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https://www.readbyqxmd.com/read/28622300/the-als-linked-e102q-mutation-in-sigma-receptor-1-leads-to-er-stress-mediated-defects-in-protein-homeostasis-and-dysregulation-of-rna-binding-proteins
#1
Alice Dreser, Jan Tilmann Vollrath, Antonio Sechi, Sonja Johann, Andreas Roos, Alfred Yamoah, Istvan Katona, Saeed Bohlega, Dominik Wiemuth, Yuemin Tian, Axel Schmidt, Jörg Vervoorts, Marc Dohmen, Cordian Beyer, Jasper Anink, Eleonora Aronica, Dirk Troost, Joachim Weis, Anand Goswami
Amyotrophic lateral sclerosis (ALS) is characterized by the selective degeneration of motor neurons (MNs) and their target muscles. Misfolded proteins which often form intracellular aggregates are a pathological hallmark of ALS. Disruption of the functional interplay between protein degradation (ubiquitin proteasome system and autophagy) and RNA-binding protein homeostasis has recently been suggested as an integrated model that merges several ALS-associated proteins into a common pathophysiological pathway...
June 16, 2017: Cell Death and Differentiation
https://www.readbyqxmd.com/read/28620838/modelling-fus-mislocalisation-in-an-in-vitro-model-of-innervated-human-muscle
#2
Sonja Prpar Mihevc, Mojca Pavlin, Simona Darovic, Marko Živin, Matej Podbregar, Boris Rogelj, Tomaz Mars
Degeneration of distal axons and neuromuscular junctions is an early feature in the pathology of amyotrophic lateral sclerosis (ALS), which culminates in motor neuron loss due to axon retraction and muscle atrophy. The complex interactions in the pathogenesis of ALS between motor neurons, muscle cells and accompanying glia require an appropriate experimental model. Here, we have defined a co-culture model based on human myotubes innervated by neurons from embryonic rat spinal cord explants to investigate the pathology and treatment of ALS...
June 15, 2017: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28620717/multiple-variants-in-families-with-amyotrophic-lateral-sclerosis-and-frontotemporal-dementia-related-to-c9orf72-repeat-expansion-further-observations-on-their-oligogenic-nature
#3
Maria Pia Giannoccaro, Anna Bartoletti-Stella, Silvia Piras, Annalisa Pession, Patrizia De Massis, Federico Oppi, Michelangelo Stanzani-Maserati, Elena Pasini, Simone Baiardi, Patrizia Avoni, Piero Parchi, Rocco Liguori, Sabina Capellari
The C9orf72 repeat expansion (RE) is one of the most frequent causative mutations of amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD). However, it is still unclear how the C9orf72 RE can lead to a heterogeneous phenotype. Several reports have shown the coexistence of mutations in multiple ALS/FTD causative genes in the same family, suggesting an oligogenic etiology for ALS and FTD. Our aim was to investigate this phenomenon in an Italian group of ALS/FTD pedigrees carrying the C9orf72 RE...
June 15, 2017: Journal of Neurology
https://www.readbyqxmd.com/read/28608264/the-small-heat-shock-protein-b8-hspb8-efficiently-removes-aggregating-species-of-dipeptides-produced-in-c9orf72-related-neurodegenerative-diseases
#4
Riccardo Cristofani, Valeria Crippa, Giulia Vezzoli, Paola Rusmini, Mariarita Galbiati, Maria Elena Cicardi, Marco Meroni, Veronica Ferrari, Barbara Tedesco, Margherita Piccolella, Elio Messi, Serena Carra, Angelo Poletti
Amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD) are two neurodegenerative diseases in which similar pathogenic mechanisms are involved. Both diseases associate to the high propensity of specific misfolded proteins, like TDP-43 or FUS, to mislocalize and aggregate. This is partly due to their intrinsic biophysical properties and partly as a consequence of failure of the neuronal protein quality control (PQC) system. Several familial ALS/FTD cases are linked to an expansion of a repeated G4C2 hexanucleotide sequence present in the C9ORF72 gene...
June 12, 2017: Cell Stress & Chaperones
https://www.readbyqxmd.com/read/28549443/quantitative-analysis-of-cryptic-splicing-associated-with-tdp-43-depletion
#5
Jack Humphrey, Warren Emmett, Pietro Fratta, Adrian M Isaacs, Vincent Plagnol
BACKGROUND: Reliable exon recognition is key to the splicing of pre-mRNAs into mature mRNAs. TDP-43 is an RNA-binding protein whose nuclear loss and cytoplasmic aggregation are a hallmark pathology in amyotrophic lateral sclerosis and frontotemporal dementia (ALS/FTD). TDP-43 depletion causes the aberrant inclusion of cryptic exons into a range of transcripts, but their extent, relevance to disease pathogenesis and whether they are caused by other RNA-binding proteins implicated in ALS/FTD are unknown...
