Cellular and Synaptic Correlates of Learning and Memory and Their Impairment in a Mouse Model of Alzheimer's Disease PDF Download
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Author: Stefanie Poll
Publisher:
ISBN:
Category : Alzheimer's disease
Languages : en
Pages :
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Book Description
Author: Stefanie Poll
Publisher:
ISBN:
Category : Alzheimer's disease
Languages : en
Pages :
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Book Description
Author: A.D. Roses
Publisher: Springer Science & Business Media
ISBN: 3642801099
Category : Medical
Languages : en
Pages : 208
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Book Description
There is now considerable genetic evidence that the type 4 allele of the apolipoprotein E gene is a major susceptibility factor associated with late-onset Alzheimer's disease, the common form of the disease defined as starting after sixty years of age. The role of apolipoprotein E in normal brain metabolism and in the pathogenesis of Alzheimer's disease are new and exciting avenues of research. This book, written by the most outstanding scientists in this new filed, is the first presentation of results concerning the implications of apolipoprotein E on the genetics, cell biology, neuropathology, biochemistry, and therapeutic management of Alzheimer's disease.
Author: Jason Knight Clark
Publisher:
ISBN:
Category :
Languages : en
Pages : 546
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Book Description
Alzheimer's disease (AD) is a neurodegenerative disease of aging thought to be initiated by production of Amyloid-[beta] peptide, which leads to synaptic dysfunction and progressive memory loss, and the eventual formation of [beta]-Amyloid plaques and neurofibrillary Tau tangles. Working memory is one of the first cognitive impairments in AD. We therefore wanted to explore the cellular mechanisms underlying working memory impairments in AD utilizing a well-known triple transgenic mouse model of Alzheimer's disease (3xTg-AD) carrying mutations in APP, PS1, and Tau. We evaluated working memory using an 8-arm radial maze, and synaptic transmission and plasticity using an ex vivo hippocampal slice preparation to measure field Excitatory Post-Synaptic Potentials (fEPSP) in the CA1 region of ventral hippocampus. Unexpectedly, young 3xTg-AD mice at 3 months of age, typically considered to be presymptomatic, were significantly impaired in the spatial working memory task compared to Nontransgenic (NonTg) control mice. Measurements of fEPSPs to evaluate Long-Term Potentiation (LTP) as an indicator of long-term synaptic plasticity showed the NMDA receptor-dependent component of LTP (NMDAR LTP) was reduced in 3xTg-AD mice compared to NonTg mice. The remaining non-NMDA receptor-dependent component of LTP (non-NMDAR LTP) however was increased, resulting in a total LTP that was not different between 3xTg-AD and NonTg mice. At 8 months of age, 3xTg-AD mice were again significantly impaired in the spatial working memory task, and NMDAR LTP was again reduced in 3xTg-AD mice. The non-NMDAR LTP however was also reduced in 3xTg-AD mice, resulting in a total LTP that was now reduced in 3xTg-AD mice. The majority (>90%) of non-NMDAR LTP is mediated by Voltage-Dependent Calcium Channels (VDCC), and attempts to block LTP using NMDAR and VDCC antagonists were unsuccessful, indicating 3xTg-AD mice have compensatory mechanisms for LTP expression that occur independently of NMDAR or non-NMDAR dependent mechanisms. In addition, 3xTg-AD mice also showed impairments in short-term synaptic plasticity and basal synaptic transmission at both 3 and 8 months of age. These impairments in synaptic transmission and plasticity coincide with impairments in spatial working memory, and understanding the nature of these altered mechanisms may lead to therapeutic targets for disorders such as AD.
