitatory and inhibitory neurons and plays significant roles in circuit development and modulation. Furthermore, this pathway is critical for learning, memory, sensory processing and other cognitive functions, and is implicated in neurological and psychiatric diseases. In addition to BDNF, more recent studies have identified new “growth” factors that play important roles in the development, maturation and maintenance and modulation of synaptic function. However, details of the cytoplamic signaling systems downstream of these synaptogenic factors are often less understood than conventional neurotophin signaling. This e-Book has collected original studies and review articles that present cellular and molecular mechanisms concerning activity-dependent synapse formation and their implications for behavior and brain disorders. It is our hope that readers will perceive this volume as a showcase for diversity and complexity of synaptogenic growth factors, and will stimulate further studies in this field.
Author: Akira Yoshii
Publisher: Frontiers Media SA
ISBN: 2889196437
Category : Molecular biology
Languages : en
Pages : 114
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Book Description
Brain derived neurotophic factor (BDNF) and its receptor tropomyosin receptor kinase B (TrkB) signaling has been extensively studied for its roles in the central nervous system (CNS) ranging from cell survival, axonal and dendritic growth and synapse formation. Intracellular signaling pathways triggered by BDNF activate gene transcription, translation, post-translational functions, trafficking of key synaptic proteins, and synaptic release mechanism. BDNF-TrkB signaling mediates long-lasting activity-modulated synaptic changes on excitatory and inhibitory neurons and plays significant roles in circuit development and modulation. Furthermore, this pathway is critical for learning, memory, sensory processing and other cognitive functions, and is implicated in neurological and psychiatric diseases. In addition to BDNF, more recent studies have identified new “growth” factors that play important roles in the development, maturation and maintenance and modulation of synaptic function. However, details of the cytoplamic signaling systems downstream of these synaptogenic factors are often less understood than conventional neurotophin signaling. This e-Book has collected original studies and review articles that present cellular and molecular mechanisms concerning activity-dependent synapse formation and their implications for behavior and brain disorders. It is our hope that readers will perceive this volume as a showcase for diversity and complexity of synaptogenic growth factors, and will stimulate further studies in this field.
Author: Bruce Alberts
Publisher:
ISBN: 9780815332183
Category : Cytology
Languages : en
Pages : 0
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Book Description
Author: Sarah Justina Gamble
Publisher:
ISBN:
Category :
Languages : en
Pages : 230
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Book Description
The neuronal cytoskeleton is responsible for governing dynamics such as neurite extension and cortex development. In particular, microtubules (MTs) and their associated proteins, and molecular motors, have been shown to be critical in many neuronal processes such as intracellular molecular transport and neuron differentiation. The fibroblast growth factors (FGFs) act as powerful morphogens that have been shown to play a role in regulating cortical development. FGFs activate receptor tyrosine kinases, of which fibroblast growth factor receptor substrate 3 (FRS3) has been shown to interact with, to mediate downstream signaling cascades (regulating cell proliferation and differentiation). In addition to FRS3 and its role in signaling, preliminary evidence suggested that FRS3 is a novel MT binding protein, and also interacts with MT associated proteins and the molecular motor kinesin. Furthermore, the expression of FRS3 has been shown to coincide with migrating cortical neurons from E12 cortical precursor cell cultures. This thesis hypothesized that FRS3 regulates the differentiation and maturation of neurons as well as post-mitotic neuron function by regulating MT stability and intracellular transport of cargo and organelles. The research presented here has addressed this hypothesis in a multidisciplinary manner. First, FRS3 and its MT binding properties and its interactions with various proteins involved in molecular transport within cortical and hippocampal neurons (including motors, adapters and cargo) were investigated. FRS3 was shown to interact with markers of migrating and post-mitotic neurons (acetylated alpha and Beta III tubulin, respectively), postsynaptic density scaffolding proteins (Shank 2 and 3), cargo (Flg/FGFR1), molecular motor components (Kinesin Heavy Chain and Kinesin Light Chain), synaptic vesicle proteins (Syntaxin I and Synaptophysin) and finally MT associated proteins (MAP2, Doublecortin and Tau). Next, loss of FRS3 expression in SN56 cells resulted in increased sensitivity to the MT depolymerizing agent nocodazole, suggesting FRS3 is necessary for proper MT dynamics. Furthermore, loss of FRS3, but not the related signaling adaptor FRS2, resulted in impaired neurite outgrowth in both hippocampal and cortical cell culture. These results, taken together, suggest that FRS3, in addition to its role in FGF signaling, also interacts with members of the molecular transport machinery and confers stability to microtubules.
Author: David A. Frank
Publisher: Springer Science & Business Media
ISBN: 1402073402
Category : Medical
Languages : en
Pages : 358
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Book Description
One of the most exciting areas of cancer research now is the development of agents which can target signal transduction pathways that are activated inappropriately in malignant cells. The understanding of the molecular abnormalities which distinguish malignant cells from their normal counterparts has grown tremendously. This volume summarizes the current research on the role that signal transduction pathways play in the pathogenesis of cancer and how this knowledge may be used to develop the next generation of more effective and less toxic anticancer agents. Series Editor comments: "The biologic behavior of both normal and cancer cells is determined by critical signal transduction pathways. This text provides a comprehensive review of the field. Leading investigators discuss key molecules that may prove to be important diagnostic and/or therapeutic targets."
