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Author: Walter J. Fader
Publisher:
ISBN:
Category : Perturbation (Mathematics)
Languages : en
Pages : 44
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Book Description
Author: Walter J. Fader
Publisher:
ISBN:
Category : Perturbation (Mathematics)
Languages : en
Pages : 44
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Book Description
Author: Vijay Kumar
Publisher: Academic Press
ISBN: 0128204400
Category : Medical
Languages : en
Pages : 272
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Book Description
Aggregates of the TAR DNA binding protein 43 (TDP-43), are hallmark features of the neurodegenerative diseases Amyotrophic Lateral Sclerosis (ALS) and frontotemporal dementia (FTD), with overlapping clinical, genetic and pathological features. TDP-43 and Neurodegeneration: From Bench to Bedside summarizes new findings in TDP-43 pathobiology and proteinopathies. The book summarizes TDP-43's structure, function, biology, misfolding, aggregation, pathogenesis and therapeutics. It includes autophagy-mediated therapy, role of stress granule, novel genetic, cell culture-based models, systems biology for precision medicine, development of stem cells and mechanism-based therapies that can target ALS and other related neurodegenerative diseases. This book is written for neuroscientists, neurologists, clinicians, advanced graduate students, drug discovery researchers, as well as cellular and molecular biologists involved in ALS, motor neuron disease (MND) and other neurodegenerative disorders. - Reviews TDP-43 structure, folding, function, and pathology - Identifies TDP-43 role in ALS, FTP, and other neurodegenerative diseases - Presents a systems and precision biology perspective of TDP-43 - Discusses therapeutics of TDP-43 proteinopathies - Translates bench research to application bedside
Author:
Publisher: ScholarlyEditions
ISBN: 146499935X
Category : Medical
Languages : en
Pages : 168
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Book Description
TDP-43 Proteinopathies—Advances in Research and Treatment: 2012 Edition is a ScholarlyEditions™ eBook that delivers timely, authoritative, and comprehensive information about TDP-43 Proteinopathies. The editors have built TDP-43 Proteinopathies—Advances in Research and Treatment: 2012 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about TDP-43 Proteinopathies 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 TDP-43 Proteinopathies—Advances in Research and Treatment: 2012 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/.
Author: Christopher Sackmann
Publisher: Linköping University Electronic Press
ISBN: 917519015X
Category :
Languages : en
Pages : 76
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Book Description
Neurodegenerative diseases such as Alzheimer’s disease (AD), Parkinson’s disease (PD), frontotemporal lobar dementia (FTLD) and amyotrophic lateral sclerosis (ALS) are disorders characterized by the progressive deposition of proteinaceous inclusions throughout the brain in a predictable manner. Each disease is described by the involvement of different misfolded and aggregated proteins (AD, amyloid-? and tau; PD, ?-synuclein; ALS and FTLD, TDP-43) that spread between anatomically connected brain regions, causing cell death in previously healthy regions. Disease progresses as these aggregated proteins spread throughout the brain in a prion-like fashion. Oligomeric forms of these proteins (aggregates comprising of ?3-30 individual proteins) are thought to be the most relevant to disease, as they are capable of prion-like propagation and can cause cellular toxicity. The work in this thesis aims to elucidate the mechanisms by which different neurodegenerative disease related proteins (amyloid-?, ?-synuclein and TDP-43) are taken up and transferred between cells, and the effects exerted by these proteins on downstream cells. Paper I examined the uptake and cell to cell transmission of oligomeric ?-synuclein (?-syn). Using a 3D co-culture model, we determined that ?-syn (monomeric, oligomeric and fibrillar assemblies) were readily taken up and transferred between neuron-like cells, and that this transfer was mediated by an endosomal/lysosomal mechanism. It was also determined that larger ?-syn assemblies (oligomers and fibrils) were found in donor and acceptor cells more frequently than monomeric ?-syn, which we speculate is a due to the larger aggregates’ resistance to cellular proteases. In Paper II, we identified a novel mechanism for the uptake of oligomeric proteins, in the discovery that the gap junction channel protein connexin 32 mediates the uptake of ?-syn oligomers in a preferential manner. Gap junction proteins act as a means of communication between adjacent cells, forming a transmembrane pore to facilitate the passage of small molecules. Here, we determined that connexin 32 drives the preferential uptake of oligomeric ?