Download or read book Characterization of Toxic Abeta Oligomers ADDLs Amyloid beta derived Diffusible Ligands written by Brett A. Chromy and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Alzheimer's disease is a neurodegenerative disorder that afflicts over 25 million people worldwide and currently has no cure. The amyloid beta peptide (Abeta) is believed to be causative in the disease, but the exact form of the peptide responsible is unknown. The prevailing theory for Abeta toxicity is that innocuous monomer must reorganize into larger structures and form fibrils in order to be toxic. Recently, pre-fibrillar forms of the peptide have been discovered and are gaining in prominence as possible critical toxic structural species. We have discovered one of these pre-fibrillar forms of amyloid beta and have named them, ADDLs (Amyloid-beta-derived diffusible ligands). These structures are individual, globular, oligomeric species and are structurally distinct from other pre-fibrillar structures, such as rings, protofibrils, or micelles. We have designed several polyclonal antibodies to investigate these oligomers. Atomic force microscopy (AFM) and gel electrophoresis techniques have established the structure of the molecules. ADDLs have been demonstrated to block LTP, a model for learning and memory. It may be through this process that ADDLs exert their effect on the human brain and elicit the symptoms of AD. Moreover, the LTP and toxic effects of ADDLs are dependent upon the presence of Fyn, a Src-family tyrosine kinase, shown to be upregulated in AD. We have generated Fyn containing cell lines to examine the effects of Fyn more closely. Fyn has also been shown to phosphorylate tau, which is the main component of the other 'hallmark' of AD, the presence of paired helical filaments (PHFs) inside neurons of AD-afflicted brains. Although ADDLs have not been shown to conclusively elicit apoptosis, we have shown that perturbations in the microtubule network induce neuronal apoptosis through an unknown tyrosine kinase, possibly involving the Fyn-dependent signal transduction mechanism used by ADDLs. Apoptosis may play a role in how neurons die in AD, and disruption of the microtubule system through protein tyrosine phosphorylation may play a role in the apoptosis. ADDLs, Fyn, and protein tyrosine phosphorylation may represent central aspects of the cause of AD and further examination of these topics may eventually lead to a cure for this devastating disease.
Download or read book Tau oligomers written by Jesus Avila and published by Frontiers E-books. This book was released on 2014-08-18 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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”.
Download or read book Apolipoprotein E and Alzheimer s Disease written by A.D. Roses and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2002 with total page 972 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Medicinal Plants and Fungi Recent Advances in Research and Development written by Dinesh Chandra Agrawal and published by Springer. This book was released on 2017-11-03 with total page 557 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights the latest international research on different aspects of medicinal plants and fungi. Studies over the last decade have demonstrated that bioactive compounds isolated from medicinal fungi have promising antitumor, cardiovascular, immunomodulatory, anti-allergic, anti-diabetic, and hepatoprotective properties. In the light of these studies, the book includes chapters (mostly review articles) by eminent researchers from twelve countries across the globe working in different disciplines of medicinal plants and fungi. It discusses topics such as the prevention of major neurodegenerative and neurotoxic mechanisms by Centella asiatica; the medicinal properties and therapeutic applications of several mushrooms species found in different parts of the world; and fungal endophytes as a source of bioactive metabolites including anticancer and cardioprotective agents. There are also chapters on strategies for identifying bioactive secondary metabolites of fungal origin; the use of genomic information to explore the biotechnological potential of medicinal mushrooms; and solid state fermentation of agro-industrial and forestry residues for the production of medicinal mushrooms. It is a valuable resource for the researchers, professionals and students working in the area of medicinal plants and fungi.
