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Hereditary spastic paraplegia

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https://www.readbyqxmd.com/read/29779933/-hereditary-optic-neuropathies-in-pediatric-ophthalmology
#1
C Orssaud, M P Robert, D Bremond Gignac
INTRODUCTION: Hereditary optic neuropathies (HON) often begin in adulthood. However, some of them can have an early onset. These may have specific clinical features and natural histories. PATIENTS AND METHODS: Retrospective study of HON patients with onset before the age of 14 years seen in a referral center. In addition to the age of onset, we evaluated the genetic etiology, visual acuity at 15 years, last best corrected visual acuity, optic disc appearance, visual field and extra-ophthalmological manifestations...
May 17, 2018: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/29767817/-motor-neuron-diseases-clinical-and-genetic-differential-diagnostics
#2
REVIEW
M Regensburger, N Weidner, Z Kohl
The causes of degenerative disease of the upper and lower motor neurons are incompletely understood. In this review the current concepts in the clinical and genetic differential diagnostics of motor neuron diseases are presented. Hereditary spastic paraplegia, primary lateral sclerosis, spinal muscular atrophy and amyotrophic lateral sclerosis are explained, structured according to the affection of the upper and/or lower motor neuron. The substantial variability in the presentation and course of motor neuron diseases as well as the lack of specific laboratory tests hinder an early diagnosis...
May 16, 2018: Der Nervenarzt
https://www.readbyqxmd.com/read/29754261/compound-heterozygous-mutations-in-two-different-domains-of-aldh18a1-do-not-affect-the-amino-acid-levels-in-a-patient-with-hereditary-spastic-paraplegia
#3
Maria Steenhof, Maria Kibæk, Martin J Larsen, Mette Christensen, Allan Meldgaard Lund, Klaus Brusgaard, Jens Michael Hertz
Mutations in ALDH18A1 can cause autosomal recessive and dominant hereditary spastic paraplegia and autosomal recessive and dominant cutis laxa. ALDH18A1 encodes delta-1-pyrroline-5-carboxylate synthetase (P5CS), which consists of two domains, the glutamate 5-kinase (G5K) and the gamma-glutamyl phosphate reductase (GR5P) domain. The location of the mutations in the gene has influence on whether the amino acid levels are affected. Mutations affecting the G5K domain have previously been found to cause reduced plasma levels of proline, citrulline and arginine, whereas such effect is not seen with mutations affecting the GR5P domain...
May 12, 2018: Neurogenetics
https://www.readbyqxmd.com/read/29753924/converging-cellular-themes-for-the-hereditary-spastic-paraplegias
#4
REVIEW
Craig Blackstone
Hereditary spastic paraplegias (HSPs) are neurologic disorders characterized by prominent lower-extremity spasticity, resulting from a length-dependent axonopathy of corticospinal upper motor neurons. They are among the most genetically-diverse neurologic disorders, with >80 distinct genetic loci and over 60 identified genes. Studies investigating the molecular pathogenesis underlying HSPs have emphasized the importance of converging cellular pathogenic themes in the most common forms of HSP, providing compelling targets for therapy...
May 10, 2018: Current Opinion in Neurobiology
https://www.readbyqxmd.com/read/29747824/congenital-disorders-of-ganglioside-biosynthesis
#5
T August Li, Ronald L Schnaar
Gangliosides are expressed on all vertebrate cells and tissues, but are particularly abundant in the mammalian brain, where they constitute major cell-surface determinants on all nerve cells. The same four ganglioside structures, GM1, GD1a, GD1b, and GT1b, constitute the great majority of brain gangliosides in all mammals. Biosynthesis of these major brain gangliosides starts with addition of glucose to the ceramide lipid carrier followed by stepwise addition of up to six additional monosaccharides. This primarily involves the sequential action of seven glycosyltransferases, many of which appear to act specifically on glycolipid (rather than glycoprotein) acceptors...