Author: Gong-Ping Liu
Publisher: Frontiers Media SA
ISBN: 2889744841
Category : Science
Languages : en
Pages : 147
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Book Description
Author: Peter Prof. Brennan
Publisher: Elsevier Health Sciences
ISBN: 0702073881
Category : Medical
Languages : en
Pages : 672
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Book Description
Written and edited by expert surgeons in collaboration with a world-renowned anatomist, this exquisitely illustrated reference consolidates surgical, anatomical and technical knowledge for the entire human body in a single volume. Part of the highly respected Gray’s ‘family,’ this new resource brings to life the applied anatomical knowledge that is critically important in the operating room, with a high level of detail to ensure safe and effective surgical practice. Gray’s Surgical Anatomy is unique in the field: effectively a textbook of regional anatomy, a dissection manual, and an atlas of operative procedures – making it an invaluable resource for surgeons and surgical trainees at all levels of experience, as well as students, radiologists, and anatomists. Brings you expert content written by surgeons for surgeons, with all anatomical detail quality assured by Lead Co-Editor and Gray’s Anatomy Editor-in-Chief, Professor Susan Standring. Features superb colour photographs from the operating room, accompanied by detailed explanatory artwork and figures from the latest imaging modalities - plus summary tables, self-assessment questions, and case-based scenarios – making it an ideal reference and learning package for surgeons at all levels. Reflects contemporary practice with chapters logically organized by anatomical region, designed for relevance to surgeons across a wide range of subspecialties, practice types, and clinical settings – and aligned to the requirements of current trainee curricula. Maximizes day-to-day practical application with references to core surgical procedures throughout, as well as the ‘Tips and Anatomical Hazards’ from leading international surgeons. Demonstrates key anatomical features and relationships that are essential for safe surgical practice - using brand-new illustrations, supplemented by carefully selected contemporary artwork from the most recent edition of Gray’s Anatomy and other leading publications. Integrates essential anatomy for robotic and minimal access approaches, including laparoscopic and endoscopic techniques. Features dedicated chapters describing anatomy of lumbar puncture, epidural anaesthesia, peripheral nerve blocks, echocardiographic anatomy of the heart, and endoscopic anatomy of the gastrointestinal tract – as well as a unique overview of human factors and minimizing error in the operating room, essential non-technical skills for improving patient outcomes and safety.
Author: Jesus Avila
Publisher: Frontiers E-books
ISBN: 288919261X
Category : Medicine (General)
Languages : en
Pages : 114
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Book Description
Neurofibrillary tangles (NFTs) composed of intracellular aggregates of tau protein are a key neuropathological feature of Alzheimer’s Disease (AD) and other neurodegenerative diseases, collectively termed tauopathies. The abundance of NFTs has been reported to correlate positively with the severity of cognitive impairment in AD. However, accumulating evidences derived from studies of experimental models have identified that NFTs themselves may not be neurotoxic. Now, many of tau researchers are seeking a “toxic” form of tau protein. Moreover, it was suggested that a “toxic” tau was capable to seed aggregation of native tau protein and to propagate in a prion-like manner. However, the exact neurotoxic tau species remain unclear. Because mature tangles seem to be non-toxic component, “tau oligomers” as the candidate of “toxic” tau have been investigated for more than one decade. In this topic, we will discuss our consensus of “tau oligomers” because the term of “tau oligomers” [e.g. dimer (disulfide bond-dependent or independent), multimer (more than dimer), granular (definition by EM or AFM) and maybe small filamentous aggregates] has been used by each researchers definition. From a biochemical point of view, tau protein has several unique characteristics such as natively unfolded conformation, thermo-stability, acid-stability, and capability of post-translational modifications. Although tau protein research has been continued for a long time, we are still missing the mechanisms of NFT formation. It is unclear how the conversion is occurred from natively unfolded protein to abnormally mis-folded protein. It remains unknown how tau protein can be formed filaments [e.g. paired helical filament (PHF), straight filament and twisted filament] in cells albeit in vitro studies confirmed tau self-assembly by several inducing factors. Researchers are still debating whether tau oligomerization is primary event rather than tau phosphorylation in the tau pathogenesis. Inhibition of either tau phosphorylation or aggregation has been investigated for the prevention of tauopathies, however, it will make an irrelevant result if we don’t know an exact target of neurotoxicity. It is a time to have a consensus of definition, terminology and methodology for the identification of “tau oligomers”.