-syn relative to monomeric and fibrillar ?-syn. This system was not exclusive to ?-syn however, as the preferential uptake of oligomeric amyloid-? (A?) was also observed. In addition to the uptake of oligomers, we observed that increased ?-syn expression elicited the increased expression of connexin 32, in a positive feedback mechanism. When connexin 32 was inhibited pharmacologically or knocked out using CRISPR/Cas9, the preferential uptake of oligomers was abolished. These phenomena were also observed in oligodendrocytes (the accumulation of oligomeric ?-syn in oligodendrocytes is a hallmark of Multiple Systems Atrophy), three different mouse models of ?-syn overexpression, as well as in post-mortem human tissues. Paper III undertook the investigation of cell to cell transfer of TDP-43. Although it was recently confirmed that TDP-43 propagates throughout the brain in a prion-like fashion, it remains unclear how post-translational modifications of TDP-43 affect its propensity to be transferred between cells. This leaves a gap in the understanding of how TDP-43 proteinopathies progress, as post-translationally modified TDP-43 is understood to be critical to pathogenesis. To study this, we generated several TDP-43 cell lines, expressing full-length TDP-43 or C-/N-terminally truncated fragments, known contributors to TDP-43 proteinopathies. Using the 3D co-culture model, we determined that preservation of the N-terminus of TDP-43 enhanced its ability to transmit between cells, whereas an intact the C-terminus reduced transfer. Additionally, since we have previously shown that both oligomeric A? and ?-syn are incorporated into extracellular vesicles (EVs) such as exosomes, and that these EVs can sufficiently mediate the transfer of protein oligomers to downstream cells, we investigated whether this was also true for TDP-43. We demonstrated that full-length TDP-43 and TDP-43 fragments could be found within EVs generated by these cells, but that these EVs were unable to propagate the protein to downstream cells. Instead, the transmission of TDP-43 occurs in a manner dependent upon physical proximity between cells, possibly across the synaptic cleft itself. Next, we studied the acute effects exerted by oligomeric A? upon healthy neurons in order to understand the earliest effects of oligomeric A? challenge. In Paper IV, we used iPSC-derived neurons generated from human donors expressing different amyloid-? precursor protein (APP) genes, one harbouring the familial AD-causing V717I London mutation, the other expressing WT APP. After differentiating these cells into functional neurons in vitro, the neurons were challenged with acute exposure to exogenous oligomeric A? and analyzed by LC-MS/MS to observe the early effects. By analyzing the proteome and phosphoproteome of these cells, we identified many proteins and phosphoproteins that were up- or down-regulated in response to oligomeric A? at this early timepoint. Among these changes, oligomeric A? caused the downregulation of TDP-43, heterogeneous nuclear ribonucleoproteins, and coatomer complex I proteins. Conversely, increases were observed in 20S proteasome subunits and vesicle associated proteins VAMP1/2. We also observed the differential phosphorylation of tau at serine 208, indicating that phosphorylation at this residue might be an important early event in tauopathy. Altogether, the work described in this thesis has provided new understanding as to how different neurodegenerative disease related proteins are taken up and transferred between cells. In doing so, we have identified some of the mechanisms by which this spreading occurs, and that the changes elicited by these toxic oligomeric proteins are rapid and widespread. By learning about these processes, we have identified novel targets that could be used in the development of disease modifying therapeutics.
Author:
Publisher: ScholarlyEditions
ISBN: 1464936412
Category : Medical
Languages : en
Pages : 59
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Book Description
TDP-43 Proteinopathies: Advances in Research and Treatment: 2011 Edition is a ScholarlyBrief™ that delivers timely, authoritative, comprehensive, and specialized information about TDP-43 Proteinopathies in a concise format. The editors have built TDP-43 Proteinopathies: Advances in Research and Treatment: 2011 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about TDP-43 Proteinopathies 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 TDP-43 Proteinopathies: 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/.
Author:
Publisher: DIANE Publishing
ISBN: 1437900046
Category :
Languages : en
Pages : 396
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Book Description
Author: Aaron Ehasz
Publisher: Scholastic Inc.