2018: Progress in Molecular Biology and Translational Science
https://www.readbyqxmd.com/read/29735986/novel-splice-site-variant-of-uchl1-in-an-indian-family-with-autosomal-recessive-spastic-paraplegia-79
#6
Aneek Das Bhowmik, Siddaramappa J Patil, Dipti Vijayrao Deshpande, Venkatraman Bhat, Ashwin Dalal
Spastic Paraplegia-79 (SPG79) is an autosomal recessive type of childhood onset complicated by hereditary spastic paraplegia. SPG79 is characterized by spasticity, paraplegia, optic atrophy, cerebellar signs, and other variable clinical features. Recessive, disease causing variants in Ubiquitin C-terminal hydrolase-L1 (UCHL1) gene have been implicated as a cause for SPG79 in two families till now. In this study, we report on a third family of SPG79 with two similarly affected siblings, harboring a novel homozygous splice-site variant in the UCHL1 gene (NM_004181...
May 7, 2018: Journal of Human Genetics
https://www.readbyqxmd.com/read/29726929/impaired-mitochondrial-dynamics-underlie-axonal-defects-in-hereditary-spastic-paraplegias
#7
Kyle Denton, Yongchao Mou, Chong-Chong Xu, Dhruvi Shah, Jaerak Chang, Craig Blackstone, Xue-Jun Li
Mechanisms by which long corticospinal axons degenerate in hereditary spastic paraplegia (HSP) are largely unknown. Here, we have generated induced pluripotent stem cells (iPSCs) from patients with two autosomal recessive forms of HSP, SPG15 and SPG48, which are caused by mutations in the ZFYVE26 and AP5Z1 genes encoding proteins in the same complex, the spastizin and AP5Z1 proteins, respectively. In patient iPSC-derived telencephalic glutamatergic and midbrain dopaminergic neurons, neurite number, length and branching are significantly reduced, recapitulating disease-specific phenotypes...
May 2, 2018: Human Molecular Genetics
https://www.readbyqxmd.com/read/29698489/altered-distribution-of-atg9a-and-accumulation-of-axonal-aggregates-in-neurons-from-a-mouse-model-of-ap-4-deficiency-syndrome
#8
Raffaella De Pace, Miguel Skirzewski, Markus Damme, Rafael Mattera, Jeffrey Mercurio, Arianne M Foster, Loreto Cuitino, Michal Jarnik, Victoria Hoffmann, H Douglas Morris, Tae-Un Han, Grazia M S Mancini, Andrés Buonanno, Juan S Bonifacino
The hereditary spastic paraplegias (HSP) are a clinically and genetically heterogeneous group of disorders characterized by progressive lower limb spasticity. Mutations in subunits of the heterotetrameric (ε-β4-μ4-σ4) adaptor protein 4 (AP-4) complex cause an autosomal recessive form of complicated HSP referred to as "AP-4 deficiency syndrome". In addition to lower limb spasticity, this syndrome features intellectual disability, microcephaly, seizures, thin corpus callosum and upper limb spasticity...
April 26, 2018: PLoS Genetics
https://www.readbyqxmd.com/read/29691679/the-impact-of-next-generation-sequencing-on-the-diagnosis-of-pediatric-onset-hereditary-spastic-paraplegias-new-genotype-phenotype-correlations-for-rare-hsp-related-genes
#9
Lorena Travaglini, Chiara Aiello, Fabrizia Stregapede, Adele D'Amico, Viola Alesi, Andrea Ciolfi, Alessandro Bruselles, Michela Catteruccia, Simone Pizzi, Ginevra Zanni, Sara Loddo, Sabina Barresi, Gessica Vasco, Marco Tartaglia, Enrico Bertini, Francesco Nicita
Hereditary spastic paraplegias (HSP) are clinical and genetic heterogeneous diseases with more than 80 disease genes identified thus far. Studies on large cohorts of HSP patients showed that, by means of current technologies, the percentage of genetically solved cases is close to 50%. Notably, the percentage of molecularly confirmed diagnoses decreases significantly in sporadic patients. To describe our diagnostic molecular genetic approach on patients with pediatric-onset pure and complex HSP, 47 subjects with HSP underwent molecular screening of 113 known and candidate disease genes by targeted capture and massively parallel sequencing...