May 26, 2017: BMC Medical Genomics
https://www.readbyqxmd.com/read/28515487/functional-interaction-between-fus-and-smn-underlies-sma-like-splicing-changes-in-wild-type-hfus-mice
#6
Alessia Mirra, Simona Rossi, Silvia Scaricamazza, Michela Di Salvio, Illari Salvatori, Cristiana Valle, Paola Rusmini, Angelo Poletti, Gianluca Cestra, Maria Teresa Carrì, Maur O Cozzolino
Several of the identified genetic factors in Amyotrophic Lateral Sclerosis (ALS) point to dysfunction in RNA processing as a major pathogenic mechanism. However, whether a precise RNA pathway is particularly affected remains unknown. Evidence suggests that FUS, that is mutated in familial ALS, and SMN, the causative factor in Spinal Muscular Atrophy (SMA), cooperate to the same molecular pathway, i.e. regulation of alternative splicing, and that disturbances in SMN-regulated functions, either caused by depletion of SMN protein (as in the case of SMA) or by pathogenic interactions between FUS and SMN (as in the case of ALS) might be a common theme in both diseases...
May 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28468939/modelling-amyotrophic-lateral-sclerosis-progress-and-possibilities
#7
REVIEW
Philip Van Damme, Wim Robberecht, Ludo Van Den Bosch
Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disorder that primarily affects the motor system and presents with progressive muscle weakness. Most patients survive for only 2-5 years after disease onset, often due to failure of the respiratory muscles. ALS is a familial disease in ∼10% of patients, with the remaining 90% developing sporadic ALS. Over the past decade, major advances have been made in our understanding of the genetics and neuropathology of ALS. To date, around 20 genes are associated with ALS, with the most common causes of typical ALS associated with mutations in SOD1, TARDBP, FUS and C9orf72 Advances in our understanding of the genetic basis of ALS have led to the creation of different models of this disease...
May 1, 2017: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/28453527/altered-nucleocytoplasmic-proteome-and-transcriptome-distributions-in-an-in-vitro-model-of-amyotrophic-lateral-sclerosis
#8
Jee-Eun Kim, Yoon Ho Hong, Jin Young Kim, Gye Sun Jeon, Jung Hee Jung, Byung-Nam Yoon, Sung-Yeon Son, Kwang-Woo Lee, Jong-Il Kim, Jung-Joon Sung
Aberrant nucleocytoplasmic localization of proteins has been implicated in many neurodegenerative diseases. Evidence suggests that cytoplasmic mislocalization of nuclear proteins such as transactive response DNA-binding protein 43 (TDP-43) and fused in sarcoma (FUS) may be associated with neurotoxicity in amyotrophic lateral sclerosis (ALS) and frontotemporal lobar degeneration. This study investigated the changes in nucleocytoplasmic distributions of the proteome and transcriptome in an in vitro model of ALS...
2017: PloS One
https://www.readbyqxmd.com/read/28444573/the-effect-of-different-types-of-nanoparticles-on-fus-and-tdp-43-solubility-and-subcellular-localization
#9
Jasna Lojk, Sonja Prpar Mihevc, Vladimir Boštjan Bregar, Mojca Pavlin, Boris Rogelj
Increased environmental pollution has been suggested as one of the possible causes for increased incidence of neurodegenerative and developmental disorders. Through the environmental pollution, everyday consumer products and nanomedical applications, we are also exposed to various nanoparticles (NPs). Specific types of NPs have been shown to be able to cause neural damage in vivo through processes such as disruption of the blood-brain barrier, induction of neuroinflammation, increase in oxidative stress and protein aggregation...
April 25, 2017: Neurotoxicity Research
https://www.readbyqxmd.com/read/28444446/comparison-of-the-clinical-and-cognitive-features-of-genetically-positive-als-patients-from-the-largest-tertiary-center-in-serbia
#10
Ivan V Marjanović, Biljana Selak-Djokić, Stojan Perić, Milena Janković, Vladimir Arsenijević, Ivana Basta, Dragana Lavrnić, Elka Stefanova, Zorica Stević
Discovering novel mutations in C9orf72, FUS, ANG, and TDP-43 genes in ALS patients arises necessities for better clinical characterizations of these subjects. The aim is to determine clinical and cognitive profile of genetically positive Serbian ALS patients. 241 ALS patients were included in the study (17 familiar and 224 apparently sporadic). The following genes were analyzed: SOD1, C9orf72, ANG, FUS, and TDP-43. An extensive battery of classic neuropsychological tests was used in 27 ALS patients (22 SOD1 positive and 5 SOD1 negative) and 82 healthy controls (HCs)...