Author: Federico Bermudez-Rattoni
Publisher: CRC Press
ISBN: 1420008412
Category : Psychology
Languages : en
Pages : 368
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Book Description
A comprehensive, multidisciplinary review, Neural Plasticity and Memory: From Genes to Brain Imaging provides an in-depth, up-to-date analysis of the study of the neurobiology of memory. Leading specialists share their scientific experience in the field, covering a wide range of topics where molecular, genetic, behavioral, and brain imaging techniq
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 129
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Book Description
Synapses are the basic units of neural structure and function. Proper synaptic growth is essential for normal development of the nervous system and its function in mediating complex behaviors such as learning and memory. In my dissertation work, I took a combined approach of genetics, molecular biology and biochemistry to identify genes and molecular pathways that regulate synaptic growth in Drosophila, and discovered neuropeptide signaling as a novel mechanism in this process. Neuropeptides have been known to affect neuronal excitability and the strength of synaptic transmission. However, neuropeptides have not been clearly implicated in synaptic growth and development. Through forward genetics, I discovered a cholecystokinin-like receptor (CCKLR) and its predicted ligand drosulfakinin (DSK), as components of a signaling pathway that strongly promote growth of the Drosophila larval neuromuscular junction (NMJ). Loss-of-function mutations of CCKLR or dsk produce severe NMJ undergrowth, whereas over-expression of CCKLR leads to NMJ overgrowth. Through targeted RNAi expression and transgenic rescue experiments I show that presynaptic expression of CCKLR in motor neurons is necessary and sufficient for regulation of NMJ growth. Through analysis of double mutants, I have dissected the signaling pathway downstream of the receptor. I show that this pathway involves G-protein-dependent stimulation of adenyl cyclase to activate PKA, which in turn activates CREB, the cAMP-response element binding protein. In addition, I demonstrate that DSK activates CCKLR biochemically, and that DSK/CCKLR signaling affects synaptic transmission and larval locomotor behavior. To discover novel genes that interact with the CCKLR-signaling pathway to regulate NMJ growth, I performed a modifier screen using chromosomal deficiencies. This pilot screen has identified several regions on the second and third chromosomes that dominantly enhance or suppress the NMJ phenotype of CCKLR mutants. Intriguingly, a number of neuropeptide signaling molecules were found among the candidate interacting genes. Specifically, I have found that leucokinin (DLK) and leucokinin receptor (LKR) negatively regulate NMJ growth, and strongly interact with CCKLR. The results of the modifier screen suggest that neuropeptide signaling may be a more common mechanism for regulating NMJ growth than previously realized and many of the molecules are yet to be uncovered.
Author:
Publisher:
ISBN:
Category : Medicine
Languages : en
Pages : 1398
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Book Description
Author:
Publisher:
ISBN:
Category : Medicine
Languages : en
Pages : 1398
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Book Description
Author: Eduardo E. Benarroch
Publisher: Oxford University Press
ISBN: 0190948892
Category : Medical
Languages : en
Pages : 833
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Book Description
"The aim of this book is to provide the clinician with a comprehensive and clinical relevant survey of emerging concepts on the organization and function of the nervous system and neurologic disease mechanisms, at the molecular, cellular and system levels. The content of is based on the review of information obtained from recent advances in genetic, molecular and cell biology techniques, electrophysiological recordings, brain mapping, and mouse models, emphasizing the clinical and possible therapeutic implications. Many chapters of this book contain information that will be relevant not only clinical neurologists but also to psychiatrists and physical therapists. The scope includes the mechanisms and abnormalities of DNA/RNA metabolism, proteostasis, vesicular biogenesis, and axonal transport and mechanisms of neurodegeneration; the role of the mitochondria in cell function and death mechanisms; ion channels, neurotransmission and mechanisms of channelopathies and synaptopathies; the functions of astrocytes, oligodendrocytes and microglia and their involvement in disease; the local circuits and synaptic interactions at the level of the cerebral cortex, thalamus, basal ganglia, cerebellum, brainstem and spinal cord transmission regulating sensory processing, behavioral state and motor functions; the peripheral and central mechanisms of pain and homeostasis; and networks involved in emotion, memory, language, and executive function"--
Author: Peterson's
Publisher: Peterson Nelnet Company
ISBN: 9781560796534
Category : Reference
Languages : en
Pages : 2494
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Book Description
Graduate students depend on this series and ask for it by name. Why? For over 30 years, it's been the only one-stop source that supplies all of their information needs. The new editions of this six-volume set contain the most comprehensive information available on more than 1,500 colleges offering over 31,000 master's, doctoral, and professional-degree programs in more than 350 disciplines. New for 1997 -- Non-degree-granting research centers, institutes, and training programs that are part of a graduate degree program. Five discipline-specific volumes detail entrance and program requirements, deadlines, costs, contacts, and special options, such as distance learning, for each program, if available. Each Guide features "The Graduate Adviser", which discusses entrance exams, financial aid, accreditation, and more. The only source that covers nearly 4,000 programs in such areas as oncology, conservation biology, pharmacology, and zoology.