April 24, 2018: Neurogenetics
https://www.readbyqxmd.com/read/29678961/-capn1-mutations-broadening-the-hereditary-spastic-paraplegia-spinocerebellar-ataxia-phenotype
#10
Jeffrey Lambe, Bernadette Monaghan, Tudor Munteanu, Janice Redmond
Increasing availability of next-generation sequencing technologies has revealed several limitations of diagnosis-driven traditional clinicogenetic disease classifications, particularly among patients with an atypical or mixed phenotype. Hereditary spastic paraplegia (HSP) and spinocerebellar ataxia (SCA) are two such disease entities with an often overlapping presentation, in which next generation exome sequencing has played a key role in identification of genes causing disease along a continuum of ataxia and spasticity...
April 20, 2018: Practical Neurology
https://www.readbyqxmd.com/read/29670510/differential-expression-of-several-mirnas-and-the-host-genes-aatk-and-dnm2-in-leukocytes-of-sporadic-als-patients
#11
Katarina Vrabec, Emanuela Boštjančič, Blaž Koritnik, Lea Leonardis, Leja Dolenc Grošelj, Janez Zidar, Boris Rogelj, Damjan Glavač, Metka Ravnik-Glavač
Genetic studies have managed to explain many cases of familial amyotrophic lateral sclerosis (ALS) through mutations in several genes. However, the cause of a majority of sporadic cases remains unknown. Recently, epigenetics, especially miRNA studies, show some promising aspects. We aimed to evaluate the differential expression of 10 miRNAs, including miR-9, miR-338, miR-638, miR-663a, miR-124a, miR-143, miR-451a, miR-132, miR-206, and let-7b, for which some connection to ALS was shown previously in ALS culture cells, animal models or patients, and in three miRNA host genes, including C1orf61 (miR-9), AATK (miR-338), and DNM2 (miR-638), in leukocyte samples of 84 patients with sporadic ALS...
2018: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/29613898/hereditary-myelopathies
#12
Peter Hedera
PURPOSE OF REVIEW: Hereditary myelopathies are very diverse genetic disorders, and many of them represent a widespread neurodegenerative process rather than isolated spinal cord dysfunction. This article reviews various types of inherited myelopathies, with emphasis on hereditary spastic paraplegias and spastic ataxias. RECENT FINDINGS: The ever-growing number of myelopathy-causing genes and broadening of phenotype-genotype correlations makes the molecular diagnosis of inherited myelopathies a daunting task...
April 2018: Continuum: Lifelong Learning in Neurology
https://www.readbyqxmd.com/read/29577077/-aco2-homozygous-missense-mutation-associated-with-complicated-hereditary-spastic-paraplegia
#13
Christian G Bouwkamp, Zaid Afawi, Aviva Fattal-Valevski, Inge E Krabbendam, Stefano Rivetti, Rafik Masalha, Marialuisa Quadri, Guido J Breedveld, Hanna Mandel, Muhammad Abu Tailakh, H Berna Beverloo, Giovanni Stevanin, Alexis Brice, Wilfred F J van IJcken, Meike W Vernooij, Amalia M Dolga, Femke M S de Vrij, Vincenzo Bonifati, Steven A Kushner
Objective: To identify the clinical characteristics and genetic etiology of a family affected with hereditary spastic paraplegia (HSP). Methods: Clinical, genetic, and functional analyses involving genome-wide linkage coupled to whole-exome sequencing in a consanguineous family with complicated HSP. Results: A homozygous missense mutation was identified in the ACO2 gene (c.1240T>G p.Phe414Val) that segregated with HSP complicated by intellectual disability and microcephaly...