ISBN: 1338633457
Category : Juvenile Fiction
Languages : en
Pages : 229
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Book Description
With their world on the brink of war, three young heroes from opposite sides of the conflict embark on a dangerous quest that could change everything. This beautiful book expands on the events of Season 1 of the hit Netflix show The Dragon Prince. WAR IS COMING . . . Four full moons past, humans crossed into the magical lands of Xadia and committed an unspeakable crime: They destroyed the only egg of the Dragon King and Queen. Now a young Moonshadow elf assassin has been sent on her first mission; she will make the humans pay for their heinous act. But before she can complete her task, she and two human princes make an astonishing discovery . . . a discovery that could change everything. And so the three reluctant allies set off in a desperate attempt to stop the coming war. Their journey won't be easy, but the trio soon learns that the most serious threat to their quest can't be fought with magic or physical strength. Can these young heroes overcome the longstanding hatred between humans and elves, and restore peace to their world?Written by Aaron Ehasz (co-creator of The Dragon Prince and head writer of Avatar: The Last Airbender) and Melanie McGanney Ehasz, this first canon novel based on the Netflix original series finally gives fans the full story.
Author: Dr. R. K. Thukral
Publisher: Datanet India Pvt. Ltd.
ISBN: 9387415015
Category :
Languages : en
Pages : 16
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Book Description
ANDHRA PRADESH ASSEMBLY FACTBOOK : ACHANTA ASSEMBLY - This book is a special publication of Datanet India and provides Key Electoral Data of ACHANTA Assembly Constituency (1952- 2017). For more about ANDHRA PRADESH Assembly Factbook : ACHANTA Assembly check the Contents section in Sample view.
Author: Varda Shoshan-Barmatz
Publisher: Frontiers Media SA
ISBN: 2889765814
Category : Medical
Languages : en
Pages : 535
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Book Description
Author: James E. Tisdale
Publisher: Academic Press
ISBN: 0128214619
Category : Science
Languages : en
Pages : 378
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Book Description
Over the past 25-30 years, deaths due to Torsades de Pointes (TdP) have resulted in numerous drugs being withdrawn from the market. However, nearly 200 drugs that may prolong the QT interval and cause TdP remain available. A number of drugs with the potential to cause TdP are among the top 200 most prescribed drugs in the US, whilst new information regarding TdP is emerging rapidly. The purpose of this book is to provide a comprehensive source of information on the topic of torsades de pointes (TdP), which is a life-threatening polymorphic ventricular tachyarrhythmia associated with QT interval prolongation on the electrocardiogram (ECG). Torsades de Pointes provides a detailed, up-to-date and emerging information related to the epidemiology, drug culprits, mechanisms, risk factors, and methods of prevention and management of the life-threatening polymorphic ventricular tachycardia, also known as torsades de pointes. The book contains current knowledge, incorporating recent and cutting-edge advances in understanding of topics including inherited channelopathies and congenital LQTS; drugs that cause QT interval prolongation and TdP; non-drug causes of acquired QT interval prolongation and TdP; epidemiology of inherited and acquired TdP; morbidity and mortality associated with TdP, particularly in association with specific antimicrobials, antidepressants and antipsychotics, and methadone; cellular and molecular mechanisms of TdP, traditional and emerging risk factors for TdP; methods of prevention and risk reduction for TdP; and clinical management of patients with TdP. This book is an essential reference for both clinicians and researchers – providing guidance for clinicians who care for patients receiving QT interval-prolonging drugs, as well as cutting edge information for scientists and investigators conducting research in the area. - Up-to-date information on TdP associated with inherited channelopathies and the multiple forms of congenital LQTS - Includes a wealth of new information emerging regarding TdP, including newly-described risk factors and cellular and molecular mechanisms, contributions of genetic polymorphisms to drug-induced TdP, methods of quantification of risk, and methods of risk reduction, including clinical decision support - Contains information on nearly 200 commonly used drugs that have the potential to cause torsades de pointes, including antimicrobials, antipsychotics, antidepressants, antiarrhythmic agents, methadone, and many others - An essential reference for clinicians and researchers – provides guidance for clinicians who care for patients receiving QT interval-prolonging drugs, as well as cutting edge information for scientists and investigators conducting research in the area