Author: Miao-Kun Sun
Publisher: Nova Publishers
ISBN: 9781600219603
Category : Medical
Languages : en
Pages : 452
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Book Description
Alzheimer's disease (AD), the most common form of neurodegenerative disorder in the elderly, is characterised pathologically by extracellular amyloid plaques and intracellular neurofibrillary tangles, pathophysiologically by synaptic dysfunction, and clinically by a progressive decline in cognition. Currently, AD has no cure and its prevalence is predicted to triple by 2050 with the rapid increase in the ageing population, unless more effective treatments are developed. Since the publication of the second book volume, the rapid progress in the research fields of AD and dementia continues through the intensive efforts of research scientists worldwide. This third book volume contains 15 chapters, bringing together a presentation of research frontiers in current AD/dementia research. The topics include molecular genetics of AD, gene expression abnormalities in AD progression, presenilins, taupathy in AD, single -induced(neuron gene expression abnormalities in AD, intracellular A neurodegeneration, roles of lipoprotein receptors in AD onset and progression, cholesterol and tau hyperphosphorylation, AD diagnostics and therapeutic strategies, in vivo visualisation of amyloid-like structures, cathepsin B, antiamyloidogenesis and neuroprotection, environmental enrichment, Fragile X mental retardation gene and dementia, category learning in Parkinson's disease, cerebrovascular disease and dementia, and dementia and hypertension. These chapters cover current advances in our understanding of the pathogenic mechanisms underlying AD and dementia, in the diagnosis of early AD and dementia, and in the development of therapeutic agents that target memory-relevant AD pathogenesis. The book will be highly valuable to students and scientists worldwide who are interested in the scientific research progress in AD and dementia.
Author: Jerry J. Buccafusco
Publisher: CRC Press
ISBN: 1420041819
Category : Medical
Languages : en
Pages : 341
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Book Description
Using the most well-studied behavioral analyses of animal subjects to promote a better understanding of the effects of disease and the effects of new therapeutic treatments on human cognition, Methods of Behavior Analysis in Neuroscience provides a reference manual for molecular and cellular research scientists in both academia and the pharmaceutic
Author:
Publisher: Academic Press
ISBN: 0128052910
Category : Medical
Languages : en
Pages : 2517
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Book Description
Learning and Memory: A Comprehensive Reference, Second Edition, Four Volume Set is the authoritative resource for scientists and students interested in all facets of learning and memory. This updated edition includes chapters that reflect the state-of-the-art of research in this area. Coverage of sleep and memory has been significantly expanded, while neuromodulators in memory processing, neurogenesis and epigenetics are also covered in greater detail. New chapters have been included to reflect the massive increase in research into working memory and the educational relevance of memory research. No other reference work covers so wide a territory and in so much depth. Provides the most comprehensive and authoritative resource available on the study of learning and memory and its mechanisms Incorporates the expertise of over 150 outstanding investigators in the field, providing a ‘one-stop’ resource of reputable information from world-leading scholars with easy cross-referencing of related articles to promote understanding and further research Includes further reading for each chapter that helps readers continue their research Includes a glossary of key terms that is helpful for users who are unfamiliar with neuroscience terminology
Author: Dennis J. Selkoe
Publisher: Springer Science & Business Media
ISBN: 3540763309
Category : Medical
Languages : en
Pages : 186
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Book Description
A biochemical hypothesis - that Alzheimer’s disease (AD) is a progressive cerebral amyloidosis caused by the aggregation of the amyloid b-protein (Ab) - preceded and enabled the discovery of etiologies. This volume serves as a record focused on bringing together investigators at the forefront of elucidating the structure and function of hippocampal synapses with investigators focused on understanding how early assemblies of Ab may compromise some of these synapses.