April 2018: Neurology. Genetics
https://www.readbyqxmd.com/read/29566793/genome-wide-analyses-identify-kif5a-as-a-novel-als-gene
#14
Aude Nicolas, Kevin P Kenna, Alan E Renton, Nicola Ticozzi, Faraz Faghri, Ruth Chia, Janice A Dominov, Brendan J Kenna, Mike A Nalls, Pamela Keagle, Alberto M Rivera, Wouter van Rheenen, Natalie A Murphy, Joke J F A van Vugt, Joshua T Geiger, Rick A Van der Spek, Hannah A Pliner, Shankaracharya, Bradley N Smith, Giuseppe Marangi, Simon D Topp, Yevgeniya Abramzon, Athina Soragia Gkazi, John D Eicher, Aoife Kenna, Gabriele Mora, Andrea Calvo, Letizia Mazzini, Nilo Riva, Jessica Mandrioli, Claudia Caponnetto, Stefania Battistini, Paolo Volanti, Vincenzo La Bella, Francesca L Conforti, Giuseppe Borghero, Sonia Messina, Isabella L Simone, Francesca Trojsi, Fabrizio Salvi, Francesco O Logullo, Sandra D'Alfonso, Lucia Corrado, Margherita Capasso, Luigi Ferrucci, Cristiane de Araujo Martins Moreno, Sitharthan Kamalakaran, David B Goldstein, Aaron D Gitler, Tim Harris, Richard M Myers, Hemali Phatnani, Rajeeva Lochan Musunuri, Uday Shankar Evani, Avinash Abhyankar, Michael C Zody, Julia Kaye, Steven Finkbeiner, Stacia K Wyman, Alex LeNail, Leandro Lima, Ernest Fraenkel, Clive N Svendsen, Leslie M Thompson, Jennifer E Van Eyk, James D Berry, Timothy M Miller, Stephen J Kolb, Merit Cudkowicz, Emily Baxi, Michael Benatar, J Paul Taylor, Evadnie Rampersaud, Gang Wu, Joanne Wuu, Giuseppe Lauria, Federico Verde, Isabella Fogh, Cinzia Tiloca, Giacomo P Comi, Gianni Sorarù, Cristina Cereda, Philippe Corcia, Hannu Laaksovirta, Liisa Myllykangas, Lilja Jansson, Miko Valori, John Ealing, Hisham Hamdalla, Sara Rollinson, Stuart Pickering-Brown, Richard W Orrell, Katie C Sidle, Andrea Malaspina, John Hardy, Andrew B Singleton, Janel O Johnson, Sampath Arepalli, Peter C Sapp, Diane McKenna-Yasek, Meraida Polak, Seneshaw Asress, Safa Al-Sarraj, Andrew King, Claire Troakes, Caroline Vance, Jacqueline de Belleroche, Frank Baas, Anneloor L M A Ten Asbroek, José Luis Muñoz-Blanco, Dena G Hernandez, Jinhui Ding, J Raphael Gibbs, Sonja W Scholz, Mary Kay Floeter, Roy H Campbell, Francesco Landi, Robert Bowser, Stefan M Pulst, John M Ravits, Daniel J L MacGowan, Janine Kirby, Erik P Pioro, Roger Pamphlett, James Broach, Glenn Gerhard, Travis L Dunckley, Christopher B Brady, Neil W Kowall, Juan C Troncoso, Isabelle Le Ber, Kevin Mouzat, Serge Lumbroso, Terry D Heiman-Patterson, Freya Kamel, Ludo Van Den Bosch, Robert H Baloh, Tim M Strom, Thomas Meitinger, Aleksey Shatunov, Kristel R Van Eijk, Mamede de Carvalho, Maarten Kooyman, Bas Middelkoop, Matthieu Moisse, Russell L McLaughlin, Michael A Van Es, Markus Weber, Kevin B Boylan, Marka Van Blitterswijk, Rosa Rademakers, Karen E Morrison, A Nazli Basak, Jesús S Mora, Vivian E Drory, Pamela J Shaw, Martin R Turner, Kevin Talbot, Orla Hardiman, Kelly L Williams, Jennifer A Fifita, Garth A Nicholson, Ian P Blair, Guy A Rouleau, Jesús Esteban-Pérez, Alberto García-Redondo, Ammar Al-Chalabi, Ekaterina Rogaeva, Lorne Zinman, Lyle W Ostrow, Nicholas J Maragakis, Jeffrey D Rothstein, Zachary