June 2017: Journal of Neurology
https://www.readbyqxmd.com/read/28432364/rrm-domain-of-als-ftd-causing-fus-characteristic-of-irreversible-unfolding-spontaneously-self-assembles-into-amyloid-fibrils
#11
Yimei Lu, Liangzhong Lim, Jianxing Song
526-residue FUS functions to self-assemble into reversible droplets/hydrogels, which could be further solidified into pathological fibrils. FUS is intrinsically prone to aggregation, composed of N-terminal low-sequence complexity (LC); RNA-recognition motif (RRM) and C-terminal LC domains. Intriguingly, previous in vivo studies revealed that its RRM is required for manifesting FUS cytotoxicity but the underlying mechanism remains unknown. Here, we characterized solution conformations of FUS and its five differentially dissected fragments, followed by detailed investigations on thermal unfolding, NMR dynamics and self-assembly of RRM...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28430856/a-comprehensive-analysis-of-rare-genetic-variation-in-amyotrophic-lateral-sclerosis-in-the-uk
#12
Sarah Morgan, Aleksey Shatunov, William Sproviero, Ashley R Jones, Maryam Shoai, Deborah Hughes, Ahmad Al Khleifat, Andrea Malaspina, Karen E Morrison, Pamela J Shaw, Christopher E Shaw, Katie Sidle, Richard W Orrell, Pietro Fratta, John Hardy, Alan Pittman, Ammar Al-Chalabi
Amyotrophic lateral sclerosis is a progressive neurodegenerative disease of motor neurons. About 25 genes have been verified as relevant to the disease process, with rare and common variation implicated. We used next generation sequencing and repeat sizing to comprehensively assay genetic variation in a panel of known amyotrophic lateral sclerosis genes in 1126 patient samples and 613 controls. About 10% of patients were predicted to carry a pathological expansion of the C9orf72 gene. We found an increased burden of rare variants in patients within the untranslated regions of known disease-causing genes, driven by SOD1, TARDBP, FUS, VCP, OPTN and UBQLN2...
June 1, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28429524/the-investigation-of-genetic-and-clinical-features-in-chinese-patients-with-juvenile-amyotrophic-lateral-sclerosis
#13
Z-J Liu, H-X Lin, G-L Liu, Q-Q Tao, W Ni, B-G Xiao, Z-Y Wu
Juvenile amyotrophic lateral sclerosis (JALS) occurs at an age of onset below 25 years with a heterogeneous disease onset location, variable progression and survival time. To investigate whether an ALS gene profile could resolve any aspects of clinical symptom heterogeneity, we have used targeted sequencing technology in a cohort of 12 JALS patients of Chinese descent. We detected 5 likely pathogenic mutations, 2 in familial probands and 3 in sporadic patients. One was a known TARDBP mutation (p.G348V) and 4 were FUS frameshift mutations including a known p...
March 16, 2017: Clinical Genetics
https://www.readbyqxmd.com/read/28429234/neuron-to-neuron-transfer-of-fus-in-drosophila-primary-neuronal-culture-is-enhanced-by-als-associated-mutations
#14
Sébastien Feuillette, Morgane Delarue, Gaëtan Riou, Anne-Lise Gaffuri, Jane Wu, Zsolt Lenkei, Olivier Boyer, Thierry Frébourg, Dominique Campion, Magalie Lecourtois
The DNA- and RNA-binding protein fused in sarcoma (FUS) has been pathologically and genetically linked to amyotrophic lateral sclerosis (ALS) or frontotemporal lobar degeneration (FTLD). Cytoplasmic FUS-positive inclusions were identified in the brain and spinal cord of a subset of patients suffering with ALS/FTLD. An increasing number of reports suggest that FUS protein can behave in a prion-like manner. However, no neuropathological studies or experimental data were available regarding cell-to-cell spread of these pathological protein assemblies...
April 20, 2017: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28424484/the-tandem-agenet-domain-of-fragile-x-mental-retardation-protein-interacts-with-fus
#15
Qingzhong He, Wei Ge
The tandem Agenet domain (TAD) of fragile X mental retardation protein (FMRP) protein is considered to be a member of the methyl-lysine-binding Tudor domain "Royal family". Several groups have reported that the TAD binds with methylated histones and plays a role in DNA damage responses. FMRP is a RNA-binding protein predominantly resident in cytoplasm. Therefore, in this study, we identified DDX5, FUS, EWSR1 and LSM14A as TAD-interacting proteins sensitive to F32L and/or Y96L mutation by pull-down assays and mass spectrometry...