Download or read book Role of the Mediterranean Diet in the Brain and Neurodegenerative Diseases written by Tahira Farooqui and published by Academic Press. This book was released on 2017-10-24 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt: Role of the Mediterranean Diet in the Brain and Neurodegenerative Disease provides a comprehensive overview of the effects of all components of the Mediterranean diet on the brain, along with its beneficial effects in neurodegenerative diseases. It covers topics on neurodegenerative diseases (Alzheimer disease (AD), Parkinson disease, (PD) Huntington disease (HD) and Amyotrophic Lateral Sclerosis (ALS), also providing information on how cardiovascular disease, Type 2 Diabetes, and Metabolic Syndrome become risk factors for neurodegenerative diseases. This book focuses on how the Mediterranean diet suppresses oxidative stress and neuroinflammation in neurodegenerative diseases as well as signal transduction. The Mediterranean diet is characterized by the abundant consumption of olive oil, high consumption of plant foods (fruits, vegetables, pulses, cereals, nuts and seeds); frequent and moderate intake of wine (mainly with meals); moderate consumption of fish, seafood, yogurt, cheese, poultry and eggs; and low consumption of red meat and processed meat products. High consumption of dietary fiber, low glycemic index and glycemic load, anti-inflammatory effects, and antioxidant compounds may act together to produce favorable effects on health status. Collective evidence suggests that Mediterranean diet not only increases longevity by lowering cardiovascular disease, inhibiting cancer growth, but also by protecting the body from age-dependent cognitive decline. Comprehensively provides an overview of the effects of the Mediterranean diet on the brain and its beneficial effects in neurodegenerative diseases Discusses the relationship among Type 2 Diabetes, Metabolic Syndrome and Alzheimer's Disease, and the effect of the Mediterranean diet on normal aging, longevity, and other neurodegenerative diseases Focuses on how the Mediterranean diet suppresses oxidative stress and neuroinflammation in neurodegenerative disease
Download or read book The Sea Urchin Embryo written by G. Giudice and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book should be regarded as the continuation to my previous book Developmental Biology of the Sea Urchin Embryo, edited by the Academic Press in 1973, rather than as a new edition. Due to the exceedingly high rate of development in this field (something like 2000 papers have been published on this subject in these last 10 years), I preferred, in fact, not to describe again in detail the enormous amount of the old literature, as was attempted in my previous book, but to briefly summarize the state of the art in each problem and to describe in some detail the experiments per formed in the last 12 years. In doing so, more emphasis was given to the more recent ones and to those which can be considered as corner stones in each subject. Care was, however, taken to mention the reviews or key papers in which the reader can find a source of the details of the older literature, besides refering him to my previous book.
Download or read book Molecular Biology of Neurodegenerative Diseases written by David B. Teplow and published by Academic Press. This book was released on 2012-04-13 with total page 499 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neurodegenerative diseases result in progressive degeneration and / or death of nerve cells which leads to problems with movement and mental functioning. Examples include Parkinson's, Alzheimer's and Huntington's disease. Much research is taking place to try to identify ways to prevent or lessen the impact of these diseases. This volume reviews the latest research and developments in the molecular biology of neurodegenerative diseases. Contributions from leading authorities Informs and updates on all the latest developments in the field
Download or read book Trends in Alzheimer s Disease Research written by Eileen M. Welsh and published by Nova Publishers. This book was released on 2006 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dementia is a brain disorder that seriously affects a person's ability to carry out daily activities. The most common form of dementia among older people is Alzheimer's Disease (AD), which involves the parts of the brain that control memory, thought and language. Age is the most important known risk factor for AD. The number of people with the disease doubles every 5 years beyond age 65. AD is a slow disease, starting with mild memory loss and ending with severe brain damage. The course the disease takes and how fast changes occur vary from person to person. On average, AD patients live from 8 to 10 years after they are diagnosed, though the disease can last for as many as 20 years. Current research is aimed at understanding why AD occurs and who is at greatest risk for developing it, improving the accuracy of diagnosis and ability to identify who is at risk, developing, discovering and testing new treatments for behavioural problems in patients with AD. This book gathers state-of-the-art research from leading scientists throughout the world which offers important information on understanding the underlying causes and discovering the most effective treatments for Alzheimer's Disease.
Download or read book Mental Disorders Advances in Research and Treatment 2011 Edition written by and published by ScholarlyEditions. This book was released on 2012-01-09 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mental Disorders: Advances in Research and Treatment: 2011 Edition is a ScholarlyEditions™ eBook that delivers timely, authoritative, and comprehensive information about Mental Disorders. The editors have built Mental Disorders: Advances in Research and Treatment: 2011 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Mental Disorders in this eBook to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Mental Disorders: Advances in Research and Treatment: 2011 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.
Download or read book Studies on Experimental Models written by Samar Basu and published by Springer Science & Business Media. This book was released on 2011-04-13 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is a widespread consensus that use of antioxidants as a therapeutic approach may counteract free radical mediated pathologies. However, the role of antioxidants in normal physiology and redox signaling is still in its infancy. Since oxidative stress is related to various diseases and pathologies, scientists are eager to study the disease in humans, but it is not always ethical to study all the aspects of the disease in humans. Thus, it becomes mandatory to study the disease process and the mechanisms behind it through experimental models which generally involve animals, in vitro/cell culture studies, primates and even humans to a certain extent. Studies on Experimental Models contains data on the experimental models or review of such models of oxidative stress in various diseases. It is structured into six sections, which are as follows: diabetes, cardiovascular, neurology, ocular diseases, toxicology/environmental and in vitro/tissue culture. Each section presents a sketch of models in humans, animals and in vitro methods. Taken together, they comprise a valuable reference for basic and clinical scientists, one aimed at contributing to the advancement of oxidative stress research using appropriate animal models.