Simmons, Johnathan Cooper-Knock, Alexis Brice, Stephen A Goutman, Eva L Feldman, Summer B Gibson, Franco Taroni, Antonia Ratti, Cinzia Gellera, Philip Van Damme, Wim Robberecht, Pietro Fratta, Mario Sabatelli, Christian Lunetta, Albert C Ludolph, Peter M Andersen, Jochen H Weishaupt, William Camu, John Q Trojanowski, Vivianna M Van Deerlin, Robert H Brown, Leonard H van den Berg, Jan H Veldink, Matthew B Harms, Jonathan D Glass, David J Stone, Pentti Tienari, Vincenzo Silani, Adriano Chiò, Christopher E Shaw, Bryan J Traynor, John E Landers
To identify novel genes associated with ALS, we undertook two lines of investigation. We carried out a genome-wide association study comparing 20,806 ALS cases and 59,804 controls. Independently, we performed a rare variant burden analysis comparing 1,138 index familial ALS cases and 19,494 controls. Through both approaches, we identified kinesin family member 5A (KIF5A) as a novel gene associated with ALS. Interestingly, mutations predominantly in the N-terminal motor domain of KIF5A are causative for two neurodegenerative diseases: hereditary spastic paraplegia (SPG10) and Charcot-Marie-Tooth type 2 (CMT2)...
March 21, 2018: Neuron
https://www.readbyqxmd.com/read/29544888/clinical-phenotype-of-hereditary-spastic-paraplegia-due-to-kif1c-gene-mutations-across-life-span
#15
Didem Yücel-Yılmaz, Emrah Yücesan, Dilek Yalnızoğlu, Kader Karlı Oğuz, Mahmut Şamil Sağıroğlu, Uğur Özbek, Esra Serdaroğlu, Başar Bilgiç, Sevim Erdem, Sibel Aylin Uğur İşeri, Haşmet Hanağası, Hakan Gürvit, Rıza Köksal Özgül, Ali Dursun
Hereditary spastic paraplegias (HSPs) are a group of genetic disorders resulting in pyramidal tract impairment, predominantly in lower limbs. KIF1C gene has recently been identified as one of the genetic causes of HSP and associated with pure or complicated HSP. We present three patients with complicated HSP from two unrelated families, who had early onset progressive cerebellar signs and developed pyramidal tract signs during follow-up. Whole exome sequencing in these patients followed by segregation analysis identified novel truncating KIF1C mutations (c...
June 2018: Brain & Development
https://www.readbyqxmd.com/read/29528531/a-novel-heterozygous-variant-in-erlin2-causes-autosomal-dominant-pure-hereditary-spastic-paraplegia
#16
S L Rydning, A Dudesek, F Rimmele, C Funke, S Krüger, S Biskup, M D Vigeland, H S Hjorthaug, Y Sejersted, C Tallaksen, K K Selmer, C Kamm
BACKGROUND AND PURPOSE: Hereditary spastic paraplegias (HSPs) are clinically and genetically heterogeneous monogenic disorders. To date, nearly 70 genes are known to be causative. The aim of this project was to identify the genetic cause of autosomal dominantly inherited pure HSP in two large, unrelated non-consanguineous families. METHODS: The two families were characterized clinically and selected members underwent whole exome sequencing. Potentially disease-causing variants were confirmed by Sanger sequencing and their functional consequences on protein function were predicted by bioinformatic prediction tools...