April 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28421535/microrna-metabolism-and-dysregulation-in-amyotrophic-lateral-sclerosis
#16
REVIEW
Paola Rinchetti, Mafalda Rizzuti, Irene Faravelli, Stefania Corti
MicroRNAs (miRNAs) are a subset of endogenous, small, non-coding RNA molecules involved in the post-transcriptional regulation of eukaryotic gene expression. Dysregulation in miRNA-related pathways in the central nervous system (CNS) is associated with severe neuronal injury and cell death, which can lead to the development of neurodegenerative disorders, such as amyotrophic lateral sclerosis (ALS). ALS is a fatal adult onset disease characterized by the selective loss of upper and lower motor neurons. While the pathogenesis of ALS is still largely unknown, familial ALS forms linked to TAR DNA-binding protein 43 (TDP-43) and fused in sarcoma (FUS) gene mutations, as well as sporadic forms, display changes in several steps of RNA metabolism, including miRNA processing...
April 18, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28413711/high-throughput-sequencing-revealed-a-novel-setx-mutation-in-a-hungarian-patient-with-amyotrophic-lateral-sclerosis
#17
Kornélia Tripolszki, Dóra Török, David Goudenège, Katalin Farkas, Adrienn Sulák, Nóra Török, József I Engelhardt, Péter Klivényi, Vincent Procaccio, Nikoletta Nagy, Márta Széll
BACKGROUND: Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disease characterized by the degeneration of the motor neurons. To date, 126 genes have been implicated in ALS. Therefore, the heterogenous genetic background of ALS requires comprehensive genetic investigative approaches. METHODS: In this study, DNA from 28 Hungarian ALS patients was subjected to targeted high-throughput sequencing of the coding regions of three Mendelian ALS genes: FUS, SETX, and C9ORF72...
April 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28401346/crispr-cas9-mediated-targeted-gene-correction-in-amyotrophic-lateral-sclerosis-patient-ipscs
#18
Lixia Wang, Fei Yi, Lina Fu, Jiping Yang, Si Wang, Zhaoxia Wang, Keiichiro Suzuki, Liang Sun, Xiuling Xu, Yang Yu, Jie Qiao, Juan Carlos Izpisua Belmonte, Ze Yang, Yun Yuan, Jing Qu, Guang-Hui Liu
Amyotrophic lateral sclerosis (ALS) is a complex neurodegenerative disease with cellular and molecular mechanisms yet to be fully described. Mutations in a number of genes including SOD1 and FUS are associated with familial ALS. Here we report the generation of induced pluripotent stem cells (iPSCs) from fibroblasts of familial ALS patients bearing SOD1 (+/A272C) and FUS (+/G1566A) mutations, respectively. We further generated gene corrected ALS iPSCs using CRISPR/Cas9 system. Genome-wide RNA sequencing (RNA-seq) analysis of motor neurons derived from SOD1 (+/A272C) and corrected iPSCs revealed 899 aberrant transcripts...
May 2017: Protein & Cell
https://www.readbyqxmd.com/read/28396410/spinal-motor-neuron-protein-supersaturation-patterns-are-associated-with-inclusion-body-formation-in-als
#19
Prajwal Ciryam, Isabella A Lambert-Smith, Daniel M Bean, Rosie Freer, Fernando Cid, Gian Gaetano Tartaglia, Darren N Saunders, Mark R Wilson, Stephen G Oliver, Richard I Morimoto, Christopher M Dobson, Michele Vendruscolo, Giorgio Favrin, Justin J Yerbury
Amyotrophic lateral sclerosis (ALS) is a heterogeneous degenerative motor neuron disease linked to numerous genetic mutations in apparently unrelated proteins. These proteins, including SOD1, TDP-43, and FUS, are highly aggregation-prone and form a variety of intracellular inclusion bodies that are characteristic of different neuropathological subtypes of the disease. Contained within these inclusions are a variety of proteins that do not share obvious characteristics other than coaggregation. However, recent evidence from other neurodegenerative disorders suggests that disease-affected biochemical pathways can be characterized by the presence of proteins that are supersaturated, with cellular concentrations significantly greater than their solubilities...
May 16, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28389532/rna-binding-proteins-with-prion-like-domains-in-health-and-disease
#20
REVIEW
Alice Ford Harrison, James Shorter
Approximately 70 human RNA-binding proteins (RBPs) contain a prion-like domain (PrLD). PrLDs are low-complexity domains that possess a similar amino acid composition to prion domains in yeast, which enable several proteins, including Sup35 and Rnq1, to form infectious conformers, termed prions. In humans, PrLDs contribute to RBP function and enable RBPs to undergo liquid-liquid phase transitions that underlie the biogenesis of various membraneless organelles. However, this activity appears to render RBPs prone to misfolding and aggregation connected to neurodegenerative disease...
April 7, 2017: Biochemical Journal
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