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https://www.readbyqxmd.com/read/28432364/rrm-domain-of-als-ftd-causing-fus-characteristic-of-irreversible-unfolding-spontaneously-self-assembles-into-amyloid-fibrils
#1
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
#2
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...
April 18, 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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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...
April 11, 2017: Protein & Cell
https://www.readbyqxmd.com/read/28396410/spinal-motor-neuron-protein-supersaturation-patterns-are-associated-with-inclusion-body-formation-in-als
#9
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...
April 10, 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
#10
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
https://www.readbyqxmd.com/read/28380257/tdp-43-and-fus-en-route-from-the-nucleus-to-the-cytoplasm
#11
REVIEW
Helena Ederle, Dorothee Dormann
Misfolded or mislocalized RNA-binding proteins (RBPs) and, consequently, altered mRNA processing, can cause neuronal dysfunction, eventually leading to neurodegeneration. Two prominent examples are the RBPs TDP-43 (TAR DNA binding protein of 43 kDa) and FUS (Fused in sarcoma), which form pathological mRNP aggregates in patients suffering from amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD), two devastating neurodegenerative disorders. Here, we review the multiple functions of TDP-43 and FUS in mRNA processing, both in the nucleus and in the cytoplasm...
April 5, 2017: FEBS Letters
https://www.readbyqxmd.com/read/28366453/genetic-correction-of-sod1-mutant-ipscs-reveals-erk-and-jnk-activated-ap1-as-a-driver-of-neurodegeneration-in-amyotrophic-lateral-sclerosis
#12
Akshay Bhinge, Seema C Namboori, Xiaoyu Zhang, Antonius M J VanDongen, Lawrence W Stanton
Although mutations in several genes with diverse functions have been known to cause amyotrophic lateral sclerosis (ALS), it is unknown to what extent causal mutations impinge on common pathways that drive motor neuron (MN)-specific neurodegeneration. In this study, we combined induced pluripotent stem cells-based disease modeling with genome engineering and deep RNA sequencing to identify pathways dysregulated by mutant SOD1 in human MNs. Gene expression profiling and pathway analysis followed by pharmacological screening identified activated ERK and JNK signaling as key drivers of neurodegeneration in mutant SOD1 MNs...
April 11, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/28358904/neurotrophic-effects-of-progranulin-in-vivo-in-reversing-motor-neuron-defects-caused-by-over-or-under-expression-of-tdp-43-or-fus
#13
Babykumari P Chitramuthu, Denis G Kay, Andrew Bateman, Hugh P J Bennett
Progranulin (PGRN) is a glycoprotein with multiple roles in normal and disease states. Mutations within the GRN gene cause frontotemporal lobar degeneration (FTLD). The affected neurons display distinctive TAR DNA binding protein 43 (TDP-43) inclusions. How partial loss of PGRN causes TDP-43 neuropathology is poorly understood. TDP-43 inclusions are also found in affected neurons of patients with other neurodegenerative diseases including amyotrophic lateral sclerosis (ALS) and Alzheimer's disease. In ALS, TDP-43 inclusions are typically also immunoreactive for fused in sarcoma (FUS)...
2017: PloS One
https://www.readbyqxmd.com/read/28358055/fus-affects-circular-rna-expression-in-murine-embryonic-stem-cell-derived-motor-neurons
#14
Lorenzo Errichelli, Stefano Dini Modigliani, Pietro Laneve, Alessio Colantoni, Ivano Legnini, Davide Capauto, Alessandro Rosa, Riccardo De Santis, Rebecca Scarfò, Giovanna Peruzzi, Lei Lu, Elisa Caffarelli, Neil A Shneider, Mariangela Morlando, Irene Bozzoni
The RNA-binding protein FUS participates in several RNA biosynthetic processes and has been linked to the pathogenesis of amyotrophic lateral sclerosis (ALS) and frontotemporal dementia. Here we report that FUS controls back-splicing reactions leading to circular RNA (circRNA) production. We identified circRNAs expressed in in vitro-derived mouse motor neurons (MNs) and determined that the production of a considerable number of these circRNAs is regulated by FUS. Using RNAi and overexpression of wild-type and ALS-associated FUS mutants, we directly correlate the modulation of circRNA biogenesis with alteration of FUS nuclear levels and with putative toxic gain of function activities...
March 30, 2017: Nature Communications
https://www.readbyqxmd.com/read/28342748/rnai-of-arcrna-hsr%C3%AF-affects-sub-cellular-localization-of-drosophila-fus-to-drive-neurodiseases
#15
Luca Lo Piccolo, Masamitsu Yamaguchi
Defective RNA metabolism is common pathogenic mechanisms involved in neurological disorders. Indeed, a conspicuous feature of some neurodegenerative diseases is the loss of nuclear activities of RNA-binding proteins (RBPs) like Fused in sarcoma (FUS) and eventually, their accumulation in cytoplasmic proteinaceous inclusions. Long non-coding RNAs (lncRNAs) are emerging as important regulators of tissue physiology and disease processes, including neurological disorders. A subset of these lncRNAs is the core of nuclear bodies (NBs), which are the sites of RNA processing and sequestration of specific ribonucleoproteins (RNPs) complexes...