March 12, 2018: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/29524657/novel-homozygous-gba2-mutation-in-a-patient-with-complicated-spastic-paraplegia
#17
Giulia Coarelli, Silvia Romano, Lorena Travaglini, Michela Ferraldeschi, Francesco Nicita, Maria Spadaro, Arianna Fornasiero, Marina Frontali, Marco Salvetti, Enrico Bertini, Giovanni Ristori
Hereditary spastic paraplegias (HSPs) are a heterogeneous group of neurological disorders characterized primarily by a pyramidal syndrome with lower limb spasticity, which can manifest as pure HSP or associated with a number of neurological or non-neurological signs (i.e., complicated HSPs). The clinical variability of HSPs is associated with a wide genetic heterogeneity, with more than eighty causative genes known. Recently, next generation sequencing (NGS) has allowed increasing genetic definition in such a heterogeneous group of disorders...
May 2018: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/29518090/gait-phenotypes-in-paediatric-hereditary-spastic-paraplegia-revealed-by-dynamic-time-warping-analysis-and-random-forests
#18
Irene Pulido-Valdeolivas, David Gómez-Andrés, Juan Andrés Martín-Gonzalo, Irene Rodríguez-Andonaegui, Javier López-López, Samuel Ignacio Pascual-Pascual, Estrella Rausell
The Hereditary Spastic Paraplegias (HSP) are a group of heterogeneous disorders with a wide spectrum of underlying neural pathology, and hence HSP patients express a variety of gait abnormalities. Classification of these phenotypes may help in monitoring disease progression and personalizing therapies. This is currently managed by measuring values of some kinematic and spatio-temporal parameters at certain moments during the gait cycle, either in the doctor´s surgery room or after very precise measurements produced by instrumental gait analysis (IGA)...
2018: PloS One
https://www.readbyqxmd.com/read/29500230/ethanolamine-phosphotransferase-1-selenoprotein-i-is-critical-for-the-neural-development-and-maintenance-of-plasmalogen-in-human
#19
Yasuhiro Horibata, Orly Elpeleg, Ayelet Eran, Yoshio Hirabayashi, David Savitzki, Galit Tal, Hanna Mandel, Hiroyuki Sugimoto
Ethanolamine phosphotransferase 1 (EPT1), also known as selenoprotein 1 (SELENOI), is an enzyme that transfers phosphoethanolamine from cytidine diphosphate (CDP)-ethanolamine to lipid acceptors to produce ethanolamine glycerophospholipids such as diacyl-linked phosphatidylethanolamine (PE) and ether-linked plasmalogen (plasmenyl-PE). However, to date there has been no analysis of the metabolomic consequence of the mutation of EPT1 on the concentration of ethanolamine glycerophospholipids in mammalian cells...
March 2, 2018: Journal of Lipid Research
https://www.readbyqxmd.com/read/29481671/mechanistic-basis-of-an-epistatic-interaction-reducing-age-at-onset-in-hereditary-spastic-paraplegia
#20
Timothy Newton, Rachel Allison, James R Edgar, Jennifer H Lumb, Catherine E Rodger, Paul T Manna, Tania Rizo, Zacharias Kohl, Anders O H Nygren, Larissa Arning, Rebecca Schüle, Christel Depienne, Lisa Goldberg, Christiane Frahm, Giovanni Stevanin, Alexandra Durr, Ludger Schöls, Beate Winner, Christian Beetz, Evan Reid
Many genetic neurological disorders exhibit variable expression within affected families, often exemplified by variations in disease age at onset. Epistatic effects (i.e. effects of modifier genes on the disease gene) may underlie this variation, but the mechanistic basis for such epistatic interactions is rarely understood. Here we report a novel epistatic interaction between SPAST and the contiguous gene DPY30, which modifies age at onset in hereditary spastic paraplegia, a genetic axonopathy. We found that patients with hereditary spastic paraplegia caused by genomic deletions of SPAST that extended into DPY30 had a significantly younger age at onset...
May 1, 2018: Brain: a Journal of Neurology
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