Download or read book Intrinsically Disordered Proteins Studied by NMR Spectroscopy written by Isabella C. Felli and published by Springer. This book was released on 2015-09-19 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses the paradigm-shifting phenomenon of intrinsically disordered proteins (IDPs) and hybrid proteins containing ordered domains and functional IDP regions (IDPRs). The properties of IDPs and IDPRs are highly complementary to those deriving from the presence of a unique and well-defined three-dimensional fold. Ignored for a long time in high-resolution studies of proteins, intrinsic protein disorder is now recognized as one of the key features for a large variety of cellular functions, where structural flexibility presents a functional advantage in terms of binding plasticity and promiscuity and this volume explores this exciting new research. Recent progress in the field has radically changed our perspective to study IDPs through NMR: increasingly complex IDPs can now be characterized, a wide range of observables can be determined reporting on the structural and dynamic properties, computational methods to describe the structure and dynamics are in continuous development and IDPs can be studied in environments as complex as whole cells. This volume communicates the new exciting possibilities offered by NMR and presents open questions to foster further developments. Intrinsically Disordered Proteins Studied by NMR Spectroscopy provides a snapshot to researchers entering the field as well as providing a current overview for more experienced scientists in related areas.
Download or read book Sea Urchin written by Maria Agnello and published by BoD – Books on Demand. This book was released on 2017-10-04 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is addressed to the readers operating in the sea urchin field of research, as well as to the lovers of this fascinating organism. Sea urchin, among the most known marine invertebrates belonging to the deuterostomes, is more closely related to humans than other invertebrates, thus representing a suitable model system not only for developmental biology and ecotoxicology but also for biomedicine. The topics described highlight the validity and versatility of this organism for different kinds of investigations. A collection of interesting chapters contributes to this volume and clearly shows the reason of the high interest manifested by a huge number of scientists around the world for this organism over time. Each contribution is a separate and comprehensive chapter but within the book's aim.
Download or read book Alzheimer s Disease Pathogenesis written by Suzanne De La Monte and published by BoD – Books on Demand. This book was released on 2011-09-12 with total page 706 pages. Available in PDF, EPUB and Kindle. Book excerpt: Alzheimer's Disease Pathogenesis: Core Concepts, Shifting Paradigms, and Therapeutic Targets, delivers the concepts embodied within its title. This exciting book presents the full array of theories about the causes of Alzheimer's, including fresh concepts that have gained ground among both professionals and the lay public. Acknowledged experts provide highly informative yet critical reviews of the factors that most likely contribute to Alzheimer's, including genetics, metabolic deficiencies, oxidative stress, and possibly environmental exposures. Evidence that Alzheimer's resembles a brain form of diabetes is discussed from different perspectives, ranging from disease mechanisms to therapeutics. This book is further energized by discussions of how neurotransmitter deficits, neuro-inflammation, and oxidative stress impair neuronal plasticity and contribute to Alzheimer's neurodegeneration. The diversity of topics presented in just the right depth will interest clinicians and researchers alike. This book inspires confidence that effective treatments could be developed based upon the expanding list of potential therapeutic targets.
Download or read book Alzheimer s and Parkinson s Diseases written by Abraham Fisher and published by Karger Medical and Scientific Publishers. This book was released on 2007 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: This issue is a dedicated supplement published in addition to the regular issues of 'Neurodegenerative Diseases' containing congress abstracts. 'Neurodegenerative Diseases' is a well-respected, international peer-reviewed journal in Neurology. Supplement issues are included in the subscription.
Download or read book Molecular Chaperones and Neurodegeneration written by Cintia Roodveldt and published by Frontiers Media SA. This book was released on 2017-12-06 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: Molecular chaperones or heat-shock proteins (HSPs) play essential roles in safeguarding structural stability and preventing misfolding and aggregation of proteins, and maintaining the proteome functionality in the cell. For over two decades until the present time, new functions have been discovered and several molecular mechanisms have been elucidated for many chaperones, while the field is being continuously challenged by new open questions. Probably as a consequence of the increasing research on the molecular bases of neurodegenerative diseases, and the realisation that many such disorders are linked to protein misfolding processes, unleashing the roles and mechanisms of chaperones in the context of neurodegeneration has become a prime scientific goal. This e-book contains a diversity of reviews, perspective and original research articles highlighting the importance and potential of this emerging subject.