March 22, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/28298410/fus-inclusions-disrupt-rna-localization-by-sequestering-kinesin-1-and-inhibiting-microtubule-detyrosination
#16
Kyota Yasuda, Sarah F Clatterbuck-Soper, Meredith E Jackrel, James Shorter, Stavroula Mili
Cytoplasmic inclusions of the RNA-binding protein fused in sarcoma (FUS) represent one type of membraneless ribonucleoprotein compartment. Formation of FUS inclusions is promoted by amyotrophic lateral sclerosis (ALS)-linked mutations, but the cellular functions affected upon inclusion formation are poorly defined. In this study, we find that FUS inclusions lead to the mislocalization of specific RNAs from fibroblast cell protrusions and neuronal axons. This is mediated by recruitment of kinesin-1 mRNA and protein within FUS inclusions, leading to a loss of detyrosinated glutamate (Glu)-microtubules (MTs; Glu-MTs) and an inability to support the localization of RNAs at protrusions...
April 3, 2017: Journal of Cell Biology
https://www.readbyqxmd.com/read/28288521/young-onset-rapidly-progressive-als-associated-with-heterozygous-fus-mutation
#17
Marta Gromicho, Miguel Oliveira Santos, Anabela Pinto, Ana Pronto-Laborinho, Mamede De Carvalho
We report a 36-years-old Cape Verdean man who presented with respiratory insufficiency due to rapidly progressive sporadic amyotrophic lateral sclerosis (ALS), in whom FUS mutation c.1551C > G (p.Hist517Gln) in heterozygosity was identified, a finding previously described as non-pathogenic. The only previous report on this mutation was in a family from Cape Verde in which four members developed ALS; all were homozygous for the mutation. This case shows that this FUS mutation presents a highly variable penetrance and expressivity...
March 13, 2017: Amyotrophic Lateral Sclerosis and Frontotemporal Degeneration
https://www.readbyqxmd.com/read/28282387/the-essential-and-downstream-common-proteins-of-amyotrophic-lateral-sclerosis-a-protein-protein-interaction-network-analysis
#18
Yimin Mao, Su-Wei Kuo, Le Chen, C J Heckman, M C Jiang
Amyotrophic Lateral Sclerosis (ALS) is a devastative neurodegenerative disease characterized by selective loss of motoneurons. While several breakthroughs have been made in identifying ALS genetic defects, the detailed molecular mechanisms are still unclear. These genetic defects involve in numerous biological processes, which converge to a common destiny: motoneuron degeneration. In addition, the common comorbid Frontotemporal Dementia (FTD) further complicates the investigation of ALS etiology. In this study, we aimed to explore the protein-protein interaction network built on known ALS-causative genes to identify essential proteins and common downstream proteins between classical ALS and ALS+FTD (classical ALS + ALS/FTD) groups...
2017: PloS One
https://www.readbyqxmd.com/read/28273913/als-linked-fus-exerts-a-gain-of-toxic-function-involving-aberrant-p38-mapk-activation
#19
Reddy Ranjith K Sama, Claudia Fallini, Rodolfo Gatto, Jeanne E McKeon, Yuyu Song, Melissa S Rotunno, Saul Penaranda, Izrail Abdurakhmanov, John E Landers, Gerardo Morfini, Scott T Brady, Daryl A Bosco
Mutations in Fused in Sarcoma/Translocated in Liposarcoma (FUS) cause familial forms of amyotrophic lateral sclerosis (ALS), a neurodegenerative disease characterized by progressive axonal degeneration mainly affecting motor neurons. Evidence from transgenic mouse models suggests mutant forms of FUS exert an unknown gain-of-toxic function in motor neurons, but mechanisms underlying this effect remain unknown. Towards this end, we studied the effect of wild type FUS (FUS WT) and three ALS-linked variants (G230C, R521G and R495X) on fast axonal transport (FAT), a cellular process critical for appropriate maintenance of axonal connectivity...
December 2017: Scientific Reports
https://www.readbyqxmd.com/read/28265061/amyotrophic-lateral-sclerosis-linked-mutations-increase-the-viscosity-of-liquid-like-tdp-43-rnp-granules-in-neurons
#20
Pallavi P Gopal, Jeffrey J Nirschl, Eva Klinman, Erika L F Holzbaur
Ribonucleoprotein (RNP) granules are enriched in specific RNAs and RNA-binding proteins (RBPs) and mediate critical cellular processes. Purified RBPs form liquid droplets in vitro through liquid-liquid phase separation and liquid-like non-membrane-bound structures in cells. Mutations in the human RBPs TAR-DNA binding protein 43 (TDP-43) and RNA-binding protein FUS cause amyotrophic lateral sclerosis (ALS), but the biophysical properties of these proteins have not yet been studied in neurons. Here, we show that TDP-43 RNP granules in axons of rodent primary cortical neurons display liquid-like properties, including fusion with rapid relaxation to circular shape, shear stress-induced deformation, and rapid fluorescence recovery after photobleaching...
March 21, 2017: Proceedings of the National Academy of Sciences of the United States of America
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